:root {
    color-scheme: dark;
    --brand: #C84A5A;
    --brand-deep: #9f3543;
    --copper: #D08A48;
    --accent: #E59A3A;
    --ink: #121214;
    --bg: #17171A;
    --panel: #222226;
    --panel-2: #29292f;
    --line: rgba(241, 238, 238, 0.12);
    --line-strong: rgba(241, 238, 238, 0.2);
    --text: #F1EEEE;
    --muted: #A9A3A6;
    --max: 1180px;
    --reading: 760px;
    --radius: 20px;
    --shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--ink); }
body {
    margin: 0;
    min-width: 320px;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    line-height: 1.72;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}
body.modal-open { overflow: hidden; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }
button, select { color: inherit; }
p, ul, ol, dl, figure { margin-top: 0; }
button { cursor: pointer; }

.shell { width: min(calc(100% - 48px), var(--max)); margin-inline: auto; }
.narrow { max-width: var(--reading); }
.muted { color: var(--muted); }
.sr-only {
    position: absolute;
    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;
    top: 12px;
    left: 12px;
    z-index: 1000;
    transform: translateY(-180%);
    background: var(--accent);
    color: var(--ink);
    padding: 10px 14px;
    border-radius: 10px;
    font-weight: 800;
}
.skip-link:focus { transform: translateY(0); }

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(18, 18, 20, 0.92);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(18px);
}
.header-inner {
    min-height: 78px;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 24px;
}
.brand { display: inline-flex; align-items: center; gap: 12px; min-width: max-content; }
.brand img { width: 44px; height: 44px; object-fit: contain; border-radius: 12px; }
.brand-copy { display: flex; flex-direction: column; line-height: 1.15; }
.brand-copy strong { font-size: 18px; letter-spacing: .02em; }
.brand-copy small { margin-top: 5px; color: var(--muted); font-size: 12px; }
.primary-nav { display: flex; align-items: center; justify-content: center; gap: 4px; }
.primary-nav a {
    padding: 10px 12px;
    border-radius: 10px;
    color: #d7d2d4;
    font-size: 14px;
    transition: background .2s ease, color .2s ease;
}
.primary-nav a:hover, .primary-nav a:focus-visible { background: rgba(255,255,255,.06); color: var(--text); }
.primary-nav a[aria-current="page"] { color: #fff; background: rgba(200, 74, 90, .18); }
.search-trigger {
    border: 1px solid var(--line-strong);
    border-radius: 999px;
    background: transparent;
    padding: 9px 14px;
    font-size: 13px;
}
.search-trigger:hover, .search-trigger:focus-visible { border-color: var(--brand); }
.menu-toggle { display: none; }

.breadcrumbs { width: min(calc(100% - 48px), var(--max)); margin: 22px auto 0; }
.breadcrumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 0; color: var(--muted); font-size: 13px; }
.breadcrumbs li:not(:last-child)::after { content: "/"; margin-left: 8px; color: #66616a; }
.breadcrumbs a:hover { color: var(--text); }

.eyebrow {
    display: inline-block;
    margin-bottom: 12px;
    color: var(--copper);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: .16em;
    text-transform: uppercase;
}
h1, h2, h3 { margin: 0; line-height: 1.2; letter-spacing: -.02em; }
h1 { font-size: clamp(36px, 5vw, 66px); max-width: 12em; }
h2 { font-size: clamp(25px, 3vw, 40px); }
h3 { font-size: 21px; }
p { color: #d4cfd1; }
.section-heading { margin-bottom: 34px; }
.section-heading p { margin: 14px 0 0; font-size: 17px; color: var(--muted); }

.button-group, .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.button {
    display: inline-flex;
    min-height: 46px;
    align-items: center;
    justify-content: center;
    padding: 0 18px;
    border: 1px solid transparent;
    border-radius: 12px;
    font-weight: 800;
    font-size: 14px;
    transition: transform .15s ease, border-color .2s ease, background .2s ease;
}
.button:hover { transform: translateY(-1px); }
.button-primary { background: var(--accent); color: #20150b; }
.button-secondary { background: var(--brand); color: #fff; }
.button-ghost { border-color: var(--line-strong); background: rgba(255,255,255,.02); }
.button-ghost:hover { border-color: var(--copper); }
.text-link { display: inline-flex; gap: 8px; align-items: center; margin-top: 6px; color: #f1c184; font-weight: 750; }
.text-link:hover { color: #ffd8a9; }

