:root{--paper:#f8f6f0;--surface:#fffefa;--blue:#e3eff7;--line:#dbe5eb;--ink:#263e50;--muted:#5c7281;--accent:#326d98;--radius:18px}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.65 "Segoe UI","Microsoft YaHei",sans-serif}button,input{font:inherit}button,a,input{outline-offset:4px}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid var(--accent)}button{cursor:pointer;min-height:44px;border:1px solid var(--line);background:var(--surface);border-radius:11px;padding:9px 15px;color:var(--ink)}button:disabled{cursor:default;opacity:.55}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.layout{display:grid;grid-template-columns:248px minmax(0,1fr);max-width:1800px;margin:auto}.sidebar{position:sticky;top:0;height:100vh;border-right:1px solid var(--line);padding:32px 22px;overflow-y:auto}.brand{display:flex;gap:12px;align-items:center;font-size:20px;font-weight:650;color:var(--ink)}.brand svg{width:38px;height:38px;fill:none;stroke:var(--accent);stroke-width:1.5}.brand small{display:block;font-size:12px;color:var(--muted);font-weight:400;letter-spacing:1px}.back{display:block;margin:26px 0 34px;font-size:14px}.sidebar-label{font-size:12px;letter-spacing:1px;color:var(--muted);margin:0 12px 12px}nav{display:grid;gap:5px}nav button{display:flex;justify-content:space-between;text-align:left;border-color:transparent;background:transparent;gap:8px}nav button.active{background:var(--blue);color:var(--accent)}nav button span:last-child{color:var(--muted);font-size:12px}.sidebar-note{margin:35px 12px;font-size:13px;color:var(--muted);line-height:1.9}main{min-width:0;padding:0 46px 28px}.topbar{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid 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9px;font-size:11px;border-radius:7px;color:var(--ink)}.video-cover{display:flex;flex-direction:column;justify-content:center;align-items:center;gap:20px;background:var(--blue);color:var(--accent);padding:24px}.play{display:grid;place-items:center;width:62px;height:62px;border:1px solid #b8d1e4;border-radius:50%;font-size:26px}.video-cover strong{font-weight:500;font-size:20px}.meta{padding:16px 17px}.meta small{color:var(--accent);font-size:12px}.meta h3{font-size:15px;font-weight:550;margin:7px 0 9px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;overflow-wrap:anywhere;min-height:45px}.credit{font-size:11px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.card-bottom{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-top:12px}.card-bottom a{font-size:12px}.favorite{font-size:13px;min-width:82px;padding:5px 10px}.more{display:block;min-width:170px;margin:32px auto}.empty{text-align:center;border:1px dashed var(--line);padding:50px 18px;border-radius:var(--radius);color:var(--muted)}[hidden]{display:none!important}footer{color:var(--muted);font-size:12px;line-height:1.8;padding-top:28px}#status{color:var(--accent)}dialog{border:1px solid var(--line);border-radius:20px;padding:0;width:min(1100px,94vw);max-height:92vh;max-height:92svh;background:var(--surface);color:var(--ink);overflow:hidden}dialog[open]{display:flex;flex-direction:column}dialog::backdrop{background:rgba(29,43,53,.65)}.viewer-head{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:18px 22px;border-bottom:1px solid var(--line);flex-shrink:0}.viewer-head h2{font-size:17px;max-width:880px;overflow-wrap:anywhere}.viewer-head small{color:var(--accent);font-size:12px}#close{min-width:46px;font-size:28px;padding:0 8px;flex-shrink:0}.viewer-body{overflow:auto;min-height:0;background:#edf1f2;text-align:center}.viewer-body img{display:block;max-width:100%;height:auto;max-height:70vh;object-fit:contain;margin:auto}.viewer-body iframe{display:block;width:100%;aspect-ratio:16/9;border:0;background:#162631}.viewer-footer{padding:12px 22px 18px;flex-shrink:0}.viewer-footer p{margin:0 0 6px;overflow-wrap:anywhere}.viewer-footer a{font-size:13px}@media(min-width:1550px){.grid{grid-template-columns:repeat(4,minmax(0,1fr))}}@media(max-width:1100px){.layout{grid-template-columns:220px minmax(0,1fr)}main{padding:0 28px 24px}.grid{grid-template-columns:repeat(2,minmax(0,1fr))}.intro{gap:20px}.stats{gap:16px}.stats dd{font-size:28px}}@media(max-width:720px){.layout{display:block}.sidebar{position:static;width:auto;height:auto;padding:20px 20px 15px;border-right:0;border-bottom:1px solid var(--line);overflow:visible}.brand{font-size:19px}.back{margin:15px 0;font-size:13px}.sidebar-label,.sidebar-note{display:none}nav{display:flex;overflow-x:auto;gap:6px;padding-bottom:5px}nav button{flex:0 0 auto;white-space:nowrap;background:var(--surface);border:1px solid var(--line);font-size:13px;padding:8px 12px}main{padding:0 20px 20px}.topbar{height:62px}.intro{display:block;padding:32px 0}.eyebrow{margin-bottom:14px}h1{font-size:40px}.lead{font-size:14px}.stats{margin-top:26px;gap:35px}.stats dd{font-size:28px}.section-head{display:block}.search{width:100%;max-width:none;margin-top:16px}.tools{align-items:flex-start;flex-wrap:wrap;margin-top:16px}.tools button{font-size:12px;padding:8px 11px}.grid{gap:12px}.meta{padding:12px}.meta h3{font-size:13px;min-height:40px}.card-bottom{display:block}.favorite{width:100%;margin-top:8px}.credit{font-size:10px}.badge{font-size:10px;top:8px;left:8px;padding:3px 7px}.video-cover{padding:12px}.video-cover strong{font-size:15px}.play{width:46px;height:46px;font-size:20px}.viewer-head{padding:12px 14px;gap:10px}.viewer-head h2{font-size:14px}.viewer-footer{padding:10px 14px 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@media(max-width:720px){.intro{padding:22px 0}.intro .eyebrow,.intro .lead{display:none}.intro h1{font-size:30px;line-height:1.2;letter-spacing:-.5px;margin:0 0 16px}.intro .stats{margin-top:0;gap:30px}.intro .stats dd{font-size:25px}}