:root {
  --brand: #2F7D6D;
  --brand-dark: #245f54;
  --pink: #E88AAE;
  --ink: #1F2A2E;
  --text: #2A3133;
  --muted: #6F787A;
  --bg: #FAFBF8;
  --panel: #F2F5F1;
  --accent: #F29A3F;
  --line: #DDE5DF;
  --white: #FFFFFF;
  --shadow: 0 20px 55px rgba(31, 42, 46, .08);
  --radius-lg: 30px;
  --radius-md: 20px;
  --radius-sm: 12px;
  --max: 1240px;
  --header-h: 76px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; color: var(--text); background: var(--bg); line-height: 1.75; -webkit-font-smoothing: antialiased; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--brand); }
button, input { font: inherit; }
button { cursor: pointer; }
:focus-visible { outline: 3px solid rgba(242,154,63,.55); outline-offset: 3px; }
::selection { background: rgba(232,138,174,.28); }
.sr-only { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; left: 18px; top: 12px; z-index: 999; transform: translateY(-150%); background: var(--ink); color: white; padding: 10px 16px; border-radius: 10px; }
.skip-link:focus { transform: translateY(0); }
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(250,251,248,.94); backdrop-filter: blur(18px); border-bottom: 1px solid rgba(221,229,223,.86); }
.header-shell { width: min(var(--max), calc(100% - 40px)); margin: auto; min-height: var(--header-h); display: flex; align-items: center; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 11px; min-width: 218px; }
.brand-mark { width: 42px; height: 42px; border-radius: 14px; display: grid; place-items: center; background: var(--brand); color: white; font-weight: 900; font-size: 21px; box-shadow: inset 0 -5px 0 rgba(0,0,0,.08); }
.brand-copy { display: flex; flex-direction: column; line-height: 1.2; }
.brand-copy strong { color: var(--ink); font-size: 20px; letter-spacing: .02em; }
.brand-copy small { color: var(--muted); font-size: 11px; margin-top: 4px; white-space: nowrap; }
.primary-nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav-link { padding: 9px 13px; border-radius: 11px; color: #425052; font-size: 14px; font-weight: 650; }
.nav-link:hover, .nav-link.is-active { background: var(--panel); color: var(--brand-dark); }
.search-toggle, .menu-toggle { border: 0; background: transparent; color: var(--ink); }
.search-toggle { display: inline-flex; align-items: center; gap: 7px; padding: 9px 12px; border: 1px solid var(--line); border-radius: 12px; background: white; }
.menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 12px; padding: 10px; }
.menu-toggle span { display: block; height: 2px; background: var(--ink); margin: 4px 0; border-radius: 2px; }
.search-panel { max-height: 0; overflow: hidden; border-top: 1px solid transparent; transition: max-height .24s ease, border-color .24s ease; }
.search-panel.is-open { max-height: 150px; border-top-color: var(--line); }
.search-panel form { width: min(760px, calc(100% - 40px)); margin: 14px auto 18px; }
.search-panel label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 7px; }
.search-row { display: flex; gap: 8px; }
.search-row input, .inline-search input, .sticky-card input, .side-card input, .search-page__form input { flex: 1; min-width: 0; border: 1px solid var(--line); background: white; border-radius: 12px; padding: 11px 13px; color: var(--ink); }
.search-row button, .inline-search button, .sticky-card button, .side-card button, .search-page__form button { border: 0; border-radius: 12px; padding: 10px 17px; background: var(--brand); color: white; font-weight: 700; }
main { min-height: 70vh; }
.hero-shell { width: min(var(--max), calc(100% - 40px)); margin: 38px auto 64px; display: grid; grid-template-columns: .92fr 1.08fr; gap: 34px; align-items: stretch; }
.hero-copy { padding: 42px 10px 42px 0; align-self: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--brand-dark); text-transform: none; letter-spacing: .06em; font-size: 13px; font-weight: 800; }
