:root{color-scheme:light;--paper:#eeefed;--ink:#172126;--muted:#687378;--line:#d4d9d7;--blue:#075da8;font-family:Arial,"Microsoft YaHei","PingFang SC",sans-serif;color:var(--ink);background:var(--paper)}
*{box-sizing:border-box}body{margin:0}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}button:disabled{cursor:wait;opacity:.45}button:focus-visible,a:focus-visible{outline:3px solid var(--blue);outline-offset:4px}a{color:inherit}button{color:inherit}[hidden]{display:none!important}#dc45-experience{max-width:1920px;margin:auto;padding:0 40px}.masthead{height:76px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{text-decoration:none;font-size:19px;font-weight:800;letter-spacing:-.8px}.brand span{font-size:11px;font-weight:500;letter-spacing:2px;margin-left:14px;border-left:1px solid #afb7b7;padding-left:14px}.series{font:10px Consolas,monospace;letter-spacing:1.8px;color:var(--muted)}i{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--blue);margin:0 10px}.experience{min-height:604px;height:clamp(604px,47vw,760px);position:relative;display:grid;grid-template-columns:340px minmax(0,1fr);padding-bottom:98px}.intro{position:relative;z-index:2;padding-top:46px;pointer-events:none}.intro a{pointer-events:auto}.eyebrow{font:10px Consolas,monospace;letter-spacing:1.6px;color:var(--blue);margin:0 0 22px}h1{font-size:clamp(38px,3.6vw,56px);font-weight:500;letter-spacing:-2px;line-height:1.23;margin:0}.subtitle{font-size:17px;font-weight:600;margin:20px 0 12px}.summary{font-size:12px;line-height:1.9;color:var(--muted);margin:0}.specs{display:grid;grid-template-columns:1.1fr 1fr;gap:21px 14px;margin:27px 0 23px;max-width:320px}.specs strong{font-size:29px;font-weight:400;letter-spacing:-1px}.specs strong span{font-size:11px;letter-spacing:0;margin-left:5px;color:var(--muted)}.specs small{display:block;font-size:10px;margin-top:5px;color:var(--muted)}.spec-link{display:inline-flex;align-items:center;gap:44px;font-size:12px;text-decoration:none;border-bottom:1px solid #9ca6a8;padding:0 0 8px}.spec-link:hover{color:var(--blue)}.source-note{font-size:9px;line-height:1.7;color:var(--muted);margin:12px 0 0}.visual{position:relative;min-width:0;isolation:isolate}.visual-heading{position:absolute;top:28px;left:25px;right:0;display:flex;align-items:center;justify-content:space-between;font:9px Consolas,monospace;letter-spacing:1px;color:var(--muted);z-index:2;pointer-events:none}#view-badge{border:1px solid #cbd1cf;padding:7px 10px;border-radius:3px;font:10px Arial,sans-serif}.watermark{position:absolute;font-size:clamp(100px,17vw,260px);font-weight:700;letter-spacing:-12px;line-height:1;color:#e0e3e0;top:19%;left:50%;transform:translateX(-50%);z-index:-1;user-select:none}.media-panel{position:absolute;inset:55px -12px 42px;display:flex;align-items:center;justify-content:center}.media-panel>img{max-width:100%;max-height:100%;object-fit:contain}.media-panel.drawing{inset:65px 0 58px}.drawing img{width:100%;border-radius:6px}model-viewer{width:100%;height:100%;--poster-color:transparent;--progress-bar-height:0;background:transparent}.poster{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:var(--paper)}.poster img{width:100%;height:100%;object-fit:contain}.poster span{position:absolute;bottom:12px;font-size:11px;background:#eeefedeb;padding:9px 15px;border-radius:4px}video{width:100%;height:100%;object-fit:contain;border-radius:5px}.view-bottom{position:absolute;bottom:8px;left:25px;right:0;display:flex;justify-content:space-between;align-items:center;gap:12px;color:var(--muted);font-size:10px}.view-bottom p{line-height:1.6;max-width:75%}#reset{background:none;border:0;font-size:18px;padding:10px 0 10px 10px;white-space:nowrap}#reset span{font-size:10px}.control-deck{position:absolute;bottom:19px;left:0;right:0;display:flex;justify-content:space-between;gap:12px;border:1px solid #ccd2d0;border-radius:6px;padding:9px;background:#f6f7f3c9}.views{display:flex;gap:4px}.views button{background:transparent;border:0;padding:15px 19px;font-size:12px;border-radius:3px;white-space:nowrap}.views button span{font:9px Consolas,monospace;color:#899397;margin-right:13px}.views button[aria-pressed=true]{background:#e0e6e6;color:var(--blue)}.views button:hover{background:#e3e8e6}.play-button{border:0;border-radius:3px;background:var(--blue);color:white;padding:14px 25px;font-size:12px;min-width:170px}.play-button:hover:not(:disabled){background:#084d86}.play-button span{font-size:9px;margin-right:9px}footer{display:flex;justify-content:space-between;align-items:center;padding:15px 0 20px;font-size:9px;color:var(--muted);border-top:1px solid var(--line)}footer i{margin-left:0;width:5px;height:5px}footer>span:last-child{font:9px Consolas,monospace;letter-spacing:1.5px}
@media(min-width:1500px){.intro{padding-top:65px}.specs{margin-top:35px;gap:28px}.summary{font-size:14px}.source-note{font-size:10px}}
@media(max-width:1000px){#dc45-experience{padding:0 24px}.experience{grid-template-columns:300px minmax(0,1fr)}.views button{padding:15px 12px}.views button span{margin-right:7px}.play-button{padding:14px 18px;min-width:150px}.visual-heading{left:10px}.view-bottom{left:10px}}
@media(max-width:720px){#dc45-experience{padding:0 18px}.masthead{height:58px}.brand{font-size:17px}.brand span{font-size:10px;margin-left:10px;padding-left:10px}.series{font-size:8px;letter-spacing:0}.series i{display:none}.experience{height:auto;min-height:0;display:flex;flex-direction:column;padding-bottom:0}.intro{padding-top:25px}.eyebrow{font-size:9px;margin-bottom:14px}h1{font-size:35px;letter-spacing:-1.5px}h1 br{display:none}.subtitle{font-size:15px;margin:12px 0 8px}.summary{font-size:11px}.summary br{display:none}.specs{max-width:none;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin:20px 0 16px}.specs strong{font-size:23px}.specs strong span{font-size:9px;margin-left:3px}.specs small{font-size:9px;line-height:1.5}.spec-link{font-size:11px;gap:20px}.source-note{margin-top:9px;font-size:9px}.source-note br{display:none}.visual{height:310px;margin-top:9px}.visual-heading{top:10px;left:0}.watermark{font-size:110px;letter-spacing:-6px;top:24%}.media-panel{inset:42px -16px 36px}.media-panel.drawing{inset:42px 0 36px}.view-bottom{bottom:0;left:0;font-size:9px}.view-bottom p{max-width:74%;margin:6px 0}.control-deck{position:relative;bottom:auto;flex-direction:column;margin:5px 0 18px;padding:6px;gap:6px}.views{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:3px}.views button{padding:13px 3px;font-size:11px;min-height:44px}.views button span{display:none}.play-button{width:100%;min-height:44px;padding:12px}footer{padding:13px 0 16px;font-size:9px}footer>span:last-child{font-size:7px;letter-spacing:.2px}}
@media(max-width:380px){.series{display:none}h1{font-size:31px}.specs{grid-template-columns:repeat(2,1fr)}.visual{height:280px}footer>span:last-child{display:none}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}
+.visual-heading{flex-wrap:wrap;gap:8px}.visual-heading #view-badge{margin-left:auto}#open-guide{pointer-events:auto;border:1px solid #075da8;border-radius:4px;background:#075da8;color:white;font-size:11px;padding:9px 12px}.module-hotspot{width:30px;height:30px;border-radius:50%;border:2px solid white;background:#075da8;color:white;font:11px Arial;box-shadow:0 2px 8px #0004;transition:opacity .2s}.module-hotspot:not([data-visible]){opacity:.25;pointer-events:none}.module-hotspot[aria-pressed=true]{background:#172126;outline:3px solid #72bcec}.module-guide{position:absolute;bottom:48px;left:12px;right:0;z-index:5;background:#f7f8f4ed;border:1px solid #ccd2d0;border-radius:5px;padding:10px 12px}.module-filters{display:flex;gap:5px}.module-filters button{background:none;border:1px solid #c7cecd;border-radius:3px;padding:7px 12px;font-size:11px}.module-filters button[aria-pressed=true]{color:white;background:#075da8;border-color:#075da8}.module-description{font-size:11px;line-height:1.6;margin:8px 0 0;color:#46555d}.guide-open .media-panel{bottom:130px}.guide-open .watermark{opacity:.35}@media(max-width:720px){.visual.guide-open{height:420px}.visual-heading{gap:4px}.visual-heading #view-number{font-size:8px}#open-guide{font-size:10px;padding:9px 7px}.module-guide{left:0;bottom:45px;padding:8px}.module-filters button{flex:1;padding:10px 4px;font-size:10px}.module-description{font-size:10px}.module-hotspot{width:25px;height:25px;font-size:10px}.guide-open .media-panel{bottom:150px;top:48px}}
.control-deck #open-guide{font-size:14px;font-weight:600;padding:13px 24px;min-height:48px;margin-left:auto;box-shadow:0 2px 6px #075da81a}.control-deck .play-button{background:transparent;color:#53626a;border:1px solid #ccd2d0;min-width:140px}.control-deck .play-button:hover:not(:disabled){background:#e0e6e6}@media(max-width:720px){.control-deck .views{grid-template-columns:repeat(2,minmax(0,1fr))}.control-deck #open-guide{width:100%;margin:0;min-height:50px;order:-1}.control-deck .play-button{min-height:40px}}
.module-hotspot{width:8px;height:8px;padding:0;border:1px solid white;box-shadow:0 0 0 2px #075da833;border-radius:50%;overflow:visible;background:#075da8}.leader-line{position:absolute;left:3px;bottom:7px;width:1px;height:var(--leader-height,48px);background:#426b86;pointer-events:none}.leader-label{position:absolute;bottom:calc(var(--leader-height,48px) + 7px);left:3px;transform:translateX(-50%);background:#f5f6f2ed;border-bottom:1px solid #426b86;padding:5px 7px;min-width:84px;color:#183b55;text-align:center;white-space:nowrap;box-shadow:none}.leader-label strong{display:block;font-size:12px;font-weight:600}.leader-label small{display:block;font-size:9px;margin-top:3px}.compact-label .leader-label{min-width:42px;padding:4px}.compact-label .leader-label small{display:none}.module-hotspot[aria-pressed=true] .leader-label{background:#075da8;color:white}.guide-open .media-panel{top:100px}.module-hotspot:not([data-visible]){opacity:0;pointer-events:none}@media(max-width:720px){.guide-open .media-panel{top:95px}.leader-label{min-width:53px;padding:4px}.leader-label strong{font-size:10px}.leader-label small{font-size:8px}.module-hotspot{width:7px;height:7px}.compact-label .leader-label{min-width:25px;padding:3px}.module-filters{gap:3px}.module-filters button{padding:10px 2px}}
@media(max-width:720px){.leader-line{height:calc(var(--leader-height) * .5)}.leader-label{bottom:calc(var(--leader-height) * .5 + 7px)}}
#dc45-experience{padding-top:22px;padding-bottom:22px}.experience{height:clamp(650px,50vw,800px);padding-bottom:110px}.control-deck{align-items:center;gap:30px;padding:17px 20px;border-radius:0;background:#f8f9f6;box-shadow:0 8px 30px #223b4810}.door-state{white-space:nowrap;font-size:14px;font-weight:600;color:#7e8d96}.door-state small{font:11px Consolas,monospace;margin-right:14px;color:#9ba8af}.door-state.is-active{color:#075da8}.control-deck #open-guide{min-width:210px;margin:0;background:#173d59;border:0;border-radius:0;box-shadow:none;font-size:15px;padding:16px 24px}.control-deck #open-guide span{font-size:21px;margin-right:6px}#door-progress{appearance:none;flex:1;min-width:60px;height:2px;background:linear-gradient(to right,#075da8 var(--progress,0%),#c8d1d6 var(--progress,0%));cursor:pointer}#door-progress::-webkit-slider-thumb{appearance:none;width:14px;height:14px;border:3px solid #f8f9f6;outline:1px solid #075da8;border-radius:50%;background:#075da8}#door-progress::-moz-range-thumb{width:9px;height:9px;border:3px solid #f8f9f6;outline:1px solid #075da8;border-radius:50%;background:#075da8}.leader-label{border:1px solid #d0dce2;border-radius:5px;background:#fffffff2;padding:7px 