:root {
  color-scheme: light;
  --bone: #f2f0e9;
  --bone-strong: #e9e6dc;
  --ink: #111827;
  --ink-deep: #071321;
  --oxide: #e35d35;
  --alloy: #8b949e;
  --rule: rgb(17 24 39 / 24%);
  --rule-dark: rgb(242 240 233 / 24%);
  --display-latin: "Arial Narrow", "DIN Condensed", "Roboto Condensed", "Helvetica Neue", sans-serif;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --page-gutter: clamp(20px, 3.2vw, 56px);
  --header-height: 102px;
  --focus-ring: 0 0 0 3px rgb(227 93 53 / 34%);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--bone);
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background: var(--bone);
  font-family: var(--sans);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

img,
svg {
  display: block;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  color: var(--bone);
  background: var(--ink);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: var(--header-height);
  padding: 0 var(--page-gutter);
  border-bottom: 1px solid var(--rule);
  background: var(--bone);
  transition: color 220ms ease, background-color 220ms ease, border-color 220ms ease;
}

.site-header.is-dark {
  color: var(--bone);
  border-bottom-color: var(--rule-dark);
  background: var(--ink-deep);
}

.site-header.is-dark .header-contact:hover {
  color: var(--ink-deep);
  background: var(--bone);
  border-color: var(--bone);
}

.wordmark {
  justify-self: start;
  font-family: var(--display-latin);
  font-size: clamp(28px, 2vw, 38px);
  font-stretch: condensed;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.045em;
}

.primary-nav {
  display: flex;
  align-self: stretch;
  align-items: center;
  gap: clamp(38px, 4.3vw, 76px);
}

.nav-link {
  position: relative;
  display: grid;
  place-items: center;
  align-self: stretch;
  min-width: 48px;
  padding-top: 2px;
  font-family: var(--display-latin);
  font-size: 16px;
  font-stretch: condensed;
  font-weight: 700;
  line-height: 1;
}

.nav-link::after {
  position: absolute;
  bottom: 21px;
  left: 50%;
  width: 0;
  height: 3px;
  background: var(--oxide);
  content: "";
  transform: translateX(-50%);
  transition: width 180ms ease;
}

.nav-link:hover::after,
.nav-link.is-active::after {
  width: 60px;
}

.header-contact,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  min-height: 52px;
  padding: 0 30px;
  border: 1px solid currentColor;
  border-radius: 0;
  font-size: 17px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.04em;
  transition: color 180ms ease, background-color 180ms ease, border-color 180ms ease;
}

.header-contact {
  justify-self: end;
}

.header-contact svg,
.button svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: square;
  stroke-linejoin: miter;
  stroke-width: 1.6;
}

.header-contact:hover {
  color: var(--bone);
  background: var(--ink);
  border-color: var(--ink);
}

.section-bone {
  background-color: var(--bone);
  background-image:
    radial-gradient(circle at 20% 30%, rgb(255 255 255 / 45%), transparent 34%),
    radial-gradient(circle at 80% 75%, rgb(17 24 39 / 2.5%), transparent 38%);
}

.section-ink {
  color: var(--bone);
  background-color: var(--ink-deep);
  background-image:
    radial-gradient(circle at 72% 34%, rgb(34 56 78 / 34%), transparent 42%),
    linear-gradient(115deg, rgb(255 255 255 / 1.5%), transparent 36%);
}

section[id] {
  scroll-margin-top: var(--header-height);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 41%) minmax(0, 59%);
  min-height: calc(100svh - var(--header-height));
}

.hero-copy {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
  padding: clamp(72px, 9vh, 112px) clamp(30px, 3.25vw, 56px) 42px var(--page-gutter);
  border-right: 1px solid var(--rule);
}

.hero-signal {
  width: 100%;
  height: 132px;
  margin-bottom: clamp(8px, 1.8vh, 20px);
  overflow: visible;
  fill: none;
  stroke: var(--oxide);
  stroke-linecap: square;
  stroke-linejoin: round;
  stroke-width: 1.65;
  vector-effect: non-scaling-stroke;
}

.hero-signal circle {
  fill: var(--bone);
}

.hero-copy-body h1 {
  max-width: 650px;
  margin: 0;
  font-size: clamp(52px, 4.05vw, 68px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.045em;
  white-space: nowrap;
}

.hero-copy-body p {
  max-width: 590px;
  margin: 22px 0 0;
  font-size: clamp(20px, 1.55vw, 26px);
  font-weight: 400;
  line-height: 1.55;
  letter-spacing: 0.015em;
}

