:root{--navy-950: oklch(17% .035 255);--navy-900: oklch(21% .04 255);--ice-100: oklch(96% .015 240);--ice-300: oklch(83% .045 240);--ice-500: oklch(72% .12 245);--electric: oklch(65% .2 255);--muted: oklch(72% .025 250);--line: oklch(85% .03 245 / 18%);--glass: oklch(22% .04 255 / 72%);font-family:Avenir Next,Helvetica Neue,Noto Sans TC,PingFang TC,Microsoft JhengHei,sans-serif;color:var(--ice-100);background:var(--navy-950);font-synthesis:none}*{box-sizing:border-box}html,body,#app{width:100%;min-height:100vh;min-height:100dvh;margin:0}html,body{overflow:hidden}button,a{-webkit-tap-highlight-color:transparent;touch-action:manipulation}button{font:inherit}button,.download-button,.brand{cursor:pointer}button:focus-visible,a:focus-visible{outline:2px solid var(--ice-300);outline-offset:4px}#app{position:relative;isolation:isolate;background:radial-gradient(circle at 58% 38%,#182a43,#0b1627 45%,#08111f)}#scene{position:absolute;inset:0;z-index:0}#scene canvas{width:100%;height:100%;touch-action:none}.ambient-grid{position:absolute;inset:0;z-index:1;pointer-events:none;opacity:.17;background-image:linear-gradient(oklch(80% .04 245 / 9%) 1px,transparent 1px),linear-gradient(90deg,oklch(80% .04 245 / 9%) 1px,transparent 1px);background-size:72px 72px;mask-image:linear-gradient(to bottom,transparent,#000 48%,#000)}.topbar{position:absolute;z-index:3;top:0;left:0;width:100%;display:flex;align-items:center;justify-content:space-between;padding:30px 40px;pointer-events:none}.brand{display:flex;align-items:center;gap:12px;color:var(--ice-100);text-decoration:none;font-size:25px;line-height:1;letter-spacing:.22em;font-weight:600;pointer-events:auto}.brand-mark{width:35px;height:35px;fill:none;stroke:var(--ice-300);stroke-width:1.35}.model-badge{display:flex;align-items:center;gap:9px;padding:9px 13px;border:1px solid var(--line);border-radius:4px;background:var(--glass);backdrop-filter:blur(14px);color:var(--muted);font-size:10px;letter-spacing:.13em}.model-badge b{color:var(--ice-300);font-weight:600}.live-dot{width:5px;height:5px;border-radius:50%;background:var(--electric);box-shadow:0 0 10px var(--electric)}.intro{position:absolute;z-index:2;left:5.2vw;top:50%;transform:translateY(-51%);pointer-events:none}.eyebrow{margin:0 0 22px;color:var(--ice-500);font-size:11px;font-weight:600;letter-spacing:.24em}h1{margin:0;max-width:330px;font-size:clamp(30px,3.2vw,52px);line-height:1.18;letter-spacing:.05em;font-weight:450}.subtitle{margin:13px 0 0;color:var(--ice-300);font-size:13px;letter-spacing:.28em}.description{margin:28px 0 0;color:var(--muted);font-size:14px;line-height:1.9;letter-spacing:.04em}.specs{display:flex;gap:30px;margin-top:38px;padding-top:21px;border-top:1px solid var(--line)}.specs div{display:grid;gap:5px}.specs strong{color:var(--ice-100);font-size:17px;font-weight:500;letter-spacing:.03em}.specs span{color:var(--muted);font-size:8px;letter-spacing:.14em}.view-switcher{position:absolute;z-index:3;right:38px;top:50%;transform:translateY(-50%);display:grid;gap:7px}.control-label{margin:0 0 7px 12px;color:var(--muted);font-size:9px;letter-spacing:.2em}.view-button{min-width:98px;min-height:43px;display:flex;align-items:center;gap:14px;padding:0 14px;border:1px solid transparent;border-radius:4px;background:transparent;color:var(--muted);font-size:12px;letter-spacing:.08em;text-align:left;transition:color .18s ease,background .18s ease,border-color .18s ease}.view-button span{color:var(--ice-500);font-size:9px}.view-button:hover{color:var(--ice-100);background:#cee1f10f}.view-button.active{color:var(--ice-100);border-color:var(--line);background:var(--glass);backdrop-filter:blur(12px)}.bottom-panel{position:absolute;z-index:3;left:40px;right:40px;bottom:28px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:20px}.interaction-hint{display:flex;align-items:center;gap:9px;color:var(--muted);font-size:11px;letter-spacing:.06em}.interaction-hint svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.3;stroke-linecap:round;stroke-linejoin:round}.playback-controls{display:flex;align-items:center;gap:8px;padding:6px;border:1px solid var(--line);border-radius:7px;background:var(--glass);backdrop-filter:blur(16px);box-shadow:0 12px 35px #00000233}.icon-button{width:42px;height:42px;display:grid;place-items:center;border:0;border-radius:4px;color:var(--muted);background:transparent;transition:background .16s ease,color .16s ease}.icon-button:hover,.icon-button.active{color:var(--ice-100);background:#cee1f117}.icon-button svg{width:19px;height:19px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}.icon-button .play-icon{display:none;fill:currentColor;stroke:none}.icon-button:not(.active) .pause-icon{display:none}.icon-button:not(.active) .play-icon{display:block}.divider{width:1px;height:20px;margin:0 3px;background:var(--line)}.text-button{height:42px;display:flex;align-items:center;gap:8px;padding:0 12px;border:0;border-radius:4px;color:var(--muted);background:transparent;font-size:11px;letter-spacing:.04em;transition:color .16s ease,background .16s ease}.text-button:hover,.text-button[aria-pressed=true]{color:var(--ice-100);background:#cee1f112}.light-swatch{width:8px;height:8px;border:1px solid var(--ice-500);border-radius:50%}.text-button[aria-pressed=true] .light-swatch{background:var(--electric);box-shadow:0 0 9px var(--electric)}.download-button{justify-self:end;display:flex;align-items:center;gap:9px;min-height:44px;padding:0 16px;border:1px solid var(--line);border-radius:5px;color:var(--ice-100);background:var(--glass);backdrop-filter:blur(12px);text-decoration:none;font-size:11px;letter-spacing:.07em;transition:background .18s ease,border-color .18s ease}.download-button:hover{background:#193550d9;border-color:#92c4ee66}.download-button svg{width:16px;height:16px;fill:none;stroke:var(--ice-300);stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}.download-button span{color:var(--muted);font-size:9px}.loading-screen{position:absolute;z-index:10;inset:0;display:grid;place-items:center;overflow:hidden;background:#0a1424;transition:opacity .24s ease,visibility .24s ease}.loading-screen.done{opacity:0;visibility:hidden;pointer-events:none}.loading-poster{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;opacity:.09;filter:blur(3px)}.loading-content{position:relative;width:min(320px,75vw);text-align:center}.loading-logo{color:var(--ice-100);font-size:27px;font-weight:600;letter-spacing:.35em}.loading-content p{margin:20px 0;color:var(--ice-300);font-size:13px;letter-spacing:.08em}.progress-track{width:100%;height:2px;overflow:hidden;background:var(--line)}.progress-track span{display:block;width:8%;height:100%;background:var(--electric);box-shadow:0 0 12px var(--electric);transition:width .2s ease}#progress-text{display:block;margin-top:12px;color:var(--muted);font-size:10px;letter-spacing:.08em}.error-message{position:absolute;z-index:12;left:50%;bottom:100px;transform:translate(-50%);width:min(420px,calc(100vw - 32px));padding:18px;border:1px solid var(--line);border-radius:6px;background:var(--navy-900);text-align:center}.error-message strong,.error-message span{display:block}.error-message span{margin-top:8px;color:var(--muted);font-size:13px}#hud{display:none}@media(max-width:900px){.topbar{padding:22px 24px}.intro{left:28px;top:125px;transform:none}h1{max-width:260px;font-size:30px}.description{display:none}.specs{gap:22px;margin-top:20px;padding-top:14px}.view-switcher{right:18px}.view-button{min-width:48px;width:48px;padding:0;justify-content:center;font-size:0}.view-button span{font-size:10px}.control-label{margin-left:10px}.bottom-panel{left:24px;right:24px;grid-template-columns:1fr auto}.interaction-hint{display:none}.playback-controls{justify-self:start}}@media(max-width:600px){.topbar{padding:18px}.brand{font-size:20px;gap:8px}.brand-mark{width:29px;height:29px}.model-badge{font-size:8px;padding:8px}.model-badge b{display:none}.intro{left:20px;top:88px}.eyebrow{margin-bottom:10px;font-size:9px}h1{font-size:24px}.subtitle{margin-top:8px;font-size:9px}.specs{display:none}.view-switcher{top:46%;right:10px;gap:4px}.view-button{min-height:44px}.bottom-panel{left:12px;right:12px;bottom:max(12px,env(safe-area-inset-bottom));display:flex;justify-content:center;gap:8px}.text-button{padding:0 8px;font-size:10px}.download-button{padding:0 12px;font-size:10px}.download-button span{display:none}.icon-button{width:40px}}@media(max-height:500px)and (orientation:landscape){.topbar{padding:max(14px,env(safe-area-inset-top)) max(24px,env(safe-area-inset-right)) 14px 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