:root {
    --bg: #0C0B0A;
    --bg-deep: #161311;
    --surface: #1C1916;
    --surface-2: #26221D;
    --paper: #F3E6D2;
    --title: #FFF8F0;
    --text: #EDE4D8;
    --muted: #B7A898;
    --soft: #8A7B6C;
    --red: #E11D2E;
    --red-bright: #FF4A4F;
    --wine: #8B1E2D;
    --rust: #E25A2A;
    --amber: #E2B14A;
    --line: rgba(226,177,74,0.16);
    --line-strong: rgba(225,29,46,0.40);
    --shadow: 0 18px 44px rgba(0,0,0,0.46);
    --footer: #080706;
    --footer-text: #D8CBBA;
    --max: 1280px;
    --read: 780px;
    --header-h: 80px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }
body {
    margin: 0;
    min-width: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.8;
    overflow-wrap: anywhere;
}
body.layer-open { position: fixed; left: 0; right: 0; width: 100%; overflow: hidden; }
a { color: inherit; text-decoration: none; }
a, button, input { font: inherit; }
button { color: inherit; }
img { display: block; max-width: 100%; height: auto; }
figure { margin: 0; }
[hidden] { display: none !important; pointer-events: none !important; }
.shell { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; min-width: 0; }
.site-main { min-width: 0; }
section[id], article[id], h2[id], h3[id] { scroll-margin-top: calc(var(--header-h) + 28px); }

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(12,11,10,0.96);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(10px);
}
.brand-bar { min-height: var(--header-h); display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand-link, .footer-brand, .layer-brand { display: inline-flex; align-items: center; min-width: 0; gap: 12px; }
.brand-link { min-height: 56px; }
.brand-logo { display: block; width: auto; height: clamp(28px, 3vw, 36px); max-width: 170px; object-fit: contain; object-position: center; flex: 0 0 auto; }
.brand-logo-text { display: inline-flex; align-items: center; min-height: 36px; font-weight: 850; letter-spacing: .08em; color: var(--title); }
.brand-copy, .footer-brand span, .layer-brand span { min-width: 0; display: grid; line-height: 1.15; }
.brand-copy strong, .footer-brand strong, .layer-brand strong { color: var(--title); font-size: 19px; letter-spacing: .06em; }
.brand-copy small, .footer-brand small, .layer-brand small { color: var(--muted); font-size: 10px; letter-spacing: .16em; margin-top: 5px; }
.desktop-header-actions { display: flex; align-items: center; gap: 10px; }
.mobile-header-actions { display: none; align-items: center; gap: 6px; }
.header-action, .header-brief-link, .layer-close {
    min-height: 44px; min-width: 44px; display: inline-flex; align-items: center; justify-content: center;
    border: 1px solid var(--line); background: transparent; color: var(--paper); padding: 8px 14px; border-radius: 8px; cursor: pointer;
}
.header-brief-link { border-color: var(--line-strong); }
.header-action:hover, .header-brief-link:hover, .layer-close:hover { border-color: var(--red-bright); color: var(--title); }

.channel-nav { background: var(--bg-deep); border-bottom: 1px solid var(--line); }
.channel-nav-desktop { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); padding-block: 16px; }
.channel-group { min-width: 0; padding: 0 24px; border-right: 1px solid var(--line); }
.channel-group:first-child { padding-left: 0; }
.channel-group:last-child { padding-right: 0; border-right: 0; }
.channel-group h2 { margin: 0 0 8px; color: var(--soft); font-size: 12px; letter-spacing: .16em; font-weight: 700; }
.channel-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 4px 16px; }
.channel-links a, .channel-nav-mobile a, .footer-group a { position: relative; min-height: 44px; display: flex; align-items: center; color: var(--muted); }
.channel-links a.is-current, .channel-nav-mobile a.is-current, .footer-group a.is-current { color: var(--title); font-weight: 700; }
.channel-links a.is-current::before, .channel-nav-mobile a.is-current::before, .footer-group a.is-current::before {
    content: ""; width: 4px; height: 14px; margin-right: 8px; border-radius: 2px; background: var(--red); flex: 0 0 auto; pointer-events: none;
}
.channel-links a:hover, .footer-group a:hover { color: var(--title); }
.channel-nav-mobile { display: none; }

