:root {
  --navy-950: #071b2c;
  --navy-900: #0b263c;
  --navy-800: #123b55;
  --navy-700: #1d526f;
  --ink: #102536;
  --ink-soft: #526674;
  --paper: #f4f1e9;
  --paper-warm: #ebe5d8;
  --white: #fffefa;
  --mist: #edf4f3;
  --mint: #42d6bd;
  --mint-dark: #0d8677;
  --red: #d94d46;
  --amber: #e6a652;
  --line: rgba(16, 37, 54, 0.14);
  --line-light: rgba(255, 255, 255, 0.15);
  --shadow-soft: 0 28px 80px rgba(10, 40, 58, 0.14);
  --shadow-deep: 0 30px 90px rgba(4, 17, 27, 0.35);
  --shell: min(1240px, calc(100vw - 64px));
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
}

body::selection {
  color: var(--white);
  background: var(--mint-dark);
}

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

button,
input {
  font: inherit;
}

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

button {
  border: 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 10px 14px;
  color: #fff;
  background: var(--navy-950);
  transform: translateY(-150%);
}

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

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

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: 76px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 4vw;
  color: var(--ink);
  border-bottom: 1px solid transparent;
  transition: background 240ms ease, border-color 240ms ease, box-shadow 240ms ease;
}

.site-header.is-scrolled {
  background: rgba(244, 241, 233, 0.9);
  border-color: var(--line);
  box-shadow: 0 8px 32px rgba(10, 37, 54, 0.06);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  width: max-content;
  font-weight: 700;
}

.brand-seed {
  position: relative;
  width: 29px;
  height: 29px;
  border: 8px solid var(--navy-900);
  border-radius: 50% 45% 50% 45%;
  transform: rotate(-22deg);
}

.brand-seed::after {
  content: "";
  position: absolute;
  width: 11px;
  height: 6px;
  top: -10px;
  left: 2px;
  border-radius: 100% 0 100% 0;
  background: var(--mint);
  transform: rotate(28deg);
}

.brand-name {
  font-size: 20px;
  letter-spacing: -0.04em;
}

.brand-divider {
  width: 1px;
  height: 18px;
  background: rgba(16, 37, 54, 0.22);
}

.brand-cn {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 34px;
}

.site-nav a {
  position: relative;
  font-size: 13px;
  font-weight: 600;
}

.site-nav a::after {
  content: "";
  position: absolute;
  right: 100%;
  bottom: -10px;
  left: 0;
  height: 2px;
  background: var(--mint-dark);
  transition: right 220ms ease;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  right: 0;
}

.header-cta {
  justify-self: end;
  padding: 11px 17px;
  color: var(--white);
  background: var(--navy-900);
  border-radius: 4px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 180ms ease, background 180ms ease;
}

.header-cta:hover {
  background: var(--mint-dark);
  transform: translateY(-2px);
}

.nav-toggle {
  display: none;
}

.hero {
  position: relative;
  min-height: 940px;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(520px, 1.12fr);
  align-items: center;
  gap: 3vw;
  padding: 132px max(5vw, calc((100vw - 1440px) / 2)) 106px;
  background:
    radial-gradient(circle at 75% 30%, rgba(66, 214, 189, 0.14), transparent 30%),
    linear-gradient(135deg, #f5f2ea 0%, #fbfaf6 48%, #eaf3f1 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 160px;
  background: linear-gradient(to bottom, transparent, rgba(235, 229, 216, 0.55));
  pointer-events: none;
}

.hero-orbit,
.contact-orbit {
  position: absolute;
  border: 1px solid rgba(13, 134, 119, 0.14);
  border-radius: 50%;
  pointer-events: none;
}

.hero .orbit-one {
  width: 720px;
  height: 720px;
  right: -170px;
  top: 20px;
}

.hero .orbit-two {
  width: 470px;
  height: 470px;
  right: -10px;
  top: 145px;
}

.hero-copy {
  position: relative;
  z-index: 2;
  padding-bottom: 40px;
}

.eyebrow,
.chapter-label {
  margin: 0 0 24px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--mint-dark);
}

.eyebrow span {
  width: 32px;
  height: 2px;
  background: currentColor;
}

.hero h1 {
  max-width: 650px;
  margin: 0;
  color: var(--navy-950);
  font-size: clamp(58px, 6.2vw, 104px);
  font-weight: 800;
  line-height: 0.98;
  letter-spacing: -0.075em;
}

.hero h1 em,
.chapter-heading h2 em,
.process-heading h2 em,
.contact h2 em {
  color: var(--mint-dark);
  font-style: normal;
}

.hero-lead {
  margin: 34px 0 0;
  color: var(--ink-soft);
  font-size: 18px;
  line-height: 1.9;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-top: 40px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 24px;
  border-radius: 3px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.button:hover {
  transform: translateY(-3px);
}

.button-primary {
  color: var(--white);
  background: var(--navy-900);
  box-shadow: 0 12px 30px rgba(11, 38, 60, 0.18);
}

.button-primary:hover {
  background: var(--mint-dark);
  box-shadow: 0 16px 36px rgba(13, 134, 119, 0.2);
}

.text-link {
  padding: 8px 0;
  border-bottom: 1px solid rgba(16, 37, 54, 0.35);
  font-size: 14px;
  font-weight: 600;
}

.text-link span {
  display: inline-block;
  margin-left: 8px;
  transition: transform 180ms ease;
}

.text-link:hover span {
  transform: translateY(4px);
}

.hero-manifesto {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin: 46px 0 0;
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 600;
}

.hero-manifesto span {
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-manifesto span::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--red);
}

.hero-stage {
  position: relative;
  z-index: 2;
  min-height: 620px;
}

.paper-stack {
  position: absolute;
  top: 104px;
  left: 0;
  width: 295px;
  height: 404px;
  transform: rotate(-5deg);
}

.paper-shadow {
  position: absolute;
  inset: 0;
  background: #e2ded3;
  border: 1px solid rgba(16, 37, 54, 0.1);
}

