/* 91浏览器官网 - 轻量内容型布局 */
:root{
    --primary:#6F5AE8;
    --primary-soft:#9A8CF2;
    --ink:#242433;
    --text:#30303A;
    --muted:#70707D;
    --bg:#F8F8FC;
    --soft:#F0EEFA;
    --accent:#F29A4A;
    --line:#E2E0EC;
    --white:#FFFFFF;
    --shadow:0 18px 50px rgba(36,36,51,.08);
    --radius:24px;
    --radius-sm:14px;
    --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei","PingFang SC",Arial,sans-serif;font-size:16px;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(--primary)}
button,input{font:inherit}
button{cursor:pointer}
code{padding:.12rem .4rem;border-radius:6px;background:var(--soft);font-size:.92em}
.container{width:min(calc(100% - 40px),var(--max));margin:0 auto}
.narrow{width:min(calc(100% - 40px),820px);margin:0 auto}
.narrow-wide{width:min(calc(100% - 40px),980px);margin:0 auto}
.skip-link{position:fixed;left:16px;top:10px;z-index:1000;transform:translateY(-140%);padding:10px 14px;border-radius:8px;background:var(--ink);color:#fff}
.skip-link:focus{transform:translateY(0)}
.site-header{position:sticky;top:0;z-index:50;border-bottom:1px solid rgba(226,224,236,.9);background:rgba(248,248,252,.96);backdrop-filter:blur(14px)}
.header-inner{min-height:74px;display:flex;align-items:center;gap:24px}
.brand{display:flex;align-items:center;gap:10px;min-width:230px}
.brand img{width:40px;height:40px;object-fit:contain}
.brand span{display:flex;flex-direction:column;line-height:1.25}
.brand strong{font-size:17px;color:var(--ink)}
.brand small{margin-top:4px;color:var(--muted);font-size:12px}
.primary-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.primary-nav a{padding:10px 11px;border-radius:10px;color:#525260;font-size:15px}
.primary-nav a:hover,.primary-nav a[aria-current="page"]{background:var(--soft);color:var(--primary)}
.search-trigger,.menu-toggle{border:1px solid var(--line);background:var(--white);color:var(--ink);border-radius:12px;padding:9px 13px}
.search-trigger:hover,.menu-toggle:hover{border-color:var(--primary-soft);color:var(--primary)}
.menu-toggle{display:none}
.search-modal[hidden]{display:none!important}
.search-modal{position:fixed;inset:0;z-index:200;display:grid;place-items:start center;padding:11vh 20px 20px;background:rgba(36,36,51,.68)}
.search-dialog{position:relative;width:min(680px,100%);padding:34px;border-radius:24px;background:#fff;box-shadow:0 28px 90px rgba(0,0,0,.22)}
.search-dialog h2{margin:0 0 8px;font-size:28px;color:var(--ink)}
.search-dialog p{margin:0 0 20px;color:var(--muted)}
.search-close{position:absolute;right:18px;top:18px;border:0;background:transparent;color:var(--muted)}
.search-form label{display:block;margin-bottom:8px;font-weight:700;color:var(--ink)}
.search-row{display:flex;gap:10px}
.search-row input{min-width:0;flex:1;border:1px solid var(--line);border-radius:12px;padding:12px 14px;background:#fff;color:var(--ink);outline:none}
.search-row input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(111,90,232,.12)}
.search-row button{border:0;border-radius:12px;padding:12px 18px;background:var(--primary);color:#fff;font-weight:700}
.hero{padding:68px 0 42px}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(360px,.92fr);gap:58px;align-items:center}
.hero-copy h1,.page-hero h1{margin:10px 0 18px;color:var(--ink);font-size:clamp(38px,5vw,66px);line-height:1.08;letter-spacing:-.035em}
.page-hero h1{font-size:clamp(34px,4.3vw,54px)}
.hero-lead,.page-hero p{max-width:760px;margin:0;color:#555564;font-size:19px;line-height:1.85}
.eyebrow{margin:0 0 8px!important;color:var(--primary)!important;font-size:13px!important;font-weight:800;line-height:1.4!important;letter-spacing:.08em;text-transform:uppercase}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0 24px}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:11px 18px;border-radius:13px;font-weight:800;transition:.2s ease}