.button-solid {
  min-width: 204px;
  margin-top: 34px;
  color: white;
  background: var(--oxide);
  border-color: var(--oxide);
}

.button-solid:hover {
  color: var(--oxide);
  background: transparent;
}

.proof-rail {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: clamp(52px, 8vh, 78px) 0 0;
  padding: 34px 0 0;
  border-top: 1px solid var(--rule);
  list-style: none;
}

.proof-rail li {
  display: flex;
  align-items: center;
  gap: 13px;
  min-width: 0;
  padding: 0 18px;
  border-right: 1px solid var(--rule);
  font-size: clamp(14px, 1.08vw, 18px);
  font-weight: 600;
  line-height: 1.35;
  white-space: nowrap;
}

.proof-rail li:first-child {
  padding-left: 0;
}

.proof-rail li:last-child {
  padding-right: 0;
  border-right: 0;
}

.proof-rail svg {
  flex: 0 0 24px;
  width: 24px;
  height: 24px;
  fill: none;
  stroke: var(--oxide);
  stroke-linecap: square;
  stroke-linejoin: miter;
  stroke-width: 1.5;
}

.hero-media {
  align-self: center;
  width: calc(100% - clamp(36px, 4vw, 68px));
  margin: 0 auto;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: #dce3e8;
  box-shadow: 0 18px 45px rgb(17 24 39 / 9%);
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transform: scale(1.045);
}

.vehicle-lab {
  min-height: calc(100svh - var(--header-height));
  padding: 28px var(--page-gutter) 0;
}

.lab-main {
  display: grid;
  grid-template-columns: minmax(250px, 20.5%) minmax(0, 1fr);
  gap: clamp(26px, 3.2vw, 54px);
  min-height: clamp(610px, 72vh, 680px);
}

.lab-rail {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 27px 0 28px;
}

.case-label {
  margin: 0;
  color: var(--oxide);
  font-family: var(--display-latin);
  font-size: 20px;
  font-stretch: condensed;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.1em;
}

.case-rule {
  display: block;
  width: 56px;
  height: 3px;
  margin-top: 18px;
  background: var(--oxide);
}

.lab-rail h2 {
  margin: 34px 0 0;
  font-family: var(--display-latin);
  font-size: clamp(54px, 4.4vw, 74px);
  font-stretch: condensed;
  font-weight: 800;
  line-height: 0.98;
  letter-spacing: -0.035em;
}

.lab-kicker {
  margin: 30px 0 0;
  color: rgb(242 240 233 / 67%);
  font-size: clamp(18px, 1.45vw, 24px);
  line-height: 1.45;
  letter-spacing: 0.06em;
}

.wheel-response {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-top: auto;
  color: rgb(242 240 233 / 70%);
  font-size: clamp(17px, 1.3vw, 22px);
  letter-spacing: 0.08em;
}

.wheel-axis {
  position: relative;
  display: block;
  width: 2px;
  height: 148px;
  margin-left: 24px;
  background: var(--oxide);
}

.wheel-axis::before,
.wheel-axis::after {
  position: absolute;
  left: 50%;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--oxide);
  content: "";
  transform: translate(-50%, -50%);
}

.wheel-axis::before {
  top: 0;
}

.wheel-axis::after {
  top: 100%;
}

.lab-stage {
  display: grid;
  place-items: center;
  min-width: 0;
}

.lab-frame {
  position: relative;
  width: 100%;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid rgb(242 240 233 / 28%);
  border-radius: 4px;
  background: #dce3e8;
  box-shadow: 0 24px 70px rgb(0 0 0 / 25%);
}

.lab-poster,
.lab-frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.lab-poster {
  object-fit: cover;
}

.lab-frame iframe {
  z-index: 2;
  opacity: 0;
  background: transparent;
  transition: opacity 280ms ease;
}

.lab-frame.is-loaded iframe {
  opacity: 1;
}

.lab-facts {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) minmax(0, 2.6fr) auto;
  align-items: center;
  gap: 32px;
  min-height: 116px;
  border-top: 1px solid var(--rule-dark);
}

.lab-fact-name {
  display: flex;
  align-items: center;
  gap: 30px;
  min-width: 0;
}

.lab-fact-name > span {
  display: block;
  width: 3px;
  height: 42px;
  background: var(--oxide);
}

.lab-fact-name strong {
  font-family: var(--display-latin);
  font-size: 20px;
  font-stretch: condensed;
  line-height: 1;
  letter-spacing: 0.12em;
}

.lab-facts p {
  margin: 0;
  color: rgb(242 240 233 / 62%);
  font-size: clamp(16px, 1.25vw, 21px);
  line-height: 1.5;
  letter-spacing: 0.1em;
}