.page-shell { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; padding-block: 36px 64px; }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; color: var(--soft); font-size: 14px; margin-bottom: 20px; }
.breadcrumb a { min-height: 44px; display: inline-flex; align-items: center; }
.breadcrumb a:hover { color: var(--paper); }
.page-kicker, .eyebrow { margin: 0 0 10px; color: var(--amber); font-size: 13px; letter-spacing: .12em; font-weight: 750; }
h1, h2, h3 { color: var(--title); line-height: 1.28; overflow-wrap: anywhere; }
h1 { margin: 0; font-size: clamp(28px, 4vw, 32px); letter-spacing: -.02em; }
h2 { font-size: clamp(21px, 3vw, 26px); margin: 0 0 16px; }
h3 { font-size: 18px; margin: 0 0 9px; }
p { margin: 0 0 1em; }
.lead { max-width: 860px; margin-top: 18px; color: var(--paper); font-size: 17px; }
.read-column { width: min(100%, var(--read)); }
.center-column { margin-inline: auto; }
.page-hero { margin-bottom: 44px; }
.page-hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, .75fr); gap: 36px; align-items: center; }
.page-section { padding-block: 34px; border-top: 1px solid var(--line); }
.page-section:first-of-type { border-top: 0; }
.page-section .section-intro { max-width: 860px; color: var(--muted); }
.prose p { color: var(--text); }
.prose strong { color: var(--paper); }
.prose a { color: var(--paper); text-decoration: underline; text-decoration-color: var(--wine); text-underline-offset: 4px; }
.note { padding: 16px 18px; border-left: 3px solid var(--rust); background: var(--surface); color: var(--muted); }
.editor-note { padding: 18px 20px; border: 1px solid var(--line-strong); background: rgba(139,30,45,.12); border-radius: 8px; }
.editor-note strong { display: block; margin-bottom: 6px; color: var(--red-bright); }
.editor-note + .editor-note { margin-top: 12px; }

.btn-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.btn-primary, .btn-secondary, .text-link {
    min-height: 44px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; border-radius: 8px; padding: 10px 16px; font-weight: 760;
}
.btn-primary { color: #fff8f0; background: linear-gradient(135deg,#FF4A4F 0%,#E11D2E 46%,#E25A2A 100%); box-shadow: 0 10px 26px rgba(225,29,46,.16); }
.btn-secondary { background: var(--paper); color: #2a211b; }
.text-link { padding-inline: 2px; color: var(--paper); }
.text-link::after { content: "→"; pointer-events: none; }
.btn-primary:hover, .btn-secondary:hover { transform: translateY(-1px); }

.media-box { display: flex; align-items: center; justify-content: center; min-width: 0; padding: 12px; background: #11100e; border: 1px solid var(--line); border-radius: 10px; }
.media-box img { width: auto; height: auto; max-width: 100%; max-height: 240px; object-fit: contain; object-position: center; }
.media-cover img { max-height: 300px; }
.media-cover { margin-top: 28px; }
.media-app img { max-height: 420px; }
.media-compact img { max-height: 190px; }
.cover-fallback { margin-top: 28px; min-height: 150px; display: grid; place-items: center; padding: 28px; border: 1px solid var(--line-strong); border-radius: 10px; background: linear-gradient(135deg, rgba(139,30,45,.46), rgba(12,11,10,.94)); color: var(--title); text-align: center; letter-spacing: .12em; font-weight: 800; }