.paper-shadow-one {
  transform: translate(-14px, 12px) rotate(-4deg);
}

.paper-shadow-two {
  transform: translate(10px, 10px) rotate(3deg);
}

.policy-paper {
  position: absolute;
  inset: 0;
  padding: 33px 30px;
  background: var(--white);
  border: 1px solid rgba(16, 37, 54, 0.14);
  box-shadow: var(--shadow-soft);
}

.paper-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #77838b;
  font-size: 9px;
}

.file-type {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  color: #fff;
  background: var(--red);
  font-size: 8px;
  font-weight: 800;
}

.policy-paper h2 {
  margin: 30px 0 20px;
  font-size: 25px;
  line-height: 1.35;
  letter-spacing: -0.04em;
}

.paper-rule {
  width: 100%;
  height: 1px;
  margin-bottom: 20px;
  background: var(--line);
}

.policy-paper p {
  color: #697a85;
  font-size: 10px;
  line-height: 2;
}

.paper-highlight {
  display: flex;
  align-items: baseline;
  gap: 5px;
  margin: 24px 0;
  padding: 12px 14px;
  color: var(--navy-900);
  background: rgba(230, 166, 82, 0.18);
  border-left: 3px solid var(--amber);
  font-size: 10px;
}

.paper-highlight strong {
  color: var(--red);
  font-size: 25px;
}

.policy-paper footer {
  position: absolute;
  right: 30px;
  bottom: 22px;
  left: 30px;
  padding-top: 12px;
  color: #8f999f;
  border-top: 1px solid var(--line);
  font-size: 9px;
}

.translation-path {
  position: absolute;
  top: 245px;
  left: 286px;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 16px;
}

.translation-path::before {
  content: "";
  position: absolute;
  left: -3px;
  top: 50%;
  width: 118px;
  border-top: 1px dashed var(--mint-dark);
}

.translation-path span {
  position: relative;
  width: 8px;
  height: 8px;
  border: 2px solid var(--mint-dark);
  border-radius: 50%;
  background: var(--paper);
  animation: signal 2.4s ease-in-out infinite;
}

.translation-path span:nth-child(2) { animation-delay: 0.25s; }
.translation-path span:nth-child(3) { animation-delay: 0.5s; }
.translation-path span:nth-child(4) { animation-delay: 0.75s; }

@keyframes signal {
  0%, 65%, 100% { background: var(--paper); box-shadow: none; }
  35% { background: var(--mint); box-shadow: 0 0 0 8px rgba(66, 214, 189, 0.12); }
}

.video-card {
  position: absolute;
  top: 40px;
  right: 0;
  width: 324px;
  height: 530px;
  overflow: hidden;
  padding: 25px;
  color: #fff;
  background:
    linear-gradient(to top, rgba(5, 24, 38, 0.98) 0%, rgba(10, 46, 62, 0.35) 47%, transparent 72%),
    radial-gradient(circle at 40% 32%, #b7d7d2 0%, #5f8d8e 28%, #163d51 70%);
  border: 8px solid #fff;
  border-radius: 12px;
  box-shadow: var(--shadow-deep);
  transform: rotate(2.5deg);
}

.video-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(90deg, transparent 0 35px, rgba(255,255,255,.025) 36px);
}

.video-topline {
  position: relative;
  z-index: 3;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 10px;
}

.case-chip {
  padding: 7px 9px;
  color: var(--navy-950);
  background: var(--amber);
  border-radius: 2px;
  font-weight: 700;
}

.video-number {
  opacity: 0.7;
}

.presenter-photo {
  position: absolute;
  inset: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 55% 38%;
}

.video-card h3 {
  position: absolute;
  right: 25px;
  bottom: 66px;
  left: 25px;
  z-index: 4;
  margin: 0;
  font-size: 23px;
  line-height: 1.45;
  letter-spacing: -0.04em;
}

.video-card::after {
  content: "";
  position: absolute;
  z-index: 2;
  inset: 0;
  background: linear-gradient(to top, rgba(5, 24, 38, .98) 0%, rgba(5, 24, 38, .18) 60%, rgba(5, 24, 38, .1));
  pointer-events: none;
}

.video-controls {
  position: absolute;
  right: 25px;
  bottom: 24px;
  left: 25px;
  z-index: 4;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 9px;
}

.play-icon {
  font-size: 9px;
}

.timeline {
  position: relative;
  flex: 1;
  height: 2px;
  background: rgba(255,255,255,.35);
}

.timeline i {
  position: absolute;
  inset: 0 42% 0 0;
  background: #fff;
}

.stage-note {
  position: absolute;
  z-index: 6;
  padding: 9px 13px;
  color: var(--navy-900);
  background: rgba(255, 254, 250, 0.86);
  border: 1px solid var(--line);
  border-radius: 3px;
  box-shadow: 0 10px 26px rgba(10, 37, 54, 0.1);
  backdrop-filter: blur(8px);
  font-size: 10px;
  font-weight: 700;
}

.note-a {
  bottom: 67px;
  left: 2px;
  transform: rotate(2deg);
}

.note-b {
  right: 43px;
  bottom: 9px;
  transform: rotate(-2deg);
}

.scroll-cue {
  position: absolute;
  bottom: 32px;
  left: 50%;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(16, 37, 54, 0.55);
  font-size: 10px;
  letter-spacing: 0.16em;
  transform: translateX(-50%);
}

.scroll-cue span {
  position: relative;
  width: 18px;
  height: 29px;
  border: 1px solid rgba(16, 37, 54, 0.35);
  border-radius: 12px;
}

.scroll-cue span::before {
  content: "";
  position: absolute;
  top: 6px;
  left: 7px;
  width: 2px;
  height: 6px;
  background: var(--mint-dark);
  animation: scroll-cue 1.5s ease-in-out infinite;
}

@keyframes scroll-cue {
  0% { transform: translateY(0); opacity: 0; }
  35% { opacity: 1; }
  100% { transform: translateY(9px); opacity: 0; }
}

.section-shell {
  width: var(--shell);
  margin: 0 auto;
}

.section-dark {
  color: var(--white);
  background: var(--navy-950);
}

.problem {
  position: relative;
  overflow: hidden;
  padding: 164px 0 176px;
}

.problem::before {
  content: "看懂";
  position: absolute;
  right: -20px;
  bottom: -74px;
  color: rgba(255,255,255,.025);
  font-size: 280px;
  font-weight: 800;
  letter-spacing: -.08em;
  white-space: nowrap;
}

