:root {
  --graphite: #111318;
  --graphite-2: #1b1e25;
  --ice: #f4f7f8;
  --paper: #ffffff;
  --blue: #1647d8;
  --blue-deep: #0c277f;
  --amber: #f2aa21;
  --mist: #bcc3cc;
  --ink: #16181d;
  --muted: #626873;
  --line: rgba(17, 19, 24, .18);
  --line-light: rgba(244, 247, 248, .2);
  --sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
  --serif: "Songti SC", STSong, "Noto Serif CJK SC", serif;
  --max: 1680px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 78px; -webkit-text-size-adjust: 100%; }
body { margin: 0; color: var(--ink); background: var(--ice); font-family: var(--sans); font-size: 16px; line-height: 1.72; }
body.menu-open { overflow: hidden; }
img { display: block; width: 100%; max-width: 100%; }
h1, h2, h3, p, dl, dd, figure { margin: 0; }
button, a { font: inherit; }
a { color: inherit; }
section { scroll-margin-top: 78px; }
::selection { color: var(--graphite); background: var(--amber); }
:focus-visible { outline: 3px solid var(--amber); outline-offset: 4px; }

.page-shell { width: min(100% - 64px, var(--max)); margin: 0 auto; }
.site-header { position: sticky; top: 0; z-index: 50; color: var(--ice); background: rgba(17, 19, 24, .96); border-bottom: 1px solid var(--line-light); backdrop-filter: blur(16px); }
.header-inner { width: min(100% - 64px, var(--max)); min-height: 78px; margin: 0 auto; display: flex; align-items: stretch; justify-content: space-between; gap: 32px; }
.brand-lockup { min-width: 290px; display: flex; align-items: center; gap: 14px; }
.brand-lockup img { width: 42px; height: 42px; object-fit: contain; }
.brand-lockup div { display: grid; }
.brand-lockup strong { font-size: 1.16rem; font-weight: 900; letter-spacing: .12em; line-height: 1.2; }
.brand-lockup span { margin-top: 4px; color: var(--mist); font-size: .75rem; font-weight: 800; letter-spacing: .14em; }
.primary-nav { display: flex; align-items: stretch; }
.primary-nav a { position: relative; display: flex; align-items: center; padding: 0 14px; color: #c7cbd2; font-size: .875rem; font-weight: 750; text-decoration: none; white-space: nowrap; transition: color .2s ease, background-color .2s ease; }
.primary-nav a::after { content: ""; position: absolute; right: 14px; bottom: 0; left: 14px; height: 3px; background: transparent; }
.primary-nav a:hover, .primary-nav a.is-active, .primary-nav a[aria-current] { color: var(--paper); background: rgba(22, 71, 216, .25); }
.primary-nav a.is-active::after, .primary-nav a[aria-current]::after { background: var(--amber); }
.menu-toggle { display: none; }

