:root{color-scheme:dark;--bg:#070a0e;--panel:#0d1219;--panel2:#101720;--line:#1e2a38;--line2:#293a4d;--text:#e6edf5;--muted:#76879a;--muted2:#536273;--blue:#76b9ff;--blue2:#4e91d2;--green:#78d8a9;--danger:#ff7373;--gold:#d7a85b;--shadow:0 18px 48px rgba(0,0,0,.28);font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,sans-serif}
*{box-sizing:border-box}body{margin:0;min-width:1180px;background:radial-gradient(circle at 18% -20%,rgba(71,112,153,.11),transparent 34%),linear-gradient(180deg,#080b10,#05070a 60%);color:var(--text);overflow:hidden}button,input,select{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.45}#sourceVideo{position:fixed;width:2px;height:2px;opacity:0;pointer-events:none;left:-20px;top:-20px}.app-shell{height:100vh;display:flex;flex-direction:column}.topbar{height:68px;flex:0 0 68px;display:flex;align-items:center;justify-content:space-between;padding:0 18px 0 22px;border-bottom:1px solid rgba(135,167,197,.12);background:rgba(7,10,14,.92);backdrop-filter:blur(18px);box-shadow:0 8px 30px rgba(0,0,0,.16);z-index:5}.brand{display:flex;align-items:center;gap:12px}.brand-icon{width:38px;height:38px;display:grid;place-items:center;border:1px solid #2b3c50;border-radius:11px;background:linear-gradient(145deg,#182432,#0d141d);color:#9ed1ff;font-size:18px;box-shadow:inset 0 1px rgba(255,255,255,.04)}.brand strong{display:block;font-size:17px;letter-spacing:.03em}.brand span{display:block;margin-top:3px;color:#607386;font-size:9px;letter-spacing:.12em}.top-actions{display:flex;align-items:center;gap:8px}.export-options{display:flex;border:1px solid #233244;border-radius:9px;overflow:hidden;background:#0b1118}.export-options select{border:0;border-right:1px solid #233244;border-radius:0}.export-options select:last-child{border-right:0}.btn,.icon-btn,select,input[type=text],input[type=number]{border:1px solid #263649;background:linear-gradient(180deg,#121b26,#0c131c);color:#cdd9e5;border-radius:9px;outline:none;transition:.15s}.btn{height:36px;padding:0 13px;font-weight:650;font-size:11px}.btn:hover:not(:disabled),.icon-btn:hover:not(:disabled){border-color:#3f5872;filter:brightness(1.08)}.btn.primary{border-color:#3c6e9f;background:linear-gradient(180deg,#316798,#28567f);color:#f5fbff;box-shadow:0 8px 20px rgba(28,85,135,.18)}.btn.export{min-width:154px;border-color:#4b7dad;background:linear-gradient(180deg,#417aaf,#326690);color:#fff}.btn.small{height:30px;padding:0 10px;border-radius:8px;font-size:10px}.btn.danger,.icon-btn.danger{border-color:rgba(255,107,107,.25);color:#ff8e8e;background:rgba(142,36,36,.12)}select{height:36px;padding:0 28px 0 10px;font-size:10px}.workspace{flex:1;min-height:0;display:grid;grid-template-columns:minmax(760px,1fr) 340px;gap:12px;padding:12px}.preview-column{min-width:0;display:grid;grid-template-rows:minmax(0,1fr) 176px;gap:12px}.preview-card,.timeline-card,.panel{border:1px solid rgba(130,164,197,.13);background:linear-gradient(160deg,rgba(15,22,31,.96),rgba(9,14,20,.98));border-radius:14px;box-shadow:var(--shadow)}.preview-card{min-height:0;display:flex;flex-direction:column;padding:12px}.preview-head{height:42px;display:flex;align-items:flex-start;justify-content:space-between;padding:0 4px}.preview-head b{display:block;max-width:600px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:12px}.preview-head span{display:block;margin-top:3px;color:#66798c;font-size:9px}.status-pill{display:flex;align-items:center;gap:6px;padding:6px 9px;border:1px solid rgba(104,199,160,.18);border-radius:999px;background:rgba(66,141,111,.07);color:#78caa7;font:700 