:root{
  --brand:#6D28D9;--brand-soft:#A78BFA;--ink:#27242D;--muted:#716B78;--dark:#17151C;
  --bg:#F7F5FA;--bg-soft:#ECE8F2;--accent:#F59E0B;--white:#fff;--line:#d9d3e1;
  --shadow:0 16px 40px rgba(23,21,28,.08);--radius:18px;--shell:min(1180px,calc(100% - 40px));
}
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@media (max-width:600px){:root{--shell:calc(100% - 28px)}body{line-height:1.65}.header-inner{min-height:66px}.brand-lockup img{width:40px;height:40px}.brand-lockup strong{font-size:18px}.search-open{font-size:0;padding:9px;width:40px;height:40px}.search-open:after{content:'搜';font-size:13px}.home-hero{display:block;padding:28px 0 38px}.hero-media{margin-bottom:24px}.hero-media img{aspect-ratio:1.55/1;border-radius:18px}.hero-copy h1{font-size:36px}.hero-lead{font-size:16px}.hero-actions{display:grid}.btn{width:100%}.hero-facts{display:block}.hero-facts div+div{border-top:1px solid var(--line)}.section{padding:52px 0}.section-heading h2,.section-copy h2,.reading-path h2,.subdued-topic h2,.closing-grid h2{font-size:30px}.section-dark{padding:54px 0}.feature-row{grid-template-columns:34px 1fr;align-items:start}.feature-row img{grid-column:2;width:100%;height:auto;aspect-ratio:1.9/1}.feature-row h3{font-size:20px}.topic-columns{grid-template-columns:1fr}.free-note,.reading-path{gap:28px}.subdued-topic{padding:26px 20px;border-radius:20px}.closing-grid{grid-template-columns:1fr;gap:26px}.page-intro h1,.watch-intro h1,.dimension-intro h1,.article-header h1,.search-page-head h1,.error-page h1{font-size:36px}.fact-strip{grid-template-columns:1fr}.fact-strip div+div{border-top:1px solid var(--line)}.watch-card{grid-template-columns:1fr}.watch-card img{width:100%;height:auto;aspect-ratio:1.8/1}.article-stream article{grid-template-columns:34px 1fr}.stream-link{grid-column:2}.watch-boundary{align-items:flex-start;flex-direction:column}.article-body{font-size:17px}.article-body h2{font-size:27px}.search-row{flex-direction:column}.search-row button{width:100%}.footer-grid{grid-template-columns:1fr}.footer-bottom{flex-direction:column}.search-panel{padding:18px}.contact-options>div{grid-template-columns:1fr}.error-actions{display:grid}.error-actions .text-link{text-align:center;margin-top:4px}}
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.article-checklist{margin:18px 0 34px;padding:0;list-style:none}.article-checklist li{position:relative;padding:14px 0 14px 30px;border-top:1px solid var(--line);color:#403b45}.article-checklist li:last-child{border-bottom:1px solid var(--line)}.article-checklist li:before{content:'✓';position:absolute;left:2px;top:14px;color:var(--brand);font-weight:900}.compact-checklist li:before{content:'→'}