.landing-page {
  min-height: 100vh;
  color-scheme: light;
  --oa-font: "OpenAI Sans", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --oa-ink: #000000;
  --oa-muted: rgba(0, 0, 0, 0.6);
  --oa-faint: rgba(0, 0, 0, 0.42);
  --oa-line: rgba(0, 0, 0, 0.12);
  --oa-soft-line: rgba(0, 0, 0, 0.08);
  --oa-bg: #ffffff;
  --oa-surface: #f1f1f1;
  --oa-accent: #00836d;
  --hero-progress: 0;
  --hero-fade: 1;
  --beam-shift: 0px;
  --dash-x: 0px;
  --dash-y: 0px;
  --voucher-x: 0px;
  --voucher-y: 0px;
  --receipt-x: 0px;
  --receipt-y: 0px;
  --assessment-x: 0px;
  --assessment-y: 0px;
  --source-x: 0px;
  --source-y: 0px;
  --pager-progress: 0;
  --mouse-yaw-soft: 0deg;
  --mouse-yaw-mid: 0deg;
  --mouse-yaw-strong: 0deg;
  --mouse-pitch-soft: 0deg;
  --mouse-pitch-mid: 0deg;
  --mouse-pitch-strong: 0deg;
  --mouse-x-soft: 0px;
  --mouse-x-mid: 0px;
  --mouse-x-strong: 0px;
  --mouse-y-soft: 0px;
  --mouse-y-mid: 0px;
  --mouse-y-strong: 0px;
  color: var(--oa-ink);
  background: var(--oa-bg);
  font-family: var(--oa-font);
  overflow-x: hidden;
}

.landing-nav {
  position: fixed;
  z-index: 20;
  inset: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 22px clamp(20px, 5vw, 72px);
  color: var(--oa-ink);
}

.landing-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
}

.landing-brand:hover,
.landing-nav a:hover {
  text-decoration: none;
}

.nexora-logo {
  display: block;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  object-fit: contain;
}

.landing-brand-text {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.landing-brand-text strong {
  font-size: 16px;
  line-height: 1.2;
  letter-spacing: 0.01em;
}

.landing-brand-text em {
  color: var(--oa-faint);
  font-size: 11px;
  font-style: normal;
  font-weight: 700;
  line-height: 1.2;
}

.landing-nav nav {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
}

.landing-nav nav a {
  color: var(--oa-muted);
  font-size: 14px;
  font-weight: 700;
}

.landing-hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-items: end;
  overflow: hidden;
  padding: 118px clamp(20px, 5vw, 72px) 34px;
  isolation: isolate;
}

.landing-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -3;
  background:
    linear-gradient(90deg, rgba(5, 8, 7, 0.98) 0%, rgba(5, 8, 7, 0.78) 34%, rgba(5, 8, 7, 0.38) 64%, rgba(5, 8, 7, 0.86) 100%),
    linear-gradient(180deg, rgba(5, 8, 7, 0.12) 0%, #050807 100%);
}

.teaching-hero::before {
  background:
    linear-gradient(90deg, rgba(5, 8, 7, 0.99) 0%, rgba(5, 8, 7, 0.84) 38%, rgba(5, 8, 7, 0.42) 64%, rgba(5, 8, 7, 0.9) 100%),
    radial-gradient(circle at 34% 48%, rgba(143, 255, 231, 0.13), transparent 34%),
    linear-gradient(180deg, rgba(5, 8, 7, 0.1) 0%, #050807 100%);
}

.landing-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 44%;
  z-index: -1;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0) 0%, var(--oa-bg) 82%);
}

.cinematic-stage {
  position: absolute;
  inset: 0;
  z-index: 0;
  perspective: 1400px;
  transform-style: preserve-3d;
  animation: stage-drift 18s ease-in-out infinite alternate;
}

.stage-grid {
  position: absolute;
  inset: -12% -8%;
  opacity: 0.52;
  background-image:
    linear-gradient(rgba(124, 224, 207, 0.16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124, 224, 207, 0.14) 1px, transparent 1px);
  background-size: 88px 88px;
  transform: rotateX(62deg) rotateZ(-7deg) translate3d(12%, 18%, -260px);
  transform-origin: center;
  animation: grid-flow 16s linear infinite;
}

.stage-beams {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.stage-beam {
  position: absolute;
  height: 1px;
  border-radius: 999px;
  background: linear-gradient(90deg, transparent, rgba(117, 255, 226, 0.8), transparent);
  box-shadow: 0 0 22px rgba(109, 255, 224, 0.22);
  transform: translateX(var(--beam-shift)) rotate(-8.5deg);
  transform-origin: center;
  animation: lightbar-pass 8s ease-in-out infinite;
}

.beam-primary {
  top: 17%;
  left: -18%;
  width: 140%;
  height: 2px;
  opacity: 0.88;
}

.beam-secondary {
  top: 9%;
  left: 8%;
  width: 82%;
  opacity: 0.34;
  animation-delay: -2s;
}

.beam-tertiary {
  top: 27%;
  left: -8%;
  width: 108%;
  opacity: 0.28;
  animation-delay: -4.5s;
}

.beam-quaternary {
  top: 38%;
  left: 40%;
  width: 72%;
  opacity: 0.2;
  animation-delay: -1.2s;
}

.beam-faint {
  top: 50%;
  left: 18%;
  width: 92%;
  opacity: 0.14;
  animation-delay: -6s;
}

.scene-panel,
.receipt-frame,
.ipa-flow {
  position: absolute;
  border: 1px solid rgba(167, 230, 216, 0.24);
  border-radius: 12px;
  background: rgba(7, 18, 16, 0.78);
  box-shadow: 0 24px 56px rgba(0, 0, 0, 0.38);
  backdrop-filter: blur(10px);
  opacity: var(--hero-fade);
  will-change: transform, opacity;
  transition:
    opacity 900ms cubic-bezier(0.16, 1, 0.3, 1),
    filter 900ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 900ms cubic-bezier(0.16, 1, 0.3, 1);
}

.dashboard-panel {
  z-index: 1;
  top: 14%;
  right: 7%;
  width: min(520px, 38vw);
  padding: 18px;
  opacity: var(--hero-fade);
  transform: translate3d(calc(var(--dash-x) + var(--mouse-x-soft)), calc(var(--dash-y) + var(--mouse-y-soft)), 36px) rotateY(calc(-14deg + var(--mouse-yaw-soft))) rotateX(calc(5deg - var(--mouse-pitch-soft)));
  animation: card-float 9s ease-in-out infinite alternate;
}

.voucher-panel {
  z-index: 4;
  top: 60%;
  right: 10%;
  bottom: auto;
  width: min(320px, 23.5vw);
  overflow: hidden;
  padding: 10px;
  background: rgba(6, 17, 15, 0.96);
  backdrop-filter: none;
  opacity: var(--hero-fade);
  transform: translate3d(calc(var(--voucher-x) + var(--mouse-x-mid)), calc(var(--voucher-y) + var(--mouse-y-mid)), 54px) rotateY(calc(-8deg + var(--mouse-yaw-mid))) rotateX(calc(3deg - var(--mouse-pitch-mid)));
  animation: card-float 8s ease-in-out 800ms infinite alternate;
}

.assessment-panel {
  z-index: 3;
  top: 41.5%;
  right: 8.5%;
  width: min(280px, 20.5vw);
  padding: 16px;
  opacity: var(--hero-fade);
  transform: translate3d(calc(var(--assessment-x) + var(--mouse-x-mid)), calc(var(--assessment-y) + var(--mouse-y-mid)), 78px) rotateY(calc(-12deg + var(--mouse-yaw-mid))) rotateX(calc(5deg - var(--mouse-pitch-mid)));
  animation: card-float 8.8s ease-in-out 300ms infinite alternate;
}

.source-panel {
  z-index: 2;
  top: 51%;
  right: 29.5%;
  width: min(270px, 19vw);
  padding: 8px;
  overflow: hidden;
  opacity: var(--hero-fade);
  transform: translate3d(calc(var(--source-x) + var(--mouse-x-soft)), calc(var(--source-y) + var(--mouse-y-soft)), 42px) rotateY(calc(-9deg + var(--mouse-yaw-soft))) rotateX(calc(3deg - var(--mouse-pitch-soft)));
  animation: source-float 7.5s ease-in-out infinite alternate;
}

.panel-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
  color: rgba(219, 255, 247, 0.78);
  font-size: 12px;
  font-weight: 700;
}

.mini-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 16px;
}

.mini-metrics div {
  border: 1px solid rgba(183, 244, 230, 0.18);
  border-radius: 9px;
  padding: 12px;
  background: rgba(233, 255, 249, 0.06);
}

.mini-metrics strong {
  display: block;
  color: #82ffe3;
  font-size: 28px;
  line-height: 1;
}

.mini-metrics span {
  color: rgba(240, 255, 251, 0.7);
  font-size: 12px;
}

.dashboard-lines {
  display: grid;
  gap: 9px;
}

.dashboard-lines div {
  display: grid;
  grid-template-columns: 72px 1fr 40px;
  align-items: center;
  gap: 10px;
  color: rgba(240, 255, 251, 0.7);
  font-size: 12px;
  font-weight: 800;
}

.dashboard-lines em,
.dashboard-lines b {
  font-style: normal;
}

.dashboard-lines span {
  height: 8px;
  border-radius: 999px;
  background: linear-gradient(90deg, #29bea4 var(--w), rgba(228, 255, 249, 0.12) var(--w));
}

.voucher-summary {
  max-width: 100%;
  margin: 0 0 6px;
  color: rgba(244, 255, 252, 0.78);
  font-size: 11px;
  font-weight: 800;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ledger-preview {
  display: grid;
  border: 1px solid rgba(183, 244, 230, 0.16);
  border-radius: 9px;
  background: rgba(7, 18, 16, 0.92);
  overflow: hidden;
}

.ledger-row {
  display: grid;
  grid-template-columns: 44px 1fr 94px;
  align-items: center;
  gap: 8px;
  padding: 5px 8px;
  border-top: 1px solid rgba(183, 244, 230, 0.12);
  background: rgba(12, 31, 27, 0.88);
  color: rgba(246, 255, 252, 0.9);
  font-size: 11px;
}

.ledger-row:first-child {
  border-top: 0;
}

.ledger-head {
  color: rgba(230, 255, 249, 0.58);
  background: rgba(22, 48, 42, 0.92);
  font-weight: 800;
}

.ledger-row strong {
  overflow: hidden;
  color: #ffffff;
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ledger-row em {
  color: #8fffe7;
  font-style: normal;
  font-weight: 900;
  text-align: right;
}

.voucher-status {
  display: none;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 6px;
}

.voucher-status span {
  min-height: 20px;
  font-size: 10px;
}

.voucher-status span {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0 8px;
  border: 1px solid rgba(143, 255, 231, 0.26);
  border-radius: 999px;
  color: #8fffe7;
  background: rgba(143, 255, 231, 0.08);
  font-size: 11px;
  font-weight: 900;
}

.score-dimensions {
  display: grid;
  gap: 9px;
}

.score-dimensions div {
  display: grid;
  grid-template-columns: 72px 1fr 42px;
  align-items: center;
  gap: 8px;
  color: rgba(241, 255, 251, 0.74);
  font-size: 12px;
  font-weight: 800;
}

.score-dimensions i {
  height: 7px;
  border-radius: 999px;
  background: linear-gradient(90deg, #8fffe7 var(--w), rgba(228, 255, 249, 0.12) var(--w));
}

.score-dimensions b,
.assessment-panel .panel-topline strong {
  color: #8fffe7;
  font-weight: 900;
}

.assessment-panel p,
.source-panel p {
  margin: 12px 0 0;
  color: rgba(244, 255, 252, 0.7);
  font-size: 12px;
  line-height: 1.55;
}

.source-panel strong {
  display: block;
  margin: 9px 8px 0;
  color: #ffffff;
  font-size: 15px;
  line-height: 1.35;
}

.source-panel p {
  margin: 5px 8px 8px;
}

.source-window-bar {
  display: grid;
  grid-template-columns: auto auto auto 1fr;
  align-items: center;
  gap: 5px;
  padding: 5px 7px 8px;
  color: rgba(244, 255, 252, 0.7);
  font-size: 11px;
  font-weight: 800;
}

.source-window-bar i {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: rgba(143, 255, 231, 0.36);
}

.source-window-bar span {
  justify-self: end;
}

.source-panel img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  object-position: 50% 20%;
  border: 1px solid rgba(167, 230, 216, 0.18);
  border-radius: 8px;
  filter: saturate(0.84) contrast(1.05) brightness(0.72);
}

.receipt-frame {
  z-index: 5;
  top: 40%;
  right: 34%;
  width: min(150px, 11vw);
  overflow: hidden;
  background: #07110f;
  opacity: var(--hero-fade);
  transform: translate3d(calc(var(--receipt-x) - var(--mouse-x-strong) - var(--mouse-x-soft)), calc(var(--receipt-y) - var(--mouse-y-strong) - var(--mouse-y-soft)), 86px) rotateY(calc(10deg + var(--mouse-yaw-strong) + var(--mouse-yaw-soft))) rotateX(calc(5deg - var(--mouse-pitch-strong) - var(--mouse-pitch-soft)));
  animation: receipt-float 7.5s ease-in-out infinite alternate;
}

.receipt-frame img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  opacity: 0.74;
  filter: saturate(0.68) contrast(1.08) brightness(0.72);
}

.scan-line {
  position: absolute;
  left: 0;
  right: 0;
  top: 14%;
  height: 2px;
  background: #65ffdf;
  box-shadow: 0 0 22px rgba(101, 255, 223, 0.86);
  animation: scan-pass 2.8s linear infinite;
}

.scan-box {
  position: absolute;
  min-height: 24px;
  display: inline-flex;
  align-items: center;
  padding: 0 8px;
  border: 1px solid rgba(101, 255, 223, 0.74);
  border-radius: 4px;
  color: #d7fff7;
  background: rgba(3, 30, 25, 0.72);
  font-size: 12px;
  font-weight: 800;
}

.box-one { top: 34%; left: 12%; }
.box-two { top: 52%; right: 13%; }
.box-three { bottom: 15%; left: 18%; }

.ipa-flow {
  z-index: 1;
  right: 10.5%;
  bottom: 4%;
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 12px 14px;
  color: rgba(239, 255, 252, 0.9);
  font-size: 13px;
  font-weight: 800;
  transform: none;
}

.ipa-flow i {
  width: 34px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(101, 255, 223, 0.1), rgba(101, 255, 223, 0.88));
  animation: pulse-line 1.8s ease-in-out infinite;
}

.hero-copy {
  position: relative;
  z-index: 3;
  max-width: 820px;
  margin-left: clamp(18px, 3vw, 68px);
  padding-bottom: clamp(170px, 22vh, 240px);
}

.hero-kicker {
  margin-bottom: 18px;
  color: #8fffe7;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0;
}

.hero-copy h1 {
  max-width: min(900px, calc(100vw - 48px));
  margin: 0;
  color: #ffffff;
  font-size: clamp(40px, 4.7vw, 64px);
  line-height: 1.04;
  font-weight: 900;
  letter-spacing: -0.02em;
  white-space: nowrap;
  text-wrap: auto;
}

.hero-copy h1 span {
  display: block;
}

.hero-lede {
  max-width: 720px;
  margin-top: 24px;
  color: rgba(245, 255, 252, 0.78);
  font-size: clamp(17px, 1.7vw, 22px);
  line-height: 1.8;
  text-wrap: pretty;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.hero-primary,
.hero-secondary {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  padding: 0 22px;
  font-weight: 800;
  text-decoration: none;
}

.hero-primary {
  color: #03211c;
  background: #8fffe7;
}

.hero-secondary {
  color: #ffffff;
  border: 1px solid rgba(226, 255, 249, 0.34);
  background: rgba(255, 255, 255, 0.06);
}

.hero-primary:hover,
.hero-secondary:hover {
  text-decoration: none;
}

.hero-metrics {
  position: absolute;
  z-index: 3;
  left: 0;
  right: 0;
  bottom: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  width: auto;
  overflow: hidden;
  border: 0;
  border-radius: 0;
  background:
    radial-gradient(circle at 8% 0%, rgba(143, 255, 231, 0.16), transparent 24%),
    linear-gradient(90deg, rgba(6, 26, 22, 0.96), rgba(5, 8, 7, 0.96) 22%, rgba(5, 8, 7, 0.94) 78%, rgba(7, 31, 26, 0.96));
  box-shadow: none;
}

.hero-metrics::before,
.hero-metrics::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  pointer-events: none;
}

.hero-metrics::before {
  top: 0;
  background: linear-gradient(90deg, #ff37d2 0%, #74fff0 34%, rgba(143, 255, 231, 0.22) 100%);
}

.hero-metrics::after {
  bottom: 0;
  background: linear-gradient(90deg, rgba(255, 55, 210, 0.42), #49ffd7 70%, rgba(143, 255, 231, 0.16));
}

.impact-metric {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  grid-template-areas:
    "value"
    "label"
    "note";
  gap: 0;
  align-content: center;
  align-items: start;
  min-width: 0;
  padding: clamp(20px, 2vw, 28px) clamp(22px, 4.8vw, 92px);
  border-left: 1px solid rgba(214, 255, 246, 0.12);
}

.impact-metric:first-child {
  border-left: 0;
}

.impact-metric strong {
  grid-area: value;
  color: #8fffe7;
  font-size: clamp(30px, 3.2vw, 54px);
  line-height: 0.96;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.impact-label {
  grid-area: label;
  margin-top: 6px;
  color: #ffffff;
  font-size: clamp(13px, 1.1vw, 16px);
  font-weight: 900;
}

.impact-note {
  grid-area: note;
  margin-top: 4px;
  color: rgba(245, 255, 252, 0.64);
  font-size: 12px;
  font-style: normal;
  line-height: 1.45;
}

.landing-section {
  display: grid;
  gap: clamp(22px, 4vw, 56px);
  width: min(1180px, calc(100vw - 40px));
  margin: 0 auto;
  padding: clamp(66px, 9vw, 112px) 0;
  color: #f8fffd;
}

.landing-label {
  display: block;
  margin-bottom: 14px;
  color: #8fffe7;
  font-size: 13px;
  font-weight: 900;
}

.landing-section h2 {
  max-width: 820px;
  margin: 0;
  color: #ffffff;
  font-size: clamp(32px, 4.5vw, 62px);
  line-height: 1.1;
  font-weight: 900;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.landing-section p {
  max-width: 760px;
  color: rgba(244, 255, 252, 0.76);
  font-size: 17px;
  line-height: 1.85;
}

.platform-section {
  grid-template-columns: minmax(0, 0.78fr) minmax(520px, 1fr);
  align-items: start;
  border-top: 1px solid rgba(217, 255, 247, 0.14);
}

.platform-map {
  display: grid;
  gap: 12px;
}

.platform-map article {
  display: grid;
  grid-template-columns: 94px minmax(0, 1fr);
  column-gap: 18px;
  row-gap: 6px;
  align-items: start;
  padding: 18px 20px;
  border: 1px solid rgba(202, 255, 243, 0.18);
  background:
    linear-gradient(90deg, rgba(143, 255, 231, 0.07), transparent 45%),
    rgba(255, 255, 255, 0.04);
}

.platform-map span {
  grid-row: span 2;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 72px;
  border: 1px solid rgba(143, 255, 231, 0.24);
  color: #8fffe7;
  background: rgba(143, 255, 231, 0.07);
  font-size: 13px;
  font-weight: 900;
}

.platform-map strong {
  color: #ffffff;
  font-size: 20px;
  line-height: 1.25;
}

.platform-map p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
}

.split-section {
  grid-template-columns: minmax(0, 1fr) minmax(340px, 0.74fr);
  align-items: start;
  border-top: 1px solid rgba(217, 255, 247, 0.14);
}

.optimization-section {
  border-top: 1px solid rgba(217, 255, 247, 0.14);
}

.section-heading {
  display: grid;
  gap: 8px;
}

.optimization-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid rgba(202, 255, 243, 0.18);
  background: rgba(202, 255, 243, 0.18);
}

.open-source-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-color: rgba(143, 255, 231, 0.2);
  background: rgba(143, 255, 231, 0.2);
}

.optimization-grid article {
  min-height: 220px;
  padding: clamp(20px, 2.8vw, 34px);
  background: #08110f;
}

.open-source-grid article {
  min-height: 250px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background:
    radial-gradient(circle at 100% 0%, rgba(143, 255, 231, 0.1), transparent 34%),
    #08110f;
}

.status-pill {
  width: fit-content;
  min-height: 26px;
  display: inline-flex;
  align-items: center;
  padding: 0 10px;
  border: 1px solid rgba(143, 255, 231, 0.28);
  border-radius: 999px;
  color: #8fffe7;
  background: rgba(143, 255, 231, 0.08);
  font-size: 12px;
  font-weight: 900;
}

.optimization-grid strong {
  display: block;
  color: #ffffff;
  font-size: 21px;
  font-weight: 900;
}

.open-source-grid strong {
  margin-top: 20px;
  font-size: 24px;
  line-height: 1.2;
}

.optimization-grid p {
  margin-top: 16px;
  font-size: 15px;
  line-height: 1.75;
}

.open-source-grid p {
  margin-bottom: 0;
}

.faculty-section {
  grid-template-columns: minmax(0, 0.9fr) minmax(340px, 0.56fr);
  align-items: start;
  border-top: 1px solid rgba(217, 255, 247, 0.14);
  padding-bottom: clamp(80px, 11vw, 140px);
}

.faculty-section ul {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.faculty-section li {
  display: grid;
  gap: 6px;
  padding: 18px;
  border: 1px solid rgba(202, 255, 243, 0.18);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.045);
}

.faculty-section strong {
  color: #ffffff;
  font-size: 18px;
  font-weight: 900;
}

.faculty-section span {
  color: rgba(244, 255, 252, 0.72);
  line-height: 1.6;
}

.site-footer {
  position: relative;
  display: flex;
  align-items: stretch;
  width: 100%;
  margin: 0;
  padding: clamp(56px, 7vw, 88px) clamp(20px, 5vw, 72px) clamp(28px, 4vw, 44px);
  color: #07110f;
  background: #f5f7f6;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 1px;
  background: linear-gradient(90deg, rgba(255, 55, 210, 0.68), #0f8f7b 52%, rgba(15, 143, 123, 0.18));
}

.footer-inner {
  width: min(1180px, 100%);
  margin: 0 auto;
}

.footer-brand-block {
  display: grid;
  gap: 8px;
  margin-bottom: clamp(42px, 6vw, 76px);
}

.footer-brand-block strong {
  color: #07110f;
  font-size: 18px;
  font-weight: 900;
}

.footer-brand-block p {
  margin: 0;
  color: #52615d;
  font-size: 14px;
  font-weight: 700;
}

.footer-directory {
  display: grid;
  grid-template-columns: repeat(4, minmax(120px, 1fr));
  gap: clamp(28px, 4vw, 72px);
  align-items: start;
}

.footer-column h2 {
  margin: 0 0 18px;
  color: #7b8985;
  font-size: 14px;
  line-height: 1.2;
  font-weight: 800;
}

.footer-column ul {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-link {
  color: #07110f;
  font-size: 15px;
  line-height: 1.35;
  font-weight: 900;
  text-decoration: none;
}

.footer-link:hover,
.footer-link:focus-visible {
  color: #087f6e;
  text-decoration: none;
}

.footer-contact-item {
  position: relative;
  width: fit-content;
}

.footer-contact-popover {
  position: absolute;
  left: 0;
  bottom: calc(100% + 12px);
  z-index: 4;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 8px 14px;
  width: max-content;
  max-width: min(360px, calc(100vw - 40px));
  padding: 16px 18px;
  color: #f6fffd;
  background: #07110f;
  box-shadow: 0 12px 34px rgba(5, 8, 7, 0.2);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition:
    opacity 180ms ease,
    transform 220ms ease;
}

.footer-contact-item:hover .footer-contact-popover,
.footer-contact-item:focus-within .footer-contact-popover {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.footer-contact-popover span {
  color: rgba(246, 255, 253, 0.58);
  font-size: 12px;
  font-weight: 800;
}

.footer-contact-popover strong,
.footer-contact-popover a {
  color: #8fffe7;
  font-size: 15px;
  font-weight: 900;
  text-decoration: none;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-top: clamp(46px, 6vw, 72px);
  color: #5e6a67;
  font-size: 13px;
  font-weight: 800;
}

.footer-bottom a {
  color: #07110f;
  text-decoration: none;
}

.footer-socials {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.footer-social-item {
  position: relative;
  display: inline-flex;
}

.footer-social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  color: #07110f;
  border-radius: 999px;
  transition:
    color 180ms ease,
    background 180ms ease,
    transform 180ms ease;
}

.footer-social-link svg {
  width: 19px;
  height: 19px;
  fill: currentColor;
}

.footer-social-link:hover,
.footer-social-link:focus-visible {
  color: #087f6e;
  background: rgba(8, 127, 110, 0.08);
  transform: translateY(-1px);
}

.footer-email-popover {
  position: absolute;
  right: 50%;
  bottom: calc(100% + 12px);
  z-index: 8;
  display: grid;
  gap: 8px;
  width: max-content;
  max-width: min(320px, calc(100vw - 36px));
  padding: 14px 16px;
  color: #f6fffd;
  background: #07110f;
  border-radius: 10px;
  box-shadow: 0 12px 30px rgba(5, 8, 7, 0.18);
  opacity: 0;
  pointer-events: none;
  transform: translate(50%, 8px);
  transition:
    opacity 180ms ease,
    transform 220ms ease;
}

.footer-social-item:hover .footer-email-popover,
.footer-social-item:focus-within .footer-email-popover {
  opacity: 1;
  pointer-events: auto;
  transform: translate(50%, 0);
}

.footer-email-popover span {
  color: rgba(246, 255, 253, 0.58);
  font-size: 12px;
  font-weight: 800;
}

.footer-email-popover a {
  color: #8fffe7;
  font-size: 14px;
  font-weight: 900;
  text-decoration: none;
}

@keyframes stage-drift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(-20px, 16px, 0) scale(1.035); }
}

@keyframes grid-flow {
  from { background-position: 0 0, 0 0; }
  to { background-position: 0 176px, 176px 0; }
}

@keyframes lightbar-pass {
  0%, 100% { opacity: 0.16; transform: translateX(calc(var(--beam-shift) - 8%)) rotate(-8.5deg); }
  50% { opacity: 0.82; transform: translateX(calc(var(--beam-shift) + 8%)) rotate(-8.5deg); }
}

@keyframes card-float {
  from { translate: 0 0; }
  to { translate: -18px 18px; }
}

@keyframes receipt-float {
  from { translate: 0 0; }
  to { translate: 22px -16px; }
}

@keyframes source-float {
  from { translate: 0 0; }
  to { translate: 14px 12px; }
}

@keyframes scan-pass {
  from { top: 10%; opacity: 0; }
  12% { opacity: 1; }
  86% { opacity: 1; }
  to { top: 88%; opacity: 0; }
}

@keyframes pulse-line {
  0%, 100% { opacity: 0.32; transform: scaleX(0.72); }
  50% { opacity: 1; transform: scaleX(1); }
}

@media (max-width: 1080px) {
  .landing-nav nav {
    display: none;
  }

  .landing-hero {
    min-height: 1180px;
    align-items: start;
    padding-top: 108px;
  }

  .cinematic-stage {
    top: 410px;
    bottom: auto;
    height: 700px;
    opacity: 0.9;
  }

  .dashboard-panel {
    top: 36px;
    right: -16%;
    width: 560px;
    opacity: 0.86;
  }

  .voucher-panel {
    right: 7%;
    bottom: 150px;
    width: 420px;
  }

  .assessment-panel {
    top: 250px;
    right: 2%;
    width: 320px;
  }

  .source-panel {
    display: none;
  }

  .receipt-frame {
    top: 120px;
    right: 50%;
    width: 225px;
  }

  .hero-metrics {
    position: relative;
    left: 50%;
    right: auto;
    bottom: auto;
    margin-top: 16px;
    width: 100vw;
    transform: translateX(-50%);
  }

  .hero-copy {
    margin-left: 0;
    padding-bottom: 630px;
  }

  .split-section,
  .platform-section,
  .faculty-section {
    grid-template-columns: 1fr;
  }

  .optimization-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-directory {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .landing-nav {
    padding: 16px 18px;
  }

  .landing-brand-text strong {
    font-size: 14px;
  }

  .landing-brand-text em {
    display: none;
  }

  .landing-hero {
    min-height: 1120px;
    align-items: start;
    padding: 96px 18px 26px;
  }

  .cinematic-stage {
    top: 410px;
    bottom: auto;
    height: 620px;
    opacity: 0.82;
  }

  .hero-copy h1 {
    font-size: clamp(29px, 8.2vw, 40px);
  }

  .hero-copy {
    padding-bottom: 620px;
  }

  .hero-lede {
    font-size: 16px;
  }

  .dashboard-panel {
    display: none;
  }

  .voucher-panel {
    right: auto;
    left: 18px;
    bottom: 126px;
    width: calc(100vw - 36px);
  }

  .ledger-row {
    grid-template-columns: 34px 1fr 82px;
    padding: 8px 9px;
  }

  .assessment-panel {
    top: auto;
    right: auto;
    left: 28px;
    bottom: 6px;
    width: calc(100vw - 56px);
  }

  .receipt-frame {
    top: 20px;
    left: auto;
    right: 24px;
    width: 164px;
  }

  .source-panel,
  .ipa-flow {
    display: none;
  }

  .hero-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    left: 50%;
    width: 100vw;
    transform: translateX(-50%);
  }

  .impact-metric:nth-child(odd) {
    border-left: 0;
  }

  .impact-metric:nth-child(n+3) {
    border-top: 1px solid rgba(214, 255, 246, 0.14);
  }

  .optimization-grid {
    grid-template-columns: 1fr;
  }

  .site-footer {
    padding-left: 18px;
    padding-right: 18px;
  }

  .footer-directory {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .footer-brand-block {
    margin-bottom: 54px;
  }

  .footer-bottom {
    align-items: center;
    flex-direction: row;
    justify-content: space-between;
    margin-top: 60px;
  }

  .footer-contact-popover {
    position: static;
    width: 100%;
    max-height: 0;
    padding: 0;
    overflow: hidden;
    box-shadow: none;
    opacity: 0;
    transform: none;
  }

  .footer-contact-item:hover .footer-contact-popover,
  .footer-contact-item:focus-within .footer-contact-popover {
    max-height: 120px;
    margin-top: 10px;
    padding: 14px 16px;
    opacity: 1;
  }

  .footer-contact-item {
    width: 100%;
  }

  .footer-column ul {
    gap: 13px;
  }

  .platform-map article {
    grid-template-columns: 1fr;
  }

  .platform-map span {
    grid-row: auto;
    min-height: 42px;
    justify-content: flex-start;
    padding: 0 12px;
  }

  .optimization-grid article {
    min-height: auto;
  }
}

@media (hover: none) {
  .footer-contact-popover {
    position: static;
    width: 100%;
    max-height: 120px;
    margin-top: 10px;
    padding: 14px 16px;
    overflow: visible;
    opacity: 1;
    transform: none;
    box-shadow: none;
  }
}

.landing-page.force-reduced-motion .cinematic-stage,
.landing-page.force-reduced-motion .stage-grid,
.landing-page.force-reduced-motion .stage-beam,
.landing-page.force-reduced-motion .dashboard-panel,
.landing-page.force-reduced-motion .voucher-panel,
.landing-page.force-reduced-motion .assessment-panel,
.landing-page.force-reduced-motion .source-panel,
.landing-page.force-reduced-motion .receipt-frame,
.landing-page.force-reduced-motion .scan-line,
.landing-page.force-reduced-motion .ipa-flow i {
  animation: none;
}

.landing-page.force-reduced-motion .scene-panel,
.landing-page.force-reduced-motion .receipt-frame,
.landing-page.force-reduced-motion .ipa-flow,
.landing-page.force-reduced-motion .footer-contact-popover {
  transition: none;
}

/* Homepage UI refinement: keep copy intact, improve visual hierarchy and rhythm. */
.landing-page {
  background:
    radial-gradient(circle at 12% 14%, rgba(143, 255, 231, 0.12), transparent 28%),
    radial-gradient(circle at 88% 36%, rgba(14, 104, 89, 0.18), transparent 30%),
    #050807;
}

.landing-nav {
  border-bottom: 1px solid rgba(214, 255, 246, 0.07);
  background: linear-gradient(180deg, rgba(5, 8, 7, 0.88), rgba(5, 8, 7, 0.48) 72%, rgba(5, 8, 7, 0));
}

.landing-nav nav a {
  position: relative;
  min-height: 34px;
  display: inline-flex;
  align-items: center;
}

.landing-nav nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  height: 2px;
  border-radius: 999px;
  background: #8fffe7;
  opacity: 0;
  transform: scaleX(0.34);
  transition:
    opacity 160ms ease,
    transform 180ms ease;
}

.landing-nav nav a:hover::after,
.landing-nav nav a:focus-visible::after {
  opacity: 1;
  transform: scaleX(1);
}

.landing-hero {
  min-height: 104svh;
}

.teaching-hero::before {
  background:
    linear-gradient(90deg, rgba(5, 8, 7, 0.99) 0%, rgba(5, 8, 7, 0.9) 40%, rgba(5, 8, 7, 0.56) 66%, rgba(5, 8, 7, 0.92) 100%),
    radial-gradient(circle at 26% 46%, rgba(143, 255, 231, 0.16), transparent 32%),
    linear-gradient(180deg, rgba(5, 8, 7, 0.06) 0%, #050807 100%);
}

.hero-copy {
  max-width: 660px;
  margin-left: clamp(18px, 5vw, 92px);
  padding-bottom: clamp(168px, 21vh, 230px);
}

.hero-copy h1 {
  max-width: min(900px, calc(100vw - 48px));
  font-size: clamp(40px, 4.7vw, 64px);
  line-height: 1.06;
  white-space: nowrap;
}

.hero-lede {
  max-width: 620px;
  color: rgba(245, 255, 252, 0.82);
}

.hero-actions {
  margin-top: 30px;
}

.hero-primary,
.hero-secondary {
  min-width: 112px;
}

.dashboard-panel {
  top: 12.5%;
  right: 5.6%;
  width: min(500px, 36vw);
}

.assessment-panel {
  top: 40%;
  right: 6.5%;
}

.voucher-panel {
  top: 63%;
  right: 8.5%;
}

.source-panel {
  top: 52.5%;
  right: 26.5%;
  width: min(240px, 16.5vw);
}

.receipt-frame {
  top: 39%;
  right: 32.5%;
  width: min(136px, 9.5vw);
}

.hero-metrics {
  min-height: 138px;
  align-items: stretch;
}

.impact-metric {
  padding: clamp(18px, 1.8vw, 24px) clamp(26px, 4vw, 76px);
}

.impact-metric strong {
  font-size: clamp(30px, 3vw, 48px);
}

.landing-section {
  width: min(1220px, calc(100vw - 56px));
  padding: clamp(76px, 9vw, 124px) 0;
}

