:root {
    --primary: #B9473F;
    --primary-deep: #91362F;
    --amber: #D89A45;
    --dark: #1E2026;
    --dark-soft: #292C33;
    --bg: #F7F4EF;
    --bg-soft: #EEE9E2;
    --paper: #FFFDF9;
    --text: #2B2D31;
    --muted: #6F706F;
    --accent: #E06A3B;
    --line: #D8D1C8;
    --success-soft: #ECE7DC;
    --shadow: 0 18px 50px rgba(30, 32, 38, .10);
    --radius-lg: 28px;
    --radius-md: 18px;
    --radius-sm: 11px;
    --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    min-width: 320px;
    overflow-x: hidden;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}
body.modal-open { overflow: hidden; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: .18em; }
a:hover { color: var(--primary); }
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { line-height: 1.2; letter-spacing: -.02em; color: var(--dark); }
h1 { font-size: clamp(2.2rem, 5.6vw, 4.9rem); margin-bottom: 24px; }
h2 { font-size: clamp(1.65rem, 3.2vw, 2.65rem); margin-bottom: 18px; }
h3 { font-size: clamp(1.1rem, 2vw, 1.35rem); margin-bottom: 10px; }
p { margin-bottom: 18px; }

.sr-only {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}
.skip-link {
    position: fixed;
    left: 16px;
    top: -80px;
    z-index: 1000;
    padding: 10px 16px;
    background: var(--dark);
    color: #fff;
    border-radius: 8px;
}
.skip-link:focus { top: 12px; color: #fff; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(247, 244, 239, .96);
    border-bottom: 1px solid rgba(30, 32, 38, .09);
    backdrop-filter: blur(14px);
}
.header-inner {
    width: min(var(--max), calc(100% - 40px));
    min-height: 78px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 26px;
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: 11px;
    text-decoration: none;
    flex: 0 0 auto;
}
.brand:hover { color: var(--text); }
.brand img { width: 42px; height: 42px; object-fit: contain; border-radius: 10px; }
.brand-copy { display: grid; line-height: 1.1; }
.brand-copy strong { font-size: 1rem; color: var(--dark); }
.brand-copy small { margin-top: 5px; color: var(--muted); font-size: .74rem; }
.primary-nav {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 4px;
}
.primary-nav a {
    padding: 10px 9px;
    border-radius: 9px;
    text-decoration: none;
    color: #4B4D50;
    font-size: .92rem;
    white-space: nowrap;
}
.primary-nav a:hover,
.primary-nav a[aria-current="page"] { background: var(--bg-soft); color: var(--primary); }
.menu-button { display: none; }
.search-button,
.menu-button {
    border: 1px solid var(--line);
    background: var(--paper);
    color: var(--dark);
    border-radius: 999px;
    padding: 9px 15px;
    white-space: nowrap;
}
.search-button:hover,
.menu-button:hover { border-color: var(--primary); color: var(--primary); }

#mainContent {
    width: min(var(--max), calc(100% - 40px));
    margin: 0 auto;
}
.page-shell { width: 100%; }
.section,
.content-section { padding: clamp(54px, 8vw, 104px) 0; }
.content-section + .content-section { border-top: 1px solid var(--line); }
.eyebrow {
    display: inline-block;
    margin-bottom: 14px;
    color: var(--primary);
    font-size: .78rem;
    font-weight: 800;
    letter-spacing: .12em;
    text-transform: uppercase;
}
.lead,
.hero-lead { font-size: clamp(1.05rem, 1.8vw, 1.25rem); color: #4E5054; max-width: 760px; }
.section-heading { max-width: 760px; margin-bottom: 34px; }
.section-heading.narrow { max-width: 720px; }
.section-heading p { color: var(--muted); }
.text-link { color: var(--primary); font-weight: 700; text-decoration: underline; text-decoration-color: rgba(185, 71, 63, .32); }
.text-link:hover { text-decoration-color: currentColor; }

