:root{
    --primary:#6F5AE8;
    --primary-soft:#9A8CF2;
    --ink:#242433;
    --text:#30303A;
    --muted:#70707D;
    --bg:#F8F8FC;
    --surface:#FFFFFF;
    --lavender:#F0EEFA;
    --accent:#F29A4A;
    --border:#E4E1F0;
    --shadow:0 18px 45px rgba(36,36,51,.08);
    --radius-lg:28px;
    --radius-md:18px;
    --radius-sm:12px;
    --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","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
}
body.modal-open{overflow:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:4px}
button,input{font:inherit}
button{cursor:pointer}
code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:var(--lavender);padding:.12em .4em;border-radius:6px}
.container{width:min(calc(100% - 40px),var(--max));margin-inline:auto}
.narrow{width:min(calc(100% - 40px),820px);margin-inline:auto}
.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;left:18px;top:-80px;z-index:1000;background:var(--ink);color:#fff;padding:10px 16px;border-radius:8px}
.skip-link:focus{top:18px}

.site-header{position:sticky;top:0;z-index:80;background:rgba(248,248,252,.94);border-bottom:1px solid rgba(228,225,240,.85);backdrop-filter:blur(16px)}
.header-inner{min-height:76px;display:flex;align-items:center;gap:24px}
.brand{display:flex;align-items:center;gap:11px;color:var(--ink);min-width:220px;text-decoration:none}
.brand:hover{text-decoration:none}
.brand img{width:46px;height:46px;object-fit:contain;border-radius:12px}
.brand span{display:flex;flex-direction:column;line-height:1.25}
.brand b{font-size:16px}
.brand small{color:var(--muted);font-size:11px;margin-top:4px;letter-spacing:.02em}
.primary-nav{margin-left:auto;display:flex;align-items:center;gap:6px}
.primary-nav a{color:var(--text);font-size:14px;padding:9px 10px;border-radius:10px;text-decoration:none;white-space:nowrap}
.primary-nav a:hover,.primary-nav a[aria-current="page"]{background:var(--lavender);color:var(--primary)}
.search-trigger,.menu-toggle{border:1px solid var(--border);background:#fff;color:var(--ink);padding:9px 13px;border-radius:11px}
.menu-toggle{display:none}

.hero{padding:72px 0 54px;overflow:hidden}
.hero--home{background:linear-gradient(180deg,#F6F4FF 0%,var(--bg) 100%)}
.hero-grid,.page-hero__grid{display:grid;grid-template-columns:1.06fr .94fr;align-items:center;gap:64px}
.hero-copy h1,.page-hero h1,.article-hero h1{font-size:clamp(42px,5vw,72px);line-height:1.07;letter-spacing:-.04em;margin:14px 0 22px;color:var(--ink)}
.eyebrow,.section-kicker{display:inline-flex;align-items:center;gap:8px;color:var(--primary);font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase}
.eyebrow::before,.section-kicker::before{content:"";width:20px;height:2px;background:currentColor;border-radius:2px}
.section-kicker--light{color:#C9C1FF}
.lead{font-size:18px;line-height:1.8;color:#4C4C59;margin:0;max-width:760px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:11px 18px;border-radius:12px;font-weight:700;text-decoration:none;border:1px solid transparent;transition:transform .18s ease,box-shadow .18s ease,background .18s ease}
.button:hover{text-decoration:none;transform:translateY(-1px)}
.button--primary{background:var(--primary);color:#fff;box-shadow:0 10px 24px rgba(111,90,232,.22)}
.button--primary:hover{background:#5E4AD7}
.button--accent{background:var(--accent);color:#2B241E;box-shadow:0 10px 24px rgba(242,154,74,.22)}
.button--accent:hover{background:#E98C3A}
.button--ghost{background:#fff;color:var(--ink);border-color:var(--border)}
.button--secondary{background:var(--lavender);color:var(--primary);border-color:#DDD7F6}
.button--light{background:#fff;color:var(--ink)}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 18px;padding:0;margin:30px 0 0;list-style:none;color:var(--muted);font-size:13px}
.hero-points li{position:relative;padding-left:18px}
.hero-points li::before{content:"";position:absolute;left:0;top:.72em;width:7px;height:7px;border-radius:50%;background:var(--primary-soft)}
.hero-visual{margin:0;background:#fff;padding:14px;border:1px solid var(--border);border-radius:32px;box-shadow:var(--shadow);transform:rotate(1deg)}
.hero-visual img{width:100%;border-radius:22px;aspect-ratio:1.38/1;object-fit:cover;background:var(--lavender)}
.hero-visual figcaption{font-size:12px;color:var(--muted);padding:12px 8px 2px}