8px/1 Inter,sans-serif;letter-spacing:.12em}.status-pill i{width:5px;height:5px;border-radius:50%;background:#79d7ad;box-shadow:0 0 8px rgba(121,215,173,.5)}.stage-wrap{position:relative;flex:1;min-height:0;display:grid;place-items:center;border:1px solid rgba(122,151,179,.09);border-radius:11px;overflow:hidden;background:radial-gradient(circle at 50% 45%,rgba(50,72,92,.1),transparent 48%),#030508}.stage-wrap:before{content:"";position:absolute;inset:0;pointer-events:none;background-image:linear-gradient(rgba(255,255,255,.018) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.018) 1px,transparent 1px);background-size:42px 42px;mask-image:linear-gradient(to bottom,transparent,black 16%,black 84%,transparent)}#previewCanvas{display:block;max-width:100%;max-height:100%;width:auto;height:auto;outline:none;box-shadow:0 16px 44px rgba(0,0,0,.38);background:#000}.empty-state{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:30px}.empty-state.hidden{display:none}.empty-mark{width:62px;height:62px;display:grid;place-items:center;margin-bottom:16px;border:1px solid #283a4d;border-radius:18px;background:linear-gradient(145deg,#162332,#0c131c);color:#88c7ff;font-size:24px;box-shadow:0 14px 32px rgba(0,0,0,.28)}.empty-state b{font-size:16px}.empty-state span{max-width:520px;margin:7px 0 17px;color:#65798d;font-size:10px;line-height:1.7}.transport{height:44px;display:grid;grid-template-columns:36px minmax(0,1fr) 140px auto;align-items:center;gap:9px;padding:8px 2px 0}.play-btn{width:34px;height:34px;border:1px solid #4f7fae;border-radius:10px;background:linear-gradient(180deg,#4c88bf,#346995);color:white}.transport input[type=range]{width:100%;accent-color:#78bfff}.transport>span{font:600 9px/1 Inter,sans-serif;color:#8295a8;text-align:right}.fit-select{display:flex;align-items:center;gap:5px;color:#62758a;font-size:9px}.fit-select select{height:30px}.timeline-card{padding:10px 12px;min-width:0}.timeline-toolbar{height:48px;display:flex;align-items:flex-start;justify-content:space-between;border-bottom:1px solid rgba(122,158,190,.09);padding:0 2px 8px}.timeline-toolbar>div:first-child{display:flex;align-items:baseline;gap:9px;flex-wrap:wrap}.timeline-toolbar b{font-size:10px;color:#d4e1ed}.timeline-toolbar span{font-size:9px;color:#75879b}.timeline-toolbar small{font-size:8px;color:#4d5c6b}.timeline-toolbar>div:last-child{display:flex;gap:6px}.timeline-scroll{position:relative;height:92px;overflow-x:auto;overflow-y:hidden;padding-top:10px;scrollbar-width:thin;scrollbar-color:#2c4258 transparent}.timeline-inner{position:relative;height:64px;min-width:100%;--label:58px}.track-label{position:absolute;left:0;top:0;width:54px;height:54px;display:grid;place-items:center;border:1px solid rgba(114,151,184,.11);border-radius:8px;background:#0a1017;color:#5c7690;font:700 8px/1 Inter,sans-serif;letter-spacing:.12em}.track-lane{position:absolute;left:58px;right:0;top:0;height:54px;border:1px solid rgba(115,158,195,.12);border-radius:8px;background:linear-gradient(180deg,#0c1721,#09121a);overflow:visible}.clip{position:absolute;top:4px;height:44px;min-width:22px;padding:6px 8px;border:1px solid rgba(92,165,216,.28);border-radius:7px;background:linear-gradient(135deg,rgba(45,102,144,.86),rgba(28,63,96,.92));box-shadow:inset 0 1px rgba(255,255,255,.05),0 5px 14px rgba(0,0,0,.18);overflow:hidden;cursor:pointer;user-select:none}.clip:hover{border-color:rgba(115,199,249,.55)}.clip.active{border-color:#80c9f3;box-shadow:0 0 0 1px rgba(75,165,220,.15),0 