.button-outline-dark {
  min-width: 290px;
  color: var(--oxide);
  border-color: var(--oxide);
}

.button-outline-dark:hover {
  color: var(--ink-deep);
  background: var(--oxide);
}

.knowledge {
  min-height: calc(100svh - var(--header-height));
  padding: 50px var(--page-gutter) 0;
}

.knowledge-header .case-label {
  font-size: 22px;
}

.knowledge-header h2 {
  margin: 26px 0 0;
  font-size: clamp(48px, 4.3vw, 72px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.knowledge-title-rule {
  display: block;
  width: 64px;
  height: 4px;
  margin-top: 26px;
  background: var(--oxide);
}

.knowledge-header > p:last-child {
  margin: 18px 0 0;
  font-size: clamp(19px, 1.5vw, 25px);
  line-height: 1.5;
  letter-spacing: 0.07em;
}

.knowledge-flow {
  display: grid;
  grid-template-columns: 0.85fr 1.18fr 1.12fr 1.75fr 0.92fr;
  gap: clamp(32px, 3.4vw, 58px);
  align-items: start;
  margin: 52px 0 0;
  padding: 0;
  list-style: none;
}

.knowledge-stage {
  position: relative;
  min-width: 0;
}

.knowledge-stage:not(:last-child)::after {
  position: absolute;
  top: 49%;
  right: clamp(-46px, -2.9vw, -30px);
  width: clamp(28px, 2.3vw, 40px);
  height: 12px;
  border-top: 1px solid var(--ink);
  content: "";
}

.knowledge-stage:not(:last-child)::before {
  position: absolute;
  z-index: 2;
  top: calc(49% - 4px);
  right: clamp(-46px, -2.9vw, -30px);
  width: 9px;
  height: 9px;
  border-top: 1px solid var(--ink);
  border-right: 1px solid var(--ink);
  content: "";
  transform: rotate(45deg);
}

.knowledge-stage h3 {
  margin: 0 0 20px;
  text-align: center;
  font-family: var(--display-latin);
  font-size: 17px;
  font-stretch: condensed;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.12em;
}

.source-book {
  position: relative;
  display: grid;
  place-items: center;
  width: 100%;
  max-width: 200px;
  height: 260px;
  margin: 0 auto;
  border: 2px solid var(--ink);
  box-shadow: inset 9px 0 0 var(--bone), inset 11px 0 0 var(--ink);
}

.source-book::before,
.source-book::after {
  position: absolute;
  left: 28px;
  right: 28px;
  height: 1px;
  background: var(--ink);
  content: "";
}

.source-book::before {
  top: 30px;
}

.source-book::after {
  bottom: 34px;
}

.source-book span {
  font-family: var(--display-latin);
  font-size: clamp(42px, 3.3vw, 56px);
  font-stretch: condensed;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.035em;
}

.source-book i::before,
.source-book i::after {
  position: absolute;
  width: 18px;
  height: 18px;
  border-color: var(--ink);
  content: "";
}

.source-book i::before {
  top: -10px;
  right: -10px;
  border-top: 1px solid;
  border-right: 1px solid;
}

.source-book i::after {
  bottom: -10px;
  left: -10px;
  border-bottom: 1px solid;
  border-left: 1px solid;
}

.stage-diagram {
  width: 100%;
  height: 260px;
  fill: none;
  stroke: var(--ink);
  stroke-linecap: square;
  stroke-linejoin: miter;
  stroke-width: 1.6;
}

.stage-diagram .diagram-bars {
  stroke: rgb(17 24 39 / 48%);
  stroke-width: 6;
}

.stage-diagram .diagram-dashed {
  stroke: rgb(17 24 39 / 62%);
  stroke-dasharray: 6 6;
}

.stage-answer {
  align-self: center;
}

.cited-answer {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  height: 96px;
  margin-top: 78px;
  border: 1px solid rgb(17 24 39 / 44%);
  border-top: 3px solid var(--oxide);
}

.cited-answer > div {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
  padding: 18px;
  border-right: 1px dashed rgb(227 93 53 / 72%);
}

.cited-answer > div:last-child {
  border-right: 0;
}

.cited-answer b {
  position: absolute;
  top: -33px;
  left: 50%;
  color: var(--oxide);
  font-family: var(--display-latin);
  font-size: 16px;
  font-weight: 500;
  transform: translateX(-50%);
}

.cited-answer span {
  display: block;
  width: 78%;
  height: 6px;
  background: rgb(17 24 39 / 38%);
}

