:root{--bg: #f7f8fa;--surface: #ffffff;--surface-muted: #f1f4f7;--surface-soft: #f8fafc;--line: #dfe5ec;--line-soft: #ebeff4;--text: #171a1f;--text-muted: #657080;--text-soft: #8a95a3;--accent: #2f343d;--accent-blue: #2f80ed;--success: #2f9461;--warning: #d89b2b;--danger: #cf4d4d;--radius: 8px;--shadow-soft: 0 14px 38px rgba(34, 45, 58, .08);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,PingFang SC,sans-serif;color:var(--text);background:var(--bg)}*{box-sizing:border-box}body{margin:0;min-width:1180px;background:var(--bg)}button,input,textarea,select{font:inherit}button{border:0;cursor:pointer}.hidden-video{position:fixed;left:-2px;top:-2px;width:1px;height:1px;opacity:0;pointer-events:none}.app-shell{min-height:100vh;background:linear-gradient(180deg,#ffffffd6,#f7f8faf5),var(--bg)}.topbar{display:flex;align-items:center;gap:18px;height:58px;padding:0 18px;border-bottom:1px solid var(--line);background:#ffffffe6;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.brand{display:flex;align-items:center;gap:10px;min-width:210px}.brand-mark{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;color:#2f7d52;background:#e8f4ed;border:1px solid #d9eadf;border-radius:8px}.brand strong{display:block;font-size:16px;letter-spacing:0}.brand span:last-child{display:block;margin-top:1px;color:var(--text-soft);font-size:11px}.project-meta{display:flex;align-items:center;min-width:0;flex:1;gap:10px;color:var(--text-muted);font-size:13px}.project-meta input{width:150px;height:32px;border:1px solid transparent;border-radius:6px;background:transparent;color:var(--text);font-weight:600;padding:0 8px}.project-meta input:focus{outline:none;border-color:var(--line);background:var(--surface)}.project-meta strong{overflow:hidden;max-width:240px;color:var(--text);font-size:13px;font-weight:600;text-overflow:ellipsis;white-space:nowrap}.saved{display:inline-flex;align-items:center;gap:5px;color:var(--success);white-space:nowrap}.top-actions{display:flex;align-items:center;gap:8px}.icon-button,.mini-button,.primary-button,.extract-button{display:inline-flex;align-items:center;justify-content:center;gap:7px;height:34px;border-radius:8px;border:1px solid var(--line);background:var(--surface);color:var(--text);transition:background .14s ease,border-color .14s ease,transform .14s ease}.icon-button{width:34px}.mini-button{padding:0 12px;color:var(--text-muted);font-size:12px}.primary-button{padding:0 14px;border-color:var(--accent);background:var(--accent);color:#fff;font-weight:650}.primary-button.wide,.extract-button{width:100%}.extract-button{background:#eef5ff;color:#225fa8;border-color:#d7e6fa;font-weight:650}.icon-button:hover,.mini-button:hover,.extract-button:hover{background:var(--surface-muted)}.primary-button:hover{transform:translateY(-1px);background:#161a20}.workspace{display:grid;grid-template-columns:350px minmax(560px,1fr) 378px;height:calc(100vh - 58px);min-height:760px}.clip-rail,.inspector{overflow:auto;background:#ffffffb8}.clip-rail{border-right:1px solid var(--line)}.inspector{border-left:1px solid var(--line)}.panel-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;height:68px;padding:0 16px;border-bottom:1px solid var(--line-soft)}.panel-heading h2,.section-title h3,.inspector-section h3,.json-head h3,.export-panel h3{margin:0;color:var(--text);font-size:14px;line-height:1.2;letter-spacing:0}.panel-heading p,.section-title p,.export-panel p,.source-card p{margin:4px 0 0;color:var(--text-soft);font-size:12px;line-height:1.45}.clip-list{border-bottom:1px solid var(--line-soft)}.clip-row{position:relative;display:grid;grid-template-columns:24px 104px minmax(0,1fr);gap:10px;width:100%;min-height:132px;padding:12px 12px 12px 16px;border-bottom:1px solid