.landing-section h2 {
  max-width: 920px;
}

.landing-section p {
  color: rgba(244, 255, 252, 0.8);
}

.section-heading {
  max-width: 980px;
}

.platform-section,
.optimization-section,
.faculty-section {
  position: relative;
}

.platform-section::before,
.optimization-section::before,
.faculty-section::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: min(220px, 42vw);
  height: 1px;
  background: linear-gradient(90deg, #8fffe7, rgba(143, 255, 231, 0));
}

.platform-section {
  grid-template-columns: minmax(0, 0.82fr) minmax(500px, 1fr);
  gap: clamp(36px, 5vw, 72px);
}

.platform-map {
  gap: 10px;
}

.platform-map article {
  border-radius: 8px;
  background:
    linear-gradient(90deg, rgba(143, 255, 231, 0.075), rgba(255, 255, 255, 0.035)),
    rgba(255, 255, 255, 0.025);
}

.platform-map span {
  border-radius: 6px;
}

.optimization-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  border: 0;
  background: transparent;
}

.optimization-grid article {
  min-height: 238px;
  border: 1px solid rgba(202, 255, 243, 0.16);
  border-radius: 8px;
  background:
    radial-gradient(circle at 100% 0%, rgba(143, 255, 231, 0.08), transparent 36%),
    #08110f;
}

.optimization-grid strong {
  margin-top: 22px;
  line-height: 1.25;
}

.faculty-section {
  grid-template-columns: minmax(0, 0.82fr) minmax(360px, 0.62fr);
  gap: clamp(38px, 5vw, 78px);
}

.faculty-section li {
  border-radius: 8px;
  background:
    linear-gradient(90deg, rgba(143, 255, 231, 0.06), rgba(255, 255, 255, 0.035)),
    rgba(255, 255, 255, 0.02);
}

.effect-comparison {
  grid-column: 1 / -1;
  margin-top: 36px;
  border: 1px solid rgba(202, 255, 243, 0.18);
  border-radius: 10px;
  padding: clamp(22px, 3vw, 32px);
  background:
    linear-gradient(135deg, rgba(143, 255, 231, 0.06), rgba(255, 255, 255, 0.025)),
    rgba(255, 255, 255, 0.025);
}

.effect-comparison-title {
  margin: 0 0 18px;
  color: #8fffe7;
  font-size: 14px;
  font-weight: 900;
}

.comparison-table {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) repeat(2, minmax(160px, 0.78fr));
  overflow: hidden;
  border: 1px solid rgba(202, 255, 243, 0.16);
  border-radius: 8px;
  background: rgba(202, 255, 243, 0.16);
  gap: 1px;
}

.comparison-cell {
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px 16px;
  color: rgba(244, 255, 252, 0.74);
  background: #08110f;
  font-size: 14px;
  line-height: 1.35;
  text-align: center;
}

.comparison-cell.is-header {
  min-height: 58px;
  color: rgba(244, 255, 252, 0.72);
  background: #07110f;
  font-size: 13px;
  font-weight: 900;
}

.comparison-cell.is-header span {
  color: rgba(244, 255, 252, 0.5);
  font-size: 11px;
}

.comparison-cell.is-label {
  justify-content: flex-start;
  color: #f6fffd;
  font-weight: 800;
  text-align: left;
}

.comparison-cell.is-after {
  color: #8fffe7;
  font-weight: 900;
}

.comparison-cell.is-warning {
  color: #f0d98c;
}

.comparison-note {
  max-width: 780px;
  margin: 14px auto 0;
  color: rgba(244, 255, 252, 0.52);
  font-size: 12px;
  line-height: 1.7;
  text-align: center;
}

@media (max-width: 1080px) {
  .hero-copy {
    margin-left: 0;
  }

  .platform-section,
  .faculty-section {
    grid-template-columns: 1fr;
  }

  .platform-map {
    width: 100%;
  }

  .hero-copy {
    padding-bottom: 620px;
  }

  .optimization-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .effect-comparison {
    margin-top: 26px;
  }
}

@media (max-width: 720px) {
  .landing-page {
    background:
      radial-gradient(circle at 18% 7%, rgba(143, 255, 231, 0.14), transparent 32%),
      #050807;
  }

  .landing-hero {
    min-height: 1130px;
  }

  .hero-copy h1 {
    font-size: clamp(29px, 8.2vw, 40px);
    line-height: 1.08;
  }

  .hero-copy {
    width: 100%;
    max-width: none;
    margin-left: 0;
    padding-bottom: 610px;
  }

  .hero-lede {
    max-width: none;
    line-height: 1.74;
  }

  .hero-metrics {
    left: 0;
    right: 0;
    width: auto;
    transform: none;
  }

  .impact-metric {
    padding: 18px 20px;
  }

  .landing-section {
    width: min(100% - 36px, 1220px);
  }

  .optimization-grid {
    grid-template-columns: 1fr;
  }

  .comparison-table {
    grid-template-columns: 1fr;
  }

  .comparison-cell {
    min-height: 44px;
    justify-content: flex-start;
    text-align: left;
  }

  .comparison-cell.is-header {
    min-height: 46px;
    background: rgba(143, 255, 231, 0.08);
  }
}

/* Native long-scroll narrative */
html {
  scroll-behavior: smooth;
}

.landing-main {
  overflow-x: clip;
  overflow-y: visible;
}

.landing-slide {
  min-height: 100svh;
  transform: translate3d(0, 0, 0);
}

.landing-slide .slide-copy,
.landing-slide .platform-interactive,
.landing-slide .optimization-lab,
.landing-slide .teaching-loop,
.landing-slide .effect-comparison {
  opacity: 0;
  transform: translateY(36px);
  transition:
    opacity 700ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 800ms cubic-bezier(0.16, 1, 0.3, 1);
}

.landing-slide.is-active .slide-copy,
.landing-slide.is-active .platform-interactive,
.landing-slide.is-active .optimization-lab,
.landing-slide.is-active .teaching-loop,
.landing-slide.is-active .effect-comparison {
  opacity: 1;
  transform: translateY(0);
}

.landing-slide.is-active .platform-interactive,
.landing-slide.is-active .optimization-lab,
.landing-slide.is-active .teaching-loop {
  transition-delay: 120ms;
}

.platform-section,
.optimization-section,
.faculty-section {
  width: min(1240px, calc(100vw - 72px));
  min-height: 100svh;
  align-content: center;
  padding: 112px 0 72px;
}

.platform-section {
  grid-template-columns: minmax(0, 0.78fr) minmax(520px, 1fr);
  gap: clamp(40px, 6vw, 92px);
}

.platform-interactive {
  display: grid;
  gap: 18px;
}

.migration-board {
  display: grid;
  grid-template-columns: auto 1fr auto 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 16px;
  border: 1px solid rgba(202, 255, 243, 0.16);
  border-radius: 12px;
  background:
    linear-gradient(135deg, rgba(143, 255, 231, 0.08), rgba(255, 255, 255, 0.025)),
    rgba(255, 255, 255, 0.025);
}

.migration-board span {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 12px;
  border: 1px solid rgba(143, 255, 231, 0.28);
  border-radius: 999px;
  color: #dffff8;
  background: rgba(143, 255, 231, 0.08);
  font-size: 13px;
  font-weight: 900;
}

.migration-board i,
.model-pipeline i,
.teaching-orbit i {
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(143, 255, 231, 0.16), #8fffe7, rgba(143, 255, 231, 0.16));
  animation: pulse-line 1.9s ease-in-out infinite;
}

.platform-map {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.platform-map article,
.lab-modules article,
.teaching-steps li {
  cursor: pointer;
  outline: none;
  transition:
    border-color 180ms ease,
    background 180ms ease,
    transform 180ms ease;
}

.platform-map article {
  position: relative;
  grid-template-columns: 84px minmax(0, 1fr);
  min-height: 128px;
  border-color: rgba(202, 255, 243, 0.16);
}

.platform-map article:hover,
.platform-map article:focus-visible,
.platform-map article.is-selected,
.lab-modules article:hover,
.lab-modules article:focus-visible,
.lab-modules article.is-selected,
.teaching-steps li:hover,
.teaching-steps li:focus-visible,
.teaching-steps li.is-selected {
  border-color: rgba(143, 255, 231, 0.58);
  background:
    linear-gradient(135deg, rgba(143, 255, 231, 0.13), rgba(255, 255, 255, 0.04)),
    rgba(255, 255, 255, 0.035);
  transform: translateY(-2px);
}

.platform-signal-panel {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.platform-signal-panel div {
  display: grid;
  gap: 6px;
  min-height: 88px;
  align-content: center;
  padding: 14px;
  border: 1px solid rgba(202, 255, 243, 0.14);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.025);
}

.platform-signal-panel span {
  color: rgba(244, 255, 252, 0.52);
  font-size: 12px;
  font-weight: 800;
}

.platform-signal-panel strong {
  color: #8fffe7;
  font-size: 19px;
  font-weight: 900;
}

.optimization-section {
  grid-template-columns: minmax(0, 0.58fr) minmax(700px, 1fr);
  gap: clamp(30px, 4vw, 64px);
  align-items: center;
  padding-top: 92px;
  padding-bottom: 42px;
}

.optimization-section .section-heading h2 {
  max-width: 520px;
  font-size: clamp(38px, 4.1vw, 58px);
  line-height: 1.04;
}

.optimization-section .section-heading h2 span {
  display: block;
  white-space: nowrap;
}

.optimization-section .section-heading p {
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.72;
}

.optimization-lab {
  display: grid;
  grid-template-columns: minmax(250px, 0.46fr) minmax(450px, 0.78fr);
  gap: 14px;
  align-items: stretch;
}

.lab-modules {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  align-content: start;
}

.lab-modules article {
  min-height: 0;
  padding: 12px 13px;
}

.lab-modules article p {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  clip-path: inset(50%);
}

.lab-modules article strong {
  display: block;
  margin-top: 8px;
  font-size: 16px;
  line-height: 1.2;
}

.lab-console {
  display: grid;
  align-content: start;
  gap: 11px;
  min-height: 100%;
  padding: 16px;
  border: 1px solid rgba(143, 255, 231, 0.22);
  border-radius: 12px;
  background:
    radial-gradient(circle at 100% 0%, rgba(143, 255, 231, 0.14), transparent 38%),
    rgba(255, 255, 255, 0.035);
}

.lab-console-title,
.teaching-live-title {
  color: #ffffff;
  font-size: 21px;
  line-height: 1.18;
  font-weight: 900;
}

.lab-console-text,
.teaching-live-text {
  margin: 0;
  color: rgba(244, 255, 252, 0.74);
  font-size: 13px;
  line-height: 1.55;
}

.model-pipeline {
  display: grid;
  grid-template-columns: auto 1fr auto 1fr auto 1fr auto;
  align-items: center;
  gap: 8px;
  padding: 10px;
  border: 1px solid rgba(202, 255, 243, 0.14);
  border-radius: 10px;
  background: rgba(5, 8, 7, 0.34);
}

.model-pipeline span,
.teaching-orbit span {
  color: #dffff8;
  font-size: 12px;
  font-weight: 900;
}

.lab-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.lab-metrics div {
  display: grid;
  align-content: center;
  gap: 4px;
  min-height: 48px;
  padding: 7px 9px;
  border: 1px solid rgba(202, 255, 243, 0.14);
  border-radius: 8px;
  background: rgba(5, 8, 7, 0.26);
}

.lab-metrics span {
  color: rgba(244, 255, 252, 0.58);
  font-size: 11px;
  font-weight: 800;
}

.lab-metrics strong {
  color: #8fffe7;
  font-size: 18px;
  font-weight: 900;
}

.lab-console .effect-comparison {
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
}

.lab-console .effect-comparison-title {
  margin-bottom: 8px;
}

.lab-console .comparison-table {
  grid-template-columns: minmax(122px, 1fr) minmax(84px, 0.68fr) minmax(98px, 0.74fr);
}

.lab-console .comparison-cell {
  min-height: 28px;
  padding: 5px 8px;
  font-size: 11px;
}

.lab-console .comparison-cell.is-header {
  min-height: 34px;
  font-size: 11px;
}

.lab-console .comparison-note {
  margin-top: 8px;
  font-size: 10.5px;
  line-height: 1.45;
}

.faculty-section {
  grid-template-columns: minmax(0, 0.72fr) minmax(560px, 1fr);
  grid-template-areas:
    "copy loop";
  gap: clamp(34px, 5vw, 78px);
  align-items: center;
  padding-top: 98px;
  padding-bottom: 64px;
}

.faculty-section > .slide-copy {
  grid-area: copy;
  align-self: center;
}

.teaching-loop {
  grid-area: loop;
  display: grid;
  grid-template-columns: minmax(240px, 0.76fr) minmax(270px, 1fr);
  gap: 14px;
  align-items: stretch;
}

.teaching-steps {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.teaching-live-panel {
  display: grid;
  align-content: start;
  gap: 14px;
  padding: 20px;
  border: 1px solid rgba(143, 255, 231, 0.22);
  border-radius: 12px;
  background:
    radial-gradient(circle at 100% 0%, rgba(143, 255, 231, 0.14), transparent 38%),
    rgba(255, 255, 255, 0.035);
}

.teaching-orbit {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}

.teaching-orbit i {
  width: 2px;
  height: 20px;
  justify-self: center;
}

.teaching-orbit span {
  min-height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(202, 255, 243, 0.14);
  border-radius: 999px;
  background: rgba(5, 8, 7, 0.28);
}

@media (max-width: 1180px) {
  .optimization-section,
  .faculty-section {
    grid-template-columns: 1fr;
  }

  .faculty-section {
    grid-template-areas:
      "copy"
      "loop";
  }
}

@media (max-width: 860px) {
  .landing-slide {
    min-height: auto;
  }

  .landing-slide .slide-copy,
  .landing-slide .platform-interactive,
  .landing-slide .optimization-lab,
  .landing-slide .teaching-loop,
  .landing-slide .effect-comparison {
    opacity: 1;
    transform: none;
  }

  .platform-section,
  .optimization-section,
  .faculty-section {
    width: min(100% - 36px, 1240px);
    min-height: auto;
    padding: 76px 0;
  }

  .migration-board,
  .model-pipeline {
    grid-template-columns: 1fr;
  }

  .migration-board i,
  .model-pipeline i {
    width: 2px;
    height: 20px;
    justify-self: center;
  }

  .platform-signal-panel,
  .optimization-lab,
  .lab-modules,
  .teaching-loop {
    grid-template-columns: 1fr;
  }
}

.landing-page.force-reduced-motion .landing-slide .slide-copy,
.landing-page.force-reduced-motion .landing-slide .platform-interactive,
.landing-page.force-reduced-motion .landing-slide .optimization-lab,
.landing-page.force-reduced-motion .landing-slide .teaching-loop,
.landing-page.force-reduced-motion .landing-slide .effect-comparison {
  transform: none;
  transition: opacity 180ms ease-out;
}

.landing-page.force-reduced-motion .platform-map article,
.landing-page.force-reduced-motion .lab-modules article,
.landing-page.force-reduced-motion .teaching-steps li {
  transition: none;
}
.landing-page .landing-nav {
  color: #111816;
  background: rgba(255, 255, 255, 0.84);
  border-bottom: 1px solid rgba(12, 18, 16, 0.08);
  backdrop-filter: blur(18px);
}
.landing-page .landing-nav nav a {
  color: rgba(17, 24, 22, 0.74);
}
.landing-page .landing-brand-text em {
  color: rgba(17, 24, 22, 0.58);
}

.landing-page {
  color: #111816;
  background: #f7f7f4;
}

#landing-title {
  scroll-margin-top: 156px;
}

.landing-page .teaching-hero::before {
  background:
    linear-gradient(90deg, rgba(247, 247, 244, 0.98) 0%, rgba(247, 247, 244, 0.86) 38%, rgba(247, 247, 244, 0.38) 66%, rgba(247, 247, 244, 0.92) 100%),
    radial-gradient(circle at 30% 48%, rgba(32, 198, 178, 0.16), transparent 32%),
    linear-gradient(180deg, rgba(247, 247, 244, 0.04) 0%, #f7f7f4 100%);
}

.landing-page .landing-hero::after {
  background: linear-gradient(180deg, rgba(247, 247, 244, 0) 0%, #f7f7f4 82%);
}

.landing-page .hero-copy h1,
.landing-page .landing-section h2 {
  color: #111816;
}

.landing-page .hero-lede,
.landing-page .landing-section p {
  color: rgba(17, 24, 22, 0.72);
}

.landing-page .hero-secondary {
  color: #111816;
  border-color: rgba(17, 24, 22, 0.2);
  background: rgba(255, 255, 255, 0.72);
}

.landing-page .hero-metrics {
  background:
    radial-gradient(circle at 8% 0%, rgba(32, 198, 178, 0.14), transparent 24%),
    linear-gradient(90deg, rgba(255, 255, 255, 0.94), rgba(242, 248, 246, 0.96));
}

.landing-page .impact-metric {
  border-left-color: rgba(17, 24, 22, 0.1);
}

.landing-page .impact-metric strong,
.landing-page .impact-label {
  color: #111816;
}

.landing-page .impact-note {
  color: rgba(17, 24, 22, 0.66);
}

.platform-section.light-story-section {
  width: 100%;
  grid-template-columns: minmax(300px, 410px) minmax(560px, 780px);
  justify-content: center;
  gap: clamp(34px, 4.8vw, 68px);
  padding: clamp(112px, 10vw, 148px) clamp(28px, 5vw, 76px) clamp(84px, 8vw, 120px);
  color: #111816;
  background: #f7f7f4;
  border-top: 0;
}

.platform-section.light-story-section::before {
  display: none;
}

.light-story-section .landing-label {
  color: #0b7c6c;
}

.light-story-section h2 {
  color: #111816;
  max-width: 11em;
  font-size: clamp(38px, 4vw, 58px);
  line-height: 1.05;
}

.light-story-section p {
  max-width: 48ch;
  color: rgba(17, 24, 22, 0.72);
}

.openai-style-showcase {
  display: grid;
  grid-template-columns: minmax(176px, 230px) minmax(0, 1fr);
  gap: clamp(18px, 2.4vw, 28px);
  align-items: center;
  align-self: center;
  min-width: 0;
}

.showcase-tabs {
  display: grid;
  gap: 0;
  margin-top: 0;
}

.showcase-tabs button {
  display: grid;
  gap: 7px;
  width: 100%;
  min-height: 78px;
  padding: 16px 0;
  border: 0;
  border-top: 1px solid rgba(17, 24, 22, 0.14);
  color: #111816;
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.showcase-tabs button:last-child {
  border-bottom: 1px solid rgba(17, 24, 22, 0.14);
}

.showcase-tabs button span {
  display: block;
  grid-row: auto;
  min-height: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  color: rgba(17, 24, 22, 0.56);
  background: transparent;
  font-size: 13px;
  font-weight: 800;
}

.showcase-tabs button strong {
  color: #111816;
  font-size: 18px;
  line-height: 1.2;
  font-weight: 900;
}

.showcase-tabs button p {
  margin: 0;
  color: rgba(17, 24, 22, 0.64);
  font-size: 13px;
  line-height: 1.58;
}

.showcase-tabs button:not(.is-selected) p {
  display: none;
}

.showcase-tabs button.is-selected {
  min-height: 132px;
}

.showcase-tabs button.is-selected,
.showcase-tabs button:hover,
.showcase-tabs button:focus-visible {
  outline: none;
  background: linear-gradient(90deg, rgba(32, 198, 178, 0.1), transparent 72%);
}

.showcase-tabs button.is-selected strong {
  color: #086f62;
}

.story-frame {
  position: relative;
  min-height: clamp(410px, 52vh, 570px);
  overflow: hidden;
  border-radius: 10px;
  background: #dff3fb;
  box-shadow: inset 0 0 0 1px rgba(17, 24, 22, 0.08);
}

.story-slide {
  position: absolute;
  inset: 0;
  overflow: hidden;
  opacity: 0;
  transform: scale(1.015);
  transition:
    opacity 520ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 680ms cubic-bezier(0.16, 1, 0.3, 1);
}

.story-slide.is-selected {
  opacity: 1;
  transform: scale(1);
}

.story-paint {
  position: absolute;
  inset: 0;
  filter: saturate(1.08);
}

.paint-field {
  position: absolute;
  border-radius: 42%;
  filter: blur(12px);
  opacity: 0.86;
}

.paint-cyan { inset: -8% 46% -18% -14%; background: #21a7e8; }
.paint-lime { width: 52%; height: 68%; right: -9%; top: 2%; background: #e8f6a0; }
.paint-blue { width: 62%; height: 34%; right: 9%; bottom: -8%; background: #9fd7ff; }
.paint-yellow { inset: -10% 48% -16% -12%; background: #fff0a6; }
.paint-mint { width: 62%; height: 82%; right: -12%; top: -4%; background: #94f0cf; }
.paint-sky { width: 66%; height: 42%; left: 32%; bottom: -12%; background: #90c9ff; }
.paint-violet { inset: -8% 54% -12% -12%; background: #9a83ff; }
.paint-teal { width: 64%; height: 76%; right: -10%; top: 0; background: #70ecd9; }
.paint-rose { width: 46%; height: 44%; left: 35%; bottom: -12%; background: #ffb6cd; }

.story-receipt {
  position: absolute;
  left: 8%;
  top: 18%;
  width: min(260px, 32%);
  margin: 0;
  overflow: hidden;
  border-radius: 10px;
  box-shadow: 0 18px 42px rgba(17, 24, 22, 0.18);
}

.story-receipt img {
  display: block;
  width: 100%;
  filter: saturate(0.88) contrast(0.92);
}

.story-receipt span {
  position: absolute;
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 8px;
  color: #f8fffd;
  background: rgba(8, 111, 98, 0.82);
  font-size: 12px;
  font-weight: 900;
}

.story-receipt span:nth-of-type(1) { left: 18%; top: 26%; }
.story-receipt span:nth-of-type(2) { right: 14%; top: 38%; }
.story-receipt span:nth-of-type(3) { left: 30%; bottom: 18%; }

.story-card,
.story-dashboard,
.story-code-window {
  position: absolute;
  color: #111816;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(17, 24, 22, 0.12);
  border-radius: 10px;
  box-shadow: 0 18px 46px rgba(17, 24, 22, 0.12);
  backdrop-filter: blur(16px);
}

.story-card-main {
  right: 7%;
  bottom: 9%;
  width: min(420px, 50%);
  padding: 24px;
}

.story-card-float {
  right: 8%;
  bottom: 10%;
  width: min(360px, 46%);
  padding: 22px;
}

.story-card strong,
.story-dashboard strong,
.story-code-window span {
  display: block;
  margin-bottom: 10px;
  color: #111816;
  font-size: 20px;
  font-weight: 900;
}

.story-card p {
  margin: 0;
  color: rgba(17, 24, 22, 0.72);
  font-size: 15px;
  line-height: 1.65;
}

.story-progress {
  display: grid;
  gap: 9px;
  margin-top: 18px;
}

.story-progress span {
  position: relative;
  display: flex;
  justify-content: space-between;
  color: rgba(17, 24, 22, 0.7);
  font-size: 12px;
  font-weight: 800;
}

.story-progress span::after {
  content: "";
  width: var(--w);
  height: 4px;
  align-self: center;
  border-radius: 999px;
  background: #086f62;
}

.story-dashboard {
  left: 9%;
  top: 16%;
  width: min(520px, 58%);
  padding: 26px;
}

.story-kpis {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 16px;
}

.story-kpis span {
  display: grid;
  gap: 5px;
  padding: 14px;
  border: 1px solid rgba(17, 24, 22, 0.1);
  border-radius: 8px;
  background: rgba(247, 247, 244, 0.76);
  color: rgba(17, 24, 22, 0.6);
  font-size: 12px;
  font-weight: 800;
}

.story-kpis b {
  color: #086f62;
  font-size: 28px;
  line-height: 1;
}

.story-bars {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.story-bars i {
  height: 9px;
  border-radius: 999px;
  background: linear-gradient(90deg, #086f62 var(--w), rgba(17, 24, 22, 0.12) var(--w));
}

.story-code-window {
  left: 9%;
  top: 17%;
  width: min(480px, 56%);
  padding: 24px;
}

.story-code-window code {
  display: block;
  padding: 18px;
  border-radius: 8px;
  color: #dffdf6;
  background: #08110f;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 15px;
  line-height: 1.8;
}

@media (max-width: 1180px) {
  .platform-section.light-story-section {
    grid-template-columns: 1fr;
  }

  .openai-style-showcase {
    grid-template-columns: 1fr;
  }

  .showcase-tabs {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1px;
    background: rgba(17, 24, 22, 0.12);
  }

  .showcase-tabs button {
    min-height: 126px;
    padding: 18px;
    border: 0;
    background: #f7f7f4;
  }
}

@media (max-width: 760px) {
  .landing-nav {
    align-items: flex-start;
  }

  .platform-section.light-story-section {
    padding: 86px 18px 62px;
  }

  .showcase-tabs {
    grid-template-columns: 1fr;
  }

  .story-frame {
    min-height: 520px;
  }

  .story-receipt,
  .story-dashboard,
  .story-code-window {
    left: 7%;
    top: 12%;
    width: 66%;
  }

  .story-card-main,
  .story-card-float {
    left: 7%;
    right: 7%;
    bottom: 8%;
    width: auto;
  }
}

/* OpenAI-style neutral typography and light palette refinement */
.landing-page {
  color: var(--oa-ink);
  background: var(--oa-bg);
}

.landing-page .landing-nav{
  color: var(--oa-ink);
  background: rgba(255, 255, 255, 0.92);
  border-bottom-color: var(--oa-soft-line);
}

.landing-page .landing-nav nav a{
  color: var(--oa-muted);
  font-weight: 650;
}

.landing-page .landing-brand-text em{
  color: var(--oa-faint);
}

.landing-page .teaching-hero::before {
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.98) 0%, rgba(255, 255, 255, 0.88) 39%, rgba(255, 255, 255, 0.34) 64%, rgba(255, 255, 255, 0.92) 100%),
    radial-gradient(circle at 30% 48%, rgba(80, 217, 255, 0.12), transparent 33%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.04) 0%, #ffffff 100%);
}

.landing-page .landing-hero::after {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0) 0%, #ffffff 82%);
}

.landing-page .hero-copy h1,
.landing-page .landing-section h2 {
  color: var(--oa-ink);
  font-weight: 760;
  letter-spacing: -0.035em;
}

.landing-page .hero-copy h1 {
  font-size: clamp(38px, 4.2vw, 56px);
  white-space: nowrap;
}

.landing-page .hero-copy {
  max-width: min(650px, 56vw);
}

.landing-page .hero-lede {
  max-width: 42ch;
}

.landing-page .hero-lede,
.landing-page .landing-section p {
  color: var(--oa-muted);
  font-weight: 400;
}

.landing-page .hero-secondary {
  color: var(--oa-ink);
  border-color: var(--oa-line);
  background: rgba(255, 255, 255, 0.82);
}

.landing-page .hero-metrics {
  background: #ffffff;
  border-top-color: var(--oa-line);
  border-bottom-color: rgba(80, 217, 255, 0.62);
}

.landing-page .impact-metric {
  border-left-color: var(--oa-line);
}

.landing-page .impact-metric strong,
.landing-page .impact-label {
  color: var(--oa-ink);
}

.landing-page .impact-note {
  color: var(--oa-muted);
}

.platform-section.light-story-section {
  color: var(--oa-ink);
  background: var(--oa-bg);
}

.light-story-section .landing-label {
  color: var(--oa-accent);
  font-weight: 700;
}

.light-story-section h2 {
  color: var(--oa-ink);
  font-weight: 760;
  letter-spacing: -0.035em;
}

.light-story-section p {
  color: var(--oa-muted);
  line-height: 1.72;
}

.showcase-tabs button {
  border-top-color: var(--oa-line);
  color: var(--oa-ink);
}

.showcase-tabs button:last-child {
  border-bottom-color: var(--oa-line);
}

.showcase-tabs button span {
  color: var(--oa-faint);
  font-weight: 600;
}

.showcase-tabs button strong {
  color: var(--oa-ink);
  font-weight: 720;
  letter-spacing: -0.012em;
}

.showcase-tabs button p {
  color: var(--oa-muted);
}

.showcase-tabs button.is-selected,
.showcase-tabs button:hover,
.showcase-tabs button:focus-visible {
  background: #f1f1f1;
}

.showcase-tabs button.is-selected strong {
  color: var(--oa-ink);
}

.story-frame {
  background: #f1f1f1;
  box-shadow: inset 0 0 0 1px var(--oa-soft-line);
}

.story-card,
.story-dashboard,
.story-code-window {
  border-color: var(--oa-line);
  color: var(--oa-ink);
}

.story-card strong,
.story-dashboard strong {
  color: var(--oa-ink);
  font-weight: 720;
  letter-spacing: -0.012em;
}

.story-card p {
  color: var(--oa-muted);
}

.dashboard-cell,
.story-code-window {
  border-color: var(--oa-line);
}

/* Homepage visual correction: keep the pseudo-3D stage readable on the fixed light page. */
.landing-page .teaching-hero {
  background: #ffffff;
}

.landing-page .cinematic-stage {
  inset: clamp(118px, 13vh, 156px) clamp(58px, 5.8vw, 96px) clamp(112px, 15vh, 154px) auto;
  width: min(720px, 43vw);
  overflow: hidden;
  border: 1px solid var(--oa-line);
  border-radius: 5px;
  background: #f1f1f1;
  box-shadow: none;
  perspective: none;
  transform: none;
  animation: none;
}

.landing-page .stage-grid,
.landing-page .stage-beams,
.landing-page .dashboard-panel,
.landing-page .voucher-panel,
.landing-page .assessment-panel,
.landing-page .receipt-frame,
.landing-page .ipa-flow {
  display: none;
}

.landing-page .source-panel {
  display: block;
  inset: 0;
  width: 100%;
  height: 100%;
  padding: 0;
  overflow: hidden;
  border: 0;
  border-radius: 0;
  background: #f1f1f1;
  box-shadow: none;
  opacity: 1;
  backdrop-filter: none;
  transform: none;
  animation: none;
}

.landing-page .source-window-bar,
.landing-page .source-panel strong,
.landing-page .source-panel p {
  display: none;
}

.landing-page .source-panel img {
  width: 100%;
  height: 100%;
  aspect-ratio: auto;
  object-fit: contain;
  object-position: 50% 50%;
  border: 0;
  border-radius: 0;
  opacity: 1;
  filter: saturate(0.96) contrast(1.02) brightness(1.02);
}

.landing-page .cinematic-stage {
  inset: clamp(118px, 13vh, 156px) clamp(58px, 5.8vw, 96px) clamp(112px, 15vh, 154px) auto;
  width: min(820px, 46vw);
  overflow: visible;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  perspective: 1400px;
  transform-style: preserve-3d;
  animation: stage-drift 18s ease-in-out infinite alternate;
}

.landing-page .stage-grid,
.landing-page .stage-beams,
.landing-page .dashboard-panel,
.landing-page .voucher-panel,
.landing-page .assessment-panel,
.landing-page .receipt-frame {
  display: block;
}

.landing-page .ipa-flow {
  display: flex;
}

.landing-page .stage-grid {
  opacity: 0.34;
  background-image:
    linear-gradient(rgba(8, 127, 110, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(8, 127, 110, 0.1) 1px, transparent 1px);
}

.landing-page .stage-beam {
  background: linear-gradient(90deg, transparent, rgba(8, 127, 110, 0.44), transparent);
  box-shadow: 0 0 18px rgba(8, 127, 110, 0.12);
}

.landing-page .scene-panel,
.landing-page .receipt-frame,
.landing-page .ipa-flow {
  border-color: rgba(8, 127, 110, 0.16);
  background: rgba(9, 22, 20, 0.88);
  box-shadow: 0 24px 56px rgba(17, 24, 22, 0.18);
  backdrop-filter: blur(10px);
  opacity: var(--hero-fade);
}

.landing-page .source-panel {
  display: block;
  inset: auto;
  top: 51%;
  right: 29.5%;
  width: min(270px, 19vw);
  height: auto;
  padding: 8px;
  overflow: hidden;
  border: 1px solid rgba(8, 127, 110, 0.16);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 24px 56px rgba(17, 24, 22, 0.18);
  opacity: var(--hero-fade);
  backdrop-filter: blur(10px);
  transform: translate3d(calc(var(--source-x) + var(--mouse-x-soft)), calc(var(--source-y) + var(--mouse-y-soft)), 42px) rotateY(calc(-9deg + var(--mouse-yaw-soft))) rotateX(calc(3deg - var(--mouse-pitch-soft)));
  animation: source-float 7.5s ease-in-out infinite alternate;
}

.landing-page .source-window-bar {
  display: grid;
  color: rgba(17, 24, 22, 0.62);
}

.landing-page .source-panel strong {
  display: block;
  color: #111816;
}

.landing-page .source-panel p {
  display: block;
  color: rgba(17, 24, 22, 0.64);
}

.landing-page .source-panel img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  object-position: 50% 20%;
  border: 1px solid rgba(8, 127, 110, 0.14);
  border-radius: 8px;
  opacity: 1;
  filter: saturate(0.92) contrast(1.02) brightness(1);
}

.landing-page .hero-metrics {
  min-height: 132px;
  background: #ffffff;
  border-top: 1px solid var(--oa-line);
  border-bottom: 0;
}

.landing-page .impact-metric {
  align-content: center;
  border-left-color: var(--oa-line);
}

.landing-page .impact-metric strong {
  color: #000000;
  font-weight: 760;
}

.landing-page .impact-label {
  color: #000000;
  font-weight: 720;
}

.landing-page .impact-note {
  color: var(--oa-muted);
  font-weight: 400;
}

.landing-page .optimization-section,
.landing-page .faculty-section {
  color: var(--oa-ink);
  background: #ffffff;
}

.landing-page .optimization-section::before,
.landing-page .faculty-section::before {
  background: var(--oa-line);
}

.landing-page .optimization-section .landing-label,
.landing-page .faculty-section .landing-label {
  color: var(--oa-accent);
  font-weight: 700;
}

.landing-page .lab-modules article,
.landing-page .teaching-steps li {
  border: 1px solid var(--oa-line);
  border-radius: 4px;
  color: var(--oa-ink);
  background: #ffffff;
  box-shadow: none;
}

.landing-page .lab-modules article:hover,
.landing-page .lab-modules article:focus-visible,
.landing-page .teaching-steps li:hover,
.landing-page .teaching-steps li:focus-visible {
  border-color: rgba(0, 0, 0, 0.28);
  background: #f1f1f1;
  transform: none;
}