.chapter-heading {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 34px;
  margin-bottom: 96px;
}

.chapter-no {
  width: 72px;
  padding-top: 12px;
  color: var(--mint);
  border-top: 2px solid currentColor;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .18em;
}

.chapter-heading .chapter-label {
  color: rgba(255,255,255,.55);
}

.chapter-heading h2,
.process-heading h2,
.contact h2 {
  max-width: 980px;
  margin: 0;
  font-size: clamp(42px, 5vw, 76px);
  line-height: 1.16;
  letter-spacing: -.06em;
}

.chapter-heading h2 em {
  color: var(--mint);
}

.problem-layout {
  display: grid;
  grid-template-columns: .88fr 1.12fr;
  align-items: start;
  gap: 9vw;
}

.problem-quote {
  position: relative;
  margin: 0;
  padding-top: 84px;
  color: #d9e3e5;
  font-size: clamp(30px, 3.4vw, 48px);
  font-weight: 300;
  line-height: 1.55;
  letter-spacing: -.04em;
}

.quote-mark {
  position: absolute;
  top: -42px;
  left: -8px;
  color: var(--mint);
  font-size: 140px;
  font-family: Georgia, serif;
  line-height: 1;
}

.problem-list {
  border-top: 1px solid var(--line-light);
}

.problem-row {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 26px;
  padding: 35px 0 38px;
  border-bottom: 1px solid var(--line-light);
}

.problem-index {
  color: var(--mint);
  font-size: 11px;
  font-weight: 800;
}

.problem-row h3 {
  margin: 0 0 12px;
  font-size: 24px;
  letter-spacing: -.04em;
}

.problem-row p {
  max-width: 540px;
  margin: 0;
  color: rgba(255,255,255,.6);
  font-size: 15px;
  line-height: 1.85;
}

.section-paper {
  background: var(--paper);
}

.content-types {
  padding: 180px 0 190px;
  background:
    linear-gradient(rgba(16,37,54,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16,37,54,.035) 1px, transparent 1px),
    var(--paper);
  background-size: 64px 64px;
}

.chapter-heading-ink .chapter-label {
  color: var(--ink-soft);
}

.chapter-heading-ink h2 {
  color: var(--navy-950);
}

.chapter-heading-ink h2 em {
  color: var(--mint-dark);
}

.content-switcher {
  overflow: hidden;
  background: var(--white);
  border: 1px solid rgba(16, 37, 54, 0.14);
  box-shadow: var(--shadow-soft);
}

.content-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--line);
}

.content-tab {
  position: relative;
  min-height: 124px;
  padding: 28px 32px;
  text-align: left;
  color: var(--ink-soft);
  background: transparent;
  border: 0;
  border-right: 1px solid var(--line);
  cursor: pointer;
}

.content-tab:last-child {
  border-right: 0;
}

.content-tab::after {
  content: "";
  position: absolute;
  right: 100%;
  bottom: 0;
  left: 0;
  height: 4px;
  background: var(--mint-dark);
  transition: right 260ms ease;
}

.content-tab.is-active {
  color: var(--ink);
  background: rgba(66,214,189,.07);
}

.content-tab.is-active::after {
  right: 0;
}

.content-tab span,
.content-tab strong,
.content-tab small {
  display: block;
}

.content-tab span {
  margin-bottom: 12px;
  color: var(--mint-dark);
  font-size: 10px;
  font-weight: 800;
}

.content-tab strong {
  margin-bottom: 7px;
  font-size: 20px;
}

.content-tab small {
  font-size: 12px;
}

.content-demo {
  min-height: 470px;
  display: grid;
  grid-template-columns: .82fr 1.18fr;
  align-items: center;
  gap: 6vw;
  padding: 58px 64px 68px;
}

.content-demo[hidden] {
  display: none;
}

.demo-kicker {
  margin: 0 0 22px;
  color: var(--red);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .2em;
}

.demo-copy h3 {
  margin: 0;
  font-size: clamp(27px, 3vw, 42px);
  line-height: 1.4;
  letter-spacing: -.04em;
}

.demo-copy ul {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px 20px;
  margin: 36px 0 0;
  padding: 0;
  list-style: none;
}

.demo-copy li {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ink-soft);
  font-size: 13px;
}

.demo-copy li::before {
  content: "";
  width: 6px;
  height: 6px;
  border: 2px solid var(--mint-dark);
  border-radius: 50%;
}

.demo-visual {
  position: relative;
  min-height: 310px;
  overflow: hidden;
  background: var(--mist);
  border: 1px solid rgba(16,37,54,.1);
}

.policy-demo {
  display: flex;
  align-items: center;
  padding: 32px;
}

.mini-doc {
  width: 43%;
  height: 245px;
  padding: 28px 25px;
  background: #fff;
  box-shadow: 0 16px 36px rgba(10,37,54,.12);
}

.mini-doc i {
  display: block;
  width: 82%;
  height: 5px;
  margin-bottom: 13px;
  background: #d8e0e2;
}

.mini-doc i:nth-child(2), .mini-doc i:nth-child(6) { width: 55%; }
.mini-doc b {
  display: block;
  margin: 28px 0 14px;
  padding: 8px;
  color: var(--red);
  background: rgba(217,77,70,.1);
  font-size: 11px;
}

.extract-line {
  width: 48px;
  border-top: 1px dashed var(--mint-dark);
}

.answer-cards {
  flex: 1;
  display: grid;
  gap: 12px;
}

.answer-cards span {
  padding: 19px;
  background: #fff;
  box-shadow: 0 8px 20px rgba(10,37,54,.07);
  font-size: 12px;
}

.answer-cards b {
  display: block;
  margin-bottom: 5px;
  color: var(--mint-dark);
  font-size: 10px;
}

.steps-demo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 38px;
}

.steps-demo div {
  width: 132px;
  height: 150px;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 16px;
  background: #fff;
  box-shadow: 0 12px 30px rgba(10,37,54,.09);
}