.home-hero {
    display: grid;
    grid-template-columns: 1fr;
    gap: 38px;
    align-items: start;
    min-height: 0;
    padding-block: 72px 84px;
}
.hero-copy { position: relative; z-index: 2; max-width: 920px; }
.hero-lead { max-width: 720px; margin: 24px 0 28px; color: #d7d2d4; font-size: 18px; }
.hero-actions { margin-bottom: 34px; }
.hero-facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 0; }
.hero-facts div { padding: 15px 0; border-top: 1px solid var(--line); }
.hero-facts dt { color: var(--muted); font-size: 12px; }
.hero-facts dd { margin: 5px 0 0; font-weight: 800; font-size: 14px; word-break: break-word; }
.hero-visual {
    margin: 0;
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1.55fr) minmax(220px, .45fr);
    gap: 24px;
    align-items: end;
}
.hero-visual::before {
    content: "";
    position: absolute;
    inset: -8% 18% auto -12%;
    height: 70%;
    background: radial-gradient(circle, rgba(200,74,90,.26), transparent 68%);
    filter: blur(20px);
    pointer-events: none;
}
.hero-visual img {
    position: relative;
    width: 100%;
    aspect-ratio: 2.1 / .78;
    object-fit: cover;
    border-radius: 24px;
    box-shadow: var(--shadow);
}
.hero-visual figcaption {
    margin: 0;
    padding: 18px 0 18px 20px;
    border-left: 2px solid rgba(208,138,72,.48);
    color: var(--muted);
    font-size: 14px;
}

.path-section { padding-block: 74px 90px; border-top: 1px solid var(--line); }
.path-list { border-top: 1px solid var(--line); }
.path-row {
    display: grid;
    grid-template-columns: 64px 210px minmax(0,1fr);
    gap: 28px;
    align-items: center;
    padding: 26px 0;
    border-bottom: 1px solid var(--line);
}
.path-number { font-variant-numeric: tabular-nums; color: var(--brand); font-size: 14px; font-weight: 900; }
.path-row img { width: 210px; height: 135px; object-fit: cover; border-radius: 14px; filter: saturate(.88) contrast(1.03); }
.path-copy h3 { margin-bottom: 8px; font-size: 25px; }
.path-copy p { max-width: 760px; margin-bottom: 8px; color: var(--muted); }

.intent-band, .split-band { background: var(--ink); border-block: 1px solid var(--line); }
.intent-band-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: end; padding-block: 56px; }
.intent-band-inner p { margin: 0; color: var(--muted); font-size: 18px; }

.editorial-section {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(360px, .78fr);
    gap: clamp(42px, 7vw, 90px);
    align-items: center;
    padding-block: 86px;
    border-bottom: 1px solid var(--line);
}
.editorial-section.is-reverse { grid-template-columns: minmax(360px, .78fr) minmax(0, 1fr); }
.editorial-section.is-reverse .editorial-copy { order: 2; }
.editorial-section.is-reverse .editorial-media { order: 1; }
.editorial-section.no-media {
    grid-template-columns: minmax(0, 860px);
}
.editorial-section.no-media .editorial-copy { order: initial; }
.editorial-copy h2 { margin-bottom: 22px; }
.editorial-copy p { margin-bottom: 16px; font-size: 16.5px; }
.editorial-media { margin: 0; }
.editorial-media img { width: 100%; aspect-ratio: 1.38 / 1; object-fit: cover; border-radius: 18px; }

.closing-index, .next-links { padding-block: 84px; }
.link-rail { border-top: 1px solid var(--line); }
.link-rail a { display: grid; grid-template-columns: 220px 1fr auto; gap: 20px; padding: 22px 4px; border-bottom: 1px solid var(--line); align-items: center; }
.link-rail a::after { content: "→"; color: var(--copper); }
.link-rail a:hover strong { color: var(--accent); }
.link-rail span { color: var(--muted); }