.hero { position: relative; overflow: hidden; color: var(--ice); background: var(--graphite); }
.hero-grid { position: absolute; inset: 0; opacity: .22; background-image: linear-gradient(to right, transparent calc(8.333% - .5px), rgba(244,247,248,.18) 8.333%, transparent calc(8.333% + .5px)), linear-gradient(to bottom, transparent calc(33.333% - .5px), rgba(244,247,248,.16) 33.333%, transparent calc(33.333% + .5px)); background-size: 8.333% 100%, 100% 33.333%; }
.hero-shell { position: relative; z-index: 1; width: min(100% - 64px, var(--max)); min-height: calc(100vh - 78px); margin: 0 auto; display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); grid-template-rows: minmax(540px, 1fr) 230px; border-right: 1px solid var(--line-light); border-left: 1px solid var(--line-light); }
.hero-coordinate { grid-column: 1; grid-row: 1 / 3; padding: 38px 18px; border-right: 1px solid var(--line-light); display: flex; flex-direction: column; align-items: center; gap: 29px; color: #9fa6b2; font-size: .75rem; letter-spacing: .08em; writing-mode: vertical-rl; }
.hero-coordinate span { color: var(--amber); font-weight: 900; }
.hero-coordinate em { margin-top: auto; color: var(--paper); font-style: normal; font-weight: 800; }
.hero-copy { grid-column: 2 / span 7; grid-row: 1; align-self: center; padding: 58px 5vw 58px 4vw; }
.breadcrumb { margin-bottom: 34px; display: flex; align-items: center; gap: 10px; color: #aeb4bf; font-size: .8rem; font-weight: 750; letter-spacing: .08em; }
.breadcrumb b { color: var(--amber); }
.eyebrow, .kicker { color: var(--blue); font-size: .8rem; font-weight: 900; letter-spacing: .18em; text-transform: uppercase; }
.hero .eyebrow { color: var(--amber); }
.display-mark { margin-top: 26px; color: var(--paper); font-size: clamp(6.8rem, 11vw, 12.5rem); font-weight: 950; line-height: .82; letter-spacing: -.09em; white-space: nowrap; }
.hero h1 { max-width: 850px; margin-top: 46px; font-size: clamp(2.15rem, 3.5vw, 3.6rem); font-weight: 850; line-height: 1.16; letter-spacing: -.045em; }
.hero-slogan { margin-top: 25px; color: #c0c5cf; font-family: var(--serif); font-size: clamp(1.2rem, 1.7vw, 1.65rem); }
.signal-cards { grid-column: 9 / span 4; grid-row: 1; display: grid; grid-template-columns: 1fr 1fr; align-content: center; border-left: 1px solid var(--line-light); }
.signal-cards article { min-height: 190px; padding: 27px; border-right: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); display: flex; flex-direction: column; }
.signal-cards article:nth-child(-n + 2) { border-top: 1px solid var(--line-light); }
.signal-cards span { color: var(--amber); font-family: Georgia, serif; font-size: 1.45rem; }
.signal-cards b { margin-top: auto; font-size: .9rem; }
.signal-cards p { margin-top: 6px; color: #9da4b0; font-size: .8rem; }
.hero-slice { position: relative; grid-column: 2 / span 11; grid-row: 2; overflow: hidden; border-top: 1px solid var(--line-light); }
.hero-slice::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(17,19,24,.62), transparent 42%, rgba(22,71,216,.26)); pointer-events: none; }
.hero-slice img { height: 100%; object-fit: cover; }
.hero-slice span { position: absolute; right: 20px; bottom: 17px; z-index: 2; padding: 8px 11px; color: var(--graphite); background: var(--amber); font-size: .75rem; font-weight: 900; letter-spacing: .12em; }
.hero-status { position: relative; z-index: 2; min-height: 68px; padding: 15px max(32px, calc((100vw - min(100vw - 64px, var(--max))) / 2)); display: grid; grid-template-columns: 12px auto 1fr; gap: 16px; align-items: center; color: var(--graphite); background: var(--amber); }
.status-dot { width: 10px; height: 10px; border: 2px solid var(--graphite); border-radius: 50%; background: transparent; }
.hero-status b { font-size: .875rem; }
.hero-status p { justify-self: end; font-size: .8rem; font-weight: 700; }

.section-code { color: #7a808a; font-family: Georgia, serif; font-size: .8rem; font-weight: 700; letter-spacing: .12em; }
.section-code.light { color: #9fa6b3; }
.identity-section { padding: 128px 0 136px; background: var(--paper); }
.identity-head { display: grid; grid-template-columns: 2fr 5fr 5fr; gap: 4vw; align-items: start; }
.identity-head h2, .map-copy h2, .selection-head h2, .channel-head h2, .collections-copy h2, .updates-head h2, .access-title h2, .faq-layout h2, .trust-title h2 { margin-top: 16px; font-size: clamp(2.55rem, 4vw, 4.8rem); font-weight: 790; line-height: 1.13; letter-spacing: -.055em; }
.identity-lead { padding-top: 42px; color: var(--muted); font-size: 1.05rem; }
.identity-ledger { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 80px; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.identity-ledger article { min-height: 230px; padding: 28px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.identity-ledger span { color: var(--blue); font-size: .8rem; font-weight: 900; letter-spacing: .14em; }
.identity-ledger h3 { margin-top: 64px; font-size: 1.28rem; }
.identity-ledger p { margin-top: 8px; color: var(--muted); }