.button.primary{background:var(--primary);color:#fff;box-shadow:0 10px 25px rgba(111,90,232,.2)}
.button.primary:hover{transform:translateY(-1px);background:#5e4bd2;color:#fff}
.button.secondary{border:1px solid var(--line);background:#fff;color:var(--ink)}
.button.secondary:hover{border-color:var(--primary-soft);color:var(--primary)}
.button.full{width:100%}
.hero-notes{display:grid;gap:8px;margin:0;padding:0;list-style:none;color:var(--muted);font-size:14px}
.hero-notes li{position:relative;padding-left:22px}
.hero-notes li:before{content:"";position:absolute;left:0;top:.72em;width:7px;height:7px;border-radius:50%;background:var(--accent)}
.hero-media{margin:0;padding:14px;border:1px solid var(--line);border-radius:30px;background:#fff;box-shadow:var(--shadow)}
.hero-media img{width:100%;aspect-ratio:760/560;object-fit:cover;border-radius:20px;background:var(--soft)}
.hero-media figcaption{padding:14px 8px 4px;color:var(--muted);font-size:13px}
.section{padding:72px 0}
.compact-section{padding-top:48px}
.soft-band{border-block:1px solid #e9e7f2;background:var(--soft)}
.section-heading{max-width:760px;margin-bottom:30px}
.section-heading.left{margin-left:0}
.section-heading h2{margin:4px 0 10px;color:var(--ink);font-size:clamp(29px,3.5vw,43px);line-height:1.2;letter-spacing:-.025em}
.section-heading>p:not(.eyebrow){margin:0;color:var(--muted)}
.split-heading{display:flex;max-width:none;align-items:end;justify-content:space-between;gap:40px}
.split-heading>p{max-width:480px}
.topic-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.topic-card{position:relative;min-height:310px;padding:28px;border:1px solid var(--line);border-radius:22px;background:#fff;overflow:hidden}
.topic-card:after{content:"";position:absolute;right:-45px;bottom:-45px;width:130px;height:130px;border-radius:50%;background:var(--soft)}
.topic-number{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:12px;background:var(--soft);color:var(--primary);font-weight:800}
.topic-card h3{margin:54px 0 12px;color:var(--ink);font-size:24px;line-height:1.3}
.topic-card p{margin:0 0 20px;color:var(--muted)}
.text-link{display:inline-flex;align-items:center;gap:8px;color:var(--primary);font-weight:800}
.text-link:after{content:"→"}
.feature-split{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.feature-split.reverse .feature-image{order:2}
.feature-image img{width:100%;border-radius:26px;aspect-ratio:700/520;object-fit:cover;box-shadow:var(--shadow);background:#fff}
.feature-copy h2{margin:8px 0 18px;color:var(--ink);font-size:clamp(30px,3.6vw,46px);line-height:1.18}
.feature-copy p{margin:0 0 16px;color:#585866}
.feature-copy .button{margin-top:8px}
.step-list{display:grid;gap:0;margin:0;padding:0;list-style:none;border-top:1px solid var(--line)}
.step-list li{display:grid;grid-template-columns:90px 1fr;gap:26px;padding:30px 0;border-bottom:1px solid var(--line)}
.step-list span{font-size:30px;font-weight:900;color:var(--primary-soft)}
.step-list h3{margin:0 0 8px;color:var(--ink);font-size:24px}
.step-list p{max-width:820px;margin:0;color:var(--muted)}
.editorial-band{background:var(--ink);color:#fff}
.editorial-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:60px;align-items:center}
.editorial-grid h2{margin:7px 0 18px;font-size:clamp(30px,3.4vw,44px);line-height:1.2}
.editorial-grid p:not(.eyebrow){color:#ceceda}
.editorial-grid .text-link{color:#c9c0ff}
.editorial-grid figure{margin:0}
.editorial-grid img{width:100%;border-radius:24px;aspect-ratio:620/420;object-fit:cover;background:#343445}
.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.guide-card{display:flex;flex-direction:column;min-height:280px;padding:24px;border:1px solid var(--line);border-radius:20px;background:#fff}