.page-hero{padding:60px 0 54px;background:linear-gradient(180deg,#F5F2FF 0%,var(--bg) 100%)}
.page-hero--compact{padding-top:50px}
.page-hero--accent{background:linear-gradient(180deg,#FFF7ED 0%,var(--bg) 100%)}
.page-hero--dark{background:var(--ink);color:#fff}
.page-hero--dark h1,.page-hero--dark .lead{color:#fff}
.page-hero__grid>img{border-radius:28px;box-shadow:var(--shadow);aspect-ratio:1.5/1;object-fit:cover;background:var(--lavender)}
.article-hero{padding:56px 0;background:linear-gradient(180deg,#F4F1FF 0%,var(--bg) 100%)}
.article-hero__grid{display:grid;grid-template-columns:1.1fr .9fr;gap:54px;align-items:center}
.article-hero__grid>img{border-radius:24px;aspect-ratio:1.55/1;object-fit:cover;background:var(--lavender)}
.article-hero h1{font-size:clamp(36px,4.5vw,58px)}

.breadcrumbs{width:min(calc(100% - 40px),var(--max));margin:18px auto 0;font-size:13px;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;gap:8px}
.breadcrumbs a{color:var(--muted)}

.section{padding:76px 0}
.section--tight{padding:26px 0}
.section--intro{padding-top:62px}
.section--tint{background:#F3F2F8;border-top:1px solid #ECE9F5;border-bottom:1px solid #ECE9F5}
.section--lavender{background:var(--lavender)}
.section--dark{background:var(--ink);color:#EDEDF4}
.section--dark h2,.section--dark h3{color:#fff}
.section-heading{margin-bottom:34px;max-width:760px}
.section-heading h2,.prose h2,.content-rail h2,.editorial-grid h2,.link-cluster h2,.about-strip h2,.search-cta h2,.callout-row h2,.info-banner h2{font-size:clamp(28px,3vw,42px);line-height:1.2;letter-spacing:-.025em;color:var(--ink);margin:10px 0 14px}
.section--dark .section-heading h2,.section--dark .editorial-grid h2{color:#fff}
.section-heading p{color:var(--muted);font-size:16px;margin:0}
.split-heading{max-width:none;display:grid;grid-template-columns:1fr .8fr;gap:40px;align-items:end}

.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.feature-card{background:#fff;border:1px solid var(--border);border-radius:22px;overflow:hidden;box-shadow:0 10px 28px rgba(36,36,51,.04)}
.feature-card>img{width:100%;height:190px;object-fit:cover;background:var(--lavender)}
.feature-card__body{padding:24px}
.feature-card h3{font-size:21px;line-height:1.35;color:var(--ink);margin:0 0 11px}
.feature-card p{color:var(--muted);font-size:14px;margin:0 0 16px}
.text-link{font-weight:700;display:inline-flex;gap:7px;align-items:center}
.text-link::after{content:"→";transition:transform .18s ease}
.text-link:hover::after{transform:translateX(3px)}

.content-rail{display:grid;grid-template-columns:minmax(0,1fr) 350px;gap:54px;align-items:start}
.content-rail__main>h2:first-child{margin-top:0}
.prose{font-size:16px}
.prose p{margin:0 0 20px;color:#474752}
.prose h2{font-size:30px;margin:42px 0 15px}
.prose h3{color:var(--ink);font-size:21px;margin:30px 0 10px}
.prose a{font-weight:650}
.prose--light p{color:#D7D7E1}
.prose--light h2{color:#fff}
.info-stack{display:grid;gap:14px}
.info-card,.checklist-card,.sticky-card,.notice-board{background:#fff;border:1px solid var(--border);border-radius:20px;padding:24px}
.info-card span{font-size:12px;color:var(--muted)}
.info-card strong{display:block;color:var(--ink);font-size:18px;margin:5px 0}
.info-card p{margin:0;color:var(--muted);font-size:14px}
.checklist-card{position:sticky;top:98px;background:#FBFAFF}
.checklist-card--accent{background:#FFF9F1}
.checklist-card h2,.sticky-card h2,.notice-board h2{font-size:20px;color:var(--ink);margin:0 0 16px}
.check-list{margin:0;padding-left:24px;display:grid;gap:13px}
.check-list li{color:#4E4E59;padding-left:4px}
.notice-board ul{padding-left:20px;margin:0;display:grid;gap:10px}