.map-section { padding: 130px 0; color: var(--ice); background: var(--blue-deep); }
.map-layout { display: grid; grid-template-columns: 5fr 4fr 3fr; gap: 4vw; align-items: center; }
.map-copy > p:nth-of-type(3) { margin-top: 28px; color: #c6cde0; }
.map-copy h2 { max-width: 720px; }
.scope-list { margin-top: 47px; border-top: 1px solid var(--line-light); }
.scope-list div { display: grid; grid-template-columns: 52px 1fr; gap: 18px; padding: 20px 0; border-bottom: 1px solid var(--line-light); }
.scope-list dt { color: var(--amber); font-family: Georgia, serif; }
.scope-list dd { display: grid; gap: 3px; }
.scope-list b { font-size: .96rem; }
.scope-list span { color: #aeb7d0; font-size: .83rem; }
.radar { position: relative; aspect-ratio: 1; border: 1px solid var(--line-light); background-image: linear-gradient(to right, transparent 49.8%, rgba(244,247,248,.2) 50%, transparent 50.2%), linear-gradient(to bottom, transparent 49.8%, rgba(244,247,248,.2) 50%, transparent 50.2%); }
.radar-ring { position: absolute; top: 50%; left: 50%; border: 1px solid rgba(244,247,248,.25); border-radius: 50%; transform: translate(-50%, -50%); }
.radar-ring.r1 { width: 82%; height: 82%; }.radar-ring.r2 { width: 58%; height: 58%; }.radar-ring.r3 { width: 32%; height: 32%; }
.radar::before, .radar::after { content: ""; position: absolute; top: 50%; left: 50%; width: 76%; height: 1px; background: rgba(242,170,33,.48); transform-origin: center; }
.radar::before { transform: translate(-50%, -50%) rotate(35deg); }.radar::after { transform: translate(-50%, -50%) rotate(-50deg); }
.radar-core { position: absolute; top: 50%; left: 50%; z-index: 2; width: 150px; height: 150px; display: grid; place-content: center; text-align: center; border: 1px solid var(--amber); border-radius: 50%; background: var(--blue-deep); transform: translate(-50%, -50%); }
.radar-core small { color: var(--amber); font-size: .75rem; letter-spacing: .1em; }
.node { position: absolute; z-index: 2; padding: 6px 10px; color: var(--graphite); background: var(--amber); font-size: .75rem; font-weight: 850; }
.n1 { top: 8%; left: 42%; }.n2 { top: 29%; right: 2%; }.n3 { right: 13%; bottom: 11%; }.n4 { bottom: 6%; left: 26%; }.n5 { top: 46%; left: 2%; }.n6 { top: 16%; left: 12%; }
.map-visual { aspect-ratio: 1; overflow: hidden; clip-path: polygon(0 0, 86% 0, 100% 14%, 100% 100%, 14% 100%, 0 86%); }
.map-visual img { height: 100%; object-fit: cover; }

.selection-section { padding: 132px 0 145px; background: var(--ice); }
.selection-head { display: grid; grid-template-columns: 7fr 5fr; gap: 7vw; align-items: end; }
.selection-head > p { color: var(--muted); }
.film-stack { margin-top: 76px; display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.film-entry { min-width: 0; color: var(--ink); background: var(--paper); border: 1px solid var(--line); }
.film-entry.wide { grid-column: 1 / 3; min-height: 660px; display: grid; grid-template-columns: 7fr 5fr; }
.film-entry:not(.wide) { display: grid; grid-template-rows: 350px auto; }
.film-entry figure { position: relative; overflow: hidden; background: var(--mist); }
.film-entry figure img { height: 100%; object-fit: cover; }
.film-entry figure span { position: absolute; top: 0; left: 0; padding: 9px 13px; color: var(--paper); background: var(--blue); font-size: .75rem; font-weight: 900; letter-spacing: .12em; }
.film-copy { padding: clamp(30px, 4.3vw, 72px); }
.film-index { color: var(--blue); font-size: .8rem; font-weight: 900; letter-spacing: .16em; }
.film-copy h3 { margin-top: 18px; font-family: var(--serif); font-size: clamp(2.45rem, 4vw, 4.5rem); font-weight: 600; line-height: 1.1; }
.film-copy dl { display: grid; grid-template-columns: 1fr 1fr; margin-top: 40px; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.film-copy dl div { min-height: 126px; padding: 18px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.film-copy dt { color: var(--muted); font-size: .8rem; font-weight: 800; }
.film-copy dd { margin-top: 8px; font-size: .9rem; font-weight: 700; }
.film-entry:not(.wide) .film-copy { padding: 36px; }
.film-entry:not(.wide) .film-copy h3 { font-size: clamp(2.35rem, 3vw, 3.7rem); }

