:root {
  --cai-aqua: #47d8d7;
  --cai-aqua-soft: #a7f2ef;
  --cai-ink: #070a0d;
  --cai-panel: #0d1216;
  --cai-panel-2: #12191e;
  --cai-line: #26343b;
  --cai-paper: #edf7f6;
  --cai-muted: #98a9af;
  --cai-violet: #8f72ff;
  --cai-max: 1240px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  color: var(--cai-paper);
  background: var(--cai-ink);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  line-height: 1.7;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background-image: linear-gradient(rgba(71, 216, 215, 0.032) 1px, transparent 1px), linear-gradient(90deg, rgba(71, 216, 215, 0.028) 1px, transparent 1px);
  background-size: 52px 52px;
}

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

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

button,
input,
summary {
  font: inherit;
}

img {
  display: block;
  max-width: 100%;
}

:focus-visible {
  outline: 3px solid var(--cai-aqua);
  outline-offset: 4px;
}

.cai-masthead {
  position: sticky;
  top: 0;
  z-index: 100;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  min-height: 74px;
  padding: 10px max(24px, calc((100vw - var(--cai-max)) / 2));
  border-bottom: 1px solid rgba(71, 216, 215, 0.18);
  background: rgba(7, 10, 13, 0.94);
  backdrop-filter: blur(14px);
}

.cai-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 800;
}

.cai-brand img {
  width: 46px;
  height: 46px;
  object-fit: contain;
}

.cai-nav {
  justify-self: center;
  display: flex;
  align-items: center;
  gap: clamp(16px, 2.2vw, 32px);
  color: #bdc9cd;
  font-size: 14px;
}

.cai-nav a,
.cai-home-control {
  position: relative;
  padding: 9px 0;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

.cai-nav a::after,
.cai-home-control::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 3px;
  left: 0;
  height: 2px;
  background: var(--cai-aqua);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms ease;
}

.cai-nav a:hover,
.cai-home-control:hover {
  color: #fff;
}

.cai-nav a:hover::after,
.cai-home-control:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.cai-header-action {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 42px;
  padding: 9px 16px;
  color: #021011;
  background: var(--cai-aqua);
  border: 1px solid var(--cai-aqua);
  font-size: 14px;
  font-weight: 800;
  transition: background 160ms ease, color 160ms ease;
}

.cai-header-action:hover {
  color: var(--cai-aqua);
  background: transparent;
}

.cai-menu-toggle {
  display: none;
}

.cai-opening {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: clamp(36px, 6vw, 92px);
  width: min(calc(100% - 48px), var(--cai-max));
  min-height: 680px;
  margin: 0 auto;
  padding: 76px 0 64px;
  border-bottom: 1px solid var(--cai-line);
}

.cai-opening::after {
  content: "CHARACTERS / STORIES / VOICES";
  position: absolute;
  right: -160px;
  bottom: 90px;
  color: rgba(71, 216, 215, 0.13);
  font-size: 11px;
  letter-spacing: 0.32em;
  transform: rotate(90deg);
}

.cai-opening-copy {
  align-self: center;
  padding-bottom: 50px;
}

.cai-signal,
.cai-kicker {
  margin: 0 0 20px;
  color: var(--cai-aqua);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.cai-signal {
  display: flex;
  align-items: center;
  gap: 12px;
}

.cai-signal span {
  width: 44px;
  height: 1px;
  background: var(--cai-aqua);
}

.cai-opening h1 {
  max-width: 720px;
  margin: 0;
  color: #fff;
  font-size: clamp(50px, 5vw, 64px);
  line-height: 0.98;
  letter-spacing: -0.055em;
}

.cai-opening-tagline {
  max-width: 760px;
  margin: 22px 0 14px;
  color: #e6ffff;
  font-size: clamp(24px, 3vw, 38px);
  font-weight: 800;
  line-height: 1.32;
}

.cai-opening-intro {
  max-width: 640px;
  margin: 0;
  color: #aab8bd;
  font-size: 16px;
}