.landing-page .lab-modules article.is-selected,
.landing-page .teaching-steps li.is-selected {
  border-color: #000000;
  color: #ffffff;
  background: #000000;
  transform: none;
}

.landing-page .lab-modules article strong,
.landing-page .teaching-steps li strong {
  color: inherit;
  font-weight: 720;
}

.landing-page .teaching-steps li span {
  color: var(--oa-muted);
}

.landing-page .teaching-steps li.is-selected span {
  color: rgba(255, 255, 255, 0.72);
}

.landing-page .status-pill {
  color: var(--oa-muted);
  border-color: var(--oa-line);
  background: #f1f1f1;
}

.landing-page .lab-modules article.is-selected .status-pill {
  color: #000000;
  border-color: #ffffff;
  background: #ffffff;
}

.landing-page .lab-console,
.landing-page .teaching-live-panel {
  border: 1px solid var(--oa-line);
  border-radius: 5px;
  color: var(--oa-ink);
  background: #ffffff;
  box-shadow: none;
}

.landing-page .lab-console-title,
.landing-page .teaching-live-title {
  color: #000000;
  font-weight: 720;
  letter-spacing: -0.012em;
}

.landing-page .lab-console-text,
.landing-page .teaching-live-text,
.landing-page .comparison-note {
  color: var(--oa-muted);
}

.landing-page .lab-flow span,
.landing-page .lab-metrics div,
.landing-page .teaching-orbit span {
  color: #000000;
  border-color: var(--oa-line);
  background: #f1f1f1;
}

.landing-page .teaching-orbit {
  gap: 0;
  border-top: 1px solid var(--oa-line);
}

.landing-page .teaching-orbit span {
  justify-content: flex-start;
  min-height: 48px;
  padding: 0;
  border: 0;
  border-bottom: 1px solid var(--oa-line);
  border-radius: 0;
  background: transparent;
  font-weight: 650;
}

.landing-page .lab-flow i,
.landing-page .teaching-orbit i {
  display: none;
}

.landing-page .lab-metrics span {
  color: var(--oa-muted);
}

.landing-page .lab-metrics strong,
.landing-page .comparison-cell.is-after {
  color: var(--oa-accent);
}

.landing-page .comparison-table {
  border: 1px solid var(--oa-line);
  border-radius: 4px;
  overflow: hidden;
  background: #ffffff;
}

.landing-page .comparison-cell {
  color: var(--oa-muted);
  border-top: 1px solid var(--oa-soft-line);
  border-left: 1px solid var(--oa-soft-line);
  background: #ffffff;
}

.landing-page .comparison-cell.is-header {
  color: #000000;
  background: #f1f1f1;
}

.landing-page .comparison-cell.is-header span {
  color: var(--oa-muted);
}

.landing-page .comparison-cell.is-label {
  color: #000000;
}

.landing-page .comparison-cell.is-warning {
  color: #8a5a00;
}

@media (max-width: 1180px) {
  .landing-page .cinematic-stage {
    inset: auto 28px 150px 28px;
    width: auto;
    height: 360px;
  }
}

@media (max-width: 760px) {
  .landing-page .hero-copy {
    max-width: 100%;
  }

  .landing-page .cinematic-stage {
    position: relative;
    inset: auto;
    width: calc(100% - 36px);
    height: 300px;
    margin: 34px auto 0;
  }

  .landing-page .hero-metrics {
    margin-top: 28px;
  }
}

/* Wider, image-led landing composition for the public site. */
@media (min-width: 1181px) {
  .landing-section,
  .platform-section,
  .optimization-section,
  .faculty-section {
    width: min(1520px, calc(100vw - 96px));
  }

  .platform-section.light-story-section {
    width: min(1660px, calc(100vw - 84px));
    grid-template-columns: minmax(340px, 500px) minmax(680px, 1040px);
    gap: clamp(46px, 5vw, 92px);
    padding-right: 0;
    padding-left: 0;
  }

  .platform-section.light-story-section .openai-style-showcase {
    grid-template-columns: minmax(210px, 270px) minmax(0, 1fr);
  }

  .platform-section.light-story-section .story-frame {
    min-height: clamp(520px, 62vh, 700px);
  }
}

.story-student .story-receipt {
  z-index: 2;
  left: 6.6%;
  top: 10%;
  width: min(400px, 40%);
  background: #ffffff;
  transform: rotate(-0.6deg);
}

.story-student .story-receipt img {
  filter: saturate(0.96) contrast(1.02);
}

.story-prototype {
  position: absolute;
  z-index: 3;
  left: 10%;
  bottom: 8%;
  width: min(500px, 46%);
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(17, 24, 22, 0.12);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 18px 42px rgba(17, 24, 22, 0.16);
}

.story-prototype img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: 50% 12%;
}

.story-prototype figcaption {
  position: absolute;
  left: 12px;
  bottom: 10px;
  margin: 0;
  padding: 5px 8px;
  border-radius: 999px;
  color: #ffffff;
  background: rgba(8, 17, 15, 0.72);
  font-size: 12px;
  font-weight: 750;
}

.story-student .story-card-main {
  z-index: 4;
  top: 30%;
  right: 5.5%;
  bottom: auto;
  width: min(390px, 38%);
}

.landing-page .showcase-tabs button.is-selected {
  min-height: 0;
  background: transparent;
}

.landing-page .showcase-tabs {
  display: flex;
  flex-direction: column;
  min-height: 420px;
}

.landing-page .showcase-tabs button {
  box-sizing: border-box;
  flex: 1 1 0;
  height: auto;
  min-height: 0;
  align-content: center;
  gap: 10px;
  padding-top: 16px;
  padding-bottom: 16px;
  transition:
    flex-grow 260ms cubic-bezier(0.16, 1, 0.3, 1),
    background-color 180ms ease;
}

.landing-page .showcase-tabs button p {
  display: block;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transform: translateY(-2px);
  transition:
    max-height 220ms cubic-bezier(0.16, 1, 0.3, 1),
    opacity 180ms ease,
    transform 220ms cubic-bezier(0.16, 1, 0.3, 1);
}

.landing-page .showcase-tabs button.is-selected p {
  max-height: 0;
  opacity: 0;
  transform: translateY(-2px);
}

.landing-page .showcase-tabs button:hover,
.landing-page .showcase-tabs button:focus-visible {
  flex-grow: 1.78;
  background: #f1f1f1;
}

.landing-page .showcase-tabs button:hover p,
.landing-page .showcase-tabs button:focus-visible p {
  max-height: 74px;
  opacity: 1;
  transform: translateY(0);
}

.landing-page .showcase-tabs button.is-selected strong {
  color: var(--oa-ink);
}

.landing-page .showcase-tabs button:hover strong,
.landing-page .showcase-tabs button:focus-visible strong {
  color: #000000;
}

@media (max-width: 1180px) {
  .landing-page .showcase-tabs {
    min-height: 380px;
  }

  .landing-page .showcase-tabs button {
    height: auto;
  }

  .story-student .story-receipt {
    left: 7%;
    top: 12%;
    width: min(380px, 46%);
  }

  .story-prototype {
    left: 36%;
    bottom: 10%;
    width: min(480px, 54%);
  }

  .story-student .story-card-main {
    top: auto;
    right: 7%;
    bottom: 7%;
    left: auto;
    width: min(360px, 44%);
  }
}

@media (max-width: 760px) {
  .story-student .story-receipt {
    left: 8%;
    top: 8%;
    width: 72%;
  }

  .story-prototype {
    left: 8%;
    right: 8%;
    bottom: 24%;
    width: auto;
  }

  .story-student .story-card-main {
    left: 8%;
    right: 8%;
    bottom: 6%;
    width: auto;
  }
}

/* Light hero composition: keep the original layered stage instead of a static screenshot stack. */
@media (min-width: 1181px) {
  .landing-page .cinematic-stage {
    inset: clamp(98px, 11vh, 138px) clamp(38px, 3.8vw, 66px) clamp(118px, 16vh, 170px) auto;
    width: min(1040px, 58vw);
    overflow: visible;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    perspective: 1500px;
    transform-style: preserve-3d;
    animation: stage-drift 18s ease-in-out infinite alternate;
  }

  .landing-page .dashboard-panel {
    top: 5%;
    right: 3%;
    width: min(610px, 38.5vw);
    z-index: 1;
  }

  .landing-page .assessment-panel {
    top: 43.5%;
    right: 4%;
    width: min(320px, 20.5vw);
    z-index: 3;
  }

  .landing-page .voucher-panel {
    top: 70.5%;
    right: 8%;
    width: min(350px, 22.5vw);
    z-index: 4;
  }

  .landing-page .source-panel {
    top: 55%;
    right: 46%;
    width: min(326px, 20.5vw);
    z-index: 2;
  }

  .landing-page .receipt-frame {
    top: 42%;
    right: 61%;
    width: min(174px, 10.8vw);
    z-index: 5;
  }

  .landing-page .ipa-flow {
    right: 7%;
    bottom: 3.5%;
    z-index: 6;
  }
}

.landing-page .source-panel {
  border-color: rgba(8, 127, 110, 0.2);
  background: rgba(8, 20, 18, 0.92);
  color: #f5fffc;
  box-shadow: 0 28px 64px rgba(17, 24, 22, 0.2);
}

.landing-page .source-window-bar {
  color: rgba(232, 255, 249, 0.66);
}

.landing-page .source-panel strong {
  color: #f9fffd;
}

.landing-page .source-panel p {
  color: rgba(232, 255, 249, 0.72);
}

.landing-page .source-panel img {
  border-color: rgba(143, 255, 231, 0.18);
  filter: saturate(0.96) contrast(1.04) brightness(0.98);
}

/* Problem / solution screen: OpenAI-style media frame with a compact method rail. */
@media (min-width: 1181px) {
  .landing-page .optimization-section {
    width: min(1680px, calc(100vw - 112px));
    grid-template-columns: minmax(440px, 0.52fr) minmax(860px, 1.16fr);
    gap: clamp(58px, 5vw, 104px);
    padding-top: clamp(84px, 10vh, 120px);
  }

  .landing-page .optimization-section .section-heading {
    align-self: center;
  }

  .landing-page .optimization-lab {
    display: grid;
    grid-template-columns: minmax(220px, 0.32fr) minmax(640px, 1fr);
    gap: 22px;
    align-items: center;
  }

  .landing-page .lab-modules {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 0;
    padding: 18px 0;
  }

  .landing-page .lab-modules::before {
    content: "";
    position: absolute;
    top: 28px;
    bottom: 28px;
    left: 8px;
    width: 1px;
    background: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.18), transparent);
  }

  .landing-page .lab-modules article {
    position: relative;
    display: grid;
    gap: 7px;
    min-height: 78px;
    padding: 14px 0 14px 28px;
    border: 0;
    border-top: 1px solid var(--oa-line);
    border-radius: 0;
    background: transparent;
    box-shadow: none;
  }

  .landing-page .lab-modules article:last-child {
    border-bottom: 1px solid var(--oa-line);
  }

  .landing-page .lab-modules article::before {
    content: "";
    position: absolute;
    left: 3px;
    top: 28px;
    width: 10px;
    height: 10px;
    border: 1px solid rgba(0, 0, 0, 0.22);
    border-radius: 999px;
    background: #ffffff;
  }

  .landing-page .lab-modules article.is-selected::before,
  .landing-page .lab-modules article:hover::before,
  .landing-page .lab-modules article:focus-visible::before {
    border-color: var(--oa-accent);
    background: var(--oa-accent);
    box-shadow: 0 0 0 7px rgba(0, 131, 112, 0.1);
  }

  .landing-page .lab-modules article.is-selected,
  .landing-page .lab-modules article:hover,
  .landing-page .lab-modules article:focus-visible {
    color: var(--oa-ink);
    background: transparent;
    transform: none;
  }

  .landing-page .lab-modules article strong {
    max-width: 15ch;
    margin-top: 0;
    color: #000000;
    font-size: 17px;
    line-height: 1.22;
    font-weight: 760;
    letter-spacing: -0.01em;
  }

  .landing-page .lab-modules .status-pill {
    justify-self: start;
    padding: 0;
    border: 0;
    border-radius: 0;
    color: var(--oa-accent);
    background: transparent;
    font-size: 12px;
    font-weight: 760;
  }
}

.landing-page .lab-console {
  position: relative;
  min-height: clamp(560px, 62vh, 690px);
  padding: clamp(28px, 3vw, 46px);
  overflow: hidden;
  border: 1px solid #d7d7d7;
  border-radius: 8px;
  background:
    radial-gradient(circle at 8% 14%, rgba(80, 221, 255, 0.96), transparent 30%),
    radial-gradient(circle at 92% 10%, rgba(226, 245, 131, 0.96), transparent 34%),
    radial-gradient(circle at 54% 96%, rgba(255, 170, 199, 0.78), transparent 34%),
    linear-gradient(135deg, #ffffff 0%, #f7f7f7 48%, #e9f6ff 100%);
  box-shadow: none;
  isolation: isolate;
}

.landing-page .lab-console::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.62) 0%, rgba(255, 255, 255, 0.04) 42%, rgba(255, 255, 255, 0.72) 100%),
    linear-gradient(180deg, transparent 0%, rgba(255, 255, 255, 0.44) 100%);
  pointer-events: none;
}

.landing-page .lab-console::after {
  content: "model_provider.yaml\A provider: qwen3-8b\A adapter: qlora\A rubric: accounting_training\A fallback: deepseek";
  position: absolute;
  top: 16%;
  right: 7%;
  width: min(330px, 36%);
  height: 170px;
  z-index: 0;
  box-sizing: border-box;
  padding: 28px;
  border-radius: 6px;
  background:
    linear-gradient(#0a1512, #0a1512) padding-box,
    linear-gradient(135deg, rgba(143, 255, 231, 0.5), rgba(255, 255, 255, 0.12)) border-box;
  border: 1px solid transparent;
  box-shadow: 0 22px 52px rgba(0, 0, 0, 0.12);
  color: rgba(224, 255, 247, 0.9);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.72;
  white-space: pre;
  opacity: 0.94;
}

.landing-page .lab-console > * {
  position: relative;
  z-index: 1;
}

.landing-page .lab-console > .landing-label {
  display: inline-flex;
  justify-self: start;
  margin-bottom: 8px;
  padding: 5px 10px;
  border: 1px solid rgba(0, 131, 112, 0.22);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
}

.landing-page .lab-console-title {
  display: block;
  max-width: 420px;
  color: #000000;
  font-size: clamp(28px, 2.5vw, 42px);
  line-height: 1.08;
  font-weight: 820;
  letter-spacing: -0.028em;
}

.landing-page .lab-console-text {
  max-width: 49ch;
  margin-top: 14px;
  color: rgba(0, 0, 0, 0.64);
  font-size: 16px;
  line-height: 1.76;
}

.landing-page .model-pipeline {
  position: absolute;
  left: clamp(28px, 3vw, 46px);
  top: 210px;
  width: min(390px, 52%);
  margin-top: 0;
  padding: 14px 16px;
  border: 0;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(14px);
}

.landing-page .model-pipeline span {
  color: #ffffff;
  font-size: 12px;
  font-weight: 800;
}

.landing-page .model-pipeline i {
  display: block;
  height: 1px;
  background: rgba(143, 255, 231, 0.86);
}

.landing-page .lab-metrics {
  display: none;
}

.landing-page .lab-metrics div {
  min-height: 74px;
  padding: 14px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(16px);
}

.landing-page .lab-console .effect-comparison {
  position: absolute;
  right: clamp(24px, 3vw, 42px);
  bottom: clamp(22px, 3vh, 38px);
  z-index: 2;
  width: min(590px, calc(100% - 56px));
  padding: 18px;
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.08);
  backdrop-filter: blur(18px);
}

.landing-page .lab-console .effect-comparison-title {
  margin: 0 0 11px;
  color: #000000;
  font-size: 18px;
  font-weight: 780;
  letter-spacing: -0.014em;
}

.landing-page .lab-console .comparison-table {
  grid-template-columns: minmax(154px, 1fr) minmax(112px, 0.7fr) minmax(132px, 0.76fr);
  border-radius: 6px;
}

.landing-page .lab-console .comparison-cell {
  min-height: 34px;
  padding: 8px 10px;
  font-size: 12px;
}

.landing-page .lab-console .comparison-cell.is-header {
  min-height: 40px;
  background: rgba(0, 0, 0, 0.045);
}

.landing-page .lab-console .comparison-note {
  max-width: 100%;
  margin: 10px 0 0;
  color: rgba(0, 0, 0, 0.55);
  font-size: 11px;
  line-height: 1.58;
}

@media (max-width: 1180px) {
  .landing-page .optimization-lab {
    grid-template-columns: 1fr;
  }

  .landing-page .lab-console {
    min-height: auto;
  }

  .landing-page .lab-console .effect-comparison {
    position: relative;
    right: auto;
    bottom: auto;
    width: 100%;
    margin-top: 22px;
  }
}

/* Teaching application screen: turn the card stack into a classroom loop stage. */
@media (min-width: 1181px) {
  .landing-page .faculty-section {
    width: min(1680px, calc(100vw - 112px));
    grid-template-columns: minmax(450px, 0.55fr) minmax(900px, 1.18fr);
    gap: clamp(64px, 6vw, 118px);
    padding-top: clamp(92px, 11vh, 132px);
  }

  .landing-page .teaching-loop {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
    align-items: center;
  }

  .landing-page .teaching-steps {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 0;
    margin: 0;
    padding: 22px 0;
  }

  .landing-page .teaching-steps::before {
    content: "";
    position: absolute;
    top: 34px;
    bottom: 34px;
    left: 8px;
    width: 1px;
    background: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.18), transparent);
  }

  .landing-page .teaching-steps li {
    position: relative;
    display: grid;
    gap: 9px;
    min-height: 112px;
    padding: 18px 0 18px 32px;
    border: 0;
    border-top: 1px solid var(--oa-line);
    border-radius: 0;
    background: transparent;
  }

  .landing-page .teaching-steps li:last-child {
    border-bottom: 1px solid var(--oa-line);
  }

  .landing-page .teaching-steps li::before {
    content: "";
    position: absolute;
    left: 3px;
    top: 24px;
    width: 10px;
    height: 10px;
    border: 1px solid rgba(0, 0, 0, 0.22);
    border-radius: 999px;
    background: #ffffff;
  }

  .landing-page .teaching-steps li.is-selected::before,
  .landing-page .teaching-steps li:hover::before,
  .landing-page .teaching-steps li:focus-visible::before {
    border-color: var(--oa-accent);
    background: var(--oa-accent);
    box-shadow: 0 0 0 7px rgba(0, 131, 112, 0.1);
  }

  .landing-page .teaching-steps li.is-selected,
  .landing-page .teaching-steps li:hover,
  .landing-page .teaching-steps li:focus-visible {
    color: var(--oa-ink);
    background: transparent;
    transform: none;
  }

  .landing-page .teaching-steps li strong {
    color: #000000;
    font-size: 20px;
    line-height: 1.2;
    font-weight: 780;
    letter-spacing: -0.015em;
  }

  .landing-page .teaching-steps li span,
  .landing-page .teaching-steps li.is-selected span {
    max-width: 25ch;
    color: rgba(0, 0, 0, 0.58);
    font-size: 13px;
    line-height: 1.58;
  }
}

.landing-page .teaching-live-panel {
  position: relative;
  min-height: clamp(560px, 62vh, 700px);
  padding: clamp(30px, 3.2vw, 48px);
  overflow: hidden;
  border: 1px solid #d7d7d7;
  border-radius: 8px;
  background:
    radial-gradient(circle at 7% 10%, rgba(77, 162, 255, 0.82), transparent 34%),
    radial-gradient(circle at 28% 90%, rgba(255, 180, 137, 0.58), transparent 31%),
    radial-gradient(circle at 86% 22%, rgba(121, 232, 210, 0.84), transparent 34%),
    linear-gradient(135deg, #f8fbff 0%, #e9f4ff 42%, #f9f2ec 100%);
  box-shadow: none;
  isolation: isolate;
}

.landing-page .teaching-live-panel::before {
  content: "教师运营台\A 43  班级学生    207  评分记录    11  低分提醒\A 作业完成 78%     复盘质量 66%     知识覆盖 92%";
  position: absolute;
  top: 16%;
  left: 9%;
  z-index: 0;
  width: min(520px, 58%);
  min-height: 180px;
  box-sizing: border-box;
  padding: 28px;
  border: 1px solid rgba(143, 255, 231, 0.2);
  border-radius: 8px;
  background: rgba(7, 18, 16, 0.9);
  color: rgba(232, 255, 249, 0.9);
  font-size: 15px;
  font-weight: 760;
  line-height: 2.05;
  white-space: pre;
  box-shadow: 0 24px 56px rgba(0, 0, 0, 0.14);
}

.landing-page .teaching-live-panel::after {
  content: "课堂讲评建议\A 优先处理低分与异常复盘，把教师注意力集中到教学薄弱点。";
  position: absolute;
  right: 8%;
  bottom: 22%;
  z-index: 1;
  width: min(330px, 36%);
  min-height: 144px;
  box-sizing: border-box;
  padding: 24px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.82);
  color: rgba(0, 0, 0, 0.74);
  font-size: 15px;
  font-weight: 650;
  line-height: 1.7;
  white-space: pre-wrap;
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.08);
  backdrop-filter: blur(16px);
}

.landing-page .teaching-live-panel > * {
  position: relative;
  z-index: 2;
}

.landing-page .teaching-live-panel > .landing-label {
  display: inline-flex;
  justify-self: start;
  margin-bottom: 8px;
  padding: 5px 10px;
  border: 1px solid rgba(0, 131, 112, 0.22);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
}

.landing-page .teaching-live-title {
  display: block;
  max-width: 420px;
  color: #000000;
  font-size: clamp(30px, 2.7vw, 44px);
  line-height: 1.08;
  font-weight: 820;
  letter-spacing: -0.028em;
}

.landing-page .teaching-live-text {
  max-width: 43ch;
  margin-top: 14px;
  color: rgba(0, 0, 0, 0.62);
  font-size: 16px;
  line-height: 1.76;
}

.landing-page .teaching-orbit {
  position: absolute;
  left: clamp(30px, 3.2vw, 48px);
  right: clamp(30px, 3.2vw, 48px);
  bottom: clamp(26px, 3.2vh, 42px);
  z-index: 3;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0;
  padding: 12px 14px;
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(16px);
}

.landing-page .teaching-orbit i {
  display: none;
}

.landing-page .teaching-orbit span {
  justify-content: center;
  min-height: 34px;
  padding: 0 10px;
  border: 0;
  border-radius: 999px;
  color: #000000;
  background: transparent;
  font-size: 12px;
  font-weight: 760;
}

.landing-page .teaching-orbit span:nth-of-type(2),
.landing-page .teaching-orbit span:nth-of-type(3) {
  background: rgba(0, 131, 112, 0.1);
}

@media (max-width: 1180px) {
  .landing-page .teaching-loop {
    grid-template-columns: 1fr;
  }

  .landing-page .teaching-live-panel {
    min-height: 560px;
  }
}

@media (max-width: 760px) {
  .landing-page .teaching-live-panel::before,
  .landing-page .teaching-live-panel::after {
    position: relative;
    inset: auto;
    display: block;
    width: 100%;
    margin-top: 18px;
  }

  .landing-page .teaching-orbit {
    position: relative;
    left: auto;
    right: auto;
    bottom: auto;
    grid-template-columns: 1fr;
    margin-top: 18px;
    border-radius: 8px;
  }
}

/* Teaching application refinement: OpenAI-style accordion plus a stable visual frame. */
.teaching-flow-map {
  display: none;
}

.landing-page .teaching-live-panel::before,
.landing-page .teaching-live-panel::after {
  content: none;
}

.landing-page .teaching-orbit {
  display: none;
}

.landing-page .teaching-flow-map {
  position: absolute;
  top: clamp(72px, 9vh, 112px);
  left: clamp(36px, 5vw, 72px);
  right: clamp(26px, 4vw, 58px);
  z-index: 4;
  min-height: 112px;
  display: flex;
  align-items: center;
  pointer-events: none;
}

.landing-page .teaching-flow-map::before {
  content: "";
  position: absolute;
  inset: -40px -28px -30px;
  border-radius: 18px;
  background:
    radial-gradient(circle at 10% 42%, rgba(255, 255, 255, 0.74), transparent 36%),
    radial-gradient(circle at 62% 20%, rgba(255, 255, 255, 0.58), transparent 42%);
  filter: blur(6px);
  opacity: 0.8;
}

.landing-page .teaching-flow-track {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  width: 100%;
  min-width: 0;
}

.landing-page .teaching-flow-track > i {
  width: clamp(18px, 2.8vw, 52px);
  height: 1px;
  flex: 1 1 28px;
  background: rgba(0, 0, 0, 0.22);
}

.landing-page .teaching-flow-node {
  min-height: 48px;
  display: inline-grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "icon title"
    "icon meta";
  align-items: center;
  column-gap: 10px;
  flex: 0 0 auto;
  padding: 9px 15px 9px 10px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  color: rgba(0, 0, 0, 0.72);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.08);
  backdrop-filter: blur(18px);
}

.landing-page .teaching-flow-node b {
  grid-area: icon;
  width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: rgba(0, 131, 112, 0.1);
  color: var(--oa-accent);
  font-size: 12px;
  font-weight: 820;
}

.landing-page .teaching-flow-node strong {
  grid-area: title;
  color: #101514;
  font-size: 14px;
  line-height: 1.05;
  font-weight: 760;
  white-space: nowrap;
}

.landing-page .teaching-flow-node em {
  grid-area: meta;
  margin-top: 3px;
  color: rgba(0, 0, 0, 0.48);
  font-size: 11px;
  font-style: normal;
  line-height: 1;
  white-space: nowrap;
}

.landing-page .teaching-flow-node.is-active {
  border-color: rgba(0, 131, 112, 0.18);
  background: rgba(240, 255, 251, 0.88);
}

.landing-page .teaching-flow-node.is-active b,
.landing-page .teaching-flow-node.is-start b {
  background: #caffe9;
  color: #003f36;
}

.landing-page .teaching-live-copy {
  position: relative;
  z-index: 3;
  width: min(540px, 82%);
  margin-top: clamp(148px, 17vh, 188px);
  padding: 0;
}

.landing-page .teaching-live-copy .landing-label {
  display: inline-flex;
  margin-bottom: 14px;
  padding: 5px 10px;
  border: 1px solid rgba(0, 131, 112, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.76);
}

.landing-page .teaching-live-title {
  max-width: 11em;
  font-size: clamp(30px, 2.45vw, 40px);
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.landing-page .teaching-live-text {
  max-width: 42ch;
  margin-top: 12px;
  font-size: 15px;
  line-height: 1.68;
}

.landing-page .teaching-screen-frame {
  position: absolute;
  left: clamp(34px, 4vw, 58px);
  bottom: clamp(70px, 8vh, 108px);
  z-index: 2;
  width: min(500px, 58%);
  min-height: 220px;
  box-sizing: border-box;
  padding: 18px;
  border: 1px solid rgba(0, 0, 0, 0.12);
  border-radius: 8px;
  background: rgba(8, 21, 18, 0.9);
  color: rgba(234, 255, 250, 0.88);
  box-shadow: 0 28px 64px rgba(0, 0, 0, 0.16);
}

.landing-page .teaching-screen-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: inherit;
  background:
    linear-gradient(110deg, rgba(255, 255, 255, 0.14), transparent 38%),
    radial-gradient(circle at 88% 10%, rgba(143, 255, 231, 0.2), transparent 30%);
}

.landing-page .teaching-screen-header,
.landing-page .teaching-screen-body,
.landing-page .teaching-screen-list,
.landing-page .teaching-screen-score {
  position: relative;
  z-index: 1;
}

.landing-page .teaching-screen-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(202, 255, 243, 0.14);
  font-size: 13px;
  font-weight: 780;
}

.landing-page .teaching-screen-header strong {
  color: var(--oa-accent);
  font-size: 14px;
  white-space: nowrap;
}

.landing-page .teaching-screen-body {
  display: grid;
  grid-template-columns: 0.44fr 1fr;
  gap: 18px;
  align-items: stretch;
  padding-top: 16px;
}

.landing-page .teaching-screen-list {
  display: grid;
  gap: 9px;
}

.landing-page .teaching-screen-list span {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  border: 1px solid rgba(143, 255, 231, 0.18);
  border-radius: 8px;
  background: rgba(143, 255, 231, 0.08);
  font-size: 13px;
  font-weight: 780;
}

.landing-page .teaching-screen-score {
  display: grid;
  grid-template-columns: 74px 1fr;
  gap: 11px 12px;
  align-content: center;
  font-size: 12px;
  font-weight: 780;
}

.landing-page .teaching-screen-score i {
  width: 100%;
  height: 9px;
  align-self: center;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
}

.landing-page .teaching-screen-score i::before {
  content: "";
  display: block;
  width: var(--bar, 80%);
  height: 100%;
  border-radius: inherit;
  background: #8fffe7;
}

.landing-page .teaching-insight-card {
  position: absolute;
  right: clamp(34px, 4.6vw, 64px);
  bottom: clamp(108px, 13vh, 168px);
  z-index: 3;
  width: min(300px, 34%);
  box-sizing: border-box;
  padding: 22px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 22px 54px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(18px);
}

.landing-page .teaching-insight-card strong {
  display: block;
  color: #000000;
  font-size: 18px;
  line-height: 1.25;
  font-weight: 820;
  letter-spacing: -0.012em;
}

.landing-page .teaching-insight-card span {
  display: block;
  margin-top: 12px;
  color: rgba(0, 0, 0, 0.62);
  font-size: 14px;
  line-height: 1.66;
}

@media (min-width: 1181px) {
  .landing-page .teaching-steps li {
    min-height: 76px;
    padding-top: 20px;
    padding-bottom: 20px;
  }

  .landing-page .teaching-steps li span {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition:
      max-height 220ms ease,
      opacity 180ms ease;
  }

  .landing-page .teaching-steps li.is-selected span,
  .landing-page .teaching-steps li:hover span,
  .landing-page .teaching-steps li:focus-visible span {
    max-height: 7.5em;
    opacity: 1;
  }
}

@media (max-width: 1180px) {
  .landing-page .teaching-live-copy {
    width: min(520px, 100%);
  }

  .landing-page .teaching-screen-frame {
    left: 30px;
    right: 30px;
    bottom: 120px;
    width: auto;
  }

  .landing-page .teaching-insight-card {
    right: 48px;
    bottom: 284px;
    width: min(290px, 42%);
  }
}

@media (max-width: 760px) {
  .landing-page .teaching-live-panel {
    min-height: auto;
    display: grid;
    gap: 18px;
  }

  .landing-page .teaching-flow-map {
    position: relative;
    inset: auto;
    min-height: auto;
    display: block;
    order: 1;
    margin: -4px -8px 0;
    padding: 20px 8px 8px;
    overflow-x: auto;
  }

  .landing-page .teaching-flow-map::before {
    inset: 0;
    filter: blur(8px);
  }

  .landing-page .teaching-flow-track {
    min-width: 650px;
  }

  .landing-page .teaching-flow-node {
    min-height: 44px;
    padding-right: 13px;
  }

  .landing-page .teaching-live-copy {
    order: 2;
    margin-top: 0;
  }

  .landing-page .teaching-live-copy,
  .landing-page .teaching-screen-frame,
  .landing-page .teaching-insight-card,
  .landing-page .teaching-orbit {
    position: relative;
    inset: auto;
    width: 100%;
  }

  .landing-page .teaching-screen-body {
    grid-template-columns: 1fr;
  }

  .landing-page .teaching-insight-card {
    padding: 18px;
  }
}

/* Real material board: current-system screenshots plus the provided optimization visual. */
.landing-page .teaching-material-stage {
  min-height: clamp(560px, 62vh, 710px);
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: clamp(22px, 3vw, 34px);
  padding: clamp(26px, 3vw, 42px);
  overflow: hidden;
  border: 1px solid #d7d7d7;
  border-radius: 8px;
  background:
    radial-gradient(circle at 76% 12%, rgba(124, 255, 225, 0.44), transparent 26%),
    radial-gradient(circle at 92% 78%, rgba(206, 221, 255, 0.76), transparent 34%),
    linear-gradient(135deg, #ffffff 0%, #f6faf8 45%, #edf5ff 100%);
  box-shadow: none;
}

.landing-page .teaching-material-stage .teaching-live-copy {
  width: min(620px, 100%);
  margin-top: 0;
}

.landing-page .teaching-material-stage .teaching-live-title {
  max-width: none;
}

.teaching-material-board {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(260px, 0.88fr);
  grid-template-rows: minmax(0, 1fr) minmax(0, 1fr);
  gap: 14px;
  min-height: 420px;
}

.teaching-material-card {
  position: relative;
  min-width: 0;
  min-height: 0;
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(0, 0, 0, 0.12);
  border-radius: 10px;
  background: #ffffff;
  opacity: 0.72;
  filter: saturate(0.88);
  transform: translateY(0);
  transition:
    opacity 220ms ease,
    filter 220ms ease,
    border-color 220ms ease,
    transform 220ms ease;
}

.teaching-material-card.is-active {
  z-index: 2;
  opacity: 1;
  filter: saturate(1);
  border-color: rgba(0, 131, 112, 0.62);
  transform: translateY(-3px);
}

.teaching-material-card img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.teaching-material-primary {
  grid-row: 1 / 3;
}

.teaching-material-board[data-active-material="0"] [data-teaching-material="0"],
.teaching-material-board[data-active-material="1"] [data-teaching-material="1"],
.teaching-material-board[data-active-material="2"] [data-teaching-material="2"] {
  grid-column: 1;
  grid-row: 1 / 3;
}

.teaching-material-board[data-active-material="0"] [data-teaching-material="1"],
.teaching-material-board[data-active-material="1"] [data-teaching-material="0"],
.teaching-material-board[data-active-material="2"] [data-teaching-material="0"] {
  grid-column: 2;
  grid-row: 1;
}

.teaching-material-board[data-active-material="0"] [data-teaching-material="2"],
.teaching-material-board[data-active-material="1"] [data-teaching-material="2"],
.teaching-material-board[data-active-material="2"] [data-teaching-material="1"] {
  grid-column: 2;
  grid-row: 2;
}

.teaching-material-primary img {
  object-position: 50% 52%;
}

.teaching-material-review img {
  object-position: 46% 18%;
}

.teaching-material-optimization img {
  object-position: 42% 30%;
}

.teaching-material-card::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 46%;
  pointer-events: none;
  background: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.5));
}

.teaching-material-card figcaption {
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 14px;
  z-index: 1;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 12px;
  color: #ffffff;
}

.teaching-material-card figcaption span {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0 9px;
  border: 1px solid rgba(143, 255, 231, 0.46);
  border-radius: 999px;
  background: rgba(4, 18, 16, 0.58);
  color: #b9fff2;
  font-size: 12px;
  font-weight: 820;
}