var(--line-soft);background:transparent;text-align:left;cursor:pointer}.clip-row.selected{background:#f7fbff;box-shadow:inset 3px 0 0 var(--accent-blue)}.clip-index{display:inline-flex;align-items:center;justify-content:center;width:20px;height:20px;margin-top:42px;border-left:2px solid;font-size:12px;font-weight:700}.clip-thumb{display:flex;align-items:center;justify-content:center;width:104px;height:104px;border:1px solid var(--line);border-radius:7px;background:var(--surface)}.clip-thumb img{max-width:88px;max-height:88px;image-rendering:pixelated}.clip-info{display:flex;flex-direction:column;min-width:0;padding-right:104px;padding-top:8px;color:var(--text-muted);font-size:12px;line-height:1.65}.clip-info strong{color:var(--text);font-size:14px}.state-pill{position:absolute;right:14px;top:17px;padding:3px 7px;border-radius:7px;background:#e7f3e9;color:#2d7f50;font-size:11px;font-weight:650}.state-select{position:absolute;right:12px;top:14px;display:grid;gap:4px;min-width:92px;color:var(--text-soft);font-size:11px}.state-select select{height:28px;border:1px solid var(--line);border-radius:7px;background:var(--surface);color:var(--text);padding:0 7px;font-size:12px;font-weight:650}.upload-zone{display:flex;align-items:center;justify-content:center;gap:8px;height:44px;margin:16px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--text);font-size:13px;font-weight:650;cursor:pointer}.upload-zone input{display:none}.source-card{margin:0 16px 16px;padding:14px;border:1px solid var(--line-soft);border-radius:8px;background:var(--surface)}.source-card span{color:var(--text-soft);font-size:11px}.source-card strong{display:block;margin-top:4px;color:var(--text);font-size:13px}.main-lab{display:grid;grid-template-rows:58px minmax(320px,44vh) 48px 1fr 142px;min-width:0;background:#f6f8fa}.tool-strip{display:flex;align-items:center;gap:14px;padding:0 20px;border-bottom:1px solid var(--line);background:#ffffffbf}.state-selector,.switch-control,.zoom-control{display:inline-flex;align-items:center;gap:8px;height:34px;border-right:1px solid var(--line);padding-right:18px;color:var(--text);font-size:13px;font-weight:650}.switch-control{color:var(--text-muted)}.switch-control input{width:42px;height:22px;accent-color:var(--accent-blue)}.switch-control.muted{opacity:.56}.state-selector{background:transparent;border-left:0;border-top:0;border-bottom:0}.zoom-control{flex:1;justify-content:flex-end;border-right:0;padding-right:0;color:var(--text-muted);font-weight:500}.zoom-control input{width:110px}.preview-stage{display:grid;grid-template-columns:minmax(340px,1.08fr) minmax(280px,.92fr);align-items:stretch;gap:0;overflow:hidden;padding:16px 20px;border-bottom:1px solid var(--line);background:#fff}.source-preview-panel,.sprite-preview-panel{display:flex;flex-direction:column;min-width:0;min-height:0;overflow:hidden;border:1px solid var(--line-soft);background:var(--surface)}.source-preview-panel{border-right:0;border-radius:8px 0 0 8px}.sprite-preview-panel{border-radius:0 8px 8px 0}.preview-panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:46px;padding:0 14px;border-bottom:1px solid var(--line-soft);background:#fbfcfd}.preview-panel-head span{display:block;color:var(--text-soft);font-size:11px}.preview-panel-head strong{display:block;overflow:hidden;max-width:260px;color:var(--text);font-size:13px;text-overflow:ellipsis;white-space:nowrap}.preview-panel-head em{color:var(--text-muted);font-size:12px;font-style:normal;white-space:nowrap}.source-video-shell{position:relative;display:flex;align-items:center;justify-content:center;flex:1;min-height:0;overflow:hidden;background:#15181d}.source-video{width:100%;height:100%;background:#111418;object-fit:contain}.source-video-placeholder{display:inline-flex;flex-direction:column;align-items:center;gap:8px;color:#d8dee7;font-size:13px}.source-range-readout{position:absolute;left:12px;bottom:12px;max-width:calc(100% - 