.page-hero { padding-block: 58px 68px; border-bottom: 1px solid var(--line); }
.page-hero p { max-width: 760px; margin: 20px 0 0; font-size: 17px; color: var(--muted); }
.page-hero .hero-actions { margin-top: 26px; margin-bottom: 0; }
.page-hero-split { display: grid; grid-template-columns: 1fr minmax(340px, .72fr); gap: 58px; align-items: center; }
.page-hero-split img, .compact-hero img { width: 100%; object-fit: cover; border-radius: 22px; }
.page-hero-split img { aspect-ratio: 1.15 / .9; }
.compact-hero { display: grid; grid-template-columns: 1fr 360px; gap: 56px; align-items: center; }
.compact-hero h1 { font-size: clamp(34px, 4.4vw, 58px); }
.compact-hero img { aspect-ratio: 1 / .8; }

.prose-grid { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 64px; padding-block: 72px 90px; align-items: start; }
.article-main > p { font-size: 17px; }
.stacked-topics { margin-top: 54px; }
.stacked-topics article { padding: 30px 0; border-top: 1px solid var(--line); }
.stacked-topics article:last-child { border-bottom: 1px solid var(--line); }
.stacked-topics h2 { font-size: 27px; margin-bottom: 12px; }
.stacked-topics p { margin: 0; color: var(--muted); }
.article-aside { position: sticky; top: 108px; display: grid; gap: 20px; }
.article-aside > img { border-radius: 16px; }
.aside-box { padding: 20px; border: 1px solid var(--line); border-radius: 16px; background: rgba(255,255,255,.025); }
.aside-box h2 { margin-bottom: 14px; font-size: 18px; }
.aside-box ul { margin: 0; padding-left: 19px; color: var(--muted); }
.aside-box a { display: block; padding: 9px 0; border-bottom: 1px solid var(--line); color: #dec8cc; }
.aside-box a:last-child { border-bottom: 0; }
.highlight-box { border-color: rgba(229,154,58,.34); }

.checklist-panel { margin-top: 56px; padding: 32px; background: var(--panel); border-radius: 20px; }
.checklist-panel h2 { margin-bottom: 18px; font-size: 30px; }
.number-checklist { counter-reset: appcheck; list-style: none; padding: 0; margin: 0; }
.number-checklist li { counter-increment: appcheck; position: relative; padding: 16px 0 16px 54px; border-top: 1px solid var(--line); color: #d8d2d4; }
.number-checklist li::before { content: counter(appcheck, decimal-leading-zero); position: absolute; left: 0; color: var(--accent); font-weight: 900; }
.article-callout { margin-block: 70px; padding: 30px 32px; display: flex; justify-content: space-between; align-items: center; gap: 28px; border: 1px solid rgba(208,138,72,.3); border-radius: 20px; background: rgba(208,138,72,.06); }
.article-callout h2 { margin-bottom: 10px; font-size: 28px; }
.article-callout p { max-width: 800px; margin: 0; color: var(--muted); }

.guide-timeline { padding-block: 74px 90px; }
.timeline-list { max-width: 940px; }
.timeline-item { display: grid; grid-template-columns: 90px 1fr; gap: 26px; padding: 28px 0; border-top: 1px solid var(--line); }
.timeline-item:last-child { border-bottom: 1px solid var(--line); }
.timeline-step { color: var(--brand); font-size: 15px; font-weight: 900; }
.timeline-item h3 { margin-bottom: 10px; font-size: 25px; }
.timeline-item p { max-width: 760px; margin: 0; color: var(--muted); }
.two-column-copy { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 76px; padding-block: 64px; }
.two-column-copy h2 { margin-bottom: 14px; font-size: 31px; }
.two-column-copy p { margin-bottom: 12px; color: var(--muted); }