.teaching-material-card figcaption strong {
  color: #ffffff;
  font-size: clamp(15px, 1.2vw, 18px);
  line-height: 1.15;
  font-weight: 820;
  letter-spacing: -0.012em;
  text-align: right;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.42);
}

@media (max-width: 1180px) {
  .teaching-material-board {
    min-height: 520px;
  }
}

@media (max-width: 760px) {
  .landing-page .teaching-material-stage {
    padding: 22px;
  }

  .teaching-material-board {
    grid-template-columns: 1fr;
    grid-template-rows: none;
    min-height: auto;
  }

  .teaching-material-card,
  .teaching-material-primary {
    grid-column: auto !important;
    grid-row: auto;
    min-height: 220px;
  }
}

/* Single demo component mode: one page is visible at a time, switched by tabs. */
.landing-page .teaching-material-board {
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: auto minmax(0, 1fr);
  gap: 14px;
  min-height: 430px;
}

.teaching-material-tabs {
  position: relative;
  z-index: 3;
  display: inline-flex;
  align-items: center;
  justify-self: start;
  gap: 4px;
  padding: 5px;
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(16px);
}

.teaching-material-tabs button {
  min-height: 34px;
  padding: 0 14px;
  border: 0;
  border-radius: 999px;
  color: rgba(5, 18, 16, 0.64);
  background: transparent;
  font: inherit;
  font-size: 13px;
  font-weight: 820;
  cursor: pointer;
}

.teaching-material-tabs button:hover,
.teaching-material-tabs button:focus-visible,
.teaching-material-tabs button.is-active {
  color: #001f1a;
  background: #8fffe7;
  outline: none;
}

.teaching-material-display {
  position: relative;
  min-height: 390px;
  overflow: hidden;
  border-radius: 10px;
  background:
    radial-gradient(circle at 18% 22%, rgba(255, 255, 255, 0.58), transparent 28%),
    linear-gradient(135deg, #8ed6ff 0%, #b9d1ff 36%, #2f39df 100%);
}

.teaching-demo-pane {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: 18px;
  padding: clamp(24px, 3vw, 40px);
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px) scale(0.99);
  transition:
    opacity 240ms ease,
    transform 260ms cubic-bezier(0.16, 1, 0.3, 1);
}

.teaching-demo-pane.is-active {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

.demo-browser-bar,
.student-demo-grid,
.teacher-demo-grid,
.optimization-demo-grid {
  border: 1px solid rgba(255, 255, 255, 0.72);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 22px 58px rgba(14, 36, 68, 0.16);
}

.demo-browser-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 10px;
  color: #0b1715;
  font-size: 13px;
  font-weight: 820;
  overflow: hidden;
  white-space: nowrap;
}

.demo-browser-bar span,
.demo-browser-bar em {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

.demo-browser-bar em {
  color: rgba(5, 18, 16, 0.5);
  font-style: normal;
  font-weight: 720;
}

.student-demo-grid,
.teacher-demo-grid,
.optimization-demo-grid {
  min-height: 0;
  border-radius: 12px;
  padding: clamp(18px, 2vw, 28px);
}

.student-demo-grid {
  display: grid;
  grid-template-columns: minmax(150px, 0.78fr) minmax(220px, 1fr);
  grid-template-rows: 1fr auto;
  gap: 16px;
}

.demo-upload-drop,
.demo-voucher-sheet,
.demo-review-note,
.demo-score-card,
.demo-dimensions,
.demo-teacher-comment,
.demo-optimization-stack > div {
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 10px;
  background: #ffffff;
}

.demo-upload-drop {
  grid-row: 1 / 3;
  display: grid;
  align-content: center;
  gap: 12px;
  padding: 24px;
  border-style: dashed;
  background:
    linear-gradient(135deg, rgba(143, 255, 231, 0.12), rgba(255, 255, 255, 0.92));
}

.demo-upload-drop span,
.demo-review-note span,
.demo-score-card span,
.demo-teacher-comment span {
  color: var(--oa-accent);
  font-size: 12px;
  font-weight: 850;
}

.demo-upload-drop strong {
  color: #071714;
  font-size: clamp(20px, 1.8vw, 26px);
  line-height: 1.1;
  font-weight: 850;
}

.demo-upload-drop p,
.demo-review-note p,
.demo-score-card p,
.demo-teacher-comment p {
  margin: 0;
  color: rgba(5, 18, 16, 0.62);
  font-size: 14px;
  line-height: 1.62;
}

.demo-voucher-sheet {
  padding: 18px;
}

.demo-sheet-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  font-weight: 820;
}

.demo-sheet-head strong {
  color: var(--oa-accent);
  font-size: 13px;
}

.demo-voucher-sheet table {
  width: 100%;
  margin-top: 12px;
  border-collapse: collapse;
  color: #0d1917;
  font-size: 13px;
}

.demo-voucher-sheet td {
  padding: 10px 6px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.07);
}

.demo-voucher-sheet td:last-child {
  text-align: right;
  color: var(--oa-accent);
  font-weight: 850;
}

.demo-review-note {
  padding: 16px 18px;
}

.teacher-demo-grid {
  display: grid;
  grid-template-columns: 180px 1fr;
  grid-template-rows: 1fr auto;
  gap: 16px;
}

.demo-score-card {
  grid-row: 1 / 3;
  display: grid;
  align-content: center;
  gap: 8px;
  padding: 22px;
}

.demo-score-card strong {
  color: var(--oa-accent);
  font-size: clamp(56px, 6vw, 86px);
  line-height: 0.94;
}

.demo-dimensions {
  display: grid;
  gap: 14px;
  padding: 20px;
}

.demo-dimensions div {
  display: grid;
  grid-template-columns: 74px 1fr 54px;
  align-items: center;
  gap: 12px;
  color: #13211f;
  font-size: 13px;
  font-weight: 780;
}

.demo-dimensions i {
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.08);
}

.demo-dimensions i::before {
  content: "";
  display: block;
  width: var(--w, 80%);
  height: 100%;
  border-radius: inherit;
  background: var(--oa-accent);
}

.demo-dimensions b {
  color: var(--oa-accent);
  font-size: 12px;
  text-align: right;
}

.demo-teacher-comment {
  padding: 16px 18px;
}

.landing-page .teacher-review-pane {
  grid-template-rows: minmax(0, 1fr);
  gap: 0;
  padding: clamp(24px, 3vw, 38px);
}

.landing-page .teacher-review-lens {
  display: grid;
  place-items: center;
  min-width: 0;
  min-height: 0;
  height: 100%;
}

.landing-page .teacher-review-window {
  position: relative;
  isolation: isolate;
  width: min(700px, 100%);
  height: 100%;
  min-height: 360px;
  max-height: 520px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.76);
  border-radius: 14px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(244, 248, 252, 0.94));
  box-shadow: 0 22px 54px rgba(16, 43, 92, 0.18);
  transform: translateZ(0);
  transition:
    transform 240ms cubic-bezier(0.16, 1, 0.3, 1),
    box-shadow 240ms ease;
}

.landing-page .teacher-review-window:hover,
.landing-page .teacher-review-window:focus-within {
  transform: translateY(-2px);
  box-shadow: 0 24px 58px rgba(16, 43, 92, 0.22);
}

.landing-page .teacher-review-window::before {
  content: "";
  position: absolute;
  top: 15px;
  left: 18px;
  z-index: 5;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: #ff5f57;
  box-shadow:
    17px 0 0 #febc2e,
    34px 0 0 #28c840;
}

.landing-page .teacher-review-window::after {
  content: "评分详情镜头";
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  z-index: 4;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: 0 20px;
  border-bottom: 1px solid rgba(5, 18, 16, 0.08);
  color: rgba(5, 18, 16, 0.48);
  font-size: 12px;
  font-weight: 820;
  background: rgba(255, 255, 255, 0.72);
}

.landing-page .teacher-review-score-focus,
.landing-page .teacher-review-dimension-focus {
  position: absolute;
  z-index: 3;
  border: 1px solid rgba(5, 18, 16, 0.1);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.96);
}

.landing-page .teacher-review-score-focus {
  top: 74px;
  left: 44px;
  width: min(160px, 28%);
  padding: 18px;
}

.landing-page .teacher-review-score-focus span,
.landing-page .teacher-focus-heading span {
  display: block;
  color: var(--oa-accent);
  font-size: 12px;
  font-weight: 850;
}

.landing-page .teacher-review-score-focus strong {
  display: block;
  margin-top: 6px;
  color: var(--oa-accent);
  font-size: clamp(44px, 5vw, 70px);
  line-height: 0.9;
  font-weight: 900;
}

.landing-page .teacher-review-score-focus p,
.landing-page .teacher-review-dimension-focus p {
  margin: 8px 0 0;
  color: rgba(5, 18, 16, 0.62);
  font-size: 13px;
  line-height: 1.5;
}

.landing-page .teacher-review-dimension-focus {
  right: 34px;
  bottom: 122px;
  width: min(330px, 48%);
  padding: 16px 18px;
}

.landing-page .teacher-focus-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
}

.landing-page .teacher-focus-heading strong {
  min-width: 0;
  color: #071714;
  font-size: 17px;
  line-height: 1.25;
  font-weight: 900;
}

.landing-page .teacher-focus-meter {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 12px;
  margin-top: 14px;
}

.landing-page .teacher-focus-meter i {
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(5, 18, 16, 0.09);
}

.landing-page .teacher-focus-meter i::before {
  content: "";
  display: block;
  width: var(--w, 92%);
  height: 100%;
  border-radius: inherit;
  background: var(--oa-accent);
}

.landing-page .teacher-focus-meter b {
  color: var(--oa-accent);
  font-size: 12px;
  font-weight: 850;
  white-space: nowrap;
}

.landing-page .teacher-review-hotspots {
  position: absolute;
  right: 22px;
  bottom: 18px;
  left: 22px;
  z-index: 4;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.landing-page .teacher-review-hotspots button {
  min-width: 0;
  min-height: 48px;
  padding: 9px 10px;
  border: 1px solid rgba(5, 18, 16, 0.1);
  border-radius: 8px;
  color: rgba(5, 18, 16, 0.72);
  background: rgba(255, 255, 255, 0.9);
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition:
    border-color 180ms ease,
    background 180ms ease,
    color 180ms ease,
    transform 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

.landing-page .teacher-review-hotspots button:hover,
.landing-page .teacher-review-hotspots button:focus-visible,
.landing-page .teacher-review-hotspots button.is-selected {
  border-color: rgba(0, 131, 112, 0.38);
  color: #062c26;
  background: #eafffa;
  outline: none;
  transform: translateY(-1px);
}

.landing-page .teacher-review-hotspots span,
.landing-page .teacher-review-hotspots b {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.landing-page .teacher-review-hotspots span {
  color: #20312e;
  font-size: 12px;
  font-weight: 850;
}

.landing-page .teacher-review-hotspots button:hover span,
.landing-page .teacher-review-hotspots button:focus-visible span,
.landing-page .teacher-review-hotspots button.is-selected span {
  color: #062c26;
}

.landing-page .teacher-review-hotspots b {
  margin-top: 3px;
  color: var(--oa-accent);
  font-size: 11px;
  font-weight: 850;
}

.landing-page .teacher-review-workspace {
  position: absolute;
  inset: 40px 20px 86px;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(128px, 0.42fr) minmax(0, 1fr);
  grid-template-rows: minmax(132px, 0.72fr) minmax(86px, auto) minmax(104px, auto);
  gap: 12px;
  overflow: hidden;
  border-radius: 10px;
  background:
    linear-gradient(180deg, rgba(249, 251, 252, 0.98), rgba(241, 246, 249, 0.96));
}

.landing-page .teacher-review-workspace::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(0, 131, 112, 0.045), transparent 32%, rgba(100, 118, 245, 0.045)),
    repeating-linear-gradient(0deg, transparent 0 55px, rgba(5, 18, 16, 0.035) 56px);
}

.landing-page .teacher-review-score-focus,
.landing-page .teacher-review-dimension-focus {
  position: static;
  z-index: auto;
  border: 1px solid rgba(5, 18, 16, 0.08);
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.94);
}

.landing-page .teacher-review-score-focus {
  grid-column: 1;
  grid-row: 1;
  align-self: stretch;
  width: auto;
  display: grid;
  align-content: center;
  padding: clamp(16px, 1.7vw, 22px);
}

.landing-page .teacher-review-score-focus strong {
  font-size: clamp(48px, 5.4vw, 76px);
}

.landing-page .teacher-review-detail-stack {
  grid-column: 2;
  grid-row: 1;
  min-width: 0;
  display: grid;
  align-content: center;
  gap: 7px;
  padding: clamp(10px, 1.2vw, 14px);
  border: 1px solid rgba(5, 18, 16, 0.08);
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.86);
}

.landing-page .teacher-review-row {
  display: grid;
  grid-template-columns: minmax(58px, 82px) minmax(70px, 1fr) minmax(42px, auto);
  align-items: center;
  gap: 12px;
  min-width: 0;
  padding: 7px 9px;
  border-radius: 8px;
  color: rgba(5, 18, 16, 0.72);
  transition:
    background 220ms ease,
    color 220ms ease,
    transform 220ms cubic-bezier(0.16, 1, 0.3, 1);
}

.landing-page .teacher-review-row.is-selected {
  color: #062c26;
  background: #eafffa;
  transform: translateX(2px);
}

.landing-page .teacher-review-row span {
  min-width: 0;
  overflow: hidden;
  color: inherit;
  font-size: 12px;
  font-weight: 850;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.landing-page .teacher-review-row i {
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(5, 18, 16, 0.09);
}

.landing-page .teacher-review-row i::before {
  content: "";
  display: block;
  width: var(--w, 90%);
  height: 100%;
  border-radius: inherit;
  background: var(--oa-accent);
}

.landing-page .teacher-review-row b {
  color: var(--oa-accent);
  font-size: 12px;
  font-weight: 850;
  text-align: right;
  white-space: nowrap;
}

.landing-page .teacher-review-dimension-focus {
  grid-column: 1 / -1;
  grid-row: 2;
  width: auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-content: center;
  gap: 8px;
  padding: clamp(13px, 1.4vw, 16px);
}

.landing-page .teacher-review-note {
  grid-column: 1 / -1;
  grid-row: 3;
  min-width: 0;
  display: grid;
  align-content: start;
  gap: 8px;
  padding: clamp(13px, 1.4vw, 16px);
  border: 1px solid rgba(5, 18, 16, 0.08);
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.72);
}

.landing-page .teacher-review-note label {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 10px;
  min-width: 0;
}

.landing-page .teacher-review-note span {
  display: block;
  color: var(--oa-accent);
  font-size: 12px;
  font-weight: 850;
}

.landing-page .teacher-review-note label strong {
  min-width: 0;
  overflow: hidden;
  color: rgba(5, 18, 16, 0.7);
  font-size: 12px;
  font-weight: 850;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.landing-page .teacher-review-note textarea {
  width: 100%;
  min-height: 58px;
  resize: none;
  border: 1px solid rgba(5, 18, 16, 0.11);
  border-radius: 8px;
  padding: 9px 10px;
  color: rgba(5, 18, 16, 0.78);
  font: inherit;
  font-size: 12.5px;
  font-weight: 620;
  line-height: 1.48;
  background: rgba(255, 255, 255, 0.88);
  outline: none;
  transition:
    border-color 180ms ease,
    box-shadow 180ms ease,
    background 180ms ease;
}

.landing-page .teacher-review-note textarea:focus {
  border-color: rgba(0, 131, 112, 0.42);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(143, 255, 231, 0.24);
}

.landing-page .teacher-review-note p {
  margin: 0;
  color: rgba(5, 18, 16, 0.64);
  font-size: 11.5px;
  line-height: 1.4;
}

.landing-page .teacher-review-dimension-focus .teacher-focus-heading,
.landing-page .teacher-review-dimension-focus .teacher-focus-meter,
.landing-page .teacher-review-dimension-focus p {
  min-width: 0;
}

.landing-page .teacher-review-dimension-focus p {
  margin-top: 0;
}

.landing-page .teacher-review-dimension-focus .teacher-focus-heading {
  justify-content: flex-start;
  gap: 10px;
}

.landing-page .teacher-review-dimension-focus .teacher-focus-heading strong {
  white-space: nowrap;
}

.landing-page .teacher-review-dimension-focus .teacher-focus-meter {
  margin-top: 0;
}

.landing-page .teacher-review-note [data-review-comment-status] {
  color: rgba(5, 18, 16, 0.52);
  font-weight: 700;
}

.landing-page .teacher-review-lens.is-refocusing .teacher-review-dimension-focus {
  animation: teacherReviewFocus 360ms cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes teacherReviewFocus {
  0% {
    opacity: 0.72;
    transform: translateY(6px) scale(0.985);
  }

  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.optimization-demo-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(210px, 0.8fr);
  gap: 16px;
}

.optimization-demo-grid figure {
  min-width: 0;
  min-height: 0;
  margin: 0;
  overflow: hidden;
  border-radius: 10px;
  background: #ffffff;
}

.optimization-demo-grid img {
  width: 100%;
  height: 100%;
  min-height: 250px;
  display: block;
  object-fit: cover;
  object-position: 40% 32%;
}

  .demo-optimization-stack {
    display: grid;
  align-content: center;
  gap: 12px;
}

.demo-optimization-stack > div {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 12px;
  padding: 14px;
}

.demo-optimization-stack span {
  grid-row: 1 / 3;
  width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: #8fffe7;
  color: #003f36;
  font-weight: 850;
}

.demo-optimization-stack strong {
  color: #071714;
  font-size: 14px;
}

.demo-optimization-stack em {
  color: rgba(5, 18, 16, 0.58);
  font-style: normal;
  font-size: 12px;
}

@media (max-width: 760px) {
  .landing-page .teaching-material-board {
    min-height: 0;
  }

  .teaching-material-tabs {
    width: 100%;
    justify-content: space-between;
  }

  .teaching-material-tabs button {
    flex: 1;
    padding: 0 8px;
  }

  .teaching-material-display {
    min-height: 620px;
  }

  .student-demo-grid,
  .teacher-demo-grid,
  .optimization-demo-grid {
    grid-template-columns: 1fr;
  }

  .demo-upload-drop,
  .demo-score-card {
    grid-row: auto;
  }
}

@media (min-width: 1181px) {
  .landing-page .teaching-loop {
    grid-template-columns: minmax(0, 1fr);
  }

  .landing-page .teaching-material-stage {
    width: min(100%, 760px);
    justify-self: start;
  }
}

/* Final evidence-stage pass: keep the floating scene readable on a white product page. */
.landing-page .dashboard-panel,
.landing-page .assessment-panel,
.landing-page .voucher-panel,
.landing-page .source-panel,
.landing-page .receipt-frame,
.landing-page .ipa-flow {
  border-color: rgba(11, 64, 56, 0.14);
  background: rgba(255, 255, 255, 0.72);
  color: #121817;
  box-shadow: 0 18px 38px rgba(17, 24, 22, 0.09);
  backdrop-filter: blur(10px);
}

.landing-page .dashboard-panel,
.landing-page .assessment-panel,
.landing-page .voucher-panel,
.landing-page .source-panel {
  overflow: hidden;
}

.landing-page .panel-topline,
.landing-page .mini-metrics span,
.landing-page .dashboard-lines,
.landing-page .dashboard-lines div,
.landing-page .score-dimensions,
.landing-page .score-dimensions div,
.landing-page .voucher-summary {
  color: rgba(18, 24, 23, 0.68);
}

.landing-page .panel-topline strong,
.landing-page .mini-metrics strong,
.landing-page .dashboard-lines b,
.landing-page .score-dimensions b,
.landing-page .assessment-panel .panel-topline strong,
.landing-page .ledger-row em {
  color: #087f70;
}

.landing-page .mini-metrics div {
  border-color: rgba(8, 127, 112, 0.13);
  background: rgba(8, 127, 112, 0.055);
}

.landing-page .dashboard-lines span,
.landing-page .score-dimensions i {
  background: linear-gradient(90deg, #22bea6 var(--w), rgba(8, 127, 112, 0.13) var(--w));
}

.landing-page .ledger-preview {
  border-color: rgba(8, 127, 112, 0.13);
  background: rgba(255, 255, 255, 0.84);
}

.landing-page .ledger-row {
  border-top-color: rgba(8, 127, 112, 0.1);
  background: rgba(247, 250, 249, 0.88);
  color: rgba(18, 24, 23, 0.74);
}

.landing-page .ledger-head {
  color: rgba(18, 24, 23, 0.58);
  background: rgba(8, 127, 112, 0.08);
}

.landing-page .ledger-row strong {
  color: #121817;
}

.landing-page .assessment-panel p {
  color: rgba(18, 24, 23, 0.64);
}

.landing-page .source-window-bar {
  color: rgba(18, 24, 23, 0.62);
}

.landing-page .source-window-bar i {
  background: rgba(8, 127, 112, 0.28);
}

.landing-page .source-panel strong {
  color: #121817;
}

.landing-page .source-panel p {
  color: rgba(18, 24, 23, 0.64);
}

.landing-page .source-panel img {
  filter: saturate(0.98) contrast(1.02) brightness(1.03);
}

.landing-page .receipt-frame {
  top: 42%;
  right: 17%;
  width: min(230px, 16vw);
  padding: 5px;
  background: rgba(255, 255, 255, 0.74);
}

.landing-page .receipt-frame img {
  aspect-ratio: 1.49 / 1;
  object-fit: cover;
  object-position: center;
  border-radius: 8px;
  opacity: 1;
  filter: none;
}

.landing-page .scan-line {
  height: 2px;
  background: #18bfa4;
  box-shadow: none;
}

.landing-page .scan-box {
  border-color: rgba(8, 127, 112, 0.58);
  color: #ffffff;
  background: rgba(8, 127, 112, 0.82);
  box-shadow: 0 6px 18px rgba(8, 127, 112, 0.16);
}

.landing-page .ipa-flow {
  color: rgba(18, 24, 23, 0.72);
}

.landing-page .ipa-flow i {
  background: linear-gradient(90deg, rgba(8, 127, 112, 0.12), rgba(8, 127, 112, 0.58));
}

@media (min-width: 1181px) {
  .landing-page .optimization-section {
    width: min(1840px, calc(100vw - 96px));
    grid-template-columns: minmax(800px, 1fr) minmax(460px, 0.58fr);
    gap: clamp(42px, 3.6vw, 72px);
  }

  .landing-page .optimization-section .section-heading {
    order: 2;
    justify-self: start;
    max-width: 540px;
  }

  .landing-page .optimization-lab {
    order: 1;
    grid-template-columns: minmax(190px, 0.28fr) minmax(580px, 1fr);
    gap: 24px;
  }

  .landing-page .optimization-section .section-heading h2 {
    max-width: 10.5ch;
    font-size: clamp(44px, 4.1vw, 68px);
    line-height: 0.98;
  }

  .landing-page .optimization-section .section-heading p {
    max-width: 48ch;
  }

  .landing-page .lab-modules::before {
    left: 9px;
    background: linear-gradient(180deg, transparent, rgba(8, 127, 112, 0.2), transparent);
  }

  .landing-page .lab-modules article {
    min-height: 82px;
    padding: 16px 0 16px 32px;
    border-top: 0;
    border-bottom: 1px solid rgba(18, 24, 23, 0.1) !important;
    transition:
      color 180ms ease,
      background 180ms ease,
      transform 180ms ease,
      padding-left 180ms ease;
  }

  .landing-page .lab-modules article:last-child {
    border-bottom-color: rgba(18, 24, 23, 0.1) !important;
  }

  .landing-page .lab-modules article.is-selected,
  .landing-page .lab-modules article:hover,
  .landing-page .lab-modules article:focus-visible {
    padding-left: 36px;
  }
}

.landing-page .lab-console {
  display: grid;
  align-content: start;
  gap: 16px;
  min-height: clamp(620px, 64vh, 720px);
  padding: clamp(34px, 3vw, 52px);
  overflow: hidden;
}

.landing-page .lab-console::after {
  top: clamp(34px, 5vh, 58px);
  right: clamp(34px, 4vw, 58px);
  width: min(320px, 38%);
  height: auto;
  min-height: 146px;
  padding: 22px 24px;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}

.landing-page .lab-console-title {
  max-width: clamp(280px, 43%, 430px);
}

.landing-page .lab-console-text {
  max-width: clamp(280px, 43%, 39ch);
  margin-top: 4px;
  text-wrap: pretty;
  overflow-wrap: break-word;
}

.landing-page .model-pipeline {
  position: relative;
  left: auto;
  top: auto;
  width: min(460px, 52%);
  margin-top: 8px;
}

.landing-page .lab-console .effect-comparison {
  position: relative;
  right: auto;
  bottom: auto;
  width: min(620px, 88%);
  margin: clamp(28px, 4vh, 48px) auto 0;
}

@keyframes lab-console-swap {
  from {
    opacity: 0.35;
    transform: translateY(9px);
    filter: blur(4px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
  }
}

.landing-page .lab-console.is-switching .lab-console-title,
.landing-page .lab-console.is-switching .lab-console-text,
.landing-page .lab-console.is-switching .model-pipeline,
.landing-page .lab-console.is-switching .effect-comparison {
  animation: lab-console-swap 360ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

@media (max-width: 1180px) {
  .landing-page .lab-console-title,
  .landing-page .lab-console-text,
  .landing-page .model-pipeline,
  .landing-page .lab-console .effect-comparison {
    max-width: 100%;
    width: 100%;
  }

  .landing-page .lab-console::after {
    position: relative;
    inset: auto;
    width: 100%;
    margin-top: 10px;
  }
}

/* Header alignment pass: keep brand left and page tabs on the right. */
.landing-nav {
  justify-content: flex-start;
}

.landing-nav nav {
  margin-left: auto;
  gap: clamp(18px, 2.2vw, 34px);
}

@media (max-width: 760px) {
  .landing-nav {
    align-items: center;
    gap: 12px;
  }

  .landing-nav nav {
    order: 3;
    width: 100%;
    margin-left: 0;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 2px;
  }
}

/* Edge/layout hardening: image attributes must not stretch story media outside the frame. */
.landing-page .story-frame {
  isolation: isolate;
  overflow: hidden;
}

.landing-page .story-slide {
  visibility: hidden;
  pointer-events: none;
}

.landing-page .story-slide.is-selected {
  visibility: visible;
  pointer-events: auto;
}

.landing-page .story-student .story-receipt {
  left: 7%;
  top: 12%;
  width: min(310px, 33%);
  height: clamp(160px, 15vw, 220px);
  aspect-ratio: 1.56 / 1;
}

.landing-page .story-student .story-receipt img {
  width: 100%;
  height: 100%;
  aspect-ratio: auto;
  object-fit: cover;
  object-position: 50% 18%;
}

.landing-page .story-prototype {
  left: 10%;
  bottom: 8%;
  width: min(390px, 42%);
  height: clamp(190px, 20vw, 282px);
  aspect-ratio: 16 / 10;
}

.landing-page .story-prototype img {
  width: 100%;
  height: 100%;
  aspect-ratio: auto;
  object-fit: cover;
  object-position: 50% 10%;
}

.landing-page .story-student .story-card-main {
  top: 29%;
  right: 6%;
  bottom: auto;
  width: min(330px, 34%);
}

@media (max-width: 1180px) {
  .landing-page .story-student .story-receipt {
    width: min(340px, 42%);
    height: clamp(150px, 22vw, 230px);
  }

  .landing-page .story-prototype {
    width: min(430px, 50%);
    height: clamp(190px, 28vw, 290px);
  }
}

@media (max-width: 760px) {
  .landing-page .story-student .story-receipt {
    width: 72%;
    height: clamp(150px, 42vw, 230px);
  }

  .landing-page .story-prototype {
    width: auto;
    height: clamp(170px, 42vw, 250px);
  }

  .landing-page .story-student .story-card-main {
    width: auto;
  }
}

/* Teaching application final composition: balanced copy + interactive demo, no overflow. */
@media (min-width: 1181px) {
  .landing-page .faculty-section {
    width: min(1560px, calc(100vw - 128px));
    grid-template-columns: minmax(430px, 0.74fr) minmax(640px, 0.92fr);
    gap: clamp(56px, 5vw, 92px);
    align-items: start;
    padding-top: clamp(118px, 13vh, 158px);
  }

  .landing-page .faculty-section > .slide-copy {
    display: grid;
    gap: clamp(18px, 2vw, 28px);
    align-self: start;
    max-width: 620px;
    padding-top: clamp(4px, 1vh, 12px);
  }

  .landing-page .faculty-section > .slide-copy h2 {
    max-width: 11em;
    font-size: clamp(50px, 4.2vw, 72px);
    line-height: 1.05;
    letter-spacing: -0.028em;
  }

  .landing-page .faculty-section > .slide-copy p {
    max-width: 50ch;
  }

  .landing-page .faculty-section > .slide-copy .teaching-live-copy {
    width: min(520px, 100%);
    margin-top: clamp(18px, 3vh, 34px);
  }

  .landing-page .teaching-loop,
  .landing-page .teaching-material-stage {
    width: 100%;
  }
}

.landing-page .teaching-material-stage {
  min-height: 0;
  align-content: stretch;
  grid-template-rows: minmax(0, 1fr);
  gap: clamp(16px, 2vw, 22px);
  padding: clamp(22px, 2.2vw, 34px);
  border-color: rgba(255, 255, 255, 0.44);
  background:
    radial-gradient(circle at 18% 22%, rgba(255, 255, 255, 0.58), transparent 28%),
    linear-gradient(135deg, #8ed6ff 0%, #b9d1ff 36%, #2f39df 100%);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.12);
}

.landing-page .faculty-section > .slide-copy .teaching-live-copy {
  position: relative;
  z-index: 3;
  display: grid;
  gap: 10px;
  padding: clamp(18px, 2vw, 24px) 0 0;
  border-top: 1px solid rgba(0, 125, 112, 0.24);
}

.landing-page .faculty-section > .slide-copy .teaching-live-copy .landing-label {
  justify-self: start;
  margin-bottom: 0;
  background: rgba(0, 125, 112, 0.07);
}

.landing-page .faculty-section > .slide-copy .teaching-live-title {
  display: block;
  max-width: 11em;
  font-size: clamp(30px, 2.45vw, 44px);
  line-height: 1.08;
  letter-spacing: -0.024em;
}

.landing-page .faculty-section > .slide-copy .teaching-live-text {
  max-width: 50ch;
  margin-top: 0;
  color: rgba(5, 18, 16, 0.72);
  line-height: 1.64;
}

.landing-page .teaching-material-board {
  height: 100%;
  min-height: 0;
  gap: 14px;
}

.landing-page .teaching-material-tabs {
  justify-self: start;
  max-width: 100%;
  overflow-x: auto;
  scrollbar-width: none;
}

.landing-page .teaching-material-tabs::-webkit-scrollbar {
  display: none;
}

.landing-page .teaching-material-tabs button {
  position: relative;
  background: rgba(255, 255, 255, 0.76);
  transition:
    color 170ms ease,
    background 170ms ease,
    transform 170ms ease;
}

.landing-page .teaching-material-tabs button:hover,
.landing-page .teaching-material-tabs button:focus-visible {
  transform: translateY(-1px);
}

.landing-page .teaching-material-tabs button.is-active {
  box-shadow: inset 0 0 0 1px rgba(0, 31, 26, 0.08);
}

.landing-page .teaching-material-display {
  width: 100%;
  max-width: 100%;
  min-height: 0;
  height: clamp(460px, 42vw, 600px);
  aspect-ratio: auto;
  max-height: min(70vh, 620px);
  overflow: hidden;
  background: transparent;
  contain: paint;
}

.landing-page .teaching-demo-pane {
  gap: clamp(10px, 1.4vw, 16px);
  padding: clamp(18px, 2.2vw, 30px);
  overflow: hidden;
  transform: translateY(16px) scale(0.985);
}

.landing-page .teaching-demo-pane.is-active {
  transform: translateY(0) scale(1);
}

.landing-page .teaching-material-board.is-switching .teaching-demo-pane.is-active {
  animation: teaching-pane-enter 320ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes teaching-pane-enter {
  from {
    opacity: 0.25;
    transform: translateY(14px) scale(0.985);
    filter: blur(6px);
  }

  to {
    opacity: 1;
    transform: translateY(0) scale(1);
    filter: blur(0);
  }
}

.landing-page .demo-browser-bar {
  min-height: 38px;
  padding: 0 14px;
  border-radius: 8px;
}

.landing-page .student-demo-grid,
.landing-page .teacher-demo-grid,
.landing-page .optimization-demo-grid {
  min-height: 0;
  height: 100%;
  padding: clamp(14px, 1.8vw, 22px);
  border-radius: 10px;
  overflow: hidden;
}

.landing-page .student-demo-grid {
  grid-template-columns: minmax(180px, 0.82fr) minmax(250px, 1fr);
  grid-template-rows: minmax(0, 1fr) auto;
}

.landing-page .student-chat-demo {
  position: relative;
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  gap: 10px;
  width: min(640px, 100%);
  height: 100%;
  justify-self: center;
  min-width: 0;
  min-height: 0;
  padding: clamp(10px, 1.25vw, 16px);
  padding-top: clamp(34px, 3vw, 42px);
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 22px 48px rgba(16, 43, 92, 0.18);
}

.landing-page .student-chat-demo::before {
  content: "";
  position: absolute;
  top: 15px;
  left: 18px;
  z-index: 3;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: #ff5f57;
  box-shadow:
    17px 0 0 #febc2e,
    34px 0 0 #28c840;
}

.landing-page .student-chat-demo::after {
  content: "";
  position: absolute;
  top: 34px;
  right: 0;
  left: 0;
  z-index: 2;
  height: 1px;
  background: rgba(5, 18, 16, 0.07);
}

.landing-page .teaching-demo-pane[data-teaching-material="0"] {
  grid-template-rows: minmax(0, 1fr);
  padding: clamp(14px, 1.7vw, 24px);
}

.landing-page .demo-chat-scroll {
  display: grid;
  align-content: start;
  gap: 10px;
  min-width: 0;
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 2px 4px 4px;
  scrollbar-width: thin;
  scrollbar-color: rgba(0, 125, 112, 0.34) transparent;
}

.landing-page .demo-chat-scroll::-webkit-scrollbar {
  width: 8px;
}

.landing-page .demo-chat-scroll::-webkit-scrollbar-thumb {
  border-radius: 999px;
  background: rgba(0, 125, 112, 0.3);
}

.landing-page .demo-chat-message {
  display: grid;
  gap: 8px;
  min-width: 0;
  padding: 12px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 13px;
  background: #ffffff;
}

.landing-page .demo-chat-message-user {
  justify-items: end;
  margin-left: clamp(36px, 8vw, 110px);
  padding: 0;
  border: 0;
  background: transparent;
}