7px 18px rgba(0,0,0,.24)}.clip.dragging{opacity:.35}.clip.drop-target{outline:1px dashed #83d4ff;outline-offset:2px}.clip small,.clip b,.clip em{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.clip small{font:700 7px/1 Inter;color:#8ecdf1}.clip b{margin-top:4px;font-size:9px;color:#e7f4fc}.clip em{position:absolute;right:6px;bottom:5px;font:700 7px/1 Inter;font-style:normal;color:#9cc3da}.playhead{position:absolute;top:-4px;bottom:0;width:1px;background:#dcecff;pointer-events:none;z-index:8}.playhead i{position:absolute;left:-4px;top:-2px;width:9px;height:9px;border-radius:50%;background:#e7f5ff;box-shadow:0 0 12px rgba(137,207,255,.55)}.inspector{min-height:0;overflow-y:auto;padding-right:2px;display:flex;flex-direction:column;gap:10px;scrollbar-width:thin;scrollbar-color:#263a4f transparent}.panel{padding:13px}.panel-title{display:flex;align-items:flex-start;justify-content:space-between;gap:9px;margin-bottom:10px}.panel-title small{display:block;font:700 7px/1 Inter;color:#52687d;letter-spacing:.16em}.panel-title h2{margin:3px 0 0;font-size:12px}.mini-actions{display:flex;gap:5px}.icon-btn{width:29px;height:29px;border-radius:8px}.source-info{padding:10px;border:1px solid rgba(122,159,193,.09);border-radius:9px;background:#080d13}.source-info b,.source-info span{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.source-info b{font-size:10px}.source-info span{margin-top:5px;color:#607286;font-size:8px}.panel label{display:flex;flex-direction:column;gap:5px;margin-top:9px;color:#728497;font-size:9px}.panel label>b{align-self:flex-end;margin-top:-15px;color:#9bc7e5;font-size:8px}.panel input[type=text],.panel input[type=number],.panel select{width:100%;height:32px;padding:0 9px}.panel input[type=range]{width:100%;accent-color:#72b8e6}.grid2{display:grid;grid-template-columns:1fr 1fr;gap:8px}.hint{margin:8px 0 0;color:#5f7184;font-size:8px;line-height:1.55}.hint.strong{color:#7690aa}.panel-empty{padding:18px 10px;border:1px dashed rgba(122,159,193,.12);border-radius:9px;background:rgba(2,6,10,.25);color:#55687a;font-size:9px;text-align:center}.panel-empty.compact{padding:14px}.mask-tabs{display:flex;gap:5px;overflow-x:auto;padding-bottom:6px;scrollbar-width:thin}.mask-tab{flex:0 0 auto;height:31px;display:flex;align-items:center;gap:6px;padding:0 8px;border:1px solid rgba(127,163,195,.1);border-radius:8px;background:#0a1017;color:#66798c;font-size:8px}.mask-tab.active{border-color:rgba(91,180,232,.45);background:rgba(51,119,159,.13);color:#d4ecfa}.mask-tab i{font-style:normal;color:#68add3}.check{flex-direction:row!important;align-items:center!important}.check input{width:auto!important}.row-actions{display:flex;gap:6px;margin-top:10px}.format-badge{padding:5px 7px;border:1px solid rgba(92,168,215,.18);border-radius:999px;background:rgba(51,115,154,.07);color:#7fbee4;font:700 7px/1 Inter;letter-spacing:.08em}.export-progress-wrap{margin-top:11px}.export-progress{height:6px;border-radius:999px;background:#060a0e;overflow:hidden;border:1px solid #1a2835}.export-progress i{display:block;height:100%;width:0;background:linear-gradient(90deg,#4d95d0,#80c9fa)}.export-progress-meta{display:flex;justify-content:space-between;margin-top:6px;font-size:8px}.export-progress-meta b{color:#9bd3f4}.export-progress-meta span{color:#617487}.toast{position:fixed;left:50%;bottom:20px;transform:translate(-50%,16px);padding:10px 14px;border:1px solid rgba(132,178,211,.18);border-radius:10px;background:rgba(12,18,25,.94);box-shadow:0 14px 36px rgba(0,0,0,.35);color:#d8e7f2;font-size:10px;opacity:0;pointer-events:none;transition:.2s;z-index:20}.toast.show{opacity:1;transform:translate(-50%,0)}
