:root{--bg-canvas:#e9e9ec;--bg-rail:#19191b;--bg-panel:#fff;--bg-soft:#f5f5f6;--bg-hover:#f0f0f2;--line:#e4e4e7;--line-strong:#d4d4d8;--text:#18181b;--text-2:#52525b;--text-3:#a1a1aa;--accent:#18181b;--white:#fff;--ok:#16a34a;--font:"Inter", -apple-system, sans-serif;--font-display:"Space Grotesk", "Inter", sans-serif;--r-sm:8px;--r-md:12px;--r-lg:16px;--r-full:999px;--shadow-sm:0 1px 2px #0000000f, 0 1px 3px #00000014;--shadow-md:0 4px 12px #00000014, 0 2px 4px #0000000a;--shadow-lg:0 24px 60px #00000029, 0 8px 20px #00000014;--ease:cubic-bezier(.32, .72, 0, 1);--ease-spring:cubic-bezier(.34, 1.56, .64, 1)}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100%}body{font-family:var(--font);background:var(--bg-panel);color:var(--text);-webkit-font-smoothing:antialiased;font-size:13px;overflow:hidden}button{font-family:var(--font)}.topbar{background:var(--bg-panel);border-bottom:1px solid var(--line);z-index:10;justify-content:space-between;align-items:center;height:60px;padding:0 20px;display:flex;position:relative}.brand{align-items:center;gap:10px;display:flex}.brand-mark{color:var(--white);background:var(--accent);width:30px;height:30px;box-shadow:var(--shadow-sm);border-radius:9px;justify-content:center;align-items:center;font-size:15px;display:flex}.brand-name{font-family:var(--font-display);letter-spacing:-.01em;font-size:15px;font-weight:600}.brand-name em{color:var(--text-3);font-style:normal;font-weight:500}.layout-switch{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--r-full);align-items:center;gap:2px;padding:3px;display:flex}.layout-switch .seg{border-radius:var(--r-full);width:34px;height:30px;color:var(--text-3);cursor:pointer;transition:all .2s var(--ease);background:0 0;border:none;justify-content:center;align-items:center;display:flex}.layout-switch .seg:hover{color:var(--text)}.layout-switch .seg.active{background:var(--white);color:var(--text);box-shadow:var(--shadow-sm)}.seg-icon{width:16px;height:16px;display:inline-flex}.seg-icon svg{width:100%;height:100%}.top-actions{align-items:center;gap:14px;display:flex}.export-hint{color:var(--text-3);font-size:12px}.export-btn{border-radius:var(--r-full);background:var(--accent);color:var(--white);cursor:pointer;box-shadow:var(--shadow-sm);transition:transform .15s var(--ease), box-shadow .2s, opacity .15s;border:none;align-items:center;gap:8px;padding:9px 20px;font-size:13px;font-weight:600;display:inline-flex}.export-btn:hover{box-shadow:var(--shadow-md);transform:translateY(-1px)}.export-btn:active{transform:scale(.96)}.export-btn:disabled{opacity:.4;cursor:not-allowed;box-shadow:none;transform:none}.export-btn.full{justify-content:center;width:100%;margin-top:18px;padding:12px}.export-btn.loading{pointer-events:none;opacity:.75}.export-btn.loading:after{content:"";border:2px solid #ffffff4d;border-top-color:#fff;border-radius:50%;width:13px;height:13px;animation:.7s linear infinite spin}.btn-icon{width:15px;height:15px;display:inline-flex}.btn-icon svg{width:100%;height:100%}.workspace{grid-template-columns:280px 1fr;height:calc(100vh - 60px);display:grid}.rail{background:var(--bg-rail);flex-direction:column;align-items:center;gap:4px;padding:14px 0;display:flex}.rail-btn{color:#8a8a92;cursor:pointer;width:44px;height:44px;transition:all .2s var(--ease);background:0 0;border:none;border-radius:12px;justify-content:center;align-items:center;display:flex;position:relative}.rail-btn:hover{color:#fff;background:#ffffff14}.rail-btn.active{color:#fff;background:#ffffff24}.rail-btn.active:before{content:"";background:#fff;border-radius:0 3px 3px 0;width:3px;height:20px;position:absolute;top:50%;left:-14px;transform:translateY(-50%)}.rail-btn .btn-icon{width:19px;height:19px}.rail-spacer{flex:1}.canvas-area{background:var(--bg-canvas);justify-content:center;align-items:center;min-width:0;display:flex;position:relative;overflow:hidden}.canvas-zoom-hint{color:var(--text-3);border-radius:var(--r-full);box-shadow:var(--shadow-sm);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:2;background:#fffc;padding:4px 10px;font-size:11px;position:absolute;top:14px;right:18px}.canvas-area:before{content:"";pointer-events:none;background-image:radial-gradient(circle,#0000000e 1px,#0000 1px);background-size:22px 