:root {
  --ink: #17141b;
  --ink-2: #242129;
  --paper: #ffffff;
  --soft: #f5f3f5;
  --line: #d9d4db;
  --muted: #6f6973;
  --purple: #660874;
  --purple-light: #f2e8f4;
  --blue: #0b5f82;
  --teal: #087f70;
  --gold: #c5a24a;
  --green: #13845f;
  --max: 1240px;
}

* { box-sizing: border-box; letter-spacing: 0; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: "Microsoft YaHei", "Noto Sans SC", sans-serif; line-height: 1.6; }
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; }
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid rgba(8,127,112,.45); outline-offset: 3px; }
.skip-link { position: fixed; left: 12px; top: -80px; z-index: 200; background: #fff; color: #000; padding: 10px 14px; }
.skip-link:focus { top: 12px; }

.site-header { position: fixed; inset: 0 0 auto; z-index: 100; height: 74px; padding: 0 max(24px, calc((100vw - var(--max))/2)); display: flex; align-items: center; justify-content: space-between; gap: 28px; background: rgba(19,17,22,.94); border-bottom: 1px solid rgba(255,255,255,.14); backdrop-filter: blur(14px); color: #fff; }
.brand img { width: 128px; filter: brightness(0) invert(1); }
.desktop-nav { display: flex; align-items: center; gap: 28px; }
.desktop-nav a { text-decoration: none; color: rgba(255,255,255,.72); font-size: 14px; }
.desktop-nav a:hover { color: #fff; }
.header-actions { display: flex; align-items: center; gap: 10px; }
.icon-button { width: 40px; height: 40px; border: 1px solid rgba(255,255,255,.24); background: transparent; color: #fff; display: inline-flex; align-items: center; justify-content: center; gap: 4px; cursor: pointer; }
.icon-button svg { width: 18px; height: 18px; }
.icon-button span { font-size: 11px; font-weight: 800; }
.menu-toggle { display: none; }
.mobile-nav { position: fixed; inset: 74px 0 0; z-index: 90; background: var(--ink); color: #fff; padding: 32px 24px; }
.mobile-nav a { display: block; padding: 16px 0; border-bottom: 1px solid rgba(255,255,255,.14); text-decoration: none; font-size: 20px; }

.button { min-height: 46px; display: inline-flex; align-items: center; justify-content: center; gap: 10px; padding: 0 18px; border: 1px solid var(--purple); border-radius: 4px; background: var(--purple); color: #fff; text-decoration: none; font-weight: 800; cursor: pointer; }
.button:hover { background: #7b1689; }
.button svg { width: 18px; height: 18px; }
.button-small { min-height: 38px; font-size: 13px; padding: 0 14px; }
.button-ghost { border-color: rgba(255,255,255,.52); background: rgba(15,14,17,.32); }
.button-ghost:hover { background: rgba(255,255,255,.12); }

.hero { position: relative; min-height: 760px; height: 92vh; max-height: 920px; overflow: hidden; color: #fff; display: flex; align-items: center; }
.hero-image { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(18,15,20,.96) 0%, rgba(18,15,20,.82) 48%, rgba(18,15,20,.24) 100%); }
.hero-content { position: relative; z-index: 2; width: min(var(--max), calc(100% - 48px)); margin: 30px auto 0; }
.eyebrow { margin: 0 0 18px; font-family: Bahnschrift, sans-serif; font-size: 13px; font-weight: 800; color: var(--gold); text-transform: uppercase; }
.eyebrow.purple { color: var(--purple); }
.eyebrow.teal { color: var(--teal); }
.eyebrow.gold { color: var(--gold); }
.hero h1 { margin: 0; max-width: 850px; font-size: 68px; line-height: 1.14; font-weight: 900; }
.hero-copy { max-width: 680px; margin: 26px 0 34px; font-size: 19px; color: rgba(255,255,255,.78); }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-proof { position: absolute; z-index: 3; right: max(24px, calc((100vw - var(--max))/2)); bottom: 0; display: grid; grid-template-columns: repeat(3, 150px); background: rgba(255,255,255,.95); color: var(--ink); }
.hero-proof div { padding: 20px 18px; border-left: 1px solid var(--line); }
.hero-proof strong { display: block; font-family: Bahnschrift, sans-serif; color: var(--purple); font-size: 28px; line-height: 1; }
.hero-proof span { display: block; margin-top: 8px; color: var(--muted); font-size: 12px; }