.home-cover { padding-block: 52px 42px; }
.home-cover .hero-copy { max-width: 860px; }
.home-cover .hero-line { margin: 14px 0 0; color: var(--title); font-size: clamp(22px, 4vw, 38px); font-weight: 830; line-height: 1.35; }
.home-cover .hero-desc { max-width: 860px; color: var(--muted); margin-top: 18px; }
.home-section { padding-block: 48px; border-top: 1px solid var(--line); }
.section-heading { display: flex; gap: 18px; align-items: end; justify-content: space-between; margin-bottom: 24px; }
.section-heading p { max-width: 650px; margin: 0; color: var(--muted); }
.channel-guide { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.guide-item { min-width: 0; padding: 22px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.guide-item .tag { display: inline-block; margin-bottom: 8px; color: var(--rust); font-size: 12px; font-weight: 800; }
.guide-item p { color: var(--muted); margin: 0; }
.split-feature { display: grid; grid-template-columns: minmax(0, .95fr) minmax(0, 1.15fr); gap: 36px; align-items: start; }
.feature-list { display: grid; gap: 16px; }
.feature-item { padding: 0 0 16px; border-bottom: 1px solid var(--line); }
.feature-item:last-child { border-bottom: 0; }
.feature-item p { color: var(--muted); margin: 6px 0 0; }
.dual-editorial { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 28px; }
.editorial-unit { min-width: 0; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 20px; }
.editorial-unit .media-box { margin: -8px -8px 20px; }
.editorial-unit p { color: var(--muted); }
.focus-list { margin: 18px 0 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.focus-list li { position: relative; padding-left: 16px; color: var(--text); }
.focus-list li::before { content: ""; position: absolute; left: 0; top: .82em; width: 5px; height: 5px; border-radius: 50%; background: var(--amber); pointer-events: none; }
.short-columns { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 36px; }
.short-column { min-width: 0; padding-top: 18px; border-top: 2px solid var(--wine); }
.short-column p { color: var(--muted); }
.reply-track { display: grid; gap: 34px; }
.timeline { display: grid; gap: 0; }
.timeline-item { position: relative; padding: 4px 0 26px 28px; border-left: 1px solid var(--line-strong); }
.timeline-item::before { content: ""; position: absolute; left: -5px; top: 12px; width: 9px; height: 9px; border-radius: 50%; background: var(--red); pointer-events: none; }
.timeline-item:last-child { padding-bottom: 0; }
.status-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 12px; margin-top: 22px; }
.status-item { min-width: 0; padding: 16px; background: var(--surface-2); border: 1px solid var(--line); border-radius: 8px; }
.status-item strong { display: flex; align-items: center; gap: 8px; color: var(--title); }
.status-item strong::before { content: "状态"; display: inline-flex; align-items: center; min-height: 24px; padding: 1px 7px; border-radius: 3px; background: var(--wine); color: var(--paper); font-size: 11px; letter-spacing: .08em; pointer-events: none; }
.status-item p { color: var(--muted); margin: 7px 0 0; }
.dossier-layout { display: grid; grid-template-columns: .85fr 1.15fr; gap: 34px; }
.index-list { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line); }
.index-list li { border-bottom: 1px solid var(--line); }
.index-list a { min-height: 54px; display: flex; align-items: center; justify-content: space-between; gap: 12px; color: var(--paper); }
.index-list a::after { content: "→"; color: var(--red-bright); pointer-events: none; }
.brief-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; }
.brief-card { padding: 18px; background: var(--surface); border-top: 2px solid var(--rust); }
.brief-card p { color: var(--muted); }
.clue-band { padding: 28px; border: 1px solid var(--line-strong); border-radius: 10px; background: linear-gradient(120deg, rgba(139,30,45,.46), rgba(28,25,22,.92)); }
.app-layout { display: grid; grid-template-columns: minmax(260px,.72fr) minmax(0,1.28fr); gap: 38px; align-items: center; }
.service-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; }
.service-card { padding: 22px; border-top: 1px solid var(--line-strong); background: var(--surface); }
.service-card p { color: var(--muted); }