.timeline-list{display:grid;gap:0;border-top:1px solid var(--border)}
.timeline-item{display:grid;grid-template-columns:70px 1fr;gap:30px;padding:34px 0;border-bottom:1px solid var(--border)}
.timeline-number{font-size:14px;font-weight:800;color:var(--primary);padding-top:7px}
.timeline-item h3{font-size:24px;line-height:1.35;color:var(--ink);margin:0 0 10px}
.timeline-item p{margin:0;color:var(--muted);max-width:850px}

.editorial-grid{display:grid;grid-template-columns:1fr .9fr;gap:60px;align-items:center}
.editorial-grid--reverse{grid-template-columns:.9fr 1fr}
.editorial-grid figure{margin:0}
.editorial-grid img{width:100%;border-radius:26px;aspect-ratio:1.45/1;object-fit:cover;background:var(--lavender)}
.editorial-grid p{color:#595966;margin:0 0 18px}
.section--dark .editorial-grid p{color:#D2D2DC}
.two-column-guide{display:grid;grid-template-columns:1fr .9fr;gap:58px;align-items:center}
.two-column-guide h2{font-size:36px;line-height:1.25;color:var(--ink);margin:12px 0 16px}
.two-column-guide p{color:var(--muted)}
.two-column-guide img{border-radius:24px;aspect-ratio:1.48/1;object-fit:cover;background:#fff}
.inline-actions{display:flex;flex-wrap:wrap;gap:24px;margin-top:22px}

.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.faq-item{background:#fff;border:1px solid var(--border);border-radius:16px;padding:0 20px}
.faq-item summary{cursor:pointer;list-style:none;font-weight:700;color:var(--ink);padding:18px 34px 18px 0;position:relative}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";position:absolute;right:0;top:16px;font-size:22px;color:var(--primary)}
.faq-item[open] summary::after{content:"−"}
.faq-item p{color:var(--muted);margin:0;padding:0 0 18px}
.faq-item--large{margin-bottom:14px}
.faq-item--large summary{font-size:17px;padding-top:22px;padding-bottom:22px}
.faq-answer{border-top:1px solid var(--border);padding-top:18px}
.center-action{text-align:center;margin:26px 0 0}

.about-strip{display:grid;grid-template-columns:1fr .62fr;gap:50px;align-items:center}
.about-strip__links{display:grid;gap:10px}
.about-strip__links a{background:#fff;border:1px solid var(--border);padding:15px 18px;border-radius:12px;color:var(--ink);font-weight:650}
.about-strip__links a:hover{color:var(--primary);text-decoration:none}

.step-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.step-grid--4{grid-template-columns:repeat(4,1fr)}
.step-grid article,.process-band article{background:#fff;border:1px solid var(--border);border-radius:18px;padding:24px}
.step-grid span,.process-band span,.contact-grid span,.safety-principles span{font-size:12px;font-weight:800;color:var(--primary)}
.step-grid h3,.process-band h3{font-size:18px;color:var(--ink);line-height:1.4;margin:8px 0}
.step-grid p,.process-band p{color:var(--muted);font-size:14px;margin:0 0 10px}
.process-band{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.process-band article{border-top:3px solid var(--accent)}

.link-cluster{display:grid;grid-template-columns:.68fr 1.32fr;gap:50px;align-items:start}
.link-cluster__items{display:grid;gap:12px}
.link-cluster__items a{display:grid;gap:5px;background:#fff;border:1px solid #DED8F5;border-radius:15px;padding:18px 20px;color:var(--ink)}
.link-cluster__items a:hover{text-decoration:none;border-color:var(--primary-soft)}
.link-cluster__items span{color:var(--muted);font-size:13px}

