:root{--bg:#F5F3EE;--card:#fff;--soft:#EEF1F4;--title:#20262F;--text:#3E4752;--muted:#707986;--deep:#253544;--accent:#A85E4D;--sand:#E7DFD2;--line:#DDD9D1;--footer:#202934;--pad:32px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.78 system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;overflow-x:hidden}body.locked{overflow:hidden}a{color:inherit;text-decoration:none}a:hover{text-decoration:underline;text-underline-offset:4px}button,input{font:inherit}.shell{width:min(1180px,calc(100% - var(--pad)*2));margin:auto}.site-header{background:rgba(245,243,238,.98);border-bottom:1px solid var(--line)}.brandbar{min-height:68px;display:grid;grid-template-columns:minmax(180px,1fr) minmax(280px,1.4fr) 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@media(max-width:560px){:root{--pad:16px}.brandbar{grid-template-columns:1fr auto;gap:10px}.brand-text small{display:none}.brand-actions{gap:6px}.brand-actions .icon-btn{padding:0 10px}.section{padding:34px 0}.home-hero{padding:36px 0}.home-hero h1,.page-hero h1{font-size:28px}.lead{font-size:16px}.hero-grid .media-frame img{max-height:210px}.mini-stack .media-frame img,.band .media-frame img,.city-grid .media-frame img,.notebook-grid .media-frame img{max-height:180px}.topics-list{grid-template-columns:1fr}.topic-index{grid-template-columns:1fr 1fr}.footer-top{display:block}.footer-top p{margin-top:10px}.footer-grid{grid-template-columns:1fr}.search-panel{top:70px}.article section{padding-bottom:24px;margin-bottom:24px}.mobile-feature .app img{max-width:180px;max-height:300px}}
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