.device-stack { padding-block: 70px 90px; }
.device-row { display: grid; grid-template-columns: 1fr 420px; gap: 68px; align-items: center; padding: 46px 0; border-bottom: 1px solid var(--line); }
.device-row:nth-child(even) { grid-template-columns: 420px 1fr; }
.device-row:nth-child(even) .device-copy { order: 2; }
.device-row img { width: 100%; aspect-ratio: 1.4 / 1; object-fit: cover; border-radius: 16px; }
.device-copy h2 { margin-bottom: 16px; }
.clean-list { list-style: none; padding: 0; margin: 0; }
.clean-list li { position: relative; padding: 13px 0 13px 28px; border-top: 1px solid var(--line); color: var(--muted); }
.clean-list li::before { content: ""; position: absolute; left: 2px; top: 25px; width: 8px; height: 8px; border-radius: 50%; background: var(--copper); }

.signal-table { padding-block: 74px 90px; }
.signal-list { border-top: 1px solid var(--line); }
.signal-row { display: grid; grid-template-columns: 220px 1fr 1fr; gap: 28px; padding: 26px 0; border-bottom: 1px solid var(--line); align-items: start; }
.signal-row h3 { font-size: 20px; }
.signal-good, .signal-risk { padding-left: 18px; border-left: 2px solid var(--line); }
.signal-good { border-left-color: rgba(208,138,72,.7); }
.signal-risk { border-left-color: rgba(200,74,90,.7); }
.signal-good strong, .signal-risk strong { display: block; margin-bottom: 7px; font-size: 13px; }
.signal-good p, .signal-risk p { margin: 0; color: var(--muted); }

.submission-list { padding-block: 72px 90px; max-width: 980px; }
.submission-item { display: grid; grid-template-columns: 80px 1fr; gap: 26px; padding: 30px 0; border-top: 1px solid var(--line); }
.submission-item:last-child { border-bottom: 1px solid var(--line); }
.submission-index { color: var(--brand); font-weight: 900; }
.submission-item h3 { margin-bottom: 10px; font-size: 25px; }
.submission-item p { margin: 0; color: var(--muted); }

.help-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 20px; padding-block: 72px 30px; }
.help-card { padding: 28px; background: var(--panel); border: 1px solid var(--line); border-radius: 18px; }
.help-card:nth-child(3n) { grid-column: span 2; }
.help-card-head { padding-bottom: 16px; border-bottom: 1px solid var(--line); }
.help-card h2 { margin-bottom: 8px; font-size: 26px; }
.help-card p { margin: 0; color: var(--muted); }
.help-card ol { margin: 18px 0 0; padding-left: 22px; color: #d4cfd1; }
.help-card li + li { margin-top: 10px; }

.faq-section { max-width: 980px; padding-block: 64px 90px; }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item:first-child { border-top: 1px solid var(--line); }
.faq-item h2 { font-size: 20px; }
.faq-item button { width: 100%; display: flex; justify-content: space-between; gap: 24px; align-items: center; padding: 22px 0; color: var(--text); background: transparent; border: 0; text-align: left; font-weight: 800; }
.faq-icon { flex: 0 0 auto; width: 30px; height: 30px; border: 1px solid var(--line); border-radius: 50%; display: grid; place-items: center; transition: transform .2s ease; }
.faq-item button[aria-expanded="true"] .faq-icon { transform: rotate(45deg); border-color: var(--copper); }
.faq-answer { padding: 0 54px 24px 0; }
.faq-answer p { margin: 0; color: var(--muted); }
.faq-answer[hidden] { display: none; }

.principle-list, .privacy-list { padding-block: 72px 86px; max-width: 980px; }
.principle-list article, .privacy-list article { display: grid; grid-template-columns: 290px 1fr; gap: 40px; padding: 28px 0; border-top: 1px solid var(--line); }
.principle-list article:last-child, .privacy-list article:last-child { border-bottom: 1px solid var(--line); }
.principle-list h3, .privacy-list h3 { font-size: 22px; }
.principle-list p, .privacy-list p { margin: 0; color: var(--muted); }

