:root{--bg:#F7F4FF;--paper:#fff;--soft:#EEF2FF;--ink:#1B1340;--text:#2F2A4A;--muted:#5B5678;--light:#8B86A3;--purple:#7C3AED;--purple2:#A78BFA;--teal:#14B8A6;--coral:#F97316;--pink:#E11D48;--amber:#F59E0B;--indigo:#312E81;--line:rgba(124,58,237,.14);--shadow:0 16px 40px rgba(49,46,129,.10)}*{box-sizing:border-box}html{scroll-behavior:smooth;overflow-x:hidden}html.is-locked,html.is-locked body{overflow:hidden}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:1.8;overflow-x:hidden}a{color:inherit;text-decoration:none}img{display:block;max-width:100%;height:auto;object-fit:contain;object-position:center}button,input{font:inherit}.top-shell{position:fixed;inset:0 0 auto;z-index:60;padding:14px 18px;pointer-events:none}.desktop-dock,.mobile-bar{pointer-events:auto}.desktop-dock{height:68px;max-width:1120px;margin:auto;background:rgba(255,255,255,.92);backdrop-filter:blur(16px);border:1px 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@media(max-width:700px){.top-shell{padding:10px 12px}.wrap,.footer-inner{width:min(100% - 32px,1200px)}.section{padding:34px 0}.hero{padding-top:38px}.hero-grid{gap:26px}.hero-copy h1{font-size:40px}.media-shell{padding:12px;border-radius:22px}.folder{grid-template-columns:1fr}.folder em{justify-self:start}.big-index article{grid-template-columns:72px 1fr}.big-index .num{font-size:45px}.step,.step:nth-child(even){grid-template-columns:58px 1fr;margin-left:0;padding:18px}.category-index{grid-template-columns:1fr}.sheet-grid{grid-template-columns:1fr}.search-layer{top:0;left:0;width:100%;height:100dvh;transform:none!important;border-radius:0;padding:22px;overflow:auto}.search-layer.open{opacity:1}.page-head-grid{grid-template-columns:1fr}.footer-links{grid-template-columns:repeat(2,1fr)}.brick-wall{columns:1}.site-footer{margin-top:42px}.directory-sheet{padding:20px 16px}.wide-media{padding:10px}.phone-wrap{max-width:320px}}