.steps-demo b {
  color: var(--mint-dark);
  font-size: 34px;
}

.steps-demo span { font-size: 12px; font-weight: 700; }
.steps-demo i { width: 36px; border-top: 1px dashed var(--mint-dark); }

.qa-demo {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 25px;
  padding: 45px;
}

.bubble {
  max-width: 75%;
  padding: 22px 25px;
  border-radius: 18px;
  font-size: 15px;
  line-height: 1.6;
  box-shadow: 0 10px 28px rgba(10,37,54,.08);
}

.bubble-q { background: #fff; border-bottom-left-radius: 3px; }
.bubble-a { align-self: flex-end; color: #fff; background: var(--mint-dark); border-bottom-right-radius: 3px; }

.case-study {
  padding: 180px 0 0;
  background: #e5eee9;
}

.case-stage {
  width: min(1420px, calc(100vw - 40px));
  min-height: 690px;
  display: grid;
  grid-template-columns: .8fr 1.15fr .85fr;
  gap: 1px;
  margin: 0 auto;
  color: #fff;
  background: rgba(255,255,255,.18);
  box-shadow: var(--shadow-deep);
}

.case-sidebar,
.case-player,
.storyboard {
  position: relative;
  padding: 52px;
  background: var(--navy-900);
}

.case-sidebar {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.case-overline {
  margin: 0 0 26px;
  color: var(--mint);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .2em;
}

.case-sidebar h3 {
  margin: 0 0 38px;
  font-size: clamp(35px, 4vw, 56px);
  line-height: 1.22;
  letter-spacing: -.055em;
}

.case-question {
  margin: 0 0 38px;
  padding-left: 18px;
  color: #d9e4e7;
  border-left: 3px solid var(--amber);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.75;
}

.case-sidebar dl {
  margin: 0;
  border-top: 1px solid var(--line-light);
}

.case-sidebar dl div {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line-light);
  font-size: 11px;
}

.case-sidebar dt { color: rgba(255,255,255,.5); }
.case-sidebar dd { margin: 0; text-align: right; }

.case-player {
  overflow: hidden;
  background:
    linear-gradient(to top, rgba(5, 23, 35, .97), transparent 56%),
    linear-gradient(145deg, #a9d0ca, #47737a 45%, #0c2d40);
}

.case-player::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: .25;
  background-image: radial-gradient(rgba(255,255,255,.4) 1px, transparent 1px);
  background-size: 12px 12px;
}

.case-player-top {
  position: relative;
  z-index: 3;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 10px;
  letter-spacing: .08em;
}

.case-player-top span:first-child {
  padding: 8px 10px;
  color: var(--navy-950);
  background: var(--amber);
  font-weight: 800;
}

.case-presenter-photo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 53% center;
}

.case-player > p {
  position: absolute;
  right: 50px;
  bottom: 76px;
  left: 50px;
  z-index: 5;
  margin: 0;
  font-size: clamp(22px, 2.4vw, 36px);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -.035em;
}

.play-button {
  position: absolute;
  z-index: 6;
  top: calc(50% - 32px);
  left: calc(50% - 32px);
  width: 64px;
  height: 64px;
  color: #fff;
  background: rgba(7,27,44,.55);
  border: 1px solid rgba(255,255,255,.5);
  border-radius: 50%;
  backdrop-filter: blur(9px);
  cursor: pointer;
  transition: transform 200ms ease, background 200ms ease;
}

.play-button:hover { transform: scale(1.08); background: var(--mint-dark); }

.player-progress {
  position: absolute;
  right: 50px;
  bottom: 43px;
  left: 50px;
  z-index: 5;
  height: 2px;
  background: rgba(255,255,255,.35);
}

.player-progress i { display: block; width: 42%; height: 100%; background: var(--mint); }

.storyboard {
  color: var(--ink);
  background: #f6f3eb;
}

.storyboard-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
  font-size: 12px;
}

.storyboard-head span { font-size: 17px; font-weight: 700; }
.storyboard-head b { color: var(--mint-dark); font-size: 10px; }

.storyboard ol { margin: 0; padding: 0; list-style: none; }
.storyboard li {
  position: relative;
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 16px;
  align-items: center;
  min-height: 76px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  transition: background 180ms ease, transform 180ms ease;
}

.storyboard li:hover,
.storyboard li.is-current {
  background: #fff;
  transform: translateX(-8px);
  box-shadow: 0 10px 25px rgba(10,37,54,.08);
}

.storyboard li > span {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: var(--mint-dark);
  border: 1px solid currentColor;
  border-radius: 50%;
  font-size: 9px;
  font-weight: 800;
}

.storyboard li b, .storyboard li small { display: block; }
.storyboard li b { margin-bottom: 7px; font-size: 12px; }
.storyboard li small { color: var(--ink-soft); font-size: 9px; }

.process {
  padding: 200px 0 190px;
  background: var(--white);
}

.process-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8vw;
  margin-bottom: 104px;
}

.process-heading .chapter-label {
  flex: 0 0 180px;
  margin-top: 18px;
  color: var(--mint-dark);
}

.process-heading h2 {
  max-width: 930px;
  color: var(--navy-950);
  font-size: clamp(38px, 4.6vw, 66px);
}

.process-heading h2 em { color: var(--red); }

.process-track {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 34px;
}

.track-line {
  position: absolute;
  top: 67px;
  right: 6%;
  left: 6%;
  height: 1px;
  background: #c7d5d6;
}

.track-line i {
  display: block;
  width: 78%;
  height: 100%;
  background: var(--mint-dark);
}

.process-track article { position: relative; z-index: 2; }
.process-track article > span {
  display: block;
  margin-bottom: 24px;
  color: var(--ink-soft);
  font-size: 9px;
  font-weight: 800;
}

.process-icon {
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  margin-bottom: 32px;
  color: #fff;
  background: var(--navy-900);
  border: 9px solid var(--white);
  border-radius: 50%;
  box-shadow: 0 0 0 1px #c7d5d6;
  font-size: 17px;
  font-weight: 700;
}

.process-track article:nth-of-type(2) .process-icon,
.process-track article:nth-of-type(4) .process-icon { background: var(--mint-dark); }
.process-track article:nth-of-type(3) .process-icon { background: var(--red); }