.channel-section { padding: 132px 0 140px; color: var(--ice); background: var(--graphite); }
.channel-head { display: grid; grid-template-columns: 2fr 5fr 5fr; gap: 4vw; }
.channel-head > p:last-child { padding-top: 42px; color: #abb1bc; }
.channel-matrix { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 75px; border-top: 1px solid var(--line-light); border-left: 1px solid var(--line-light); }
.channel-matrix article { position: relative; min-height: 300px; padding: 29px; border-right: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); display: flex; flex-direction: column; }
.channel-matrix article.primary { color: var(--graphite); background: var(--amber); }
.channel-matrix span { color: var(--amber); font-family: Georgia, serif; font-size: 1.35rem; }.channel-matrix .primary span { color: var(--blue-deep); }
.channel-matrix h3 { margin-top: 52px; font-size: 1.55rem; }
.channel-matrix p { margin-top: 13px; color: #aeb4be; }.channel-matrix .primary p { color: #403713; }
.channel-matrix b { margin-top: auto; color: #858d99; font-size: .75rem; letter-spacing: .13em; }.channel-matrix .primary b { color: #5c4d14; }
.genre-strip { display: grid; grid-template-columns: repeat(8, 1fr); margin-top: 24px; border-top: 1px solid var(--line-light); border-left: 1px solid var(--line-light); }
.genre-strip span { min-height: 84px; display: grid; place-content: center; border-right: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); font-weight: 800; }

.collections-section { padding: 132px 0; background: var(--blue); }
.collections-layout { display: grid; grid-template-columns: 4fr 8fr; gap: 7vw; align-items: center; }
.archive-image { position: relative; min-height: 760px; overflow: hidden; clip-path: polygon(0 0, 88% 0, 100% 10%, 100% 100%, 12% 100%, 0 90%); background: var(--graphite); }
.archive-image img { height: 100%; min-height: 760px; object-fit: cover; }
.archive-image span { position: absolute; right: 20px; bottom: 18px; padding: 8px 11px; color: var(--graphite); background: var(--amber); font-size: .75rem; font-weight: 900; }
.collections-copy { color: var(--ice); }
.collections-copy .kicker { color: var(--amber); }
.collections-lead { max-width: 850px; margin-top: 28px; color: #c7d4ff; font-size: 1.05rem; }
.study-list { margin-top: 55px; border-top: 1px solid rgba(244,247,248,.35); }
.study-list article { display: grid; grid-template-columns: 115px 2fr 3fr; gap: 24px; padding: 27px 0; border-bottom: 1px solid rgba(244,247,248,.28); }
.study-list span { color: var(--amber); font-size: .75rem; font-weight: 900; letter-spacing: .12em; }
.study-list h3 { font-size: 1.28rem; }
.study-list p { color: #c7d4ff; font-size: .9rem; }

.updates-section { padding: 132px 0 145px; background: var(--paper); }
.updates-head { display: grid; grid-template-columns: 7fr 5fr; gap: 7vw; align-items: end; }
.updates-head > p { color: var(--muted); }
.timeline-layout { margin-top: 75px; display: grid; grid-template-columns: 4fr 8fr; gap: 5vw; }
.timeline-layout figure { min-height: 540px; overflow: hidden; }
.timeline-layout figure img { height: 100%; min-height: 540px; object-fit: cover; }
.timeline { position: relative; border-top: 1px solid var(--ink); }
.timeline::before { content: ""; position: absolute; top: 0; bottom: 0; left: 140px; width: 1px; background: var(--line); }
.timeline article { position: relative; display: grid; grid-template-columns: 120px 1fr; gap: 20px; padding: 28px 0 34px; border-bottom: 1px solid var(--line); }
.timeline article::before { content: ""; position: absolute; top: 36px; left: 134px; width: 13px; height: 13px; border: 2px solid var(--blue); border-radius: 50%; background: var(--paper); }
.timeline time { color: var(--blue); font-family: Georgia, serif; font-weight: 700; }
.timeline span, .timeline h3, .timeline p { grid-column: 2; }
.timeline span { color: var(--blue); font-size: .75rem; font-weight: 900; letter-spacing: .12em; }
.timeline h3 { margin-top: -11px; font-size: 1.3rem; }
.timeline p { margin-top: -10px; color: var(--muted); font-size: .9rem; }