.pulse-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 6px rgba(242,154,63,.12); }
.hero-copy h1, .page-hero h1 { color: var(--ink); font-size: clamp(38px, 5vw, 66px); line-height: 1.08; letter-spacing: -.045em; margin: 18px 0 20px; }
.hero-copy > p { max-width: 650px; color: #536062; font-size: 17px; }
.hero-actions, .app-actions, .status-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 10px 18px; border-radius: 14px; font-weight: 800; transition: transform .18s ease, box-shadow .18s ease; }
.btn:hover { transform: translateY(-2px); }
.btn--primary { color: white; background: var(--brand); box-shadow: 0 12px 24px rgba(47,125,109,.18); }
.btn--primary:hover { color: white; background: var(--brand-dark); }
.btn--ghost { border: 1px solid var(--line); background: white; color: var(--ink); }
.hero-keywords { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 28px; }
.hero-keywords a { border-bottom: 1px solid var(--line); color: var(--muted); font-size: 13px; padding-bottom: 2px; }
.hero-feature { position: relative; overflow: hidden; min-height: 540px; border-radius: 34px; background: var(--panel); box-shadow: var(--shadow); isolation: isolate; }
.hero-feature img { width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0; }
.hero-feature::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(20,30,28,0) 32%, rgba(20,30,28,.82) 100%); z-index: 1; }
.hero-feature__overlay { position: absolute; z-index: 2; left: 30px; right: 30px; bottom: 28px; color: white; }
.hero-feature__overlay h2 { font-size: clamp(25px,3vw,36px); line-height: 1.25; margin: 13px 0 10px; }
.hero-feature__overlay p { color: rgba(255,255,255,.82); margin: 0; max-width: 760px; }
.pill { display: inline-flex; align-items: center; border-radius: 999px; padding: 5px 10px; font-size: 12px; font-weight: 800; }
.pill--hot { background: var(--accent); color: #39220a; }
.pill--soft { background: #e6f1ed; color: var(--brand-dark); }
.section-shell { width: min(var(--max), calc(100% - 40px)); margin: 72px auto; }
.section-heading { margin-bottom: 26px; }
.section-heading h2 { margin: 8px 0 0; color: var(--ink); font-size: clamp(28px,3vw,42px); line-height: 1.2; letter-spacing: -.025em; }
.section-heading--split { display: flex; align-items: end; justify-content: space-between; gap: 24px; }
.text-link { color: var(--brand-dark); font-weight: 800; white-space: nowrap; }
.lead-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 24px; align-items: start; }
.story-card { background: white; border: 1px solid var(--line); border-radius: var(--radius-md); overflow: hidden; transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease; }
.story-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: #cbd8d1; }
.story-card__media { display: block; aspect-ratio: 16/10; overflow: hidden; background: var(--panel); }
.story-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
.story-card:hover .story-card__media img { transform: scale(1.025); }
.story-card__body { padding: 20px; }
.story-card__meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; color: var(--muted); font-size: 12px; }
.story-card__title { color: var(--ink); font-size: 20px; line-height: 1.38; margin: 12px 0 9px; }
.story-card__body p { color: #5b6769; margin: 0; font-size: 14px; }
.story-card__tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; color: var(--brand-dark); font-size: 12px; }
.story-card--feature .story-card__media { aspect-ratio: 16/9; }
.story-card--feature .story-card__title { font-size: clamp(25px,3vw,34px); }
.compact-stack { display: grid; gap: 12px; }
.compact-story { padding: 17px 18px; border: 1px solid var(--line); border-radius: 16px; background: rgba(255,255,255,.78); }