.cai-opening-actions {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-top: 30px;
}

.cai-pulse-button {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  min-width: 208px;
  min-height: 54px;
  padding: 12px 18px 12px 22px;
  color: #021314;
  background: var(--cai-aqua);
  border: 1px solid var(--cai-aqua);
  font-weight: 800;
}

.cai-pulse-button i {
  font-size: 20px;
  transition: transform 180ms ease;
}

.cai-pulse-button:hover i {
  transform: translateX(4px);
}

.cai-text-link {
  color: #c4d1d4;
  font-size: 14px;
}

.cai-text-link:hover {
  color: var(--cai-aqua-soft);
}

.cai-capability-line {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 40px 0 0;
  padding: 0;
  list-style: none;
}

.cai-capability-line li {
  padding: 6px 11px;
  color: #9eafb4;
  border: 1px solid #27343a;
  border-radius: 999px;
  font-size: 12px;
}

.cai-conversation-cut {
  position: relative;
  align-self: center;
  justify-self: end;
  width: min(100%, 390px);
  margin: 0;
  padding: 0 18px 18px 0;
}

.cai-conversation-cut::before {
  content: "";
  position: absolute;
  top: 54px;
  right: 0;
  bottom: 0;
  left: 36px;
  z-index: -1;
  border: 1px solid rgba(71, 216, 215, 0.54);
  background: #0b1115;
}

.cai-conversation-cut img {
  width: 333px;
  height: auto;
  margin-left: auto;
  border: 1px solid #2b3940;
}

.cai-cut-label {
  position: absolute;
  top: 24px;
  left: -50px;
  z-index: 2;
  display: flex;
  flex-direction: column;
  width: 146px;
  padding: 14px 16px;
  color: #081114;
  background: var(--cai-aqua);
  box-shadow: 10px 10px 0 #081114, 11px 11px 0 var(--cai-aqua);
}

.cai-cut-label span {
  font-size: 11px;
}

.cai-cut-label strong {
  font-size: 19px;
}

.cai-conversation-cut figcaption {
  position: absolute;
  right: -22px;
  bottom: 48px;
  display: grid;
  gap: 8px;
  width: 184px;
  padding: 14px;
  background: #f1fbfa;
  color: #11191c;
  border: 1px solid #fff;
  font-size: 12px;
  font-weight: 700;
}

.cai-conversation-cut figcaption span {
  display: flex;
  align-items: center;
  gap: 8px;
}

.cai-conversation-cut figcaption i {
  color: #0b8f91;
  font-size: 16px;
}

.cai-opening-note {
  position: absolute;
  bottom: 0;
  left: 0;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
  max-width: 520px;
  padding: 18px 22px 18px 0;
  border-top: 1px solid var(--cai-line);
}

.cai-opening-note span {
  color: var(--cai-aqua);
  font: 700 12px/1 monospace;
}

.cai-opening-note p {
  margin: -5px 0 0;
  color: #87979d;
  font-size: 13px;
}

.cai-cast-index {
  display: grid;
  grid-template-columns: minmax(250px, 0.7fr) minmax(340px, 1.1fr) 280px;
  gap: clamp(28px, 5vw, 76px);
  width: min(calc(100% - 48px), var(--cai-max));
  margin: 0 auto;
  padding: 70px 0;
}

.cai-cast-index > header p {
  margin: 0 0 12px;
  color: var(--cai-aqua);
  font-size: 13px;
  font-weight: 700;
}

.cai-cast-index h2,
.cai-story-heading h2,
.cai-stage-copy h2,
.cai-maker-manifesto h2,
.cai-use-map h2,
.cai-voices h2,
.cai-questions h2,
.cai-final-call h2 {
  margin: 0;
  font-size: clamp(28px, 3.2vw, 40px);
  line-height: 1.28;
}

.cai-cast-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.cai-cast-list li {
  display: grid;
  grid-template-columns: 34px minmax(110px, 0.8fr) 1fr;
  gap: 14px;
  align-items: center;
  padding: 17px 0;
  border-bottom: 1px solid var(--cai-line);
}