.access-section { padding: 132px 0; color: var(--ice); background: var(--blue-deep); }
.access-layout { display: grid; grid-template-columns: 4fr 8fr; gap: 6vw; }
.access-title { position: sticky; top: 120px; align-self: start; }
.access-title .kicker { color: var(--amber); }
.access-title > p:last-child { margin-top: 28px; color: #b8c1da; }
.access-nodes { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line-light); border-left: 1px solid var(--line-light); }
.access-nodes article { min-height: 330px; padding: 28px; border-right: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); display: flex; flex-direction: column; }
.access-nodes span { color: var(--amber); font-size: .8rem; font-weight: 900; letter-spacing: .13em; }
.access-nodes h3 { margin-top: 52px; font-size: 1.45rem; }
.access-nodes p { margin-top: 14px; color: #b8c1da; }
.access-nodes b { margin-top: auto; padding-top: 25px; font-size: .8rem; }
.access-nodes .amber { color: var(--graphite); background: var(--amber); }
.access-nodes .amber span, .access-nodes .amber p { color: #534616; }

.faq-section { padding: 132px 0; background: var(--ice); }
.faq-layout { display: grid; grid-template-columns: 4fr 8fr; gap: 8vw; }
.faq-lead { margin-top: 25px; color: var(--muted); }
.faq-list { border-top: 1px solid var(--ink); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { position: relative; padding: 25px 48px 25px 0; cursor: pointer; list-style: none; font-size: 1.06rem; font-weight: 780; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; top: 21px; right: 2px; color: var(--blue); font-size: 1.65rem; line-height: 1; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { max-width: 920px; padding: 0 54px 24px 0; color: var(--muted); }

.trust-section { position: relative; overflow: hidden; padding: 132px 0 118px; color: var(--ice); background: var(--graphite); }
.trust-bg { position: absolute; inset: 0; opacity: .1; background: url("https://lanshu-vista.cdn.bcebos.com/backgrounds/21x9/1960x840/0031.webp") center/cover no-repeat; }
.trust-layout, .source-grid { position: relative; }
.trust-layout { display: grid; grid-template-columns: 5fr 7fr; gap: 7vw; }
.trust-title .kicker { color: var(--amber); }
.trust-title > p:last-child { margin-top: 28px; color: #aeb4be; }
.trust-ledger { border-top: 1px solid var(--line-light); }
.trust-ledger div { display: grid; grid-template-columns: 170px 1fr; gap: 25px; padding: 18px 0; border-bottom: 1px solid var(--line-light); }
.trust-ledger dt { color: var(--amber); font-size: .8rem; font-weight: 850; }
.trust-ledger dd { font-weight: 700; }
.source-grid { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 75px; border-top: 1px solid var(--line-light); border-left: 1px solid var(--line-light); }
.source-grid article { min-height: 245px; padding: 28px; border-right: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); }
.source-grid span { color: var(--amber); font-family: Georgia, serif; font-size: 1.35rem; }
.source-grid h3 { margin-top: 42px; font-size: 1.3rem; }
.source-grid p { margin-top: 13px; color: #aeb4be; font-size: .9rem; }

.site-footer { color: var(--ice); background: #08090d; }
.footer-inner { width: min(100% - 64px, var(--max)); margin: 0 auto; padding: 52px 0; display: grid; grid-template-columns: 2fr 1.3fr 2fr 3fr; gap: 32px; align-items: end; }
.footer-brand { display: grid; }
.footer-brand strong { font-size: 1.45rem; }
.footer-brand span { color: #7f8793; font-size: .75rem; font-weight: 850; letter-spacing: .14em; }
.footer-inner p { color: #a3a9b3; font-size: .8rem; }