.landing-page .demo-chat-message-ai {
  margin-right: clamp(22px, 5vw, 70px);
  background: rgba(255, 255, 255, 0.98);
}

.landing-page .demo-message-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: rgba(5, 18, 16, 0.54);
  font-size: 12px;
  font-weight: 760;
}

.landing-page .demo-message-meta span {
  color: #06231e;
  font-weight: 850;
}

.landing-page .demo-message-meta em {
  min-width: 0;
  overflow: hidden;
  font-style: normal;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.landing-page .demo-chat-message p {
  margin: 0;
  color: rgba(5, 18, 16, 0.7);
  font-size: 13px;
  line-height: 1.58;
}

.landing-page .demo-message-image {
  width: clamp(76px, 8vw, 104px);
  aspect-ratio: 1.28 / 1;
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 13px;
  background: #ffffff;
  box-shadow: 0 8px 18px rgba(13, 42, 68, 0.1);
}

.landing-page .demo-message-image img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: 50% 18%;
  transform: scale(1.04);
}

.landing-page .demo-user-bubble {
  max-width: min(360px, 92%);
  padding: 14px 16px;
  border-radius: 19px;
  border-top-right-radius: 8px;
  background: #f1f1f1;
  color: #111817;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.02);
}

.landing-page .demo-user-bubble p {
  color: #111817;
  font-size: 15px;
  line-height: 1.5;
  font-weight: 520;
}

.landing-page .demo-message-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-right: 8px;
  color: rgba(5, 18, 16, 0.48);
  font-size: 12px;
  font-weight: 650;
}

.landing-page .demo-message-actions span {
  color: rgba(5, 18, 16, 0.42);
  font-size: 13px;
  line-height: 1;
}

.landing-page .demo-status-line {
  margin: 0 0 2px;
  padding: 2px 0 8px 2px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.07);
  color: rgba(5, 18, 16, 0.56);
  font-size: 12px;
  font-weight: 700;
}

.landing-page .demo-chat-input {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 8px;
  min-height: 68px;
  padding: 9px;
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 16px;
  background: #ffffff;
  box-shadow: 0 10px 22px rgba(13, 42, 68, 0.08);
}

.landing-page .demo-chat-input p {
  margin: 0;
  color: rgba(5, 18, 16, 0.76);
  font-size: 13px;
  line-height: 1.48;
  font-weight: 680;
}

.landing-page .demo-tool-button,
.landing-page .demo-access-pill,
.landing-page .demo-model-pill {
  display: inline-flex;
  align-items: center;
  min-width: 0;
  height: 28px;
  border-radius: 999px;
  color: rgba(5, 18, 16, 0.7);
  font-size: 12px;
  font-weight: 780;
}

.landing-page .demo-tool-button {
  width: 28px;
  justify-content: center;
  border: 1px solid rgba(0, 0, 0, 0.12);
  color: rgba(5, 18, 16, 0.58);
  font-size: 18px;
  font-weight: 420;
}

.landing-page .demo-send-button {
  justify-self: end;
  width: 34px;
  height: 34px;
  display: inline-grid;
  place-items: center;
  border: 0;
  border-radius: 999px;
  background: #071714;
  color: #ffffff;
  font-size: 20px;
  font-weight: 760;
  cursor: pointer;
  transition:
    background 170ms ease,
    transform 170ms ease,
    box-shadow 170ms ease;
}

.landing-page .demo-send-button:hover,
.landing-page .demo-send-button:focus-visible {
  background: #007d70;
  outline: none;
  transform: translateY(-1px);
  box-shadow: 0 10px 20px rgba(0, 125, 112, 0.24);
}

.landing-page .student-chat-demo.is-running .demo-send-button {
  background: #007d70;
  animation: demo-send-pulse 720ms ease both;
}

.landing-page .student-chat-demo.is-running .demo-ai-result {
  animation: demo-result-focus 820ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes demo-send-pulse {
  0% { transform: scale(1); }
  42% { transform: scale(0.9); }
  100% { transform: scale(1); }
}

@keyframes demo-result-focus {
  0% {
    border-color: rgba(0, 131, 112, 0.12);
    box-shadow: 0 0 0 rgba(0, 131, 112, 0);
  }

  38% {
    border-color: rgba(0, 131, 112, 0.58);
    box-shadow: 0 0 0 5px rgba(143, 255, 231, 0.32);
  }

  100% {
    border-color: rgba(0, 0, 0, 0.1);
    box-shadow: none;
  }
}

.landing-page .demo-upload-drop,
.landing-page .demo-voucher-sheet,
.landing-page .demo-review-note,
.landing-page .demo-score-card,
.landing-page .demo-dimensions,
.landing-page .demo-teacher-comment,
.landing-page .demo-optimization-stack > div {
  min-width: 0;
  min-height: 0;
}

.landing-page .demo-upload-drop {
  padding: clamp(16px, 2vw, 24px);
}

.landing-page .demo-upload-drop strong {
  font-size: clamp(19px, 1.55vw, 25px);
}

.landing-page .demo-voucher-sheet {
  padding: clamp(12px, 1.25vw, 15px);
  overflow: hidden;
}

.landing-page .demo-ai-result {
  align-self: stretch;
}

.landing-page .demo-voucher-summary {
  margin: 8px 0 0;
  color: rgba(5, 18, 16, 0.58);
  font-size: 12px;
  line-height: 1.38;
}

.landing-page .demo-voucher-sheet table {
  margin-top: 8px;
  font-size: clamp(12px, 0.88vw, 14px);
}

.landing-page .demo-voucher-sheet td {
  padding: 7px 5px;
}

.landing-page .demo-review-note {
  padding: 12px 14px;
}

.landing-page .demo-student-reflection {
  align-self: end;
}

.landing-page .teacher-demo-grid {
  grid-template-columns: minmax(150px, 0.42fr) minmax(0, 1fr);
  grid-template-rows: minmax(0, 1fr) auto;
}

.landing-page .demo-score-card {
  padding: clamp(16px, 1.8vw, 22px);
}

.landing-page .demo-score-card strong {
  font-size: clamp(48px, 5vw, 72px);
}

.landing-page .demo-dimensions {
  gap: 10px;
  padding: clamp(14px, 1.6vw, 18px);
}

.landing-page .demo-dimensions div {
  grid-template-columns: minmax(62px, 80px) minmax(60px, 1fr) 48px;
}

.landing-page .optimization-demo-grid {
  grid-template-columns: minmax(0, 1fr) minmax(190px, 0.58fr);
}

.landing-page .optimization-demo-grid figure {
  min-height: 0;
  height: 100%;
}

.landing-page .optimization-demo-grid img {
  height: 100%;
  object-fit: cover;
}

@media (max-width: 1180px) {
  .landing-page .faculty-section {
    align-items: stretch;
  }

  .landing-page .teaching-material-display {
    height: auto;
    min-height: clamp(430px, 58vw, 620px);
    max-height: none;
  }
}

@media (max-width: 760px) {
  .landing-page .teaching-material-display {
    aspect-ratio: auto;
    min-height: 680px;
  }

  .landing-page .student-demo-grid,
  .landing-page .teacher-demo-grid,
  .landing-page .optimization-demo-grid {
    grid-template-columns: 1fr;
    grid-template-rows: none;
    height: auto;
    max-height: none;
  }

  .landing-page .demo-upload-drop,
  .landing-page .demo-score-card {
    grid-row: auto;
  }

  .landing-page .student-chat-demo {
    grid-template-columns: 1fr;
    width: 100%;
  }

  .landing-page .teacher-review-window {
    min-height: 600px;
  }

  .landing-page .teacher-review-workspace {
    inset: 40px 14px 166px;
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto auto;
    gap: 10px;
    overflow: auto;
  }

  .landing-page .teacher-review-score-focus,
  .landing-page .teacher-review-dimension-focus {
    grid-column: 1;
    grid-row: auto;
    width: auto;
  }

  .landing-page .teacher-review-detail-stack,
  .landing-page .teacher-review-note {
    grid-column: 1;
    grid-row: auto;
  }

  .landing-page .teacher-review-score-focus {
    padding: 14px 16px;
  }

  .landing-page .teacher-review-score-focus strong {
    font-size: 46px;
  }

  .landing-page .teacher-review-dimension-focus {
    grid-template-columns: 1fr;
    padding: 14px 16px;
  }

  .landing-page .teacher-review-row {
    grid-template-columns: minmax(58px, 80px) minmax(64px, 1fr) auto;
  }

  .landing-page .teacher-review-hotspots {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    right: 14px;
    bottom: 14px;
    left: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .landing-page .teaching-material-board.is-switching .teaching-demo-pane.is-active {
    animation: none;
  }

  .landing-page .teaching-demo-pane,
  .landing-page .teaching-material-tabs button,
  .landing-page .teacher-review-window,
  .landing-page .teacher-review-hotspots button,
  .landing-page .teacher-focus-meter i::before {
    transition: none;
  }

  .landing-page .teacher-review-lens.is-refocusing .teacher-review-dimension-focus {
    animation: none;
  }
}

/* Hero stage collision fix: keep first-screen floating evidence cards separated. */
@media (min-width: 1181px) {
  .landing-page .cinematic-stage {
    width: min(980px, 54vw);
    inset: clamp(112px, 12vh, 150px) clamp(44px, 4.4vw, 76px) clamp(132px, 18vh, 190px) auto;
  }

  .landing-page .dashboard-panel {
    top: 3%;
    right: 0.5%;
    width: min(640px, 39vw);
    z-index: 1;
  }

  .landing-page .assessment-panel {
    top: 37%;
    right: 2%;
    width: min(330px, 20vw);
    z-index: 5;
  }

  .landing-page .voucher-panel {
    top: 66.5%;
    right: 4.5%;
    width: min(360px, 22vw);
    z-index: 4;
  }

  .landing-page .source-panel {
    top: 55%;
    right: 43%;
    width: min(322px, 19.5vw);
    z-index: 3;
  }

  .landing-page .receipt-frame {
    top: 42%;
    right: 57.5%;
    width: min(190px, 11vw);
    aspect-ratio: 1.49 / 1;
    height: auto;
    overflow: hidden;
    z-index: 6;
    opacity: calc(var(--hero-fade) * 0.9);
  }

  .landing-page .receipt-frame img {
    display: block;
    width: 100%;
    height: 100%;
    aspect-ratio: auto;
    object-fit: cover;
    object-position: 50% 18%;
  }

  .landing-page .ipa-flow {
    right: 5.5%;
    bottom: 2%;
    z-index: 7;
  }
}

@media (min-width: 1181px) and (max-width: 1480px) {
  .landing-page .cinematic-stage {
    width: min(930px, 57vw);
  }

  .landing-page .dashboard-panel {
    width: min(560px, 37vw);
  }

  .landing-page .assessment-panel {
    right: 1.5%;
    width: min(292px, 19.5vw);
  }

  .landing-page .voucher-panel {
    right: 3.2%;
    width: min(318px, 21vw);
  }

  .landing-page .source-panel {
    right: 42%;
    width: min(292px, 19.5vw);
  }

  .landing-page .receipt-frame {
    right: 56%;
    width: min(166px, 10vw);
  }
}

/* Hero copy readability: use the product accent instead of high-chroma mint on white. */
.landing-page .hero-kicker {
  color: #13756d;
}

/* Hero depth beams: restore a subtle full-width 3D motion layer behind cards. */
@media (min-width: 1181px) {
  .landing-page .teaching-hero .hero-copy {
    align-self: center;
    transform: translateY(clamp(18px, 4vh, 42px));
  }

  .landing-page .teaching-hero .cinematic-stage {
    overflow: visible;
  }

  .landing-page .teaching-hero .stage-beams {
    position: absolute;
    top: -10vh;
    right: -8vw;
    bottom: auto;
    left: auto;
    z-index: 0;
    display: block;
    width: 172vw;
    height: 96vh;
    overflow: visible;
    pointer-events: none;
    perspective: 1500px;
    transform: translate3d(18vw, 0, -180px) rotateX(58deg) rotateZ(-7.5deg);
    transform-origin: 62% 42%;
    opacity: 0.46;
    mix-blend-mode: normal;
    -webkit-mask-image: linear-gradient(90deg, rgba(0, 0, 0, 0.18) 0%, rgba(0, 0, 0, 0.42) 28%, #000 48%, #000 100%);
    mask-image: linear-gradient(90deg, rgba(0, 0, 0, 0.18) 0%, rgba(0, 0, 0, 0.42) 28%, #000 48%, #000 100%);
  }

  .landing-page .teaching-hero .stage-beam {
    position: absolute;
    display: block;
    height: 1px;
    border-radius: 999px;
    background: linear-gradient(
      90deg,
      transparent 0%,
      rgba(19, 117, 109, 0.018) 14%,
      rgba(19, 117, 109, 0.14) 52%,
      rgba(19, 117, 109, 0.035) 82%,
      transparent 100%
    );
    box-shadow: none;
    transform-origin: center;
    animation: hero-beam-depth 12s cubic-bezier(0.16, 1, 0.3, 1) infinite alternate;
    will-change: transform, opacity;
  }

  .landing-page .teaching-hero .beam-primary {
    --beam-drift-x: 42px;
    --beam-drift-y: 12px;
    top: 32%;
    left: 0;
    width: 100%;
    height: 2px;
    opacity: 0.22;
  }

  .landing-page .teaching-hero .beam-secondary {
    --beam-drift-x: -28px;
    --beam-drift-y: 8px;
    top: 21%;
    left: 8%;
    width: 92%;
    opacity: 0.12;
    animation-duration: 15s;
  }

  .landing-page .teaching-hero .beam-tertiary {
    --beam-drift-x: 34px;
    --beam-drift-y: -10px;
    top: 47%;
    left: -7%;
    width: 108%;
    opacity: 0.08;
    animation-duration: 18s;
  }

  .landing-page .teaching-hero .beam-quaternary {
    --beam-drift-x: -22px;
    --beam-drift-y: 16px;
    top: 61%;
    left: 12%;
    width: 86%;
    opacity: 0.055;
    animation-duration: 21s;
  }

  .landing-page .teaching-hero .beam-faint {
    --beam-drift-x: 26px;
    --beam-drift-y: -8px;
    top: 74%;
    left: 4%;
    width: 98%;
    opacity: 0.04;
    animation-duration: 24s;
  }

  .landing-page .teaching-hero .scene-panel,
  .landing-page .teaching-hero .receipt-frame,
  .landing-page .teaching-hero .ipa-flow {
    transform-style: preserve-3d;
  }
}

@keyframes hero-beam-depth {
  0% {
    transform: translate3d(calc(var(--beam-shift, 0px) - var(--beam-drift-x, 24px)), calc(var(--beam-drift-y, 10px) * -0.45), -40px);
  }
  100% {
    transform: translate3d(calc(var(--beam-shift, 0px) + var(--beam-drift-x, 24px)), var(--beam-drift-y, 10px), -40px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .landing-page .teaching-hero .stage-beam {
    animation: none;
  }
}

/* Reveal animation for native scrolling sections. */

.landing-page .landing-slide .slide-copy,
.landing-page .landing-slide .platform-interactive,
.landing-page .landing-slide .optimization-lab,
.landing-page .landing-slide .teaching-loop,
.landing-page .landing-slide .effect-comparison {
  transition:
    opacity 520ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 660ms cubic-bezier(0.16, 1, 0.3, 1);
}

.landing-page .landing-slide.is-active .platform-interactive,
.landing-page .landing-slide.is-active .optimization-lab,
.landing-page .landing-slide.is-active .teaching-loop {
  transition-delay: 40ms;
}

.landing-page .landing-slide:target .slide-copy,
.landing-page .landing-slide:target .platform-interactive,
.landing-page .landing-slide:target .optimization-lab,
.landing-page .landing-slide:target .teaching-loop,
.landing-page .landing-slide:target .effect-comparison {
  opacity: 1;
  transform: none;
}

/* Problem slide readability: keep comparison headers horizontal and give copy a clearer reading column. */
@media (min-width: 1181px) {
  .landing-page .optimization-section {
    grid-template-columns: minmax(900px, 1.12fr) minmax(500px, 0.58fr);
    gap: clamp(54px, 4.8vw, 94px);
  }

  .landing-page .optimization-section .section-heading {
    display: flex;
    flex-direction: column;
    align-self: center;
    justify-self: start;
    gap: 0;
    max-width: 580px;
    padding-top: clamp(8px, 1.2vh, 18px);
  }

  .landing-page .optimization-section .section-heading .landing-label {
    margin-bottom: 18px;
  }

  .landing-page .optimization-section .section-heading h2 {
    max-width: 12ch;
    margin: 0 0 26px;
    font-size: clamp(48px, 3.9vw, 66px);
    line-height: 1.02;
    letter-spacing: -0.024em;
    text-wrap: balance;
  }

  .landing-page .optimization-section .section-heading h2 span {
    display: block;
    white-space: nowrap;
    word-break: keep-all;
  }

  .landing-page .optimization-section .section-heading p {
    max-width: 51ch;
    margin: 0;
    color: #5d6874;
    font-size: 16px;
    line-height: 1.9;
    text-wrap: pretty;
  }

  .landing-page .optimization-section .section-heading p + p {
    margin-top: 18px;
  }

  .landing-page .optimization-lab {
    grid-template-columns: minmax(210px, 0.28fr) minmax(620px, 1fr);
    gap: 30px;
  }

  .landing-page .lab-console {
    padding: clamp(34px, 3vw, 48px);
  }

  .landing-page .lab-console-title,
  .landing-page .lab-console-text {
    max-width: min(39ch, calc(100% - 390px));
  }

  .landing-page .lab-console-text {
    min-width: 280px;
  }

  .landing-page .lab-console .comparison-table {
    grid-template-columns: minmax(160px, 1fr) minmax(124px, 0.72fr) minmax(158px, 0.82fr);
  }

  .landing-page .comparison-cell {
    line-height: 1.3;
  }

  .landing-page .lab-console .comparison-cell {
    padding: 9px 12px;
  }

  .landing-page .comparison-cell.is-header {
    flex-direction: column;
    gap: 2px;
    white-space: nowrap;
    word-break: keep-all;
  }

  .landing-page .comparison-cell.is-header span {
    max-width: 100%;
    white-space: normal;
    word-break: keep-all;
  }
}

/* Platform background student panel: remove the receipt-photo focus and use a clearer workflow composition. */
.landing-page .story-intake-panel {
  position: absolute;
  z-index: 4;
  left: 7%;
  top: 11%;
  width: min(360px, 34%);
  padding: 26px;
  color: #111817;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(5, 18, 16, 0.1);
  border-radius: 10px;
  box-shadow: 0 18px 40px rgba(5, 18, 16, 0.08);
}

.landing-page .story-intake-label {
  display: block;
  margin-bottom: 10px;
  color: #007d70;
  font-size: 13px;
  font-weight: 700;
}

.landing-page .story-intake-panel strong {
  display: block;
  max-width: 13ch;
  margin-bottom: 22px;
  font-size: clamp(24px, 2vw, 34px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  text-wrap: balance;
}

.landing-page .story-intake-steps {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: intake-step;
}

.landing-page .story-intake-steps li {
  position: relative;
  display: grid;
  gap: 3px;
  padding-left: 34px;
  counter-increment: intake-step;
}

.landing-page .story-intake-steps li::before {
  content: counter(intake-step);
  position: absolute;
  left: 0;
  top: 1px;
  display: inline-grid;
  width: 22px;
  height: 22px;
  place-items: center;
  border-radius: 999px;
  color: #007d70;
  background: rgba(0, 131, 112, 0.1);
  font-size: 12px;
  font-weight: 800;
}

.landing-page .story-intake-steps span {
  color: rgba(5, 18, 16, 0.5);
  font-size: 12px;
  font-weight: 700;
}

.landing-page .story-intake-steps b {
  color: #111817;
  font-size: 15px;
  line-height: 1.35;
}

.landing-page .story-student .story-prototype {
  left: auto;
  right: 6%;
  top: 10%;
  bottom: auto;
  width: min(520px, 48%);
  height: clamp(190px, 20vw, 260px);
}

.landing-page .story-student .story-card-main {
  top: auto;
  right: 8%;
  bottom: 9%;
  width: min(390px, 38%);
}

@media (max-width: 1180px) {
  .landing-page .story-intake-panel {
    left: 7%;
    top: 10%;
    width: min(360px, 40%);
    padding: 22px;
  }

  .landing-page .story-student .story-prototype {
    right: 7%;
    top: 12%;
    width: min(440px, 48%);
    height: clamp(180px, 24vw, 250px);
  }
}

@media (max-width: 760px) {
  .landing-page .story-intake-panel {
    left: 8%;
    right: 8%;
    top: 7%;
    width: auto;
    padding: 20px;
  }

  .landing-page .story-intake-panel strong {
    max-width: none;
    margin-bottom: 16px;
    font-size: 24px;
  }

  .landing-page .story-intake-steps {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .landing-page .story-student .story-prototype {
    left: 8%;
    right: 8%;
    top: 47%;
    width: auto;
    height: clamp(150px, 34vw, 220px);
  }

  .landing-page .story-student .story-card-main {
    left: 8%;
    right: 8%;
    bottom: 5%;
    width: auto;
  }
}

/* Platform story student view: one clean product lens instead of stacked explanatory widgets. */
.landing-page .story-student {
  overflow: hidden;
}

.landing-page .student-workbench-shot {
  position: absolute;
  z-index: 2;
  left: 7%;
  top: 9%;
  width: min(670px, 64%);
  height: min(430px, 72%);
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(17, 24, 22, 0.1);
  border-radius: 14px;
  background: #ffffff;
  box-shadow: 0 18px 42px rgba(17, 24, 22, 0.11);
}

.landing-page .student-workbench-shot::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.08) 54%, rgba(255, 255, 255, 0.72) 100%),
    linear-gradient(180deg, transparent 63%, rgba(255, 255, 255, 0.78) 100%);
}

.landing-page .student-workbench-shot img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 32%;
  filter: saturate(0.96) contrast(1.02) brightness(1.01);
}

.landing-page .student-workbench-shot figcaption {
  position: absolute;
  left: 16px;
  top: 14px;
  z-index: 2;
  padding: 6px 10px;
  border: 1px solid rgba(0, 125, 112, 0.12);
  border-radius: 999px;
  color: #005b52;
  background: rgba(255, 255, 255, 0.88);
  font-size: 12px;
  font-weight: 800;
}

.landing-page .student-ledger-card,
.landing-page .student-review-bubble {
  position: absolute;
  z-index: 4;
  border: 1px solid rgba(17, 24, 22, 0.1);
  border-radius: 14px;
  color: #111817;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 16px 34px rgba(17, 24, 22, 0.1);
  backdrop-filter: blur(10px);
}

.landing-page .student-ledger-card {
  right: 6%;
  bottom: 11%;
  width: min(390px, 38%);
  padding: 18px;
}

.landing-page .student-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.landing-page .student-card-head span,
.landing-page .student-review-bubble span {
  color: rgba(5, 18, 16, 0.58);
  font-size: 12px;
  font-weight: 800;
}

.landing-page .student-card-head strong {
  color: #007d70;
  font-size: 13px;
}

.landing-page .student-ledger-card p {
  margin: 0 0 12px;
  color: rgba(5, 18, 16, 0.64);
  font-size: 13px;
  line-height: 1.5;
}

.landing-page .student-ledger-card dl {
  display: grid;
  gap: 0;
  margin: 0;
}

.landing-page .student-ledger-card dl div {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  min-height: 34px;
  border-top: 1px solid rgba(17, 24, 22, 0.08);
  font-size: 13px;
}

.landing-page .student-ledger-card dt {
  color: rgba(5, 18, 16, 0.52);
  font-weight: 700;
}

.landing-page .student-ledger-card dd {
  min-width: 0;
  margin: 0;
  overflow: hidden;
  color: #172522;
  font-weight: 760;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.landing-page .student-ledger-card dl strong {
  color: #007d70;
  font-size: 13px;
}

.landing-page .student-review-bubble {
  left: 11%;
  bottom: 10%;
  width: min(330px, 32%);
  padding: 16px 18px;
}

.landing-page .student-review-bubble p {
  margin: 6px 0 0;
  color: rgba(5, 18, 16, 0.76);
  font-size: 14px;
  line-height: 1.58;
}

@media (max-width: 1180px) {
  .landing-page .student-workbench-shot {
    left: 6%;
    top: 9%;
    width: 66%;
    height: 58%;
  }

  .landing-page .student-ledger-card {
    right: 6%;
    bottom: 10%;
    width: min(360px, 43%);
  }

  .landing-page .student-review-bubble {
    left: 8%;
    bottom: 12%;
    width: min(300px, 36%);
  }
}

@media (max-width: 760px) {
  .landing-page .platform-section.light-story-section .story-frame {
    min-height: 650px;
  }

  .landing-page .student-workbench-shot {
    left: 7%;
    right: 7%;
    top: 7%;
    width: auto;
    height: 33%;
  }

  .landing-page .student-ledger-card {
    left: 7%;
    right: 7%;
    bottom: 6%;
    width: auto;
    padding: 14px;
  }

  .landing-page .student-review-bubble {
    left: 9%;
    right: 9%;
    bottom: 41%;
    width: auto;
  }
}

/* Accepted hero rhythm pass: reduce the hollow top band and calm the type scale. */
@media (min-width: 1181px) {
  .landing-page .teaching-hero .hero-copy {
    max-width: min(610px, 50vw);
    padding-bottom: clamp(210px, 23vh, 286px);
    transform: translateY(clamp(-286px, -20vh, -220px));
  }

  .landing-page .hero-kicker {
    margin-bottom: 14px;
    font-size: 13px;
    line-height: 1.45;
  }

  .landing-page .hero-copy h1 {
    max-width: 12em;
    font-size: clamp(44px, 3.55vw, 54px);
    line-height: 1.08;
    font-weight: 740;
    letter-spacing: -0.024em;
  }

  .landing-page .hero-lede {
    max-width: 41ch;
    font-size: clamp(18px, 1.08vw, 20px);
    line-height: 1.78;
  }

  .landing-page .platform-section .section-heading h2 {
    font-size: clamp(48px, 3.2vw, 56px);
    line-height: 1.08;
    letter-spacing: -0.022em;
  }

  .landing-page .optimization-section .section-heading h2 {
    font-size: clamp(44px, 3.35vw, 58px);
    line-height: 1.06;
    letter-spacing: -0.02em;
  }

  .landing-page .faculty-section > .slide-copy h2 {
    font-size: clamp(48px, 3.55vw, 64px);
    line-height: 1.08;
    letter-spacing: -0.022em;
  }
}

@media (min-width: 761px) and (max-width: 1180px) {
  .landing-page .hero-copy h1 {
    font-size: clamp(38px, 4.1vw, 44px);
    line-height: 1.08;
    letter-spacing: -0.022em;
  }

  .landing-page .hero-lede {
    max-width: 42ch;
    font-size: 17px;
    line-height: 1.78;
  }
}

@media (max-width: 760px) {
  .landing-page .teaching-hero {
    display: flex;
    flex-direction: column;
    min-height: auto;
    padding: 92px 18px 0;
  }

  .landing-page .teaching-hero .hero-copy {
    order: 1;
    width: 100%;
    max-width: none;
    padding-bottom: 0;
  }

  .landing-page .teaching-hero .cinematic-stage {
    order: 2;
    width: 100%;
    height: 300px;
    margin: 34px 0 0;
  }

  .landing-page .teaching-hero .hero-metrics {
    order: 3;
    width: 100%;
    margin: 28px 0 0;
    transform: none;
  }

  .landing-page .hero-kicker {
    margin-bottom: 12px;
    font-size: 12px;
    line-height: 1.5;
  }

  .landing-page .hero-copy h1 {
    max-width: 100%;
    font-size: clamp(31px, 8.6vw, 36px);
    line-height: 1.12;
    letter-spacing: -0.018em;
    white-space: normal;
    text-wrap: balance;
  }

  .landing-page .hero-lede {
    max-width: 100%;
    margin-top: 18px;
    font-size: 15.5px;
    line-height: 1.72;
  }

  .landing-page .hero-actions {
    margin-top: 24px;
  }
}

/* Stabilization pass: keep the accepted light visual system with native scrolling. */
.landing-page,
.landing-page .landing-main {
  background: var(--oa-bg);
}

.landing-page .landing-slide {
  isolation: isolate;
}

.landing-page .landing-slide .slide-copy,
.landing-page .landing-slide .platform-interactive,
.landing-page .landing-slide .optimization-lab,
.landing-page .landing-slide .teaching-loop,
.landing-page .landing-slide .effect-comparison,
.landing-page .scene-panel,
.landing-page .receipt-frame,
.landing-page .student-workbench-shot,
.landing-page .student-ledger-card,
.landing-page .student-review-bubble,
.landing-page .teacher-review-window {
  backface-visibility: hidden;
}

.landing-page .landing-slide.is-active .slide-copy,
.landing-page .landing-slide.is-active .platform-interactive,
.landing-page .landing-slide.is-active .optimization-lab,
.landing-page .landing-slide.is-active .teaching-loop,
.landing-page .landing-slide.is-active .effect-comparison {
  will-change: opacity, transform;
}

@supports not (overflow: clip) {
  .landing-main {
    overflow-x: hidden;
  }
}

/* Hero final correction: remove the colored wash and restore a complete, centered title block. */
@media (min-width: 1181px) {
  .landing-page .teaching-hero .hero-copy {
    align-self: end;
    max-width: min(610px, 50vw);
    padding-bottom: clamp(168px, 20vh, 236px);
    transform: none;
  }

  .landing-page .teaching-hero .cinematic-stage {
    background: transparent;
    box-shadow: none;
    filter: none;
    overflow: visible;
  }

  .landing-page .teaching-hero .stage-grid,
  .landing-page .teaching-hero .stage-beams {
    display: none;
  }

  .landing-page .teaching-hero .scene-panel,
  .landing-page .teaching-hero .receipt-frame,
  .landing-page .teaching-hero .ipa-flow {
    background: rgba(255, 255, 255, 0.78);
    box-shadow: 0 18px 34px rgba(17, 24, 22, 0.08);
    backdrop-filter: none;
  }

  .landing-page .teaching-hero::before,
  .landing-page .teaching-hero::after,
  .landing-page .teaching-hero .cinematic-stage::before,
  .landing-page .teaching-hero .cinematic-stage::after {
    content: none;
    display: none;
    background: none;
  }
}

/* Hero viewport glow fix: keep the first screen on a clean white canvas at every desktop width. */
.landing-page .teaching-hero {
  background: #fff;
}

.landing-page .teaching-hero::before,
.landing-page .teaching-hero::after,
.landing-page .teaching-hero .cinematic-stage::before,
.landing-page .teaching-hero .cinematic-stage::after {
  content: none !important;
  display: none !important;
  background: none !important;
  box-shadow: none !important;
  filter: none !important;
}

.landing-page .teaching-hero .cinematic-stage {
  background: transparent !important;
  border-color: transparent !important;
  box-shadow: none !important;
  filter: none !important;
}

.landing-page .teaching-hero .stage-grid {
  display: none !important;
}

.landing-page .teaching-hero .stage-beams {
  opacity: 0.22;
  mix-blend-mode: multiply;
}

.landing-page .teaching-hero .stage-beam {
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(19, 117, 109, 0.012) 14%,
    rgba(19, 117, 109, 0.11) 54%,
    rgba(19, 117, 109, 0.024) 84%,
    transparent 100%
  );
  box-shadow: none !important;
}

/* Hero layout contract: keep copy and the bottom metrics strip separated by fixed tokens. */
@media (min-width: 761px) {
  .landing-page .teaching-hero {
    --hero-metrics-height: 138px;
    --hero-copy-gap: 128px;
    min-height: 100svh;
    padding-bottom: calc(var(--hero-metrics-height) + var(--hero-copy-gap));
    align-items: end;
  }

  .landing-page .teaching-hero .hero-copy {
    align-self: end;
    padding-bottom: 0;
    margin-bottom: 0;
    transform: none;
  }

  .landing-page .teaching-hero .hero-metrics {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    width: auto;
    min-height: var(--hero-metrics-height);
    margin: 0;
    transform: none;
  }
}

@media (min-width: 1181px) {
  .landing-page .teaching-hero .hero-copy {
    margin-left: clamp(78px, 8vw, 150px);
  }

  .landing-page .teaching-hero .cinematic-stage {
    inset: clamp(118px, 13vh, 156px) clamp(128px, 8vw, 184px) clamp(112px, 15vh, 154px) auto;
    width: min(820px, 46vw);
  }
}

/* Slide density correction: keep each PPT screen filled without changing content. */
@media (min-width: 1181px) {
  .landing-page .platform-section.light-story-section,
  .landing-page .optimization-section,
  .landing-page .faculty-section {
    min-height: 100svh;
    align-content: center;
    align-items: center;
    padding-top: clamp(58px, 6.2vh, 86px);
    padding-bottom: clamp(58px, 6.2vh, 86px);
  }

  .landing-page .platform-section.light-story-section {
    grid-template-columns: minmax(340px, 500px) minmax(720px, 1fr);
  }

  .landing-page .platform-section.light-story-section .openai-style-showcase {
    align-items: center;
  }

  .landing-page .platform-section.light-story-section .story-frame {
    min-height: clamp(560px, 58vh, 720px);
  }

  .landing-page .showcase-tabs {
    min-height: clamp(390px, 46vh, 500px);
  }

  .landing-page .optimization-lab,
  .landing-page .teaching-material-board {
    align-self: center;
  }
}

@media (min-width: 1440px) {
  .landing-page .platform-section.light-story-section .story-frame {
    min-height: clamp(600px, 60vh, 760px);
  }
}

/* Compact desktop bridge: DPI-scaled Edge can report 960-1180 CSS px.
   Keep PPT slides as dense desktop compositions instead of tall tablet stacks. */
@media (min-width: 960px) and (max-width: 1180px) {
  .landing-page .platform-section.light-story-section,
  .landing-page .optimization-section,
  .landing-page .faculty-section {
    width: min(1120px, calc(100vw - 48px));
    min-height: 100svh;
    align-content: center;
    align-items: center;
    padding-top: clamp(46px, 5vh, 68px);
    padding-bottom: clamp(42px, 4.6vh, 62px);
  }

  .landing-page .platform-section.light-story-section {
    grid-template-columns: minmax(300px, 0.44fr) minmax(600px, 1fr);
    gap: clamp(24px, 3vw, 36px);
  }

  .landing-page .platform-section.light-story-section .openai-style-showcase {
    display: grid;
    grid-template-columns: minmax(176px, 216px) minmax(0, 1fr);
    gap: 20px;
    align-items: center;
  }

  .landing-page .showcase-tabs {
    display: flex;
    flex-direction: column;
    min-height: clamp(320px, 37vh, 410px);
    background: transparent;
  }

