:root{--bg: #0b0e14;--panel: #121722;--panel-2: #171d2b;--line: #232b3d;--text: #e6ebf5;--muted: #8b96ad;--accent: #ff8c42;--accent-soft: rgba(255, 140, 66, .14);--wall-outer: #ff8c42;--wall-inner: #ffc16b;--skin: #4dd0e1;--infill: #7c8cff;--support: #6b7280;--brim: #43a047;--sidebar-w: 400px}*{box-sizing:border-box}html,body{margin:0;height:100%;background:var(--bg);color:var(--text);font-family:Noto Sans SC,Source Han Sans SC,system-ui,-apple-system,sans-serif;font-size:15px;line-height:1.7;-webkit-font-smoothing:antialiased}#app{display:grid;grid-template-columns:var(--sidebar-w) 1fr;height:100%}.sidebar{background:var(--panel);border-right:1px solid var(--line);display:flex;flex-direction:column;overflow:hidden}.brand{display:flex;align-items:center;gap:12px;padding:18px 22px 14px;border-bottom:1px solid var(--line)}.brand-mark{width:30px;height:30px;border-radius:7px;flex:none;background:repeating-linear-gradient(180deg,var(--accent) 0 3px,#0b0e14 3px 5px);box-shadow:0 0 0 1px var(--line)}.brand h1{font-size:16px;margin:0;letter-spacing:.3px}.brand p{margin:0;font-size:12px;color:var(--muted)}.chapter-nav{display:flex;flex-wrap:wrap;gap:6px;padding:12px 18px;border-bottom:1px solid var(--line)}.chapter-nav button{font:inherit;font-size:12.5px;padding:4px 10px;border-radius:999px;border:1px solid var(--line);background:transparent;color:var(--muted);cursor:pointer;transition:all .15s}.chapter-nav button:hover{color:var(--text);border-color:#33405c}.chapter-nav button[aria-current=true]{background:var(--accent-soft);border-color:var(--accent);color:var(--accent)}.lesson{padding:20px 22px 4px;overflow-y:auto;flex:1}.lesson h2{font-size:20px;margin:0 0 2px;letter-spacing:.2px}.lesson-sub{margin:0 0 14px;color:var(--muted);font-size:13px}.lesson-body p{margin:0 0 12px}.lesson-body ul{margin:0 0 12px;padding-left:18px}.lesson-body li{margin-bottom:7px}.lesson-body strong{color:#fff;font-weight:600}.lesson-body .callout{border-left:3px solid var(--accent);background:var(--accent-soft);padding:10px 14px;border-radius:0 6px 6px 0}.lesson-body .tip{font-size:13.5px;color:var(--muted);background:var(--panel-2);border:1px solid var(--line);border-radius:8px;padding:10px 13px}.lesson-body .tip:before{content:"经验值 ";color:var(--accent);font-weight:600}.controls{border-top:1px solid var(--line);padding:14px 22px;background:var(--panel-2);max-height:42vh;overflow-y:auto}.ctrl{margin-bottom:13px}.ctrl:last-child{margin-bottom:0}.ctrl-head{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:5px}.ctrl-label{font-size:13px;color:var(--muted)}.ctrl-value{font-variant-numeric:tabular-nums;font-size:13px;color:var(--accent);font-weight:600}input[type=range]{width:100%;height:4px;appearance:none;background:#2a3346;border-radius:2px;outline:none}input[type=range]::-webkit-slider-thumb{appearance:none;width:15px;height:15px;border-radius:50%;background:var(--accent);cursor:pointer;border:2px solid var(--panel)}input[type=range]::-moz-range-thumb{width:15px;height:15px;border:2px solid var(--panel);border-radius:50%;background:var(--accent);cursor:pointer}select{width:100%;font:inherit;font-size:13px;padding:5px 8px;border-radius:6px;background:var(--panel);color:var(--text);border:1px solid var(--line)}.ctrl-note{font-size:12px;color:var(--muted);margin-top:4px}.model-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:2px}.model-card{display:flex;flex-direction:column;align-items:center;gap:6px;padding:8px 6px;font:inherit;color:var(--muted);background:var(--panel);border:1px solid var(--line);border-radius:8px;cursor:pointer;transition:color .12s,border-color .12s,background .12s}.model-card:hover{color:var(--text);border-color:#33405c}.model-card[aria-pressed=true]{color:var(--accent);border-color:var(--accent);background:var(--accent-soft)}.model-thumb{display:flex;justify-content:center;width:100%;color:inherit}.model-thumb