24px);overflow:hidden;padding:6px 9px;border:1px solid rgba(255,255,255,.16);border-radius:7px;background:#0c0f13b8;color:#fff;font-size:12px;text-overflow:ellipsis;white-space:nowrap}.source-preview-actions{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;padding:10px;border-top:1px solid var(--line-soft);background:#fbfcfd}.source-preview-actions button{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-width:0;height:32px;padding:0 8px;border:1px solid var(--line);border-radius:7px;background:var(--surface);color:var(--text);font-size:12px;font-weight:650;white-space:nowrap}.source-preview-actions button:disabled{cursor:not-allowed;opacity:.48}.checkerboard{background-color:#fff;background-image:linear-gradient(45deg,#edf0f4 25%,transparent 25%),linear-gradient(-45deg,#edf0f4 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#edf0f4 75%),linear-gradient(-45deg,transparent 75%,#edf0f4 75%);background-position:0 0,0 12px,12px -12px,-12px 0;background-size:24px 24px}.preview-canvas{position:relative;display:flex;align-items:center;justify-content:center;flex:1;width:100%;height:100%;min-height:0}.preview-canvas img{max-width:72%;max-height:84%;object-fit:contain;image-rendering:pixelated;filter:drop-shadow(0 18px 24px rgba(24,32,42,.16))}.preview-badge{position:absolute;left:18px;top:16px;max-width:calc(100% - 36px);overflow:hidden;padding:7px 10px;border:1px solid rgba(23,26,31,.12);border-radius:7px;background:#ffffffeb;color:var(--text);font-size:12px;font-weight:650;text-overflow:ellipsis;white-space:nowrap;box-shadow:var(--shadow-soft)}.transport{display:flex;align-items:center;gap:12px;padding:0 20px;border-bottom:1px solid var(--line-soft);background:var(--surface)}.transport button{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:7px;background:transparent;color:var(--accent)}.transport input[type=range]{flex:1;accent-color:var(--accent-blue)}.transport span{width:170px;color:var(--text-muted);font-size:12px;text-align:right}.transport select{height:32px;border:1px solid var(--line);border-radius:7px;background:var(--surface);color:var(--text);padding:0 10px}.sampler{overflow:hidden;padding:16px 20px 12px;border-bottom:1px solid var(--line);background:var(--surface)}.section-title{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:14px}.section-title.compact{margin-bottom:10px}.inline-controls{display:inline-grid;grid-template-columns:36px 54px 36px;height:34px;overflow:hidden;border:1px solid var(--line);border-radius:8px}.inline-controls button,.inline-controls input{border:0;border-right:1px solid var(--line);background:var(--surface);color:var(--text);text-align:center}.inline-controls button:last-child{border-right:0}.frame-grid{display:grid;grid-template-columns:repeat(9,minmax(54px,1fr));gap:10px}.frame-grid button{display:flex;flex-direction:column;align-items:center;gap:5px;min-width:0;padding:6px 4px 5px;border:1px solid var(--line);border-radius:7px;background:var(--surface-soft)}.frame-grid button.active{border-color:var(--accent-blue);box-shadow:0 0 0 2px #2f80ed1f}.frame-grid img{width:42px;height:42px;object-fit:contain;image-rendering:pixelated}.frame-grid span{color:var(--text-soft);font-size:11px}.sampler-foot{display:flex;justify-content:space-between;margin-top:12px;color:var(--text-muted);font-size:12px}.timeline-panel{padding:14px 20px 18px;background:#fbfcfd}.timeline-ruler{position:relative;height:20px;color:var(--text-soft);font-size:11px}.timeline-ruler span{position:absolute;transform:translate(-50%)}.timeline-track{position:relative;height:42px;border-radius:8px;background:#dfe4eb;box-shadow:inset 0 0 0 1px