@media (max-width: 1280px) {
  .page-shell, .header-inner, .hero-shell, .footer-inner { width: min(100% - 44px, var(--max)); }
  .brand-lockup { min-width: 225px; }
  .primary-nav a { padding: 0 9px; font-size: .78rem; }
  .primary-nav a::after { right: 9px; left: 9px; }
  .hero-copy { grid-column: 2 / span 6; }
  .signal-cards { grid-column: 8 / span 5; }
  .map-layout { grid-template-columns: 5fr 4fr 3fr; gap: 3vw; }
  .radar-core { width: 125px; height: 125px; }
  .film-entry:not(.wide) .film-copy dl { grid-template-columns: 1fr; }
}

@media (max-width: 980px) {
  html { scroll-padding-top: 70px; }
  .header-inner { min-height: 70px; align-items: center; }
  .brand-lockup img { width: 36px; height: 36px; }
  .brand-lockup span { font-size: .75rem; }
  .menu-toggle { position: relative; width: 46px; height: 46px; margin-left: auto; padding: 12px 10px; border: 1px solid var(--line-light); background: transparent; display: grid; align-content: center; gap: 7px; cursor: pointer; }
  .menu-toggle span { width: 100%; height: 2px; background: var(--ice); transition: transform .2s ease; }
  .menu-toggle b { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(4.5px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:nth-child(2) { transform: translateY(-4.5px) rotate(-45deg); }
  .js .primary-nav { position: fixed; top: 70px; right: 0; left: 0; min-height: calc(100vh - 70px); padding: 28px 22px; background: var(--graphite); display: none; flex-direction: column; align-items: stretch; }
  .js .primary-nav.is-open { display: flex; }
  .primary-nav a { min-height: 56px; padding: 0 4px; border-bottom: 1px solid var(--line-light); font-size: 1rem; }
  .primary-nav a::after { display: none; }
  .hero-shell { min-height: 850px; grid-template-columns: repeat(8, minmax(0, 1fr)); grid-template-rows: auto 210px; }
  .hero-coordinate { grid-column: 1; }
  .hero-copy { grid-column: 2 / span 4; padding: 50px 30px; }
  .display-mark { font-size: clamp(5.4rem, 14vw, 8.5rem); white-space: normal; }
  .signal-cards { grid-column: 6 / span 3; }
  .signal-cards { grid-template-columns: 1fr; }
  .signal-cards article { min-height: 125px; }
  .signal-cards article:nth-child(n) { border-top: 0; }
  .signal-cards article:first-child { border-top: 1px solid var(--line-light); }
  .hero-slice { grid-column: 2 / span 7; }
  .hero-status { grid-template-columns: 12px 1fr; }
  .hero-status p { grid-column: 2; justify-self: start; }
  .identity-head, .channel-head { grid-template-columns: 2fr 6fr; }
  .identity-lead, .channel-head > p:last-child { grid-column: 3 / span 1; padding-top: 0; }
  .identity-ledger { grid-template-columns: 1fr 1fr; }
  .map-layout { grid-template-columns: 1fr 1fr; }
  .map-copy { grid-column: 1 / 3; }
  .map-visual { max-width: 420px; }
  .film-entry.wide { grid-template-columns: 1fr; }
  .film-entry.wide figure { min-height: 460px; }
  .film-entry:not(.wide) { grid-template-rows: 300px auto; }
  .channel-matrix { grid-template-columns: 1fr 1fr; }
  .genre-strip { grid-template-columns: repeat(4, 1fr); }
  .collections-layout, .access-layout, .faq-layout, .trust-layout { grid-template-columns: 1fr; gap: 60px; }
  .archive-image { max-width: 680px; min-height: 650px; }
  .archive-image img { min-height: 650px; }
  .access-title { position: static; }
  .timeline-layout { grid-template-columns: 1fr; }
  .timeline-layout figure { min-height: 430px; }
  .timeline-layout figure img { min-height: 430px; }
  .source-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 680px) {
  html { scroll-padding-top: 64px; }
  .page-shell, .header-inner, .hero-shell, .footer-inner { width: min(100% - 28px, var(--max)); }
