:root{
  --brand:#6D28D9;--brand-soft:#A78BFA;--ink:#17151C;--bg:#F7F5FA;--soft:#ECE8F2;
  --text:#27242D;--muted:#716B78;--accent:#F59E0B;--white:#fff;--border:#dcd5e5;
  --shell:min(1180px,calc(100% - 48px));--narrow:min(800px,calc(100% - 48px));
  --radius:22px;--radius-sm:14px;--shadow:0 18px 55px rgba(23,21,28,.09);
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}body.modal-open{overflow:hidden}img{max-width:100%;height:auto;display:block}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}.shell{width:var(--shell);margin-inline:auto}.narrow{width:var(--narrow);margin-inline:auto}.skip-link{position:fixed;left:12px;top:-80px;z-index:999;padding:10px 16px;background:var(--accent);color:var(--ink);font-weight:800;border-radius:10px}.skip-link:focus{top:12px}.eyebrow{margin:0 0 10px;color:var(--brand);font-weight:800;letter-spacing:.08em;font-size:.78rem;text-transform:uppercase}.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:10px 18px;border-radius:999px;border:1px solid var(--brand);background:var(--brand);color:#fff;font-weight:800;line-height:1.2;transition:transform .2s ease,box-shadow .2s ease,background .2s ease}.button:hover{transform:translateY(-1px);box-shadow:0 10px 24px rgba(109,40,217,.2)}.button--ghost{background:transparent;color:var(--brand)}.button--light{background:#fff;color:var(--ink);border-color:#fff}.text-link{display:inline-flex;align-items:center;gap:8px;color:var(--brand);font-weight:800}.text-link::after{content:"→";transition:transform .2s ease}.text-link:hover::after{transform:translateX(4px)}.action-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.site-header{position:sticky;top:0;z-index:100;background:rgba(247,245,250,.94);backdrop-filter:blur(14px);border-bottom:1px solid transparent;transition:box-shadow .2s,border-color .2s}.site-header.has-shadow{box-shadow:0 10px 32px rgba(23,21,28,.08);border-color:var(--border)}.header-inner{min-height:78px;display:flex;align-items:center;gap:22px}.brand{display:inline-flex;align-items:center;gap:11px;margin-right:auto}.brand img{width:44px;height:44px;object-fit:cover;border-radius:13px;background:var(--soft)}.brand span{display:grid;line-height:1.2}.brand strong{font-size:1.15rem;color:var(--ink)}.brand small{font-size:.7rem;color:var(--muted);margin-top:3px}.main-nav{display:flex;align-items:center;gap:3px}.main-nav a{padding:8px 11px;border-radius:999px;font-size:.92rem;font-weight:700;color:#4b4651}.main-nav a:hover,.main-nav a[aria-current="page"]{background:#fff;color:var(--brand)}.search-open,.menu-toggle,.back-top{border:1px solid var(--border);background:#fff;color:var(--ink);font-weight:800;border-radius:999px;padding:8px 13px}.menu-toggle{display:none}.search-modal[hidden]{display:none!important}.search-modal{position:fixed;inset:0;z-index:400;display:grid;place-items:start center;padding-top:12vh}.search-backdrop{position:absolute;inset:0;background:rgba(23,21,28,.72);backdrop-filter:blur(8px)}.search-dialog{position:relative;width:min(700px,calc(100% - 32px));background:#fff;border-radius:var(--radius);padding:34px;box-shadow:0 30px 100px rgba(0,0,0,.28)}.search-dialog h2{margin:0 0 8px;font-size:clamp(1.7rem,4vw,2.5rem);line-height:1.15}.search-dialog p:not(.eyebrow){color:var(--muted)}.search-close{position:absolute;right:18px;top:15px;border:0;background:transparent;font-size:2rem;line-height:1;color:var(--muted)}.search-form label{display:block;margin-bottom:7px;font-weight:800}.search-form__row{display:flex;gap:10px}.search-form input{width:100%;min-height:50px;border:1px solid var(--border);background:var(--bg);border-radius:14px;padding:10px 14px;outline:none}.search-form input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(109,40,217,.12)}