22px;position:absolute;inset:0}.preview-welcome{z-index:1;text-align:center;max-width:460px;padding:50px;position:relative}.welcome-icon{background:var(--white);width:64px;height:64px;box-shadow:var(--shadow-md);color:var(--text);border-radius:20px;justify-content:center;align-items:center;margin:0 auto 26px;display:flex}.welcome-icon .btn-icon{width:26px;height:26px}.preview-welcome h1{font-family:var(--font-display);letter-spacing:-.03em;margin-bottom:14px;font-size:40px;font-weight:600;line-height:1.08}.preview-welcome h1 em{background:linear-gradient(120deg,#000 0%,#444 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;font-style:normal}.preview-welcome p{color:var(--text-2);margin-bottom:6px;font-size:14px}.primary-btn{border-radius:var(--r-full);background:var(--accent);color:var(--white);cursor:pointer;box-shadow:var(--shadow-md);transition:transform .15s var(--ease), box-shadow .2s;border:none;align-items:center;gap:8px;margin-top:22px;padding:12px 28px;font-size:14px;font-weight:600;display:inline-flex}.primary-btn:hover{box-shadow:var(--shadow-lg);transform:translateY(-1px)}.primary-btn:active{transform:scale(.96)}.welcome-tips{color:var(--text-3);justify-content:center;gap:8px;margin-top:18px;font-size:11px;display:flex}.preview-stage{z-index:1;flex-direction:column;align-items:center;gap:14px;max-width:100%;max-height:100%;padding:20px;display:flex;position:relative}#previewCanvas{object-fit:contain;max-width:100%;max-height:calc(100vh - 140px);display:block}.preview-controls{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border:1px solid var(--line);border-radius:var(--r-full);box-shadow:var(--shadow-md);background:#ffffffe6;align-items:center;gap:14px;min-width:340px;padding:6px 16px;display:flex}.round-btn{background:var(--accent);width:30px;height:30px;color:var(--white);cursor:pointer;transition:transform .12s var(--ease);border:none;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;display:flex}.round-btn:hover{transform:scale(1.08)}.round-btn .btn-icon{width:13px;height:13px}.time{color:var(--text-2);font-variant-numeric:tabular-nums;white-space:nowrap;font-size:11px}.seek{flex:1}.inspector{background:var(--bg-panel);border-right:1px solid var(--line);scrollbar-width:thin;scrollbar-color:var(--line-strong) transparent;overflow-y:auto}.inspector::-webkit-scrollbar{width:5px}.inspector::-webkit-scrollbar-thumb{background:var(--line-strong);border-radius:3px}.panel-group .group-body{transition:max-height .35s,opacity .25s;overflow:hidden}.panel-group .group-body[style*="display: none"]{opacity:0;max-height:0;padding-top:0;padding-bottom:0}.group-head.clickable{cursor:pointer;-webkit-user-select:none;user-select:none;transition:background .15s}.group-head.clickable:hover{background:var(--bg-hover)}.group-head.clickable .btn-icon{opacity:.55;width:14px;height:14px;margin-right:8px}.group-head.clickable h3{flex:1;font-size:12px}.chev{color:var(--text-3);transition:transform .25s var(--ease-spring);margin-left:8px;font-size:10px}.panel-group.open .chev{transform:rotate(180deg)}.badge{background:var(--bg-soft);color:var(--text-3);border-radius:var(--r-full);border:1px solid var(--line);margin-right:6px;padding:2px 8px;font-size:10px;font-weight:600}.group-head{align-items:center;display:flex}.group-head .btn-icon+h3{flex:none}.group-body{overflow:hidden}.export-btn.glow{animation:2s ease-in-out infinite export-glow}@keyframes export-glow{0%,to{box-shadow:var(--shadow-sm)}50%{box-shadow:0 0 20px #0000001f,0 4px 14px #00000026}}.icon-label{text-align:center;width:16px;color:var(--text-3);flex-shrink:0;font-size:11px}@keyframes panel-in{0%{opacity:0;transform:translate(8px)}to{opacity:1;transform:translate(0)}}.group-head{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;padding:20px 22px 12px;display:flex}.group-head h3{letter-spacing:.01em;font-size:13px;font-weight:600}.group-badge{letter-spacing:.08em;text-transform:uppercase;color:var(--text-3);background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--r-full);padding:3px 8px;font-size:10px;font-weight:600}.group-body{padding:18px 22px 26px}.field-label{color:var(--text-3);letter-spacing:.05em;text-transform:uppercase;margin-bottom:10px;font-size:11px;font-weight:600;display:block}.seg-row{background:var(--bg-soft);border:1px solid var(--line);border-radius:10px;gap:6px;padding:3px;display:flex}.seg-sm{color:var(--text-2);cursor:pointer;transition:all .18s var(--ease);white-space:nowrap;background:0 0;border:none;border-radius:7px;flex:1;padding:7px 8px;font-size:12px;font-weight:500}.seg-sm:hover{color:var(--text)}.seg-sm.active{background:var(--white);color:var(--text);box-shadow:var(--shadow-sm)}.grid-picker{grid-template-columns:repeat(2,1fr);gap:10px;display:grid}.grid-cell{border:1.5px solid var(--line);border-radius:var(--r-md);background:var(--bg-soft);color:var(--text-3);cursor:pointer;transition:all .18s var(--ease);justify-content:center;align-items:center;padding:16px 0;display:flex}.grid-cell:hover{border-color:var(--line-strong);color:var(--text);background:var(--bg-hover)}.grid-cell.active{border-color:var(--accent);color:var(--accent);background:var(--white);box-shadow:var(--shadow-sm)}.grid-cell .btn-icon{width:22px;height:22px}.slider-row{align-items:center;gap:12px;display:flex}.slider-row input[type=range]{flex:1}.slider-val{text-align:right;min-width:40px;color:var(--text-2);font-variant-numeric:tabular-nums;font-size:12px;font-weight:600}.slider-val.bounce{animation:val-bounce .3s var(--ease-spring);color:var(--accent)}@keyframes val-bounce{0%{transform:scale(1)}40%{transform:scale(1.3)}to{transform:scale(1)}}input[type=range]{appearance:none;background:var(--line-strong);cursor:pointer;border-radius:2px;outline:none;height:4px}input[type=range]::-webkit-slider-thumb{appearance:none;background:var(--white);border:1.5px solid var(--text);width:15px;height:15px;box-shadow:var(--shadow-sm);transition:transform .12s var(--ease);border-radius:50%}input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.2)}input[type=range]::-moz-range-thumb{background:var(--white);border:1.5px solid var(--text);border-radius:50%;width:14px;height:14px}.media-grid{grid-template-columns:repeat(2,1fr);gap:10px;margin-bottom:14px;display:grid}.media-cell{aspect-ratio:3/4;border:1.5px dashed var(--line-strong);border-radius:var(--r-md);background:var(--bg-soft);cursor:pointer;color:var(--text-3);transition:all .18s var(--ease);justify-content:center;align-items:center;display:flex;position:relative;overflow:hidden}.media-cell:hover{border-color:var(--text);color:var(--text)}.media-cell.filled{border-style:solid;border-color:#0000}.media-cell img{object-fit:cover;width:100%;height:100%}.media-cell .media-empty{text-align:center;font-size:10px}.media-cell .media-empty .btn-icon{width:18px;height:18px;margin:0 auto 6px;display:block}.media-cell .media-remove{color:#fff;cursor:pointer;opacity:0;background:#0009;border:none;border-radius:50%;justify-content:center;align-items:center;width:24px;height:24px;transition:opacity .15s;display:flex;position:absolute;top:6px;right:6px}.media-cell:hover .media-remove{opacity:1}.media-cell .media-remove .btn-icon{width:11px;height:11px}.media-cell .media-badge{color:#fff;border-radius:var(--r-full);background:#0009;padding:2px 7px;font-size:9px;font-weight:600;position:absolute;bottom:6px;left:6px}.ghost-btn{border:1px solid var(--line);background:var(--bg-soft);width:100%;color:var(--text-2);cursor:pointer;transition:all .18s var(--ease);border-radius:10px;justify-content:center;align-items:center;gap:7px;padding:9px;font-size:12px;font-weight:500;display:inline-flex}.ghost-btn:hover{border-color:var(--text);color:var(--text);background:var(--bg-hover)}.ghost-btn:active{transform:scale(.98)}.device-list{flex-wrap:wrap;gap:6px;display:flex}.device-list .chip{border:1px solid var(--line);border-radius:var(--r-full);background:var(--bg-soft);color:var(--text-2);cursor:pointer;transition:all .15s var(--ease);padding:6px 11px;font-size:11px;font-weight:500}.device-list .chip:hover{border-color:var(--text);color:var(--text)}.device-list .chip.active{background:var(--accent);color:var(--white);border-color:var(--accent)}.swatch-row{flex-wrap:wrap;gap:8px;margin-top:12px;display:flex}.swatch{border:2px solid var(--white);width:28px;height:28px;box-shadow:0 0 0 1px var(--line-strong);cursor:pointer;transition:all .15s var(--ease-spring);border-radius:50%;padding:0}.swatch:hover{transform:scale(1.15)}.swatch.active{box-shadow:0 0 0 2px var(--accent);transform:scale(1.15)}.chip-wrap{flex-wrap:wrap;gap:6px;display:flex}.chip-wrap .chip{border:1px solid var(--line);border-radius:var(--r-full);background:var(--bg-soft);color:var(--text-2);cursor:pointer;transition:all .15s var(--ease);padding:6px 12px;font-size:11px;font-weight:500}.chip-wrap .chip:hover{border-color:var(--text);color:var(--text)}.chip-wrap .chip.active{background:var(--accent);color:var(--white);border-color:var(--accent)}.toggle-row{color:var(--text-2);cursor:pointer;justify-content:space-between;align-items:center;font-size:12px;display:flex}.toggle-row input{display:none}.toggle-row .toggle{border-radius:var(--r-full);background:var(--line-strong);width:36px;height:21px;transition:background .2s;position:relative}.toggle-row .toggle:after{content:"";background:var(--white);width:16px;height:16px;transition:transform .2s var(--ease);border-radius:50%;position:absolute;top:2.5px;left:3px;box-shadow:0 1px 3px #0003}.toggle-row input:checked+.toggle{background:var(--accent)}.toggle-row input:checked+.toggle:after{transform:translate(14px)}.series-scroll{scrollbar-width:none;gap:6px;margin-bottom:14px;padding-bottom:8px;display:flex;overflow-x:auto}.series-scroll::-webkit-scrollbar{display:none}.series-chip{border:1px solid var(--line);border-radius:var(--r-full);background:var(--bg-soft);color:var(--text-2);cursor:pointer;transition:all .15s var(--ease);white-space:nowrap;flex-shrink:0;padding:6px 13px;font-size:11px;font-weight:500}.series-chip:hover{border-color:var(--text);color:var(--text)}.series-chip.active{background:var(--accent);color:var(--white);border-color:var(--accent)}.bg-grid{grid-template-columns:repeat(4,1fr);gap:9px;display:grid}.bg-pill{aspect-ratio:1;cursor:pointer;transition:all .15s var(--ease-spring);border:2px solid #0000;border-radius:10px;padding:0;box-shadow:inset 0 0 0 1px #0000000f}.bg-pill:hover{transform:scale(1.06)}.bg-pill.active{border-color:var(--accent);box-shadow:0 0 0 2px var(--white), 0 0 0 3.5px var(--accent);transform:scale(1.08)}.bg-pill.color-swatch{border-radius:50%}.color-picker{aspect-ratio:1;border:1px dashed var(--line-strong);cursor:pointer;opacity:.85;background:conic-gradient(red,#ff0,#0f0,#0ff,#00f,#f0f,red);border-radius:10px;width:100%;padding:0;transition:transform .15s}.color-picker:hover{transform:scale(1.06)}.size-list{flex-direction:column;gap:8px;display:flex}.size-cell{border:1.5px solid var(--line);border-radius:var(--r-md);background:var(--bg-soft);cursor:pointer;transition:all .18s var(--ease);text-align:left;justify-content:space-between;align-items:center;padding:12px 16px;display:flex}.size-cell:hover{border-color:var(--line-strong);background:var(--bg-hover)}.size-cell.active{border-color:var(--accent);background:var(--white);box-shadow:var(--shadow-sm)}.size-name{font-size:13px;font-weight:600}.size-dim{color:var(--text-3);font-variant-numeric:tabular-nums;font-size:11px}.field-note{color:var(--text-3);text-align:center;margin-top:12px;font-size:11px}.ripple-host{position:relative;overflow:hidden}.ripple{pointer-events:none;background:#ffffff59;border-radius:50%;animation:.5s ease-out forwards ripple-anim;position:absolute;transform:scale(0)}@keyframes ripple-anim{to{opacity:0;transform:scale(1)}}.rail-btn .ripple,.chip .ripple,.seg-sm .ripple{background:#18181b1a}.toast{background:var(--accent);color:var(--white);border-radius:var(--r-full);opacity:0;pointer-events:none;transition:all .3s var(--ease);z-index:100;box-shadow:var(--shadow-lg);padding:11px 24px;font-size:13px;position:fixed;bottom:28px;left:50%;transform:translate(-50%)translateY(20px)}.toast.show{opacity:1;transform:translate(-50%)translateY(0)}.loading-overlay{-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);z-index:99;background:#ffffffd9;flex-direction:column;justify-content:center;align-items:center;gap:16px;display:flex;position:fixed;inset:0}.loading-overlay.hidden{display:none}.spinner{border:3px solid var(--line);border-top-color:var(--text);border-radius:50%;width:28px;height:28px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.loading-overlay p{color:var(--text-2);font-size:13px}.hidden{display:none!important}@media (width<=1080px){.workspace{grid-template-columns:56px 1fr 280px}}@media (width<=860px){body{overflow:auto}.workspace{grid-template-columns:1fr;height:auto}.canvas-area{flex:1;min-height:60vh}.inspector{border-left:none;border-top:1px solid var(--line);max-height:35vh;overflow-y:auto}.layout-switch{display:none}.topbar{padding:0 12px}}