@media(max-height:760px){.preview-column{grid-template-rows:minmax(0,1fr) 150px}.timeline-card{padding-top:8px}.timeline-toolbar{height:42px}.timeline-scroll{height:75px}.track-label,.track-lane{height:46px}.clip{height:36px}.panel{padding:11px}}

[hidden]{display:none!important}
.preview-column{grid-template-rows:minmax(0,1fr) 10px var(--timeline-height,220px);gap:0}
#layoutDivider{cursor:ns-resize;touch-action:none;display:grid;place-items:center}
#layoutDivider:after{content:"";width:64px;height:3px;background:#405a70;border-radius:8px}
#layoutDivider:hover:after,#layoutDivider:focus:after{background:#9bd7ff}
.timeline-card{display:flex;flex-direction:column;min-height:0}.timeline-scroll{flex:1;min-height:65px}
.playhead{pointer-events:auto;width:12px;margin-left:-6px;background:linear-gradient(90deg,transparent 5px,#dcecff 5px,#dcecff 7px,transparent 7px);cursor:ew-resize;touch-action:none}.playhead i{left:1px}
.zoom-tools{display:flex;align-items:center;gap:8px;padding:6px 0;color:#9cb0c5;font-size:10px}.zoom-tools>span:last-child{margin-left:auto;color:#839ab0}
.file-over{outline:2px dashed #8bd0ff;background:#153247}.exporting .workspace{opacity:.75}.exporting .top-actions>*:not(#exportBtn){pointer-events:none;opacity:.4}
button:focus-visible,select:focus-visible,input:focus-visible{outline:2px solid #86ccff;outline-offset:2px}
@media(max-width:1180px){body{min-width:760px}.workspace{grid-template-columns:minmax(400px,1fr) 300px}.brand span{display:none}.timeline-toolbar small{display:none}}

.timeline-inner{margin-top:22px}#timelineRuler{position:absolute;top:-22px;height:20px;left:0;right:0;border-bottom:1px solid #26394b}#timelineRuler span{position:absolute;font-size:9px;color:#9ab0c5;border-left:1px solid #456079;padding-left:4px;white-space:nowrap}.timeline-scroll{padding-top:12px}.timeline-toolbar small{color:#91a3b5}

/* Timeline gestures cover every row and the blank canvas. */
.preview-column{min-height:0;grid-template-rows:minmax(0,1fr) 10px var(--timeline-height,300px)}
.timeline-scroll{overflow-y:auto;touch-action:none;user-select:none;cursor:crosshair}
.track-lane{height:100%;border:0;background:none}.track-row{position:absolute;left:0;right:0;height:58px;border:1px solid #263644;background:#0b1520;border-radius:5px;color:#60768b;font-size:10px;padding:20px 12px;pointer-events:none}
.clip{height:50px;min-width:12px;cursor:grab;padding-left:12px;padding-right:12px;touch-action:none}.clip:active{cursor:grabbing}.clip b,.clip small,.clip em{pointer-events:none}
.track-label{height:58px;font-size:9px}.trim-handle{position:absolute;top:0;bottom:0;width:9px;background:#8acbff33;cursor:ew-resize;z-index:2}.trim-handle.left{left:0}.trim-handle.right{right:0}.trim-handle:hover{background:#b5e2ffa0}.trim-handle:after{content:'';position:absolute;top:16px;bottom:16px;left:4px;border-left:1px solid #d9f0ff}
#dropMarker{position:absolute;height:58px;width:3px;background:#ffd782;z-index:10;color:#ffd782;font-size:10px;white-space:nowrap;pointer-events:none}
.playhead{bottom:0;pointer-events:none}.playhead i{pointer-events:auto;cursor:ew-resize}
.export-progress-wrap{flex:none;margin:0;padding:10px 22px;background:#12283b;border-bottom:1px solid #477496;z-index:6}.export-progress{height:9px}.export-progress-meta{font-size:12px;line-height:20px}.export-progress-meta span{color:#b8cde1}.export-progress-meta b{color:#d8efff}
