:root{--bg:#F7F4FF;--paper:#fff;--soft:#EEF2FF;--ink:#1B1340;--text:#2F2A4A;--muted:#5B5678;--faint:#8B86A3;--purple:#7C3AED;--purple2:#A78BFA;--teal:#14B8A6;--coral:#F97316;--pink:#E11D48;--amber:#F59E0B;--indigo:#312E81;--border:rgba(124,58,237,.14);--shadow:0 16px 40px rgba(49,46,129,.10);--r:24px;--max:1200px}
*{box-sizing:border-box}html{scroll-behavior:smooth;overflow-x:hidden}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;line-height:1.75;overflow-x:hidden}a{color:inherit;text-decoration:none}img{display:block;max-width:100%;height:auto}button{font:inherit}.skip-link{position:fixed;left:16px;top:-80px;z-index:9999;background:var(--ink);color:#fff;padding:10px 16px;border-radius:99px}.skip-link:focus{top:12px}.site-header{position:fixed;inset:0 0 auto;z-index:100;padding:12px 16px;pointer-events:none}.brand-bar{height:64px;max-width:1080px;margin:auto;background:rgba(255,255,255,.92);backdrop-filter:blur(16px);border:1px solid var(--border);box-shadow:var(--shadow);border-radius:999px;display:grid;grid-template-columns:44px 1fr 118px 1fr 44px;align-items:center;gap:10px;padding:8px;pointer-events:auto}.brand-mark{height:46px;display:grid;place-items:center;min-width:0}.brand-mark 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@media(max-width:980px){.pill-nav a{padding:8px 6px;font-size:13px}.brand-bar{grid-template-columns:44px 1fr 92px 1fr 44px}.tag-track,.grid-4{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:760px){.site-header{padding:8px 12px}.brand-bar{height:56px;grid-template-columns:44px 1fr 62px;max-width:none;border-radius:20px;padding:6px}.pill-nav,.search-trigger{display:none}.brand-mark{grid-column:2;height:42px}.drawer-trigger{grid-column:1;grid-row:1}.mobile-app-link{display:flex;grid-column:3;grid-row:1;align-items:center;justify-content:center;min-height:42px;border-radius:99px;background:linear-gradient(135deg,var(--purple2),var(--purple));color:#fff;font-weight:800;font-size:14px}.site-main{padding-top:82px}.hero,.page-hero{padding:34px 0 24px}.hero-grid,.split,.pulse-layout,.duo,.grid-2,.mosaic{grid-template-columns:1fr}.mosaic{grid-template-rows:auto}.mosaic article:first-child{grid-row:auto}.mosaic article:first-child .media-card{min-height:280px}.tag-track,.grid-3,.grid-4{grid-template-columns:1fr}.num-list{position:static;grid-template-columns:repeat(2,1fr)}.wall{columns:1}.folder{grid-template-columns:54px 1fr}.folder>a{grid-column:2}.rank-card{grid-template-columns:72px 1fr}.rank-number{font-size:46px}.footer-grid{grid-template-columns:repeat(2,1fr)}.drawer-groups{grid-template-columns:1fr}.site-drawer{max-height:78vh}.search-layer{inset:0;width:100%;transform:none;background:var(--bg);padding:14px;overflow:auto}.search-layer.is-open{transform:none}.search-card{min-height:100%;border-radius:24px}.mobile-dock{position:fixed;z-index:120;left:14px;right:14px;bottom:calc(10px + env(safe-area-inset-bottom));height:52px;border-radius:22px;background:rgba(255,255,255,.94);backdrop-filter:blur(16px);border:1px solid var(--border);box-shadow:0 14px 40px rgba(49,46,129,.18);display:grid;grid-template-columns:repeat(5,1fr);padding:4px}.mobile-dock a{font-size:11px;color:var(--muted);display:flex;flex-direction:column;gap:2px;align-items:center;justify-content:center;border-radius:17px}.mobile-dock a span{width:5px;height:5px;border-radius:50%;background:transparent}.mobile-dock a.is-active{color:var(--purple);font-weight:800}.mobile-dock a.is-active span{background:var(--purple)}.site-footer{padding-bottom:100px}.section{padding:44px 0}.step-card{grid-template-columns:56px 1fr}.page-hero h1,h1{font-size:clamp(36px,11vw,54px)}}
@media(max-width:440px){.container,.footer-inner{width:min(calc(100% - 32px),var(--max))}.footer-grid{grid-template-columns:1fr}.num-list{grid-template-columns:1fr}.rank-card{grid-template-columns:58px 1fr}.rank-number{font-size:40px}}