.section { width: min(var(--max), calc(100% - 48px)); margin: 0 auto; padding: 104px 0; }
.section-dark, .section-ink { width: 100%; max-width: none; padding-left: max(24px, calc((100vw - var(--max))/2)); padding-right: max(24px, calc((100vw - var(--max))/2)); }
.section-dark { background: var(--ink); color: #fff; }
.section-ink { background: #242028; color: #fff; }
.section-intro h2, .section-heading h2 { margin: 0; font-size: 46px; line-height: 1.24; }
.section-heading { max-width: 850px; margin-bottom: 50px; }
.section-heading > p:last-child { max-width: 680px; color: var(--muted); font-size: 17px; }
.section-heading.light > p:last-child { color: rgba(255,255,255,.64); }

.statement { display: grid; grid-template-columns: 1fr 1fr; gap: 90px; align-items: end; }
.statement-copy { border-left: 4px solid var(--purple); padding-left: 28px; }
.statement-copy .lead { margin: 0 0 18px; color: var(--purple); font-size: 25px; font-weight: 900; line-height: 1.45; }
.statement-copy p:last-child { color: var(--muted); }

.layer-flow { display: grid; grid-template-columns: 1fr 56px 1fr 56px 1fr; align-items: stretch; }
.layer { position: relative; min-height: 270px; padding: 30px; border: 1px solid rgba(255,255,255,.16); background: #201d23; }
.layer > svg { width: 34px; height: 34px; margin: 38px 0 28px; color: var(--gold); }
.layer h3 { margin: 0 0 12px; font-size: 20px; }
.layer p { margin: 0; color: rgba(255,255,255,.65); font-size: 14px; }
.layer-index { position: absolute; right: 20px; top: 16px; color: rgba(255,255,255,.2); font-family: Bahnschrift, sans-serif; font-size: 44px; font-weight: 900; }
.layer-mozi { background: var(--purple); border-color: var(--purple); }
.layer-mozi > svg { color: #fff; }
.layer-passport { border-top: 4px solid var(--teal); }
.flow-arrow { display: flex; align-items: center; justify-content: center; color: var(--gold); }

.translation { display: grid; grid-template-columns: 380px 1fr; gap: 74px; align-items: start; }
.translation-track { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.translation-track > div { position: relative; min-height: 150px; padding: 26px 22px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); display: flex; flex-direction: column; justify-content: space-between; }
.translation-track span { position: absolute; top: 12px; right: 14px; color: #c6c0c8; font-family: Bahnschrift, sans-serif; }
.translation-track svg { width: 30px; height: 30px; color: var(--teal); }
.translation-track strong { font-size: 15px; }

.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.product-grid article { position: relative; min-height: 238px; padding: 30px 26px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.product-grid article:hover { background: var(--soft); }
.product-grid svg { width: 32px; height: 32px; color: var(--purple); }
.product-grid article > span { position: absolute; right: 20px; top: 18px; color: #c7c0c9; font-family: Bahnschrift, sans-serif; font-size: 28px; font-weight: 900; }
.product-grid h3 { margin: 32px 0 12px; font-family: Bahnschrift, "Microsoft YaHei", sans-serif; font-size: 19px; }
.product-grid p { margin: 0; color: var(--muted); font-size: 14px; }
.text-link { display: inline-flex; gap: 8px; align-items: center; margin-top: 26px; color: var(--purple); font-weight: 800; text-decoration: none; }
.text-link svg { width: 18px; height: 18px; }

.school-list { border-top: 1px solid rgba(255,255,255,.16); }
.school-list article { display: grid; grid-template-columns: 240px 1fr; gap: 34px; padding: 22px 0; border-bottom: 1px solid rgba(255,255,255,.16); align-items: center; }
.school-photo { height: 130px; overflow: hidden; }
.school-photo img { width: 100%; height: 100%; object-fit: cover; }
.school-list article > div:last-child { display: grid; grid-template-columns: 60px 1fr; align-items: center; }
.school-list span { color: var(--gold); font-family: Bahnschrift, sans-serif; font-size: 17px; }
.school-list h3 { margin: 0; font-size: 30px; }
.school-list p { grid-column: 2; margin: 8px 0 0; color: rgba(255,255,255,.58); }