.two-col-page { display: grid; grid-template-columns: minmax(0, 1fr) minmax(250px, 320px); gap: 42px; align-items: start; }
.page-aside { position: sticky; top: calc(var(--header-h) + 22px); padding: 18px; border: 1px solid var(--line); background: var(--surface); border-radius: 8px; }
.page-aside h2 { font-size: 17px; }
.page-aside ul { list-style: none; margin: 0; padding: 0; }
.page-aside li + li { border-top: 1px solid var(--line); }
.page-aside a { min-height: 44px; display: flex; align-items: center; color: var(--muted); }
.page-aside a:hover { color: var(--paper); }
.topic-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 20px; }
.topic-panel { min-width: 0; padding: 20px; background: var(--surface); border-left: 3px solid var(--wine); }
.topic-panel p { color: var(--muted); }
.article-list { display: grid; gap: 28px; }
.article-block { padding-bottom: 28px; border-bottom: 1px solid var(--line); }
.article-block:last-child { border-bottom: 0; }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0; }
.topic-tag { display: inline-flex; align-items: center; min-height: 34px; padding: 5px 10px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); font-size: 14px; }
.compare-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 18px; }
.compare-box { padding: 20px; border: 1px solid var(--line); background: var(--surface); }
.compare-box h3 span { display: inline-block; margin-right: 7px; color: var(--rust); font-size: 12px; letter-spacing: .1em; }
.checklist { list-style: none; padding: 0; margin: 18px 0 0; display: grid; gap: 11px; }
.checklist li { position: relative; padding: 0 0 0 24px; color: var(--text); }
.checklist li::before { content: "✓"; position: absolute; left: 0; color: var(--amber); font-weight: 800; pointer-events: none; }
.steps { counter-reset: step; display: grid; gap: 18px; }
.step { counter-increment: step; position: relative; padding: 0 0 18px 52px; border-bottom: 1px solid var(--line); }
.step::before { content: counter(step, decimal-leading-zero); position: absolute; left: 0; top: 0; color: var(--red-bright); font-weight: 850; letter-spacing: .08em; }
.section-toc { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 8px 18px; margin: 20px 0 0; padding: 18px; background: var(--surface); border: 1px solid var(--line); }
.section-toc a { min-height: 44px; display: flex; align-items: center; color: var(--muted); }
.section-toc a:hover { color: var(--paper); }
.policy-section { padding: 28px 0; border-top: 1px solid var(--line); }
.policy-section h2 { font-size: 22px; }
.related-links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.related-links a { min-height: 44px; display: inline-flex; align-items: center; padding: 6px 12px; border: 1px solid var(--line); border-radius: 6px; color: var(--paper); }
.related-links a:hover { border-color: var(--red); }
.faq-list { display: grid; gap: 12px; margin-top: 28px; }
details { border: 1px solid var(--line); background: var(--surface); border-radius: 8px; }
summary { min-height: 52px; display: flex; align-items: center; padding: 12px 18px; cursor: pointer; color: var(--title); font-weight: 760; }
details p { padding: 0 18px 18px; color: var(--muted); margin: 0; }
.contact-cards { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 18px; }
.contact-card { padding: 20px; background: var(--surface); border-top: 2px solid var(--wine); }
.contact-card p { color: var(--muted); }

.site-footer { background: var(--footer); color: var(--footer-text); border-top: 2px solid var(--wine); padding: 40px 0 34px; }
.footer-brand-row { display: grid; grid-template-columns: auto minmax(0,1fr); gap: 34px; align-items: center; padding-bottom: 30px; border-bottom: 1px solid var(--line); }
.footer-brand { min-height: 50px; }
.footer-brand-row > p { max-width: 760px; margin: 0; color: var(--muted); }
.footer-directory { display: grid; grid-template-columns: repeat(6,minmax(0,1fr)); gap: 24px; padding-block: 30px; }
.footer-group h2 { font-size: 14px; color: var(--paper); margin-bottom: 10px; }
.footer-group ul { list-style: none; padding: 0; margin: 0; }
.footer-group a { min-height: 44px; font-size: 14px; }
.footer-legal { padding-top: 24px; border-top: 1px solid var(--line); color: var(--soft); font-size: 13px; }
.footer-legal p { margin-bottom: 8px; }

