:root{
    --primary:#6F5AE8;
    --primary-soft:#9A8CF2;
    --ink:#242433;
    --text:#30303A;
    --muted:#70707D;
    --bg:#F8F8FC;
    --surface:#FFFFFF;
    --surface-2:#F0EEFA;
    --accent:#F29A4A;
    --border:#E4E1F1;
    --success:#4F8B73;
    --shadow:0 18px 50px rgba(36,36,51,.09);
    --radius:24px;
    --radius-sm:16px;
    --container:min(1180px,calc(100% - 48px));
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.75;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
a:hover{color:var(--primary)}
button,input{font:inherit}
button{cursor:pointer}
.skip-link{position:absolute;left:-9999px;top:auto}
.skip-link:focus{left:16px;top:16px;z-index:999;background:#fff;padding:10px 16px;border-radius:10px;box-shadow:var(--shadow)}
.site-header{position:sticky;top:0;z-index:60;background:rgba(248,248,252,.94);backdrop-filter:blur(16px);border-bottom:1px solid rgba(228,225,241,.8)}
.header-shell{width:var(--container);margin:0 auto;min-height:76px;display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:11px;margin-right:auto;min-width:0}
.brand img{width:44px;height:44px;object-fit:contain;border-radius:12px;background:var(--surface-2)}
.brand-copy{display:flex;flex-direction:column;line-height:1.2;min-width:0}
.brand-copy strong{font-size:17px;color:var(--ink);white-space:nowrap}
.brand-copy small{font-size:12px;color:var(--muted);margin-top:5px;white-space:nowrap}
.primary-nav{display:flex;align-items:center;gap:4px}
.primary-nav a{padding:9px 10px;border-radius:10px;color:#515160;font-size:14px;white-space:nowrap}
.primary-nav a:hover,.primary-nav a[aria-current="page"]{background:var(--surface-2);color:var(--primary)}
.menu-toggle{display:none;border:1px solid var(--border);background:var(--surface);padding:9px 12px;border-radius:10px;color:var(--ink)}
.search-toggle{border:0;background:var(--ink);color:#fff;padding:10px 14px;border-radius:12px;font-size:14px}
.search-toggle:hover{background:var(--primary)}
main{overflow:hidden}
.hero,.page-hero{width:var(--container);margin:0 auto;padding:72px 0 58px}
.home-hero{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(360px,.92fr);align-items:center;gap:64px;min-height:640px}
.hero__copy h1,.page-hero h1{font-size:clamp(38px,5vw,66px);line-height:1.08;letter-spacing:-.045em;margin:12px 0 24px;color:var(--ink);max-width:900px}
.hero__lead,.page-hero p{font-size:18px;line-height:1.8;color:#555565;max-width:800px;margin:0 0 30px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--primary);font-size:13px;font-weight:800;letter-spacing:.08em;text-transform:uppercase}
.eyebrow:before{content:"";width:24px;height:2px;background:currentColor;border-radius:2px}
.hero__actions,.button-group{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:11px 18px;border-radius:13px;font-weight:750;transition:transform .2s ease,box-shadow .2s ease,background .2s ease}
.button:hover{transform:translateY(-1px);color:inherit}
.button--primary{background:var(--primary);color:#fff;box-shadow:0 10px 28px rgba(111,90,232,.22)}
.button--primary:hover{background:#5f4ad8;color:#fff}
.button--accent{background:var(--accent);color:#33261a;box-shadow:0 10px 28px rgba(242,154,74,.2)}
.button--accent:hover{background:#eb8b36;color:#261d15}
.button--ghost{background:transparent;border:1px solid var(--border);color:var(--ink)}
.button--soft{background:var(--surface-2);color:var(--primary)}
.hero__signals{display:flex;gap:18px;flex-wrap:wrap;list-style:none;padding:0;margin:28px 0 0;color:var(--muted);font-size:13px}
.hero__signals li{position:relative;padding-left:16px}
.hero__signals li:before{content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:50%;background:var(--primary-soft)}
.hero__visual{position:relative}
.hero__visual:before{content:"";position:absolute;inset:8% -6% -7% 8%;background:var(--surface-2);border-radius:42% 58% 48% 52%/45% 38% 62% 55%;z-index:-1}
.hero__visual img{width:100%;aspect-ratio:1.08/1;object-fit:cover;border-radius:34px;box-shadow:var(--shadow)}
.section{width:var(--container);margin:0 auto;padding:84px 0}
.section--tinted{width:100%;padding-left:max(24px,calc((100% - 1180px)/2));padding-right:max(24px,calc((100% - 1180px)/2));background:var(--surface-2)}