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 11px 18px;
    border-radius: 999px;
    border: 1px solid transparent;
    text-decoration: none;
    font-weight: 750;
    line-height: 1.25;
}
.button-primary { background: var(--primary); color: #fff; }
.button-primary:hover { background: var(--primary-deep); color: #fff; }
.button-secondary { border-color: var(--line); background: var(--paper); color: var(--dark); }
.button-secondary:hover { border-color: var(--primary); color: var(--primary); }
.hero-actions,
.inline-links,
.mini-links,
.tag-links { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }

.breadcrumbs { padding: 20px 0 4px; font-size: .85rem; color: var(--muted); }
.breadcrumbs ol { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.breadcrumbs li { display: flex; align-items: center; }
.breadcrumbs li:not(:last-child)::after { content: "/"; margin-left: 8px; color: #AAA39A; }
.breadcrumbs a { text-decoration: none; }

.hero,
.page-hero {
    padding: clamp(58px, 8vw, 110px) 0;
}
.hero-home {
    min-height: 610px;
    display: grid;
    grid-template-columns: 1.03fr .97fr;
    align-items: center;
    gap: clamp(36px, 6vw, 84px);
}
.hero-copy { padding: 30px 0; }
.hero-points { margin: 28px 0 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 10px; }
.hero-points li {
    padding: 8px 12px;
    border: 1px solid var(--line);
    background: rgba(255,255,255,.5);
    border-radius: 999px;
    font-size: .86rem;
    color: var(--muted);
}
.hero-media {
    margin: 0;
    position: relative;
}
.hero-media img,
.page-hero > img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    background: var(--bg-soft);
}
.hero-media figcaption { margin: 12px 8px 0; color: var(--muted); font-size: .82rem; }
.two-column,
.split-hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(34px, 6vw, 72px);
    align-items: center;
}
.compact-hero { padding-top: 48px; padding-bottom: 66px; }
.small-media img { aspect-ratio: 5/4; }

.split-intro { display: grid; grid-template-columns: .72fr 1.28fr; gap: 64px; align-items: start; border-top: 1px solid var(--line); }
.sticky-heading { position: sticky; top: 112px; }
.highlight-stack { display: grid; gap: 22px; }
.highlight-card {
    display: grid;
    grid-template-columns: 190px 1fr;
    gap: 24px;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    overflow: hidden;
}
.highlight-card img { width: 100%; height: 100%; min-height: 190px; object-fit: cover; }
.highlight-card > div { padding: 24px 24px 24px 0; align-self: center; }
.highlight-card p { color: var(--muted); }

.feature-band {
    margin: 34px 0;
    padding: clamp(30px, 5vw, 54px);
    display: grid;
    grid-template-columns: .9fr 1.1fr;
    align-items: center;
    gap: clamp(32px, 6vw, 72px);
    color: #F9F2E9;
    background: var(--dark);
    border-radius: var(--radius-lg);
}
.feature-band.reverse { grid-template-columns: 1.1fr .9fr; }
.feature-band.reverse .feature-band__media { order: 2; }
.feature-band h2,
.feature-band h3 { color: #fff; }
.feature-band p { color: #D8D5D0; }
.feature-band .eyebrow { color: #E8B46C; }
.feature-band__media img { width: 100%; aspect-ratio: 5/4; object-fit: cover; border-radius: 18px; }
.feature-band .mini-links a { color: #F2C184; }

.topic-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.topic-card {
    display: grid;
    grid-template-columns: 180px 1fr;
    overflow: hidden;
    border-radius: var(--radius-md);
    background: var(--paper);
    border: 1px solid var(--line);
}
.topic-card img { width: 100%; height: 100%; min-height: 220px; object-fit: cover; }
.topic-card > div { padding: 26px; }
.topic-card p { color: var(--muted); }

.latest-layout { display: grid; grid-template-columns: 1.3fr .7fr; gap: 40px; align-items: start; }
.article-list { display: grid; gap: 18px; }
.article-list.compact { grid-template-columns: repeat(3, minmax(0,1fr)); }
.article-card {
    overflow: hidden;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
}
.article-card__media { display: block; }
.article-card__media img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.article-card__body { padding: 24px; }
.article-card__body p { color: var(--muted); }
.article-card h3 a { text-decoration: none; }
.side-note {
    position: sticky;
    top: 112px;
    padding: 22px;
    border-radius: var(--radius-md);
    border: 1px solid var(--line);
    background: var(--bg-soft);
}
.side-note img { width: 100%; aspect-ratio: 4/3; object-fit: cover; border-radius: 13px; margin-bottom: 22px; }
.side-note p { color: var(--muted); }