.cited-answer span:nth-of-type(2) {
  width: 64%;
}

.review-gate {
  width: 100%;
  height: 260px;
  fill: none;
  stroke: var(--ink);
  stroke-linecap: square;
  stroke-linejoin: miter;
  stroke-width: 1.7;
}

.knowledge-footer {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 32px;
  min-height: 112px;
  margin-top: 44px;
  border-top: 1px solid var(--rule);
}

.knowledge-footer ul {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 0;
  padding: 0;
  list-style: none;
}

.knowledge-footer li {
  display: flex;
  align-items: center;
  gap: 22px;
  min-height: 54px;
  padding: 0 34px;
  border-right: 1px solid var(--rule);
  font-size: 17px;
  letter-spacing: 0.05em;
}

.knowledge-footer li:first-child {
  padding-left: 34px;
}

.knowledge-footer li i {
  width: 11px;
  height: 11px;
  border: 2px solid currentColor;
  border-radius: 50%;
}

.knowledge-footer li:first-child i {
  border-color: var(--oxide);
}

.knowledge-link {
  display: inline-flex;
  align-items: center;
  gap: 32px;
  padding: 20px 24px;
  color: var(--oxide);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.knowledge-link svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
}

.classroom {
  min-height: calc(100svh - var(--header-height));
  padding: 68px var(--page-gutter) 52px;
  color: var(--ink);
  background: var(--oxide);
}

.classroom-main {
  display: grid;
  grid-template-columns: minmax(0, 56%) minmax(0, 44%);
  align-items: center;
  min-height: clamp(480px, 58vh, 555px);
}

.classroom-count {
  font-family: var(--display-latin);
  font-size: clamp(300px, 31vw, 520px);
  font-stretch: condensed;
  font-weight: 900;
  line-height: 0.72;
  letter-spacing: -0.085em;
}

.classroom-count span {
  display: inline-block;
  margin-left: 0.02em;
  font-size: 0.46em;
  font-weight: 700;
  line-height: 1;
  vertical-align: 0.34em;
  letter-spacing: -0.02em;
}

.classroom-copy {
  justify-self: center;
  min-width: min(100%, 540px);
  padding-left: clamp(20px, 4vw, 74px);
}

.classroom-copy h2 {
  margin: 0;
  font-size: clamp(50px, 4.5vw, 76px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.classroom-copy p {
  margin: 26px 0 0;
  font-size: clamp(20px, 1.55vw, 26px);
  line-height: 1.5;
  letter-spacing: 0.08em;
}

.button-outline-ink {
  min-width: 222px;
  margin-top: 52px;
  color: var(--ink);
  background: transparent;
}

.button-outline-ink:hover {
  color: var(--oxide);
  background: var(--ink);
  border-color: var(--ink);
}

.episode-index {
  margin-top: 22px;
}

.episode-index > p {
  margin: 0 0 34px;
  font-family: var(--display-latin);
  font-size: 19px;
  font-stretch: condensed;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.09em;
}

.episode-track {
  position: relative;
  display: grid;
  grid-template-columns: 52px repeat(9, minmax(42px, 1fr)) 30px repeat(5, minmax(42px, 1fr)) 58px 46px;
  align-items: center;
  min-width: 1040px;
}

.episode-track::before {
  position: absolute;
  z-index: 0;
  top: 50%;
  left: 24px;
  right: 44px;
  height: 2px;
  background: var(--ink);
  content: "";
  transform: translateY(-50%);
}

.episode-tick,
.episode-gap {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: end center;
  height: 54px;
  padding-top: 31px;
  font-family: var(--display-latin);
  font-size: 14px;
  font-stretch: condensed;
  font-weight: 700;
  line-height: 1;
}

.episode-tick::before {
  position: absolute;
  top: 13px;
  left: 50%;
  width: 1px;
  height: 13px;
  background: var(--ink);
  content: "";
}

.episode-gap {
  padding-top: 18px;
  background: var(--oxide);
  font-size: 17px;
}

.episode-node {
  position: relative;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: var(--oxide);
  font-family: var(--display-latin);
  font-size: 13px;
  font-stretch: condensed;
  font-weight: 800;
}

.episode-arrow {
  position: relative;
  z-index: 2;
  width: 46px;
  height: 20px;
  fill: none;
  stroke: var(--ink);
  stroke-linecap: square;
  stroke-linejoin: miter;
  stroke-width: 2;
}

.method {
  min-height: calc(100svh - var(--header-height));
  padding: 76px var(--page-gutter) 0;
}

