:root {
    --brand: #6D28D9;
    --brand-soft: #A78BFA;
    --ink-deep: #17151C;
    --paper: #F7F5FA;
    --paper-2: #ECE8F2;
    --text: #27242D;
    --muted: #716B78;
    --accent: #F59E0B;
    --white: #FFFFFF;
    --line: #D9D3E1;
    --line-dark: #342F3B;
    --shadow: 0 18px 50px rgba(23, 21, 28, .09);
    --radius-lg: 28px;
    --radius-md: 18px;
    --radius-sm: 12px;
    --shell: min(1180px, calc(100% - 40px));
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--text); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; line-height: 1.75; text-rendering: optimizeLegibility; }
body.modal-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--brand); }
img { display: block; max-width: 100%; height: auto; object-fit: cover; }
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button:focus-visible, a:focus-visible, input:focus-visible, summary:focus-visible { outline: 3px solid rgba(245,158,11,.55); outline-offset: 3px; }
.shell { width: var(--shell); margin-inline: auto; }
.skip-link { position: fixed; top: 8px; left: 8px; z-index: 1000; transform: translateY(-150%); background: var(--accent); color: #1d1606; padding: 10px 14px; border-radius: 8px; font-weight: 800; }
.skip-link:focus { transform: translateY(0); }
.site-header { position: sticky; top: 0; z-index: 100; background: rgba(247,245,250,.96); border-bottom: 1px solid rgba(113,107,120,.16); backdrop-filter: blur(14px); }
.header-row { min-height: 78px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 24px; }
.brand-mark { display: inline-flex; align-items: center; gap: 11px; min-width: 182px; }
.brand-mark img { width: 44px; height: 44px; border-radius: 11px; background: var(--paper-2); }
.brand-mark span { display: grid; line-height: 1.2; }
.brand-mark strong { font-size: 1.18rem; letter-spacing: .02em; color: var(--ink-deep); }
.brand-mark small { margin-top: 5px; color: var(--muted); font-size: .73rem; }
.primary-nav { display: flex; justify-content: center; gap: 6px; flex-wrap: wrap; }
.primary-nav a { padding: 9px 12px; color: #504a56; border-radius: 9px; font-size: .94rem; }
.primary-nav a[aria-current="page"], .primary-nav a:hover { background: var(--paper-2); color: var(--brand); }
.search-open, .nav-toggle { border: 1px solid var(--line); background: var(--white); color: var(--ink-deep); border-radius: 999px; padding: 10px 15px; cursor: pointer; }
.search-open:hover, .nav-toggle:hover { border-color: var(--brand-soft); }
.nav-toggle { display: none; }
.search-modal[hidden] { display: none !important; }
.search-modal { position: fixed; inset: 0; z-index: 200; display: grid; place-items: start center; padding: 12vh 20px 30px; }
.search-backdrop { position: absolute; inset: 0; background: rgba(23,21,28,.74); }
.search-panel { position: relative; width: min(700px, 100%); border-radius: 26px; padding: 34px; background: var(--paper); box-shadow: 0 32px 90px rgba(0,0,0,.35); }
.search-close { position: absolute; right: 18px; top: 14px; border: 0; background: transparent; font-size: 2rem; line-height: 1; color: var(--muted); cursor: pointer; }
.search-panel h2 { margin: 4px 40px 18px 0; font-size: clamp(1.55rem, 4vw, 2.3rem); line-height: 1.2; }
.search-form label { display: block; margin-bottom: 7px; font-weight: 700; }
.search-line { display: grid; grid-template-columns: 1fr auto; gap: 10px; }
.search-line input { width: 100%; min-width: 0; border: 1px solid var(--line); background: var(--white); border-radius: 12px; padding: 13px 14px; color: var(--text); }
.search-line button { border: 0; border-radius: 12px; background: var(--brand); color: #fff; padding: 12px 20px; font-weight: 800; cursor: pointer; }
