/* 91浏览器内容站样式 */
:root {
    --primary: #6F5AE8;
    --primary-soft: #9A8CF2;
    --dark: #242433;
    --bg: #F8F8FC;
    --bg-soft: #F0EEFA;
    --text: #30303A;
    --muted: #70707D;
    --accent: #F29A4A;
    --white: #FFFFFF;
    --line: #DEDBEC;
    --line-dark: rgba(255,255,255,.14);
    --shadow: 0 18px 48px rgba(45, 39, 92, .10);
    --radius-lg: 28px;
    --radius-md: 18px;
    --radius-sm: 12px;
    --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    min-width: 320px;
    color: var(--text);
    background: var(--bg);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}
body.modal-open { overflow: hidden; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: #5744D6; }
button, input { font: inherit; }
button { cursor: pointer; }
.container { width: min(calc(100% - 40px), var(--container)); margin-inline: auto; }
.skip-link {
    position: fixed;
    left: 16px;
    top: 12px;
    transform: translateY(-160%);
    z-index: 300;
    padding: 10px 14px;
    border-radius: 10px;
    background: var(--dark);
    color: var(--white);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(248,248,252,.95);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(111,90,232,.11);
}
.header-shell {
    width: min(calc(100% - 32px), 1240px);
    min-height: 76px;
    margin-inline: auto;
    display: flex;
    align-items: center;
    gap: 18px;
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--dark);
    text-decoration: none;
    font-weight: 800;
    letter-spacing: -.02em;
    white-space: nowrap;
}
.brand img { width: 42px; height: 42px; object-fit: contain; }
.primary-nav { margin-left: auto; display: flex; gap: 4px; align-items: center; }
.primary-nav a {
    padding: 10px 11px;
    color: #4D4D5A;
    text-decoration: none;
    border-radius: 10px;
    font-size: 14px;
    white-space: nowrap;
}
.primary-nav a:hover { background: var(--bg-soft); color: var(--primary); }
.search-trigger, .menu-toggle {
    border: 1px solid var(--line);
    background: var(--white);
    color: var(--dark);
    padding: 10px 14px;
    border-radius: 12px;
}
.menu-toggle { display: none; }
.search-trigger:hover, .menu-toggle:hover { border-color: var(--primary-soft); }

.search-modal[hidden] { display: none !important; }
.search-modal {
    position: fixed;
    inset: 0;
    z-index: 250;
    background: rgba(25,25,38,.58);
    display: grid;
    place-items: start center;
    padding: min(13vh, 120px) 20px 20px;
}
.search-modal__panel {
    width: min(660px, 100%);
    position: relative;
    padding: 34px;
    background: var(--white);
    border-radius: 24px;
    box-shadow: 0 30px 80px rgba(0,0,0,.25);
}
.search-modal__panel h2 { margin: 0 0 8px; font-size: 28px; }
.search-modal__panel p { margin: 0 0 24px; color: var(--muted); }
.search-modal__close {
    position: absolute;
    top: 18px;
    right: 18px;
    border: 0;
    background: var(--bg-soft);
    color: var(--dark);
    padding: 7px 11px;
    border-radius: 9px;
}
.search-form label { display: block; margin-bottom: 8px; font-weight: 700; }
.search-form__row { display: flex; gap: 10px; }
.search-form input {
    min-width: 0;
    flex: 1;
    border: 1px solid #C9C5DE;
    background: var(--white);
    color: var(--text);
    padding: 13px 14px;
    border-radius: 12px;
    outline: none;
}
.search-form input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(111,90,232,.11); }
.search-form button {
    border: 0;
    background: var(--primary);
    color: var(--white);
    padding: 12px 20px;
    border-radius: 12px;
    font-weight: 700;
}