.section-heading{max-width:760px;margin-bottom:34px}
.section-heading h2,.split-feature h2,.editorial-band h2,.guide-strip h2,.source-first h2,.callout-row h2,.article-note h2{font-size:clamp(28px,3.4vw,44px);line-height:1.18;letter-spacing:-.03em;color:var(--ink);margin:10px 0 14px}
.section-heading p,.split-feature p,.editorial-band p,.guide-strip p,.source-first p,.callout-row p{color:var(--muted);font-size:17px;margin:0}
.topic-lanes{display:grid;gap:18px}
.topic-lane{display:grid;grid-template-columns:180px 1fr;gap:28px;align-items:center;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px}
.topic-lane img{width:180px;height:132px;object-fit:cover;border-radius:18px}
.topic-lane__index{font-size:12px;color:var(--primary);font-weight:800}
.topic-lane h3{font-size:25px;line-height:1.25;margin:4px 0 8px;color:var(--ink)}
.topic-lane p{margin:0 0 8px;color:var(--muted)}
.text-link{color:var(--primary);font-weight:750;display:inline-flex;align-items:center;gap:6px}
.text-link:after{content:"→";transition:transform .2s ease}
.text-link:hover:after{transform:translateX(3px)}
.split-feature{display:grid;grid-template-columns:1fr 1fr;gap:62px;align-items:center}
.split-feature__visual img{width:100%;aspect-ratio:1.15/1;object-fit:cover;border-radius:28px;box-shadow:var(--shadow)}
.split-feature__copy p+p{margin-top:14px}
.split-feature__copy .button{margin-top:24px}
.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.article-card{background:var(--surface);border:1px solid var(--border);border-radius:20px;padding:24px;display:flex;flex-direction:column;min-height:280px;transition:transform .2s ease,box-shadow .2s ease}
.article-card:hover{transform:translateY(-3px);box-shadow:0 16px 38px rgba(36,36,51,.08)}
.article-card__meta{display:flex;justify-content:space-between;gap:12px;color:var(--muted);font-size:12px;margin-bottom:12px}
.article-card__meta span{color:var(--primary);font-weight:800}
.article-card h3{font-size:21px;line-height:1.45;color:var(--ink);margin:0 0 12px}
.article-card h3 a:hover{color:var(--primary)}
.article-card p{color:var(--muted);font-size:14px;line-height:1.75;margin:0 0 22px}
.article-card .text-link{margin-top:auto;font-size:14px}
.section-action{margin-top:28px}
.editorial-band{display:grid;grid-template-columns:1.25fr .75fr;gap:52px;align-items:center;background:var(--ink);color:#fff;border-radius:32px;padding:48px}
.editorial-band h2{color:#fff}
.editorial-band p{color:#c8c6d4}
.editorial-band img{width:100%;aspect-ratio:1/1;object-fit:cover;border-radius:24px}
.editorial-band__links{display:grid;gap:10px;margin-top:24px}
.editorial-band__links a{color:#fff;border-bottom:1px solid rgba(255,255,255,.18);padding:10px 0}
.editorial-band__links a:hover{color:#c8c0ff}
.guide-strip{display:grid;grid-template-columns:.78fr 1.22fr;gap:56px;align-items:center}
.guide-strip__image img{border-radius:28px;aspect-ratio:.88/1;object-fit:cover;box-shadow:var(--shadow)}
.check-list{list-style:none;padding:0;margin:24px 0 26px;display:grid;gap:10px}
.check-list li{position:relative;padding-left:28px}
.check-list li:before{content:"✓";position:absolute;left:0;color:var(--success);font-weight:900}
.faq-list{display:grid;gap:12px}
.faq-list details{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:0 18px}
.faq-list summary{list-style:none;cursor:pointer;color:var(--ink);font-weight:750;padding:18px 40px 18px 0;position:relative}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary:after{content:"+";position:absolute;right:4px;top:16px;width:28px;height:28px;border-radius:50%;display:grid;place-items:center;background:var(--surface-2);color:var(--primary)}
.faq-list details[open] summary:after{content:"−"}
.faq-list details p{margin:-4px 0 18px;color:var(--muted);padding-right:30px}
.closing-map{display:grid;grid-template-columns:.72fr 1.28fr;gap:48px;align-items:start}
.closing-map h2{font-size:40px;line-height:1.2;color:var(--ink);margin:10px 0}
.closing-map p{color:var(--muted)}
.closing-map__links{display:grid;gap:12px}
.closing-map__links a{display:flex;align-items:flex-start;gap:18px;background:var(--surface);border:1px solid var(--border);border-radius:18px;padding:20px}