.compact-story__meta { display: flex; gap: 9px; color: var(--muted); font-size: 11px; }
.compact-story h3 { margin: 7px 0 5px; color: var(--ink); font-size: 17px; line-height: 1.35; }
.compact-story p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.55; }
.topic-band { padding: 72px 0; background: var(--panel); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.topic-band .section-shell { margin: 0 auto; }
.topic-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; }
.topic-card { position: relative; min-height: 390px; overflow: hidden; border-radius: 24px; background: var(--ink); color: white; }
.topic-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .56; transition: transform .35s ease, opacity .35s ease; }
.topic-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(26,35,37,.05), rgba(26,35,37,.88)); }
.topic-card > div { position: absolute; z-index: 2; left: 20px; right: 20px; bottom: 20px; }
.topic-card h3 { margin: 0 0 7px; font-size: 23px; }
.topic-card p { margin: 0 0 13px; font-size: 13px; color: rgba(255,255,255,.78); }
.topic-card span { font-size: 13px; font-weight: 800; }
.topic-card:hover { color: white; }
.topic-card:hover img { transform: scale(1.045); opacity: .66; }
.story-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.inline-search { display: flex; gap: 7px; min-width: 300px; }
.verify-strip { padding: 36px; border-radius: 28px; background: var(--ink); color: white; display: grid; grid-template-columns: .8fr 1.2fr; gap: 34px; }
.verify-strip .eyebrow { color: #8fd7c6; }
.verify-strip h2 { font-size: 34px; line-height: 1.22; margin: 10px 0 14px; }
.verify-strip p { color: #bdc7c8; }
.verify-strip .text-link { color: #f6b878; }
.timeline-mini { display: grid; grid-template-columns: repeat(2,1fr); gap: 12px; }
.timeline-mini article { padding: 20px; background: rgba(255,255,255,.075); border: 1px solid rgba(255,255,255,.1); border-radius: 17px; }
.timeline-mini article > span { color: #f6b878; font-size: 12px; font-weight: 800; }
.timeline-mini h3 { margin: 7px 0 5px; font-size: 18px; }
.timeline-mini p { margin: 0; font-size: 13px; line-height: 1.6; }
.video-split { width: min(var(--max), calc(100% - 40px)); margin: 72px auto 100px; display: grid; grid-template-columns: 1.05fr .95fr; gap: 0; align-items: center; }
.video-split__visual { border-radius: 28px; overflow: hidden; box-shadow: var(--shadow); }
.video-split__visual img { aspect-ratio: 4/3; width: 100%; object-fit: cover; }
.video-split__copy { margin-left: -46px; padding: 44px; border-radius: 24px; background: white; border: 1px solid var(--line); box-shadow: 0 18px 50px rgba(31,42,46,.10); position: relative; }
.video-split__copy h2 { color: var(--ink); font-size: 36px; line-height: 1.2; margin: 9px 0 14px; }
.video-split__copy p { color: var(--muted); }
.page-hero { width: min(var(--max), calc(100% - 40px)); margin: 36px auto 48px; padding: 48px; border-radius: 30px; border: 1px solid var(--line); background: linear-gradient(135deg, white 0%, #f1f6f3 100%); }
.page-hero p { max-width: 820px; color: var(--muted); font-size: 17px; margin-bottom: 0; }
.page-hero--track { background: linear-gradient(135deg, #f6f1f3, #f2f5f1); }
.page-hero--video { background: linear-gradient(135deg, #fff7f0, #f2f5f1); }
.page-hero--community { background: linear-gradient(135deg, #f7f2f6, #f0f7f4); }
.breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: 7px; padding: 0; margin: 0 0 20px; color: var(--muted); font-size: 12px; }
.breadcrumb li:not(:last-child)::after { content: "/"; margin-left: 7px; color: #a2aaaa; }
.update-board { display: grid; grid-template-columns: 260px 1fr; gap: 34px; align-items: start; }
.sticky-card { position: sticky; top: calc(var(--header-h) + 24px); padding: 22px; border: 1px solid var(--line); border-radius: 18px; background: white; }