.method-header > p {
  margin: 0;
  color: var(--oxide);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.08em;
}

.method-header h2 {
  margin: 32px 0 0;
  font-size: clamp(50px, 4.25vw, 70px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.035em;
}

.method-map {
  display: grid;
  grid-template-columns: minmax(165px, 12%) minmax(0, 1fr) minmax(126px, 10%);
  grid-template-rows: repeat(2, minmax(125px, auto));
  column-gap: 42px;
  row-gap: 28px;
  align-items: center;
  margin-top: clamp(74px, 10vh, 104px);
}

.method-role {
  display: flex;
  align-items: baseline;
  gap: 10px;
  white-space: nowrap;
}

.method-role strong {
  font-family: var(--display-latin);
  font-size: 40px;
  font-stretch: condensed;
  font-weight: 900;
  line-height: 1;
}

.method-role span {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.method-nodes {
  position: relative;
  display: grid;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
}

.human-nodes {
  grid-template-columns: repeat(3, minmax(90px, 1fr));
  max-width: 610px;
}

.ai-nodes {
  grid-template-columns: repeat(6, minmax(76px, 1fr));
}

.method-nodes li {
  position: relative;
  z-index: 2;
  display: grid;
  place-items: center;
  justify-self: center;
  width: clamp(80px, 6vw, 96px);
  height: clamp(76px, 5.8vw, 92px);
  border: 1px solid rgb(17 24 39 / 55%);
  background: var(--bone);
  font-size: clamp(15px, 1.05vw, 18px);
  line-height: 1.25;
  letter-spacing: 0.03em;
}

.method-nodes li:not(:last-child)::after {
  position: absolute;
  z-index: -1;
  top: 50%;
  left: 100%;
  width: calc((100% - clamp(80px, 6vw, 96px)) + 34px);
  height: 1px;
  background: var(--ink);
  content: "";
}

.method-nodes li:not(:last-child)::before {
  position: absolute;
  z-index: 3;
  top: calc(50% - 4px);
  left: calc(100% + ((100% - clamp(80px, 6vw, 96px)) + 28px));
  width: 8px;
  height: 8px;
  border-top: 1px solid var(--ink);
  border-right: 1px solid var(--ink);
  content: "";
  transform: rotate(45deg);
}

.human-nodes::before,
.ai-nodes::before {
  position: absolute;
  top: 50%;
  left: -42px;
  width: 42px;
  height: 1px;
  background: var(--ink);
  content: "";
}

.human-nodes::after,
.ai-nodes::after {
  position: absolute;
  top: calc(50% - 4px);
  left: 100%;
  height: 9px;
  background: var(--ink);
  clip-path: polygon(0 44%, calc(100% - 9px) 44%, calc(100% - 9px) 0, 100% 50%, calc(100% - 9px) 100%, calc(100% - 9px) 56%, 0 56%);
  content: "";
}

.human-nodes::after {
  width: clamp(190px, 19vw, 330px);
}

.ai-nodes::after {
  width: 42px;
}

.ai-nodes {
  padding-bottom: 36px;
}

.ai-loop {
  position: absolute;
  top: calc(100% + 16px);
  right: 50%;
  width: clamp(560px, 54vw, 860px);
  height: 62px;
  overflow: visible;
  fill: none;
  stroke: var(--ink);
  stroke-linecap: square;
  stroke-linejoin: miter;
  stroke-width: 1.2;
  vector-effect: non-scaling-stroke;
}

.verification-gate {
  display: grid;
  grid-column: 3;
  grid-row: 1 / 3;
  place-items: center;
  align-self: stretch;
  min-height: 290px;
  border: 2px solid var(--oxide);
  color: var(--oxide);
  font-size: clamp(26px, 2.1vw, 35px);
  font-weight: 700;
  letter-spacing: 0.12em;
}

.method-closing {
  margin: clamp(72px, 9vh, 96px) 0 0;
  padding: 34px 18px 46px;
  border-top: 1px solid var(--rule);
  font-size: 18px;
  line-height: 1.5;
  letter-spacing: 0.08em;
}

.contact {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: calc(100svh - var(--header-height));
  padding: 68px var(--page-gutter) 74px;
}

.contact-name-row {
  display: grid;
  grid-template-columns: auto minmax(90px, 1fr) auto;
  align-items: center;
  width: 100%;
}

.contact-name-row h2 {
  margin: 0;
  color: var(--bone);
  font-family: var(--display-latin);
  font-size: clamp(160px, 15.2vw, 254px);
  font-stretch: condensed;
  font-weight: 900;
  line-height: 0.82;
  letter-spacing: -0.055em;
}