.closing-map__links strong{min-width:96px;color:var(--ink)}
.closing-map__links span{color:var(--muted);font-size:14px}
.breadcrumbs{width:var(--container);margin:20px auto 0;font-size:13px;color:var(--muted)}
.breadcrumbs ol{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:0}
.breadcrumbs li:not(:last-child):after{content:"/";margin-left:8px;color:#aaa8b3}
.breadcrumbs a:hover{color:var(--primary)}
.page-hero{display:grid;grid-template-columns:1.2fr .8fr;gap:52px;align-items:center;padding-top:54px}
.page-hero h1{font-size:clamp(36px,4.6vw,58px)}
.page-hero img{width:100%;aspect-ratio:1.08/1;object-fit:cover;border-radius:28px;box-shadow:var(--shadow)}
.content-split{display:grid;grid-template-columns:1.2fr .8fr;gap:42px;align-items:start}
.content-split__main h2,.guide-index h2,.prose-grid h2,.prose-stack h2,.feedback-grid h2,.safety-columns h2{font-size:30px;line-height:1.25;color:var(--ink);margin:0 0 16px}
.content-split__main p,.guide-index p,.prose-grid p,.prose-stack p,.feedback-grid p,.safety-columns li{color:var(--muted);font-size:16px}
.note-card{background:var(--ink);color:#fff;border-radius:24px;padding:28px}
.note-card h2{margin:0 0 14px;font-size:24px}
.note-card ul{padding-left:20px;margin:0;color:#cfced9;display:grid;gap:8px}
.step-list{list-style:none;padding:0;margin:0;counter-reset:steps;display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.step-list li{counter-increment:steps;background:var(--surface);border:1px solid var(--border);border-radius:20px;padding:26px;display:grid;gap:8px}
.step-list li:before{content:"0" counter(steps);color:var(--primary);font-weight:900;font-size:13px}
.step-list strong{font-size:20px;color:var(--ink)}
.step-list span{color:var(--muted)}
.callout-row{display:flex;align-items:center;justify-content:space-between;gap:34px;background:var(--surface);border:1px solid var(--border);border-radius:24px;padding:34px}
.callout-row h2{font-size:30px;margin-top:0}
.callout-row p{max-width:720px}
.source-first{display:grid;grid-template-columns:180px 1fr;gap:46px;align-items:start}
.source-first__label{font-size:13px;font-weight:900;color:var(--accent);text-transform:uppercase;letter-spacing:.12em;padding-top:12px;border-top:2px solid var(--accent)}
.check-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.check-grid article{background:var(--surface);border:1px solid var(--border);border-radius:20px;padding:22px}
.check-grid span{color:var(--accent);font-size:12px;font-weight:900}
.check-grid h3{font-size:20px;color:var(--ink);margin:8px 0}
.check-grid p{font-size:14px;color:var(--muted);margin:0}
.info-banner{display:grid;grid-template-columns:.45fr 1.55fr;gap:32px;align-items:center;background:var(--surface-2);border-radius:28px;padding:30px}
.info-banner img{width:100%;aspect-ratio:1.1/1;object-fit:cover;border-radius:20px}
.info-banner h2{font-size:32px;line-height:1.25;color:var(--ink);margin:0 0 12px}
.info-banner p{color:var(--muted)}
.guide-index{display:grid;grid-template-columns:.8fr 1.2fr;gap:46px}
.guide-index aside{background:var(--surface);border:1px solid var(--border);border-radius:22px;padding:26px}
.guide-index ul{padding-left:20px;color:var(--muted);display:grid;gap:9px}
.guide-index strong{color:var(--ink)}
.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:18px;background:var(--surface)}
table{width:100%;border-collapse:collapse;min-width:720px}
th,td{text-align:left;padding:16px 18px;border-bottom:1px solid var(--border);vertical-align:top}
th{background:var(--surface-2);color:var(--ink);font-size:14px}
td{color:var(--muted)}
td a{color:var(--primary);font-weight:750}
.faq-layout{display:grid;grid-template-columns:1.3fr .7fr;gap:38px;align-items:start}
.faq-list--large details{padding:0 22px}
.faq-side{position:sticky;top:110px;background:var(--ink);color:#fff;border-radius:24px;padding:26px}
.faq-side h2{margin:0 0 10px;font-size:24px}
.faq-side p{color:#c9c8d5}
.faq-side ul{list-style:none;padding:0;margin:18px 0 0;display:grid;gap:8px}
.faq-side a{display:block;padding:10px 0;border-bottom:1px solid rgba(255,255,255,.12);color:#fff}