.hero { padding: 72px 0 64px; overflow: hidden; }
.hero--home { background: linear-gradient(180deg, #FBFAFF 0%, #F8F8FC 100%); }
.hero__grid { display: grid; grid-template-columns: 1.08fr .92fr; gap: 58px; align-items: center; }
.eyebrow {
    margin: 0 0 12px;
    color: var(--primary);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: .11em;
    text-transform: uppercase;
}
.hero h1, .page-hero h1 {
    margin: 0;
    color: var(--dark);
    letter-spacing: -.045em;
    line-height: 1.12;
}
.hero h1 { font-size: clamp(40px, 5.3vw, 72px); max-width: 930px; }
.hero__lead { margin: 24px 0 0; max-width: 780px; color: #555563; font-size: 18px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 11px 18px;
    border-radius: 13px;
    text-decoration: none;
    font-weight: 800;
    transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.button:hover { transform: translateY(-1px); }
.button--primary { background: var(--primary); color: var(--white); box-shadow: 0 12px 26px rgba(111,90,232,.22); }
.button--primary:hover { color: var(--white); background: #5F4BDB; }
.button--accent { background: var(--accent); color: #2D2217; box-shadow: 0 12px 26px rgba(242,154,74,.20); }
.button--accent:hover { color: #22170D; background: #EE8F39; }
.button--ghost { background: var(--white); color: var(--dark); border: 1px solid var(--line); }
.button--ghost:hover { color: var(--primary); border-color: var(--primary-soft); }
.hero__facts { list-style: none; padding: 0; margin: 34px 0 0; display: grid; gap: 14px; }
.hero__facts li { display: grid; grid-template-columns: 100px 1fr; gap: 14px; align-items: baseline; }
.hero__facts strong { color: var(--dark); }
.hero__facts span { color: var(--muted); font-size: 14px; }
.hero__visual { margin: 0; background: var(--white); border: 1px solid #E7E4F3; border-radius: 30px; overflow: hidden; box-shadow: var(--shadow); }
.hero__visual img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.hero__visual figcaption { padding: 18px 20px 20px; color: var(--muted); font-size: 14px; }

.section { padding: 78px 0; }
.section--compact { padding: 56px 0; }
.section--tint { background: var(--bg-soft); }
.section--dark { background: var(--dark); color: #EDECF7; }
.split-intro { display: grid; grid-template-columns: .82fr 1.18fr; gap: 48px; align-items: end; margin-bottom: 34px; }
.split-intro h2, .section-heading h2, .editorial-copy h2, .topic-band h2, .download-band h2, .about-strip h2, .faq-preview h2 {
    margin: 0;
    color: var(--dark);
    line-height: 1.2;
    letter-spacing: -.025em;
    font-size: clamp(29px, 3.5vw, 44px);
}
.split-intro > p { margin: 0; color: var(--muted); font-size: 16px; }
.intent-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.intent-panel { min-height: 315px; padding: 30px; background: var(--white); border-radius: 22px; border: 1px solid rgba(111,90,232,.11); display: flex; flex-direction: column; }
.intent-panel--feature { background: var(--primary); color: var(--white); }
.intent-panel__number { font-size: 14px; font-weight: 900; letter-spacing: .15em; color: var(--primary-soft); }
.intent-panel h3 { margin: 42px 0 12px; font-size: 24px; color: var(--dark); }
.intent-panel p { margin: 0 0 20px; color: var(--muted); }
.intent-panel a { margin-top: auto; font-weight: 800; }
.intent-panel--feature .intent-panel__number, .intent-panel--feature p, .intent-panel--feature a { color: #F4F1FF; }
.intent-panel--feature h3 { color: var(--white); }

.editorial-split { display: grid; grid-template-columns: .92fr 1.08fr; gap: 54px; align-items: center; }
.editorial-image { margin: 0; border-radius: 26px; overflow: hidden; box-shadow: var(--shadow); }
.editorial-image img { width: 100%; aspect-ratio: 5 / 4; object-fit: cover; }
.editorial-copy > p:not(.eyebrow) { color: var(--muted); }
.step-list { list-style: none; padding: 0; margin: 28px 0; display: grid; gap: 12px; }
.step-list li { display: grid; grid-template-columns: 130px 1fr; gap: 14px; padding: 13px 0; border-bottom: 1px solid var(--line); }
.step-list strong { color: var(--dark); }
.step-list span { color: var(--muted); }
.link-row { display: flex; flex-wrap: wrap; gap: 10px 22px; }
.link-row a, .text-link { font-weight: 800; }