.layer-backdrop { position: fixed; inset: 0; z-index: 60; background: rgba(0,0,0,.72); }
.site-layer { position: fixed; z-index: 70; background: var(--bg-deep); border: 1px solid var(--line-strong); box-shadow: var(--shadow); color: var(--text); }
.directory-layer { left: 50%; top: 50%; width: min(960px, calc(100vw - 48px)); max-height: min(82vh, 820px); transform: translate(-50%,-50%); border-radius: 12px; overflow: auto; }
.search-layer { left: 50%; top: 50%; width: min(720px, calc(100vw - 48px)); max-height: min(82vh, 760px); transform: translate(-50%,-50%); border-radius: 12px; overflow: auto; }
.layer-head { position: sticky; top: 0; z-index: 2; display: flex; align-items: center; justify-content: space-between; gap: 18px; min-height: 72px; padding: 14px 18px; background: rgba(22,19,17,.98); border-bottom: 1px solid var(--line); }
.layer-head > div:not(.layer-brand) { display: grid; }
.layer-head small { color: var(--soft); font-size: 12px; }
.layer-logo { height: 30px; }
.directory-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 0; padding: 10px 18px 18px; }
.directory-group { min-width: 0; padding: 18px; border-bottom: 1px solid var(--line); }
.directory-group h2 { font-size: 16px; margin-bottom: 10px; }
.directory-group ul { list-style: none; margin: 0; padding: 0; }
.directory-item { display: grid; min-height: 70px; align-content: center; padding: 10px 0; border-top: 1px solid var(--line); }
.directory-item strong { color: var(--paper); }
.directory-item span { color: var(--soft); font-size: 13px; line-height: 1.55; }
.directory-item.is-current strong::before { content: ""; display: inline-block; width: 4px; height: 12px; margin-right: 7px; background: var(--red); border-radius: 2px; pointer-events: none; }
.search-control { padding: 22px 22px 10px; }
.search-control label { display: block; margin-bottom: 7px; color: var(--paper); font-weight: 740; }
.search-control input { width: 100%; min-height: 48px; border: 1px solid var(--line-strong); border-radius: 8px; background: var(--surface); color: var(--title); padding: 10px 12px; outline: none; }
.search-control input:focus { border-color: var(--red-bright); box-shadow: 0 0 0 3px rgba(225,29,46,.18); }
.search-control p { color: var(--soft); font-size: 13px; margin: 8px 0 0; }
.search-results { padding: 10px 22px 22px; display: grid; gap: 8px; }
.search-result-item { display: grid; min-height: 66px; align-content: center; padding: 9px 12px; border: 1px solid var(--line); border-radius: 7px; background: var(--surface); }
.search-result-item strong { color: var(--paper); }
.search-result-item span { color: var(--soft); font-size: 13px; }
.search-empty { color: var(--muted); padding: 14px; background: var(--surface); }
.search-all-links { display: flex; flex-wrap: wrap; gap: 6px 10px; padding: 0 22px 24px; color: var(--soft); font-size: 13px; }
.search-all-links span { width: 100%; color: var(--paper); font-weight: 740; }
.search-all-links a { min-height: 44px; display: inline-flex; align-items: center; text-decoration: underline; text-underline-offset: 3px; }

.mobile-bottom-nav { display: none; }

:focus-visible { outline: 3px solid rgba(255,74,79,.8); outline-offset: 3px; }
::selection { background: rgba(225,29,46,.65); color: #fff; }