.cai-cast-list li:first-child {
  border-top: 1px solid var(--cai-line);
}

.cai-cast-list span {
  color: var(--cai-aqua);
  font: 700 11px/1 monospace;
}

.cai-cast-list strong {
  font-size: 15px;
}

.cai-cast-list em {
  color: var(--cai-muted);
  font-size: 13px;
  font-style: normal;
}

.cai-cast-poster {
  margin: -20px 0 0;
  padding: 10px;
  color: #081114;
  background: var(--cai-aqua);
  transform: rotate(1.5deg);
}

.cai-cast-poster img {
  width: 100%;
  height: auto;
}

.cai-cast-poster figcaption {
  padding: 12px 4px 4px;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.5;
}

.cai-story-board {
  padding: 58px max(24px, calc((100vw - var(--cai-max)) / 2)) 66px;
  overflow: hidden;
  background: #edf7f6;
  color: #11191c;
}

.cai-story-heading {
  display: grid;
  grid-template-columns: 0.35fr 1fr 0.7fr;
  gap: 34px;
  align-items: start;
  margin-bottom: 40px;
}

.cai-story-heading > span {
  color: #0f898c;
  font-size: 13px;
  font-weight: 800;
}

.cai-story-heading p {
  margin: 0;
  color: #566368;
  font-size: 14px;
}

.cai-story-reel {
  display: grid;
  grid-template-columns: repeat(4, minmax(210px, 1fr));
  gap: 16px;
}

.cai-frame {
  position: relative;
  margin: 0;
  background: #071013;
  border: 1px solid #14282b;
}

.cai-frame img {
  width: 100%;
  height: auto;
}

.cai-frame figcaption {
  display: grid;
  gap: 3px;
  padding: 13px 14px 15px;
  color: #e4eeee;
}

.cai-frame figcaption b {
  color: var(--cai-aqua);
  font-size: 15px;
}

.cai-frame figcaption span {
  color: #94a6aa;
  font-size: 12px;
}

.cai-frame-talk {
  transform: translateY(22px);
}

.cai-frame-create {
  transform: translateY(-10px);
}

.cai-frame-story {
  transform: translateY(12px);
}

.cai-swipe-hint {
  display: none;
}

.cai-dialogue-stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.66fr);
  gap: clamp(46px, 8vw, 120px);
  width: min(calc(100% - 48px), 1120px);
  margin: 0 auto;
  padding: 76px 0 58px;
}

.cai-stage-copy > p:not(.cai-kicker) {
  max-width: 650px;
  margin: 18px 0 0;
  color: var(--cai-muted);
}

.cai-dialogue-facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 30px;
  margin: 32px 0 0;
}

.cai-dialogue-facts div {
  padding: 18px 0;
  border-top: 1px solid var(--cai-line);
}

.cai-dialogue-facts dt {
  color: #dffefd;
  font-weight: 800;
}

.cai-dialogue-facts dt i {
  margin-right: 7px;
  color: var(--cai-aqua);
}

.cai-dialogue-facts dd {
  margin: 7px 0 0;
  color: #8fa0a5;
  font-size: 13px;
}

.cai-stage-visual {
  align-self: center;
  margin: 0;
  border-left: 8px solid var(--cai-aqua);
  background: #141a20;
}

.cai-stage-visual img {
  width: 100%;
  height: auto;
}

.cai-stage-visual figcaption {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 12px;
}

.cai-stage-visual figcaption span {
  padding: 4px 9px;
  border: 1px solid #354249;
  border-radius: 999px;
  color: #b8c4c8;
  font-size: 11px;
}

.cai-creation-desk {
  display: grid;
  grid-template-columns: minmax(300px, 0.78fr) minmax(0, 1.22fr);
  width: min(calc(100% - 48px), var(--cai-max));
  margin: 24px auto 0;
  border-top: 1px solid var(--cai-line);
  border-bottom: 1px solid var(--cai-line);
}