.section-heading { max-width: 760px; margin-bottom: 34px; }
.section-heading p:not(.eyebrow) { color: var(--muted); }
.section-heading--light h2 { color: var(--white); }
.section-heading--light p:not(.eyebrow) { color: #BEBBD0; }
.section-heading--light .eyebrow { color: #C8BEFF; }
.route-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 16px; }
.route-card { overflow: hidden; background: #302F42; border: 1px solid var(--line-dark); border-radius: 18px; }
.route-card img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; opacity: .92; }
.route-card__body { padding: 20px; }
.route-card h3 { margin: 0 0 9px; line-height: 1.35; font-size: 19px; }
.route-card h3 a { color: var(--white); text-decoration: none; }
.route-card p { margin: 0; color: #C5C2D2; font-size: 14px; }
.tag-list { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; padding: 0; margin: 16px 0 0; }
.tag-list li { font-size: 12px; color: #D8D4EA; background: rgba(255,255,255,.07); border-radius: 999px; padding: 5px 8px; }

.topic-band, .download-band, .about-strip { display: grid; grid-template-columns: 1.05fr .95fr; gap: 40px; align-items: center; }
.topic-band { padding: 34px; border: 1px solid var(--line); border-radius: 28px; background: var(--white); }
.topic-band img, .download-band img, .about-strip img { width: 100%; border-radius: 20px; aspect-ratio: 16 / 10; object-fit: cover; }
.topic-band p:not(.eyebrow), .download-band p:not(.eyebrow), .about-strip p:not(.eyebrow) { color: var(--muted); }
.download-band { grid-template-columns: .9fr 1.1fr; }
.check-list { padding-left: 0; list-style: none; margin: 24px 0; display: grid; gap: 10px; }
.check-list li { position: relative; padding-left: 28px; }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--primary); font-weight: 900; }
.check-list--columns { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px 26px; }

.guide-lanes { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.guide-lanes article { padding: 28px; border: 1px solid var(--line); border-radius: 20px; background: var(--white); }
.guide-lanes h3 { margin: 0 0 8px; font-size: 23px; }
.guide-lanes p { color: var(--muted); }
.guide-lanes ul { padding-left: 20px; margin: 18px 0 0; }
.guide-lanes li + li { margin-top: 8px; }
.visual-notes { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.visual-notes figure { margin: 0; overflow: hidden; border-radius: 18px; background: var(--white); border: 1px solid var(--line); }
.visual-notes img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
.visual-notes figcaption { padding: 18px; display: grid; gap: 4px; }
.visual-notes figcaption span { color: var(--muted); font-size: 14px; }
.faq-preview { display: grid; grid-template-columns: .8fr 1.2fr; gap: 50px; }
.faq-preview__intro > p:not(.eyebrow) { color: var(--muted); }
.faq-preview__list { display: grid; gap: 10px; }
details { background: var(--white); border: 1px solid var(--line); border-radius: 14px; }
summary { padding: 17px 20px; cursor: pointer; font-weight: 800; color: var(--dark); }
details p { padding: 0 20px 20px; margin: 0; color: var(--muted); }

.page-shell { padding-top: 28px; padding-bottom: 80px; }
.breadcrumb { font-size: 13px; color: var(--muted); margin-bottom: 28px; }
.breadcrumb ol { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 0; list-style: none; }
.breadcrumb li:not(:last-child)::after { content: "/"; margin-left: 8px; color: #A7A3B6; }
.breadcrumb a { color: var(--muted); }
.page-hero { padding: 30px 0 46px; max-width: 900px; }
.page-hero h1 { font-size: clamp(36px, 4.8vw, 58px); }
.page-hero > p:last-child, .page-hero > div > p:last-child { margin-top: 18px; color: var(--muted); font-size: 17px; }
.page-hero--visual { max-width: none; display: grid; grid-template-columns: 1.14fr .86fr; gap: 44px; align-items: center; }
.page-hero--visual img { border-radius: 24px; aspect-ratio: 16 / 10; object-fit: cover; box-shadow: var(--shadow); }