.contact-line {
  position: relative;
  display: block;
  height: 2px;
  margin: 0 34px 0 8px;
  background: var(--oxide);
}

.contact-line i {
  position: absolute;
  top: 50%;
  right: 0;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--oxide);
  transform: translate(50%, -50%);
}

.contact-name-row strong {
  font-size: clamp(44px, 4vw, 68px);
  line-height: 1;
  white-space: nowrap;
}

.contact-details {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(300px, 0.72fr);
  align-items: end;
  gap: 72px;
  margin-top: clamp(90px, 13vh, 132px);
  padding: 0 40px;
}

.contact-role h3 {
  margin: 0;
  padding-left: 30px;
  border-left: 3px solid var(--oxide);
  color: var(--bone);
  font-size: clamp(30px, 2.5vw, 42px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.06em;
}

.contact-role p {
  margin: 44px 0 0;
  color: rgb(242 240 233 / 62%);
  font-size: clamp(18px, 1.45vw, 24px);
  line-height: 1.6;
  letter-spacing: 0.1em;
}

.contact-action {
  justify-self: end;
  width: min(100%, 360px);
}

.contact-action > p {
  display: flex;
  align-items: center;
  gap: 18px;
  margin: 0 0 26px;
  color: rgb(242 240 233 / 72%);
  font-family: var(--display-latin);
  font-size: 20px;
  font-stretch: condensed;
  line-height: 1;
  letter-spacing: 0.04em;
}

.contact-action > p span {
  color: var(--bone);
  font-size: 27px;
}

.contact-button {
  width: 100%;
  min-width: 0;
}

@media (min-width: 761px) and (max-width: 1350px) {
  .proof-rail {
    grid-template-columns: 0.92fr 1.16fr 1.12fr;
  }

  .proof-rail li {
    gap: 8px;
    padding: 0 10px;
    font-size: 12.5px;
    letter-spacing: -0.01em;
  }

  .proof-rail svg {
    flex-basis: 20px;
    width: 20px;
    height: 20px;
  }
}

@media (max-width: 1100px) {
  :root {
    --header-height: 88px;
  }

  .hero {
    grid-template-columns: minmax(0, 46%) minmax(0, 54%);
  }

  .hero-copy-body h1 {
    font-size: clamp(40px, 4.3vw, 52px);
  }

  .hero-copy-body p {
    font-size: 18px;
  }

  .proof-rail {
    grid-template-columns: 1fr;
    gap: 12px;
    padding-top: 22px;
  }

  .proof-rail li,
  .proof-rail li:first-child,
  .proof-rail li:last-child {
    padding: 0;
    border: 0;
  }

  .lab-main {
    grid-template-columns: minmax(220px, 24%) minmax(0, 1fr);
    min-height: 560px;
  }

  .lab-rail h2 {
    font-size: clamp(48px, 5.2vw, 62px);
  }

  .lab-facts {
    grid-template-columns: 1fr 1.5fr;
    padding: 22px 0;
  }

  .button-outline-dark {
    grid-column: 1 / -1;
    justify-self: end;
  }

  .knowledge-flow {
    gap: 28px;
  }

  .knowledge-stage h3 {
    font-size: 14px;
  }

  .source-book,
  .stage-diagram,
  .review-gate {
    height: 220px;
  }

  .knowledge-footer li {
    gap: 12px;
    padding: 0 18px;
    font-size: 14px;
  }

  .classroom-main {
    grid-template-columns: 52% 48%;
  }

  .classroom-count {
    font-size: clamp(260px, 32vw, 360px);
  }

  .classroom-copy {
    padding-left: 20px;
  }

  .method-map {
    grid-template-columns: 140px minmax(0, 1fr) 110px;
    column-gap: 26px;
  }

  .method-role strong {
    font-size: 32px;
  }

  .method-role span {
    font-size: 14px;
  }

  .method-nodes li {
    width: 70px;
    height: 70px;
    font-size: 14px;
  }

  .contact-name-row h2 {
    font-size: clamp(140px, 15vw, 180px);
  }

  .contact-details {
    padding: 0 16px;
  }
}

@media (max-width: 760px) {
  :root {
    --header-height: 131px;
  }

  .site-header {
    grid-template-columns: 1fr auto;
    min-height: 76px;
    padding-top: 17px;
    padding-bottom: 14px;
  }

  .wordmark {
    font-size: 25px;
  }

  .header-contact {
    min-height: 42px;
    padding: 0 15px;
    gap: 12px;
    font-size: 14px;
  }