.stage-wrap:before{display:none}.timeline-toolbar,.zoom-tools{flex-shrink:0}

.timeline-option,.range-tools label{display:flex;align-items:center;gap:4px;white-space:nowrap;font-size:10px;color:#b6c9da}.timeline-option input,.range-tools input[type=checkbox]{accent-color:#82ceff}
.timeline-toolbar>div:last-child{align-items:center;flex-wrap:wrap;justify-content:flex-end}.timeline-toolbar{min-height:48px;height:auto}.range-tools{display:flex;align-items:center;gap:6px;padding:5px 0;flex:none;font-size:10px;color:#9eb5cb}.range-tools>input{width:72px;height:28px;background:#101f2d;border:1px solid #38516a;color:#d5e9fb;border-radius:5px;padding:4px}.range-tools #saveStatus{margin-left:auto;font-size:9px}.range-tools .btn{height:26px}
.preview-column{grid-template-rows:minmax(0,1fr) 10px var(--timeline-height,350px)}.track-row,.track-label{height:90px}.clip{height:86px;padding:4px 10px;isolation:isolate}.clip b{position:absolute;top:5px;left:12px;right:10px;margin:0;background:#06111ba8;padding:2px;z-index:2}.clip small{display:none}.clip em{bottom:2px;right:10px;z-index:2;background:#071320c9;padding:2px}.trim-handle{width:9px;z-index:4}
.clip-thumbs{position:absolute;left:0;right:0;top:0;height:48px;display:flex;overflow:hidden;pointer-events:none;background:#1d3448}.clip-thumbs img{height:48px;flex:none;width:85px;object-fit:cover;opacity:.8}.clip-wave{position:absolute;left:0;right:0;bottom:0;height:36px;width:100%;background:#0d2432;pointer-events:none}.wave-note{position:absolute;bottom:12px;left:12px;color:#9aafba;font-size:9px;pointer-events:none}.track-row{padding:34px 12px}
#rangeOverlay{position:absolute;top:-22px;bottom:0;pointer-events:none;background:#f0c3640e;border-left:2px solid #ffd17e;border-right:2px solid #ffd17e;z-index:3}#rangeOverlay:before{content:'I';position:absolute;top:0;left:2px;color:#ffd17e;font-size:10px}#rangeOverlay:after{content:'O';position:absolute;top:0;right:2px;color:#ffd17e;font-size:10px}#dropMarker{height:90px}
#restoreNotice{padding:8px;border:1px solid #81693d;border-radius:6px;margin-bottom:8px;font-size:11px;line-height:1.6;color:#efcc8e}#restoreNotice button{margin:5px 3px 0 0}

#downloadResult{display:inline-flex;align-items:center;text-decoration:none;margin-left:12px}.export-progress-meta{align-items:center;gap:12px}.export-progress-meta #exportEta{margin-left:auto}

.clip-menu{position:fixed;z-index:50;width:245px;padding:6px;background:#142333;border:1px solid #4a6a88;border-radius:8px;box-shadow:0 12px 32px #0009}.clip-menu button{display:block;width:100%;text-align:left;border:0;background:transparent;color:#dfedfa;padding:10px;border-radius:5px;font-size:12px}.clip-menu button:hover,.clip-menu button:focus{background:#2b4d6b}.clip-menu small{display:block;color:#91a8bb;padding:8px;font-size:10px}.playhead.snapped{filter:drop-shadow(0 0 4px #ffd37e)}.playhead.snapped i{background:#ffd37e}

.clip.compound{border-color:#b193ed;background:#453569}.clip.compound small{color:#e4d6ff}

#timelineMarquee{position:fixed;pointer-events:none;z-index:100;border:2px solid #74d6ff;background:rgba(76,171,255,.2);box-shadow:0 0 0 1px #06121b}
.clip.active{border:2px solid #a6e7ff!important;box-shadow:inset 0 0 0 2px #199bdf,0 0 0 2px #199bdf!important;background:#21537a!important}
.clip.active::after{content:'✓ 已选';position:absolute;right:10px;top:28px;z-index:5;background:#b6eaff;color:#052a40;border-radius:4px;padding:2px 5px;font-size:10px;font-weight:800;pointer-events:none}
.clip.compound b::before{content:'▣ 复合 · ';color:#e6ccff}