.eyebrow { margin: 0 0 10px; color: var(--brand); text-transform: uppercase; letter-spacing: .08em; font-size: .79rem; font-weight: 900; }
.section-dark .eyebrow, .compact-dark .eyebrow { color: #cdbbfb; }
.lead { font-size: clamp(1.06rem, 2vw, 1.22rem); color: #49434e; line-height: 1.85; }
.section-dark .lead, .section-dark p { color: #d8d2dc; }
.muted { color: var(--muted); }
.button { display: inline-flex; min-height: 44px; align-items: center; justify-content: center; padding: 10px 17px; border-radius: 12px; font-weight: 800; transition: transform .18s ease, border-color .18s ease, background .18s ease; }
.button:hover { transform: translateY(-1px); }
.button.primary { background: var(--brand); color: #fff; }
.button.secondary { border: 1px solid var(--line); background: transparent; color: var(--ink-deep); }
.button.secondary:hover { border-color: var(--brand); color: var(--brand); }
.button.light { background: #fff; color: var(--ink-deep); }
.text-link { display: inline-flex; margin-top: 10px; color: var(--brand); font-weight: 800; }
.light-link { color: #d7c8ff; }
.button-row, .hero-links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.section { padding-block: 78px; }
.section-soft { background: var(--paper-2); }
.section-plain { background: #fff; }
.section-dark { background: var(--ink-deep); color: #f8f5fb; }
.section-heading { max-width: 790px; margin-bottom: 30px; }
.section-heading.wide { max-width: 900px; }
.section-heading.compact { max-width: 720px; }
.section-heading h2, .split-intro h2, .topic-copy h2, .next-path h2, .page-head h1, .article-head h1 { margin: 0; color: var(--ink-deep); line-height: 1.16; letter-spacing: -.035em; }
.section-heading h2, .split-intro h2, .topic-copy h2, .next-path h2 { font-size: clamp(1.8rem, 3.5vw, 3rem); }
.section-heading p:last-child { color: var(--muted); }
.hero { padding-block: 58px 72px; }
.hero-editorial { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(360px, .95fr); gap: 52px; align-items: center; }
.hero-copy h1 { margin: 0; max-width: 780px; font-size: clamp(2.55rem, 5.4vw, 5.4rem); line-height: .99; letter-spacing: -.06em; color: var(--ink-deep); }
.hero-copy .lead { max-width: 700px; margin-top: 25px; }
.inline-facts { display: flex; flex-wrap: wrap; gap: 8px 18px; list-style: none; padding: 0; margin: 24px 0 0; color: var(--muted); font-size: .89rem; }
.inline-facts li::before { content: "•"; color: var(--accent); margin-right: 7px; }
.hero-media { margin: 0; background: var(--paper-2); padding: 12px; border-radius: 32px 32px 12px 32px; box-shadow: var(--shadow); }
.hero-media img { aspect-ratio: 4 / 3; width: 100%; border-radius: 23px 23px 8px 23px; }
.hero-media figcaption { padding: 12px 7px 3px; color: var(--muted); font-size: .85rem; }
.split-intro { display: grid; grid-template-columns: 1.05fr .95fr; gap: 70px; align-items: end; }
.split-intro h2 { color: #fff; }
.split-intro p { margin-top: 0; font-size: 1.06rem; }
.watch-layout { display: grid; grid-template-columns: minmax(360px, 1.03fr) minmax(0, .97fr); gap: 32px; }
.feature-figure { margin: 0; }
.feature-figure img { width: 100%; height: 100%; max-height: 640px; border-radius: 24px; }
.rank-list { border-top: 1px solid var(--line); }
.rank-row { display: grid; grid-template-columns: 42px 1fr; gap: 2px 14px; padding: 16px 5px; border-bottom: 1px solid var(--line); }
.rank-row > span { grid-row: 1 / 3; color: var(--brand); font-weight: 900; font-size: 1.18rem; }
.rank-row strong { line-height: 1.35; }
.rank-row small { color: var(--muted); line-height: 1.55; }
.section-cta { margin: 28px 0 0; }
.editorial-index { display: grid; grid-template-columns: .36fr .64fr; gap: 58px; align-items: start; }