.cai-maker-view {
  position: relative;
  margin: 0;
  padding: 44px clamp(22px, 4vw, 56px);
  background: var(--cai-aqua);
}

.cai-maker-view img {
  width: min(100%, 380px);
  height: auto;
  margin: 0 auto;
  box-shadow: 20px 20px 0 rgba(0, 0, 0, 0.12);
}

.cai-maker-number {
  position: absolute;
  top: 20px;
  left: 0;
  padding: 7px 11px;
  color: #fff;
  background: #0a1013;
  font: 700 11px/1 monospace;
}

.cai-maker-manifesto {
  align-self: center;
  padding: 50px clamp(24px, 6vw, 84px);
}

.cai-maker-manifesto > p:not(.cai-kicker):not(.cai-maker-tip) {
  margin: 18px 0 0;
  color: var(--cai-muted);
}

.cai-definition-flow {
  margin: 28px 0 0;
  padding: 0;
  counter-reset: maker;
  list-style: none;
}

.cai-definition-flow li {
  display: grid;
  grid-template-columns: 82px 1fr;
  gap: 20px;
  padding: 15px 0;
  border-top: 1px solid var(--cai-line);
}

.cai-definition-flow b {
  color: var(--cai-aqua);
}

.cai-definition-flow span {
  color: #a2b0b5;
  font-size: 14px;
}

.cai-maker-tip {
  display: flex;
  gap: 10px;
  margin: 24px 0 0;
  padding: 14px 16px;
  color: #cde0e1;
  border: 1px dashed #3a5058;
  font-size: 13px;
}

.cai-maker-tip i {
  color: var(--cai-aqua);
  font-size: 19px;
}

.cai-use-map {
  width: min(calc(100% - 48px), 1120px);
  margin: 0 auto;
  padding: 66px 0 72px;
}

.cai-use-map > header {
  display: grid;
  grid-template-columns: 1fr 0.8fr;
  gap: 60px;
  align-items: end;
  margin-bottom: 30px;
}

.cai-use-map > header p {
  margin: 0;
  color: var(--cai-muted);
}

.cai-use-paths {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--cai-line);
  border-bottom: 1px solid var(--cai-line);
}

.cai-use-paths article {
  padding: 24px 20px 26px;
  border-right: 1px solid var(--cai-line);
}

.cai-use-paths article:last-child {
  border-right: 0;
}

.cai-use-paths span {
  display: inline-block;
  margin-bottom: 30px;
  padding: 3px 9px;
  color: #051112;
  background: var(--cai-aqua);
  font-size: 11px;
  font-weight: 800;
}

.cai-use-paths h3 {
  margin: 0 0 10px;
  font-size: 18px;
}

.cai-use-paths p {
  margin: 0;
  color: #8ea0a6;
  font-size: 13px;
}

.cai-voices {
  display: grid;
  grid-template-columns: 0.8fr 1fr 1fr;
  gap: 16px;
  padding: 64px max(24px, calc((100vw - var(--cai-max)) / 2));
  color: #11191c;
  background: var(--cai-aqua);
}

.cai-voices-lead {
  padding: 8px clamp(12px, 3vw, 36px) 0 0;
}

.cai-voices-lead > span {
  color: #126b6d;
  font-size: 13px;
  font-weight: 800;
}

.cai-voices-lead h2 {
  margin-top: 14px;
}

.cai-voices-lead p {
  color: #27595b;
  font-size: 14px;
}

.cai-quote-column {
  display: grid;
  gap: 16px;
}

.cai-quote-column-shift {
  padding-top: 34px;
}

.cai-voice {
  padding: 19px 20px;
  background: #eaf9f8;
  border: 1px solid #88dedd;
}

.cai-voice p {
  margin: 0 0 12px;
  line-height: 1.8;
}

.cai-voice span {
  color: #397173;
  font-size: 12px;
}

.cai-voice-accent {
  color: #f4ffff;
  background: #0c1518;
  border-color: #0c1518;
}

