@font-face{font-family:RoomSerif;src:local('Baskerville'),local('Iowan Old Style'),local('Georgia');font-display:swap}*{box-sizing:border-box}html,body{margin:0;width:100%;height:100%;overflow:hidden}body{background:#211b19;color:#f0e4cf;font:13px Arial,'Helvetica Neue',sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font:inherit;color:inherit;cursor:pointer;background:none;border:0;padding:0;touch-action:manipulation}button,a,input{outline-offset:5px;-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid #e0b783}button:disabled{opacity:.4;cursor:default}h1,h2,h3,p{margin:0}h1,h2,h3{font-weight:400}::selection{background:#9b6362;color:#fff}[hidden]{display:none!important}.skip-link{position:fixed;top:-80px;left:20px;padding:12px;background:#e5c7a2;color:#241916;z-index:40}.skip-link:focus{top:15px}#room-app{position:relative;width:100%;height:100dvh;min-height:520px;isolation:isolate;background:radial-gradient(ellipse at 53% 52%,#6a4b36 0%,#3a2b23 42%,#211b19 80%)}#room-stage{position:absolute;inset:0;z-index:0;touch-action:none}#room-stage canvas{width:100%;height:100%;display:block}.room-vignette{position:absolute;inset:0;pointer-events:none;z-index:1;background:linear-gradient(0deg,#211b19e6,transparent 25%,transparent 83%,#211b1980),radial-gradient(ellipse at center,transparent 55%,#17121025);box-shadow:inset 0 0 150px #1a11091a}.header{position:absolute;left:38px;right:38px;top:24px;display:flex;align-items:center;justify-content:space-between;z-index:5;pointer-events:none}.header button{pointer-events:auto}.brand{display:flex;gap:26px;align-items:center;text-align:left}.brand-mark{font:italic 45px/1 RoomSerif,Georgia,serif;letter-spacing:-6px;position:relative}.brand-mark>span{font-family:Arial;font-size:22px;position:absolute;right:-15px;top:-4px;color:#d5a780}.brand>span:last-child{font-size:10px;letter-spacing:2.4px}.brand small{display:block;font-size:7px;letter-spacing:1.6px;color:#aa9380;margin-top:7px}.header-actions{display:flex;align-items:center;gap:23px;font-size:11px}.header-link{color:#d5c1aa}.header-divider{height:15px;width:1px;background:#a1856a45}#language{font-size:10px;letter-spacing:.5px}#language span{color:#a48b77;margin-left:5px}.help-button{height:26px;width:26px;border:1px solid #b69b7355;border-radius:50%;font-size:12px;color:#c4a889}.room-intro{position:absolute;top:129px;left:48px;z-index:2;pointer-events:none;max-width:270px}.eyebrow{font-size:7px;letter-spacing:1.65px;display:flex;align-items:center;gap:7px;color:#bea38a;line-height:1.7}.room-dot{height:4px;width:4px;background:#c99d6e;box-shadow:0 0 8px #cf996566;border-radius:50%}h1{font:42px/.99 RoomSerif,Georgia,serif;letter-spacing:-1.6px;margin-top:20px}h1 em{font-weight:400;color:#d3a28d}.room-intro p{font-size:10px;color:#bda590;line-height:1.85;max-width:203px;margin-top:20px}.room-note{position:absolute;right:40px;top:134px;text-align:right;z-index:2;pointer-events:none;color:#c5a98c;font:italic 16px/1.3 RoomSerif,Georgia,serif}.note-star{display:block;color:#bd8a64;font-size:25px;font-style:normal;margin-bottom:13px}.room-note small{display:block;font:9px Arial,sans-serif;color:#927c67;margin-top:7px}.hotspots{position:absolute;inset:0;z-index:3;pointer-events:none}.hotspot{position:absolute;left:-200px;top:-200px;transform:translate(-50%,-50%);pointer-events:auto;display:flex;align-items:center;gap:8px;white-space:nowrap;filter:drop-shadow(0 2px 6px #100b0970);transition:opacity .2s,filter .2s}.hotspot-dot{width:23px;height:23px;display:grid;place-items:center;background:#ebd4b8;color:#3b2d25;border:1px solid #fff4d880;box-shadow:0 0 0 5px #f5d9ad15;border-radius:50%;font:9px 'Courier New',monospace;transition:transform .2s,background .2s}.hotspot-label{font-size:9px;padding:7px 10px;background:#2a1b17df;border:1px solid #dbb98f2b;border-radius:3px;color:#ead6ba;opacity:0;transform:translateX(-4px);transition:opacity .2s,transform .2s;position:absolute;left:31px;backdrop-filter:blur(8px)}.hotspot:hover .hotspot-label,.hotspot:focus-visible .hotspot-label,.hotspot.is-hovered .hotspot-label{opacity:1;transform:translateX(0)}.hotspot:hover .hotspot-dot,.hotspot.is-hovered .hotspot-dot{transform:scale(1.15);background:#fff0d5}.hotspot:after{content:"";position:absolute;inset:-10px}.room-footer{position:absolute;left:38px;right:38px;bottom:19px;z-index:5;pointer-events:none}.explore-hint{display:flex;align-items:center;justify-content:center;gap:10px;color:#c1a789;font-size:8px;letter-spacing:1.5px;margin-bottom:17px}.explore-hint svg{color:#bc9973}.room-count{display:none}.bottom-bar{display:flex;align-items:center;justify-content:center;gap:20px;pointer-events:none}.object-nav{display:flex;gap:3px;padding:7px;border:1px solid #ae8c653b;background:#271b16c9;backdrop-filter:blur(18px);border-radius:12px;box-shadow:0 