.prose-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.prose-grid article,.feedback-grid article{background:var(--surface);border:1px solid var(--border);border-radius:22px;padding:28px}
.prose-grid p+p{margin-top:12px}
.safety-columns{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.safety-columns article{background:var(--surface);border:1px solid var(--border);border-radius:22px;padding:26px}
.safety-columns ul{padding-left:20px;display:grid;gap:10px;margin:0}
.prose-stack{max-width:920px}
.prose-stack article{padding:28px 0;border-bottom:1px solid var(--border)}
.prose-stack code{background:var(--surface-2);padding:2px 6px;border-radius:6px;color:var(--ink)}
.feedback-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.search-page{max-width:980px}
.search-form label{display:block;color:var(--ink);font-weight:750;margin-bottom:8px}
.search-form__row{display:flex;gap:10px}
.search-form input{width:100%;min-width:0;border:1px solid var(--border);background:var(--surface);border-radius:12px;padding:12px 14px;color:var(--ink);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;border-radius:12px;padding:11px 17px;background:var(--primary);color:#fff;font-weight:750;white-space:nowrap}
.search-form--page{background:var(--surface);border:1px solid var(--border);border-radius:20px;padding:24px;margin-bottom:34px}
.search-results{display:grid;gap:14px}
.search-results article{background:var(--surface);border:1px solid var(--border);border-radius:18px;padding:22px}
.search-results article>span{font-size:12px;font-weight:900;color:var(--primary)}
.search-results h3{font-size:21px;margin:6px 0;color:var(--ink)}
.search-results p{margin:0;color:var(--muted)}
.empty-state{text-align:center;background:var(--surface);border:1px dashed #cbc6e2;border-radius:24px;padding:54px 24px}
.empty-state h2{font-size:28px;color:var(--ink);margin:0 0 8px}
.empty-state p{color:var(--muted);margin:0 auto 22px;max-width:620px}
.article-page{width:min(920px,calc(100% - 48px));margin:0 auto;padding:48px 0 20px}
.article-header{display:grid;grid-template-columns:1.25fr .75fr;gap:38px;align-items:center;padding-bottom:42px;border-bottom:1px solid var(--border)}
.article-header h1{font-size:clamp(34px,4.7vw,54px);line-height:1.15;letter-spacing:-.035em;color:var(--ink);margin:10px 0 18px}
.article-lead{font-size:18px;color:var(--muted)}
.article-date{font-size:13px;color:#8a8993}
.article-header img{width:100%;aspect-ratio:1/1;object-fit:cover;border-radius:24px;box-shadow:var(--shadow)}
.article-body{max-width:760px;margin:0 auto;padding:24px 0}
.article-body section{padding:28px 0;border-bottom:1px solid var(--border)}
.article-body h2{font-size:30px;line-height:1.3;color:var(--ink);margin:0 0 16px}
.article-body p{font-size:17px;line-height:1.95;color:#4e4e5a;margin:0}
.article-body p+p{margin-top:15px}
.article-note{max-width:760px;margin:16px auto 0;background:var(--surface-2);border-left:4px solid var(--primary);border-radius:0 18px 18px 0;padding:24px 26px}
.article-note h2{font-size:23px;margin-top:0}
.article-note p{color:var(--muted);margin:0}
.related-section{padding-top:56px}
.not-found{width:min(780px,calc(100% - 48px));margin:0 auto;text-align:center;padding:110px 0}
.not-found__code{font-size:86px;font-weight:900;letter-spacing:-.06em;color:var(--primary)}
.not-found h1{font-size:40px;color:var(--ink);margin:0 0 12px}
.not-found p{color:var(--muted);font-size:17px;max-width:650px;margin:0 auto 26px}
.not-found .button-group{justify-content:center}
.not-found__links{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:36px}
.not-found__links a{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:14px}
.search-modal[hidden]{display:none !important}
.search-modal{position:fixed;inset:0;z-index:100;display:grid;place-items:start center;padding-top:10vh}
.search-modal__backdrop{position:absolute;inset:0;background:rgba(25,24,36,.62);backdrop-filter:blur(5px)}
.search-modal__panel{position:relative;width:min(680px,calc(100% - 32px));background:var(--surface);border-radius:24px;padding:30px;box-shadow:0 28px 90px rgba(0,0,0,.25)}
.search-modal__panel h2{font-size:30px;color:var(--ink);margin:0 0 8px}
.search-modal__panel p{color:var(--muted);margin:0 0 22px}