  .header-contact svg {
    width: 17px;
    height: 17px;
  }

  .primary-nav {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-content: space-between;
    width: 100%;
    gap: 0;
    margin-top: 14px;
    padding-top: 12px;
    border-top: 1px solid var(--rule);
  }

  .nav-link {
    min-height: 30px;
    padding: 0 2px;
    font-size: 13px;
  }

  .nav-link::after {
    bottom: -1px;
    height: 2px;
  }

  .nav-link:hover::after,
  .nav-link.is-active::after {
    width: 38px;
  }

  .hero {
    display: flex;
    flex-direction: column;
    min-height: auto;
  }

  .hero-copy {
    padding: 46px var(--page-gutter) 34px;
    border-right: 0;
  }

  .hero-signal {
    height: 74px;
    margin-bottom: 20px;
  }

  .hero-copy-body h1 {
    font-size: clamp(39px, 11vw, 48px);
    line-height: 1.12;
    white-space: normal;
  }

  .hero-copy-body p {
    margin-top: 18px;
    font-size: 17px;
    line-height: 1.65;
  }

  .button {
    min-height: 50px;
    padding: 0 22px;
    font-size: 16px;
  }

  .button-solid {
    margin-top: 28px;
  }

  .proof-rail {
    grid-template-columns: 1fr;
    gap: 14px;
    margin-top: 44px;
  }

  .proof-rail li {
    font-size: 15px;
  }

  .hero-media {
    order: 2;
    width: calc(100% - (2 * var(--page-gutter)));
    margin: 0 auto 28px;
    border-radius: 2px;
    box-shadow: none;
  }

  section[id] {
    scroll-margin-top: 126px;
  }

  .vehicle-lab {
    min-height: auto;
    padding-top: 32px;
  }

  .lab-main {
    display: block;
    min-height: 0;
  }

  .vehicle-lab {
    min-height: calc(100svh - var(--header-height));
  }

  .lab-rail {
    padding: 0 0 30px;
  }

  .case-label {
    font-size: 17px;
  }

  .case-rule {
    width: 44px;
    margin-top: 13px;
  }

  .lab-rail h2 {
    margin-top: 24px;
    font-size: 48px;
    line-height: 0.95;
  }

  .lab-rail h2 br {
    display: none;
  }

  .lab-kicker {
    margin-top: 18px;
    font-size: 17px;
  }

  .wheel-response {
    gap: 14px;
    margin-top: 25px;
    font-size: 15px;
  }

  .wheel-axis {
    width: 86px;
    height: 2px;
    margin-left: 6px;
  }

  .wheel-axis::before,
  .wheel-axis::after {
    top: 50%;
  }

  .wheel-axis::after {
    left: 100%;
  }

  .lab-frame iframe {
    display: none;
  }

  .lab-facts {
    grid-template-columns: 1fr;
    gap: 19px;
    padding: 30px 0 34px;
  }

  .lab-fact-name {
    gap: 18px;
  }

  .lab-fact-name > span {
    height: 34px;
  }

  .lab-facts p {
    font-size: 15px;
    letter-spacing: 0.04em;
  }

  .button-outline-dark {
    grid-column: auto;
    justify-self: stretch;
    min-width: 0;
  }

  .knowledge {
    min-height: auto;
    padding-top: 44px;
  }

  .knowledge-header .case-label {
    font-size: 17px;
  }

  .knowledge-header h2 {
    margin-top: 20px;
    font-size: 42px;
    line-height: 1.15;
  }

  .knowledge-title-rule {
    width: 48px;
    height: 3px;
    margin-top: 20px;
  }

  .knowledge-header > p:last-child {
    margin-top: 15px;
    font-size: 16px;
    letter-spacing: 0.03em;
  }

  .knowledge-flow {
    grid-template-columns: 1fr;
    gap: 52px;
    margin-top: 42px;
  }

  .knowledge-stage {
    display: grid;
    grid-template-columns: 104px minmax(0, 1fr);
    align-items: center;
    gap: 20px;
  }

  .knowledge-stage h3 {
    margin: 0;
    text-align: left;
    font-size: 13px;
  }

  .knowledge-stage:not(:last-child)::after {
    top: auto;
    right: auto;
    bottom: -37px;
    left: 50px;
    width: 1px;
    height: 23px;
    border-top: 0;
    background: var(--ink);
  }

  .knowledge-stage:not(:last-child)::before {
    top: auto;
    right: auto;
    bottom: -38px;
    left: 46px;
    transform: rotate(135deg);
  }