.sticky-card h2 { margin: 0 0 14px; font-size: 18px; color: var(--ink); }
.sticky-card > a { display: block; padding: 9px 0; border-bottom: 1px solid #edf1ee; color: #4f5d5f; font-size: 14px; }
.sticky-card form { margin-top: 18px; }
.sticky-card label { display: block; font-size: 12px; color: var(--muted); margin-bottom: 7px; }
.sticky-card input { width: 100%; margin-bottom: 8px; }
.sticky-card button { width: 100%; }
.stream-group + .stream-group { margin-top: 56px; }
.list-feed { display: grid; gap: 16px; }
.story-card--row { display: grid; grid-template-columns: 260px 1fr; }
.story-card--row .story-card__media { aspect-ratio: auto; min-height: 190px; }
.story-card--row .story-card__body { align-self: center; }
.story-card--row .story-card__title { font-size: 22px; }
.note-panel, .visual-note, .community-feature { display: grid; grid-template-columns: .92fr 1.08fr; align-items: center; gap: 36px; padding: 30px; border: 1px solid var(--line); border-radius: 26px; background: white; }
.note-panel img, .visual-note img, .community-feature img { border-radius: 20px; width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.note-panel h2, .visual-note h2, .community-feature h2 { color: var(--ink); font-size: 34px; line-height: 1.25; margin: 9px 0 12px; }
.evidence-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 14px; }
.evidence-card { padding: 25px; border-radius: 20px; background: white; border: 1px solid var(--line); }
.evidence-card > span { color: var(--pink); font-weight: 900; font-size: 13px; }
.evidence-card h2 { font-size: 19px; margin: 7px 0 8px; color: var(--ink); }
.evidence-card p { margin: 0; color: var(--muted); font-size: 13px; }
.timeline-layout { display: grid; grid-template-columns: .78fr 1.22fr; gap: 38px; align-items: start; }
.timeline-layout__intro { position: sticky; top: calc(var(--header-h) + 22px); }
.timeline-layout__intro h2 { font-size: 36px; line-height: 1.2; margin: 8px 0 12px; color: var(--ink); }
.timeline-layout__intro p { color: var(--muted); }
.timeline-layout__intro img { margin-top: 22px; border-radius: 22px; aspect-ratio: 5/4; object-fit: cover; }
.timeline-feed { position: relative; }
.timeline-feed::before { content: ""; position: absolute; left: 26px; top: 18px; bottom: 18px; width: 1px; background: var(--line); }
.timeline-entry { position: relative; display: grid; grid-template-columns: 54px 1fr; gap: 18px; padding: 0 0 30px; }
.timeline-entry__index { width: 54px; height: 54px; border-radius: 50%; display: grid; place-items: center; background: var(--bg); border: 1px solid var(--line); color: var(--brand-dark); font-weight: 900; z-index: 1; }
.timeline-entry > div:last-child { padding: 20px; border-radius: 18px; background: white; border: 1px solid var(--line); }
.timeline-entry__meta { display: flex; gap: 10px; color: var(--muted); font-size: 12px; }
.timeline-entry h3 { margin: 8px 0 7px; font-size: 21px; line-height: 1.35; color: var(--ink); }
.timeline-entry p { margin: 0 0 8px; color: var(--muted); font-size: 14px; }
.timeline-entry a { color: var(--brand-dark); font-weight: 800; font-size: 13px; }
.callout-grid { display: grid; grid-template-columns: 1.35fr .65fr; gap: 18px; }
.callout-card { padding: 34px; border-radius: 24px; border: 1px solid var(--line); background: white; }
.callout-card--accent { background: #edf6f2; border-color: #cfe3da; }
.callout-card h2 { font-size: 30px; line-height: 1.24; margin: 8px 0 12px; color: var(--ink); }
.callout-card p { color: var(--muted); }
.callout-card a { color: var(--brand-dark); font-weight: 800; }
.video-stage { display: grid; grid-template-columns: 1.1fr .9fr; gap: 24px; }
.video-stage__visual { position: relative; border-radius: 26px; overflow: hidden; }