.site-main{overflow:hidden}.home-lead{padding:54px 0 40px}.lead-grid{display:grid;grid-template-columns:minmax(0,1.02fr) minmax(420px,.98fr);gap:54px;align-items:center}.lead-copy h1{font-size:clamp(2.7rem,6vw,5.5rem);line-height:.98;letter-spacing:-.045em;margin:0 0 24px;color:var(--ink);max-width:830px}.lead-text{font-size:1.1rem;color:#554f5c;max-width:760px;margin:0 0 24px}.lead-links{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:30px}.lead-facts{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--border);border:1px solid var(--border);border-radius:18px;overflow:hidden;margin:0}.lead-facts div{background:#fff;padding:15px}.lead-facts dt{font-size:.73rem;color:var(--muted);font-weight:800}.lead-facts dd{margin:2px 0 0;font-weight:800}.lead-media{margin:0;position:relative}.lead-media img{width:100%;aspect-ratio:1.12/1;object-fit:cover;border-radius:32px 32px 100px 32px;box-shadow:var(--shadow)}.lead-media figcaption{width:min(88%,520px);margin:-40px auto 0;position:relative;background:#fff;border-radius:18px;padding:16px 18px;box-shadow:var(--shadow);font-size:.88rem;color:var(--muted)}
.section{padding:82px 0}.section--tight{padding:54px 0}.section--soft{background:var(--soft)}.section--dark{background:var(--ink);color:#fff}.section--ink{background:#24202a;color:#fff}.section-heading{max-width:760px;margin:0 auto 34px;text-align:center}.section-heading--left{text-align:left;margin-left:0}.section-heading--inverse .eyebrow,.section--dark .eyebrow,.section--ink .eyebrow{color:var(--brand-soft)}.section-heading h2,.next-band h2,.free-band h2,.editorial-note h2,.topic-map h2,.faq-preview h2,.dimension-row h2{font-size:clamp(2rem,4vw,3.4rem);line-height:1.08;letter-spacing:-.035em;margin:0 0 14px}.section-heading p:not(.eyebrow){color:var(--muted);margin:0}.section-heading--inverse p:not(.eyebrow),.section--dark p,.section--ink p{color:#c8c1cf}.section-heading--row{max-width:none;display:flex;align-items:end;justify-content:space-between;gap:20px}
.split-core{display:grid;grid-template-columns:.7fr 1.3fr;gap:70px;align-items:start}.core-index{border-top:1px solid var(--border)}.core-index__item{display:grid;grid-template-columns:58px 1fr;gap:16px;padding:26px 0;border-bottom:1px solid var(--border)}.index-no{color:var(--brand);font-weight:900}.core-index__item span:last-child{display:grid;gap:6px}.core-index__item strong{font-size:1.35rem;color:var(--ink)}.core-index__item small{font-size:.95rem;color:var(--muted)}.watch-layout{display:grid;grid-template-columns:1.12fr .88fr;gap:28px;align-items:start}.watch-feature{margin:0}.watch-feature img{width:100%;aspect-ratio:1.45/1;object-fit:cover;border-radius:28px}.watch-feature figcaption{padding:16px 0;display:grid}.watch-feature figcaption span{color:#aaa2b2;font-size:.9rem}.watch-list{display:grid;border-top:1px solid #3a3542}.watch-list a{padding:18px 0;border-bottom:1px solid #3a3542;display:grid;gap:5px}.watch-list a>span{font-size:.72rem;color:var(--brand-soft);font-weight:800}.watch-list strong{font-size:1.05rem}.watch-list small{color:#aaa2b2;line-height:1.55}.section-cta{margin-top:28px}.editorial-path{display:grid;gap:0;border-top:1px solid var(--border)}.path-item{display:grid;grid-template-columns:190px 1fr;gap:26px;padding:24px 0;border-bottom:1px solid var(--border);align-items:center}.path-item img{width:190px;height:126px;object-fit:cover;border-radius:16px}.path-item>div>span{font-size:.72rem;color:var(--brand);font-weight:900}.path-item h3{margin:3px 0 5px;font-size:1.25rem}.path-item p{margin:0 0 6px;color:var(--muted)}.free-band{display:grid;grid-template-columns:1fr