:root{--bg: #0d1117;--bg-2: #161b22;--bg-3: #1f2630;--border: #2d333d;--text: #e6edf3;--text-dim: #8b949e;--accent: #2f81f7;--accent-dim: #1f6feb;--green: #3fb950;--red: #f85149}*{box-sizing:border-box;margin:0;padding:0}html,body,#app{height:100%}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;font-size:14px}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}::-webkit-scrollbar-track{background:transparent}button{background:var(--bg-3);color:var(--text);border:1px solid var(--border);border-radius:6px;padding:6px 12px;cursor:pointer;font-size:13px;transition:all .15s}button:hover{background:var(--accent-dim);border-color:var(--accent)}button:disabled{opacity:.5;cursor:not-allowed}input,select,textarea{background:var(--bg);color:var(--text);border:1px solid var(--border);border-radius:6px;padding:8px 10px;font-size:13px;outline:none;width:100%}input:focus,select:focus,textarea:focus{border-color:var(--accent)}.app{display:flex;flex-direction:column;height:100%}.topbar{display:flex;align-items:center;gap:16px;padding:10px 16px;background:var(--bg-2);border-bottom:1px solid var(--border)}.topbar .logo{font-size:17px;font-weight:700;color:var(--accent)}.topbar nav{display:flex;gap:8px}.topbar nav a{color:var(--text-dim);text-decoration:none;padding:6px 12px;border-radius:6px;font-weight:500}.topbar nav a.active,.topbar nav a:hover{color:var(--text);background:var(--bg-3)}.topbar .spacer{flex:1}.menu-btn{background:none;border:none;color:var(--text-dim);font-size:18px;padding:4px 8px;border-radius:6px;cursor:pointer}.menu-btn:hover{color:var(--text);background:var(--bg-3)}.main{flex:1;display:flex;min-height:0}.sidebar{width:220px;background:var(--bg-2);border-right:1px solid var(--border);overflow-y:auto;flex-shrink:0;padding:8px;transition:width .2s,padding .2s,transform .25s}.sidebar.collapsed{width:0;padding:0;border-right:none;overflow:hidden}.sidebar-tab{position:fixed;left:0;top:50%;transform:translateY(-50%);z-index:50;border-radius:0 8px 8px 0;border-left:none;padding:12px 7px;background:var(--bg-2);box-shadow:2px 0 10px #0006}.sidebar-tab:hover{background:var(--accent-dim);border-color:var(--accent)}.sidebar-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:140;background:#00000080}.sidebar .section-title{font-size:11px;color:var(--text-dim);padding:10px 8px 4px;letter-spacing:.5px}.sidebar .item{display:flex;align-items:center;gap:8px;padding:7px 8px;border-radius:6px;cursor:pointer;color:var(--text-dim);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sidebar .item:hover{background:var(--bg-3);color:var(--text)}.sidebar .item.active{background:var(--accent-dim);color:#fff}.sidebar .item .count{margin-left:auto;font-size:11px;color:var(--text-dim);background:var(--bg-3);padding:1px 7px;border-radius:10px}.sidebar .item.active .count{color:#fff;background:#ffffff26}.content{flex:1;overflow-y:auto;padding:16px;min-width:0}.channel-toolbar{display:flex;gap:10px;margin-bottom:14px}.channel-toolbar .search{max-width:320px}.channel-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}.channel-card{background:var(--bg-2);border:1px solid var(--border);border-radius:8px;padding:10px;cursor:pointer;transition:all .15s;position:relative;display:flex;flex-direction:column;align-items:center;gap:8px}.channel-card:hover{border-color:var(--accent);transform:translateY(-2px)}.channel-card .thumb{width:100%;aspect-ratio:16/9;background:var(--bg-3);border-radius:6px;display:flex;align-items:center;justify-content:center;overflow:hidden}.channel-card .thumb img{width:100%;height:100%;object-fit:cover}.channel-card .thumb .fallback{font-size:24px;font-weight:700;color:var(--text-dim)}.channel-card .name{font-size:13px;text-align:center;width:100%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.channel-card .star{position:absolute;top:6px;right:6px;width:24px;height:24px;display:flex;align-items:center;justify-content:center;border-radius:50%;background:#00000073;border:none;font-size:14px;color:var(--text-dim);z-index:2}.channel-card .star.on{color:#e3b341}.channel-card .star:hover{background:#000000b3}.player-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:200;background:#000000b8;display:flex;align-items:center;justify-content:center;animation:fadein .18s}.player-window{width:min(1000px,92vw);max-height:90vh;background:var(--bg-2);border:1px solid var(--border);border-radius:12px;overflow:hidden;display:flex;flex-direction:column;box-shadow:0 16px 48px #0009}.player-head{display:flex;align-items:center;gap:12px;padding:10px 14px;border-bottom:1px solid var(--border);background:var(--bg-3)}.player-head .p-name{font-size:15px;font-weight:600}.player-head .p-group{color:var(--text-dim);font-size:12px}.player-head .status{color:var(--text-dim);font-size:12px;margin-left:auto}.player-head .close-btn{background:none;border:none;font-size:16px;color:var(--text-dim);padding:4px 8px}.player-head .close-btn:hover{color:var(--red)}.player-body{display:flex;flex:1;min-height:0}.player-body video{flex:1;min-width:0;background:#000;max-height:calc(90vh - 45px)}.player-info{width:220px;padding:12px;display:flex;flex-direction:column;background:var(--bg-2);border-left:1px solid var(--border);overflow-y:auto}.player-info .p-btn-row{display:flex;flex-direction:column;gap:8px}.empty{text-align:center;color:var(--text-dim);padding:60px 20px}.import-wrap{max-width:760px;margin:0 auto}.import-tabs{display:flex;gap:8px;margin-bottom:16px}.import-tabs button.active{background:var(--accent-dim);border-color:var(--accent)}.import-form{display:flex;flex-direction:column;gap:12px}.drop-zone{border:2px dashed var(--border);border-radius:8px;padding:40px;text-align:center;color:var(--text-dim);cursor:pointer;transition:all .15s}.drop-zone:hover,.drop-zone.drag{border-color:var(--accent);color:var(--text);background:#2f81f70d}.source-list{margin-top:24px}.source-list .src-item{display:flex;align-items:center;gap:12px;padding:10px 12px;background:var(--bg-2);border:1px solid var(--border);border-radius:8px;margin-bottom:8px}.src-item .src-name{font-weight:600;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.src-item .src-meta{color:var(--text-dim);font-size:12px}.group-list{max-width:760px;margin:0 auto}.group-item{background:var(--bg-2);border:1px solid var(--border);border-radius:8px;margin-bottom:10px;overflow:hidden}.group-item .group-head{display:flex;align-items:center;gap:10px;padding:10px 14px;cursor:pointer}.group-item .group-head:hover{background:var(--bg-3)}.group-item .g-count{color:var(--text-dim);font-size:12px}.group-item .g-body{padding:10px 14px;border-top:1px solid var(--border);display:flex;flex-wrap:wrap;gap:8px}.group-item .g-body .chip{display:flex;align-items:center;gap:6px;background:var(--bg-3);border-radius:6px;padding:4px 10px;font-size:12px}.group-item .g-body .chip button{padding:0 4px;background:none;border:none;color:var(--text-dim);font-size:12px}.toast{position:fixed;top:16px;left:50%;transform:translate(-50%);background:var(--bg-3);border:1px solid var(--border);padding:10px 18px;border-radius:8px;z-index:999;box-shadow:0 4px 16px #0006;animation:fadein .2s}@keyframes fadein{0%{opacity:0;transform:translate(-50%,-8px)}to{opacity:1;transform:translate(-50%)}}.loading{text-align:center;color:var(--text-dim);padding:40px}@media(max-width:768px){.topbar{gap:8px;padding:8px 10px}.topbar .logo{font-size:15px}.topbar nav{flex-wrap:wrap;gap:4px}.topbar nav a{padding:6px 8px}.count-hint{display:none}.sidebar{position:fixed;top:0;bottom:0;left:0;width:260px;z-index:150;padding:8px;transform:translate(-100%);border-right:1px solid var(--border);box-shadow:2px 0 16px #0006}.sidebar.open{transform:translate(0)}.content{padding:10px}.channel-toolbar .search{max-width:none;flex:1}.channel-grid{grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:8px}.import-wrap,.group-list{max-width:none}.src-item{flex-wrap:wrap}.src-item .src-name{flex-basis:100%}.group-item .group-head{flex-wrap:wrap}.group-item .group-head .g-count{flex-basis:100%}.player-overlay{align-items:flex-end}.player-window{width:100vw;height:100dvh;max-height:none;border-radius:12px 12px 0 0}.player-body{flex-direction:column}.player-body video{max-height:none;flex:1}.player-info{width:100%;border-left:none;border-top:1px solid var(--border);padding:8px 12px}.player-info .p-btn-row{flex-direction:row;justify-content:center;gap:10px}}@media(max-width:768px)and (orientation:landscape){.player-window{border-radius:0}.player-head{padding:6px 12px}.player-head .p-name{font-size:13px}}