.category-jump{display:flex;flex-wrap:wrap;gap:10px}
.category-jump a{background:#fff;border:1px solid var(--border);color:var(--ink);padding:8px 13px;border-radius:999px;font-size:13px}
.guide-category+.guide-category{border-top:1px solid var(--border)}
.article-list{border-top:1px solid var(--border)}
.article-row{display:grid;grid-template-columns:1fr auto;gap:30px;align-items:center;padding:28px 0;border-bottom:1px solid var(--border)}
.article-row__tag{font-size:11px;color:var(--primary);font-weight:800}
.article-row h3{font-size:22px;line-height:1.35;margin:6px 0 8px}
.article-row h3 a{color:var(--ink)}
.article-row p{color:var(--muted);font-size:14px;margin:0;max-width:780px}
.article-row__link{white-space:nowrap;font-size:13px;font-weight:700}
.search-cta{display:grid;grid-template-columns:1fr .9fr;gap:50px;align-items:center}
.search-cta p{color:var(--muted);margin:0}

.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:60px;padding-top:62px;padding-bottom:72px}
.article-body section+section{margin-top:44px;padding-top:4px;border-top:1px solid var(--border)}
.article-body h2{scroll-margin-top:110px}
.article-aside .sticky-card{position:sticky;top:100px}
.sticky-card p{font-size:14px;color:var(--muted)}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.related-card{display:block;background:#fff;border:1px solid #DDD7F6;border-radius:18px;padding:22px;color:var(--ink)}
.related-card:hover{text-decoration:none;border-color:var(--primary-soft)}
.related-card span{font-size:11px;color:var(--primary);font-weight:800}
.related-card strong{display:block;font-size:18px;line-height:1.4;margin:7px 0}
.related-card p{color:var(--muted);font-size:13px;margin:0}

.faq-page-grid{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:46px;align-items:start}
.faq-side .sticky-card{position:sticky;top:100px}
.faq-side .button{width:100%;margin:10px 0 14px}
.callout-row{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.callout-row>div{background:#fff;border:1px solid var(--border);border-radius:20px;padding:30px}
.callout-row h2{font-size:27px}
.callout-row p{color:var(--muted)}
.callout-row a{font-weight:700}

.scenario-list{border-top:1px solid var(--border)}
.scenario-row{display:grid;grid-template-columns:60px minmax(0,1fr) auto;gap:26px;align-items:center;padding:31px 0;border-bottom:1px solid var(--border)}
.scenario-number{font-size:13px;font-weight:800;color:var(--primary)}
.scenario-row h2{font-size:23px;color:var(--ink);margin:0 0 7px}
.scenario-row p{color:var(--muted);margin:0}
.scenario-row>a{font-weight:700;white-space:nowrap}

.diagnostic-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.diagnostic-card{background:#fff;border:1px solid var(--border);border-radius:20px;padding:26px}
.diagnostic-card h3{font-size:21px;color:var(--ink);margin:0 0 14px}
.diagnostic-card ol{margin:0;padding-left:22px;display:grid;gap:10px;color:var(--muted)}
.safety-principles{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.safety-principles article{background:#fff;border:1px solid var(--border);border-radius:20px;padding:28px}
.safety-principles h2{font-size:22px;color:var(--ink);margin:8px 0 10px}
.safety-principles p{color:var(--muted);margin:0}
.principle-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.principle-grid article{background:#fff;border:1px solid var(--border);border-radius:20px;padding:28px}
.principle-grid h2{font-size:22px;color:var(--ink);margin:0 0 10px}
.principle-grid p{color:var(--muted);margin:0}

.contact-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.contact-grid article{background:#fff;border:1px solid var(--border);border-radius:20px;padding:24px}
.contact-grid h2{font-size:19px;line-height:1.4;color:var(--ink);margin:9px 0}
.contact-grid p{font-size:14px;color:var(--muted);margin:0}
.info-banner{display:flex;justify-content:space-between;gap:30px;align-items:center;background:#fff;border:1px solid var(--border);border-radius:22px;padding:34px}
.info-banner h2{font-size:28px}
.info-banner p{color:var(--muted);margin:0;max-width:760px}