.device-strip,
.search-explainer,
.about-band {
    margin: 28px 0;
    padding: clamp(30px, 5vw, 56px);
    display: grid;
    grid-template-columns: 1.1fr .9fr;
    gap: clamp(32px, 5vw, 64px);
    align-items: center;
    border-radius: var(--radius-lg);
    background: var(--bg-soft);
}
.device-strip img,
.search-visual img,
.about-band img { width: 100%; aspect-ratio: 5/4; object-fit: cover; border-radius: 18px; }
.search-explainer { grid-template-columns: .85fr 1.15fr; }
.inline-search-box { margin-top: 24px; padding: 20px; background: var(--paper); border: 1px solid var(--line); border-radius: 14px; }
.inline-search-box label { display: block; font-weight: 700; margin-bottom: 9px; }
.inline-search-box form > div { display: flex; gap: 8px; }
.inline-search-box input,
.search-form input,
.search-page-form input {
    width: 100%;
    min-width: 0;
    min-height: 46px;
    border: 1px solid var(--line);
    background: #fff;
    border-radius: 10px;
    padding: 10px 13px;
    color: var(--text);
    outline: none;
}
.inline-search-box input:focus,
.search-form input:focus,
.search-page-form input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(185,71,63,.12); }
.inline-search-box button,
.search-form button {
    border: 0;
    background: var(--primary);
    color: #fff;
    border-radius: 10px;
    padding: 10px 17px;
    white-space: nowrap;
}

.steps-list { list-style: none; padding: 0; margin: 0 0 26px; display: grid; gap: 0; }
.steps-list li { position: relative; display: grid; grid-template-columns: 58px 1fr; gap: 18px; padding: 0 0 30px; }
.steps-list li:not(:last-child)::after { content: ""; position: absolute; left: 28px; top: 50px; bottom: 3px; width: 1px; background: var(--line); }
.steps-list li > span {
    width: 56px; height: 56px; display: grid; place-items: center;
    border-radius: 50%; background: var(--dark); color: #fff; font-weight: 800;
}
.steps-list p { color: var(--muted); margin-bottom: 0; }
.faq-list { display: grid; gap: 12px; margin-bottom: 24px; }
.faq-list details { background: var(--paper); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.faq-list summary { list-style: none; cursor: pointer; padding: 18px 50px 18px 20px; font-weight: 800; color: var(--dark); position: relative; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 20px; top: 15px; font-size: 1.4rem; color: var(--primary); }
.faq-list details[open] summary::after { content: "–"; }
.faq-list details > div { padding: 0 20px 20px; color: var(--muted); }

.comparison-grid,
.intent-grid,
.verify-grid,
.diagnostic-grid,
.privacy-grid,
.values-grid,
.number-grid,
.safety-matrix,
.numbered-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 20px; }
.comparison-grid article,
.intent-grid article,
.verify-grid article,
.diagnostic-grid article,
.privacy-grid article,
.values-grid article,
.number-grid article,
.safety-matrix article,
.numbered-grid article {
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    padding: 24px;
}
.comparison-grid p,
.intent-grid p,
.verify-grid p,
.diagnostic-grid p,
.privacy-grid p,
.values-grid p,
.number-grid p,
.safety-matrix p,
.numbered-grid p { color: var(--muted); }
.comparison-grid strong { display: block; margin-top: 12px; }
.comparison-grid span { color: var(--muted); }
.numbered-grid article > span,
.number-grid article > span {
    display: inline-flex;
    margin-bottom: 20px;
    font-size: .78rem;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: .08em;
}