.process-track h3 { margin: 0 0 13px; font-size: 18px; }
.process-track p { margin: 0; color: var(--ink-soft); font-size: 12px; line-height: 1.8; }

.section-ink {
  color: #fff;
  background: var(--navy-950);
}

.evidence {
  position: relative;
  overflow: hidden;
  padding: 180px 0 170px;
}

.evidence::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: .07;
  background-image: linear-gradient(rgba(255,255,255,.25) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.25) 1px, transparent 1px);
  background-size: 60px 60px;
}

.evidence .section-shell { position: relative; z-index: 2; }
.evidence-stage {
  min-height: 520px;
  display: grid;
  grid-template-columns: 1fr 190px .86fr;
  align-items: center;
}

.evidence-document,
.evidence-video {
  position: relative;
  min-height: 430px;
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow-deep);
}

.doc-toolbar {
  height: 48px;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 0 18px;
  color: var(--ink);
  background: #e7e9e6;
  border-bottom: 1px solid #d4d7d4;
  font-size: 9px;
}

.doc-toolbar > span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #afb8b6;
}

.doc-toolbar b { flex: 1; margin-left: 10px; }
.doc-body { padding: 48px 55px; color: #394c57; }
.doc-title { color: var(--ink); font-weight: 800; }
.doc-body p { font-size: 13px; line-height: 2.1; }

.evidence-mark {
  position: relative;
  margin: 28px -12px;
  padding: 17px 20px;
  color: var(--ink);
  background: rgba(230,166,82,.17);
  border-left: 4px solid var(--red);
}

.evidence-mark i {
  position: absolute;
  inset: -7px -10px;
  border: 2px solid var(--red);
  border-radius: 50%;
  transform: rotate(-2deg);
}

.evidence-bridge {
  position: relative;
  z-index: 4;
  min-height: 260px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.evidence-bridge svg {
  position: absolute;
  inset: 90px -18px auto;
  width: calc(100% + 36px);
  height: 100px;
  overflow: visible;
}

.evidence-bridge path {
  fill: none;
  stroke: var(--mint);
  stroke-width: 2;
  stroke-dasharray: 5 6;
}

.evidence-bridge span {
  position: relative;
  z-index: 3;
  padding: 11px 15px;
  color: var(--navy-950);
  background: var(--mint);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .1em;
}

.pulse {
  position: absolute;
  width: 12px;
  height: 12px;
  border: 2px solid var(--mint);
  border-radius: 50%;
  animation: pulse 1.8s ease-out infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(66,214,189,.35); }
  100% { box-shadow: 0 0 0 24px rgba(66,214,189,0); }
}

.evidence-video {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 46px;
  color: #fff;
  background:
    radial-gradient(circle at 85% 15%, rgba(66,214,189,.35), transparent 30%),
    linear-gradient(145deg, #16445d, #0a263b);
}

.evidence-video-head {
  position: absolute;
  top: 25px;
  right: 28px;
  left: 28px;
  display: flex;
  justify-content: space-between;
  font-size: 10px;
}

.evidence-video-head span { color: var(--mint); font-weight: 700; }
.evidence-video-head small { opacity: .45; }

.evidence-amount span,
.evidence-amount strong,
.evidence-amount b { display: block; }
.evidence-amount span { margin-bottom: 9px; color: rgba(255,255,255,.62); font-size: 11px; }
.evidence-amount strong { font-size: 76px; line-height: 1; letter-spacing: -.06em; }
.evidence-amount b { margin-top: 8px; color: var(--amber); font-size: 13px; }
.evidence-video > p { max-width: 390px; margin: 45px 0 0; color: #d6e2e6; font-size: 17px; line-height: 1.75; }
.evidence-timeline { position: absolute; right: 34px; bottom: 30px; left: 34px; height: 2px; background: rgba(255,255,255,.25); }
.evidence-timeline span { position: absolute; width: 61%; height: 100%; background: var(--mint); }
.evidence-timeline i { position: absolute; left: 61%; top: -3px; width: 8px; height: 8px; border-radius: 50%; background: #fff; }
.evidence-timeline small { position: absolute; right: 0; top: 12px; color: rgba(255,255,255,.5); font-size: 9px; }

.trust-points {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: 96px;
  background: var(--line-light);
  border: 1px solid var(--line-light);
}

.trust-points article { min-height: 240px; padding: 42px; background: var(--navy-950); }
.trust-points article > span { display: block; margin-bottom: 46px; color: var(--mint); font-size: 22px; font-weight: 700; }
.trust-points h3 { margin: 0 0 12px; font-size: 19px; }
.trust-points p { max-width: 270px; margin: 0; color: rgba(255,255,255,.55); font-size: 12px; line-height: 1.75; }

.evidence-ui-preview {
  margin: 96px 0 0;
  overflow: hidden;
  color: var(--ink);
  background: var(--white);
  box-shadow: var(--shadow-deep);
}

.evidence-ui-preview img {
  display: block;
  width: 100%;
  height: auto;
}

.evidence-ui-preview figcaption {
  padding: 24px 30px;
  color: var(--ink-soft);
  background: var(--white);
  border-top: 1px solid var(--line);
  font-size: 12px;
  line-height: 1.75;
}

.workspace {
  padding: 190px 0;
  background: #f3f0e7;
}

.product-shot {
  margin: 0;
  overflow: hidden;
  background: var(--navy-900);
  box-shadow: var(--shadow-deep);
}

.browser-chrome {
  height: 58px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 22px;
  color: rgba(255,255,255,.64);
  background: var(--navy-950);
  font-size: 10px;
}

.browser-chrome > span { width: 8px; height: 8px; border-radius: 50%; background: rgba(255,255,255,.25); }
.browser-chrome p { flex: 1; margin-left: 14px; }
.browser-chrome small { color: var(--mint); }
.product-shot img { display: block; width: 100%; height: auto; }
.product-shot figcaption {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line-light);
}
.product-shot figcaption > div {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 14px;
  padding: 30px;
  color: #fff;
  background: var(--navy-900);
}
.product-shot figcaption span { color: var(--mint); font-size: 10px; font-weight: 800; }
.product-shot figcaption p { margin: 0; color: rgba(255,255,255,.58); font-size: 11px; line-height: 1.75; }
.product-shot figcaption b { display: block; margin-bottom: 7px; color: #fff; font-size: 13px; }