.evidence-heading { max-width: none; display: grid; grid-template-columns: 1fr 420px; gap: 80px; align-items: end; }
.case-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 18px; }
.case { background: var(--soft); border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.case img { width: 100%; height: 230px; object-fit: cover; }
.case-featured img { height: 310px; }
.case-copy { padding: 24px; }
.case-copy > span { color: var(--purple); font-size: 11px; font-weight: 900; }
.case-copy h3 { margin: 10px 0; font-size: 21px; }
.case-copy p { color: var(--muted); font-size: 14px; }
.case-copy small { display: block; margin-top: 22px; border-top: 1px solid var(--line); padding-top: 12px; color: var(--blue); }
.evidence-index { margin-top: 18px; display: flex; border: 1px solid var(--line); }
.evidence-index span { flex: 1; padding: 12px 16px; border-right: 1px solid var(--line); text-align: center; font-size: 12px; }
.evidence-index span:first-child { background: var(--purple); color: #fff; font-weight: 900; }

.pilot { display: grid; grid-template-columns: 380px 1fr; gap: 72px; }
.pilot-timeline { display: grid; grid-template-columns: repeat(5, 1fr); align-self: start; }
.pilot-timeline article { position: relative; min-height: 180px; padding: 25px 15px; border-top: 4px solid var(--purple); border-right: 1px solid var(--line); background: var(--soft); }
.pilot-timeline span { display: block; color: var(--purple); font-family: Bahnschrift, sans-serif; font-size: 28px; font-weight: 900; }
.pilot-timeline strong { display: block; margin-top: 34px; font-size: 14px; }
.pilot-timeline p { color: var(--muted); font-size: 12px; }
.pilot-output { grid-column: 2; display: grid; grid-template-columns: 180px 1fr; border-top: 1px solid var(--line); padding-top: 20px; }
.pilot-output p { font-weight: 900; }
.pilot-output ul { margin: 0; padding: 0; display: flex; gap: 8px; flex-wrap: wrap; list-style: none; }
.pilot-output li { padding: 8px 10px; border: 1px solid var(--line); font-size: 12px; }

.network { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; align-items: stretch; }
.network-photo { min-height: 600px; }
.network-photo img { width: 100%; height: 100%; object-fit: cover; }
.network-copy { padding: 50px 0; }
.network-copy h2 { margin: 0 0 38px; font-size: 45px; line-height: 1.28; }
.network-roles > div { display: grid; grid-template-columns: 36px 110px 1fr; align-items: center; padding: 18px 0; border-top: 1px solid rgba(255,255,255,.15); }
.network-roles svg { color: var(--gold); width: 22px; height: 22px; }
.network-roles span { color: rgba(255,255,255,.58); font-size: 13px; }
.boundary { margin-top: 32px; padding: 18px 20px; border-left: 4px solid var(--gold); background: rgba(255,255,255,.06); color: #fff; font-weight: 800; }

.contact { display: grid; grid-template-columns: 1fr 1fr; gap: 90px; }
.contact-copy h2 { margin: 0 0 24px; font-size: 45px; line-height: 1.28; }
.contact-copy > p:not(.eyebrow) { max-width: 600px; color: var(--muted); }
.contact-details { margin-top: 32px; display: grid; gap: 10px; }
.contact-details a { display: flex; gap: 10px; align-items: center; text-decoration: none; font-weight: 800; }
.contact-details svg { width: 18px; color: var(--purple); }
.contact-qr { display: flex; align-items: center; gap: 16px; width: fit-content; margin-top: 28px; padding: 12px 16px 12px 12px; background: #fff; border: 1px solid var(--line); border-left: 4px solid var(--purple); }
.contact-qr img { width: 92px; height: 92px; flex: 0 0 auto; object-fit: contain; }
.contact-qr strong, .contact-qr span { display: block; }
.contact-qr strong { margin-bottom: 9px; font-size: 13px; }
.contact-qr span { margin-top: 5px; color: var(--muted); font-size: 11px; }
.contact-form { padding: 32px; background: var(--soft); border-top: 4px solid var(--purple); display: grid; gap: 18px; }
.contact-form label { display: grid; gap: 7px; font-size: 13px; font-weight: 800; }
.contact-form input, .contact-form select, .contact-form textarea { width: 100%; border: 1px solid #bfb9c1; border-radius: 4px; background: #fff; padding: 12px; color: var(--ink); }
.contact-form textarea { resize: vertical; }
.form-result { padding: 16px; background: #e4f2ed; border-left: 4px solid var(--green); font-size: 13px; white-space: pre-line; }