.index-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 28px; }
.index-group { padding: 0 0 25px; border-bottom: 1px solid #cdc5d5; }
.index-group h3 { margin: 0 0 7px; font-size: 1.15rem; }
.index-group p { color: var(--muted); font-size: .94rem; }
.index-group ul { list-style: none; padding: 0; margin: 14px 0 0; display: grid; gap: 5px; }
.index-group li a { color: #4f4854; font-size: .93rem; }
.index-group li a::after { content: " →"; color: var(--brand-soft); }
.topic-strip { display: grid; grid-template-columns: .78fr 1.22fr; gap: 45px; align-items: center; }
.topic-copy p:not(.eyebrow) { color: var(--muted); }
.topic-visuals { display: grid; grid-template-columns: 1.1fr .9fr; gap: 12px; }
.topic-visuals img { width: 100%; border-radius: 22px; aspect-ratio: 4 / 3; }
.topic-visuals img:last-child { margin-top: 44px; }
.free-panel { display: grid; grid-template-columns: .82fr 1.18fr; gap: 60px; align-items: start; }
.free-panel h2 { margin-top: 0; font-size: clamp(1.8rem, 3.6vw, 3.1rem); line-height: 1.15; }
.free-panel > div:first-child p { color: var(--muted); }
.mini-notes { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.mini-notes article { border-top: 2px solid var(--ink-deep); padding-top: 15px; }
.mini-notes h3 { margin: 0 0 5px; }
.mini-notes p { color: var(--muted); font-size: .93rem; }
.compact-dark { padding-block: 55px; }
.guidance-band { display: grid; grid-template-columns: .7fr 1.3fr; gap: 46px; align-items: center; }
.guidance-band img { border-radius: 18px; width: 100%; }
.guidance-band h2 { margin: 0; font-size: clamp(1.8rem, 3.3vw, 2.8rem); line-height: 1.15; }
.late-topic-row { display: grid; grid-template-columns: .76fr 1.24fr; gap: 36px; align-items: start; }
.late-topic-row img { width: 100%; border-radius: 20px; }
.line-card { display: grid; padding: 15px 0; border-top: 1px solid var(--line); }
.line-card strong { margin-bottom: 3px; }
.line-card span { color: var(--muted); font-size: .93rem; }
.final-map { display: grid; grid-template-columns: .65fr 1.35fr; gap: 56px; }
.final-map h2 { margin: 0; font-size: clamp(1.8rem,3vw,2.65rem); line-height: 1.2; }
.path-map { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.path-map a { display: grid; align-content: start; min-height: 132px; border: 1px solid #d2c9db; border-radius: 15px; background: rgba(255,255,255,.36); padding: 18px; }
.path-map strong { margin-bottom: 8px; }
.path-map span { color: var(--muted); font-size: .93rem; }
.page-head { padding-block: 54px 34px; }
.page-head h1 { max-width: 980px; font-size: clamp(2.35rem, 5vw, 4.5rem); }
.page-head .lead { max-width: 900px; }
.narrow-head { max-width: 980px; }
.breadcrumbs { margin-bottom: 26px; }
.breadcrumbs ol { display: flex; gap: 8px; flex-wrap: wrap; list-style: none; padding: 0; margin: 0; color: var(--muted); font-size: .84rem; }
.breadcrumbs li:not(:last-child)::after { content: "/"; margin-left: 8px; color: #aea7b4; }
.brand-overview, .watch-head-grid, .dimension-grid, .guide-grid, .faq-grid, .about-grid, .search-page-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 48px; align-items: center; }
.brand-overview figure { margin: 0; }
.brand-overview img, .watch-head-grid img, .dimension-grid img, .guide-grid img, .faq-grid img, .about-grid img, .search-page-grid img { width: 100%; border-radius: 24px; }
.brand-overview h2 { margin-top: 0; font-size: clamp(1.75rem,3vw,2.55rem); line-height: 1.2; }
.definition-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.definition-grid article { padding: 20px; background: rgba(255,255,255,.55); border-top: 3px solid var(--brand); border-radius: 0 0 14px 14px; }
.definition-grid h3 { margin: 0 0 6px; }
