:root{--bg: #f5f5f7;--card: #ffffff;--text: #1d1d1f;--text-2: #6e6e73;--text-3: #aeaeb2;--accent: #0071e3;--accent-soft: rgba(0, 113, 227, .1);--danger: #e30000;--line: rgba(0, 0, 0, .08);--radius: 14px;--shadow: 0 1px 2px rgba(0, 0, 0, .04), 0 8px 24px rgba(0, 0, 0, .06)}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,PingFang SC,Microsoft YaHei,sans-serif;font-size:14px;-webkit-font-smoothing:antialiased}.page{max-width:1080px;margin:0 auto;padding:28px 20px 60px}.app-header{display:flex;align-items:baseline;gap:12px;margin-bottom:20px}.app-header h1{font-size:24px;font-weight:700;margin:0;letter-spacing:.2px}.app-header .sub{color:var(--text-2);font-size:13px}.layer{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px 18px;margin-bottom:16px}.layer-head{display:flex;align-items:center;gap:10px;margin-bottom:12px;flex-wrap:wrap}.layer-no{width:22px;height:22px;border-radius:50%;background:var(--text);color:#fff;font-size:12px;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0}.layer-head h2{font-size:15px;font-weight:600;margin:0}.layer-head .hint{color:var(--text-3);font-size:12px}.layer-head .spacer{flex:1}.btn{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:none;cursor:pointer;padding:8px 16px;border-radius:999px;background:var(--fill, #eee);background:#eef0f3;color:var(--text);font-size:13.5px;font-family:inherit;transition:all .15s ease}.btn:hover{background:#e2e5ea}.btn:disabled{opacity:.45;cursor:not-allowed}.btn.primary{background:var(--accent);color:#fff}.btn.primary:hover{background:#0077ed}.btn.danger{background:none;color:var(--danger)}.btn.danger:hover{background:#e3000014}.btn.sm{padding:4px 12px;font-size:12.5px}input[type=number],input[type=text],select{border:1px solid var(--line);border-radius:8px;padding:6px 10px;font-size:13px;font-family:inherit;background:#fff;color:var(--text);outline:none}input[type=number]:focus,select:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}input[type=range]{accent-color:var(--accent)}input[type=color]{width:30px;height:30px;padding:0;border:none;background:none;cursor:pointer;border-radius:8px}label.field{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--text-2)}.seg{display:inline-flex;gap:3px;background:#eef0f3;border-radius:10px;padding:3px}.seg button{border:none;background:none;cursor:pointer;padding:5px 14px;border-radius:8px;font-size:13px;font-family:inherit;color:var(--text-2);transition:all .15s}.seg button.active{background:#fff;color:var(--text);box-shadow:0 1px 4px #0000001f;font-weight:600}.dropzone{display:flex;flex-direction:column;align-items:center;gap:8px;border:1.5px dashed rgba(0,0,0,.18);border-radius:12px;padding:34px 20px;cursor:pointer;transition:all .2s}.dropzone:hover,.dropzone.drag{border-color:var(--accent);background:var(--accent-soft)}.dropzone .icon{font-size:30px;display:block}.dropzone strong{display:block;font-size:15px}.dropzone span.tip{color:var(--text-3);font-size:12.5px}.video-pill{display:flex;align-items:center;gap:14px;flex-wrap:wrap;background:#f7f8fa;border-radius:10px;padding:10px 14px}.video-pill .name{font-weight:600;max-width:320px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.video-pill .meta{color:var(--text-2);font-size:12.5px;font-family:ui-monospace,monospace}.progress-line{height:4px;border-radius:2px;background:#eef0f3;overflow:hidden;margin-top:10px}.progress-line>div{height:100%;background:var(--accent);border-radius:2px;transition:width .2s}.wall-tools{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:10px}.wall-tools .count{color:var(--text-2);font-size:12.5px}.wall{display:grid;grid-template-columns:repeat(auto-fill,minmax(92px,1fr));gap:8px;max-height:380px;overflow-y:auto;padding:2px}.cell{position:relative;border-radius:10px;overflow:hidden;background:#000;cursor:pointer;aspect-ratio:16 / 10;border:2px solid transparent;transition:border-color .12s}.cell img{width:100%;height:100%;object-fit:contain;display:block}.cell:hover{border-color:#0071e380}.cell.sel{border-color:var(--accent)}.cell.sel:after{content:"✓";position:absolute;top:4px;right:4px;width:18px;height:18px;border-radius:50%;background:var(--accent);color:#fff;font-size:11px;display:flex;align-items:center;justify-content:center}.cell .tag{position:absolute;left:4px;bottom:4px;background:#0000008c;color:#fff;font-size:10px;padding:1px 6px;border-radius:6px;font-family:ui-monospace,monospace}.empty-hint{color:var(--text-3);font-size:13px;text-align:center;padding:26px 0}.viewer-wrap{position:relative}.viewer-stage{position:relative;border-radius:12px;overflow:hidden;background:#000;min-height:300px;display:flex;align-items:center;justify-content:center}.viewer-stage.checker{background-image:linear-gradient(45deg,#ddd 25%,transparent 25%),linear-gradient(-45deg,#ddd 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#ddd 75%),linear-gradient(-45deg,transparent 75%,#ddd 75%);background-size:18px 18px;background-position:0 0,0 9px,9px -9px,-9px 0;background-color:#fff}.viewer-stage canvas{max-width:100%;max-height:460px;cursor:crosshair;display:block}.arrow-btn{position:absolute;top:50%;transform:translateY(-50%);width:40px;height:40px;border-radius:50%;border:none;background:#ffffffe0;cursor:pointer;font-size:16px;color:var(--text);display:flex;align-items:center;justify-content:center;transition:all .15s;z-index:5;box-shadow:0 2px 10px #00000040}.arrow-btn.left{left:12px}.arrow-btn.right{right:12px}.arrow-btn:hover{background:var(--accent);color:#fff}.viewer-info{display:flex;align-items:center;justify-content:center;gap:14px;margin-top:10px;color:var(--text-2);font-size:12.5px;font-family:ui-monospace,monospace;flex-wrap:wrap}.color-dot{width:14px;height:14px;border-radius:4px;display:inline-block;vertical-align:-2px;border:1px solid var(--line)}.params-row{display:flex;align-items:center;gap:14px;flex-wrap:wrap}.params-row .group{display:flex;align-items:center;gap:8px}.slider-row{display:flex;align-items:center;gap:10px;min-width:220px;flex:1}.slider-row label{font-size:13px;color:var(--text-2);white-space:nowrap}.slider-row input{flex:1}.slider-row .val{font-family:ui-monospace,monospace;font-size:12.5px;color:var(--text);min-width:30px;text-align:right}.swatches{display:flex;gap:6px;align-items:center}.swatch{width:26px;height:26px;border-radius:8px;cursor:pointer;border:2px solid transparent;transition:border-color .12s}.swatch.active{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.export-bar{display:flex;justify-content:flex-end;gap:10px;flex-wrap:wrap}.status-line{margin-top:10px;font-size:12.5px;color:var(--text-2);min-height:18px;display:flex;align-items:center;gap:8px}.status-line.err{color:var(--danger)}.spin{width:14px;height:14px;border-radius:50%;border:2px solid var(--accent-soft);border-top-color:var(--accent);animation:spin .7s linear infinite;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}@media (max-width: 720px){.arrow-btn{width:34px;height:34px}}