.prose-section { max-width: 920px; margin: 44px 0; }
.prose-section--tint { max-width: none; padding: 34px; border-radius: 22px; background: var(--bg-soft); }
.prose-section h2, .info-layout h2, .media-note h2, .next-steps h2, .guide-index h2, .settings-grid h2, .diagnostic-flow h2, .security-matrix h2, .principle-grid h2, .privacy-grid h2, .feedback-template h2 {
    margin: 0 0 12px;
    color: var(--dark);
    line-height: 1.28;
    letter-spacing: -.02em;
    font-size: 28px;
}
.prose-section h3 { margin: 0 0 8px; color: var(--dark); }
.prose-section p { color: #545461; }
.four-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 14px; margin-top: 26px; }
.four-grid article { background: var(--white); border: 1px solid var(--line); border-radius: 16px; padding: 20px; }
.four-grid span { color: var(--primary); font-weight: 900; font-size: 13px; }
.four-grid h3 { font-size: 20px; margin: 18px 0 8px; }
.four-grid p { margin: 0; font-size: 14px; color: var(--muted); }
.three-notes { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; margin-top: 24px; }
.three-notes article { padding: 22px; border-radius: 16px; background: rgba(255,255,255,.78); border: 1px solid rgba(111,90,232,.10); }
.three-notes p { margin: 0; font-size: 14px; }
.notice { max-width: 920px; margin: 10px 0 34px; padding: 18px 20px; border-radius: 16px; border-left: 4px solid var(--primary); background: #EFEDFF; }
.notice strong { display: block; margin-bottom: 4px; color: var(--dark); }
.notice p { margin: 0; color: var(--muted); }
.notice--warning { background: #FFF5E9; border-left-color: var(--accent); }
.notice--success { background: #EEF8F1; border-left-color: #55A56C; }

.info-layout { display: grid; grid-template-columns: 1.25fr .75fr; gap: 26px; align-items: start; margin: 50px 0; }
.info-layout__main, .side-card { padding: 30px; background: var(--white); border: 1px solid var(--line); border-radius: 20px; }
.side-card { position: sticky; top: 102px; }
.plain-links { list-style: none; padding: 0; margin: 16px 0 0; }
.plain-links li + li { border-top: 1px solid var(--line); margin-top: 12px; padding-top: 12px; }
.plain-links a { font-weight: 750; }
.timeline-list { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 14px; }
.timeline-list li { display: grid; grid-template-columns: 42px 1fr; gap: 14px; }
.timeline-list > li > span { width: 38px; height: 38px; display: grid; place-items: center; background: var(--bg-soft); color: var(--primary); border-radius: 12px; font-weight: 900; }
.timeline-list h3 { margin: 0 0 4px; font-size: 18px; }
.timeline-list p { margin: 0; color: var(--muted); }
.timeline-list--simple { max-width: 840px; }
.media-note { margin: 54px 0; display: grid; grid-template-columns: .86fr 1.14fr; gap: 30px; align-items: center; padding: 26px; border: 1px solid var(--line); border-radius: 22px; background: var(--white); }
.media-note--reverse { grid-template-columns: 1.14fr .86fr; }
.media-note--reverse img { order: 2; }
.media-note img { width: 100%; border-radius: 16px; aspect-ratio: 16 / 10; object-fit: cover; }
.media-note p { color: var(--muted); }
.media-note a { font-weight: 800; }
.decision-table { border: 1px solid var(--line); border-radius: 16px; overflow: hidden; margin-top: 28px; }
.decision-row { display: grid; grid-template-columns: 1.2fr .8fr; }
.decision-row span { padding: 14px 16px; border-top: 1px solid var(--line); }
.decision-row span + span { border-left: 1px solid var(--line); }
.decision-row--head { background: var(--dark); color: var(--white); font-weight: 800; }
.decision-row--head span { border-top: 0; }
.download-path { margin: 50px 0; display: grid; grid-template-columns: .9fr 1.1fr; gap: 34px; align-items: center; }
.download-path > img { width: 100%; border-radius: 24px; aspect-ratio: 4/3; object-fit: cover; }
.step-list--compact li { grid-template-columns: 105px 1fr; }
.next-steps { margin: 54px 0 0; }
.next-steps__grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
.next-steps__grid a { display: grid; gap: 7px; padding: 22px; border: 1px solid var(--line); border-radius: 16px; background: var(--white); text-decoration: none; color: var(--dark); }
.next-steps__grid a:hover { border-color: var(--primary-soft); }
.next-steps__grid span { color: var(--muted); font-size: 14px; }