.guide-card h3{margin:5px 0 12px;font-size:21px;line-height:1.4;color:var(--ink)}
.guide-card h3 a:hover{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:4px}
.guide-card>p:not(.eyebrow){margin:0 0 22px;color:var(--muted)}
.guide-card .text-link{margin-top:auto}
.visual-strip{padding-top:50px}
.visual-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:16px}
.visual-grid figure{margin:0;padding:10px;border:1px solid var(--line);border-radius:20px;background:#fff}
.visual-grid img{width:100%;aspect-ratio:1.3/1;object-fit:cover;border-radius:13px;background:var(--soft)}
.visual-grid figcaption{padding:12px 6px 5px;color:var(--muted);font-size:14px}
.faq-layout{display:grid;grid-template-columns:.75fr 1.25fr;gap:60px;align-items:start}
.faq-intro{position:sticky;top:110px}
.faq-intro h2{margin:6px 0 14px;color:var(--ink);font-size:38px;line-height:1.2}
.faq-intro>p:not(.eyebrow){color:var(--muted)}
.faq-list{display:grid;gap:10px}
.faq-list details{border:1px solid var(--line);border-radius:16px;background:#fff;overflow:hidden}
.faq-list summary{position:relative;padding:18px 52px 18px 20px;color:var(--ink);font-weight:800;cursor:pointer;list-style:none}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary:after{content:"+";position:absolute;right:20px;top:15px;color:var(--primary);font-size:24px;font-weight:400}
.faq-list details[open] summary:after{content:"−"}
.faq-list details p{margin:0;padding:0 20px 20px;color:var(--muted)}
.about-band{padding:82px 0;background:#fff}
.about-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:60px;align-items:center}
.about-grid img{width:100%;border-radius:26px;aspect-ratio:680/460;object-fit:cover;background:var(--soft)}
.about-grid h2{margin:6px 0 16px;color:var(--ink);font-size:40px;line-height:1.2}
.about-grid p:not(.eyebrow){color:var(--muted)}
.inline-links{display:flex;flex-wrap:wrap;gap:18px;margin-top:22px}
.inline-links a{color:var(--primary);font-weight:800;text-decoration:underline;text-underline-offset:4px}
.final-cta{padding:58px 0 90px}
.final-cta-inner{display:grid;grid-template-columns:1.1fr .9fr;gap:44px;padding:38px;border-radius:28px;background:var(--soft)}
.final-cta h2{margin:5px 0 10px;color:var(--ink);font-size:36px;line-height:1.2}
.final-cta p:not(.eyebrow){margin:0;color:var(--muted)}
.cta-list{display:grid;gap:10px;align-content:center}
.cta-list a{padding:14px 18px;border:1px solid rgba(111,90,232,.18);border-radius:13px;background:#fff;color:var(--ink);font-weight:800}
.cta-list a:hover{border-color:var(--primary-soft);color:var(--primary)}
.breadcrumbs{display:flex;flex-wrap:wrap;align-items:center;gap:9px;padding:18px 0 0;color:var(--muted);font-size:13px}
.breadcrumbs a{color:#5e5e6a}
.breadcrumbs a:hover{color:var(--primary)}
.page-hero{padding:48px 0 58px}
.page-hero.simple{padding-bottom:36px}
.page-hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
.page-hero-grid img{width:100%;border-radius:25px;aspect-ratio:620/440;object-fit:cover;background:var(--soft);box-shadow:var(--shadow)}
.prose-grid{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:52px;align-items:start}
.prose-main h2,.prose-single h2{margin:42px 0 12px;color:var(--ink);font-size:30px;line-height:1.3}
.prose-main h2:first-child,.prose-single h2:first-child{margin-top:0}
.prose-main p,.prose-single p{margin:0 0 18px;color:#51515e;font-size:17px;line-height:1.9}
.prose-aside{position:sticky;top:108px;padding:24px;border:1px solid var(--line);border-radius:20px;background:#fff}
.prose-aside h2{margin:0 0 14px;color:var(--ink);font-size:22px}
.info-callout{margin:28px 0;padding:20px 22px;border-left:4px solid var(--accent);border-radius:0 14px 14px 0;background:#fff8ef}
