:root{--top-h:48px;--status-h:28px;--rail-w:52px;--panel-w:260px;--col-w:960px;--mid-h:calc(100dvh - var(--top-h) - var(--status-h));--bg:#e9edf1;--bg-chrome:#f0f2f5;--bg-paper:#fbfcfd;--bg-card:#f4f6f9;--bg-input:#e9edf1;--bg-top:#f0f2f5e0;--line:#e3e7ec;--text:#1c2128;--text-dim:#6b7280;--accent:#007acc;--accent-soft:#e5f1fb;--grid-line:#1c21280d;--shadow:0 10px 34px #0f172a24;--mono:ui-monospace, "SFMono-Regular", Consolas, "Cascadia Mono", monospace;--sans:-apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif}body.dark{--bg:#0b0f14;--bg-chrome:#10161d;--bg-paper:#151c24;--bg-card:#1a222c;--bg-input:#0b0f14;--bg-top:#10161de6;--line:#28313c;--text:#e6edf3;--text-dim:#8b949e;--accent:#3794ff;--accent-soft:#3794ff24;--grid-line:#e6edf30b;--shadow:0 10px 34px #0000008c}*{box-sizing:border-box}[hidden]{display:none!important}html,body{height:100%;margin:0}body{font-family:var(--sans);color:var(--text);background:var(--bg);overflow:hidden}button{cursor:pointer;font-family:inherit}a{color:var(--accent);text-decoration:none}.shell{grid-template-columns:var(--rail-w) 1fr;grid-template-rows:var(--top-h) 1fr var(--status-h);grid-template-areas:"top top""rail middle""status status";height:100dvh;display:grid}.top{background:var(--bg-top);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);z-index:30;grid-area:top;justify-content:space-between;align-items:center;gap:12px;padding:0 14px;display:flex}.top-left,.top-right{align-items:center;gap:10px;display:flex}.logo{color:var(--text);letter-spacing:.02em;align-items:center;gap:9px;font-weight:650;display:flex}.logo-mark{background:var(--accent);color:#fff;border-radius:4px;place-items:center;width:26px;height:26px;font-size:14px;font-weight:700;display:grid}.logo-name{font-size:15px}.pico{flex:none;width:14px;height:14px}.pico.sm{width:12px;height:12px}.top-crumb{align-items:center;gap:7px;min-width:0;margin-left:4px;font-size:13px;display:flex}.crumb-link{color:var(--text-dim);white-space:nowrap;align-items:center;gap:5px;display:inline-flex}.crumb-link:hover{color:var(--accent)}.crumb-sep{color:var(--text-dim);opacity:.6;display:inline-flex}.crumb-sep .pico{width:12px;height:12px}.crumb-cur{color:var(--text);text-overflow:ellipsis;white-space:nowrap;min-width:0;max-width:36vw;overflow:hidden}.btn{border:1px solid var(--line);background:var(--bg-paper);color:var(--text);border-radius:7px;align-items:center;gap:6px;padding:7px 11px;font-size:13px;display:inline-flex}.btn:hover{border-color:var(--accent);color:var(--accent)}.btn .pico{width:15px;height:15px}.search-box{width:min(380px,42vw);height:calc(var(--top-h) - 12px);box-sizing:border-box;background:var(--bg-input);color:var(--text-dim);border:0;border-radius:0;align-items:center;gap:8px;padding:0 11px;font-size:13px;display:flex}.search-box:hover{outline:1px solid var(--line);outline-offset:-1px}.search-box:focus-within{outline:1px solid var(--accent);outline-offset:-1px}.search-box input{color:var(--text);background:0 0;border:0;outline:0;width:100%;height:100%;font-size:13px}.kbd{font-family:var(--mono);color:var(--text-dim);border:1px solid var(--line);white-space:nowrap;border-radius:4px;padding:1px 5px;font-size:10px}.top .btn{height:calc(var(--top-h) - 12px);box-sizing:border-box}.rail{background:var(--bg-chrome);border-right:1px solid var(--line);z-index:20;flex-direction:column;grid-area:rail;justify-content:space-between;align-items:center;padding:10px 0;display:flex}.rail-group{flex-direction:column;align-items:center;gap:6px;display:flex}.rail-btn{width:40px;height:40px;color:var(--text-dim);background:0 