.safety-grid { padding-block: 72px 90px; }
.safety-list { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 14px; }
.safety-list li { display: grid; grid-template-columns: 48px 1fr; gap: 14px; padding: 22px; border: 1px solid var(--line); border-radius: 16px; background: rgba(255,255,255,.02); }
.safety-list li:last-child { grid-column: span 2; }
.safety-list span { color: var(--accent); font-weight: 900; }
.safety-list p { margin: 0; color: #d8d2d4; }

.contact-layout { display: grid; grid-template-columns: minmax(0,1fr) 300px; gap: 64px; padding-block: 70px 90px; align-items: start; }
.topic-form { margin: 0 0 30px; padding: 20px; background: var(--panel); border-radius: 16px; }
.topic-form label, .search-form label { display: block; margin-bottom: 9px; color: var(--muted); font-size: 13px; font-weight: 700; }
.search-line { display: flex; gap: 10px; }
.search-line input, .search-line select {
    width: 100%;
    min-height: 46px;
    padding: 0 14px;
    border: 1px solid var(--line-strong);
    border-radius: 10px;
    background: #151518;
    color: var(--text);
    outline: none;
}
.search-line input:focus, .search-line select:focus { border-color: var(--copper); box-shadow: 0 0 0 3px rgba(208,138,72,.12); }
.contact-cards { display: grid; gap: 14px; }
.contact-cards article { padding: 24px; border: 1px solid var(--line); border-radius: 16px; }
.contact-cards h3 { margin-bottom: 10px; }
.contact-cards ul { margin: 0; padding-left: 20px; color: var(--muted); }

.search-page { padding-block: 68px 100px; }
.search-page-form { max-width: 760px; margin-bottom: 44px; }
.search-suggestions { margin-top: 28px; }
.search-suggestions h2 { margin-bottom: 14px; font-size: 22px; }
.tag-list { display: flex; flex-wrap: wrap; gap: 10px; }
.tag-list a { padding: 8px 13px; border: 1px solid var(--line); border-radius: 999px; color: #d8d2d4; }
.tag-list a:hover { border-color: var(--copper); }
.search-results { max-width: 900px; }
.search-results > h2 { margin-bottom: 14px; font-size: 22px; color: var(--muted); }
.search-results article { padding: 24px 0; border-top: 1px solid var(--line); }
.search-results article:last-child { border-bottom: 1px solid var(--line); }
.search-results h3 { margin-bottom: 8px; font-size: 25px; }
.search-results h3 a:hover { color: var(--accent); }
.search-results p { margin-bottom: 8px; color: var(--muted); }
.empty-state { max-width: 760px; padding: 34px; background: var(--panel); border-radius: 18px; }
.empty-state h2 { margin-bottom: 12px; }
.not-found { min-height: 620px; display: flex; flex-direction: column; justify-content: center; align-items: flex-start; }
.not-found p { max-width: 680px; margin: 22px 0 28px; color: var(--muted); font-size: 18px; }

.search-modal[hidden] { display: none !important; }
.search-modal { position: fixed; inset: 0; z-index: 300; display: grid; place-items: start center; padding: 12vh 24px 24px; }
.search-backdrop { position: absolute; inset: 0; background: rgba(0,0,0,.72); backdrop-filter: blur(8px); }
.search-dialog { position: relative; width: min(680px, 100%); padding: 26px; background: #202024; border: 1px solid var(--line-strong); border-radius: 20px; box-shadow: var(--shadow); }
.search-dialog-head { display: flex; justify-content: space-between; gap: 20px; align-items: flex-start; margin-bottom: 18px; }
.search-dialog-head h2 { font-size: 28px; }
.icon-button { width: 40px; height: 40px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; background: transparent; font-size: 24px; }
.search-dialog .muted { margin: 14px 0 0; font-size: 13px; }