.cai-voice-accent span {
  color: #8edbdc;
}

.cai-voice-outline {
  background: transparent;
  border: 2px solid #0b5254;
}

.cai-questions {
  display: grid;
  grid-template-columns: 0.65fr 1.35fr;
  gap: clamp(44px, 8vw, 110px);
  width: min(calc(100% - 48px), 1120px);
  margin: 0 auto;
  padding: 72px 0;
}

.cai-questions aside {
  align-self: start;
  position: sticky;
  top: 110px;
}

.cai-questions aside > p:not(.cai-kicker) {
  color: var(--cai-muted);
}

.cai-questions aside > a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 18px;
  color: var(--cai-aqua);
  font-weight: 800;
}

.cai-question-stack {
  border-top: 1px solid var(--cai-line);
}

.cai-question-stack details {
  border-bottom: 1px solid var(--cai-line);
}

.cai-question-stack summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 20px 0;
  cursor: pointer;
  color: #dce8e9;
  font-weight: 800;
  list-style: none;
}

.cai-question-stack summary::-webkit-details-marker {
  display: none;
}

.cai-question-stack summary i {
  flex: 0 0 auto;
  color: var(--cai-aqua);
  font-size: 21px;
  transition: transform 180ms ease;
}

.cai-question-stack details[open] summary i {
  transform: rotate(45deg);
}

.cai-question-stack details p {
  margin: -4px 36px 20px 0;
  color: #90a1a6;
  font-size: 14px;
}

.cai-final-call {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 30px;
  align-items: center;
  width: min(calc(100% - 48px), var(--cai-max));
  margin: 0 auto 56px;
  padding: 42px 46px;
  color: #071113;
  background: #eaf9f8;
  border-left: 12px solid var(--cai-aqua);
}

.cai-final-mark {
  font-size: clamp(36px, 5vw, 68px);
  font-weight: 900;
  letter-spacing: -0.06em;
}

.cai-final-call p {
  margin: 0 0 4px;
  color: #327173;
  font-size: 13px;
  font-weight: 800;
}

.cai-final-call h2 {
  font-size: clamp(24px, 3vw, 34px);
}

.cai-final-call > a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 50px;
  padding: 11px 18px;
  color: #eaffff;
  background: #081214;
  font-size: 14px;
  font-weight: 800;
  white-space: nowrap;
}

.cai-footer {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px 50px;
  align-items: center;
  padding: 34px max(24px, calc((100vw - var(--cai-max)) / 2));
  border-top: 1px solid var(--cai-line);
  background: #050708;
}

.cai-footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.cai-footer-brand img {
  width: 52px;
  height: 52px;
  object-fit: contain;
}

.cai-footer-brand div {
  display: grid;
}

.cai-footer-brand span {
  color: #75868b;
  font-size: 12px;
}

.cai-footer nav {
  display: flex;
  gap: 22px;
  color: #a0adb1;
  font-size: 13px;
}

.cai-footer nav a:hover {
  color: var(--cai-aqua);
}

.cai-footer > p {
  grid-column: 1 / -1;
  margin: 0;
  padding-top: 18px;
  color: #65767c;
  border-top: 1px solid #192226;
  font-size: 12px;
}

.cai-backtop {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 90;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  color: #061012;
  background: var(--cai-aqua);
  border: 0;
  opacity: 0;
  pointer-events: none;
  transform: translateY(14px);
  transition: opacity 180ms ease, transform 180ms ease;
  cursor: pointer;
}

.cai-backtop.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

@media (max-width: 1040px) {
  .cai-masthead {
    grid-template-columns: auto auto 1fr;
  }

  .cai-nav {
    justify-self: end;
  }

  .cai-header-action {
    display: none;
  }

  .cai-opening {
    grid-template-columns: minmax(0, 1fr) minmax(270px, 0.72fr);
    gap: 52px;
  }