.search-modal__close{position:absolute;right:18px;top:18px;border:0;background:var(--surface-2);color:var(--ink);padding:7px 10px;border-radius:9px}
body.modal-open{overflow:hidden}
.back-top{position:fixed;right:24px;bottom:24px;z-index:45;border:0;background:var(--ink);color:#fff;border-radius:999px;padding:11px 15px;box-shadow:var(--shadow)}
.site-footer{background:var(--ink);color:#fff;margin-top:30px}
.footer-grid{width:var(--container);margin:0 auto;display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:54px;padding:58px 0 42px}
.footer-grid h2{font-size:18px;margin:0 0 12px}
.footer-grid p{color:#b9b8c6;max-width:520px}
.footer-grid ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
.footer-grid a{color:#d2d1dc}
.footer-grid a:hover{color:#bdb3ff}
.footer-bottom{width:var(--container);margin:0 auto;padding:18px 0 28px;border-top:1px solid rgba(255,255,255,.1);display:flex;justify-content:space-between;gap:20px;color:#9594a2;font-size:13px}
.footer-bottom p{margin:0}
.footer-bottom a{color:#c2c0cf}
@media (max-width:1100px){
    :root{--container:min(100% - 40px,980px)}
    .primary-nav{position:absolute;left:20px;right:20px;top:70px;background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:12px;box-shadow:var(--shadow);display:none;flex-direction:column;align-items:stretch}
    .primary-nav.is-open{display:flex}
    .primary-nav a{padding:11px 12px}
    .menu-toggle{display:inline-flex}
    .home-hero{grid-template-columns:1fr 380px;gap:36px}
    .article-grid{grid-template-columns:repeat(2,1fr)}
    .check-grid{grid-template-columns:repeat(2,1fr)}
    .safety-columns{grid-template-columns:1fr}
}
@media (max-width:820px){
    :root{--container:calc(100% - 32px)}
    .header-shell{min-height:68px;gap:10px}
    .brand-copy small{display:none}
    .search-toggle{padding:9px 11px}
    .hero,.page-hero,.section{padding-top:56px;padding-bottom:56px}
    .home-hero,.page-hero,.split-feature,.guide-strip,.closing-map,.content-split,.guide-index,.faq-layout,.article-header{grid-template-columns:1fr}
    .home-hero{min-height:auto}
    .hero__visual{max-width:620px}
    .page-hero img{max-width:560px}
    .editorial-band{grid-template-columns:1fr;padding:34px}
    .editorial-band img{max-width:420px}
    .article-grid{grid-template-columns:1fr}
    .topic-lane{grid-template-columns:140px 1fr}
    .topic-lane img{width:140px;height:118px}
    .step-list{grid-template-columns:1fr}
    .source-first{grid-template-columns:1fr;gap:18px}
    .source-first__label{max-width:180px}
    .info-banner{grid-template-columns:180px 1fr}
    .prose-grid,.feedback-grid{grid-template-columns:1fr}
    .faq-side{position:static}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
    .footer-grid section:first-child{grid-column:1/-1}
}
@media (max-width:600px){
    :root{--container:calc(100% - 24px)}
    .brand img{width:38px;height:38px}
    .brand-copy strong{font-size:15px}
    .menu-toggle,.search-toggle{font-size:13px}
    .hero__copy h1,.page-hero h1{font-size:38px}
    .hero__lead,.page-hero p{font-size:16px}
    .hero__actions,.button-group{align-items:stretch}
    .button{width:100%}
    .topic-lane{grid-template-columns:1fr}
    .topic-lane img{width:100%;height:auto;aspect-ratio:1.8/1}
    .editorial-band{border-radius:22px;padding:24px}
    .section-heading h2,.split-feature h2,.editorial-band h2,.guide-strip h2,.source-first h2,.callout-row h2,.article-note h2{font-size:30px}
    .check-grid{grid-template-columns:1fr}
    .callout-row{flex-direction:column;align-items:stretch;padding:26px}
    .info-banner{grid-template-columns:1fr}
    .info-banner img{max-width:280px}
    .article-page{width:calc(100% - 24px)}
    .article-header h1{font-size:36px}
    .article-body h2{font-size:27px}
    .not-found__links{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:1fr}
    .footer-grid section:first-child{grid-column:auto}
    .footer-bottom{flex-direction:column}
    .search-form__row{flex-direction:column}
    .search-form button{width:100%}
}
@media (max-width:390px){
    .brand-copy{display:none}
    .hero__copy h1,.page-hero h1{font-size:34px}
    .hero,.page-hero,.section{padding-top:46px;padding-bottom:46px}
}