.definition-grid p { margin: 0; color: var(--muted); font-size: .94rem; }
.editorial-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 28px; }
.editorial-list > a { display: grid; padding: 18px 0; border-top: 1px solid var(--line); }
.editorial-list > a > span { color: var(--brand); font-size: .78rem; font-weight: 900; letter-spacing: .04em; }
.editorial-list > a > strong { margin: 3px 0 4px; font-size: 1.06rem; line-height: 1.45; }
.editorial-list > a > p { margin: 0; color: var(--muted); font-size: .93rem; }
.callout-line { border-top: 1px solid var(--line); display: grid; grid-template-columns: .8fr 1.2fr; gap: 50px; padding-top: 38px; padding-bottom: 55px; }
.callout-line h2 { margin: 0; font-size: clamp(1.5rem,2.8vw,2.2rem); line-height: 1.25; }
.callout-line p { margin: 0; color: var(--muted); }
.callout-line a { color: var(--brand); font-weight: 800; }
.watch-head-grid { grid-template-columns: 1.1fr .9fr; }
.dense-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 30px; border-bottom: 1px solid var(--line); }
.dense-list a { display: grid; grid-template-columns: 34px 1fr; gap: 12px; padding: 15px 0; border-top: 1px solid var(--line); }
.dense-list b { color: var(--brand-soft); font-size: 1.2rem; }
.dense-list span { display: grid; gap: 3px; }
.dense-list small { color: var(--muted); line-height: 1.55; }
.media-explain { display: grid; grid-template-columns: 1.08fr .92fr; gap: 50px; align-items: center; }
.media-explain figure { margin: 0; }
.media-explain img { width: 100%; border-radius: 22px; }
.media-explain h2 { margin: 0; font-size: clamp(1.9rem,3.4vw,3rem); line-height: 1.16; }
.columns-flow { display: grid; grid-template-columns: 1.3fr .7fr; gap: 56px; align-items: start; }
.flow-main > h2 { margin-top: 0; font-size: clamp(1.9rem,3vw,2.7rem); }
.story-row { display: grid; grid-template-columns: 1fr auto; gap: 2px 18px; padding: 16px 0; border-top: 1px solid var(--line); }
.story-row h3 { margin: 0; line-height: 1.35; }
.story-row p { grid-column: 1; margin: 5px 0 0; color: var(--muted); }
.story-row span { grid-column: 2; grid-row: 1; color: var(--brand); font-size: .8rem; }
.flow-aside { position: sticky; top: 105px; padding: 24px; background: var(--paper-2); border-radius: 18px; }
.flow-aside h2 { margin-top: 0; }
.flow-aside > p, .flow-aside div p { color: var(--muted); }
.flow-aside div { border-top: 1px solid #d1c9da; padding-top: 12px; margin-top: 12px; }
.next-path { display: flex; align-items: center; justify-content: space-between; gap: 35px; }
.next-path > div:first-child { max-width: 790px; }
.next-path p { color: var(--muted); }
.collection-grid { display: grid; gap: 44px; }
.collection-block { display: grid; grid-template-columns: .9fr 1.1fr; gap: 34px; padding-bottom: 44px; border-bottom: 1px solid var(--line); align-items: center; }
.collection-block:nth-child(even) { grid-template-columns: 1.1fr .9fr; }
.collection-block:nth-child(even) img { order: 2; }
.collection-block img { width: 100%; border-radius: 21px; aspect-ratio: 16 / 10; }
.collection-block h2 { margin: 5px 0 10px; font-size: clamp(1.6rem,3vw,2.45rem); line-height: 1.2; }
.collection-block > div > span { color: var(--brand); font-weight: 800; font-size: .82rem; }
.collection-block p { color: var(--muted); }
.collection-block ul { list-style: none; padding: 0; margin: 18px 0 0; display: grid; gap: 7px; }
.collection-block li a::before { content: "→"; color: var(--brand-soft); margin-right: 8px; }
.free-detail { display: grid; grid-template-columns: .8fr 1.2fr; gap: 45px; align-items: start; }
.free-detail > img { width: 100%; border-radius: 22px; position: sticky; top: 105px; }