.site-footer { background: var(--ink); border-top: 1px solid var(--line); }
.footer-grid { display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: 54px; padding-block: 58px 46px; }
.footer-brand { display: grid; grid-template-columns: 52px 1fr; gap: 16px; align-items: start; }
.footer-brand img { border-radius: 13px; }
.footer-brand h2, .footer-group h2 { font-size: 16px; margin-bottom: 12px; }
.footer-brand p { max-width: 360px; margin: 0; color: var(--muted); font-size: 14px; }
.footer-group { display: flex; flex-direction: column; gap: 8px; }
.footer-group a { color: var(--muted); font-size: 14px; }
.footer-group a:hover { color: var(--text); }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-block: 18px 26px; border-top: 1px solid var(--line); }
.footer-bottom p { margin: 0; color: #7f7a7d; font-size: 12px; }
.back-to-top {
    position: fixed;
    right: 22px;
    bottom: 22px;
    z-index: 80;
    width: 44px;
    height: 44px;
    border: 1px solid var(--line-strong);
    border-radius: 50%;
    background: #26262a;
    color: var(--text);
    opacity: 0;
    transform: translateY(12px);
    pointer-events: none;
    transition: opacity .2s ease, transform .2s ease;
}
.back-to-top.is-visible { opacity: 1; transform: translateY(0); pointer-events: auto; }

@media (max-width: 1050px) {
    .header-inner { grid-template-columns: auto 1fr auto auto; }
    .menu-toggle { display: inline-grid; place-items: center; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 12px; background: transparent; }
    .menu-toggle-lines, .menu-toggle-lines::before, .menu-toggle-lines::after { width: 18px; height: 2px; background: var(--text); display: block; position: relative; content: ""; }
    .menu-toggle-lines::before { position: absolute; top: -6px; }
    .menu-toggle-lines::after { position: absolute; top: 6px; }
    .primary-nav {
        display: none;
        position: absolute;
        top: calc(100% + 1px);
        left: 24px;
        right: 24px;
        padding: 14px;
        flex-direction: column;
        align-items: stretch;
        background: #1b1b1e;
        border: 1px solid var(--line);
        border-radius: 16px;
        box-shadow: var(--shadow);
    }
    .primary-nav.is-open { display: flex; }
    .primary-nav a { padding: 12px 14px; }
    .menu-toggle { order: 3; }
    .search-trigger { order: 4; }
    .home-hero { grid-template-columns: 1fr; min-height: 0; padding-block: 56px 70px; }
    .hero-visual { max-width: none; }
    .editorial-section, .editorial-section.is-reverse { grid-template-columns: 1fr 360px; gap: 42px; }
    .editorial-section.no-media { grid-template-columns: minmax(0, 860px); }
    .editorial-section.is-reverse .editorial-copy, .editorial-section.is-reverse .editorial-media { order: initial; }
    .page-hero-split, .compact-hero { grid-template-columns: 1fr 330px; gap: 40px; }
    .prose-grid, .contact-layout { grid-template-columns: 1fr 270px; gap: 42px; }
    .device-row, .device-row:nth-child(even) { grid-template-columns: 1fr 360px; gap: 42px; }
    .device-row:nth-child(even) .device-copy { order: initial; }
    .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
    .footer-group:last-child { grid-column: 2 / -1; display: grid; grid-template-columns: repeat(2, 1fr); }
    .footer-group:last-child h2 { grid-column: 1 / -1; }
}

@media (max-width: 820px) {
    .shell, .breadcrumbs { width: min(calc(100% - 32px), var(--max)); }
    .search-trigger { display: none; }
    .header-inner { grid-template-columns: auto 1fr auto; min-height: 70px; gap: 16px; }
    .brand-copy small { display: none; }
    .home-hero, .page-hero-split, .compact-hero, .editorial-section, .editorial-section.is-reverse, .prose-grid, .contact-layout, .device-row, .device-row:nth-child(even), .signal-row, .principle-list article, .privacy-list article { grid-template-columns: 1fr; }
    .hero-visual { grid-template-columns: 1fr; }
    .hero-visual figcaption { padding: 14px 0 0; border-left: 0; border-top: 1px solid var(--line); }
    .hero-facts { grid-template-columns: 1fr; }
    .hero-facts div { display: grid; grid-template-columns: 110px 1fr; gap: 20px; }
    .path-row { grid-template-columns: 48px 150px 1fr; gap: 18px; }
    .path-row img { width: 150px; height: 104px; }
    .intent-band-inner, .two-column-copy { grid-template-columns: 1fr; gap: 28px; }
    .editorial-section, .editorial-section.is-reverse { padding-block: 62px; }
    .editorial-media { max-width: 640px; }
    .page-hero-split img, .compact-hero img { max-width: 640px; }
    .article-aside { position: static; grid-template-columns: repeat(2, minmax(0,1fr)); }
    .article-aside > img { grid-column: 1 / -1; max-width: 520px; }
    .help-grid { grid-template-columns: 1fr; }
    .help-card:nth-child(3n) { grid-column: auto; }
    .safety-list { grid-template-columns: 1fr; }
    .safety-list li:last-child { grid-column: auto; }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-brand { grid-column: 1 / -1; }
    .footer-group:last-child { grid-column: auto; display: flex; }
    .link-rail a { grid-template-columns: 160px 1fr auto; }
}

