*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto;background:#fff;color:#111827}
.topbar{position:sticky;top:0;z-index:20;height:64px;display:flex;align-items:center;justify-content:space-between;padding:0 16px;background:#fff;border-bottom:1px solid #e5e7eb}
.top-left,.top-right{display:flex;align-items:center;gap:10px}.logo{width:28px;height:28px;border-radius:8px;background:#4f46e5;color:#fff;display:grid;place-items:center;font-size:13px}.brand{font-weight:700}
.search-wrap{display:flex;align-items:center;max-width:720px;width:56%}.search-wrap input{flex:1}
.icon-btn{background:#f3f4f6;border:1px solid #e5e7eb;color:#374151;border-radius:999px;padding:9px 12px;cursor:pointer}
.avatar{width:34px;height:34px;border-radius:999px;border:1px solid #c7d2fe;background:#eef2ff;color:#4338ca;font-weight:700}
input{background:#fff;border:1px solid #d1d5db;color:#111827;border-radius:999px;padding:10px 14px}
.layout{display:grid;grid-template-columns:240px 1fr;min-height:calc(100vh - 64px)}
.sidebar{border-right:1px solid #e5e7eb;padding:12px 10px;background:#fff;overflow:auto}
.nav-list{display:flex;flex-direction:column;gap:6px}
.nav-item{all:unset;display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;color:#374151;cursor:pointer}
.nav-item.active,.nav-item:hover{background:#eef2ff;color:#1f2937}
.main{padding:18px 18px 28px;overflow:auto;background:#fafafa}
.status-banner{margin:0 0 14px;padding:10px 12px;border-radius:12px;font-size:13px;border:1px solid #dbeafe;background:#eff6ff;color:#1d4ed8}.status-banner.success{background:#ecfdf5;border-color:#bbf7d0;color:#166534}.status-banner.warn{background:#fffbeb;border-color:#fde68a;color:#92400e}.status-banner.error{background:#fef2f2;border-color:#fecaca;color:#b91c1c}
.pills{display:flex;gap:10px;overflow:auto;padding-bottom:8px;margin-bottom:14px}
.pill{all:unset;white-space:nowrap;padding:7px 12px;border-radius:9px;background:#e5e7eb;color:#374151;font-size:13px;cursor:pointer}.pill.active{background:#111827;color:#fff}
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px 14px}
.card{text-decoration:none;color:inherit}
.thumb-wrap{position:relative;aspect-ratio:16/9;border-radius:12px;overflow:hidden;background:#000}
.thumb-frame{width:100%;height:100%;display:flex;align-items:center;justify-content:center;background:#000}
.thumb{width:100%;height:100%;object-fit:contain;display:block;background:#000}.thumb.empty{background:linear-gradient(135deg,#dbeafe,#e5e7eb);width:100%;height:100%}
.dur{position:absolute;right:8px;bottom:8px;background:rgba(17,24,39,.88);color:#fff;font-size:12px;padding:2px 6px;border-radius:6px}
.meta{display:flex;gap:10px;margin-top:10px}.meta-copy{flex:1}.ch-avatar{width:36px;height:36px;border-radius:999px;background:#e0e7ff;display:grid;place-items:center;font-size:12px;color:#4338ca;flex-shrink:0}
.title{font-size:15px;font-weight:600;line-height:1.35;color:#111827}.sub{font-size:12px;color:#6b7280;margin-top:4px}
.summary{position:fixed;left:0;top:0;max-width:320px;background:#fff;border:1px solid #d1d5db;border-radius:12px;padding:10px 12px;pointer-events:none;z-index:50;box-shadow:0 10px 24px rgba(0,0,0,.12)}
.empty-state{padding:20px;color:#6b7280;background:#fff;border:1px dashed #d1d5db;border-radius:12px}
.skeleton-card{pointer-events:none}.skeleton-block,.skeleton-line,.skeleton-circle{position:relative;overflow:hidden;background:#e5e7eb}.skeleton-block::after,.skeleton-line::after,.skeleton-circle::after{content:'';position:absolute;inset:0;transform:translateX(-100%);background:linear-gradient(90deg,transparent,rgba(255,255,255,.7),transparent);animation:shimmer 1.2s infinite}.skeleton-circle{width:36px;height:36px;border-radius:999px}.skeleton-line{height:12px;border-radius:999px;margin-top:8px}.skeleton-line.lg{width:88%}.skeleton-line.md{width:54%}
.hidden{display:none}
@keyframes shimmer{100%{transform:translateX(100%)}}
@media(max-width:980px){.layout{grid-template-columns:1fr}.sidebar{position:fixed;left:0;top:64px;bottom:0;width:240px;transform:translateX(-100%);transition:.2s}.sidebar.open{transform:translateX(0)}.search-wrap{width:62%}}