  .landing-page .showcase-tabs button {
    box-sizing: border-box;
    flex: 1 1 0;
    min-height: 0;
    height: auto;
    padding: 12px 0;
    border: 0;
    border-top: 1px solid var(--oa-line);
    background: transparent;
  }

  .landing-page .showcase-tabs button:last-child {
    border-bottom: 1px solid var(--oa-line);
  }

  .landing-page .showcase-tabs button:hover,
  .landing-page .showcase-tabs button:focus-visible {
    flex-grow: 1.55;
  }

  .landing-page .story-frame {
    min-height: clamp(430px, 48vh, 540px);
  }

  .landing-page .optimization-section {
    grid-template-columns: minmax(590px, 1fr) minmax(330px, 0.56fr);
    gap: clamp(26px, 3vw, 40px);
  }

  .landing-page .optimization-section .section-heading {
    order: 2;
    justify-self: start;
    max-width: 430px;
  }

  .landing-page .optimization-section .section-heading h2 {
    max-width: 11.5ch;
    font-size: clamp(38px, 4vw, 50px);
    line-height: 1.04;
  }

  .landing-page .optimization-section .section-heading p {
    max-width: 46ch;
    font-size: 14px;
    line-height: 1.68;
  }

  .landing-page .optimization-section .section-heading p + p {
    margin-top: 14px;
  }

  .landing-page .optimization-lab {
    order: 1;
    grid-template-columns: minmax(150px, 0.28fr) minmax(0, 1fr);
    gap: 18px;
    align-self: center;
  }

  .landing-page .lab-modules article {
    padding: 11px 0 12px 18px;
  }

  .landing-page .lab-console {
    min-height: 0;
    padding: 28px 30px;
  }

  .landing-page .model-pipeline {
    max-width: min(100%, 390px);
  }

  .landing-page .optimization-result-card {
    width: min(100%, 460px);
  }

  .landing-page .faculty-section {
    grid-template-columns: minmax(330px, 0.55fr) minmax(560px, 1fr);
    grid-template-areas: "copy loop";
    gap: clamp(30px, 3.5vw, 46px);
  }

  .landing-page .faculty-section > .slide-copy {
    grid-area: copy;
    align-self: center;
  }

  .landing-page .faculty-section > .slide-copy h2 {
    font-size: clamp(40px, 4vw, 52px);
    line-height: 1.08;
  }

  .landing-page .faculty-section > .slide-copy p {
    max-width: 45ch;
  }

  .landing-page .faculty-section > .slide-copy .teaching-live-copy {
    width: min(460px, 100%);
    margin-top: clamp(14px, 2vh, 24px);
  }

  .landing-page .teaching-loop {
    grid-area: loop;
    align-self: center;
  }

  .landing-page .teaching-material-board {
    width: 100%;
  }

  .landing-page .teaching-material-display {
    height: clamp(460px, 50vh, 600px);
  }
}

/* Wide desktop priority: keep each controlled slide visually filled and centered. */
@media (min-width: 1181px) {
  .landing-page .platform-section.light-story-section,
  .landing-page .optimization-section,
  .landing-page .faculty-section {
    width: min(1640px, calc(100vw - 96px));
    min-height: 100svh;
    box-sizing: border-box;
    align-content: center;
    align-items: center;
    padding-top: clamp(38px, 4.8vh, 66px);
    padding-bottom: clamp(38px, 4.8vh, 66px);
  }

  .landing-page .platform-section.light-story-section {
    grid-template-columns: minmax(380px, 0.48fr) minmax(760px, 1fr);
    gap: clamp(42px, 4.8vw, 76px);
  }

  .landing-page .platform-section.light-story-section .story-frame {
    min-height: clamp(620px, 64vh, 820px);
  }

  .landing-page .optimization-section {
    grid-template-columns: minmax(820px, 1.04fr) minmax(470px, 0.58fr);
    gap: clamp(48px, 4.8vw, 84px);
  }

  .landing-page .optimization-lab {
    align-self: center;
    min-height: clamp(650px, 66vh, 820px);
  }

  .landing-page .faculty-section {
    grid-template-columns: minmax(430px, 0.56fr) minmax(700px, 1fr);
    gap: clamp(44px, 4.8vw, 82px);
  }

  .landing-page .teaching-material-display {
    height: clamp(620px, 64vh, 800px);
  }
}

@media (min-width: 1181px) and (max-height: 860px) {
  .landing-page .platform-section.light-story-section,
  .landing-page .optimization-section,
  .landing-page .faculty-section {
    padding-top: clamp(24px, 3.2vh, 42px);
    padding-bottom: clamp(24px, 3.2vh, 42px);
  }

  .landing-page .platform-section.light-story-section .story-frame {
    min-height: clamp(470px, 54vh, 590px);
  }

  .landing-page .optimization-section .section-heading h2 {
    font-size: clamp(44px, 3.35vw, 58px);
  }

  .landing-page .optimization-section .section-heading p {
    font-size: 15px;
    line-height: 1.76;
  }

  .landing-page .teaching-material-display {
    height: clamp(470px, 55vh, 600px);
  }
}

/* 20260627: Claude-like warm canvas for the public homepage only. */
.landing-page {
  --oa-bg: #FAF9F5;
  --oa-surface: #fbf6e6;
  background: linear-gradient(180deg, #FAF9F5 0%, #FAF9F5 46%, #fbf6e6 100%) !important;
}

.landing-page .landing-main,
.landing-page .teaching-hero,
.landing-page .landing-section {
  background: transparent !important;
}

/* 20260627: replace the hero floating widgets with a Claude-like abstract drawing. */
.landing-page .landing-nav {
  background: rgba(250, 249, 245, 0.9);
  backdrop-filter: blur(14px);
}

.landing-page .teaching-hero {
  background: #FAF9F5 !important;
  background-image: none !important;
}

.landing-page .teaching-hero .stage-grid,
.landing-page .teaching-hero .scene-panel,
.landing-page .teaching-hero .receipt-frame,
.landing-page .teaching-hero .ipa-flow {
  display: none !important;
}

.landing-page .teaching-hero .hero-copy,
.landing-page .teaching-hero .hero-metrics {
  position: relative;
  z-index: 2;
}

.landing-page .teaching-hero .cinematic-stage {
  z-index: 1 !important;
  overflow: visible !important;
  border: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
  filter: none !important;
  perspective: none !important;
  transform: none !important;
  transform-style: flat !important;
  animation: none !important;
  pointer-events: none;
}

.landing-page .teaching-hero .stage-beams {
  position: absolute !important;
  inset: 0 !important;
  display: block !important;
  width: 100% !important;
  height: 100% !important;
  overflow: visible !important;
  opacity: 1 !important;
  mix-blend-mode: normal !important;
  perspective: none !important;
  transform: none !important;
  -webkit-mask-image: none !important;
  mask-image: none !important;
}

.landing-page .teaching-hero .stage-beams::before,
.landing-page .teaching-hero .stage-beams::after {
  content: "";
  position: absolute;
  display: block;
  box-sizing: border-box;
  pointer-events: none;
}

.landing-page .teaching-hero .stage-beams::before {
  left: 18%;
  top: 48%;
  width: 26px;
  height: 72px;
  border-radius: 999px;
  background: #11100d;
  transform: rotate(8deg);
}

.landing-page .teaching-hero .stage-beams::after {
  left: 36%;
  top: 60%;
  width: 250px;
  height: 210px;
  border: 17px solid #11100d;
  border-top-color: transparent;
  border-right-color: transparent;
  border-radius: 62% 38% 58% 42% / 46% 54% 48% 52%;
  transform: rotate(20deg);
}

.landing-page .teaching-hero .stage-beam {
  position: absolute !important;
  display: block !important;
  box-sizing: border-box !important;
  height: auto !important;
  border-radius: 999px !important;
  background: none !important;
  box-shadow: none !important;
  opacity: 1 !important;
  transform-origin: center !important;
  animation: none !important;
  will-change: auto !important;
}

.landing-page .teaching-hero .beam-primary {
  left: 44% !important;
  top: 15% !important;
  width: clamp(116px, 9vw, 154px) !important;
  height: clamp(116px, 9vw, 154px) !important;
  border: 0 !important;
  border-radius: 49% 51% 46% 54% / 52% 45% 55% 48% !important;
  background: #d97755 !important;
  transform: rotate(8deg) !important;
}

.landing-page .teaching-hero .beam-secondary {
  left: 18% !important;
  top: 35% !important;
  width: clamp(220px, 18vw, 292px) !important;
  height: clamp(150px, 13vw, 214px) !important;
  border: clamp(13px, 1.1vw, 18px) solid #11100d !important;
  border-top-color: transparent !important;
  border-right-color: transparent !important;
  border-radius: 58% 42% 64% 36% / 42% 56% 44% 58% !important;
  transform: rotate(-24deg) skewX(-8deg) !important;
}

.landing-page .teaching-hero .beam-tertiary {
  left: 44% !important;
  top: 34% !important;
  width: clamp(170px, 15vw, 236px) !important;
  height: clamp(250px, 22vw, 330px) !important;
  border: clamp(14px, 1.15vw, 19px) solid #11100d !important;
  border-top-color: transparent !important;
  border-left-color: transparent !important;
  border-radius: 46% 54% 44% 56% / 40% 58% 42% 60% !important;
  transform: rotate(7deg) !important;
}

.landing-page .teaching-hero .beam-quaternary {
  right: 3% !important;
  top: 13% !important;
  width: clamp(210px, 18vw, 300px) !important;
  height: clamp(380px, 36vw, 520px) !important;
  border: clamp(14px, 1.15vw, 19px) solid transparent !important;
  border-top-color: #11100d !important;
  border-right-color: #11100d !important;
  border-bottom-color: #11100d !important;
  border-radius: 54% 46% 48% 52% / 32% 48% 52% 68% !important;
  transform: rotate(12deg) !important;
}

.landing-page .teaching-hero .beam-faint {
  left: 52% !important;
  top: 31% !important;
  width: clamp(32px, 3vw, 44px) !important;
  height: clamp(116px, 10vw, 150px) !important;
  border: 0 !important;
  border-radius: 999px !important;
  background: #11100d !important;
  transform: rotate(4deg) !important;
}

@media (min-width: 1181px) {
  .landing-page .teaching-hero .cinematic-stage {
    inset: clamp(128px, 14vh, 176px) clamp(128px, 9vw, 204px) clamp(168px, 18vh, 224px) auto !important;
    width: min(680px, 40vw) !important;
    min-height: clamp(470px, 58vh, 650px) !important;
  }
}

@media (min-width: 761px) and (max-width: 1180px) {
  .landing-page .teaching-hero .cinematic-stage {
    inset: 132px clamp(32px, 5vw, 56px) auto auto !important;
    width: min(520px, 44vw) !important;
    height: 430px !important;
  }
}

@media (max-width: 760px) {
  .landing-page .landing-nav {
    background: rgba(250, 249, 245, 0.94);
  }

  .landing-page .teaching-hero .cinematic-stage {
    position: relative !important;
    inset: auto !important;
    order: 2;
    width: min(420px, 100%) !important;
    height: 280px !important;
    min-height: 280px !important;
    margin: 28px auto 0 !important;
  }

  .landing-page .teaching-hero .stage-beams {
    left: 50% !important;
    top: 0 !important;
    width: 520px !important;
    height: 430px !important;
    transform: translateX(-50%) scale(0.58) !important;
    transform-origin: top center !important;
  }
}

/* 20260627: pure black footer landing section. */
.landing-page .site-footer {
  color: #ffffff;
  background: #000000 !important;
}

.landing-page .site-footer::before {
  content: none !important;
  display: none !important;
  background: none !important;
}

.landing-page .footer-brand-block strong,
.landing-page .footer-link,
.landing-page .footer-bottom a,
.landing-page .footer-social-link {
  color: #ffffff !important;
}

.landing-page .footer-brand-block p,
.landing-page .footer-bottom,
.landing-page .footer-legal {
  color: rgba(255, 255, 255, 0.66) !important;
}

.landing-page .footer-legal {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  min-width: 0;
}

.landing-page .footer-column h2 {
  color: rgba(255, 255, 255, 0.48) !important;
}

.landing-page .footer-link:hover,
.landing-page .footer-link:focus-visible,
.landing-page .footer-social-link:hover,
.landing-page .footer-social-link:focus-visible {
  color: #ffffff !important;
  background: rgba(255, 255, 255, 0.12) !important;
}

.landing-page .footer-contact-popover,
.landing-page .footer-email-popover {
  color: #ffffff;
  background: #000000 !important;
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.landing-page .footer-contact-popover span,
.landing-page .footer-email-popover span {
  color: rgba(255, 255, 255, 0.58) !important;
}

.landing-page .footer-contact-popover strong,
.landing-page .footer-contact-popover a,
.landing-page .footer-email-popover a {
  color: #ffffff !important;
}

/* 20260627: theme-specific hero visual for accounting AI training. */
.landing-page .teaching-hero .stage-beams {
  display: none !important;
}

.landing-page .hero-domain-visual {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
}

.landing-page .hero-domain-graphic {
  display: block;
  width: min(100%, 620px);
  height: auto;
  overflow: visible;
}

.landing-page .domain-sheet {
  fill: #fffdfa;
  stroke: #11100d;
  stroke-width: 3;
}

.landing-page .domain-sheet-fold {
  fill: #f2eadb;
  stroke: #11100d;
  stroke-width: 3;
  stroke-linejoin: round;
}

.landing-page .domain-sheet-title {
  fill: #11100d;
}

.landing-page .domain-sheet-line {
  fill: rgba(17, 16, 13, 0.22);
}

.landing-page .domain-scan-corner,
.landing-page .domain-ledger path,
.landing-page .domain-flow-line,
.landing-page .domain-ai-chip path,
.landing-page .domain-score-check {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.landing-page .domain-scan-corner {
  stroke: #0f8f7b;
  stroke-width: 7;
}

.landing-page .domain-ledger rect {
  fill: rgba(15, 143, 123, 0.08);
  stroke: rgba(17, 16, 13, 0.22);
  stroke-width: 1.5;
}

.landing-page .domain-ledger path {
  stroke: rgba(17, 16, 13, 0.46);
  stroke-width: 5;
}

.landing-page .domain-flow-line {
  stroke: rgba(17, 16, 13, 0.88);
  stroke-width: 8;
}

.landing-page .domain-flow-line-secondary {
  stroke: #0f8f7b;
  stroke-width: 6;
}

.landing-page .domain-ai-chip rect {
  fill: #11100d;
  stroke: #11100d;
  stroke-width: 3;
}

.landing-page .domain-ai-chip path {
  stroke: #11100d;
  stroke-width: 5;
}

.landing-page .domain-ai-chip text {
  fill: #fffdfa;
  font: 800 42px var(--oa-font);
  letter-spacing: -0.02em;
}

.landing-page .domain-score-base {
  fill: #fffdfa;
  stroke: rgba(17, 16, 13, 0.16);
  stroke-width: 3;
}

.landing-page .domain-score-ring {
  fill: none;
  stroke: #d97755;
  stroke-width: 15;
  stroke-linecap: round;
}

.landing-page .domain-score-check {
  stroke: #0f8f7b;
  stroke-width: 12;
}

.landing-page .domain-score text {
  fill: #11100d;
  font: 850 34px var(--oa-font);
  letter-spacing: -0.03em;
}

.landing-page .domain-accent-dot {
  fill: #d97755;
}

.landing-page .domain-accent-dot-small {
  fill: #0f8f7b;
}

@media (max-width: 760px) {
  .landing-page .hero-domain-visual {
    place-items: start center;
  }

  .landing-page .hero-domain-graphic {
    width: min(330px, 100%);
  }
}

/* 20260627: orange accent pass for homepage chrome and Hero only. */
.landing-page {
  --landing-orange: #d97755;
  --landing-orange-strong: #b85d34;
  --landing-orange-deep: #8f3f20;
  --landing-orange-soft: rgba(217, 119, 85, 0.12);
  --landing-orange-line: rgba(217, 119, 85, 0.42);
}

.landing-page .hero-kicker {
  color: var(--landing-orange-deep) !important;
}

.landing-page .hero-primary {
  color: #fffdfa !important;
  background: var(--landing-orange) !important;
  border-color: var(--landing-orange) !important;
}

.landing-page .hero-primary:hover,
.landing-page .hero-primary:focus-visible {
  background: var(--landing-orange-strong) !important;
  border-color: var(--landing-orange-strong) !important;
}

.landing-page .hero-metrics {
  border-bottom-color: var(--landing-orange-line) !important;
}

.landing-page .hero-metrics::before,
.landing-page .hero-metrics::after {
  background: linear-gradient(90deg, rgba(217, 119, 85, 0), var(--landing-orange), rgba(217, 119, 85, 0.18)) !important;
}

.landing-page .domain-scan-corner,
.landing-page .domain-flow-line-secondary,
.landing-page .domain-score-check {
  stroke: var(--landing-orange) !important;
}

.landing-page .domain-ledger rect {
  fill: var(--landing-orange-soft) !important;
}

.landing-page .domain-accent-dot,
.landing-page .domain-accent-dot-small {
  fill: var(--landing-orange) !important;
}

.landing-page .domain-score-ring {
  stroke: var(--landing-orange) !important;
}

.landing-page .footer-contact-popover,
.landing-page .footer-email-popover {
  border-color: rgba(217, 119, 85, 0.28) !important;
}

/* 20260627: Claude-inspired Hero rebuild with abstract accounting gesture. */
.landing-page .hero-domain-visual,
.landing-page .hero-domain-graphic {
  display: none !important;
}

.landing-page .hero-abstract-visual {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
}

.landing-page .hero-abstract-graphic {
  display: block;
  width: min(100%, 590px);
  height: auto;
  overflow: visible;
}

.landing-page .abstract-thread {
  fill: none;
  stroke: #11100d;
  stroke-width: 17;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.landing-page .abstract-thread-soft {
  stroke-width: 10;
}

.landing-page .abstract-thread-knot {
  stroke-width: 18;
}

.landing-page .abstract-thread-bottom {
  stroke-width: 15;
}

.landing-page .abstract-orb,
.landing-page .abstract-dot,
.landing-page .abstract-dot-small {
  fill: var(--landing-orange);
}

.landing-page .abstract-voucher {
  fill: rgba(255, 253, 250, 0.74);
  stroke: rgba(17, 16, 13, 0.12);
  stroke-width: 1.5;
}

.landing-page .abstract-voucher-line,
.landing-page .abstract-voucher-mark {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.landing-page .abstract-voucher-line {
  stroke: rgba(17, 16, 13, 0.42);
  stroke-width: 6;
}

.landing-page .abstract-voucher-mark {
  stroke: var(--landing-orange);
  stroke-width: 8;
}

.landing-page .hero-ai-entry {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  width: min(520px, 100%);
  min-height: 56px;
  margin-top: 30px;
  padding: 6px 7px 6px 20px;
  border: 1px solid rgba(17, 16, 13, 0.1);
  border-radius: 8px;
  background: rgba(255, 253, 250, 0.76);
}

.landing-page .hero-ai-placeholder {
  min-width: 0;
  color: rgba(17, 16, 13, 0.56);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.landing-page .hero-ai-entry .hero-primary {
  min-height: 44px;
  padding: 0 20px;
}

.landing-page .hero-actions {
  margin-top: 12px !important;
}

.landing-page .hero-secondary {
  min-height: 32px;
  padding: 0 14px;
  color: rgba(17, 16, 13, 0.72) !important;
  border-color: rgba(17, 16, 13, 0.12) !important;
  background: rgba(255, 253, 250, 0.62) !important;
}

@media (min-width: 1181px) {
  .landing-page .teaching-hero .hero-copy {
    max-width: min(600px, 42vw) !important;
    padding-bottom: 0 !important;
    transform: translateY(clamp(-18px, -2vh, -8px)) !important;
  }

  .landing-page .teaching-hero .cinematic-stage {
    inset: clamp(138px, 16vh, 196px) clamp(120px, 8vw, 190px) clamp(190px, 20vh, 248px) auto !important;
    width: min(690px, 41vw) !important;
    min-height: clamp(500px, 55vh, 650px) !important;
  }
}

@media (min-width: 761px) and (max-width: 1180px) {
  .landing-page .hero-ai-entry {
    width: min(480px, 100%);
  }

  .landing-page .teaching-hero .cinematic-stage {
    height: 390px !important;
  }
}

@media (max-width: 760px) {
  .landing-page .hero-ai-entry {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 10px;
  }

  .landing-page .hero-ai-placeholder {
    padding: 0 8px;
    white-space: normal;
  }

  .landing-page .hero-ai-entry .hero-primary,
  .landing-page .hero-secondary {
    width: 100%;
  }

  .landing-page .teaching-hero .cinematic-stage {
    height: 260px !important;
  }

  .landing-page .hero-abstract-visual {
    place-items: start center;
  }

  .landing-page .hero-abstract-graphic {
    width: min(360px, 100%);
  }
}

/* 20260627: tighten Claude-style abstract Hero across narrower viewports. */
.landing-page .hero-abstract-visual {
  place-items: start end;
  box-sizing: border-box;
  padding-top: clamp(34px, 4.6vw, 58px);
}

.landing-page .hero-abstract-graphic {
  width: min(100%, clamp(440px, 30vw, 560px));
}

@media (min-width: 761px) and (max-width: 1180px) {
  .landing-page .hero-abstract-visual {
    padding-top: 18px;
  }

  .landing-page .hero-abstract-graphic {
    width: min(430px, 86%);
  }
}

@media (max-width: 760px) {
  .landing-page .hero-abstract-visual {
    place-items: start center;
    padding-top: 0;
  }

  .landing-page .hero-abstract-graphic {
    width: min(320px, 84vw);
  }
}

/* 20260627: remove pill rings from the teaching material switcher. */
.landing-page .teaching-material-tabs {
  gap: 22px;
  padding: 0 0 8px;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: inset 0 -1px 0 rgba(5, 18, 16, 0.16);
  backdrop-filter: none;
}

.landing-page .teaching-material-tabs button {
  min-height: 28px;
  padding: 0 0 8px;
  border: 0;
  border-radius: 0;
  color: rgba(5, 18, 16, 0.66);
  background: transparent;
  box-shadow: none;
  transform: none;
}

.landing-page .teaching-material-tabs button::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  border-radius: 0;
  background: transparent;
}

.landing-page .teaching-material-tabs button:hover,
.landing-page .teaching-material-tabs button:focus-visible,
.landing-page .teaching-material-tabs button.is-active {
  color: #001f1a;
  background: transparent;
  box-shadow: none;
  transform: none;
}

.landing-page .teaching-material-tabs button.is-active::after {
  background: currentColor;
}

.landing-page .teaching-material-tabs button:focus-visible {
  outline: 2px solid rgba(0, 31, 26, 0.24);
  outline-offset: 4px;
}

@media (max-width: 760px) {
  .landing-page .teaching-material-tabs {
    gap: 16px;
    justify-content: flex-start;
  }

  .landing-page .teaching-material-tabs button {
    flex: 0 0 auto;
    padding: 0 0 8px;
  }
}

/* 20260627: lighten the Hero canvas to match the following section. */
.landing-page .teaching-hero {
  background: #fffdf8 !important;
  background-image: none !important;
}

/* 20260627: make the student recap composer closer to a Codex-style input. */
.landing-page .student-chat-demo .demo-chat-input {
  position: relative;
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr) 36px;
  align-items: end;
  gap: 10px;
  min-height: 82px;
  padding: 14px 14px 12px;
  border: 1px solid rgba(17, 16, 13, 0.12);
  border-radius: 22px;
  background: #fffdfa;
  box-shadow: 0 2px 8px rgba(17, 16, 13, 0.06);
}

.landing-page .student-chat-demo .demo-chat-input:focus-within {
  border-color: rgba(17, 16, 13, 0.28);
  box-shadow: 0 0 0 3px rgba(17, 16, 13, 0.06);
}

.landing-page .student-chat-demo .demo-chat-input p {
  align-self: center;
  margin: 0;
  padding: 0 2px 2px;
  color: rgba(17, 16, 13, 0.78);
  font-size: 13px;
  font-weight: 560;
  line-height: 1.58;
}

.landing-page .student-chat-demo .demo-tool-button {
  align-self: end;
  width: 32px;
  height: 32px;
  border: 0;
  border-radius: 10px;
  color: rgba(17, 16, 13, 0.62);
  background: transparent;
  font-size: 20px;
  font-weight: 360;
}

.landing-page .student-chat-demo .demo-send-button {
  align-self: end;
  box-sizing: border-box;
  width: 34px;
  min-width: 34px;
  height: 34px;
  min-height: 34px;
  padding: 0;
  border-radius: 10px;
  background: #11100d;
  color: #fffdfa;
  font-size: 18px;
  line-height: 1;
  box-shadow: none;
}

.landing-page .student-chat-demo .demo-send-button:hover,
.landing-page .student-chat-demo .demo-send-button:focus-visible,
.landing-page .student-chat-demo.is-running .demo-send-button {
  background: #11100d;
  box-shadow: none;
}

/* 20260627: rebuild the problem / solution slide as a Claude-like product showcase. */
.landing-page .problem-solution-v2 {
  --problem-ink: #11100d;
  --problem-muted: rgba(17, 16, 13, 0.64);
  --problem-line: rgba(17, 16, 13, 0.14);
  --problem-paper: #fffdfa;
  --problem-stage: #c76f5d;
  --problem-stage-deep: #b85848;
  --problem-stage-soft: #dd8a68;
  --problem-accent: var(--landing-orange, #d97755);
  width: min(1500px, calc(100vw - 96px)) !important;
  grid-template-columns: 1fr !important;
  align-content: center !important;
  align-items: center !important;
  gap: clamp(26px, 4vh, 48px) !important;
  padding-top: clamp(46px, 6vh, 78px) !important;
  padding-bottom: clamp(52px, 6.5vh, 84px) !important;
  color: var(--problem-ink) !important;
  background: var(--oa-bg) !important;
}

.landing-page .problem-solution-v2::before {
  width: min(260px, 34vw);
  background: rgba(17, 16, 13, 0.14) !important;
}

.landing-page .problem-stage-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1120px) minmax(118px, 158px);
  gap: clamp(18px, 2.3vw, 32px);
  align-items: center;
  justify-content: center;
  width: min(1320px, 100%);
  margin: 0 auto;
}

.landing-page .problem-media-stage {
  position: relative;
  display: grid;
  grid-template-columns: minmax(420px, 1fr) minmax(270px, 330px);
  gap: clamp(28px, 3vw, 48px);
  align-items: center;
  min-height: clamp(410px, 44vh, 570px);
  margin: 0;
  padding: clamp(34px, 4vw, 58px);
  overflow: hidden;
  border-radius: 16px;
  background:
    linear-gradient(122deg, transparent 0 34%, rgba(255, 255, 255, 0.12) 34.5% 36%, transparent 36.5% 100%),
    linear-gradient(28deg, transparent 0 55%, rgba(255, 255, 255, 0.1) 55.5% 57%, transparent 57.5% 100%),
    linear-gradient(140deg, var(--problem-stage-soft) 0%, var(--problem-stage) 52%, var(--problem-stage-deep) 100%);
  isolation: isolate;
}

.landing-page .problem-media-stage::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    linear-gradient(100deg, transparent 0 18%, rgba(255, 255, 255, 0.08) 18.4% 19.4%, transparent 19.8% 100%),
    linear-gradient(252deg, transparent 0 28%, rgba(255, 255, 255, 0.08) 28.4% 29.5%, transparent 29.9% 100%);
  opacity: 0.72;
  pointer-events: none;
}

.landing-page .problem-report-window,
.landing-page .problem-tech-stack {
  position: relative;
  z-index: 1;
}

.landing-page .problem-report-window {
  align-self: center;
  min-width: 0;
  padding: clamp(22px, 2.4vw, 34px);
  border: 1px solid rgba(17, 16, 13, 0.1);
  border-radius: 14px;
  background: var(--problem-paper);
  box-shadow: 0 10px 14px rgba(64, 38, 28, 0.13);
}

.landing-page .problem-window-bar {
  display: flex;
  gap: 8px;
  margin-bottom: clamp(18px, 2vw, 28px);
}

.landing-page .problem-window-bar span {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: #ee6558;
}

.landing-page .problem-window-bar span:nth-child(2) {
  background: #e9bd44;
}

.landing-page .problem-window-bar span:nth-child(3) {
  background: #38b46b;
}

.landing-page .problem-window-label {
  display: inline-flex;
  margin-bottom: 8px;
  color: var(--problem-accent);
  font-size: 13px;
  font-weight: 820;
}

.landing-page .problem-report-window h3 {
  margin: 0 0 clamp(18px, 2.2vw, 28px);
  color: var(--problem-ink);
  font-size: clamp(24px, 2.4vw, 34px);
  line-height: 1.14;
  letter-spacing: -0.02em;
}

.landing-page .problem-metric-list {
  display: grid;
  gap: 14px;
}

.landing-page .problem-metric-row {
  display: grid;
  gap: 8px;
  margin: 0;
}

.landing-page .problem-metric-row div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}

.landing-page .problem-metric-row span {
  color: rgba(17, 16, 13, 0.72);
  font-size: 13px;
  font-weight: 720;
}

.landing-page .problem-metric-row strong {
  color: var(--problem-ink);
  font-size: clamp(20px, 2vw, 28px);
  font-weight: 860;
  letter-spacing: -0.02em;
}

.landing-page .problem-metric-row i {
  position: relative;
  display: block;
  height: 9px;
  overflow: hidden;
  border-radius: 999px;
  background: #ece3d8;
}

.landing-page .problem-metric-row i::before,
.landing-page .problem-metric-row i b {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  border-radius: inherit;
}

.landing-page .problem-metric-row i::before {
  width: var(--before-value);
  background: #d7c8bb;
}

.landing-page .problem-metric-row i b {
  width: var(--after-value);
  background: var(--problem-accent);
}

.landing-page .metric-accuracy {
  --before-value: 88.79%;
  --after-value: 92.32%;
}

.landing-page .metric-event {
  --before-value: 74.6%;
  --after-value: 89.3%;
}

.landing-page .metric-rouge {
  --before-value: 92.3%;
  --after-value: 89.4%;
}

.landing-page .metric-cost {
  --before-value: 100%;
  --after-value: 18%;
}

.landing-page .metric-cost i b {
  background: #11100d;
}

.landing-page .problem-metric-row p {
  margin: 0;
  color: rgba(17, 16, 13, 0.58);
  font-size: 12px;
  line-height: 1.45;
}

.landing-page .problem-tech-stack {
  display: grid;
  gap: 14px;
  align-content: center;
}

.landing-page .problem-dark-card {
  display: grid;
  gap: 14px;
  padding: clamp(18px, 2vw, 24px);
  border-radius: 12px;
  color: #fff8ee;
  background: #11100f;
}

.landing-page .problem-dark-card span {
  color: rgba(255, 248, 238, 0.72);
  font-size: 13px;
  font-weight: 760;
}

.landing-page .problem-dark-card code {
  display: block;
  color: rgba(255, 248, 238, 0.92);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.76;
}

.landing-page .problem-loop-card div {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.landing-page .problem-loop-card em {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 10px;
  border-radius: 999px;
  color: #11100f;
  background: #fff8ee;
  font-size: 12px;
  font-style: normal;
  font-weight: 820;
}

.landing-page .problem-loop-card p {
  margin: 0;
  color: rgba(255, 248, 238, 0.7);
  font-size: 13px;
  line-height: 1.62;
}

.landing-page .problem-side-note {
  display: grid;
  gap: 12px;
  align-content: center;
  color: rgba(17, 16, 13, 0.58);
}

.landing-page .problem-side-note span {
  position: relative;
  display: block;
  width: 54px;
  height: 46px;
  border-top: 1.5px solid rgba(17, 16, 13, 0.32);
  border-left: 1.5px solid rgba(17, 16, 13, 0.32);
  border-radius: 44px 0 0 0;
  transform: rotate(-24deg);
}

.landing-page .problem-side-note span::after {
  content: "";
  position: absolute;
  left: -5px;
  bottom: -2px;
  width: 9px;
  height: 9px;
  border-left: 1.5px solid rgba(17, 16, 13, 0.32);
  border-bottom: 1.5px solid rgba(17, 16, 13, 0.32);
  transform: rotate(-28deg);
}

.landing-page .problem-side-note p {
  max-width: 14ch;
  margin: 0;
  color: rgba(17, 16, 13, 0.62);
  font-size: 14px;
  line-height: 1.55;
}

.landing-page .problem-copy-row {
  display: grid;
  grid-template-columns: minmax(330px, 0.72fr) minmax(560px, 1fr);
  gap: clamp(34px, 5vw, 82px);
  align-items: start;
  width: min(1120px, 100%);
  margin: 0 auto;
}

.landing-page .problem-copy-row .problem-title-block {
  order: 0 !important;
  align-self: start !important;
  justify-self: start !important;
  max-width: none !important;
  padding-top: 0 !important;
}

.landing-page .problem-title-block .landing-label {
  margin-bottom: 14px !important;
  color: var(--landing-orange-deep, #8f3f20) !important;
}

.landing-page .problem-title-block h2 {
  max-width: 14ch !important;
  margin: 0 !important;
  color: var(--problem-ink) !important;
  font-size: clamp(34px, 3.1vw, 52px) !important;
  line-height: 1.08 !important;
  letter-spacing: -0.022em !important;
  text-wrap: balance;
}

.landing-page .problem-title-block h2 span {
  display: block;
  white-space: normal !important;
}

.landing-page .problem-copy-body {
  display: grid;
  gap: 14px;
}

.landing-page .problem-copy-body p {
  max-width: 66ch !important;
  margin: 0 !important;
  color: rgba(17, 16, 13, 0.66) !important;
  font-size: 15.5px !important;
  line-height: 1.86 !important;
  text-wrap: pretty;
}

.landing-page .landing-slide .problem-stage-wrap {
  opacity: 0;
  transform: translateY(36px);
  transition:
    opacity 700ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 800ms cubic-bezier(0.16, 1, 0.3, 1);
}

.landing-page .landing-slide.is-active .problem-stage-wrap,
.landing-page .landing-slide:target .problem-stage-wrap {
  opacity: 1;
  transform: none;
}

.landing-page .landing-slide.is-active .problem-stage-wrap {
  transition-delay: 120ms;
}

.landing-page.force-reduced-motion .landing-slide .problem-stage-wrap {
  opacity: 1;
  transform: none;
  transition: none;
}

@media (max-width: 1180px) {
  .landing-page .problem-solution-v2 {
    width: min(940px, calc(100vw - 44px)) !important;
    gap: 28px !important;
  }

  .landing-page .problem-stage-wrap,
  .landing-page .problem-copy-row {
    grid-template-columns: 1fr;
  }

  .landing-page .problem-stage-wrap {
    width: 100%;
  }

  .landing-page .problem-side-note {
    display: none;
  }

  .landing-page .problem-media-stage {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 28px;
  }