@media (max-width: 600px) {
    .shell, .breadcrumbs { width: min(calc(100% - 24px), var(--max)); }
    h1 { font-size: clamp(34px, 11vw, 48px); }
    h2 { font-size: 28px; }
    .site-header { backdrop-filter: none; }
    .brand img { width: 40px; height: 40px; }
    .brand-copy strong { font-size: 16px; }
    .primary-nav { left: 12px; right: 12px; }
    .home-hero { padding-block: 42px 56px; gap: 34px; }
    .hero-lead { font-size: 16px; }
    .hero-actions, .button-group { align-items: stretch; }
    .button { width: 100%; }
    .hero-facts div { grid-template-columns: 92px 1fr; }
    .path-section { padding-block: 58px 68px; }
    .path-row { grid-template-columns: 40px 1fr; padding: 24px 0; }
    .path-row img { grid-column: 2; width: 100%; height: auto; aspect-ratio: 1.6 / 1; }
    .path-copy { grid-column: 2; }
    .intent-band-inner { padding-block: 44px; }
    .editorial-section, .editorial-section.is-reverse { gap: 28px; padding-block: 52px; }
    .page-hero { padding-block: 40px 48px; }
    .page-hero p { font-size: 16px; }
    .page-hero-split, .compact-hero { gap: 28px; }
    .prose-grid, .contact-layout { padding-block: 54px 70px; }
    .article-aside { grid-template-columns: 1fr; }
    .article-aside > img { grid-column: auto; }
    .checklist-panel { padding: 24px 20px; }
    .article-callout { margin-block: 54px; padding: 24px; flex-direction: column; align-items: stretch; }
    .timeline-item { grid-template-columns: 48px 1fr; gap: 14px; }
    .device-stack, .signal-table, .submission-list, .safety-grid { padding-block: 56px 68px; }
    .device-row { padding: 34px 0; gap: 26px; }
    .signal-row { gap: 14px; }
    .signal-good, .signal-risk { padding-left: 14px; }
    .submission-item { grid-template-columns: 46px 1fr; gap: 12px; }
    .help-card { padding: 22px; }
    .faq-answer { padding-right: 0; }
    .principle-list article, .privacy-list article { gap: 12px; }
    .search-line { flex-direction: column; }
    .search-line .button { width: 100%; }
    .link-rail a { grid-template-columns: 1fr auto; gap: 8px 14px; }
    .link-rail span { grid-column: 1 / -1; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .footer-brand, .footer-group:last-child { grid-column: auto; }
    .footer-bottom { flex-direction: column; gap: 5px; }
    .search-modal { padding: 8vh 12px 12px; }
    .search-dialog { padding: 20px; }
}

@media (max-width: 390px) {
    .brand-copy { display: none; }
    .header-inner { grid-template-columns: auto 1fr auto; }
    .menu-toggle { grid-column: 3; }
    .home-hero { padding-top: 34px; }
    .hero-facts div { display: block; }
    .hero-facts dd { margin-top: 4px; }
    .path-row { grid-template-columns: 32px 1fr; gap: 10px; }
    .back-to-top { right: 14px; bottom: 14px; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}