.video-stage__visual img { width: 100%; height: 100%; object-fit: cover; min-height: 560px; }
.video-stage__badge { position: absolute; left: 20px; bottom: 20px; background: var(--accent); color: #3a230e; font-weight: 900; border-radius: 999px; padding: 9px 14px; }
.video-stage__guide { display: grid; gap: 12px; }
.video-stage__guide article { display: grid; grid-template-columns: 48px 1fr; gap: 13px; padding: 20px; background: white; border: 1px solid var(--line); border-radius: 18px; }
.video-stage__guide article > span { width: 44px; height: 44px; border-radius: 14px; display: grid; place-items: center; background: #fff4e8; color: #af6118; font-weight: 900; }
.video-stage__guide h2 { margin: 0 0 4px; color: var(--ink); font-size: 18px; }
.video-stage__guide p { margin: 0; color: var(--muted); font-size: 13px; }
.story-grid--video .story-card:nth-child(2n) { transform: translateY(14px); }
.story-grid--video .story-card:nth-child(2n):hover { transform: translateY(10px); }
.app-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 42px; align-items: center; }
.app-layout__visual img { border-radius: 28px; width: 100%; aspect-ratio: 5/4; object-fit: cover; }
.app-layout__copy h2 { color: var(--ink); font-size: 40px; line-height: 1.18; margin: 9px 0 14px; }
.app-layout__copy > p { color: var(--muted); }
.microcopy { font-size: 12px; }
.principle-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 14px; }
.principle-grid article { padding: 24px; border-radius: 18px; border: 1px solid var(--line); background: white; }
.principle-grid h3 { margin: 0 0 9px; color: var(--ink); font-size: 19px; }
.principle-grid p { margin: 0; color: var(--muted); font-size: 13px; }
.article-shell { width: min(1120px, calc(100% - 40px)); margin: 36px auto 70px; }
.article-header { max-width: 900px; margin: 34px auto 30px; text-align: center; }
.article-header__meta { display: flex; justify-content: center; flex-wrap: wrap; gap: 9px 13px; color: var(--muted); font-size: 12px; }
.article-header h1 { color: var(--ink); font-size: clamp(36px,5vw,62px); line-height: 1.12; letter-spacing: -.04em; margin: 18px 0 18px; }
.article-deck { color: #5e6a6c; font-size: 18px; max-width: 820px; margin: auto; }
.article-tags { display: flex; justify-content: center; gap: 9px; flex-wrap: wrap; margin-top: 20px; }
.article-tags a { color: var(--brand-dark); font-size: 13px; }
.article-cover { margin: 0; border-radius: 28px; overflow: hidden; background: var(--panel); }
.article-cover img { width: 100%; aspect-ratio: 16/8; object-fit: cover; }
.article-layout { display: grid; grid-template-columns: 1fr 290px; gap: 48px; max-width: 980px; margin: 44px auto 0; align-items: start; }
.article-body { font-size: 17px; }
.article-body p { margin: 0 0 1.35em; }
.article-body h2 { color: var(--ink); font-size: 28px; line-height: 1.25; margin: 1.8em 0 .7em; }
.article-note { margin: 34px 0 0; padding: 22px; border-left: 4px solid var(--accent); background: #fff7ed; border-radius: 0 16px 16px 0; }
.article-note strong { color: #7b4819; }
.article-note p { margin: 5px 0 0; color: #735e4a; font-size: 14px; }
.article-side { display: grid; gap: 14px; position: sticky; top: calc(var(--header-h) + 24px); }
.side-card { padding: 20px; border: 1px solid var(--line); border-radius: 18px; background: white; }
.side-card h2 { font-size: 19px; line-height: 1.35; margin: 7px 0 8px; color: var(--ink); }
.side-card p { margin: 0 0 10px; color: var(--muted); font-size: 13px; }
.side-card a { color: var(--brand-dark); font-weight: 800; font-size: 13px; }
.side-card label { font-size: 12px; color: var(--muted); display: block; margin: 8px 0 6px; }
.side-card input { width: 100%; }
.side-card button { width: 100%; margin-top: 8px; }