var(--line)}.timeline-playhead{position:absolute;top:2px;z-index:4;width:2px;height:38px;pointer-events:none;background:#171a1f;box-shadow:0 0 0 1px #ffffffd1}.timeline-playhead:after{position:absolute;top:-3px;left:50%;width:8px;height:8px;border-radius:50%;background:#171a1f;content:"";transform:translate(-50%)}.timeline-segment{--segment-color: #2f80ed;position:absolute;top:7px;display:flex;align-items:center;justify-content:center;height:28px;min-width:42px;border:1px solid color-mix(in srgb,var(--segment-color) 78%,white);border-radius:7px;background:color-mix(in srgb,var(--segment-color) 14%,white);color:color-mix(in srgb,var(--segment-color) 76%,black);font-size:12px;font-weight:700}.timeline-segment.active{box-shadow:0 0 0 2px color-mix(in srgb,var(--segment-color) 20%,transparent)}.handle{position:absolute;top:-5px;width:10px;height:38px;border-radius:5px;background:var(--segment-color);cursor:ew-resize}.handle.start{left:-5px}.handle.end{right:-5px}.inspector-tabs{display:grid;grid-template-columns:1fr 1fr;height:50px;border-bottom:1px solid var(--line);background:var(--surface)}.inspector-tabs button{display:inline-flex;align-items:center;justify-content:center;gap:6px;border-bottom:2px solid transparent;background:transparent;color:var(--text-muted);font-size:13px}.inspector-tabs button.active{border-bottom-color:var(--accent-blue);color:var(--text);font-weight:700}.valid-row{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:8px;padding:16px;color:var(--success);font-size:13px}.valid-row button,.json-head button{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border:1px solid var(--line);border-radius:7px;background:var(--surface);color:var(--text-muted)}.inspector-section{padding:0 16px 16px;border-bottom:1px solid var(--line-soft)}.inspector-section h3{margin:0 0 12px}.inspector-section label{display:grid;gap:6px;margin-bottom:10px;color:var(--text-muted);font-size:12px}.inspector-section input,.inspector-section textarea,.inspector-section select{width:100%;border:1px solid var(--line);border-radius:7px;background:var(--surface);color:var(--text);padding:8px 9px;resize:vertical}.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}.color-field{grid-template-columns:68px 44px 1fr;align-items:center}.color-field input[type=color]{height:34px;padding:2px}.color-field code{color:var(--text-muted)}.state-table{display:grid;gap:6px}.state-table button{display:grid;grid-template-columns:9px 1fr 62px 44px;align-items:center;gap:8px;min-height:34px;border:1px solid var(--line-soft);border-radius:7px;background:var(--surface-soft);color:var(--text-muted);padding:0 9px;text-align:left}.state-table button.active{border-color:#bcd7f6;background:#f4f9ff}.state-table span{width:8px;height:8px;border-radius:99px}.state-table strong{color:var(--text);font-size:12px}.state-table em,.state-table small{color:var(--text-soft);font-size:11px;font-style:normal;text-align:right}.json-panel{border-bottom:1px solid var(--line-soft)}.json-head{display:flex;align-items:center;justify-content:space-between;padding:14px 16px 8px}.json-panel pre{overflow:auto;max-height:220px;margin:0;padding:0 16px 16px;color:#315d92;font-family:SFMono-Regular,Consolas,Liberation Mono,monospace;font-size:11px;line-height:1.55;white-space:pre-wrap}.export-panel{display:grid;gap:10px;padding:16px}.export-panel code{display:block;overflow:hidden;padding:10px 11px;border-radius:7px;background:#2f343d;color:#fff;font-size:12px;text-overflow:ellipsis;white-space:nowrap}.export-note{color:var(--text-soft);font-size:12px;line-height:1.4}.spin{animation:spin .85s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media (max-width: 1240px){body{min-width:980px}.workspace{grid-template-columns:300px minmax(520px,1fr) 330px}.frame-grid{grid-template-columns:repeat(6,minmax(54px,1fr))}}