.guide-index { margin: 30px 0 48px; display: grid; gap: 16px; }
.guide-index article { display: grid; grid-template-columns: 64px 1fr; gap: 18px; padding: 28px; background: var(--white); border: 1px solid var(--line); border-radius: 20px; }
.guide-index__num { width: 54px; height: 54px; display: grid; place-items: center; border-radius: 16px; background: var(--primary); color: var(--white); font-weight: 900; }
.guide-index p { color: var(--muted); }
.guide-index ul { padding-left: 20px; }
.link-cards { display: grid; grid-template-columns: repeat(2,1fr); gap: 14px; margin-top: 24px; }
.link-cards a { padding: 22px; border: 1px solid var(--line); background: var(--white); border-radius: 16px; text-decoration: none; display: grid; gap: 6px; }
.link-cards strong { color: var(--dark); }
.link-cards span { color: var(--muted); font-size: 14px; }
.settings-grid, .security-matrix, .principle-grid, .privacy-grid, .feedback-template { display: grid; grid-template-columns: repeat(2,1fr); gap: 16px; margin: 24px 0 48px; }
.settings-grid article, .security-matrix article, .principle-grid article, .privacy-grid article, .feedback-template article { padding: 26px; background: var(--white); border: 1px solid var(--line); border-radius: 18px; }
.settings-grid article > span, .feedback-template article > span { display: inline-block; margin-bottom: 14px; padding: 4px 9px; border-radius: 999px; background: var(--bg-soft); color: var(--primary); font-weight: 800; font-size: 12px; }
.settings-grid h2, .security-matrix h2, .principle-grid h2, .privacy-grid h2, .feedback-template h2 { font-size: 22px; }
.settings-grid p, .security-matrix p, .principle-grid p, .privacy-grid p, .feedback-template p { margin: 0; color: var(--muted); }
.diagnostic-flow { display: grid; grid-template-columns: repeat(5,1fr); gap: 12px; margin: 24px 0 54px; }
.diagnostic-flow article { padding: 22px; background: var(--dark); color: var(--white); border-radius: 18px; }
.diagnostic-flow span { color: #C8BEFF; font-weight: 900; font-size: 12px; letter-spacing: .12em; }
.diagnostic-flow h2 { color: var(--white); font-size: 20px; margin-top: 20px; }
.diagnostic-flow p { color: #C7C4D2; font-size: 14px; margin: 0; }

.faq-list { max-width: 920px; display: grid; gap: 10px; margin: 20px 0 50px; }
.faq-list details { background: var(--white); }
.faq-list summary { font-size: 17px; }
.faq-answer { border-top: 1px solid var(--line); }
.faq-answer p { padding-top: 18px; }
.search-form--page { max-width: 720px; margin-top: 28px; }
.search-suggestions { display: flex; flex-wrap: wrap; gap: 10px; }
.search-suggestions a { padding: 8px 12px; background: var(--white); border: 1px solid var(--line); border-radius: 999px; text-decoration: none; }
.search-results { max-width: 900px; }
.search-results > h2 { margin-bottom: 20px; }
.search-results article { padding: 24px 0; border-top: 1px solid var(--line); }
.search-results h3 { margin: 0 0 8px; font-size: 22px; }
.search-results p { color: var(--muted); }
.empty-state, .error-state { padding: 70px 0 100px; }
.empty-state h2 { font-size: 34px; }
.error-state { text-align: center; }
.error-code { margin: 0; color: var(--primary); font-size: clamp(76px, 14vw, 150px); line-height: 1; font-weight: 900; letter-spacing: -.07em; }
.error-state h1 { margin: 16px 0 10px; color: var(--dark); font-size: clamp(34px,5vw,54px); }
.error-state > p:not(.error-code) { max-width: 720px; margin: 0 auto 34px; color: var(--muted); }
.error-state .next-steps__grid { text-align: left; }