.caution-panel,
.note-band,
.tone-band,
.next-route,
.guide-note,
.domain-box {
    margin: 36px 0;
    padding: clamp(26px, 4vw, 44px);
    border-radius: var(--radius-lg);
    background: var(--bg-soft);
    border: 1px solid var(--line);
}
.caution-panel { display: grid; grid-template-columns: 1.1fr .9fr; gap: 42px; }
.checklist,
.notice-card {
    padding: 24px;
    background: var(--paper);
    border-radius: var(--radius-md);
    border: 1px solid var(--line);
}
.checklist ul,
.check-list,
.clean-list,
.principles-list { padding-left: 1.2em; margin-bottom: 0; }
.checklist li,
.check-list li,
.clean-list li,
.principles-list li { margin: 8px 0; }
.clean-list a { text-decoration: none; }
.next-route { display: flex; gap: 20px; align-items: center; flex-wrap: wrap; }
.next-route h2 { width: 100%; margin-bottom: 0; }
.next-route p { flex: 1 1 520px; margin-bottom: 0; color: var(--muted); }

.entrance-hero,
.app-page .page-hero,
.ai-hero,
.topics-hero,
.guide-hero,
.faq-hero,
.about-hero,
.safety-hero,
.privacy-hero {
    padding-top: clamp(56px, 8vw, 96px);
    padding-bottom: clamp(54px, 7vw, 86px);
}
.domain-box { background: var(--dark); color: #E8E4DD; border-color: transparent; }
.domain-box h2, .domain-box h3 { color: #fff; }
.domain-box code { color: #FFD3A0; font-size: 1.1rem; }
.bookmark-layout,
.intent-columns,
.two-column.text-columns { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(30px, 5vw, 62px); align-items: start; }
.diagnostic-cards { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 18px; }
.diagnostic-cards > * { padding: 22px; background: var(--paper); border: 1px solid var(--line); border-radius: 14px; }
.topic-detail { padding: 34px 0; border-top: 1px solid var(--line); }
.topic-detail__head { display: grid; grid-template-columns: 180px 1fr; gap: 28px; align-items: center; margin-bottom: 24px; }
.topic-detail__head img { width: 100%; aspect-ratio: 4/3; object-fit: cover; border-radius: 14px; }
.topic-detail--alt .topic-detail__head { grid-template-columns: 1fr 180px; }
.topic-detail--alt .topic-detail__head img { order: 2; }
.guide-steps { display: grid; gap: 18px; }
.guide-steps article { padding: 28px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--paper); }
.guide-steps article > span { color: var(--primary); font-weight: 800; }
.editorial-principles { display: grid; grid-template-columns: .85fr 1.15fr; gap: 44px; }

.article-shell { max-width: 980px; margin-left: auto; margin-right: auto; }
.article-detail { padding: 44px 0 70px; }
.article-header { max-width: 820px; margin: 0 auto; }
.article-header h1 { font-size: clamp(2.15rem,5vw,4.3rem); }
.article-keywords { display: flex; flex-wrap: wrap; gap: 8px; margin: 24px 0 30px; }
.article-keywords span { padding: 7px 11px; background: var(--bg-soft); border-radius: 999px; font-size: .82rem; color: var(--muted); }
.article-cover { margin: 38px 0 52px; }
.article-cover img { width: 100%; aspect-ratio: 16/8.8; object-fit: cover; border-radius: var(--radius-lg); }
.article-body { max-width: 760px; margin: 0 auto; }
.article-body section { margin-bottom: 50px; }
.article-body h2 { font-size: clamp(1.5rem,3vw,2.15rem); margin-bottom: 18px; }
.article-body p { font-size: 1.04rem; color: #44464A; }
.article-next-step { max-width: 760px; margin: 42px auto 0; padding: 30px; background: var(--dark); border-radius: var(--radius-md); color: #D9D5CF; }
.article-next-step h2 { color: #fff; }
.article-next-step .text-link { color: #F0BD78; }
.related-section { padding: 60px 0 90px; border-top: 1px solid var(--line); }

.search-page-form { display: flex; gap: 10px; max-width: 780px; margin-top: 26px; }
.search-page-form input { flex: 1 1 auto; }
.tag-links a { padding: 8px 13px; border: 1px solid var(--line); border-radius: 999px; text-decoration: none; background: var(--paper); }
.empty-state { display: grid; grid-template-columns: 280px 1fr; gap: 40px; align-items: center; }
.empty-state img { width: 100%; aspect-ratio: 4/3; object-fit: cover; border-radius: var(--radius-md); }
.search-results { max-width: 880px; }