svg{width:54px;height:54px;display:block}.model-name{font-size:12px;line-height:1}.switch{display:flex;align-items:center;gap:9px;cursor:pointer}.switch input{accent-color:var(--accent);width:15px;height:15px}.switch span{font-size:13px}.chapter-steps{display:flex;gap:8px;padding:12px 22px 16px;border-top:1px solid var(--line)}.step-btn{flex:1;font:inherit;font-size:13px;padding:8px;border-radius:7px;border:1px solid var(--line);background:transparent;color:var(--muted);cursor:pointer;transition:all .15s}.step-btn:hover:not(:disabled){color:var(--text);border-color:#33405c}.step-btn.primary{background:var(--accent);border-color:var(--accent);color:#1a1005;font-weight:600}.step-btn.primary:hover:not(:disabled){filter:brightness(1.1);color:#1a1005}.step-btn:disabled{opacity:.35;cursor:default}.viewport{position:relative;overflow:hidden}#canvas-host{position:absolute;inset:0}#canvas-host canvas{display:block;width:100%;height:100%}.overlay{position:absolute;background:#0b0e14d1;border:1px solid var(--line);border-radius:9px;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);font-size:12.5px}.legend{top:16px;right:16px;padding:11px 14px}.legend-row{display:flex;align-items:center;gap:8px;margin-bottom:5px;font:inherit;font-size:12.5px;background:none;border:none;padding:2px 4px;margin-left:-4px;border-radius:5px;cursor:pointer;width:calc(100% + 8px);transition:opacity .15s,background .12s}.legend-row:last-child{margin-bottom:0}.legend-row:hover{background:#ffffff0f}.legend-row[aria-pressed=false]{opacity:.35}.legend-row[aria-pressed=false] .legend-swatch{background:var(--muted)!important}.legend-swatch{width:11px;height:11px;border-radius:3px;flex:none}.legend-row span:last-child{color:var(--muted)}.stats{left:16px;bottom:74px;padding:12px 15px;min-width:178px}.stat-row{display:flex;justify-content:space-between;gap:18px;margin-bottom:4px}.stat-row:last-child{margin-bottom:0}.stat-row span:first-child{color:var(--muted)}.stat-row span:last-child{font-variant-numeric:tabular-nums;font-weight:600}.busy{top:50%;left:50%;transform:translate(-50%,-50%);padding:10px 20px;color:var(--accent)}.view-toolbar{position:absolute;top:16px;left:16px;display:flex;gap:5px;background:#0b0e14d1;border:1px solid var(--line);border-radius:9px;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);padding:6px 8px}.view-toolbar button{font:inherit;font-size:12px;width:28px;height:26px;border-radius:6px;border:1px solid transparent;background:transparent;color:var(--muted);cursor:pointer;transition:all .12s}.view-toolbar button:hover{color:var(--text);background:var(--panel-2);border-color:var(--line)}.view-toolbar button:active{color:var(--accent);border-color:var(--accent)}.playbar{position:absolute;left:16px;right:16px;bottom:16px;height:46px;display:flex;align-items:center;gap:13px;padding:0 15px;background:#0b0e14db;border:1px solid var(--line);border-radius:11px;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.play-btn{width:30px;height:30px;flex:none;border-radius:50%;border:none;background:var(--accent);color:#1a1005;font-size:13px;cursor:pointer;display:grid;place-items:center}.playbar input[type=range]{flex:1}.layer-readout{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums;min-width:92px;text-align:right}.ghost-btn{font:inherit;font-size:12px;padding:5px 11px;border-radius:7px;border:1px solid var(--line);background:transparent;color:var(--muted);cursor:pointer;flex:none;transition:all .15s}.ghost-btn:hover{color:var(--text);border-color:#33405c}.ghost-btn[aria-pressed=true]{background:var(--accent-soft);border-color:var(--accent);color:var(--accent)}.speed{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:6px}.speed select{width:auto;padding:3px 6px;font-size:12px}@media(max-width:1000px){#app{grid-template-columns:1fr;grid-template-rows:1fr 45vh}.sidebar{order:2;border-right:none;border-top:1px solid var(--line)}.viewport{order:1}.controls{max-height:none}}