@media (max-width: 1080px) {
    .footer-directory { grid-template-columns: repeat(3,minmax(0,1fr)); }
    .service-grid, .status-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
}
@media (max-width: 900px) {
    :root { --header-h: 68px; }
    .shell, .page-shell { width: min(calc(100% - 32px), var(--max)); }
    .desktop-header-actions, .channel-nav-desktop { display: none; }
    .mobile-header-actions { display: flex; }
    .brand-copy small { display: none; }
    .channel-nav-mobile { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 4px 8px; padding-block: 9px; }
    .channel-nav-mobile a { justify-content: center; min-height: 44px; font-size: 14px; border: 1px solid transparent; border-radius: 6px; }
    .channel-nav-mobile a.is-current { border-color: var(--line-strong); background: rgba(139,30,45,.14); }
    .page-hero-grid, .split-feature, .app-layout, .dossier-layout, .two-col-page { grid-template-columns: 1fr; }
    .page-aside { position: static; }
    .channel-guide { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .brief-grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
    body { padding-bottom: calc(72px + env(safe-area-inset-bottom)); }
    .page-shell { padding-block: 26px 42px; }
    .home-cover { padding-block: 36px 28px; }
    .home-section { padding-block: 34px; }
    .section-heading { display: block; }
    .section-heading p { margin-top: 10px; }
    .dual-editorial, .short-columns, .topic-grid, .compare-grid, .contact-cards, .service-grid, .status-grid { grid-template-columns: 1fr; }
    .directory-layer { left: 0; right: 0; bottom: 0; top: auto; width: 100%; max-height: 88dvh; max-height: min(88dvh, 88vh); transform: none; border-radius: 14px 14px 0 0; }
    .search-layer { inset: 0; width: 100%; max-height: 100dvh; transform: none; border-radius: 0; }
    .directory-grid { grid-template-columns: repeat(2,minmax(0,1fr)); padding-inline: 10px; }
    .directory-group { padding: 14px 10px; }
    .mobile-bottom-nav { position: fixed; left: 0; right: 0; bottom: 0; z-index: 30; display: grid; grid-template-columns: repeat(5,minmax(0,1fr)); min-height: calc(56px + env(safe-area-inset-bottom)); padding-bottom: env(safe-area-inset-bottom); background: rgba(8,7,6,.97); border-top: 1px solid var(--line-strong); }
    .mobile-bottom-nav a { position: relative; min-width: 0; min-height: 56px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px; color: var(--muted); font-size: 12px; }
    .mobile-nav-mark { width: 18px; height: 3px; border-radius: 3px; background: var(--surface-2); pointer-events: none; }
    .mobile-bottom-nav a.is-current { color: var(--title); font-weight: 780; }
    .mobile-bottom-nav a.is-current .mobile-nav-mark { background: var(--red); }
    .footer-directory { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .footer-brand-row { grid-template-columns: 1fr; gap: 16px; }
    .site-footer { padding-bottom: 32px; }
    .media-box img { max-height: 220px; }
    .media-cover img { max-height: 260px; }
    .media-app img { max-height: 360px; }
    .section-toc { grid-template-columns: 1fr; }
}
@media (max-width: 420px) {
    .shell, .page-shell { width: min(calc(100% - 32px), var(--max)); }
    .brand-bar { gap: 8px; }
    .brand-link { gap: 8px; min-width: 0; }
    .brand-logo { max-width: 104px; height: 30px; }
    .brand-copy { display: none; }
    .brand-copy strong { font-size: 16px; }
    .header-action { padding-inline: 10px; font-size: 14px; }
    .channel-nav-mobile { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .channel-guide { grid-template-columns: 1fr; }
    .directory-grid { grid-template-columns: 1fr; }
    .footer-directory { grid-template-columns: 1fr; }
    .clue-band { padding: 22px 18px; }
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}