.free-detail article { padding: 0 0 22px; margin-bottom: 22px; border-bottom: 1px solid var(--line); }
.free-detail article h2 { margin: 0 0 6px; font-size: 1.35rem; }
.free-detail article p { margin: 0; color: var(--muted); }
.compact-list { max-width: 920px; margin-inline: auto; }
.guide-steps { display: grid; grid-template-columns: 1fr 1fr; gap: 0 34px; }
.guide-steps article { display: grid; grid-template-columns: 46px 1fr; gap: 2px 12px; border-top: 1px solid var(--line); padding: 20px 0; }
.guide-steps article > span { grid-row: 1 / 3; color: var(--brand-soft); font-weight: 900; font-size: 1.4rem; }
.guide-steps h2 { margin: 0; font-size: 1.17rem; }
.guide-steps p { margin: 5px 0 0; color: var(--muted); }
.faq-list { max-width: 900px; }
.faq-list details { border-top: 1px solid var(--line); }
.faq-list details:last-child { border-bottom: 1px solid var(--line); }
.faq-list summary { cursor: pointer; list-style: none; padding: 21px 46px 21px 0; font-weight: 800; position: relative; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 2px; top: 14px; color: var(--brand); font-size: 1.7rem; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details div { padding: 0 34px 20px 0; color: var(--muted); }
.faq-list details p { margin: 0; }
.library-layout { display: grid; grid-template-columns: 280px 1fr; gap: 48px; align-items: start; }
.category-rail { position: sticky; top: 105px; }
.category-rail h2 { margin-top: 0; }
.category-rail > div { padding: 12px 0; border-top: 1px solid var(--line); }
.category-rail > div p { margin: 4px 0 0; color: var(--muted); font-size: .88rem; }
.library-list > article { padding: 22px 0 26px; border-top: 1px solid var(--line); }
.library-list > article h2 { margin: 7px 0; font-size: 1.35rem; line-height: 1.35; }
.library-list > article p { color: var(--muted); }
.library-meta { display: flex; gap: 8px; flex-wrap: wrap; }
.library-meta span { border: 1px solid var(--line); border-radius: 999px; padding: 3px 9px; color: #625b68; font-size: .76rem; }
.pagination { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 12px; padding-top: 28px; border-top: 2px solid var(--ink-deep); }
.pagination a:last-child { text-align: right; }
.pagination a { font-weight: 800; color: var(--brand); }
.pagination span { color: var(--muted); font-size: .88rem; }
.article-shell { padding-block: 34px 74px; }
.article-head { max-width: 980px; padding: 24px 0 42px; border-bottom: 1px solid var(--line); }
.article-head h1 { font-size: clamp(2.25rem,4.8vw,4.35rem); }
.article-meta { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 20px; }
.article-meta span { padding: 5px 10px; border-radius: 999px; background: var(--paper-2); color: var(--muted); font-size: .79rem; }
.article-layout { display: grid; grid-template-columns: minmax(0,1fr) 320px; gap: 54px; align-items: start; padding-top: 42px; }
.article-body { max-width: 790px; }
.article-body section { margin-bottom: 42px; }
.article-body h2 { font-size: clamp(1.45rem,2.4vw,2rem); line-height: 1.32; margin: 0 0 13px; }
.article-body p { margin: 0 0 15px; font-size: 1.03rem; }
.article-close { padding: 24px; background: var(--paper-2); border-radius: 18px; }
.article-aside { min-width: 0; }
.sticky-box { position: sticky; top: 105px; border-top: 3px solid var(--brand); padding-top: 14px; }
.sticky-box h2 { font-size: 1.13rem; }
.sticky-box > a:not(.text-link) { display: grid; padding: 12px 0; border-top: 1px solid var(--line); }
.sticky-box a span { color: var(--muted); font-size: .8rem; }
.prose-sections { max-width: 900px; }
.prose-sections article { padding: 26px 0; border-top: 1px solid var(--line); }
.prose-sections h2 { margin: 0 0 10px; font-size: 1.6rem; }
.prose-sections p { color: #4d4752; }