.info-callout strong{color:var(--ink)}
.info-callout p{margin:5px 0 0!important;font-size:15px!important}
.info-callout a{color:var(--primary);font-weight:800}
.check-list{display:grid;gap:11px;margin:0 0 22px;padding:0;list-style:none;color:var(--muted)}
.check-list li{position:relative;padding-left:22px}
.check-list li:before{content:"✓";position:absolute;left:0;color:var(--primary);font-weight:900}
.download-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:start}
.checklist-numbered{display:grid;gap:12px;margin:0;padding:0;list-style:none}
.checklist-numbered li{display:grid;grid-template-columns:46px 1fr;gap:16px;align-items:start;padding:18px;border:1px solid var(--line);border-radius:15px;background:#fff}
.checklist-numbered span{display:flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:11px;background:var(--soft);color:var(--primary);font-weight:900}
.checklist-numbered p{margin:3px 0 0;color:#575765}
.download-note{padding:18px;border-radius:22px;background:var(--ink);color:#fff}
.download-note img{width:100%;border-radius:15px;aspect-ratio:520/360;object-fit:cover;background:#373749}
.download-note h2{margin:20px 8px 8px;font-size:27px;line-height:1.3}
.download-note p{margin:0 8px 8px;color:#d0d0dc}
.three-columns{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.three-columns article{padding:25px;border-radius:20px;background:#fff}
.three-columns h2{margin:7px 0 12px;color:var(--ink);font-size:24px;line-height:1.35}
.three-columns p:not(.eyebrow){margin:0;color:var(--muted)}
.guide-index{display:grid;grid-template-columns:240px 1fr;gap:46px;align-items:start}
.filter-panel{position:sticky;top:108px;display:grid;gap:6px;padding:20px;border:1px solid var(--line);border-radius:18px;background:#fff}
.filter-panel h2{margin:0 0 8px;color:var(--ink);font-size:20px}
.filter-panel a{padding:10px 11px;border-radius:10px;color:#5e5e6a}
.filter-panel a:hover{background:var(--soft);color:var(--primary)}
.guide-list-long{display:grid;border-top:1px solid var(--line)}
.guide-list-long article{display:grid;grid-template-columns:1fr auto;gap:26px;align-items:end;padding:27px 0;border-bottom:1px solid var(--line)}
.guide-list-long h2{margin:4px 0 8px;color:var(--ink);font-size:25px;line-height:1.35}
.guide-list-long h2 a:hover{color:var(--primary)}
.guide-list-long p:not(.eyebrow){max-width:760px;margin:0;color:var(--muted)}
.topic-stack{display:grid;gap:22px}
.topic-panel{padding:30px;border:1px solid var(--line);border-radius:24px;background:#fff}
.topic-panel-head{display:grid;grid-template-columns:62px 1fr;gap:22px;align-items:start}
.topic-panel-head>span{font-size:32px;font-weight:900;color:var(--primary-soft)}
.topic-panel h2{margin:0 0 8px;color:var(--ink);font-size:30px}
.topic-panel p{margin:0;color:var(--muted)}
.topic-link-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:26px}
.topic-link-list a{padding:18px;border-radius:14px;background:var(--soft)}
.topic-link-list strong{display:block;margin-bottom:5px;color:var(--ink)}
.topic-link-list span{display:block;color:var(--muted);font-size:14px}
.article-header{padding:48px 0 34px}
.article-header h1{margin:8px 0 18px;color:var(--ink);font-size:clamp(36px,5vw,58px);line-height:1.13;letter-spacing:-.03em}
.article-lead{margin:0;color:#575765;font-size:20px;line-height:1.85}
.article-meta{display:flex;flex-wrap:wrap;gap:18px;margin-top:22px;color:var(--muted);font-size:14px}
.article-meta a{color:var(--primary);font-weight:700}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:56px;align-items:start;padding-bottom:82px}
.article-body{padding-top:12px}
.article-body section{padding:32px 0;border-top:1px solid var(--line)}
.article-body h2{margin:0 0 14px;color:var(--ink);font-size:30px;line-height:1.35}