.not-found-panel {
    min-height: 58vh;
    padding: clamp(70px,10vw,130px) 0;
    max-width: 780px;
}
.not-found-panel p { color: var(--muted); font-size: 1.1rem; }
.not-found-links { display: flex; flex-wrap: wrap; gap: 12px 20px; margin-top: 28px; }

.site-footer { margin-top: 70px; background: var(--dark); color: #D2CFC9; }
.footer-grid {
    width: min(var(--max), calc(100% - 40px));
    margin: 0 auto;
    padding: 64px 0 44px;
    display: grid;
    grid-template-columns: 1.6fr repeat(3, .8fr);
    gap: 42px;
}
.footer-grid h2 { color: #fff; font-size: 1rem; margin-bottom: 15px; }
.footer-grid > div:not(.footer-intro) { display: flex; flex-direction: column; gap: 8px; }
.footer-grid a { color: #D2CFC9; text-decoration: none; }
.footer-grid a:hover { color: #F2B975; }
.footer-brand { display: inline-block; margin-bottom: 12px; font-size: 1.28rem; font-weight: 800; color: #fff !important; }
.footer-intro p { max-width: 500px; color: #AAA8A4; }
.footer-bottom {
    width: min(var(--max), calc(100% - 40px));
    margin: 0 auto;
    padding: 22px 0 30px;
    border-top: 1px solid rgba(255,255,255,.1);
    display: flex;
    justify-content: space-between;
    gap: 20px;
    color: #8F8D89;
    font-size: .85rem;
}

.search-modal[hidden] { display: none !important; }
.search-modal { position: fixed; inset: 0; z-index: 300; display: grid; place-items: start center; padding: 11vh 20px 30px; }
.search-backdrop { position: absolute; inset: 0; background: rgba(30,32,38,.74); }
.search-dialog {
    position: relative;
    z-index: 1;
    width: min(680px, 100%);
    padding: 34px;
    background: var(--bg);
    border-radius: var(--radius-lg);
    box-shadow: 0 30px 100px rgba(0,0,0,.28);
}
.search-dialog h2 { padding-right: 70px; }
.search-close { position: absolute; right: 20px; top: 20px; border: 1px solid var(--line); background: var(--paper); border-radius: 999px; padding: 7px 12px; }
.search-form label { display: block; font-weight: 750; margin: 12px 0 8px; }
.search-form-row { display: flex; gap: 8px; }
.search-note { margin: 14px 0 0; color: var(--muted); font-size: .88rem; }
.back-to-top {
    position: fixed;
    right: 24px;
    bottom: 24px;
    z-index: 90;
    border: 1px solid var(--line);
    background: var(--paper);
    color: var(--dark);
    border-radius: 999px;
    padding: 10px 14px;
    box-shadow: 0 8px 24px rgba(30,32,38,.12);
}
.back-to-top[hidden] { display: none; }

@media (max-width: 1100px) {
    .header-inner { gap: 14px; }
    .brand-copy small { display: none; }
    .primary-nav a { padding-left: 7px; padding-right: 7px; font-size: .86rem; }
    .hero-home { grid-template-columns: 1fr 1fr; }
    .topic-grid { grid-template-columns: 1fr; }
    .article-list.compact { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .comparison-grid,
    .intent-grid,
    .verify-grid,
    .diagnostic-grid,
    .privacy-grid,
    .values-grid,
    .number-grid,
    .safety-matrix,
    .numbered-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
}