.languages {
  padding: 174px 0;
  background: var(--white);
}

.languages-layout {
  display: grid;
  grid-template-columns: .72fr 1.28fr;
  gap: 8vw;
  align-items: center;
}

.languages-copy .chapter-label { color: var(--mint-dark); }
.languages-copy h2 { margin: 0; font-size: clamp(34px, 4vw, 57px); line-height: 1.3; letter-spacing: -.055em; }
.languages-copy > p:last-child { max-width: 430px; margin: 32px 0 0; color: var(--ink-soft); font-size: 15px; line-height: 1.85; }

.languages-visual {
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(16,37,54,.12);
  border-radius: 18px;
  background: #f9f8f3;
  box-shadow: 0 24px 60px rgba(16,37,54,.12);
}

.languages-visual img {
  display: block;
  width: 100%;
  height: auto;
}

.language-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.language-card {
  position: relative;
  min-height: 230px;
  overflow: hidden;
  padding: 24px;
  background: var(--mist);
  border: 1px solid rgba(16,37,54,.09);
  transition: transform 220ms ease, box-shadow 220ms ease;
}

.language-card:hover { z-index: 3; transform: translateY(-8px); box-shadow: var(--shadow-soft); }
.language-card.featured { color: #fff; background: var(--navy-900); }
.language-card > span { color: var(--mint-dark); font-size: 9px; font-weight: 800; }
.language-card.featured > span { color: var(--mint); }
.language-card h3 { position: absolute; left: 24px; bottom: 42px; margin: 0; font-size: 20px; }
.language-card p { position: absolute; left: 24px; bottom: 20px; margin: 0; color: var(--ink-soft); font-size: 10px; }
.language-card.featured p { color: rgba(255,255,255,.55); }

.lang-portrait,
.lang-chart,
.lang-comic,
.lang-deduce,
.lang-screen,
.lang-dialog {
  position: absolute;
  inset: 34px 24px 80px;
}

.lang-portrait { border: 1px solid rgba(255,255,255,.2); border-radius: 50% 50% 8% 8%; }
.lang-portrait::before { content: ""; position: absolute; width: 38px; height: 46px; left: calc(50% - 19px); top: 14px; border-radius: 46%; background: #dcb79f; box-shadow: inset 0 8px #29201e; }
.lang-portrait::after { content: ""; position: absolute; width: 100px; height: 70px; left: calc(50% - 50px); bottom: -2px; border-radius: 45% 45% 0 0; background: #e7e3dd; }
.lang-chart { display: flex; align-items: end; justify-content: center; gap: 10px; padding: 16px 30px; border-bottom: 1px solid var(--line); }
.lang-chart i { width: 24px; background: var(--mint-dark); }
.lang-chart i:nth-child(1) { height: 40%; opacity: .45; }
.lang-chart i:nth-child(2) { height: 75%; opacity: .7; }
.lang-chart i:nth-child(3) { height: 100%; }
.lang-comic { display: flex; align-items: center; justify-content: center; gap: 7px; }
.lang-comic i { position: relative; width: 35px; height: 35px; border-radius: 50%; background: var(--amber); }
.lang-comic i::after { content: ""; position: absolute; width: 50px; height: 45px; left: -8px; top: 31px; border-radius: 45% 45% 0 0; background: var(--mint-dark); }
.lang-comic i:nth-child(2) { transform: translateY(-12px); background: #e9b7a2; }
.lang-comic i:nth-child(3) { background: #c89680; }
.lang-deduce { display: grid; place-items: center; color: var(--red); border: 1px dashed currentColor; border-radius: 50%; font-size: 37px; font-weight: 800; }
.lang-screen { display: grid; place-items: center; border: 4px solid var(--navy-800); border-radius: 4px; }
.lang-screen i { width: 50%; height: 4px; background: var(--mint-dark); box-shadow: 0 14px var(--mint-dark), 0 -14px var(--mint-dark); }
.lang-dialog i { position: absolute; width: 78%; height: 50px; border-radius: 16px 16px 16px 3px; background: #fff; box-shadow: 0 7px 20px rgba(10,37,54,.1); }
.lang-dialog i:last-child { right: 0; bottom: 0; background: var(--mint-dark); border-radius: 16px 16px 3px 16px; }

.contact {
  position: relative;
  overflow: hidden;
  padding: 170px 30px;
  color: #fff;
  text-align: center;
  background:
    radial-gradient(circle at 50% 100%, rgba(66,214,189,.25), transparent 38%),
    var(--navy-900);
}

.contact .orbit-one { width: 650px; height: 650px; left: calc(50% - 325px); top: 35px; border-color: rgba(66,214,189,.16); }
.contact .orbit-two { width: 420px; height: 420px; left: calc(50% - 210px); top: 150px; border-color: rgba(66,214,189,.12); }
.contact-inner { position: relative; z-index: 3; }
.contact .chapter-label { color: var(--mint); }
.contact h2 { max-width: 960px; margin: 0 auto; }
.contact h2 em { color: var(--mint); }
.contact-inner > p:not(.chapter-label) { margin: 34px 0 0; color: rgba(255,255,255,.6); font-size: 16px; }
.contact-actions { display: flex; align-items: center; justify-content: center; gap: 30px; margin-top: 45px; }
.button-mint { color: var(--navy-950); background: var(--mint); box-shadow: 0 14px 34px rgba(66,214,189,.2); }
.button-mint:hover { background: #78ead7; }
.contact-link { padding: 10px 0; color: rgba(255,255,255,.72); border-bottom: 1px solid rgba(255,255,255,.3); font-size: 13px; }

/* 预约面板沿用秒懂政务的“政务联系卡”语言，不复制 A9 官网的暗色容器。 */
.booking-popover {
  --booking-arrow-left: 50%;
  position: fixed;
  z-index: 220;
  width: min(300px, calc(100vw - 24px));
  padding: 0;
  color: var(--ink);
  background: var(--white);
  border: 1px solid rgba(16, 37, 54, .14);
  border-radius: 6px;
  box-shadow: 0 20px 56px rgba(10, 40, 58, .2);
  animation: booking-popover-in 180ms cubic-bezier(.2, .7, .2, 1);
}