.related-section { padding-top: 42px; border-top: 1px solid var(--line); }
.search-page__head { max-width: 820px; margin: 28px auto 42px; text-align: center; }
.search-page__head h1 { color: var(--ink); font-size: clamp(36px,5vw,58px); line-height: 1.15; margin: 10px 0 24px; }
.search-page__form { text-align: left; }
.search-page__form label { display: block; color: var(--muted); font-size: 12px; margin-bottom: 7px; }
.search-page__form > div { display: flex; gap: 8px; }
.result-count { color: var(--muted); font-size: 13px; margin-bottom: 14px; }
.search-empty { display: grid; grid-template-columns: .9fr 1.1fr; gap: 30px; align-items: center; padding: 30px; border: 1px solid var(--line); border-radius: 24px; background: white; }
.search-empty img { border-radius: 18px; aspect-ratio: 4/3; object-fit: cover; }
.search-empty h2 { color: var(--ink); font-size: 30px; margin: 0 0 8px; }
.search-empty p { color: var(--muted); }
.search-empty p a { color: var(--brand-dark); font-weight: 800; }
.status-page { width: min(760px, calc(100% - 40px)); min-height: 62vh; margin: auto; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; }
.status-code { color: var(--pink); font-size: 18px; font-weight: 900; letter-spacing: .25em; }
.status-page h1 { color: var(--ink); font-size: clamp(38px,6vw,64px); line-height: 1.1; margin: 10px 0 15px; }
.status-page p { color: var(--muted); max-width: 620px; }
.site-footer { margin-top: 100px; background: var(--ink); color: white; }
.footer-grid { width: min(var(--max), calc(100% - 40px)); margin: auto; padding: 54px 0 38px; display: grid; grid-template-columns: 1.6fr .7fr .7fr; gap: 40px; }
.brand--footer .brand-copy strong { color: white; }
.brand--footer .brand-copy small { color: #aebabb; }
.footer-grid > section:first-child p { max-width: 560px; color: #aebabb; font-size: 13px; margin-top: 18px; }
.footer-grid h2 { font-size: 14px; margin: 0 0 12px; color: #f2f5f1; }
.footer-grid section:not(:first-child) a { display: block; color: #aebabb; font-size: 13px; padding: 6px 0; }
.footer-grid section:not(:first-child) a:hover { color: white; }
.footer-bottom { width: min(var(--max), calc(100% - 40px)); margin: auto; display: flex; justify-content: space-between; align-items: center; padding: 20px 0 28px; border-top: 1px solid rgba(255,255,255,.1); color: #849092; font-size: 12px; }
.footer-bottom p { margin: 0; }
.footer-bottom a { color: #bec9ca; }
@media (max-width: 1080px) {
  .header-shell { gap: 14px; }
  .brand { min-width: auto; }
  .brand-copy small { display: none; }
  .nav-link { padding: 9px 9px; }
  .topic-grid { grid-template-columns: repeat(2,1fr); }
  .topic-card { min-height: 330px; }
  .evidence-grid, .principle-grid { grid-template-columns: repeat(2,1fr); }
  .story-grid { grid-template-columns: repeat(2,1fr); }
  .story-grid .story-card:last-child:nth-child(odd) { grid-column: span 2; display: grid; grid-template-columns: .8fr 1.2fr; }
  .story-grid .story-card:last-child:nth-child(odd) .story-card__media { aspect-ratio: auto; }
  .video-stage { grid-template-columns: 1fr; }
  .video-stage__visual img { min-height: auto; aspect-ratio: 16/9; }
}
@media (max-width: 860px) {
  :root { --header-h: 68px; }
  .header-shell { width: min(100% - 28px, var(--max)); min-height: var(--header-h); }
  .menu-toggle { display: block; order: 3; margin-left: auto; }
  .search-toggle { order: 2; margin-left: auto; }
  .primary-nav { position: absolute; left: 14px; right: 14px; top: calc(100% + 8px); display: grid; gap: 4px; padding: 12px; border-radius: 16px; background: white; border: 1px solid var(--line); box-shadow: var(--shadow); opacity: 0; visibility: hidden; transform: translateY(-8px); transition: opacity .18s ease, transform .18s ease, visibility .18s ease; }