  .landing-page .problem-tech-stack {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .landing-page .problem-copy-row {
    width: 100%;
    gap: 18px;
  }

  .landing-page .problem-title-block h2 {
    max-width: 18ch !important;
  }
}

@media (max-width: 760px) {
  .landing-page .problem-solution-v2 {
    width: min(100%, calc(100vw - 28px)) !important;
    padding-top: 36px !important;
    padding-bottom: 48px !important;
  }

  .landing-page .problem-media-stage {
    gap: 18px;
    padding: 16px;
    border-radius: 12px;
  }

  .landing-page .problem-report-window {
    padding: 18px;
    border-radius: 12px;
  }

  .landing-page .problem-report-window h3 {
    font-size: 24px;
  }

  .landing-page .problem-tech-stack {
    grid-template-columns: 1fr;
  }

  .landing-page .problem-dark-card {
    padding: 18px;
  }

  .landing-page .problem-title-block h2 {
    max-width: 100% !important;
    font-size: clamp(30px, 9vw, 40px) !important;
  }

  .landing-page .problem-copy-body p {
    font-size: 14px !important;
    line-height: 1.78 !important;
  }

  .landing-page .problem-metric-row div {
    align-items: flex-start;
    flex-direction: column;
    gap: 3px;
  }
}

/* 20260627: use one continuous canvas and remove old slide divider rules. */
.landing-page {
  --oa-bg: #FAF9F5;
  background: #FAF9F5 !important;
}

.landing-page .landing-main,
.landing-page .landing-slide,
.landing-page .landing-section,
.landing-page .teaching-hero,
.landing-page .platform-section,
.landing-page .optimization-section,
.landing-page .faculty-section,
.landing-page .problem-solution-v2 {
  background-color: #FAF9F5 !important;
}

.landing-page .platform-section,
.landing-page .optimization-section,
.landing-page .faculty-section,
.landing-page .split-section {
  border-top-color: transparent !important;
}

.landing-page .platform-section::before,
.landing-page .platform-section.light-story-section::before,
.landing-page .optimization-section::before,
.landing-page .faculty-section::before {
  display: none !important;
  content: none !important;
}

/* 20260627: place the problem narrative before the showcase and tighten the fold. */
.landing-page .problem-solution-v2 {
  align-content: start !important;
  gap: clamp(18px, 2.4vh, 32px) !important;
  padding-top: clamp(112px, 12vh, 148px) !important;
  padding-bottom: clamp(52px, 6vh, 76px) !important;
}

.landing-page .problem-solution-v2::before {
  display: none !important;
  content: none !important;
}

.landing-page .problem-copy-row {
  order: -1;
  width: min(1120px, 100%);
  margin-bottom: 0;
}

.landing-page .problem-stage-wrap {
  order: 0;
}

.landing-page .problem-media-stage {
  min-height: clamp(360px, 38vh, 500px);
  padding: clamp(28px, 3.2vw, 48px);
}

.landing-page .problem-report-window {
  padding: clamp(20px, 2.1vw, 30px);
}

.landing-page .problem-report-window h3 {
  margin-bottom: clamp(16px, 1.7vw, 24px);
}

.landing-page .problem-metric-list {
  gap: 12px;
}

.landing-page .problem-copy-body p {
  line-height: 1.78 !important;
}

@media (max-width: 1180px) {
  .landing-page .problem-solution-v2 {
    padding-top: 96px !important;
  }
}

@media (max-width: 760px) {
  .landing-page .problem-solution-v2 {
    padding-top: 84px !important;
  }
}

/* 20260627: turn Hero metrics into an unframed proof strip. */
@media (min-width: 761px) {
  .landing-page .teaching-hero {
    --hero-metrics-height: 106px;
    --hero-metrics-bottom: clamp(48px, 5.8vh, 74px);
    --hero-copy-gap: clamp(82px, 10vh, 126px);
    padding-bottom: calc(var(--hero-metrics-height) + var(--hero-metrics-bottom) + var(--hero-copy-gap)) !important;
  }

  .landing-page .teaching-hero .hero-metrics {
    position: absolute !important;
    left: 50% !important;
    right: auto !important;
    bottom: var(--hero-metrics-bottom) !important;
    width: min(1500px, calc(100vw - 112px)) !important;
    min-height: var(--hero-metrics-height) !important;
    overflow: visible !important;
    border: 0 !important;
    border-radius: 0 !important;
    background: transparent !important;
    box-shadow: none !important;
    transform: translateX(-50%) !important;
  }

  .landing-page .teaching-hero .hero-metrics::before,
  .landing-page .teaching-hero .hero-metrics::after {
    display: none !important;
    content: none !important;
  }

  .landing-page .teaching-hero .impact-metric {
    align-content: start !important;
    min-height: var(--hero-metrics-height) !important;
    padding: 0 !important;
    border: 0 !important;
    background: transparent !important;
  }

  .landing-page .teaching-hero .impact-metric strong {
    color: #11100d !important;
    font-size: clamp(38px, 3vw, 52px) !important;
    line-height: 0.96 !important;
    font-weight: 860 !important;
    letter-spacing: -0.022em !important;
  }

  .landing-page .teaching-hero .impact-label {
    margin-top: 12px !important;
    color: #11100d !important;
    font-size: 17px !important;
    line-height: 1.2 !important;
    font-weight: 850 !important;
  }

  .landing-page .teaching-hero .impact-note {
    margin-top: 8px !important;
    color: rgba(17, 16, 13, 0.54) !important;
    font-size: 13px !important;
    line-height: 1.45 !important;
    font-weight: 560 !important;
  }
}

@media (min-width: 1181px) {
  .landing-page .teaching-hero .hero-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr)) !important;
    column-gap: clamp(56px, 5.6vw, 112px) !important;
  }
}

@media (min-width: 761px) and (max-width: 1180px) {
  .landing-page .teaching-hero .hero-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    width: min(760px, calc(100vw - 52px)) !important;
    row-gap: 24px !important;
  }

  .landing-page .teaching-hero {
    --hero-metrics-height: 226px;
    --hero-metrics-bottom: 42px;
    --hero-copy-gap: 76px;
  }
}

@media (max-width: 760px) {
  .landing-page .teaching-hero .hero-metrics {
    position: relative !important;
    left: auto !important;
    right: auto !important;
    bottom: auto !important;
    width: 100% !important;
    margin-top: 36px !important;
    border: 0 !important;
    border-radius: 0 !important;
    background: transparent !important;
    box-shadow: none !important;
    transform: none !important;
  }

  .landing-page .teaching-hero .hero-metrics::before,
  .landing-page .teaching-hero .hero-metrics::after {
    display: none !important;
    content: none !important;
  }

  .landing-page .teaching-hero .impact-metric {
    padding: 0 !important;
    border: 0 !important;
    background: transparent !important;
  }
}

/* 20260627: tighten the transition from Hero proof strip into the next slide. */
@media (min-width: 1181px) {
  .landing-page .teaching-hero {
    --hero-metrics-bottom: clamp(14px, 2.2vh, 30px);
    --hero-copy-gap: clamp(64px, 7.5vh, 96px);
  }

  .landing-page .platform-section.light-story-section {
    align-content: start !important;
    align-items: start !important;
    padding-top: clamp(82px, 9vh, 118px) !important;
  }
}

@media (min-width: 761px) and (max-width: 1180px) {
  .landing-page .teaching-hero {
    --hero-metrics-bottom: 22px;
    --hero-copy-gap: 58px;
  }

  .landing-page .platform-section.light-story-section {
    align-content: start !important;
    align-items: start !important;
    padding-top: 76px !important;
  }
}

/* 20260627: desktop breathing calibration for the 100% zoom presentation. */
@media (min-width: 1181px) {
  .landing-page .landing-nav {
    padding-inline: clamp(72px, 5.4vw, 112px) !important;
  }

  .landing-page .teaching-hero {
    padding-top: clamp(126px, 14vh, 174px) !important;
    --hero-metrics-bottom: clamp(28px, 3vh, 44px);
    --hero-copy-gap: clamp(76px, 8vh, 108px);
  }

  .landing-page .teaching-hero .hero-copy {
    max-width: min(580px, 42vw) !important;
    margin-left: clamp(96px, 10vw, 190px) !important;
  }

  .landing-page .hero-copy h1 {
    font-size: clamp(42px, 3.45vw, 60px) !important;
    line-height: 1.08 !important;
    letter-spacing: -0.018em !important;
  }

  .landing-page .hero-lede {
    max-width: 570px !important;
    font-size: clamp(18px, 1.15vw, 20px) !important;
    line-height: 1.78 !important;
  }

  .landing-page .hero-ai-entry {
    width: min(500px, 100%) !important;
    min-height: 52px !important;
    margin-top: 26px !important;
  }

  .landing-page .teaching-hero .cinematic-stage {
    inset: clamp(160px, 17vh, 210px) clamp(150px, 8.8vw, 220px) clamp(240px, 25vh, 310px) auto !important;
    width: min(640px, 38vw) !important;
  }

  .landing-page .hero-abstract-graphic {
    width: min(100%, 520px) !important;
  }

  .landing-page .teaching-hero .hero-metrics {
    width: min(1360px, calc(100vw - 190px)) !important;
  }

  .landing-page .teaching-hero .impact-metric strong {
    font-size: clamp(34px, 2.4vw, 46px) !important;
  }

  .landing-page .teaching-hero .impact-label {
    margin-top: 10px !important;
    font-size: 15.5px !important;
  }

  .landing-page .teaching-hero .impact-note {
    margin-top: 7px !important;
    font-size: 12.5px !important;
  }

  .landing-page .platform-section.light-story-section,
  .landing-page .problem-solution-v2,
  .landing-page .faculty-section {
    width: min(1500px, calc(100vw - 180px)) !important;
  }

  .landing-page .platform-section.light-story-section,
  .landing-page .faculty-section {
    gap: clamp(52px, 5.3vw, 96px) !important;
  }

  .landing-page .platform-section.light-story-section .section-heading h2,
  .landing-page .faculty-section > .slide-copy h2 {
    font-size: clamp(40px, 3.25vw, 56px) !important;
    line-height: 1.12 !important;
    letter-spacing: -0.018em !important;
  }

  .landing-page .problem-title-block h2 {
    max-width: 15ch !important;
    font-size: clamp(32px, 2.65vw, 46px) !important;
    line-height: 1.1 !important;
  }

  .landing-page .platform-section.light-story-section .section-heading p,
  .landing-page .faculty-section > .slide-copy p,
  .landing-page .problem-copy-body p {
    font-size: 15.5px !important;
    line-height: 1.76 !important;
  }

  .landing-page .platform-section.light-story-section .story-frame {
    min-height: clamp(540px, 56vh, 700px) !important;
  }

  .landing-page .problem-media-stage {
    min-height: clamp(340px, 34vh, 470px) !important;
    padding: clamp(24px, 2.6vw, 42px) !important;
  }

  .landing-page .faculty-section {
    grid-template-columns: minmax(390px, 0.5fr) minmax(650px, 0.95fr) !important;
  }

  .landing-page .teaching-material-stage {
    border: 0 !important;
    border-radius: 12px !important;
    background:
      radial-gradient(circle at 16% 18%, rgba(255, 255, 255, 0.68), transparent 30%),
      linear-gradient(135deg, #9bd8ff 0%, #bfd0fb 42%, #4651e7 100%) !important;
    box-shadow: none !important;
  }

  .landing-page .teaching-material-display {
    height: clamp(540px, 58vh, 700px) !important;
  }
}

@media (min-width: 1181px) and (max-height: 900px) {
  .landing-page .teaching-hero .hero-copy {
    margin-left: clamp(86px, 8vw, 154px) !important;
  }

  .landing-page .teaching-hero .cinematic-stage {
    width: min(560px, 35vw) !important;
  }

  .landing-page .platform-section.light-story-section,
  .landing-page .problem-solution-v2,
  .landing-page .faculty-section {
    width: min(1420px, calc(100vw - 160px)) !important;
  }
}

/* 20260627: pixel-align the teaching demo stage layers while keeping the gradient depth. */
.landing-page .teaching-material-stage {
  --teaching-stage-radius: 12px;
  position: relative !important;
  isolation: isolate !important;
  overflow: hidden !important;
  border: 0 !important;
  border-radius: var(--teaching-stage-radius) !important;
  background:
    radial-gradient(circle at 17% 18%, rgba(255, 255, 255, 0.72), rgba(255, 255, 255, 0.32) 18%, transparent 34%),
    radial-gradient(circle at 92% 20%, rgba(185, 218, 255, 0.48), transparent 32%),
    linear-gradient(135deg, #9bd8ff 0%, #b8d2ff 43%, #4651e7 100%) !important;
  background-clip: padding-box !important;
  box-shadow:
    0 20px 54px rgba(49, 74, 156, 0.12),
    0 0 0 1px rgba(97, 160, 255, 0.14) inset,
    0 1px 0 rgba(255, 255, 255, 0.34) inset !important;
}

.landing-page .teaching-material-stage::before {
  content: "" !important;
  position: absolute !important;
  inset: 0 !important;
  z-index: 0 !important;
  width: auto !important;
  min-height: 0 !important;
  padding: 0 !important;
  box-sizing: border-box !important;
  border: 0 !important;
  border-radius: inherit !important;
  clip-path: inset(0 round var(--teaching-stage-radius)) !important;
  color: transparent !important;
  font-size: 0 !important;
  line-height: 0 !important;
  white-space: normal !important;
  box-shadow: none !important;
  pointer-events: none !important;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.58) 0%, rgba(255, 255, 255, 0.52) 31.5%, rgba(255, 255, 255, 0.30) 33.2%, rgba(255, 255, 255, 0.22) 56.2%, rgba(255, 255, 255, 0.06) 58%, rgba(255, 255, 255, 0) 100%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.18), rgba(255, 255, 255, 0) 48%),
    radial-gradient(circle at 100% 100%, rgba(0, 0, 0, 0.08), transparent 34%) !important;
}

.landing-page .teaching-material-stage::after {
  content: "" !important;
  position: absolute !important;
  inset: 0 !important;
  z-index: 0 !important;
  width: auto !important;
  min-height: 0 !important;
  padding: 0 !important;
  box-sizing: border-box !important;
  border: 0 !important;
  border-radius: inherit !important;
  clip-path: inset(0 round var(--teaching-stage-radius)) !important;
  background: none !important;
  color: transparent !important;
  font-size: 0 !important;
  line-height: 0 !important;
  white-space: normal !important;
  pointer-events: none !important;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.36) inset,
    0 0 32px rgba(255, 255, 255, 0.10) inset !important;
}

.landing-page .teaching-material-stage > * {
  position: relative;
  z-index: 1;
}

/* 20260627: stronger desktop rhythm pass for 100% zoom viewing. */
@media (min-width: 1181px) {
  .landing-page {
    --desktop-page: min(1280px, calc(100vw - 240px));
    --desktop-wide: min(1360px, calc(100vw - 220px));
    --desktop-section-y: clamp(72px, 8.2vh, 104px);
    --desktop-section-gap: clamp(46px, 4.8vw, 76px);
    --desktop-h1: 52px;
    --desktop-h2: 46px;
    --desktop-body: 15px;
    --desktop-body-line: 1.74;
  }

  .landing-page .landing-nav {
    padding: 18px clamp(78px, 6vw, 124px) !important;
    background: rgba(250, 249, 245, 0.86) !important;
    backdrop-filter: blur(10px);
  }

  .landing-page .nexora-logo {
    width: 40px !important;
    height: 40px !important;
    border-radius: 9px !important;
  }

  .landing-page .landing-brand-text strong {
    font-size: 15px !important;
  }

  .landing-page .landing-brand-text em,
  .landing-page .landing-nav nav a {
    font-size: 12.5px !important;
  }

  .landing-page .teaching-hero {
    min-height: 100svh !important;
    padding-top: clamp(112px, 12vh, 140px) !important;
    padding-bottom: 182px !important;
    --hero-metrics-height: 96px;
    --hero-metrics-bottom: 28px;
    --hero-copy-gap: 50px;
  }

  .landing-page .teaching-hero .hero-copy {
    width: min(520px, 38vw) !important;
    max-width: 520px !important;
    margin-left: max(92px, calc((100vw - var(--desktop-page)) / 2)) !important;
    align-self: center !important;
    padding-bottom: 50px !important;
  }

  .landing-page .hero-kicker {
    margin-bottom: 14px !important;
    font-size: 13px !important;
  }

  .landing-page .hero-copy h1 {
    font-size: var(--desktop-h1) !important;
    line-height: 1.12 !important;
    letter-spacing: -0.012em !important;
    text-wrap: balance;
  }

  .landing-page .hero-lede {
    max-width: 500px !important;
    margin-top: 22px !important;
    font-size: 16.5px !important;
    line-height: 1.76 !important;
  }

  .landing-page .hero-ai-entry {
    width: min(460px, 100%) !important;
    min-height: 48px !important;
    margin-top: 24px !important;
  }

  .landing-page .hero-ai-placeholder,
  .landing-page .hero-primary,
  .landing-page .hero-secondary {
    font-size: 14px !important;
  }

  .landing-page .hero-primary {
    min-height: 40px !important;
    padding-inline: 22px !important;
  }

  .landing-page .hero-secondary {
    min-height: 36px !important;
    padding-inline: 18px !important;
  }

  .landing-page .teaching-hero .cinematic-stage {
    inset: clamp(132px, 14vh, 166px) max(94px, calc((100vw - var(--desktop-page)) / 2)) 178px auto !important;
    width: min(520px, 33vw) !important;
  }

  .landing-page .hero-abstract-graphic {
    width: min(100%, 470px) !important;
  }

  .landing-page .teaching-hero .hero-metrics {
    left: 50% !important;
    right: auto !important;
    bottom: var(--hero-metrics-bottom) !important;
    width: var(--desktop-wide) !important;
    min-height: var(--hero-metrics-height) !important;
    transform: translateX(-50%) !important;
  }

  .landing-page .teaching-hero .impact-metric {
    min-height: var(--hero-metrics-height) !important;
    padding-block: 10px !important;
  }

  .landing-page .teaching-hero .impact-metric strong {
    font-size: 40px !important;
    line-height: 1 !important;
  }

  .landing-page .teaching-hero .impact-label {
    margin-top: 8px !important;
    font-size: 14px !important;
  }

  .landing-page .teaching-hero .impact-note {
    margin-top: 6px !important;
    font-size: 12px !important;
  }

  .landing-page .platform-section.light-story-section,
  .landing-page .problem-solution-v2,
  .landing-page .faculty-section {
    width: var(--desktop-page) !important;
    min-height: 100svh !important;
    box-sizing: border-box !important;
    padding-top: var(--desktop-section-y) !important;
    padding-bottom: var(--desktop-section-y) !important;
    align-content: center !important;
    align-items: center !important;
  }

  .landing-page .platform-section.light-story-section {
    grid-template-columns: minmax(360px, 0.48fr) minmax(600px, 0.82fr) !important;
    gap: var(--desktop-section-gap) !important;
  }

  .landing-page .faculty-section {
    grid-template-columns: minmax(350px, 0.44fr) minmax(660px, 0.86fr) !important;
    gap: var(--desktop-section-gap) !important;
  }

  .landing-page .platform-section.light-story-section .section-heading h2,
  .landing-page .faculty-section > .slide-copy h2 {
    max-width: 13.5ch !important;
    font-size: var(--desktop-h2) !important;
    line-height: 1.14 !important;
    letter-spacing: -0.012em !important;
  }

  .landing-page .platform-section.light-story-section .section-heading p,
  .landing-page .faculty-section > .slide-copy p,
  .landing-page .problem-copy-body p {
    max-width: 60ch !important;
    font-size: var(--desktop-body) !important;
    line-height: var(--desktop-body-line) !important;
  }

  .landing-page .platform-section.light-story-section .section-heading p + p {
    margin-top: 12px !important;
  }

  .landing-page .openai-style-showcase {
    gap: 22px !important;
  }

  .landing-page .platform-map.showcase-tabs {
    gap: 16px !important;
  }

  .landing-page .platform-map.showcase-tabs button {
    min-height: 112px !important;
    padding: 18px 20px !important;
  }

  .landing-page .platform-map.showcase-tabs button strong {
    font-size: 17px !important;
    line-height: 1.32 !important;
  }

  .landing-page .platform-map.showcase-tabs button p {
    font-size: 13.5px !important;
    line-height: 1.62 !important;
  }

  .landing-page .platform-section.light-story-section .story-frame {
    min-height: clamp(450px, 48vh, 560px) !important;
    border-radius: 10px !important;
  }

  .landing-page .student-workbench-shot {
    transform: scale(0.92) translateY(-2%) !important;
  }

  .landing-page .student-ledger-card {
    transform: scale(0.9) translate(2%, 2%) !important;
    transform-origin: bottom right !important;
  }

  .landing-page .student-review-bubble {
    transform: scale(0.9) translate(0, 4%) !important;
    transform-origin: bottom left !important;
  }

  .landing-page .problem-solution-v2 {
    width: min(1180px, calc(100vw - 260px)) !important;
    gap: clamp(28px, 3.2vh, 42px) !important;
  }

  .landing-page .problem-copy-row {
    width: min(1040px, 100%) !important;
    grid-template-columns: minmax(300px, 0.58fr) minmax(520px, 1fr) !important;
    gap: clamp(44px, 5.4vw, 78px) !important;
  }

  .landing-page .problem-title-block .landing-label {
    margin-bottom: 12px !important;
    font-size: 12.5px !important;
  }

  .landing-page .problem-title-block h2 {
    max-width: 15ch !important;
    font-size: 42px !important;
    line-height: 1.12 !important;
    letter-spacing: -0.012em !important;
  }

  .landing-page .problem-stage-wrap {
    width: min(1120px, 100%) !important;
    grid-template-columns: minmax(0, 1fr) 132px !important;
    gap: 28px !important;
  }

  .landing-page .problem-media-stage {
    min-height: clamp(330px, 36vh, 430px) !important;
    grid-template-columns: minmax(390px, 1fr) minmax(240px, 300px) !important;
    gap: clamp(24px, 3vw, 38px) !important;
    padding: clamp(24px, 3vw, 40px) !important;
    border-radius: 12px !important;
  }

  .landing-page .problem-report-window {
    padding: clamp(18px, 2vw, 26px) !important;
    border-radius: 12px !important;
    box-shadow: 0 8px 12px rgba(64, 38, 28, 0.11) !important;
  }

  .landing-page .problem-report-window h3 {
    margin-bottom: 18px !important;
    font-size: 26px !important;
    line-height: 1.18 !important;
  }

  .landing-page .problem-metric-list {
    gap: 10px !important;
  }

  .landing-page .problem-metric-row {
    gap: 7px !important;
  }

  .landing-page .problem-metric-row span {
    font-size: 12.5px !important;
  }

  .landing-page .problem-metric-row strong {
    font-size: 24px !important;
  }

  .landing-page .problem-dark-card {
    padding: 18px 20px !important;
    border-radius: 10px !important;
  }

  .landing-page .problem-dark-card code,
  .landing-page .problem-dark-card p {
    font-size: 12.5px !important;
    line-height: 1.62 !important;
  }

  .landing-page .problem-side-note p {
    font-size: 13px !important;
  }

  .landing-page .faculty-section > .slide-copy {
    gap: 20px !important;
  }

  .landing-page .faculty-section > .slide-copy .teaching-live-copy {
    margin-top: 46px !important;
    padding-top: 28px !important;
  }

  .landing-page .faculty-section > .slide-copy .teaching-live-title {
    font-size: 31px !important;
    line-height: 1.14 !important;
  }

  .landing-page .faculty-section > .slide-copy .teaching-live-text {
    max-width: 52ch !important;
    font-size: 14.5px !important;
    line-height: 1.72 !important;
  }

  .landing-page .teaching-loop {
    width: 100% !important;
  }

  .landing-page .teaching-material-stage {
    min-height: 0 !important;
    padding: clamp(28px, 3vw, 44px) !important;
    border-radius: 12px !important;
  }

  .landing-page .teaching-material-display {
    height: clamp(430px, 48vh, 560px) !important;
    min-height: 0 !important;
  }

  .landing-page .teaching-material-tabs {
    margin-bottom: 24px !important;
  }

  .landing-page .teaching-demo-pane {
    padding: 0 !important;
  }

  .landing-page .demo-chat-scroll,
  .landing-page .teacher-review-lens {
    transform: scale(0.92) !important;
    transform-origin: center center !important;
  }

  .landing-page .landing-slide .slide-copy,
  .landing-page .landing-slide .platform-interactive,
  .landing-page .landing-slide .optimization-lab,
  .landing-page .landing-slide .teaching-loop,
  .landing-page .landing-slide .effect-comparison,
  .landing-page .landing-slide .problem-stage-wrap {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

@media (min-width: 1181px) and (max-height: 900px) {
  .landing-page {
    --desktop-page: min(1240px, calc(100vw - 220px));
    --desktop-wide: min(1300px, calc(100vw - 210px));
    --desktop-section-y: clamp(56px, 6.4vh, 78px);
    --desktop-section-gap: clamp(38px, 4.2vw, 64px);
    --desktop-h1: 48px;
    --desktop-h2: 42px;
  }

  .landing-page .teaching-hero {
    padding-top: 106px !important;
    padding-bottom: 156px !important;
    --hero-metrics-height: 90px;
    --hero-metrics-bottom: 22px;
  }

  .landing-page .teaching-hero .hero-copy {
    width: min(500px, 38vw) !important;
    padding-bottom: 34px !important;
  }

  .landing-page .hero-lede {
    font-size: 15.5px !important;
    line-height: 1.72 !important;
  }

  .landing-page .teaching-hero .cinematic-stage {
    width: min(480px, 31vw) !important;
    bottom: 152px !important;
  }

  .landing-page .teaching-hero .impact-metric strong {
    font-size: 36px !important;
  }

  .landing-page .platform-section.light-story-section .story-frame {
    min-height: clamp(390px, 45vh, 500px) !important;
  }

  .landing-page .problem-media-stage {
    min-height: clamp(300px, 35vh, 390px) !important;
  }

  .landing-page .teaching-material-display {
    height: clamp(390px, 46vh, 500px) !important;
  }
}

@media (min-width: 1181px) and (max-width: 1500px) {
  .landing-page {
    --desktop-page: min(1160px, calc(100vw - 132px));
    --desktop-wide: min(1220px, calc(100vw - 120px));
  }

  .landing-page .teaching-hero .hero-copy {
    margin-left: max(66px, calc((100vw - var(--desktop-page)) / 2)) !important;
  }

  .landing-page .teaching-hero .cinematic-stage {
    right: max(56px, calc((100vw - var(--desktop-page)) / 2)) !important;
  }

  .landing-page .platform-section.light-story-section,
  .landing-page .faculty-section {
    grid-template-columns: minmax(330px, 0.46fr) minmax(560px, 0.82fr) !important;
  }
}

/* 20260627: normalize section starts so the scroll rhythm does not jump between pages. */
@media (min-width: 1181px) {
  .landing-page .platform-section.light-story-section,
  .landing-page .faculty-section {
    align-content: start !important;
    padding-top: clamp(132px, 13.8vh, 156px) !important;
    padding-bottom: clamp(78px, 8vh, 104px) !important;
  }

  .landing-page .problem-solution-v2 {
    align-content: center !important;
    gap: clamp(22px, 2.8vh, 34px) !important;
  }

  .landing-page .problem-copy-row {
    width: min(1000px, 100%) !important;
    grid-template-columns: minmax(286px, 0.55fr) minmax(500px, 1fr) !important;
    gap: clamp(40px, 5vw, 70px) !important;
  }

  .landing-page .problem-title-block h2 {
    max-width: 15.5ch !important;
    font-size: 38px !important;
    line-height: 1.13 !important;
  }

  .landing-page .problem-copy-body {
    gap: 11px !important;
  }

  .landing-page .problem-copy-body p {
    font-size: 14.2px !important;
    line-height: 1.66 !important;
  }

  .landing-page .problem-stage-wrap {
    width: min(1080px, 100%) !important;
    grid-template-columns: minmax(0, 1fr) 118px !important;
    gap: 22px !important;
  }

  .landing-page .problem-media-stage {
    min-height: 0 !important;
    grid-template-columns: minmax(350px, 1fr) minmax(220px, 270px) !important;
    gap: clamp(18px, 2.4vw, 30px) !important;
    padding: clamp(18px, 2.4vw, 30px) !important;
  }

  .landing-page .problem-report-window {
    padding: 18px 22px !important;
  }

  .landing-page .problem-window-bar {
    margin-bottom: 13px !important;
  }

  .landing-page .problem-window-label {
    margin-bottom: 6px !important;
    font-size: 12px !important;
  }

  .landing-page .problem-report-window h3 {
    margin-bottom: 14px !important;
    font-size: 22px !important;
  }

  .landing-page .problem-metric-list {
    gap: 8px !important;
  }

  .landing-page .problem-metric-row {
    gap: 5px !important;
  }

  .landing-page .problem-metric-row div {
    gap: 12px !important;
  }

  .landing-page .problem-metric-row span {
    font-size: 11.5px !important;
  }

  .landing-page .problem-metric-row strong {
    font-size: 20px !important;
  }

  .landing-page .problem-metric-row i {
    height: 7px !important;
  }

  .landing-page .problem-metric-row p {
    font-size: 11.2px !important;
    line-height: 1.45 !important;
  }

  .landing-page .problem-tech-stack {
    gap: 11px !important;
  }

  .landing-page .problem-dark-card {
    padding: 14px 16px !important;
  }

  .landing-page .problem-dark-card span {
    margin-bottom: 8px !important;
    font-size: 12px !important;
  }

  .landing-page .problem-dark-card code,
  .landing-page .problem-dark-card p {
    font-size: 11.5px !important;
    line-height: 1.5 !important;
  }

  .landing-page .problem-loop-card div {
    gap: 7px !important;
    margin: 8px 0 10px !important;
  }

  .landing-page .problem-loop-card em {
    min-height: 26px !important;
    padding-inline: 10px !important;
    font-size: 11px !important;
  }
}

@media (min-width: 1181px) and (max-height: 900px) {
  .landing-page .platform-section.light-story-section,
  .landing-page .faculty-section {
    padding-top: clamp(110px, 12vh, 128px) !important;
    padding-bottom: clamp(56px, 6vh, 78px) !important;
  }

  .landing-page .problem-title-block h2 {
    font-size: 36px !important;
  }

  .landing-page .problem-copy-body p {
    line-height: 1.58 !important;
  }
}

/* 20260627: enlarge the platform art field while the student UI cards sit lighter inside it. */
@media (min-width: 1181px) {
  .landing-page .platform-section.light-story-section .story-frame {
    min-height: clamp(430px, 48vh, 540px) !important;
  }

  .landing-page #platform-background .story-paint {
    inset: -7% !important;
    transform: scale(1.12) !important;
    transform-origin: center center !important;
  }

  .landing-page #platform-background .paint-cyan {
    inset: -18% 43% -26% -20% !important;
    opacity: 0.92 !important;
    filter: blur(14px) !important;
  }

  .landing-page #platform-background .paint-lime {
    width: 64% !important;
    height: 84% !important;
    right: -18% !important;
    top: -10% !important;
    opacity: 0.9 !important;
    filter: blur(16px) !important;
  }

  .landing-page #platform-background .paint-blue {
    width: 74% !important;
    height: 48% !important;
    right: -2% !important;
    bottom: -17% !important;
    opacity: 0.82 !important;
    filter: blur(16px) !important;
  }

  .landing-page .student-workbench-shot {
    left: 10% !important;
    top: 12% !important;
    width: min(610px, 58%) !important;
    height: min(380px, 62%) !important;
    border-radius: 12px !important;
    box-shadow: 0 14px 30px rgba(17, 24, 22, 0.09) !important;
    transform: scale(0.88) translateY(-1%) !important;
    transform-origin: center center !important;
  }

  .landing-page .student-ledger-card {
    right: 7% !important;
    bottom: 12% !important;
    width: min(340px, 42%) !important;
    padding: 14px !important;
    border-radius: 12px !important;
    box-shadow: 0 12px 26px rgba(17, 24, 22, 0.09) !important;
    transform: scale(0.88) translate(2%, 2%) !important;
    transform-origin: bottom right !important;
  }

  .landing-page .student-review-bubble {
    left: 13% !important;
    bottom: 11% !important;
    width: min(280px, 34%) !important;
    padding: 13px 15px !important;
    border-radius: 12px !important;
    box-shadow: 0 12px 26px rgba(17, 24, 22, 0.08) !important;
    transform: scale(0.88) translate(0, 4%) !important;
    transform-origin: bottom left !important;
  }

  .landing-page .student-card-head {
    margin-bottom: 8px !important;
  }

  .landing-page .student-card-head span,
  .landing-page .student-review-bubble span {
    font-size: 11px !important;
  }

  .landing-page .student-card-head strong,
  .landing-page .student-ledger-card dl strong {
    font-size: 12px !important;
  }

  .landing-page .student-ledger-card p {
    margin-bottom: 9px !important;
    font-size: 12px !important;
    line-height: 1.45 !important;
  }

  .landing-page .student-ledger-card dl div {
    grid-template-columns: 24px minmax(0, 1fr) auto !important;
    gap: 8px !important;
    min-height: 30px !important;
    font-size: 12px !important;
  }

  .landing-page .student-review-bubble p {
    font-size: 12.5px !important;
    line-height: 1.5 !important;
  }
}

@media (max-width: 1180px) and (min-width: 761px) {
  .landing-page #platform-background .story-paint {
    inset: -6% !important;
    transform: scale(1.08) !important;
    transform-origin: center center !important;
  }

  .landing-page .student-workbench-shot {
    width: 60% !important;
    height: 52% !important;
    transform: scale(0.9) !important;
    transform-origin: center center !important;
  }

  .landing-page .student-ledger-card,
  .landing-page .student-review-bubble {
    transform: scale(0.86) !important;
  }
}

/* 20260627: compact the teacher review lens into a stable product-style scoring panel. */
.landing-page .teacher-review-window {
  display: grid !important;
  grid-template-rows: minmax(0, 1fr) auto !important;
  gap: 12px !important;
  width: min(650px, 94%) !important;
  height: auto !important;
  min-height: 0 !important;
  max-height: none !important;
  padding: 42px 18px 16px !important;
  border: 1px solid rgba(255, 255, 255, 0.72) !important;
  border-radius: 13px !important;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.97), rgba(246, 249, 252, 0.94)) !important;
  box-shadow: 0 18px 42px rgba(16, 43, 92, 0.14) !important;
}

.landing-page .teacher-review-window::after {
  height: 36px !important;
  padding-inline: 18px !important;
  font-size: 11px !important;
  background: rgba(255, 255, 255, 0.76) !important;
}

