:root{--bg: #f6f7fb;--panel: #ffffff;--line: #e8eaf1;--line-soft: #f0f1f6;--text: #1b1d29;--text-2: #4a4f63;--muted: #8b90a4;--accent: #6c5ce7;--accent-hover: #5b4bd6;--accent-soft: #f0eeff;--accent-border: #d9d4fb;--ok: #2fb87a;--warn: #d9962a;--err: #d8524d;--wave: #d6f3e4;--wave-line: #4fc38d;--radius: 12px;--radius-lg: 16px;--shadow-sm: 0 1px 2px rgba(20, 22, 40, .05);--shadow-md: 0 4px 14px rgba(20, 22, 40, .08)}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-size:14px;line-height:1.45;-webkit-font-smoothing:antialiased}button{font:inherit;color:inherit;cursor:pointer}input,textarea,select{font:inherit;color:inherit}.shell{display:flex;flex-direction:column;min-height:100vh}.topbar{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:24px;height:72px;padding:0 26px;background:var(--panel);border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:26px;min-width:0}.brand-name{display:flex;align-items:center;gap:9px;font-size:17px;font-weight:700;letter-spacing:-.01em}.brand-name .mark{color:var(--accent);display:flex}.project-pick{display:flex;align-items:center;gap:7px;padding:7px 10px;border:0;border-radius:9px;background:transparent;color:var(--text);font-size:14.5px;font-weight:500;max-width:260px}.project-pick:hover{background:var(--line-soft)}.project-pick .chev{color:var(--muted);flex-shrink:0}.project-pick span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.nav{display:flex;align-items:center;gap:8px}.nav button{position:relative;padding:24px 14px;border:0;background:none;color:var(--muted);font-size:14.5px;font-weight:500}.nav button:hover{color:var(--text-2)}.nav button.active{color:var(--accent);font-weight:600}.nav button.active:after{content:"";position:absolute;left:6px;right:6px;bottom:-1px;height:2px;border-radius:2px 2px 0 0;background:var(--accent)}.topbar-right{display:flex;align-items:center;justify-content:flex-end;gap:12px}.icon-btn{display:grid;place-items:center;width:36px;height:36px;border:1px solid var(--line);border-radius:50%;background:var(--panel);color:var(--muted)}.icon-btn:hover{color:var(--text-2);border-color:#d9dce6}.balance{display:flex;align-items:center;gap:7px;padding:7px 13px;border:1px solid var(--accent-border);border-radius:999px;background:var(--accent-soft);color:var(--accent);font-size:13.5px;font-weight:600;font-variant-numeric:tabular-nums}.balance:hover{background:#e9e5ff}.balance.low{border-color:#f0cfa8;background:#fdf4e7;color:#a9701a}.cost-hint{display:flex;align-items:center;justify-content:center;gap:6px;margin-top:9px;font-size:12.5px;color:var(--muted)}.avatar-btn{display:grid;place-items:center;width:36px;height:36px;border:0;border-radius:50%;background:#2b2f42;color:#fff}.workspace{display:flex;flex:1;min-height:0}.rail{width:104px;flex-shrink:0;padding:14px 10px;background:var(--panel);border-right:1px solid var(--line);display:flex;flex-direction:column;gap:4px}.rail button{display:flex;flex-direction:column;align-items:center;gap:7px;padding:13px 6px;border:0;border-radius:var(--radius);background:none;color:var(--muted);font-size:12px;font-weight:500}.rail button:hover{background:var(--line-soft);color:var(--text-2)}.rail button.active{background:var(--accent-soft);color:var(--accent);font-weight:600}.editor{flex:1;min-width:0;display:grid;grid-template-columns:300px minmax(0,1fr) 372px;gap:26px;padding:26px;align-items:start}.col{display:flex;flex-direction:column;gap:14px;min-width:0}.col-title{margin:0;font-size:15px;font-weight:600;letter-spacing:-.01em}.dropzone{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;min-height:168px;padding:22px;border:1.5px dashed var(--accent-border);border-radius:var(--radius);background:var(--panel);color:var(--muted);text-align:center;transition:border-color .15s,background .15s}.dropzone:hover,.dropzone.over{border-color:var(--accent);background:var(--accent-soft)}.dropzone .cloud{color:#b9bccd}.dropzone:hover .cloud,.dropzone.over .cloud{color:var(--accent)}.dropzone strong{color:var(--text);font-size:14px;font-weight:600}.dropzone small{font-size:12.5px}.media-list{display:flex;flex-direction:column;gap:10px}.media-item{display:flex;align-items:center;gap:12px;padding:10px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);text-align:left;width:100%}.media-item:hover{border-color:var(--accent-border);box-shadow:var(--shadow-sm)}.media-item.active{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.media-thumb{width:74px;height:52px;flex-shrink:0;border-radius:8px;object-fit:cover;background:linear-gradient(135deg,#cfd4e4,#eef0f7)}.media-thumb.audio{display:grid;place-items:center;background:var(--accent-soft);color:var(--accent)}.media-meta{min-width:0}.media-meta .name{font-size:13.5px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.media-meta .time{font-size:12.5px;color:var(--muted);margin-top:2px}.preview{position:relative;border-radius:var(--radius-lg);overflow:hidden;background:#11131c;aspect-ratio:16 / 9}.preview video,.preview img{width:100%;height:100%;object-fit:cover;display:block}.preview-empty{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;color:#7a8098;font-size:13.5px;text-align:center;padding:20px}.preview-bar{position:absolute;left:0;right:0;bottom:0;padding:16px 20px 14px;display:flex;flex-direction:column;gap:10px;background:linear-gradient(transparent,#0a0c14b8);color:#fff}.preview-row{display:flex;align-items:center;gap:12px}.preview-row .play{display:grid;place-items:center;width:30px;height:30px;border:0;border-radius:50%;background:transparent;color:#fff}.preview-row .time{font-size:13.5px;font-variant-numeric:tabular-nums}.scrub{height:4px;border-radius:3px;background:#ffffff47;overflow:hidden}.scrub i{display:block;height:100%;background:#fff;border-radius:3px}.timeline{display:flex;align-items:center;gap:0}.clip{position:relative;flex:1;min-width:0;aspect-ratio:16 / 10;border:2px solid transparent;border-radius:var(--radius);overflow:hidden;background:#cfd4e4;padding:0}.clip img{width:100%;height:100%;object-fit:cover;display:block}.clip.active{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.clip .dur{position:absolute;left:8px;bottom:7px;padding:2px 7px;border-radius:6px;background:#0c0e16a8;color:#fff;font-size:12px;font-variant-numeric:tabular-nums}.clip-gap{width:34px;flex-shrink:0;display:grid;place-items:center}.gap-btn{display:grid;place-items:center;width:30px;height:30px;border:1px solid var(--line);border-radius:9px;background:var(--panel);color:var(--accent);box-shadow:var(--shadow-sm)}.gap-btn:hover{border-color:var(--accent-border);background:var(--accent-soft)}.audio-track{display:flex;align-items:center;gap:12px;padding:12px 16px;border-radius:var(--radius);background:var(--wave);color:#2f7d5a}.audio-track .name{font-size:13px;font-weight:500;flex-shrink:0}.audio-track svg.wave{flex:1;height:34px;display:block}.ai-panel{padding:20px;border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--panel)}.ai-head{display:flex;align-items:center;gap:9px;font-size:15px;font-weight:600;margin-bottom:16px}.ai-head .mark{color:var(--accent);display:flex}.ai-label{display:block;font-size:13.5px;font-weight:500;margin-bottom:9px}.ai-input{position:relative}.ai-input textarea{width:100%;min-height:132px;padding:13px 14px 30px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);resize:vertical;font-size:13.5px;line-height:1.55}.ai-input textarea::placeholder{color:#a9adbe}.ai-input textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.ai-input .counter{position:absolute;right:12px;bottom:10px;font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums;pointer-events:none}.btn-primary{display:flex;align-items:center;justify-content:center;gap:9px;width:100%;margin-top:14px;padding:13px 18px;border:0;border-radius:var(--radius);background:var(--accent);color:#fff;font-size:14.5px;font-weight:600}.btn-primary:hover:not(:disabled){background:var(--accent-hover)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.ai-sub{margin:24px 0 12px;font-size:14px;font-weight:600}.suggestions{display:flex;flex-direction:column;gap:10px}.suggestion{display:flex;align-items:flex-start;gap:12px;padding:13px 14px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);text-align:left;width:100%}.suggestion:hover{border-color:var(--accent-border);background:#fcfbff}.suggestion .ico{display:grid;place-items:center;width:32px;height:32px;flex-shrink:0;border-radius:9px;background:var(--accent-soft);color:var(--accent)}.suggestion .title{display:block;font-size:13.5px;font-weight:600}.suggestion .desc{display:block;font-size:12.5px;color:var(--muted);margin-top:3px;line-height:1.45}.media-meta .name,.media-meta .time{display:block}.ai-note{margin-top:14px;text-align:center;font-size:12.5px;color:var(--muted)}.notice{padding:12px 14px;border:1px solid var(--accent-border);border-radius:var(--radius);background:var(--accent-soft);font-size:13px;line-height:1.5}.error{padding:11px 14px;border:1px solid #f2d0cf;border-radius:var(--radius);background:#fdf3f3;color:var(--err);font-size:13px}.muted{color:var(--muted);font-size:13px}.empty{padding:60px 24px;border:1px dashed var(--line);border-radius:var(--radius-lg);background:var(--panel);text-align:center;color:var(--muted)}@media(max-width:1240px){.editor{grid-template-columns:260px minmax(0,1fr)}.editor .col-ai{grid-column:1 / -1}}