.prose-sections code { background: var(--paper-2); padding: 2px 6px; border-radius: 6px; }
.policy-head { display: grid; grid-template-columns: 1.2fr .8fr; gap: 42px; align-items: center; }
.policy-head img { width: 100%; border-radius: 22px; }
.contact-head { display: grid; grid-template-columns: 1.2fr .8fr; gap: 42px; align-items: center; }
.contact-head img { width: 100%; border-radius: 22px; }
.contact-layout { display: grid; grid-template-columns: 1.2fr .8fr; gap: 50px; align-items: start; }
.contact-types > h2 { margin-top: 0; }
.contact-types article { border-top: 1px solid var(--line); padding: 18px 0; }
.contact-types article h3 { margin: 0 0 5px; }
.contact-types article p { margin: 0; color: var(--muted); }
.contact-box { padding: 24px; background: var(--paper-2); border-radius: 18px; }
.contact-box h2 { margin-top: 0; }
.page-search { margin-top: 24px; max-width: 620px; }
.search-results { padding-top: 36px; }
.results-head { border-bottom: 2px solid var(--ink-deep); margin-bottom: 8px; }
.results-head h2 { margin-bottom: 4px; }
.results-head p { color: var(--muted); }
.empty-state { max-width: 760px; padding: 40px; background: var(--paper-2); border-radius: 22px; }
.empty-state h2 { margin-top: 0; }
.not-found { min-height: 72vh; display: grid; grid-template-columns: 1.15fr .85fr; gap: 50px; align-items: center; padding-block: 70px; }
.not-found h1 { margin: 0; font-size: clamp(2.5rem,5vw,4.7rem); line-height: 1.05; letter-spacing: -.05em; }
.not-found img { width: 100%; border-radius: 26px; }
.not-found .path-map { margin-top: 28px; }
.site-footer { background: #121015; color: #d8d1dc; padding-top: 58px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr .8fr .8fr .8fr; gap: 40px; padding-bottom: 42px; }
.footer-grid section p { color: #aaa2af; max-width: 460px; }
.footer-brand { margin: 0 0 8px !important; color: #fff !important; font-size: 1.25rem; font-weight: 900; }
.footer-grid nav { display: grid; align-content: start; gap: 7px; }
.footer-grid nav h2 { margin: 0 0 5px; color: #fff; font-size: .95rem; }
.footer-grid nav a { color: #aaa2af; font-size: .9rem; }
.footer-grid nav a:hover { color: #fff; }
.footer-bottom { min-height: 68px; display: flex; justify-content: space-between; align-items: center; gap: 20px; border-top: 1px solid #2d2932; color: #7f7884; font-size: .8rem; }
.back-top { position: fixed; right: 22px; bottom: 22px; z-index: 90; width: 46px; height: 46px; border: 1px solid #d6cde0; border-radius: 50%; background: #fff; color: var(--ink-deep); box-shadow: var(--shadow); cursor: pointer; font-size: 1.25rem; }
.back-top[hidden] { display: none; }
@media (max-width: 1100px) {
    :root { --shell: min(100% - 34px, 1040px); }
    .header-row { grid-template-columns: auto auto 1fr auto; }
    .nav-toggle { display: inline-flex; justify-self: end; }
    .primary-nav { position: absolute; top: 78px; left: 17px; right: 17px; display: none; padding: 14px; background: var(--paper); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); }
    .primary-nav.open { display: grid; grid-template-columns: repeat(3,1fr); }
    .header-row .primary-nav { grid-column: 1 / -1; }
    .search-open { justify-self: end; }
    .hero-editorial { grid-template-columns: 1fr 420px; gap: 34px; }
    .editorial-index { grid-template-columns: 1fr; gap: 20px; }
    .final-map { grid-template-columns: 1fr; gap: 24px; }
    .article-layout { grid-template-columns: minmax(0,1fr) 280px; gap: 36px; }
    .footer-grid { grid-template-columns: 1.2fr 1fr 1fr; }
    .footer-grid > nav:last-child { grid-column: 2 / 4; grid-template-columns: repeat(4,auto); gap: 12px 18px; }
    .footer-grid > nav:last-child h2 { grid-column: 1 / -1; }