.booking-popover::before {
  content: "";
  position: absolute;
  left: var(--booking-arrow-left);
  width: 12px;
  height: 12px;
  background: var(--white);
  border: solid rgba(16, 37, 54, .14);
  transform: translateX(-50%) rotate(45deg);
}

.booking-popover[data-placement="bottom"] { transform-origin: var(--booking-arrow-left) top; }
.booking-popover[data-placement="bottom"]::before { top: -7px; border-width: 1px 0 0 1px; }
.booking-popover[data-placement="top"] { transform-origin: var(--booking-arrow-left) bottom; }
.booking-popover[data-placement="top"]::before { bottom: -7px; border-width: 0 1px 1px 0; }

.booking-popover-close {
  position: absolute;
  z-index: 2;
  top: 9px;
  right: 10px;
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  color: var(--white);
  background: var(--navy-900);
  border: 0;
  border-radius: 50%;
  box-shadow: none;
  cursor: pointer;
}

.booking-popover-close:hover { background: var(--mint-dark); }

.booking-qr {
  position: relative;
  margin: 0;
  padding: 14px;
  overflow: hidden;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(13, 134, 119, .05) 1px, transparent 1px) 0 0 / 24px 24px,
    var(--white);
  border-radius: 6px;
  text-align: center;
}

.booking-qr::after {
  content: "政";
  position: absolute;
  right: 14px;
  bottom: 12px;
  width: 25px;
  height: 25px;
  display: grid;
  place-items: center;
  color: rgba(217, 77, 70, .72);
  border: 1px solid rgba(217, 77, 70, .55);
  border-radius: 50%;
  font-size: 11px;
  font-weight: 700;
}

.booking-qr-label {
  display: flex;
  align-items: center;
  gap: 7px;
  margin: 1px 32px 10px 1px;
  color: var(--mint-dark);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .08em;
  text-align: left;
}

.booking-qr-label span {
  width: 7px;
  height: 7px;
  background: var(--mint);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(66, 214, 189, .14);
}

.booking-qr img {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  object-fit: contain;
  background: #fff;
  image-rendering: pixelated;
}

.booking-qr figcaption {
  display: grid;
  gap: 4px;
  margin: 11px 28px 2px 0;
  text-align: left;
}

.booking-qr figcaption b { font-size: 14px; }
.booking-qr figcaption span { color: var(--ink-soft); font-size: 10px; line-height: 1.55; }

@keyframes booking-popover-in {
  from { opacity: 0; transform: scale(.96) translateY(-4px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.site-footer {
  padding: 58px max(5vw, calc((100vw - 1440px) / 2)) 24px;
  color: rgba(255,255,255,.5);
  background: var(--navy-950);
  font-size: 12px;
}

.footer-brand { color: #fff; }
.footer-brand .brand-seed { border-color: #fff; }
.footer-brand .brand-divider { background: rgba(255,255,255,.25); }

.footer-main {
  display: grid;
  grid-template-columns: minmax(210px, .8fr) minmax(560px, 2fr) minmax(310px, 1fr);
  gap: clamp(36px, 5vw, 86px);
  align-items: start;
}

.footer-identity > p {
  max-width: 230px;
  margin: 24px 0 0;
  color: rgba(255,255,255,.42);
  line-height: 1.7;
}

.footer-company {
  display: grid;
  grid-template-columns: 1fr 1.45fr;
  gap: 28px 42px;
}

.footer-company .footer-subsidiaries { grid-column: 1; grid-row: 2; }
.footer-company .footer-contact { grid-column: 2; grid-row: 2; }
.footer-company small,
.footer-subsidiaries > small,
.footer-links > small {
  display: block;
  margin-bottom: 10px;
  color: var(--mint);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .16em;
}

.footer-company strong,
.footer-company p,
.footer-company a,
.footer-subsidiaries p,
.footer-links span {
  margin: 0;
  color: rgba(255,255,255,.78);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.75;
  text-decoration: none;
}

.footer-company a:hover { color: var(--mint); }
.footer-subsidiaries p + p { margin-top: 8px; }
.footer-links {
  display: grid;
  align-content: start;
  gap: 8px;
}
.footer-links > small { margin-bottom: 2px; }

.footer-bottom {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 28px;
  margin-top: 38px;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,.12);
  color: rgba(255,255,255,.38);
  font-size: 10px;
}

.footer-bottom p { margin: 0; }
.footer-bottom > a {
  color: rgba(255,255,255,.62);
  text-decoration: none;
}
.footer-bottom > a:hover { color: var(--mint); }
.footer-bottom .footer-note { text-align: right; letter-spacing: .12em; }

.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 700ms ease, transform 700ms cubic-bezier(.2,.7,.2,1);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}

@media (max-width: 1100px) {
  :root { --shell: min(100% - 48px, 980px); }
  .site-nav { display: none; }
  .site-header { grid-template-columns: 1fr auto; }
  .hero { min-height: auto; grid-template-columns: 1fr; padding-top: 150px; }
  .hero-copy { max-width: 770px; }
  .hero-stage { width: min(680px, 100%); margin: 0 auto; }
  .problem-layout { gap: 6vw; }
  .case-stage { grid-template-columns: .8fr 1.2fr; }
  .storyboard { grid-column: 1 / -1; }
  .storyboard ol { display: grid; grid-template-columns: repeat(3, 1fr); }
  .evidence-stage { grid-template-columns: 1fr 100px 1fr; }
  .languages-layout { grid-template-columns: 1fr; }
  .languages-copy { max-width: 680px; }
}