minmax(340px,.65fr);gap:50px;align-items:center}.free-band p:not(.eyebrow){color:#5d5664}.free-band img{width:100%;border-radius:24px;aspect-ratio:1.5/1;object-fit:cover}.topic-map{display:grid;grid-template-columns:.78fr 1.22fr;gap:70px}.topic-map__intro p:not(.eyebrow){color:var(--muted)}.topic-lines{display:grid;border-top:1px solid var(--border)}.topic-line{padding:18px 0;border-bottom:1px solid var(--border);display:grid;grid-template-columns:210px 1fr;gap:18px;align-items:start}.topic-line__name{font-weight:900;color:var(--ink)}.topic-line__desc{color:var(--muted);font-size:.92rem}.editorial-note{display:grid;grid-template-columns:minmax(320px,.8fr) 1.2fr;gap:54px;align-items:center}.editorial-note>img{width:100%;border-radius:28px;aspect-ratio:1.3/1;object-fit:cover}.check-list{list-style:none;padding:0;margin:20px 0 0;display:grid;gap:10px}.check-list li{position:relative;padding-left:25px}.check-list li::before{content:"✓";position:absolute;left:0;color:var(--accent);font-weight:900}.story-stack{border-top:1px solid var(--border)}.story-row{display:grid;grid-template-columns:170px 1fr 200px;gap:26px;align-items:start;padding:24px 0;border-bottom:1px solid var(--border)}.story-meta{display:grid;gap:2px;color:var(--muted);font-size:.78rem}.story-row h3{margin:0;font-size:1.18rem;line-height:1.35}.story-row h3 a:hover{color:var(--brand)}.story-row p{grid-column:2/3;margin:2px 0 0;color:var(--muted);font-size:.92rem}.story-row>.text-link{grid-column:3;grid-row:1/3;align-self:center;font-size:.86rem}.dimension-row{display:grid;grid-template-columns:1fr minmax(320px,.7fr);gap:50px;align-items:center}.dimension-row p:not(.eyebrow){color:var(--muted)}.dimension-row img{width:100%;border-radius:24px;aspect-ratio:1.5/1;object-fit:cover}.faq-preview{display:grid;grid-template-columns:.72fr 1.28fr;gap:68px;align-items:start}.faq-preview>div:first-child>p:not(.eyebrow){color:var(--muted)}.faq-mini{border-top:1px solid var(--border)}.faq-mini>div{padding:18px 0;border-bottom:1px solid var(--border)}.faq-mini strong{font-size:1.03rem}.faq-mini p{margin:6px 0 0;color:var(--muted);font-size:.92rem}
.breadcrumb{width:var(--shell);margin:18px auto 0;font-size:.8rem;color:var(--muted)}.breadcrumb ol{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:8px}.breadcrumb li:not(:last-child)::after{content:"/";margin-left:8px;color:#aaa3af}.breadcrumb a:hover{color:var(--brand)}.page-hero{padding:48px 0 60px}.page-hero--plain{padding-bottom:30px}.compact-hero-grid{display:grid;grid-template-columns:1fr minmax(360px,.72fr);gap:54px;align-items:center}.compact-hero-grid h1,.narrow-left h1,.video-hero h1,.article-header h1{font-size:clamp(2.5rem,5vw,4.9rem);line-height:1.02;letter-spacing:-.045em;margin:0 0 18px}.compact-hero-grid p:not(.eyebrow),.narrow-left>p:not(.eyebrow){font-size:1.08rem;color:var(--muted);max-width:760px}.compact-hero-grid img{width:100%;border-radius:24px;aspect-ratio:1.5/1;object-fit:cover}.narrow-left{max-width:900px}.info-columns,.free-criteria{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}.info-columns article,.free-criteria>div{padding:26px;border-right:1px solid var(--border)}.info-columns article:first-child,.free-criteria>div:first-child{padding-left:0}.info-columns article:last-child,.free-criteria>div:last-child{border-right:0;padding-right:0}.info-columns span,.free-criteria span{color:var(--brand);font-size:.76rem;font-weight:900}.info-columns h2,.free-criteria h2{font-size:1.25rem;line-height:1.35}.info-columns p,.free-criteria p{color:var(--muted);font-size:.93rem}.brand-check{display:grid;grid-template-columns:1.05fr .95fr;gap:54px;align-items:center}.brand-check h2{font-size:clamp(2rem,4vw,3rem);line-height:1.1}.brand-check ol{padding-left:20px}.brand-check li{margin:12px 0}.brand-check img{width:100%;border-radius:24px}.next-band{display:flex;align-items:center;justify-content:space-between;gap:40px}.next-band>div:first-child{max-width:760px}.next-band h2{margin-bottom:8px}.video-hero{padding:50px 0 64px}.video-hero-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:56px;align-items:center}.video-hero p:not(.eyebrow){font-size:1.08rem;color:var(--muted)}.video-hero figure{margin:0}.video-hero figure img{width:100%;border-radius:32px;aspect-ratio:1.45/1;object-fit:cover}.video-hero figcaption{font-size:.86rem;color:var(--muted);margin-top:10px}.metrics-like{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:#3a3542;border:1px solid #3a3542}.metrics-like>div{background:#211e26;padding:26px;display:grid;gap:6px}.metrics-like strong{font-size:1.2rem}.metrics-like span{font-size:.9rem;color:#bcb4c3}.content-index-grid{display:grid;grid-template-columns:300px 1fr;gap:54px;align-items:start}.content-index-grid aside{position:sticky;top:108px}.content-index-grid aside h2{font-size:2rem;line-height:1.15}.content-index-grid aside>p:not(.eyebrow){color:var(--muted)}.sticky-index{display:grid;margin-top:24px;border-top:1px solid var(--border)}.sticky-index a{padding:13px 0;border-bottom:1px solid var(--border);display:grid}.sticky-index a span{font-size:.78rem;color:var(--muted);line-height:1.5}.category-stream{display:grid;gap:70px}.category-block{scroll-margin-top:110px}.category-block__head{display:grid;grid-template-columns:150px 1fr;gap:20px;align-items:center;margin-bottom:12px}.category-block__head img{width:150px;height:100px;object-fit:cover;border-radius:14px}.category-block__head h2{font-size:1.4rem;line-height:1.35;margin:0}.topic-ribbon{display:grid;grid-template-columns:.72fr 1.28fr;gap:60px}.topic-ribbon h2{font-size:2.2rem;line-height:1.1}.free-criteria{grid-template-columns:repeat(3,1fr)}.topic-boundary{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--border);border:1px solid var(--border)}.topic-boundary>div{background:#fff;padding:30px}.topic-boundary h2{margin-top:0}.topic-boundary p{color:var(--muted)}.topic-catalog{display:grid;gap:1px;background:var(--border);border:1px solid var(--border)}.topic-card{background:var(--bg);display:grid;grid-template-columns:380px 1fr;gap:36px;padding:30px}.topic-card__media img{width:100%;height:230px;object-fit:cover;border-radius:18px}.topic-card__body>span{font-size:.75rem;color:var(--brand);font-weight:900}.topic-card h2{font-size:1.7rem;margin:5px 0 8px}.topic-card p{color:var(--muted);margin:0 0 12px}.page-hero--topic{background:var(--soft)}.topic-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.topic-summary>div{padding-top:14px;border-top:3px solid var(--brand)}.topic-summary span{font-size:.76rem;color:var(--brand);font-weight:900}.topic-summary p{color:var(--muted)}
.article-header{padding:52px 0 30px}.article-header__inner{max-width:980px}.article-deck{max-width:900px;font-size:1.15rem;color:var(--muted)}.article-meta{display:flex;gap:16px;flex-wrap:wrap;color:var(--muted);font-size:.82rem}.article-layout{display:grid;grid-template-columns:280px minmax(0,760px);gap:70px;justify-content:center;align-items:start;padding:30px 0 80px}.article-aside{position:sticky;top:110px}.article-aside img{width:100%;height:170px;object-fit:cover;border-radius:16px;margin-bottom:16px}.article-aside>strong{display:block;margin-bottom:8px}.article-aside ul{list-style:none;padding:0;margin:0;border-top:1px solid var(--border)}.article-aside li{border-bottom:1px solid