.site-footer { padding: 58px 0 24px; background: #20202D; color: #D4D2DF; }
.footer-grid { width: min(calc(100% - 40px), var(--container)); margin-inline: auto; display: grid; grid-template-columns: 1.3fr .85fr .85fr; gap: 50px; }
.site-footer h2 { margin: 0 0 12px; color: var(--white); font-size: 18px; }
.site-footer p { margin: 0; color: #AAA7B8; }
.site-footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.site-footer a { color: #D8D5E4; text-decoration: none; }
.site-footer a:hover { color: var(--white); }
.footer-bottom { width: min(calc(100% - 40px), var(--container)); margin: 38px auto 0; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.09); display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.back-top { border: 1px solid rgba(255,255,255,.18); background: transparent; color: var(--white); border-radius: 10px; padding: 8px 12px; }

@media (max-width: 1100px) {
    .header-shell { flex-wrap: wrap; padding: 12px 0; }
    .menu-toggle { display: inline-flex; margin-left: auto; }
    .primary-nav { display: none; width: 100%; order: 4; margin: 0; padding-top: 4px; border-top: 1px solid var(--line); flex-wrap: wrap; }
    .primary-nav.is-open { display: flex; }
    .search-trigger { margin-left: 0; }
    .hero__grid, .editorial-split, .page-hero--visual { gap: 36px; }
    .route-grid { grid-template-columns: repeat(2,1fr); }
    .diagnostic-flow { grid-template-columns: repeat(3,1fr); }
    .four-grid { grid-template-columns: repeat(2,1fr); }
}

@media (max-width: 900px) {
    .hero { padding-top: 52px; }
    .hero__grid, .editorial-split, .split-intro, .faq-preview, .info-layout, .page-hero--visual, .topic-band, .download-band, .about-strip, .download-path, .media-note, .media-note--reverse { grid-template-columns: 1fr; }
    .page-hero--visual img { max-height: 420px; }
    .media-note--reverse img { order: 0; }
    .intent-grid, .guide-lanes, .visual-notes { grid-template-columns: 1fr; }
    .intent-panel { min-height: 260px; }
    .intent-panel h3 { margin-top: 28px; }
    .side-card { position: static; }
    .settings-grid, .security-matrix, .principle-grid, .privacy-grid, .feedback-template { grid-template-columns: 1fr 1fr; }
    .footer-grid { grid-template-columns: 1.4fr .8fr .8fr; gap: 30px; }
}

@media (max-width: 700px) {
    .container { width: min(calc(100% - 28px), var(--container)); }
    .header-shell { width: min(calc(100% - 24px), 1240px); }
    .brand span { font-size: 15px; }
    .search-trigger { padding-inline: 10px; font-size: 13px; }
    .hero h1 { font-size: 42px; }
    .hero__lead { font-size: 16px; }
    .hero__facts li { grid-template-columns: 1fr; gap: 2px; }
    .section { padding: 56px 0; }
    .route-grid, .next-steps__grid, .settings-grid, .security-matrix, .principle-grid, .privacy-grid, .feedback-template, .three-notes, .check-list--columns, .link-cards { grid-template-columns: 1fr; }
    .diagnostic-flow { grid-template-columns: 1fr 1fr; }
    .four-grid { grid-template-columns: 1fr; }
    .page-shell { padding-top: 18px; }
    .page-hero { padding-top: 20px; }
    .page-hero h1 { font-size: 38px; }
    .prose-section--tint { padding: 24px; }
    .decision-row { grid-template-columns: 1fr; }
    .decision-row span + span { border-left: 0; }
    .decision-row:not(.decision-row--head) span + span { border-top: 1px dashed var(--line); }
    .decision-row--head { display: none; }
    .guide-index article { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { align-items: flex-start; flex-direction: column; }
    .search-modal__panel { padding: 28px 20px 22px; }
}

@media (max-width: 480px) {
    .hero { padding: 42px 0 48px; }
    .hero h1 { font-size: 36px; }
    .hero__actions { display: grid; }
    .button { width: 100%; }
    .search-form__row { display: grid; }
    .page-hero h1 { font-size: 34px; }
    .diagnostic-flow { grid-template-columns: 1fr; }
    .step-list li, .step-list--compact li { grid-template-columns: 1fr; gap: 4px; }
    .topic-band, .download-band, .about-strip { padding: 22px; }
}