.site-footer { padding: 42px max(24px, calc((100vw - var(--max))/2)); display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 40px; background: var(--ink); color: rgba(255,255,255,.68); font-size: 12px; align-items: end; }
.site-footer img { width: 125px; filter: brightness(0) invert(1); }
.footer-links { display: grid; gap: 4px; text-align: right; }
.footer-links a { text-decoration: none; }

@media (max-width: 1050px) {
  .desktop-nav { display: none; }
  .menu-toggle { display: inline-flex; }
  .hero h1 { font-size: 54px; }
  .statement, .translation, .pilot, .contact { grid-template-columns: 1fr; gap: 44px; }
  .pilot-output { grid-column: 1; }
  .layer-flow { grid-template-columns: 1fr; gap: 12px; }
  .flow-arrow { transform: rotate(90deg); height: 24px; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .case-grid { grid-template-columns: 1fr 1fr; }
  .case-featured { grid-column: 1 / -1; }
  .network { grid-template-columns: .8fr 1.2fr; gap: 40px; }
}

@media (max-width: 720px) {
  .site-header { padding: 0 16px; height: 66px; }
  .header-actions .button-small { display: none; }
  .mobile-nav { inset: 66px 0 0; }
  .brand img { width: 110px; }
  .hero { min-height: 720px; height: 88vh; align-items: flex-start; padding-top: 148px; }
  .hero-overlay { background: rgba(18,15,20,.82); }
  .hero-content { width: calc(100% - 32px); margin: 0 auto; }
  .hero h1 { font-size: 40px; }
  .hero-copy { font-size: 16px; }
  .hero-proof { left: 16px; right: 16px; grid-template-columns: repeat(3, 1fr); }
  .hero-proof div { padding: 14px 10px; }
  .hero-proof strong { font-size: 22px; }
  .section { width: calc(100% - 32px); padding: 72px 0; }
  .section-dark, .section-ink { width: 100%; padding-left: 16px; padding-right: 16px; }
  .section-intro h2, .section-heading h2, .network-copy h2, .contact-copy h2 { font-size: 34px; }
  .statement { align-items: start; }
  .translation-track { grid-template-columns: repeat(2, 1fr); }
  .product-grid { grid-template-columns: 1fr; }
  .school-list article { grid-template-columns: 110px 1fr; gap: 18px; }
  .school-photo { height: 100px; }
  .school-list article > div:last-child { grid-template-columns: 38px 1fr; }
  .school-list h3 { font-size: 21px; }
  .evidence-heading { grid-template-columns: 1fr; gap: 20px; }
  .case-grid { grid-template-columns: 1fr; }
  .case-featured { grid-column: auto; }
  .case img, .case-featured img { height: 230px; }
  .evidence-index { overflow-x: auto; }
  .evidence-index span { min-width: 115px; }
  .pilot-timeline { grid-template-columns: 1fr; }
  .pilot-timeline article { min-height: 110px; display: grid; grid-template-columns: 50px 1fr 70px; align-items: center; }
  .pilot-timeline strong { margin: 0; }
  .pilot-timeline p { text-align: right; }
  .pilot-output { grid-template-columns: 1fr; }
  .network { grid-template-columns: 1fr; gap: 16px; }
  .network-photo { min-height: 330px; }
  .network-roles > div { grid-template-columns: 34px 1fr; }
  .network-roles span { grid-column: 2; }
  .contact-form { padding: 22px; }
  .contact-qr { width: 100%; padding-right: 12px; }
  .contact-qr img { width: 78px; height: 78px; }
  .site-footer { grid-template-columns: 1fr; text-align: left; }
  .footer-links { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}