0;border:0;border-radius:7px;justify-content:center;align-items:center;gap:10px;display:flex;position:relative}.rail-btn:hover{background:var(--accent-soft);color:var(--accent)}.rail-btn.active{color:var(--accent);background:var(--accent-soft)}.rail-btn.active:before{content:"";background:var(--accent);border-radius:0;width:3px;height:22px;position:absolute;top:9px;left:-10px}.rail-btn svg{flex:none;width:20px;height:20px}.rail-label{white-space:nowrap;font-size:13px;display:none}.rail-btn .tip{background:var(--text);color:var(--bg-paper);white-space:nowrap;opacity:0;pointer-events:none;z-index:50;border-radius:7px;padding:4px 9px;font-size:12px;transition:opacity .12s;position:absolute;top:50%;left:48px;transform:translateY(-50%)}.rail-btn:hover .tip{opacity:1}.rail-l4{display:none}.sheet-overlay{z-index:60;backdrop-filter:blur(3px);background:#0a0e146b;position:fixed;inset:0}.sheet-overlay[hidden]{display:none}.sheet{background:var(--bg-chrome);border-top:1px solid var(--line);border-radius:12px 12px 0 0;gap:2px;padding:10px 12px 26px;display:grid;position:absolute;bottom:0;left:0;right:0}.sheet-item{color:var(--text);background:0 0;border:0;border-radius:7px;align-items:center;gap:10px;padding:13px 14px;font-family:inherit;font-size:15px;display:flex}.sheet-item:hover,.sheet-item:active{background:var(--accent-soft);color:var(--accent)}.sheet-item .pico{width:18px;height:18px}.middle{flex-direction:column;min-width:0;min-height:0;display:flex;position:relative;overflow-y:auto}.stage{--panel-w:320px;background-color:var(--bg);background-image:linear-gradient(var(--grid-line) 1px, transparent 1px), linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);background-size:28px 28px;flex:1 0 auto;align-items:flex-start;display:flex;position:relative}.canvas{will-change:transform;flex:1;min-width:0;padding:26px 0}.canvas-inner{width:min(var(--col-w), 100% - 40px);background:var(--bg-paper);box-shadow:0 0 0 1px var(--line);border-radius:12px;flex-direction:column;margin:0 auto;padding:34px 38px 26px;display:flex}.panel{width:var(--panel-w);background:var(--bg-chrome);border-left:1px solid var(--line);will-change:transform;flex-direction:column;flex-shrink:0;display:flex}.panel-inner{flex-direction:column;flex:1 0 auto;min-height:0;display:flex}.panel-inner>.panel-sec:last-child{margin-top:auto}.panel-head{letter-spacing:.12em;color:var(--text-dim);text-transform:uppercase;border-bottom:1px solid var(--line);align-items:center;gap:7px;padding:10px 12px 8px;font-size:11px;font-weight:600;display:flex}.panel-head .sp{flex:1}.panel-toggle{border:1px solid var(--line);color:var(--text-dim);background:0 0;border-radius:7px;place-items:center;width:26px;height:26px;line-height:1;display:grid}.panel-toggle .pico{width:13px;height:13px}.panel-toggle:hover{color:var(--accent);border-color:var(--accent)}.panel-toggle.is-closed .pico{transform:scaleX(-1)}.panel-sec{border-bottom:1px solid var(--line)}.panel-sec:last-child{border-bottom:0}.panel-sec summary{cursor:pointer;letter-spacing:.12em;color:var(--text-dim);text-transform:uppercase;justify-content:flex-start;align-items:center;gap:6px;padding:12px 14px 6px;font-size:11px;font-weight:600;list-style:none;display:flex}.panel-sec summary .caret{color:var(--text-dim);transition:transform .12s;display:inline-flex}.panel-sec summary .caret .pico{width:12px;height:12px}.panel-sec details:not([open]) .caret{transform:rotate(-90deg)}.panel-sec details>:not(summary){padding-left:10px;padding-right:10px}.panel-list{margin:0;padding:0 0 8px;list-style:none}.panel-list li{margin:1px 0}.panel-list a,.panel-list 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