  .cai-cut-label {
    left: -24px;
  }

  .cai-conversation-cut figcaption {
    right: -8px;
  }

  .cai-cast-index {
    grid-template-columns: 0.9fr 1.1fr;
  }

  .cai-cast-poster {
    grid-column: 1 / -1;
    width: 260px;
    margin: 0 0 0 auto;
  }

  .cai-story-heading {
    grid-template-columns: 0.4fr 1.1fr;
  }

  .cai-story-heading p {
    grid-column: 2;
  }

  .cai-use-paths {
    grid-template-columns: 1fr 1fr;
  }

  .cai-use-paths article:nth-child(2) {
    border-right: 0;
  }

  .cai-use-paths article:nth-child(-n+2) {
    border-bottom: 1px solid var(--cai-line);
  }

  .cai-voices {
    grid-template-columns: 0.8fr 1fr;
  }

  .cai-voices-lead {
    grid-row: 1 / span 2;
  }

  .cai-quote-column-shift {
    grid-column: 2;
    padding-top: 0;
  }
}

@media (max-width: 820px) {
  html {
    scroll-padding-top: 74px;
  }

  .cai-masthead {
    grid-template-columns: 1fr auto;
    min-height: 68px;
    padding: 8px 20px;
  }

  .cai-menu-toggle {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    min-height: 42px;
    padding: 8px 11px;
    color: #d9e6e7;
    background: transparent;
    border: 1px solid #304047;
    cursor: pointer;
  }

  .cai-nav {
    position: absolute;
    top: 100%;
    right: 16px;
    left: 16px;
    display: none;
    align-items: stretch;
    padding: 10px 18px 16px;
    background: #0a0f12;
    border: 1px solid #2f4249;
  }

  .cai-nav.is-open {
    display: grid;
  }

  .cai-nav a,
  .cai-home-control {
    min-height: 44px;
    padding: 10px 0;
    text-align: left;
    border-bottom: 1px solid #1c292f;
  }

  .cai-nav a::after,
  .cai-home-control::after {
    display: none;
  }

  .cai-opening {
    grid-template-columns: 1fr;
    gap: 34px;
    width: min(calc(100% - 36px), 680px);
    min-height: 0;
    padding: 52px 0 86px;
  }

  .cai-opening::after {
    display: none;
  }

  .cai-opening-copy {
    padding-bottom: 0;
  }

  .cai-opening h1 {
    font-size: clamp(44px, 8vw, 58px);
  }

  .cai-opening-tagline {
    font-size: clamp(25px, 7vw, 34px);
  }

  .cai-conversation-cut {
    justify-self: center;
    width: min(86%, 370px);
    padding-right: 12px;
  }

  .cai-cut-label {
    left: -34px;
  }

  .cai-conversation-cut figcaption {
    right: -32px;
  }

  .cai-opening-note {
    right: 0;
    padding-right: 0;
  }

  .cai-cast-index {
    grid-template-columns: 1fr;
    width: min(calc(100% - 36px), 680px);
    padding: 52px 0;
  }

  .cai-cast-poster {
    grid-column: auto;
    width: min(74%, 330px);
  }

  .cai-story-board {
    padding: 46px 18px 52px;
  }

  .cai-story-heading {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .cai-story-heading p {
    grid-column: auto;
  }

  .cai-story-reel {
    display: flex;
    gap: 14px;
    padding: 4px 0 18px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scrollbar-color: #0d7577 transparent;
  }

  .cai-frame {
    flex: 0 0 min(78vw, 300px);
    scroll-snap-align: start;
    transform: none;
  }

  .cai-swipe-hint {
    display: block;
    margin: 4px 0 0;
    color: #486266;
    font-size: 12px;
  }

  .cai-dialogue-stage {
    grid-template-columns: 1fr;
    width: min(calc(100% - 36px), 680px);
    padding: 54px 0;
  }

  .cai-stage-visual {
    width: min(78%, 390px);
    margin-left: auto;
  }

  .cai-creation-desk {
    grid-template-columns: 0.82fr 1.18fr;
    width: calc(100% - 36px);
  }