  .header-inner { min-height: 64px; }
  .brand-lockup { min-width: 0; }
  .brand-lockup img { width: 32px; height: 32px; }
  .brand-lockup strong { font-size: 1rem; }
  .brand-lockup span { display: none; }
  .js .primary-nav { top: 64px; min-height: calc(100vh - 64px); padding: 24px 14px; }
  .hero-shell { display: flex; flex-direction: column; min-height: auto; }
  .hero-coordinate { order: 1; padding: 18px 0; border-right: 0; border-bottom: 1px solid var(--line-light); flex-direction: row; justify-content: space-between; writing-mode: initial; }
  .hero-coordinate b:nth-of-type(2), .hero-coordinate em { display: none; }
  .hero-copy { order: 2; padding: 48px 0; }
  .breadcrumb { margin-bottom: 26px; }
  .display-mark { font-size: 22vw; }
  .hero h1 { margin-top: 38px; font-size: 2.2rem; }
  .hero-slogan { font-size: 1.2rem; }
  .signal-cards { order: 3; display: grid; grid-template-columns: 1fr 1fr; border-left: 1px solid var(--line-light); }
  .signal-cards article { min-height: 145px; }
  .signal-cards article:nth-child(n) { border-top: 0; }
  .signal-cards article:nth-child(-n + 2) { border-top: 1px solid var(--line-light); }
  .hero-slice { order: 4; min-height: 190px; }
  .hero-status { padding: 17px 18px; }
  .identity-section, .map-section, .selection-section, .channel-section, .collections-section, .updates-section, .access-section, .faq-section, .trust-section { padding: 86px 0; }
  .identity-head, .channel-head, .selection-head, .updates-head { grid-template-columns: 1fr; gap: 25px; }
  .identity-head > *, .channel-head > *, .selection-head > *, .updates-head > * { grid-column: auto; }
  .identity-lead, .channel-head > p:last-child { padding-top: 0; }
  .identity-head h2, .map-copy h2, .selection-head h2, .channel-head h2, .collections-copy h2, .updates-head h2, .access-title h2, .faq-layout h2, .trust-title h2 { font-size: 2.55rem; }
  .identity-ledger { grid-template-columns: 1fr; margin-top: 52px; }
  .identity-ledger article { min-height: 190px; }
  .map-layout { grid-template-columns: 1fr; }
  .map-copy { grid-column: auto; }
  .radar { margin-top: 30px; }
  .map-visual { max-width: none; margin-top: 22px; }
  .film-stack { grid-template-columns: 1fr; margin-top: 48px; }
  .film-entry.wide { grid-column: auto; min-height: auto; }
  .film-entry.wide figure { min-height: 310px; }
  .film-entry:not(.wide) { grid-template-rows: 280px auto; }
  .film-copy, .film-entry:not(.wide) .film-copy { padding: 27px 20px; }
  .film-copy dl { grid-template-columns: 1fr; }
  .film-copy dl div { min-height: auto; }
  .film-copy h3, .film-entry:not(.wide) .film-copy h3 { font-size: 2.55rem; }
  .channel-matrix { grid-template-columns: 1fr; margin-top: 50px; }
  .channel-matrix article { min-height: 260px; }
  .genre-strip { grid-template-columns: 1fr 1fr; }
  .archive-image { min-height: 520px; }
  .archive-image img { min-height: 520px; }
  .study-list article { grid-template-columns: 1fr; gap: 8px; }
  .timeline-layout { margin-top: 48px; }
  .timeline-layout figure { min-height: 300px; }
  .timeline-layout figure img { min-height: 300px; }
  .timeline::before { left: 0; }
  .timeline article { grid-template-columns: 1fr; padding-left: 28px; }
  .timeline article::before { top: 34px; left: -6px; }
  .timeline span, .timeline h3, .timeline p { grid-column: 1; }
  .timeline h3, .timeline p { margin-top: 0; }
  .access-nodes { grid-template-columns: 1fr; }
  .access-nodes article { min-height: 310px; }
  .trust-ledger div { grid-template-columns: 1fr; gap: 5px; }
  .source-grid { margin-top: 52px; }
  .footer-inner { grid-template-columns: 1fr; gap: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}