:root{--ink:#171a1f;--muted:#646b75;--line:#dfe3e8;--surface:#ffffff;--surface-subtle:#f5f6f7;--accent:#0f766e;--accent-soft:#e5f4f1;--warm:#b45309;--warm-soft:#fff3df;--focus:#2563eb}*{box-sizing:border-box}body,html{background:var(--surface-subtle)}body{margin:0;color:var(--ink);font-family:var(--font-sans),"Microsoft YaHei",sans-serif;letter-spacing:0}button,input{font:inherit}a,button{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid color-mix(in srgb,var(--focus) 30%,transparent);outline-offset:2px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}main{width:min(1440px,100%);min-height:100vh;margin:0 auto;background:var(--surface);border-inline:1px solid var(--line)}.site-header{min-height:72px;padding:14px clamp(20px,4vw,56px);justify-content:space-between;gap:20px;border-bottom:1px solid var(--line)}.brand-lockup,.site-header{display:flex;align-items:center}.brand-lockup{gap:12px}.brand-mark{width:40px;height:40px;display:grid;place-items:center;color:#fff;background:var(--ink);border-radius:6px}.brand-caption,.brand-name{margin:0}.brand-name{font-size:17px;font-weight:700}.brand-caption{margin-top:2px;color:var(--muted);font-size:12px}.header-status{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:13px}.source-dot{width:8px;height:8px;border-radius:50%;background:var(--warm)}.source-dot.feishu{background:var(--accent)}.directory-intro{padding:clamp(40px,7vw,88px) clamp(20px,6vw,88px) 40px;display:grid;grid-template-columns:minmax(0,1fr) minmax(320px,520px);align-items:end;grid-gap:clamp(32px,7vw,96px);gap:clamp(32px,7vw,96px);border-bottom:1px solid var(--line)}.eyebrow{margin:0 0 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var(--line)}.resource-image{object-fit:contain}.resource-placeholder{width:100%;height:100%;display:grid;place-items:center;color:var(--muted);background:repeating-linear-gradient(45deg,#f1f2f3,#f1f2f3 12px,#e8eaec 0,#e8eaec 24px)}.resource-category{position:absolute;left:10px;bottom:10px;max-width:calc(100% - 20px);padding:4px 8px;overflow:hidden;color:#fff;background:color-mix(in srgb,var(--ink) 88%,transparent);border-radius:4px;font-size:12px;text-overflow:ellipsis;white-space:nowrap}.resource-content{min-height:240px;padding:16px;display:flex;flex:1 1;flex-direction:column}.resource-content h3{margin:0;font-size:17px;line-height:1.45}.resource-content p{display:-webkit-box;margin:9px 0 0;overflow:hidden;color:var(--muted);font-size:13px;line-height:1.7;-webkit-box-orient:vertical;-webkit-line-clamp:3}.tag-list{min-height:28px;margin:14px 0 0;padding:0;display:flex;flex-wrap:wrap;gap:6px;list-style:none}.tag-list li{padding:3px 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var(--line);font-size:12px}.site-footer p{margin:0}.service-unavailable{display:grid;place-items:center;min-height:100vh;padding:24px;text-align:center}.service-unavailable h1{margin:0;font-size:28px}.service-unavailable p{margin:10px 0 0;color:var(--muted)}@media (max-width:1100px){h1{font-size:52px}.resource-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}@media (max-width:820px){.directory-intro{grid-template-columns:1fr;align-items:start}.resource-grid{grid-template-columns:repeat(2,minmax(0,1fr))}h1{font-size:46px}}@media (max-width:560px){main{border-inline:0}.site-header{min-height:64px}.header-status{font-size:0}.directory-intro{padding-top:36px}h1{font-size:40px}.resource-controls{position:relative}.section-tabs{min-height:0;flex-wrap:wrap;overflow-x:visible}.resource-grid{grid-template-columns:1fr}.resource-content{min-height:220px}.site-footer{align-items:flex-start;flex-direction:column;gap:6px}}@media 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