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0;display:flex}.scene-title:where(.astro-ttnb4mkl){color:#365563;letter-spacing:.04em;font-size:12px;font-weight:550}.scene-caption:where(.astro-ttnb4mkl){color:#69818d;letter-spacing:.03em;flex-shrink:0;align-items:center;gap:6px;font-size:10px;display:inline-flex}.scene-caption:where(.astro-ttnb4mkl)>span:where(.astro-ttnb4mkl){background:#78a6aa;border-radius:50%;width:5px;height:5px}.scene-canvas:where(.astro-ttnb4mkl){width:100%;height:auto;margin-top:-2px;display:block;overflow:visible}.annotation:where(.astro-ttnb4mkl){fill:#3e6b76;letter-spacing:.04em;font-size:10px;font-weight:450}.teaching-layer:where(.astro-ttnb4mkl){opacity:0;transition:opacity .26s}.scene-camera:where(.astro-ttnb4mkl){opacity:.4;transition:opacity .26s}.robot-scene:where(.astro-ttnb4mkl)[data-mode=see] .vision-layer:where(.astro-ttnb4mkl),.robot-scene:where(.astro-ttnb4mkl)[data-mode=see] .scene-camera:where(.astro-ttnb4mkl),.robot-scene:where(.astro-ttnb4mkl)[data-mode=locate] 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button:where(.astro-ttnb4mkl):hover{color:#086e72;background:#e0edef}.scene-controls:where(.astro-ttnb4mkl) button:where(.astro-ttnb4mkl)[aria-pressed=true]{color:#066d70;background:#fff;border-color:#d9e6e9;box-shadow:0 1px 3px #193c4b0b}.scene-controls:where(.astro-ttnb4mkl) button:where(.astro-ttnb4mkl):focus-visible{outline-offset:2px;outline:2px solid #087f82}.step-number:where(.astro-ttnb4mkl){opacity:.65;font-family:SFMono-Regular,Consolas,Liberation Mono,monospace;font-size:10px;font-weight:400}.scene-explanation:where(.astro-ttnb4mkl){color:#58727e;text-align:center;letter-spacing:.015em;min-height:1.8em;margin:12px 0 0;font-size:11px;line-height:1.8}@keyframes trajectory{to{stroke-dashoffset:-66px}}@media (width<=480px){.robot-scene:where(.astro-ttnb4mkl){border-radius:15px}.scene-heading:where(.astro-ttnb4mkl){padding:17px 16px 0}.scene-title:where(.astro-ttnb4mkl){letter-spacing:0;font-size:11px}.scene-caption:where(.astro-ttnb4mkl){font-size:9px}.scene-bottom:where(.astro-ttnb4mkl){padding:7px 14px 15px}.scene-controls:where(.astro-ttnb4mkl) button:where(.astro-ttnb4mkl){gap:6px;min-height:42px;padding-inline:8px}.scene-explanation:where(.astro-ttnb4mkl){margin-top:10px;font-size:10px}}@media (prefers-reduced-motion:reduce){.teaching-layer:where(.astro-ttnb4mkl),.scene-camera:where(.astro-ttnb4mkl),.scene-controls:where(.astro-ttnb4mkl) button:where(.astro-ttnb4mkl){transition:none}.robot-scene:where(.astro-ttnb4mkl)[data-mode=act] .action-path:where(.astro-ttnb4mkl){animation:none}}:root{--ink:#142f3b;--muted:#60737d;--teal:#087b7e;--line:#dce5e8;--paper:#fff;--soft:#f4f8f9;color:var(--ink);background:var(--paper);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft 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