  .primary-nav.is-open { opacity: 1; visibility: visible; transform: translateY(0); }
  .nav-link { padding: 12px; }
  .hero-shell { grid-template-columns: 1fr; margin-top: 24px; }
  .hero-copy { padding: 20px 0 0; }
  .hero-feature { min-height: 480px; }
  .lead-grid { grid-template-columns: 1fr; }
  .compact-stack { grid-template-columns: repeat(2,1fr); }
  .section-heading--split { align-items: flex-start; flex-direction: column; }
  .inline-search { min-width: min(100%, 420px); }
  .verify-strip { grid-template-columns: 1fr; }
  .video-split { grid-template-columns: 1fr; }
  .video-split__copy { margin: -50px 24px 0; }
  .update-board { grid-template-columns: 1fr; }
  .update-board__rail { display: none; }
  .timeline-layout { grid-template-columns: 1fr; }
  .timeline-layout__intro { position: static; }
  .callout-grid { grid-template-columns: 1fr; }
  .article-layout { grid-template-columns: 1fr; }
  .article-side { position: static; grid-template-columns: repeat(2,1fr); }
  .app-layout { grid-template-columns: 1fr; }
  .note-panel, .visual-note, .community-feature { grid-template-columns: 1fr; }
  .community-feature img { order: -1; }
  .footer-grid { grid-template-columns: 1.4fr .8fr .8fr; gap: 24px; }
}
@media (max-width: 640px) {
  .header-shell { width: calc(100% - 22px); }
  .brand-mark { width: 38px; height: 38px; border-radius: 12px; }
  .brand-copy strong { font-size: 18px; }
  .search-toggle span:last-child { display: none; }
  .search-toggle { width: 42px; height: 42px; justify-content: center; padding: 0; }
  .hero-shell, .section-shell, .video-split, .page-hero, .article-shell { width: calc(100% - 24px); }
  .hero-shell { margin-bottom: 48px; }
  .hero-copy h1, .page-hero h1 { font-size: 38px; }
  .hero-copy > p, .page-hero p { font-size: 15px; }
  .hero-feature { min-height: 430px; border-radius: 22px; }
  .hero-feature__overlay { left: 20px; right: 20px; bottom: 20px; }
  .hero-feature__overlay h2 { font-size: 25px; }
  .section-shell { margin: 52px auto; }
  .section-heading h2 { font-size: 29px; }
  .compact-stack { grid-template-columns: 1fr; }
  .topic-band { padding: 52px 0; }
  .topic-grid { grid-template-columns: 1fr; }
  .topic-card { min-height: 300px; }
  .story-grid { grid-template-columns: 1fr; }
  .story-grid .story-card:last-child:nth-child(odd) { grid-column: auto; display: block; }
  .timeline-mini { grid-template-columns: 1fr; }
  .verify-strip { padding: 25px; }
  .video-split__copy { margin: -34px 12px 0; padding: 27px; }
  .video-split__copy h2 { font-size: 30px; }
  .page-hero { padding: 28px 22px; }
  .story-card--row { grid-template-columns: 1fr; }
  .story-card--row .story-card__media { min-height: 220px; }
  .evidence-grid, .principle-grid { grid-template-columns: 1fr; }
  .timeline-entry { grid-template-columns: 42px 1fr; gap: 10px; }
  .timeline-entry__index { width: 42px; height: 42px; font-size: 12px; }
  .timeline-feed::before { left: 20px; }
  .callout-card { padding: 25px; }
  .video-stage__guide article { grid-template-columns: 42px 1fr; padding: 16px; }
  .app-layout__copy h2 { font-size: 32px; }
  .article-header { text-align: left; }
  .article-header__meta, .article-tags { justify-content: flex-start; }
  .article-header h1 { font-size: 38px; }
  .article-deck { font-size: 16px; }
  .article-cover { border-radius: 20px; }
  .article-layout { margin-top: 30px; }
  .article-body { font-size: 16px; }
  .article-side { grid-template-columns: 1fr; }
  .search-page__form > div { flex-direction: column; }
  .search-empty { grid-template-columns: 1fr; padding: 20px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid > section:first-child { grid-column: 1 / -1; }
  .footer-bottom { align-items: flex-start; gap: 12px; flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}