}
@media (max-width: 900px) {
    .hero-editorial, .watch-layout, .topic-strip, .free-panel, .guidance-band, .late-topic-row, .brand-overview, .watch-head-grid, .dimension-grid, .guide-grid, .faq-grid, .about-grid, .search-page-grid, .media-explain, .columns-flow, .free-detail, .article-layout, .policy-head, .contact-head, .contact-layout, .not-found { grid-template-columns: 1fr; }
    .hero-media { max-width: 680px; }
    .topic-visuals { max-width: 720px; }
    .flow-aside, .free-detail > img, .sticky-box, .category-rail { position: static; }
    .library-layout { grid-template-columns: 1fr; gap: 26px; }
    .category-rail { display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; }
    .category-rail h2 { grid-column: 1 / -1; }
    .collection-block, .collection-block:nth-child(even) { grid-template-columns: 1fr; }
    .collection-block:nth-child(even) img { order: 0; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-grid > section { grid-column: 1 / -1; }
    .footer-grid > nav:last-child { grid-column: auto; grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
    :root { --shell: calc(100% - 28px); }
    .header-row { min-height: 68px; grid-template-columns: 1fr auto auto; gap: 9px; }
    .brand-mark { min-width: 0; }
    .brand-mark small { display: none; }
    .brand-mark img { width: 38px; height: 38px; }
    .nav-toggle, .search-open { padding: 8px 11px; font-size: .86rem; }
    .primary-nav { top: 68px; left: 14px; right: 14px; }
    .primary-nav.open { grid-template-columns: 1fr 1fr; }
    .section { padding-block: 58px; }
    .hero { padding-block: 42px 55px; }
    .hero-copy h1 { font-size: clamp(2.45rem,13vw,4.2rem); }
    .hero-editorial { gap: 30px; }
    .split-intro, .callout-line { grid-template-columns: 1fr; gap: 22px; }
    .index-columns, .mini-notes, .dense-list, .editorial-list, .guide-steps, .definition-grid, .path-map { grid-template-columns: 1fr; }
    .topic-visuals { grid-template-columns: 1fr 1fr; }
    .topic-visuals img:last-child { margin-top: 24px; }
    .watch-layout { gap: 18px; }
    .next-path { align-items: flex-start; flex-direction: column; }
    .category-rail { grid-template-columns: 1fr; }
    .pagination { grid-template-columns: 1fr 1fr; }
    .pagination span { grid-column: 1 / -1; grid-row: 1; text-align: center; }
    .article-head { padding-top: 12px; }
    .article-layout { padding-top: 28px; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px 18px; }
    .footer-bottom { align-items: flex-start; flex-direction: column; justify-content: center; padding-block: 18px; }
    .not-found { padding-block: 48px; }
    .search-panel { padding: 28px 20px; }
}
@media (max-width: 480px) {
    .brand-mark strong { font-size: 1rem; }
    .brand-mark img { width: 34px; height: 34px; }
    .search-open { font-size: 0; width: 40px; height: 40px; padding: 0; }
    .search-open::before { content: "⌕"; font-size: 1.35rem; }
    .nav-toggle { width: 54px; }
    .primary-nav.open { grid-template-columns: 1fr; }
    .search-line { grid-template-columns: 1fr; }
    .search-line button { width: 100%; }
    .hero-links, .button-row { align-items: stretch; flex-direction: column; }
    .button { width: 100%; }
    .topic-visuals { grid-template-columns: 1fr; }
    .topic-visuals img:last-child { margin-top: 0; }
    .rank-row { grid-template-columns: 32px 1fr; }
    .story-row { grid-template-columns: 1fr; }
    .story-row span { grid-column: 1; grid-row: auto; margin-top: 4px; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-grid > section, .footer-grid > nav:last-child { grid-column: auto; }
    .back-top { right: 14px; bottom: 14px; }
}