  .cai-maker-view {
    padding: 34px 18px;
  }

  .cai-maker-manifesto {
    padding: 36px 24px;
  }

  .cai-definition-flow li {
    grid-template-columns: 62px 1fr;
  }

  .cai-use-map {
    width: calc(100% - 36px);
    padding: 50px 0 56px;
  }

  .cai-use-map > header {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .cai-voices {
    grid-template-columns: 1fr 1fr;
    padding: 48px 18px;
  }

  .cai-voices-lead {
    grid-column: 1 / -1;
    grid-row: auto;
    padding-bottom: 10px;
  }

  .cai-quote-column-shift {
    grid-column: auto;
  }

  .cai-questions {
    grid-template-columns: 1fr;
    width: min(calc(100% - 36px), 680px);
    padding: 54px 0;
  }

  .cai-questions aside {
    position: static;
  }

  .cai-final-call {
    grid-template-columns: auto 1fr;
    width: calc(100% - 36px);
    padding: 30px;
  }

  .cai-final-call > a {
    grid-column: 1 / -1;
    justify-content: center;
  }
}

@media (max-width: 580px) {
  .cai-brand img {
    width: 42px;
    height: 42px;
  }

  .cai-opening {
    padding-top: 42px;
  }

  .cai-opening h1 {
    font-size: 40px;
    letter-spacing: -0.04em;
  }

  .cai-opening-tagline {
    font-size: 25px;
  }

  .cai-opening-actions {
    align-items: stretch;
    flex-direction: column;
    gap: 14px;
  }

  .cai-pulse-button {
    width: 100%;
  }

  .cai-text-link {
    padding-left: 2px;
  }

  .cai-conversation-cut {
    width: min(82%, 320px);
    padding: 0 8px 12px 0;
  }

  .cai-cut-label {
    top: 18px;
    left: -34px;
    width: 120px;
    padding: 10px 12px;
  }

  .cai-cut-label strong {
    font-size: 16px;
  }

  .cai-conversation-cut figcaption {
    right: -34px;
    bottom: 30px;
    width: 154px;
    padding: 10px;
    font-size: 11px;
  }

  .cai-opening-note {
    max-width: 100%;
  }

  .cai-cast-index h2,
  .cai-story-heading h2,
  .cai-stage-copy h2,
  .cai-maker-manifesto h2,
  .cai-use-map h2,
  .cai-voices h2,
  .cai-questions h2 {
    font-size: 27px;
  }

  .cai-cast-list li {
    grid-template-columns: 28px 1fr;
    gap: 9px 12px;
  }

  .cai-cast-list em {
    grid-column: 2;
  }

  .cai-dialogue-facts {
    grid-template-columns: 1fr;
  }

  .cai-stage-visual {
    width: min(88%, 350px);
  }

  .cai-creation-desk {
    grid-template-columns: 1fr;
  }

  .cai-maker-view img {
    width: min(80%, 330px);
  }

  .cai-use-paths {
    grid-template-columns: 1fr;
  }

  .cai-use-paths article,
  .cai-use-paths article:nth-child(2) {
    border-right: 0;
    border-bottom: 1px solid var(--cai-line);
  }

  .cai-use-paths article:last-child {
    border-bottom: 0;
  }

  .cai-use-paths span {
    margin-bottom: 16px;
  }

  .cai-voices {
    grid-template-columns: 1fr;
  }

  .cai-quote-column-shift {
    grid-column: auto;
  }

  .cai-question-stack summary {
    align-items: flex-start;
  }

  .cai-final-call {
    grid-template-columns: 1fr;
    padding: 26px 22px;
  }

  .cai-final-mark {
    font-size: 44px;
  }

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

  .cai-footer nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px 20px;
  }

  .cai-footer > p {
    grid-column: auto;
  }

  .cai-backtop {
    right: 16px;
    bottom: 16px;
  }
}

@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;
  }
}