@media (max-width: 760px) {
  :root { --shell: calc(100% - 34px); }
  .desktop-only { display: none; }
  .site-header { height: 68px; padding: 0 18px; }
  .brand-divider, .brand-cn, .header-cta { display: none; }
  .nav-toggle {
    justify-self: end;
    width: 42px;
    height: 42px;
    display: grid;
    place-content: center;
    gap: 6px;
    color: inherit;
    background: transparent;
    border: 1px solid var(--line);
  }
  .nav-toggle span:not(.sr-only) { display: block; width: 17px; border-top: 2px solid currentColor; }
  .site-nav {
    position: absolute;
    top: 68px;
    right: 0;
    left: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px 18px 20px;
    background: rgba(244,241,233,.98);
    border-bottom: 1px solid var(--line);
  }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: 14px 4px; border-bottom: 1px solid var(--line); }
  .hero { display: block; padding: 118px 18px 96px; }
  .hero h1 { font-size: clamp(50px, 15vw, 70px); }
  .hero-lead { font-size: 16px; }
  .hero-actions { align-items: flex-start; flex-direction: column; }
  .hero-manifesto { flex-direction: column; }
  .hero-stage { min-height: 560px; margin-top: 50px; }
  .paper-stack { top: 45px; left: 0; width: 235px; height: 330px; }
  .policy-paper { padding: 23px; }
  .policy-paper h2 { margin: 20px 0 14px; font-size: 19px; }
  .policy-paper p { font-size: 8px; }
  .paper-highlight { margin: 16px 0; padding: 8px; }
  .paper-highlight strong { font-size: 19px; }
  .policy-paper footer { right: 20px; bottom: 15px; left: 20px; }
  .translation-path { top: 210px; left: 210px; }
  .translation-path::before { width: 78px; }
  .translation-path span:nth-child(n+3) { display: none; }
  .video-card { top: 130px; right: -24px; width: 225px; height: 370px; padding: 16px; border-width: 5px; }
  .presenter-photo { object-position: 54% 40%; }
  .video-card h3 { right: 16px; bottom: 52px; left: 16px; font-size: 16px; }
  .video-controls { right: 16px; bottom: 18px; left: 16px; }
  .note-a { bottom: 55px; }
  .note-b { right: 0; bottom: 5px; }
  .scroll-cue { display: none; }
  .problem, .content-types, .evidence, .workspace, .languages { padding: 110px 0; }
  .case-study { padding-top: 110px; }
  .chapter-heading { grid-template-columns: 1fr; gap: 24px; margin-bottom: 58px; }
  .chapter-heading h2, .process-heading h2, .contact h2 { font-size: 39px; }
  .problem-layout { grid-template-columns: 1fr; gap: 60px; }
  .problem-quote { font-size: 30px; }
  .content-tabs { grid-template-columns: 1fr; }
  .content-tab { min-height: 90px; padding: 20px 22px; border-right: 0; border-bottom: 1px solid var(--line); }
  .content-tab span { margin-bottom: 7px; }
  .content-demo { min-height: auto; grid-template-columns: 1fr; padding: 38px 24px; }
  .demo-copy ul { grid-template-columns: 1fr; }
  .demo-visual { min-height: 260px; }
  .policy-demo { padding: 18px; }
  .mini-doc { width: 48%; height: 210px; padding: 20px 15px; }
  .answer-cards span { padding: 13px; font-size: 10px; }
  .steps-demo { gap: 6px; padding: 16px; }
  .steps-demo div { width: 90px; height: 120px; }
  .steps-demo i { width: 15px; }
  .case-stage { width: calc(100% - 18px); grid-template-columns: 1fr; }
  .case-sidebar, .case-player, .storyboard { padding: 34px 26px; }
  .case-player { min-height: 560px; }
  .storyboard ol { grid-template-columns: 1fr; }
  .process { padding: 120px 0; }
  .process-heading { display: block; margin-bottom: 68px; }
  .process-heading .chapter-label { margin-bottom: 25px; }
  .process-track { grid-template-columns: 1fr; gap: 0; }
  .track-line { top: 25px; bottom: 55px; left: 28px; width: 1px; height: auto; }
  .track-line i { width: 100%; height: 82%; }
  .process-track article { display: grid; grid-template-columns: 55px 1fr; column-gap: 22px; padding-bottom: 38px; }
  .process-track article > span { grid-column: 2; margin-bottom: 7px; }
  .process-icon { grid-row: 1 / 4; grid-column: 1; width: 48px; height: 48px; margin: 0; }
  .process-track h3, .process-track p { grid-column: 2; }
  .evidence-stage { grid-template-columns: 1fr; gap: 0; }
  .evidence-document, .evidence-video { min-height: 430px; }
  .evidence-bridge { min-height: 120px; }
  .evidence-bridge svg { inset: 10px 50% auto; width: 100px; height: 100px; transform: rotate(90deg); transform-origin: left center; }
  .trust-points { grid-template-columns: 1fr; }
  .trust-points article { min-height: 190px; }
  .trust-points article > span { margin-bottom: 28px; }
  .product-shot figcaption { grid-template-columns: 1fr; }
  .browser-chrome small { display: none; }
  .language-grid { grid-template-columns: repeat(2, 1fr); }
  .language-card { min-height: 210px; }
  .contact { padding: 120px 18px; }
  .contact-actions { flex-direction: column; }
  .site-footer { padding: 48px 24px 28px; }
  .footer-main { grid-template-columns: 1fr 1.8fr; gap: 44px; }
  .footer-links { grid-column: 1 / -1; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.1); }
  .footer-bottom { grid-template-columns: 1fr auto; }
  .footer-bottom .footer-note { grid-column: 1 / -1; text-align: left; }
}

@media (max-width: 420px) {
  .hero-stage { transform: scale(.92); transform-origin: left top; width: 108%; }
  .language-grid { grid-template-columns: 1fr; }
  .doc-body { padding: 38px 28px; }
  .evidence-video { padding: 34px 28px; }
  .evidence-amount strong { font-size: 60px; }
  .footer-main,
  .footer-company,
  .footer-bottom { grid-template-columns: 1fr; }
  .footer-main { gap: 36px; }
  .footer-company .footer-subsidiaries,
  .footer-company .footer-contact,
  .footer-links { grid-column: auto; grid-row: auto; }
  .footer-company,
  .footer-subsidiaries,
  .footer-links { padding-top: 24px; border-top: 1px solid rgba(255,255,255,.1); }
  .footer-bottom { gap: 10px; }
  .footer-bottom .footer-note { grid-column: auto; }
}