.landing-page .teacher-review-workspace {
  position: relative !important;
  inset: auto !important;
  display: grid !important;
  grid-template-columns: minmax(116px, 0.34fr) minmax(0, 1fr) !important;
  grid-template-rows: auto auto auto !important;
  gap: 9px !important;
  min-height: 0 !important;
  overflow: visible !important;
  padding: 10px !important;
  border: 1px solid rgba(5, 18, 16, 0.06) !important;
  border-radius: 11px !important;
  background:
    linear-gradient(135deg, rgba(247, 252, 251, 0.98), rgba(242, 247, 252, 0.94)) !important;
}

.landing-page .teacher-review-workspace::before {
  background:
    linear-gradient(90deg, rgba(0, 131, 112, 0.04), transparent 36%, rgba(100, 118, 245, 0.04)) !important;
}

.landing-page .teacher-review-score-focus,
.landing-page .teacher-review-dimension-focus,
.landing-page .teacher-review-detail-stack,
.landing-page .teacher-review-note {
  border-radius: 9px !important;
}

.landing-page .teacher-review-score-focus {
  grid-column: 1 !important;
  grid-row: 1 !important;
  padding: 13px 14px !important;
  align-content: center !important;
}

.landing-page .teacher-review-score-focus span,
.landing-page .teacher-focus-heading span,
.landing-page .teacher-review-note span {
  font-size: 11px !important;
}

.landing-page .teacher-review-score-focus strong {
  margin-top: 4px !important;
  font-size: clamp(42px, 4.2vw, 58px) !important;
  letter-spacing: -0.035em !important;
}

.landing-page .teacher-review-score-focus p {
  margin-top: 7px !important;
  font-size: 11.5px !important;
  line-height: 1.42 !important;
}

.landing-page .teacher-review-detail-stack {
  grid-column: 2 !important;
  grid-row: 1 !important;
  gap: 5px !important;
  padding: 9px !important;
}

.landing-page .teacher-review-row {
  grid-template-columns: minmax(54px, 72px) minmax(76px, 1fr) auto !important;
  gap: 9px !important;
  min-height: 28px !important;
  padding: 5px 8px !important;
}

.landing-page .teacher-review-row span,
.landing-page .teacher-review-row b {
  font-size: 11.5px !important;
}

.landing-page .teacher-review-row i {
  height: 7px !important;
}

.landing-page .teacher-review-dimension-focus {
  grid-column: 1 / -1 !important;
  grid-row: 2 !important;
  grid-template-columns: minmax(132px, auto) minmax(0, 1fr) auto !important;
  align-items: center !important;
  column-gap: 12px !important;
  row-gap: 6px !important;
  padding: 11px 12px !important;
}

.landing-page .teacher-review-dimension-focus .teacher-focus-heading {
  display: grid !important;
  gap: 3px !important;
}

.landing-page .teacher-review-dimension-focus .teacher-focus-heading strong {
  font-size: 15px !important;
}

.landing-page .teacher-review-dimension-focus .teacher-focus-meter {
  margin: 0 !important;
}

.landing-page .teacher-review-dimension-focus p {
  grid-column: 1 / -1 !important;
  margin: 0 !important;
  font-size: 11.8px !important;
  line-height: 1.42 !important;
}

.landing-page .teacher-review-note {
  grid-column: 1 / -1 !important;
  grid-row: 3 !important;
  grid-template-columns: minmax(116px, auto) minmax(0, 1fr) !important;
  align-items: center !important;
  gap: 10px !important;
  padding: 10px 12px !important;
}

.landing-page .teacher-review-note label {
  display: grid !important;
  gap: 3px !important;
}

.landing-page .teacher-review-note textarea {
  min-height: 42px !important;
  padding: 8px 10px !important;
  font-size: 11.8px !important;
  line-height: 1.4 !important;
}

.landing-page .teacher-review-note [data-review-comment-status] {
  grid-column: 1 / -1 !important;
  font-size: 10.8px !important;
}

.landing-page .teacher-review-hotspots {
  position: static !important;
  z-index: 4 !important;
  grid-template-columns: repeat(4, minmax(0, 1fr)) !important;
  gap: 8px !important;
}

.landing-page .teacher-review-hotspots button {
  min-height: 40px !important;
  padding: 8px 10px !important;
  border-radius: 9px !important;
  background: rgba(255, 255, 255, 0.86) !important;
}

.landing-page .teacher-review-hotspots span {
  font-size: 11.5px !important;
}

.landing-page .teacher-review-hotspots b {
  margin-top: 2px !important;
  font-size: 10.8px !important;
}

@media (min-width: 1181px) {
  .landing-page .teacher-review-lens {
    transform: scale(0.94) !important;
    transform-origin: center center !important;
  }
}

@media (max-width: 760px) {
  .landing-page .teacher-review-window {
    width: 100% !important;
    padding: 42px 14px 14px !important;
  }

  .landing-page .teacher-review-workspace {
    grid-template-columns: 1fr !important;
  }

  .landing-page .teacher-review-score-focus,
  .landing-page .teacher-review-detail-stack,
  .landing-page .teacher-review-dimension-focus,
  .landing-page .teacher-review-note {
    grid-column: 1 !important;
    grid-row: auto !important;
  }

  .landing-page .teacher-review-note {
    grid-template-columns: 1fr !important;
  }

  .landing-page .teacher-review-hotspots {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
  }
}

/* 20260627: rebuild problem / solution as a Claude-inspired artifact pager. */
.landing-page .problem-artifact-section.problem-solution-v2 {
  --artifact-ink: #15120f;
  --artifact-muted: rgba(21, 18, 15, 0.66);
  --artifact-soft: rgba(21, 18, 15, 0.1);
  --artifact-paper: #fffdf8;
  --artifact-canvas: #d97656;
  --artifact-canvas-deep: #bd604f;
  --artifact-canvas-soft: #df8a6c;
  --artifact-accent: #d76f4d;
  width: min(1280px, calc(100vw - 128px)) !important;
  display: grid !important;
  grid-template-columns: 1fr !important;
  align-content: start !important;
  gap: clamp(28px, 4vh, 48px) !important;
  padding-top: clamp(86px, 10vh, 122px) !important;
  padding-bottom: clamp(92px, 10vh, 132px) !important;
  background: #FAF9F5 !important;
  color: var(--artifact-ink) !important;
}

.landing-page .problem-artifact-header,
.landing-page .problem-artifact-shell {
  width: min(1120px, 100%);
  margin: 0 auto;
}

.landing-page .problem-artifact-header {
  display: grid;
  grid-template-columns: minmax(300px, 0.56fr) minmax(480px, 1fr);
  gap: clamp(42px, 6vw, 86px);
  align-items: start;
}

.landing-page .problem-artifact-title .landing-label {
  margin-bottom: 12px !important;
  color: #9f4728 !important;
}

.landing-page .problem-artifact-title h2 {
  max-width: 14ch;
  margin: 0;
  color: var(--artifact-ink);
  font-size: 42px;
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: 0;
  text-wrap: balance;
}

.landing-page .problem-artifact-intro {
  display: grid;
  gap: 12px;
  max-width: 66ch;
}

.landing-page .problem-artifact-intro p {
  margin: 0;
  color: var(--artifact-muted);
  font-size: 14.5px;
  line-height: 1.72;
  text-wrap: pretty;
}

.landing-page .problem-artifact-shell {
  display: grid;
  gap: 22px;
}

.landing-page .problem-artifact-tabs {
  display: inline-flex;
  width: max-content;
  max-width: 100%;
  gap: 4px;
  padding: 5px;
  border: 1px solid rgba(21, 18, 15, 0.07);
  border-radius: 14px;
  background: #f0eee8;
}

.landing-page .problem-artifact-tabs button {
  min-height: 42px;
  padding: 0 18px;
  border: 0;
  border-radius: 10px;
  color: rgba(21, 18, 15, 0.68);
  background: transparent;
  font-size: 14px;
  font-weight: 750;
  line-height: 1;
  cursor: pointer;
  transition: color 180ms ease, background 180ms ease, transform 180ms ease;
}

.landing-page .problem-artifact-tabs button:hover,
.landing-page .problem-artifact-tabs button:focus-visible {
  color: var(--artifact-ink);
  background: rgba(255, 253, 248, 0.72);
}

.landing-page .problem-artifact-tabs button:focus-visible {
  outline: 2px solid rgba(215, 111, 77, 0.28);
  outline-offset: 2px;
}

.landing-page .problem-artifact-tabs button.is-selected {
  color: var(--artifact-ink);
  background: var(--artifact-paper);
}

.landing-page .problem-artifact-canvas {
  position: relative;
  min-height: clamp(520px, 58vh, 680px);
  overflow: hidden;
  border-radius: 16px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.08), transparent 36%),
    linear-gradient(122deg, var(--artifact-canvas-soft) 0%, var(--artifact-canvas) 52%, var(--artifact-canvas-deep) 100%);
  isolation: isolate;
}

.landing-page .problem-artifact-canvas::before {
  content: "";
  position: absolute;
  inset: -10%;
  z-index: 0;
  opacity: 0.32;
  background-image: url("data:image/svg+xml,%3Csvg width='1240' height='760' viewBox='0 0 1240 760' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' stroke='%23f6b199' stroke-width='11' stroke-linecap='round' opacity='.7'%3E%3Cpath d='M-40 180C92 236 120 90 226 126c90 31 42 156 168 170 138 15 132-156 280-128 122 23 100 158 216 172 116 14 154-86 250-52 80 28 38 126 150 122'/%3E%3Cpath d='M-70 480c112 66 188-44 286 8 102 54 46 164 174 176 118 11 142-84 262-54 116 28 92 150 218 156 108 5 134-84 248-56'/%3E%3Cpath d='M520-60c66 110-34 172 42 260 86 100 204 30 266 150 62 120-50 172 16 284'/%3E%3C/g%3E%3C/svg%3E");
  background-position: center;
  background-size: cover;
  pointer-events: none;
}

.landing-page .problem-artifact-panel {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(260px, 0.36fr) minmax(0, 0.64fr);
  gap: clamp(28px, 4.2vw, 64px);
  align-items: center;
  padding: clamp(44px, 5vw, 70px);
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 220ms ease, transform 240ms cubic-bezier(0.16, 1, 0.3, 1);
}

.landing-page .problem-artifact-panel.is-active {
  opacity: 1;
  pointer-events: auto;
  transform: none;
}

.landing-page .problem-artifact-brief {
  display: grid;
  gap: 14px;
}

.landing-page .artifact-black-card {
  display: grid;
  gap: 12px;
  padding: 18px 20px;
  border-radius: 12px;
  color: #fff8ef;
  background: #11100f;
}

.landing-page .artifact-black-card span,
.landing-page .artifact-black-card em {
  color: rgba(255, 248, 239, 0.72);
  font-size: 12px;
  font-style: normal;
  font-weight: 760;
}

.landing-page .artifact-black-card p,
.landing-page .artifact-black-card strong,
.landing-page .artifact-black-card code {
  margin: 0;
  color: rgba(255, 248, 239, 0.92);
  font-size: 13px;
  line-height: 1.62;
}

.landing-page .artifact-black-card code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-weight: 700;
}

.landing-page .artifact-attachment-card div {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding-top: 10px;
  border-top: 1px solid rgba(255, 248, 239, 0.12);
}

.landing-page .artifact-document-card,
.landing-page .artifact-metric-report {
  min-width: 0;
  border-radius: 14px;
  background: var(--artifact-paper);
  box-shadow: 0 14px 28px rgba(71, 38, 27, 0.16);
}

.landing-page .artifact-document-card {
  padding: clamp(30px, 4vw, 52px);
}

.landing-page .artifact-kicker {
  margin: 0 0 10px;
  color: var(--artifact-accent);
  font-size: 13px;
  font-weight: 840;
}

.landing-page .artifact-document-card h3,
.landing-page .artifact-metric-report h3 {
  margin: 0;
  color: var(--artifact-ink);
  font-size: clamp(28px, 3vw, 42px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: 0;
  text-wrap: balance;
}

.landing-page .artifact-document-card > p:not(.artifact-kicker) {
  max-width: 62ch;
  margin: 18px 0 0;
  color: var(--artifact-muted);
  font-size: 15px;
  line-height: 1.76;
}

.landing-page .artifact-callout-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 30px;
}

.landing-page .artifact-callout-grid div {
  display: grid;
  gap: 7px;
  padding: 13px 14px;
  border: 1px solid rgba(21, 18, 15, 0.1);
  border-radius: 10px;
  background: #faf7ef;
}

.landing-page .artifact-callout-grid span,
.landing-page .artifact-path-list span {
  color: rgba(21, 18, 15, 0.55);
  font-size: 12px;
  font-weight: 720;
}

.landing-page .artifact-callout-grid strong,
.landing-page .artifact-path-list strong {
  color: var(--artifact-ink);
  font-size: 14px;
  line-height: 1.35;
}

.landing-page .artifact-path-list {
  display: grid;
  gap: 14px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.landing-page .artifact-path-list li {
  display: grid;
  grid-template-columns: 38px minmax(120px, 0.36fr) minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(21, 18, 15, 0.1);
}

.landing-page .artifact-path-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.landing-page .artifact-path-list em {
  color: var(--artifact-muted);
  font-size: 13.5px;
  font-style: normal;
  line-height: 1.58;
}

.landing-page .problem-artifact-panel-metrics {
  grid-template-columns: minmax(0, 0.66fr) minmax(240px, 0.34fr);
}

.landing-page .artifact-metric-report {
  padding: clamp(24px, 3.4vw, 42px);
}

.landing-page .artifact-window-dots {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
}

.landing-page .artifact-window-dots span {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: #ef655a;
}

.landing-page .artifact-window-dots span:nth-child(2) {
  background: #e6bd42;
}

.landing-page .artifact-window-dots span:nth-child(3) {
  background: #39b46c;
}

.landing-page .artifact-report-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 26px;
}

.landing-page .artifact-model-tabs {
  display: flex;
  gap: 6px;
  padding: 4px;
  border-radius: 10px;
  background: #f0eee8;
}

.landing-page .artifact-model-tabs span {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 10px;
  border-radius: 8px;
  color: rgba(21, 18, 15, 0.52);
  font-size: 12px;
  font-weight: 760;
}

.landing-page .artifact-model-tabs .is-active {
  color: var(--artifact-ink);
  background: #fffdf8;
}

.landing-page .artifact-metric-bars {
  display: grid;
  gap: 15px;
}

.landing-page .artifact-metric-bars article {
  display: grid;
  gap: 8px;
}

.landing-page .artifact-metric-bars article div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: baseline;
}

.landing-page .artifact-metric-bars span {
  color: rgba(21, 18, 15, 0.68);
  font-size: 13px;
  font-weight: 760;
}

.landing-page .artifact-metric-bars strong {
  color: var(--artifact-ink);
  font-size: 28px;
  font-weight: 900;
}

.landing-page .artifact-metric-bars i {
  position: relative;
  display: block;
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: #ece4db;
}

.landing-page .artifact-metric-bars i::before,
.landing-page .artifact-metric-bars i b {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  border-radius: inherit;
}

.landing-page .artifact-metric-bars i::before {
  width: var(--metric-before);
  background: #d6c8bd;
}

.landing-page .artifact-metric-bars i b {
  width: var(--metric-after);
  background: var(--artifact-accent);
}

.landing-page .artifact-metric-bars .metric-cost-row i b {
  background: #11100f;
}

.landing-page .artifact-metric-bars p {
  margin: 0;
  color: rgba(21, 18, 15, 0.54);
  font-size: 12px;
  line-height: 1.45;
}

.landing-page .artifact-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.landing-page .artifact-chip-row em {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 10px;
  border-radius: 999px;
  color: #11100f;
  background: #fff8ef;
  font-size: 12px;
  font-weight: 820;
}

.landing-page .artifact-reference-card h3 {
  margin-bottom: 24px;
}

.landing-page .artifact-reference-table {
  display: grid;
  border-top: 1px solid rgba(21, 18, 15, 0.12);
}

.landing-page .artifact-reference-table [role="row"] {
  display: grid;
  grid-template-columns: 64px 140px minmax(150px, 0.8fr) minmax(220px, 1fr);
  gap: 16px;
  align-items: start;
  padding: 14px 0;
  border-bottom: 1px solid rgba(21, 18, 15, 0.1);
  color: inherit;
  text-decoration: none;
}

.landing-page .artifact-reference-table [role="columnheader"] {
  color: rgba(21, 18, 15, 0.54);
  font-size: 12px;
  font-weight: 760;
}

.landing-page .artifact-reference-table a:hover strong,
.landing-page .artifact-reference-table a:focus-visible strong {
  color: #9f4728;
}

.landing-page .artifact-reference-table a:focus-visible {
  outline: 2px solid rgba(215, 111, 77, 0.28);
  outline-offset: 4px;
}

.landing-page .artifact-reference-table span,
.landing-page .artifact-reference-table em {
  color: rgba(21, 18, 15, 0.66);
  font-size: 12.5px;
  font-style: normal;
  line-height: 1.55;
}

.landing-page .artifact-reference-table strong {
  color: var(--artifact-ink);
  font-size: 14px;
  line-height: 1.48;
}

@media (max-width: 1180px) {
  .landing-page .problem-artifact-section.problem-solution-v2 {
    width: min(100%, calc(100vw - 44px)) !important;
    padding-top: 82px !important;
  }

  .landing-page .problem-artifact-header {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .landing-page .problem-artifact-title h2 {
    max-width: 18ch;
    font-size: 38px;
  }

  .landing-page .problem-artifact-canvas {
    min-height: 720px;
  }

  .landing-page .problem-artifact-panel,
  .landing-page .problem-artifact-panel-metrics {
    grid-template-columns: 1fr;
    gap: 22px;
    padding: 30px;
  }

  .landing-page .problem-artifact-brief {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    order: 2;
  }

  .landing-page .problem-artifact-panel-metrics .problem-artifact-brief {
    order: 2;
  }
}

@media (max-width: 760px) {
  .landing-page .problem-artifact-section.problem-solution-v2 {
    width: min(100%, calc(100vw - 28px)) !important;
    padding-top: 72px !important;
    padding-bottom: 76px !important;
  }

  .landing-page .problem-artifact-title h2 {
    font-size: 31px;
  }

  .landing-page .problem-artifact-intro p {
    font-size: 14px;
    line-height: 1.68;
  }

  .landing-page .problem-artifact-tabs {
    width: 100%;
    overflow-x: auto;
    scrollbar-width: none;
  }

  .landing-page .problem-artifact-tabs::-webkit-scrollbar {
    display: none;
  }

  .landing-page .problem-artifact-tabs button {
    flex: 0 0 auto;
    min-height: 38px;
    padding: 0 13px;
    font-size: 13px;
  }

  .landing-page .problem-artifact-canvas {
    min-height: 0;
    border-radius: 12px;
  }

  .landing-page .problem-artifact-panel {
    position: relative;
    display: none;
    grid-template-columns: 1fr;
    padding: 18px;
    opacity: 1;
    transform: none;
  }

  .landing-page .problem-artifact-panel.is-active {
    display: grid;
  }

  .landing-page .problem-artifact-brief {
    grid-template-columns: 1fr;
  }

  .landing-page .artifact-document-card,
  .landing-page .artifact-metric-report {
    padding: 22px;
    border-radius: 12px;
  }

  .landing-page .artifact-document-card h3,
  .landing-page .artifact-metric-report h3 {
    font-size: 26px;
  }

  .landing-page .artifact-callout-grid,
  .landing-page .artifact-path-list li,
  .landing-page .artifact-report-head,
  .landing-page .artifact-reference-table [role="row"] {
    grid-template-columns: 1fr;
  }

  .landing-page .artifact-report-head {
    display: grid;
    gap: 14px;
  }

  .landing-page .artifact-reference-table [role="row"] {
    gap: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .landing-page .problem-artifact-panel,
  .landing-page .problem-artifact-tabs button {
    transition: none;
  }
}

/* 20260627: fit dense report/reference panes inside the artifact canvas. */
.landing-page .problem-artifact-canvas {
  min-height: clamp(590px, 62vh, 720px);
}

.landing-page .problem-artifact-panel {
  grid-template-columns: minmax(240px, 0.34fr) minmax(0, 0.66fr);
  gap: clamp(26px, 3.6vw, 54px);
  padding: clamp(40px, 4.4vw, 62px);
}

.landing-page .problem-artifact-panel-metrics {
  grid-template-columns: minmax(0, 0.66fr) minmax(230px, 0.34fr);
}

.landing-page .problem-artifact-panel-metrics .artifact-metric-report {
  padding: 24px 34px 26px;
}

.landing-page .artifact-metric-report .artifact-window-dots {
  margin-bottom: 18px;
}

.landing-page .artifact-metric-report .artifact-report-head {
  margin-bottom: 20px;
}

.landing-page .artifact-metric-report h3 {
  font-size: clamp(27px, 2.5vw, 36px);
}

.landing-page .artifact-metric-bars {
  gap: 12px;
}

.landing-page .artifact-metric-bars article {
  gap: 6px;
}

.landing-page .artifact-metric-bars strong {
  font-size: 24px;
}

.landing-page .artifact-reference-card {
  padding: 30px 36px 34px;
}

.landing-page .artifact-reference-card h3 {
  margin-bottom: 18px;
  font-size: clamp(27px, 2.6vw, 38px);
}

.landing-page .artifact-reference-table [role="row"] {
  grid-template-columns: 48px 104px minmax(124px, 0.82fr) minmax(180px, 1.18fr);
  gap: 10px;
  padding: 10px 0;
}

.landing-page .artifact-reference-table span,
.landing-page .artifact-reference-table em {
  font-size: 11.8px;
  line-height: 1.48;
}

.landing-page .artifact-reference-table strong {
  font-size: 13px;
  line-height: 1.42;
}

@media (max-width: 1180px) {
  .landing-page .problem-artifact-canvas {
    min-height: 760px;
  }
}

@media (max-width: 760px) {
  .landing-page .problem-artifact-canvas {
    min-height: 0;
  }

  .landing-page .problem-artifact-panel,
  .landing-page .problem-artifact-panel-metrics {
    position: relative;
    display: none;
    grid-template-columns: 1fr !important;
    gap: 18px;
    padding: 18px !important;
    opacity: 1;
    transform: none;
  }

  .landing-page .problem-artifact-panel.is-active {
    display: grid;
  }

  .landing-page .problem-artifact-brief,
  .landing-page .metric-side-brief {
    grid-template-columns: 1fr !important;
    order: 2;
  }

  .landing-page .problem-artifact-panel-metrics .artifact-metric-report,
  .landing-page .artifact-reference-card {
    padding: 22px;
  }

  .landing-page .artifact-reference-table [role="row"] {
    grid-template-columns: 1fr !important;
    gap: 6px;
  }
}

/* 20260627: align artifact pages closer to Claude's scrollable paper pattern. */
.landing-page .problem-artifact-shell {
  gap: 18px !important;
}

.landing-page .problem-artifact-tabs {
  gap: 2px !important;
  padding: 4px !important;
  border-radius: 12px !important;
  background: #f0eee8 !important;
}

.landing-page .problem-artifact-tabs button {
  min-height: 34px !important;
  padding: 0 12px !important;
  border-radius: 9px !important;
  font-size: 12.5px !important;
  font-weight: 760 !important;
}

.landing-page .problem-artifact-canvas {
  min-height: clamp(610px, 65vh, 760px) !important;
  border-radius: 18px !important;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.09), transparent 38%),
    linear-gradient(122deg, var(--artifact-canvas-soft) 0%, var(--artifact-canvas) 52%, var(--artifact-canvas-deep) 100%) !important;
}

.landing-page .problem-artifact-canvas[data-active-panel="problem"] {
  --artifact-canvas: #dc7a58;
  --artifact-canvas-soft: #e58d70;
  --artifact-canvas-deep: #c96650;
}

.landing-page .problem-artifact-canvas[data-active-panel="solution"] {
  --artifact-canvas: #6c9dca;
  --artifact-canvas-soft: #8ab7de;
  --artifact-canvas-deep: #4f80af;
}

.landing-page .problem-artifact-canvas[data-active-panel="references"] {
  --artifact-canvas: #c6c2da;
  --artifact-canvas-soft: #d8d4e7;
  --artifact-canvas-deep: #aaa5c8;
}

.landing-page .problem-artifact-canvas[data-active-panel="metrics"] {
  --artifact-canvas: #c8618a;
  --artifact-canvas-soft: #d9779c;
  --artifact-canvas-deep: #ae517a;
}

.landing-page .problem-artifact-canvas[data-active-panel="references"]::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.22;
  background-image:
    linear-gradient(rgba(17, 16, 13, 0.18) 1px, transparent 1px),
    linear-gradient(90deg, rgba(17, 16, 13, 0.18) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}

.landing-page .problem-artifact-panel {
  grid-template-columns: minmax(290px, 0.38fr) minmax(0, 0.62fr) !important;
  gap: clamp(34px, 5vw, 74px) !important;
  padding: clamp(48px, 5.2vw, 76px) clamp(48px, 5.4vw, 84px) !important;
}

.landing-page .problem-artifact-panel-references {
  grid-template-columns: minmax(0, 0.68fr) minmax(260px, 0.32fr) !important;
}

.landing-page .problem-artifact-panel-metrics {
  grid-template-columns: minmax(0, 0.62fr) minmax(280px, 0.38fr) !important;
}

.landing-page .artifact-report-paper {
  display: block !important;
  height: clamp(450px, 52vh, 620px);
  overflow: hidden;
  padding: 0 !important;
  border-radius: 14px !important;
  background: #fffdf8 !important;
}

.landing-page .artifact-paper-scroll {
  height: 100%;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: clamp(34px, 4vw, 54px);
  scrollbar-width: thin;
  scrollbar-color: rgba(21, 18, 15, 0.3) transparent;
}

.landing-page .artifact-paper-scroll::-webkit-scrollbar {
  width: 8px;
}

.landing-page .artifact-paper-scroll::-webkit-scrollbar-thumb {
  border-radius: 999px;
  background: rgba(21, 18, 15, 0.24);
}

.landing-page .artifact-paper-scroll h3 {
  max-width: 15ch;
  margin-bottom: 26px !important;
  font-size: clamp(34px, 3.6vw, 52px) !important;
  line-height: 1.12 !important;
}

.landing-page .artifact-paper-scroll h4 {
  margin: 24px 0 10px;
  color: var(--artifact-ink);
  font-size: clamp(20px, 2vw, 28px);
  font-weight: 880;
  line-height: 1.24;
}

.landing-page .artifact-paper-scroll p,
.landing-page .artifact-paper-scroll li {
  color: rgba(21, 18, 15, 0.72);
  font-size: 15px;
  line-height: 1.78;
}

.landing-page .artifact-paper-scroll p {
  margin: 0 0 14px;
}

.landing-page .artifact-paper-scroll ul {
  display: grid;
  gap: 8px;
  margin: 18px 0 10px;
  padding-left: 1.3em;
}

.landing-page .artifact-paper-scroll li strong {
  color: var(--artifact-ink);
}

.landing-page .artifact-paper-scroll .artifact-path-list {
  margin: 22px 0;
}

.landing-page .artifact-paper-scroll .artifact-reference-table {
  margin-top: 24px;
}

.landing-page .artifact-reference-side {
  display: grid;
  gap: 28px;
  align-content: center;
  color: var(--artifact-ink);
}

.landing-page .artifact-reference-visual {
  display: grid;
  place-items: center;
  width: min(280px, 100%);
  aspect-ratio: 1;
  margin: 0;
  border-radius: 16px;
  background: #c5c1d6;
}

.landing-page .artifact-reference-visual svg {
  width: 76%;
  height: 76%;
  overflow: visible;
}

.landing-page .artifact-reference-visual .reference-paper {
  fill: #fffdf8;
}

.landing-page .artifact-reference-visual .reference-paper-back {
  fill: rgba(255, 253, 248, 0.78);
}

.landing-page .artifact-reference-visual .reference-line {
  fill: none;
  stroke: #11100f;
  stroke-width: 8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.landing-page .artifact-reference-note {
  display: grid;
  gap: 10px;
  padding-top: 28px;
  border-top: 1px solid rgba(21, 18, 15, 0.16);
}

.landing-page .artifact-reference-note h4 {
  margin: 0;
  color: var(--artifact-ink);
  font-size: 22px;
  font-weight: 880;
  line-height: 1.22;
}

.landing-page .artifact-reference-note p:not(.artifact-kicker) {
  margin: 0;
  color: rgba(21, 18, 15, 0.72);
  font-size: 15px;
  line-height: 1.74;
}

@media (max-width: 1180px) {
  .landing-page .problem-artifact-panel,
  .landing-page .problem-artifact-panel-references,
  .landing-page .problem-artifact-panel-metrics {
    grid-template-columns: 1fr !important;
    padding: 30px !important;
  }

  .landing-page .artifact-report-paper {
    height: auto;
    min-height: 420px;
    max-height: none;
  }

  .landing-page .artifact-paper-scroll {
    height: auto;
    max-height: 560px;
  }

  .landing-page .artifact-reference-side {
    grid-template-columns: minmax(180px, 260px) minmax(0, 1fr);
    align-items: center;
  }
}

@media (max-width: 760px) {
  .landing-page .problem-artifact-tabs button {
    min-height: 34px !important;
    padding: 0 11px !important;
    font-size: 12px !important;
  }

  .landing-page .problem-artifact-panel,
  .landing-page .problem-artifact-panel-references,
  .landing-page .problem-artifact-panel-metrics {
    grid-template-columns: 1fr !important;
    padding: 18px !important;
  }

  .landing-page .artifact-report-paper {
    height: auto;
    min-height: 0;
  }

  .landing-page .artifact-paper-scroll {
    max-height: 520px;
    padding: 24px;
  }

  .landing-page .artifact-paper-scroll h3 {
    max-width: 100%;
    font-size: 29px !important;
  }

  .landing-page .artifact-reference-side {
    grid-template-columns: 1fr;
  }

  .landing-page .artifact-reference-visual {
    width: min(240px, 78vw);
    justify-self: center;
  }
}

/* 20260627: align report-paper pages to the canvas floor and simplify metrics as one Mac-style window. */
.landing-page .problem-artifact-panel:not(.problem-artifact-panel-metrics) {
  --artifact-panel-top: clamp(54px, 5.3vw, 78px);
  --artifact-panel-x: clamp(48px, 5.4vw, 84px);
  padding: var(--artifact-panel-top) var(--artifact-panel-x) 0 !important;
}

.landing-page .problem-artifact-panel:not(.problem-artifact-panel-metrics) .artifact-report-paper {
  align-self: end;
  height: calc(100% - var(--artifact-panel-top)) !important;
}

.landing-page .problem-artifact-panel-metrics {
  grid-template-columns: minmax(0, 1fr) !important;
  justify-items: center;
  align-items: center;
  padding: clamp(54px, 5.3vw, 78px) clamp(48px, 5.4vw, 84px) !important;
}

.landing-page .problem-artifact-panel-metrics .metric-side-brief {
  display: none !important;
}

.landing-page .problem-artifact-panel-metrics .artifact-metric-report {
  width: min(940px, 100%);
  overflow: hidden;
  padding: 0 !important;
  border-radius: 16px;
  background: #fffdf8;
  box-shadow: 0 18px 34px rgba(69, 33, 48, 0.16);
}

.landing-page .problem-artifact-panel-metrics .artifact-window-dots {
  margin: 0 !important;
  padding: 16px 22px 14px;
  border-bottom: 1px solid rgba(21, 18, 15, 0.1);
  background: rgba(250, 247, 240, 0.9);
}

.landing-page .problem-artifact-panel-metrics .artifact-report-head {
  margin: 0;
  padding: 26px 34px 20px;
}

.landing-page .problem-artifact-panel-metrics .artifact-metric-bars {
  gap: 0;
  padding: 0 34px 34px;
}

.landing-page .problem-artifact-panel-metrics .artifact-metric-bars article {
  gap: 8px;
  padding: 17px 0;
  border-top: 1px solid rgba(21, 18, 15, 0.1);
}

.landing-page .problem-artifact-panel-metrics .artifact-metric-bars article:first-child {
  border-top: 0;
}

.landing-page .problem-artifact-panel-metrics .artifact-metric-bars strong {
  font-size: 27px;
}

@media (min-width: 1181px) {
  .landing-page .problem-artifact-panel-metrics .artifact-metric-bars {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 34px;
  }

  .landing-page .problem-artifact-panel-metrics .artifact-metric-bars article:nth-child(-n + 2) {
    border-top: 0;
  }
}

@media (max-width: 1180px) {
  .landing-page .problem-artifact-panel:not(.problem-artifact-panel-metrics) {
    padding: 30px !important;
  }

  .landing-page .problem-artifact-panel:not(.problem-artifact-panel-metrics) .artifact-report-paper {
    height: auto !important;
  }

  .landing-page .problem-artifact-panel-metrics {
    padding: 30px !important;
  }
}

/* 20260627: match Claude artifact behavior: the paper column scrolls, not an inner text layer. */
.landing-page .problem-artifact-panel:not(.problem-artifact-panel-metrics) {
  align-items: stretch !important;
}

.landing-page .problem-artifact-panel:not(.problem-artifact-panel-metrics) .problem-artifact-brief,
.landing-page .problem-artifact-panel:not(.problem-artifact-panel-metrics) .artifact-reference-side {
  align-self: center;
}

.landing-page .problem-artifact-panel:not(.problem-artifact-panel-metrics) .artifact-report-paper {
  align-self: stretch;
  height: auto !important;
  min-height: 0;
  overflow-x: hidden;
  overflow-y: auto;
  scrollbar-width: none;
  overscroll-behavior: contain;
}

.landing-page .problem-artifact-panel:not(.problem-artifact-panel-metrics) .artifact-report-paper::-webkit-scrollbar {
  width: 0;
  height: 0;
}

.landing-page .problem-artifact-panel:not(.problem-artifact-panel-metrics) .artifact-paper-scroll {
  height: auto !important;
  min-height: 100%;
  overflow: visible !important;
  max-height: none !important;
}

@media (max-width: 1180px) {
  .landing-page .problem-artifact-panel:not(.problem-artifact-panel-metrics) {
    align-items: start !important;
  }

  .landing-page .problem-artifact-panel:not(.problem-artifact-panel-metrics) .artifact-report-paper {
    overflow: visible;
  }
}

/* 20260627: put the paper visual on the long document, leaving the column as a clipped viewport. */
.landing-page .problem-artifact-panel:not(.problem-artifact-panel-metrics) .artifact-report-paper {
  border-radius: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
}

.landing-page .problem-artifact-panel:not(.problem-artifact-panel-metrics) .artifact-paper-scroll {
  display: block;
  border-radius: 14px;
  background: #fffdf8;
  box-shadow: 0 14px 28px rgba(71, 38, 27, 0.14);
}

@media (max-width: 1180px) {
  .landing-page .problem-artifact-panel:not(.problem-artifact-panel-metrics) .artifact-report-paper {
    overflow: visible;
  }
}