var(--border)}.article-aside a{display:block;padding:10px 0;font-size:.82rem;color:var(--muted)}.article-aside a:hover{color:var(--brand)}.article-body section{scroll-margin-top:105px}.article-body h2{font-size:clamp(1.65rem,3vw,2.25rem);line-height:1.2;margin:0 0 18px;padding-top:26px}.article-body p{font-size:1.02rem;line-height:1.9;margin:0 0 18px;color:#403b46}.article-callout{margin-top:34px;padding:26px;border-left:4px solid var(--accent);background:var(--soft);border-radius:0 18px 18px 0}.article-callout h2{padding-top:0}.related-section{padding-bottom:80px}.browse-steps,.safety-list{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--border);border:1px solid var(--border)}.browse-steps article,.safety-list article{background:#fff;padding:30px}.browse-steps span,.safety-list span{color:var(--brand);font-weight:900}.browse-steps h2,.safety-list h2{font-size:1.3rem}.browse-steps p,.safety-list p{color:var(--muted)}.mobile-guide{display:grid;grid-template-columns:minmax(300px,.75fr) 1.25fr;gap:60px;align-items:center}.mobile-guide img{max-height:540px;width:100%;object-fit:cover;border-radius:28px}.mobile-guide h2{font-size:clamp(2rem,4vw,3.2rem);line-height:1.1}.mobile-guide p:not(.eyebrow){color:var(--muted)}.faq-list{max-width:900px}.faq-list details{border-top:1px solid var(--border)}.faq-list details:last-child{border-bottom:1px solid var(--border)}.faq-list summary{list-style:none;cursor:pointer;padding:20px 46px 20px 0;font-weight:900;position:relative}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary::after{content:"+";position:absolute;right:8px;top:17px;font-size:1.5rem;color:var(--brand)}.faq-list details[open] summary::after{content:"−"}.faq-list details div{padding:0 40px 20px 0;color:var(--muted)}.prose-grid{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--border);border:1px solid var(--border)}.prose-grid section{padding:30px;background:#fff}.prose-grid h2{margin-top:0}.prose-grid p{color:var(--muted)}.legal-prose{max-width:840px}.legal-prose h2{margin-top:32px;font-size:1.5rem}.legal-prose p{color:#4f4955}.legal-prose code{background:var(--soft);padding:2px 6px;border-radius:6px}.contact-cases{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}.contact-cases article{padding:26px;background:#fff;border:1px solid var(--border);border-radius:18px}.contact-cases h2{margin-top:0}.contact-cases p{color:var(--muted)}.search-form--page{max-width:720px;margin-top:24px}.search-results{min-height:280px}.empty-state{padding:40px;border:1px dashed #c9bfd4;border-radius:20px;background:#fff;max-width:760px}.empty-state h2{margin-top:0}.empty-state p{color:var(--muted)}.error-page{padding:90px 0}.error-page h1{font-size:clamp(2.5rem,6vw,5rem);line-height:1;margin:0 0 18px}.error-page>p:not(.eyebrow){font-size:1.1rem;color:var(--muted)}
.site-footer{background:var(--ink);color:#fff;padding-top:60px}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:40px;padding-bottom:44px}.brand--footer{margin-bottom:18px}.brand--footer strong{color:#fff}.footer-about p{color:#aaa2b2;max-width:420px;font-size:.9rem}.footer-grid h2{font-size:.9rem;margin:0 0 12px;color:var(--brand-soft)}.footer-grid>div:not(.footer-about){display:flex;flex-direction:column;align-items:flex-start}.footer-grid a:not(.brand){padding:5px 0;color:#c9c2cf;font-size:.9rem}.footer-grid a:hover{color:#fff}.footer-bottom{border-top:1px solid #38323f;padding:18px 0 22px;display:flex;align-items:center;justify-content:space-between;gap:20px}.footer-bottom p{margin:0;color:#938a9c;font-size:.8rem}.back-top{border-color:#484150;background:transparent;color:#d6cfdd}
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