@media (max-width: 900px) {
    .menu-button { display: inline-flex; margin-left: auto; }
    .primary-nav {
        position: absolute;
        left: 20px;
        right: 20px;
        top: calc(100% + 8px);
        display: none;
        flex-direction: column;
        align-items: stretch;
        padding: 12px;
        background: var(--paper);
        border: 1px solid var(--line);
        border-radius: 16px;
        box-shadow: var(--shadow);
    }
    .primary-nav.is-open { display: flex; }
    .primary-nav a { padding: 11px 12px; }
    .search-button { padding: 9px 12px; }
    .hero-home,
    .two-column,
    .split-hero,
    .split-intro,
    .latest-layout,
    .feature-band,
    .feature-band.reverse,
    .device-strip,
    .search-explainer,
    .about-band,
    .bookmark-layout,
    .intent-columns,
    .two-column.text-columns,
    .caution-panel,
    .editorial-principles { grid-template-columns: 1fr; }
    .feature-band.reverse .feature-band__media { order: 0; }
    .sticky-heading,
    .side-note { position: static; }
    .hero-media { max-width: 720px; }
    .highlight-card { grid-template-columns: 160px 1fr; }
    .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
    .footer-intro { grid-column: 1 / -1; }
    .topic-detail--alt .topic-detail__head { grid-template-columns: 180px 1fr; }
    .topic-detail--alt .topic-detail__head img { order: 0; }
}

@media (max-width: 700px) {
    body { font-size: 15.5px; }
    #mainContent,
    .header-inner,
    .footer-grid,
    .footer-bottom { width: min(100% - 28px, var(--max)); }
    .header-inner { min-height: 68px; }
    .brand img { width: 36px; height: 36px; }
    .brand-copy strong { font-size: .93rem; }
    .search-button { font-size: 0; width: 40px; height: 40px; padding: 0; }
    .search-button::before { content: "查"; font-size: .88rem; }
    .hero,
    .page-hero { padding-top: 50px; padding-bottom: 58px; }
    h1 { font-size: clamp(2rem, 11vw, 3.2rem); }
    h2 { font-size: clamp(1.5rem, 7.2vw, 2.2rem); }
    .hero-home { min-height: auto; }
    .hero-actions { align-items: stretch; }
    .hero-actions .button { width: 100%; }
    .highlight-card,
    .topic-card,
    .topic-detail__head,
    .topic-detail--alt .topic-detail__head,
    .empty-state { grid-template-columns: 1fr; }
    .highlight-card img { height: 210px; }
    .highlight-card > div { padding: 22px; }
    .topic-card img { height: 230px; min-height: 0; }
    .comparison-grid,
    .intent-grid,
    .verify-grid,
    .diagnostic-grid,
    .privacy-grid,
    .values-grid,
    .number-grid,
    .safety-matrix,
    .numbered-grid,
    .diagnostic-cards,
    .article-list.compact { grid-template-columns: 1fr; }
    .feature-band,
    .device-strip,
    .search-explainer,
    .about-band { padding: 24px; border-radius: 20px; }
    .section,
    .content-section { padding: 50px 0; }
    .article-cover { margin-top: 26px; }
    .article-body p { font-size: 1rem; }
    .article-next-step { padding: 24px; }
    .search-page-form,
    .search-form-row,
    .inline-search-box form > div { flex-direction: column; }
    .search-page-form .button { width: 100%; }
    .search-dialog { padding: 28px 20px 22px; }
    .search-dialog h2 { padding-right: 0; padding-top: 30px; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px 22px; }
    .footer-intro { grid-column: 1 / -1; }
    .footer-bottom { flex-direction: column; }
    .back-to-top { right: 14px; bottom: 14px; }
}

@media (max-width: 430px) {
    #mainContent,
    .header-inner,
    .footer-grid,
    .footer-bottom { width: calc(100% - 22px); }
    .header-inner { gap: 8px; }
    .brand-copy strong { max-width: 105px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
    .menu-button { padding: 8px 11px; }
    .primary-nav { left: 11px; right: 11px; }
    .hero-points { align-items: stretch; }
    .hero-points li { width: 100%; border-radius: 10px; }
    .breadcrumbs { font-size: .79rem; }
    .feature-band,
    .device-strip,
    .search-explainer,
    .about-band,
    .caution-panel,
    .note-band,
    .tone-band,
    .next-route,
    .guide-note,
    .domain-box { border-radius: 16px; }
    .article-card__body { padding: 20px; }
    .footer-grid { grid-template-columns: 1fr; }
}