:root{--paper:#edf1f2;--ink:#213a45;--muted:#667d87;--line:#ccd8dc;--accent:#28687b;--white:#fff}*{box-sizing:border-box}html,body{margin:0;width:100%;height:100%;overflow:hidden}body{background:var(--paper);color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",sans-serif;display:flex;flex-direction:column}button{font:inherit;color:inherit;cursor:pointer;border:1px solid var(--line);background:rgba(255,255,255,.94);transition:background .18s,color .18s;min-height:44px}button:hover{background:#dde8ec}button:disabled{cursor:wait;opacity:.45}button:focus-visible{outline:3px solid var(--accent);outline-offset:4px}button[aria-pressed=true]{background:var(--ink);color:#fff;border-color:var(--ink)}.masthead{padding:28px 40px 16px;display:flex;justify-content:space-between;align-items:center;z-index:2;flex-shrink:0}.identity{display:flex;align-items:center;gap:17px}.identity>strong{font:800 46px/1 Arial,sans-serif;letter-spacing:-4px;padding-right:18px;border-right:1px solid var(--line)}h1{font-size:18px;letter-spacing:.15em;margin:0 0 6px;font-weight:500}.identity span{font-size:11px;letter-spacing:.15em;color:var(--muted)}.edition{font-size:11px;letter-spacing:.1em;display:flex;align-items:center;gap:12px}.edition i{width:6px;height:6px;border-radius:50%;background:var(--accent)}main{position:relative;flex:1;min-height:0}model-viewer{position:absolute;inset:0;width:100%;height:100%;--poster-color:transparent;--progress-bar-color:transparent;opacity:0;transition:opacity .4s}main.ready model-viewer{opacity:1}#cover{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;transition:opacity .4s}main.ready #cover{opacity:0;pointer-events:none}.stage-caption{position:absolute;top:36px;left:40px;pointer-events:none;z-index:1}.stage-caption>span{font:10px/1.4 Consolas,monospace;letter-spacing:.1em;color:var(--muted)}.stage-caption p{font-size:30px;line-height:1.6;letter-spacing:.13em;font-weight:300;margin-top:20px}.view-controls{position:absolute;left:40px;bottom:24px;display:flex;gap:0;z-index:2;box-shadow:0 4px 24px #213a4509}.view-controls button{padding:0 19px;border-right:0;font-size:12px}.view-controls button:first-child{border-radius:6px 0 0 6px}.view-controls button:last-child{border-right:1px solid var(--line);border-radius:0 6px 6px 0}.view-controls #reset{font-size:22px;display:flex;align-items:center;gap:6px}.view-controls #reset span{font-size:12px}.explore-tools{position:absolute;right:40px;bottom:24px;display:flex;gap:8px;z-index:2}.explore-tools button{padding:0 16px;font-size:12px;border-radius:6px}#loading{position:absolute;bottom:94px;left:50%;transform:translateX(-50%);width:280px;background:#ffffffee;padding:16px 20px;border:1px solid var(--line);border-radius:8px;z-index:3;box-shadow:0 6px 30px #213a4509}#loading>div:first-child{display:flex;justify-content:space-between;font-size:12px;gap:12px}.track{height:3px;background:#e3ebee;margin-top:12px;border-radius:3px;overflow:hidden}#bar{height:100%;width:0;background:var(--accent);transition:width .2s}#retry{margin-top:12px;width:100%;border-radius:4px}footer{padding:0 40px 24px;display:flex;align-items:center;gap:16px;font-size:11px;color:var(--muted);z-index:1}.gesture b{font-weight:400;padding:0 7px}#mode{padding:5px 9px;border:1px solid var(--line);border-radius:4px;font-size:10px}footer small{margin-left:auto;font-size:10px}#toast{position:fixed;left:50%;top:110px;transform:translateX(-50%);padding:12px 18px;background:var(--ink);color:white;border-radius:6px;max-width:90%;font-size:12px;opacity:0;pointer-events:none;z-index:5}#toast.show{opacity:1}.no-js{position:fixed;bottom:110px;width:100%;text-align:center}body:fullscreen{padding-top:20px}.qa{position:fixed;top:104px;right:20px;white-space:pre-wrap;font:11px/1.5 Consolas,monospace;background:#ffffffef;border:1px solid var(--line);padding:10px;max-width:340px;z-index:8} [hidden]{display:none!important}@media(max-width:700px){.masthead{padding:22px 20px 12px}.identity>strong{font-size:37px;padding-right:15px}.identity{gap:13px}h1{font-size:15px}.identity span{font-size:10px}.edition{font-size:0;gap:0}.edition i{width:7px;height:7px}.stage-caption{left:20px;top:22px}.stage-caption p{font-size:21px;line-height:1.5;margin-top:10px}.stage-caption>span{font-size:8px}.view-controls{left:20px;bottom:75px}.view-controls button{padding:0 15px;min-height:40px}.explore-tools{left:20px;right:20px;bottom:20px;gap:7px}.explore-tools button{flex:1;padding:0 8px;font-size:11px}.desktop{display:none}footer{padding:0 20px max(14px,env(safe-area-inset-bottom));flex-wrap:wrap;gap:8px;font-size:10px}footer small{width:100%;margin:0;font-size:9px}#mode{margin-left:auto}#loading{bottom:138px;width:260px}.qa{top:100px;right:10px;max-width:230px;font-size:9px}.gesture b{padding:0 4px}}@media(prefers-reduced-motion:reduce){*{transition:none!important}}
.building-pin{width:40px;height:55px;min-height:0;background:transparent url('./assets/pin.svg') center/contain no-repeat;border:0;padding:0 0 17px;transform:translateY(-27px);font:700 23px/1 Arial,sans-serif;color:#fff;filter:drop-shadow(0 2px 2px #213a4526);--min-hotspot-opacity:0}.building-pin:hover,.building-pin.selected{background:transparent url('./assets/pin.svg') center/contain no-repeat;filter:drop-shadow(0 0 4px #fff) drop-shadow(0 3px 4px #213a4566);color:#fff}.building-pin span{pointer-events:none}.hide-labels .building-pin{display:none}main:not(.ready) .building-pin{visibility:hidden}#building-focus{position:absolute;bottom:92px;left:40px;display:flex;align-items:center;gap:16px;padding:6px 8px 6px 18px;border:1px solid var(--line);background:#ffffffef;border-radius:6px;z-index:3}#building-focus strong{font-size:16px;font-weight:500}#leave-building{font-size:11px;padding:0 12px;min-height:34px;border:0;border-radius:3px;background:var(--paper)}.qa{max-height:160px;overflow:auto;font-size:9px}button.building-pin:focus-visible{outline:2px solid var(--accent);outline-offset:4px}@media(max-width:700px){.building-pin{width:28px;height:38px;padding-bottom:12px;font-size:16px;transform:translateY(-19px)}.explore-tools{gap:5px}.explore-tools button{padding:0 4px;font-size:10px}#building-focus{left:20px;bottom:124px;padding:5px 7px 5px 12px;gap:12px}#building-focus strong{font-size:14px}}