.search-modal[hidden]{display:none !important}
.search-modal{position:fixed;inset:0;z-index:200;display:grid;place-items:start center;padding-top:11vh}
.search-backdrop{position:absolute;inset:0;background:rgba(20,20,30,.58)}
.search-panel{position:relative;z-index:1;width:min(calc(100% - 32px),620px);background:#fff;border-radius:24px;box-shadow:0 30px 90px rgba(10,10,20,.3);padding:34px}
.search-panel h2{color:var(--ink);font-size:28px;margin:0 0 8px}
.search-panel p{color:var(--muted);margin:0 0 22px}
.search-close{position:absolute;right:18px;top:14px;border:0;background:transparent;color:var(--muted);font-size:30px;line-height:1}
.search-form label{display:block;font-weight:700;color:var(--ink);margin-bottom:8px}
.search-row{display:flex;gap:10px}
.search-form input{min-width:0;flex:1;border:1px solid var(--border);background:#fff;color:var(--ink);border-radius:11px;padding:12px 14px;outline:none}
.search-form input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(111,90,232,.12)}
.search-form button{border:0;background:var(--primary);color:#fff;font-weight:700;border-radius:11px;padding:11px 18px}
.search-form--inline{display:flex;align-items:end;gap:10px}
.search-form--inline input{min-height:46px}
.search-form--page{max-width:760px;margin-bottom:34px}
.search-results-wrap{max-width:900px}
.search-summary{font-size:14px;color:var(--muted);padding-bottom:14px;border-bottom:1px solid var(--border)}
.search-results article{padding:26px 0;border-bottom:1px solid var(--border)}
.search-results h2{font-size:22px;margin:0 0 8px}
.search-results h2 a{color:var(--ink)}
.search-results p{color:var(--muted);margin:0 0 10px}
.empty-state{text-align:center;background:#fff;border:1px solid var(--border);border-radius:22px;padding:50px 32px}
.empty-state h1,.empty-state h2{color:var(--ink);font-size:34px;margin:0 0 12px}
.empty-state p{color:var(--muted);max-width:650px;margin:0 auto 24px}
.empty-state .hero-actions{justify-content:center}
.error-page{min-height:58vh;display:flex;align-items:center}
.empty-state--404{padding-top:58px;padding-bottom:58px}
.error-code{display:block;font-size:72px;line-height:1;font-weight:900;letter-spacing:-.05em;color:var(--primary-soft);margin-bottom:18px}

.notice{border-radius:16px;padding:18px 20px;margin:20px 0}
.notice strong{display:block;color:var(--ink)}
.notice p{margin:5px 0 0;color:var(--muted)}
.notice--soft{background:var(--lavender)}

.site-footer{background:#1F1F2A;color:#C9C9D3;padding:58px 0 26px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.3fr repeat(3,1fr);gap:42px}
.footer-grid h2{font-size:16px;color:#fff;margin:0 0 14px}
.footer-grid p{font-size:13px;color:#A9A9B6;margin:0;max-width:330px}
.footer-grid ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
.footer-grid a{color:#C9C9D3;font-size:13px}
.footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid #363643;margin-top:38px;padding-top:20px;font-size:12px;color:#8F8F9E}
.footer-bottom p{margin:0}
.footer-bottom a{color:#AFAFBB}
.back-top{position:fixed;right:22px;bottom:22px;width:44px;height:44px;border-radius:50%;border:1px solid var(--border);background:#fff;color:var(--ink);box-shadow:0 10px 30px rgba(0,0,0,.12);z-index:70}
.back-top[hidden]{display:none}