.article-body p{margin:0 0 17px;color:#4e4e5a;font-size:17px;line-height:1.95}
.article-sidebar{position:sticky;top:108px;padding:16px;border:1px solid var(--line);border-radius:20px;background:#fff}
.article-sidebar img{width:100%;border-radius:14px;aspect-ratio:520/360;object-fit:cover;background:var(--soft)}
.article-sidebar h2{margin:18px 6px 12px;color:var(--ink);font-size:21px}
.article-sidebar .check-list{padding:0 6px}
.article-next{margin-top:22px;padding:26px;border-radius:20px;background:var(--soft)}
.article-next h2{margin-top:0}
.faq-page-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:48px;align-items:start}
.faq-list.large summary{padding-top:21px;padding-bottom:21px;font-size:17px}
.faq-side{position:sticky;top:108px;padding:16px;border:1px solid var(--line);border-radius:20px;background:#fff}
.faq-side img{width:100%;border-radius:14px;aspect-ratio:520/360;object-fit:cover;background:var(--soft)}
.faq-side h2{margin:18px 6px 8px;color:var(--ink);font-size:23px}
.faq-side p{margin:0 6px 18px;color:var(--muted)}
.page-search{margin-top:26px}
.search-summary{margin-bottom:20px}
.search-summary h2{margin:0 0 5px;color:var(--ink)}
.search-summary p{margin:0;color:var(--muted)}
.search-results{display:grid;gap:12px}
.search-results article{padding:24px;border:1px solid var(--line);border-radius:18px;background:#fff}
.search-results h2{margin:4px 0 9px;color:var(--ink);font-size:24px;line-height:1.4}
.search-results p:not(.eyebrow){margin:0 0 12px;color:var(--muted)}
.empty-state{padding:38px;border:1px dashed var(--primary-soft);border-radius:20px;background:#fff;text-align:center}
.empty-state h2{margin:0 0 10px;color:var(--ink)}
.empty-state p{margin:0;color:var(--muted)}
.empty-state a{color:var(--primary);font-weight:700}
.prose-single{max-width:860px}
.safety-grid,.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.safety-grid article,.contact-grid article{padding:28px;border:1px solid var(--line);border-radius:20px;background:#fff}
.safety-grid article>span{display:block;margin-bottom:30px;color:var(--primary-soft);font-size:32px;font-weight:900}
.safety-grid h2,.contact-grid h2{margin:0 0 10px;color:var(--ink);font-size:26px;line-height:1.3}
.safety-grid p,.contact-grid p{margin:0;color:var(--muted)}
.not-found{min-height:70vh;display:grid;align-items:center;padding:80px 0}
.not-found h1{margin:8px 0 18px;color:var(--ink);font-size:clamp(40px,6vw,68px);line-height:1.08}
.not-found p:not(.eyebrow){color:var(--muted);font-size:18px}
.not-found-links{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0}
.not-found-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:34px}
.not-found-grid a{padding:18px;border:1px solid var(--line);border-radius:15px;background:#fff}
.not-found-grid strong,.not-found-grid span{display:block}
.not-found-grid strong{margin-bottom:5px;color:var(--ink)}
.not-found-grid span{color:var(--muted);font-size:13px}
.site-footer{border-top:1px solid var(--line);background:#fff}
.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:34px;padding:54px 0}
.footer-intro strong{color:var(--ink);font-size:20px}
.footer-intro p{max-width:380px;margin:10px 0 0;color:var(--muted);font-size:14px}
.footer-grid nav{display:flex;flex-direction:column;gap:8px}
.footer-grid nav h2{margin:0 0 7px;color:var(--ink);font-size:15px}
.footer-grid nav a{color:var(--muted);font-size:14px}
.footer-grid nav a:hover{color:var(--primary)}
.footer-bottom{padding:18px 0 28px;border-top:1px solid var(--line);color:var(--muted);font-size:13px}
.footer-bottom p{margin:0}
.back-top{position:fixed;right:20px;bottom:20px;z-index:40;display:none;border:1px solid var(--line);border-radius:999px;padding:10px 14px;background:#fff;color:var(--ink);box-shadow:var(--shadow)}
.back-top.visible{display:block}