10px;box-shadow:0 3px 12px #183b5510;min-width:88px}.leader-label strong{letter-spacing:1.1px;color:#173d59}.leader-label small{color:#647783;line-height:1.5}.leader-line{background:#7191a4}.module-hotspot[aria-pressed=true] .leader-label strong,.module-hotspot[aria-pressed=true] .leader-label small{color:white}.module-guide{background:transparent;border:0;border-top:1px solid #d2dcdf;border-radius:0;padding:12px 0 0}.module-filters button{border-radius:20px;padding:7px 13px;background:#f7f9f7}.module-description{color:#6c7b82;font-size:10px}.guide-open .media-panel{top:100px}@media(max-width:900px){.control-deck{gap:15px}.control-deck #open-guide{min-width:170px;padding:14px}.door-state{font-size:12px}}@media(max-width:720px){#dc45-experience{padding-top:0;padding-bottom:0}.experience{height:auto;padding-bottom:0}.control-deck{display:grid;grid-template-columns:auto 1fr auto;padding:14px;gap:15px 10px}.control-deck #open-guide{grid-column:1/-1;order:initial;margin:0;min-height:48px}.door-state{font-size:11px}.door-state small{font-size:9px;margin-right:5px}#door-progress{width:100%;min-width:20px}.leader-label{min-width:55px;padding:5px}.leader-label strong{font-size:10px}.leader-label small{font-size:8px}.module-filters button{padding:8px 4px}.guide-open .media-panel{top:95px}}
.visual #model-panel{top:100px;bottom:130px}@media(max-width:720px){.visual{height:420px}.visual #model-panel{top:95px;bottom:150px}}
@media(max-width:720px){.leader-line{height:calc(var(--leader-height) * .32)}.leader-label{bottom:calc(var(--leader-height) * .32 + 7px)}}
/* Compact centered control deck and a larger, nearly frontal initial model. */
.control-deck{width:min(920px,78%);left:50%;right:auto;transform:translateX(-50%);padding:13px 16px;gap:24px}.control-deck #open-guide{min-width:180px;min-height:44px;padding:12px 18px;font-size:13px}.door-state{font-size:12px}.door-state small{font-size:10px;margin-right:10px}.visual #model-panel{top:40px;bottom:100px}.poster{background:transparent;pointer-events:none}.poster span{bottom:50%;transform:translateY(50%);font-size:11px;background:transparent}.module-filters{justify-content:center}.module-description{text-align:center}.leader-label{min-width:78px;padding:5px 8px}.leader-label strong{font-size:11px}.leader-label small{font-size:8px}@media(max-width:1000px) and (min-width:721px){.control-deck{width:94%;gap:15px}}@media(max-width:720px){.control-deck{width:100%;left:auto;right:auto;transform:none;padding:12px;gap:12px 8px}.control-deck #open-guide{min-width:0;min-height:44px}.door-state{font-size:10px}.door-state small{margin-right:4px}.visual #model-panel{top:65px;bottom:130px}.leader-label{min-width:52px;padding:4px}.leader-label strong{font-size:10px}.leader-label small{font-size:8px}}
/* Page browsing and clearer module navigation. */
h1{font-weight:700}.experience{height:clamp(600px,44vw,700px);min-height:600px;padding-bottom:96px}.module-guide{padding:6px 0 0;bottom:40px}.module-filters{gap:8px}.module-filters button{font-size:14px;min-height:44px;padding:10px 20px}.module-description{font-size:12px;line-height:1.5;margin:7px 0 0}.camera-actions{display:flex;align-items:center;gap:6px}.camera-actions>button{min-width:36px;min-height:36px;border:1px solid #ccd6db;background:#f8faf7;border-radius:4px;font-size:18px}#reset{border:0;background:transparent}.view-bottom p{max-width:65%}@media(max-width:720px){.experience{height:auto;min-height:0;padding-bottom:0}.visual,.visual.guide-open{height:370px}.module-filters{gap:4px}.module-filters button{font-size:12px;padding:10px 6px}.module-description{font-size:11px;line-height:1.5}.module-guide{bottom:45px}.view-bottom{gap:6px}.view-bottom p{max-width:53%}.camera-actions{gap:3px}.camera-actions>button{min-width:32px;min-height:36px}#reset span{display:none}.visual #model-panel{top:40px;bottom:135px}}