@media (max-width:1200px){
    .container{width:min(calc(100% - 36px),1120px)}
    .primary-nav{gap:2px}.primary-nav a{padding-inline:8px}
    .hero-grid,.page-hero__grid{gap:42px}
    .contact-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:1024px){
    .header-inner{min-height:70px;gap:12px}.brand{min-width:0;margin-right:auto}.brand small{display:none}
    .menu-toggle{display:inline-flex}
    .primary-nav{position:absolute;top:70px;left:18px;right:18px;display:none;flex-direction:column;align-items:stretch;background:#fff;border:1px solid var(--border);border-radius:16px;padding:10px;box-shadow:var(--shadow)}
    .primary-nav.is-open{display:flex}.primary-nav a{padding:11px 13px}
    .hero-grid,.page-hero__grid,.article-hero__grid{grid-template-columns:1fr 1fr;gap:34px}
    .content-rail{grid-template-columns:minmax(0,1fr) 300px;gap:34px}
    .feature-grid{gap:16px}
    .feature-card__body{padding:20px}
    .step-grid--4,.process-band{grid-template-columns:repeat(2,1fr)}
    .footer-grid{grid-template-columns:1.3fr 1fr 1fr}.footer-grid section:last-child{grid-column:2/4}
}
@media (max-width:768px){
    .container,.narrow{width:min(calc(100% - 28px),100%)}
    .search-trigger{font-size:0;width:42px;height:42px;padding:0}.search-trigger::before{content:"⌕";font-size:22px}
    .hero,.page-hero{padding:46px 0 40px}
    .hero-grid,.page-hero__grid,.article-hero__grid,.content-rail,.editorial-grid,.editorial-grid--reverse,.two-column-guide,.about-strip,.link-cluster,.search-cta,.article-layout,.faq-page-grid{grid-template-columns:1fr}
    .hero-grid,.page-hero__grid{gap:32px}.hero-copy h1,.page-hero h1{font-size:44px}
    .hero-visual{transform:none}.hero-visual img{aspect-ratio:1.5/1}
    .section{padding:58px 0}.split-heading{grid-template-columns:1fr;gap:10px}
    .feature-grid{grid-template-columns:1fr}.feature-card{display:grid;grid-template-columns:180px 1fr}.feature-card>img{height:100%;min-height:190px}
    .content-rail__aside{order:2}.checklist-card{position:static}
    .editorial-grid--reverse>img{order:2}.two-column-guide img{order:2}
    .faq-grid,.diagnostic-grid,.safety-principles,.principle-grid,.callout-row{grid-template-columns:1fr}
    .step-grid{grid-template-columns:1fr}.related-grid{grid-template-columns:1fr}
    .article-row{grid-template-columns:1fr;gap:12px}.article-row__link{justify-self:start}
    .article-layout{gap:28px;padding-top:46px}.article-aside .sticky-card,.faq-side .sticky-card{position:static}
    .scenario-row{grid-template-columns:48px 1fr}.scenario-row>a{grid-column:2;justify-self:start}
    .footer-grid{grid-template-columns:1fr 1fr}.footer-grid section:last-child{grid-column:auto}.footer-grid section:first-child{grid-column:1/-1}
}
@media (max-width:600px){
    .header-inner{min-height:64px}.brand img{width:40px;height:40px}.brand b{font-size:14px}.primary-nav{top:64px}
    .menu-toggle{padding:8px 10px}.hero-copy h1,.page-hero h1,.article-hero h1{font-size:38px}.lead{font-size:16px}
    .hero-actions{display:grid;grid-template-columns:1fr}.button{width:100%}
    .hero-points{display:grid;gap:7px}.section{padding:50px 0}.section-heading h2,.prose h2,.content-rail h2,.editorial-grid h2,.link-cluster h2,.about-strip h2,.search-cta h2,.callout-row h2,.info-banner h2{font-size:27px}
    .feature-card{grid-template-columns:1fr}.feature-card>img{height:200px}.timeline-item{grid-template-columns:42px 1fr;gap:12px}.timeline-item h3{font-size:20px}
    .step-grid--4,.process-band,.contact-grid{grid-template-columns:1fr}
    .category-jump{overflow:auto;flex-wrap:nowrap;padding-bottom:5px}.category-jump a{white-space:nowrap}
    .article-row h3{font-size:20px}.search-form--inline{display:block}.search-form--inline button{width:100%;margin-top:10px}
    .search-row{flex-direction:column}.search-row button{min-height:44px}
    .info-banner{display:block}.info-banner .button{margin-top:20px}
    .footer-grid{grid-template-columns:1fr}.footer-grid section:first-child{grid-column:auto}.footer-bottom{display:block}.footer-bottom a{display:inline-block;margin-top:8px}
}
@media (max-width:375px){
    .container,.narrow{width:min(calc(100% - 22px),100%)}
    .brand span{max-width:130px}.hero-copy h1,.page-hero h1,.article-hero h1{font-size:34px}
    .section{padding:44px 0}.feature-card__body,.diagnostic-card,.safety-principles article,.principle-grid article,.contact-grid article{padding:20px}
    .search-panel{padding:28px 20px}.search-panel h2{font-size:24px}
}