@media (max-width:1100px){
    .primary-nav a{padding-inline:8px;font-size:14px}
    .brand{min-width:190px}
    .brand small{display:none}
    .hero-grid,.page-hero-grid{grid-template-columns:1fr 420px;gap:38px}
    .guide-grid{grid-template-columns:repeat(2,1fr)}
    .visual-grid{grid-template-columns:1fr 1fr}
    .visual-grid figure:first-child{grid-column:1/-1}
}
@media (max-width:920px){
    .header-inner{min-height:68px;gap:12px}
    .menu-toggle{display:inline-flex;margin-left:auto}
    .primary-nav{position:absolute;left:20px;right:20px;top:74px;display:none;flex-direction:column;align-items:stretch;padding:10px;border:1px solid var(--line);border-radius:15px;background:#fff;box-shadow:var(--shadow)}
    .primary-nav.open{display:flex}
    .primary-nav a{padding:11px 13px}
    .hero-grid,.page-hero-grid,.feature-split,.editorial-grid,.about-grid,.download-layout,.final-cta-inner{grid-template-columns:1fr}
    .hero-media{max-width:680px}
    .feature-split.reverse .feature-image{order:0}
    .topic-cards,.three-columns{grid-template-columns:1fr}
    .topic-card{min-height:0}
    .topic-card h3{margin-top:34px}
    .prose-grid,.article-layout,.faq-page-layout{grid-template-columns:1fr}
    .prose-aside,.article-sidebar,.faq-side,.faq-intro,.filter-panel{position:static}
    .faq-layout{grid-template-columns:1fr}
    .guide-index{grid-template-columns:1fr}
    .filter-panel{grid-template-columns:repeat(2,1fr)}
    .filter-panel h2{grid-column:1/-1}
    .footer-grid{grid-template-columns:1.4fr 1fr 1fr}
    .footer-intro{grid-column:1/-1}
}
@media (max-width:720px){
    .container,.narrow,.narrow-wide{width:min(calc(100% - 28px),var(--max))}
    .search-trigger{padding:8px 10px;font-size:13px}
    .brand{min-width:0}
    .brand strong{font-size:15px}
    .hero{padding-top:42px}
    .hero-copy h1,.page-hero h1{font-size:40px}
    .hero-lead,.page-hero p{font-size:17px}
    .section{padding:54px 0}
    .split-heading{align-items:start;flex-direction:column;gap:12px}
    .guide-grid{grid-template-columns:1fr}
    .visual-grid{grid-template-columns:1fr}
    .visual-grid figure:first-child{grid-column:auto}
    .step-list li{grid-template-columns:54px 1fr;gap:12px}
    .step-list span{font-size:24px}
    .topic-link-list,.safety-grid,.contact-grid{grid-template-columns:1fr}
    .guide-list-long article{grid-template-columns:1fr;align-items:start}
    .article-header{padding-top:34px}
    .article-header h1{font-size:40px}
    .article-lead{font-size:18px}
    .not-found-grid{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:1fr 1fr}
    .footer-intro{grid-column:1/-1}
}
@media (max-width:520px){
    body{font-size:15px}
    .container,.narrow,.narrow-wide{width:min(calc(100% - 22px),var(--max))}
    .header-inner{min-height:62px}
    .brand img{width:34px;height:34px}
    .brand span{display:none}
    .menu-toggle,.search-trigger{padding:7px 9px;font-size:12px}
    .primary-nav{left:11px;right:11px;top:66px}
    .hero-copy h1,.page-hero h1,.article-header h1{font-size:34px}
    .hero-actions{display:grid}
    .button{width:100%}
    .hero-media{padding:9px;border-radius:20px}
    .hero-media img{border-radius:14px}
    .section-heading h2,.feature-copy h2{font-size:30px}
    .topic-card,.guide-card,.topic-panel{padding:20px}
    .step-list li{grid-template-columns:1fr}
    .editorial-grid{gap:30px}
    .filter-panel{grid-template-columns:1fr}
    .filter-panel h2{grid-column:auto}
    .topic-panel-head{grid-template-columns:1fr}
    .topic-panel-head>span{font-size:24px}
    .search-row{display:grid}
    .search-row button{width:100%}
    .search-dialog{padding:28px 18px 20px}
    .footer-grid{grid-template-columns:1fr}
    .footer-intro{grid-column:auto}
    .back-top{right:12px;bottom:12px}
}