  .source-book {
    width: 160px;
    height: 210px;
    margin-left: 0;
  }

  .source-book span {
    font-size: 42px;
  }

  .stage-diagram,
  .review-gate {
    width: min(100%, 240px);
    height: 210px;
  }

  .stage-answer {
    display: block;
  }

  .stage-answer h3 {
    margin-bottom: 54px;
  }

  .cited-answer {
    height: 112px;
    margin-top: 0;
  }

  .cited-answer > div {
    padding: 12px;
  }

  .knowledge-footer {
    grid-template-columns: 1fr;
    gap: 0;
    margin-top: 48px;
    padding: 24px 0 30px;
  }

  .knowledge-footer ul {
    grid-template-columns: 1fr;
  }

  .knowledge-footer li,
  .knowledge-footer li:first-child {
    min-height: 43px;
    padding: 0;
    border-right: 0;
  }

  .knowledge-link {
    justify-content: space-between;
    margin-top: 18px;
    padding: 18px 0 0;
    border-top: 1px solid var(--rule);
  }

  .classroom {
    min-height: auto;
    padding-top: 58px;
    overflow: hidden;
  }

  .classroom-main {
    grid-template-columns: 1fr;
    gap: 50px;
    min-height: 0;
  }

  .classroom-count {
    font-size: clamp(230px, 68vw, 300px);
    line-height: 0.75;
  }

  .classroom-copy {
    justify-self: stretch;
    padding-left: 0;
  }

  .classroom-copy h2 {
    font-size: 44px;
  }

  .classroom-copy p {
    margin-top: 17px;
    font-size: 17px;
  }

  .button-outline-ink {
    width: 100%;
    margin-top: 30px;
  }

  .episode-index {
    width: 100%;
    max-width: 100%;
    margin-top: 62px;
    overflow-x: auto;
    overscroll-behavior-inline: contain;
    padding-bottom: 10px;
    scrollbar-width: thin;
  }

  .episode-index > p {
    position: sticky;
    left: 0;
    margin-bottom: 26px;
    font-size: 17px;
  }

  .episode-track {
    min-width: 1040px;
    padding-right: var(--page-gutter);
  }

  .method {
    min-height: auto;
    padding-top: 56px;
  }

  .method-header > p {
    font-size: 18px;
  }

  .method-header h2 {
    margin-top: 24px;
    font-size: 42px;
    line-height: 1.2;
  }

  .method-map {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
    gap: 24px;
    margin-top: 54px;
  }

  .method-role {
    gap: 8px;
  }

  .method-role strong {
    font-size: 32px;
  }

  .method-role span {
    font-size: 15px;
  }

  .method-nodes,
  .human-nodes,
  .ai-nodes {
    grid-template-columns: 1fr;
    gap: 28px;
    max-width: none;
    padding: 0 0 0 20px;
  }

  .method-nodes li {
    justify-self: stretch;
    width: 100%;
    height: 62px;
  }

  .method-nodes li:not(:last-child)::after {
    top: 100%;
    left: 50%;
    width: 1px;
    height: 28px;
  }

  .method-nodes li:not(:last-child)::before {
    top: calc(100% + 18px);
    left: calc(50% - 4px);
    transform: rotate(135deg);
  }

  .human-nodes::before,
  .human-nodes::after,
  .ai-nodes::before,
  .ai-nodes::after,
  .ai-loop {
    display: none;
  }

  .ai-role {
    margin-top: 26px;
  }

  .verification-gate {
    grid-column: 1;
    grid-row: auto;
    min-height: 96px;
    margin: 28px 0 0 20px;
  }

  .method-closing {
    margin-top: 60px;
    padding-right: 0;
    padding-left: 0;
    font-size: 16px;
  }

  .contact {
    min-height: calc(100svh - var(--header-height));
    padding-top: 72px;
    padding-bottom: 64px;
  }

  .contact-name-row {
    grid-template-columns: 1fr;
    gap: 22px;
  }

  .contact-name-row h2 {
    font-size: clamp(68px, 20vw, 84px);
    line-height: 0.9;
  }

  .contact-line {
    width: 75%;
    margin: 0;
  }

  .contact-name-row strong {
    font-size: 38px;
  }

  .contact-details {
    grid-template-columns: 1fr;
    gap: 58px;
    margin-top: 76px;
    padding: 0;
  }

  .contact-role h3 {
    padding-left: 18px;
    font-size: 28px;
  }

  .contact-role p {
    margin-top: 28px;
    font-size: 16px;
    letter-spacing: 0.05em;
  }

  .contact-action {
    justify-self: stretch;
    width: 100%;
  }

  .contact-action > p {
    font-size: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}