10px 30px #130a0750;pointer-events:auto}.object-button{position:relative;display:flex;align-items:center;gap:10px;padding:12px 17px;border-radius:7px;color:#cdb497;transition:background .2s,color .2s}.object-button:hover,.object-button.active{background:#ad795b2b;color:#f4dbb9}.object-icon{width:23px;height:23px;display:block;flex-shrink:0}.object-icon svg{width:100%;height:100%;stroke-width:1.35}.object-name{font-size:10px;letter-spacing:.2px}.object-number{display:none;font:8px monospace;color:#af896b}.camera-controls{display:flex;align-items:center;padding:8px 6px;background:#271b16a8;border:1px solid #ae8c652e;border-radius:10px;backdrop-filter:blur(12px);pointer-events:auto}.camera-controls button{height:34px;min-width:31px;display:grid;place-items:center;font-size:20px;color:#c4a685}.camera-controls button:hover{color:#fff0d5}.camera-controls>span{width:1px;height:17px;background:#9d795b33;margin:0 4px}.camera-controls #pause{font-size:13px;min-width:27px}.reset-button{margin:0 3px}.footer-meta{display:flex;justify-content:space-between;align-items:center;color:#8c745f;font-size:6px;letter-spacing:1.25px;margin-top:20px}.footer-meta>span:last-child{font:8px RoomSerif,Georgia,serif;font-style:italic;letter-spacing:1px}.loading{position:absolute;left:50%;top:48%;transform:translate(-50%,-50%);z-index:8;display:flex;align-items:center;gap:17px;background:#2a211be8;border:1px solid #b68c5d2e;padding:20px 25px;font-size:12px;color:#d9bb97;border-radius:6px}.loading-orbit{height:23px;width:23px;border:1px solid #bc96744d;border-top-color:#e6c498;border-radius:50%;animation:spin 1.2s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.scene-status{position:absolute;left:50%;top:47%;transform:translate(-50%,-50%);padding:30px;color:#d7c0a1;max-width:440px;line-height:1.8;text-align:center}.story-dialog{position:fixed;left:auto;right:23px;top:23px;bottom:23px;margin:0;width:465px;max-width:calc(100vw - 46px);height:calc(100dvh - 46px);max-height:none;overflow-y:auto;padding:0;border:1px solid #c0a27c40;border-radius:8px;background:#f0e5d2;color:#382a24;box-shadow:-15px 20px 80px #140c0744;scrollbar-width:thin;scrollbar-color:#b9a283 transparent}.story-dialog::backdrop{background:#160e0b14}.drawer-top{display:flex;justify-content:space-between;align-items:center;padding:23px 30px 20px;border-bottom:1px solid #b5a08744;position:sticky;top:0;background:#f0e5d2f5;z-index:2;backdrop-filter:blur(8px)}#drawer-index{font:9px monospace;letter-spacing:1px;color:#967557}#close-story{display:flex;align-items:center;gap:17px;font-size:9px;color:#81634c}#close-story>span:last-child{font-size:24px;line-height:1}.story-content-inner{padding:29px 30px 36px}.story-kicker{font-size:8px;letter-spacing:1.5px;text-transform:uppercase;color:#977355;line-height:1.8}.story-icon-large{width:45px;height:45px;color:#7b3e45;margin:20px 0 16px}.story-icon-large svg{width:100%;height:100%}.story-dialog h2{font:39px/1.06 RoomSerif,Georgia,serif;letter-spacing:-1px;margin:14px 0 18px}.story-lede{font:italic 19px/1.4 RoomSerif,Georgia,serif;color:#8a5b4b;margin-bottom:23px}.story-body{font-size:12px;line-height:1.85;color:#7d6755;margin-top:16px}.story-facts{display:flex;gap:20px;padding:21px 0;margin:24px 0;border-block:1px solid #b9a48b55}.story-fact{flex:1}.story-fact strong{display:block;font:28px RoomSerif,Georgia,serif;color:#6c3540}.story-fact span{display:block;font-size:9px;line-height:1.7;color:#8a715a;margin-top:6px}.story-subtitle{font:22px RoomSerif,Georgia,serif;margin:29px 0 17px;letter-spacing:-.3px}.archive-card{display:block;border:1px solid #c9b499;padding:18px;background:#e4d4bc66;margin-top:16px}.archive-card>span{display:flex;align-items:center;justify-content:space-between;font-size:11px;color:#734934;gap:15px}.archive-card small{display:block;font-size:10px;color:#957b60;line-height:1.8;margin-top:9px}.archive-card:hover{background:#dfc7a955}.material-note{font-size:10px;color:#9f876d;line-height:1.7;margin-top:16px}.video-entry{border:1px solid #c3ab8a55;margin-top:15px;background:#241b16}.video-entry video,.video-entry iframe{display:block;width:100%;aspect-ratio:16/9;border:0}.video-entry h3{padding:14px 16px;font-size:11px;color:#dfc7a3;line-height:1.6}.paper-link{display:flex;justify-content:space-between;align-items:center;background:#6b333d;color:#f1dfc2;padding:16px;font-size:11px;margin-top:23px}.physics-controls{padding:20px;background:#e1d2b9;border:1px solid #cbb396;margin:24px 0}.physics-controls label{display:flex;justify-content:space-between;align-items:center;font-size:10px;color:#7a5d46;margin-bottom:14px}.physics-controls output{font-family:monospace;color:#6d3540}.physics-controls input{accent-color:#793a42;width:100%;margin:0 0 20px;cursor:pointer}.release-button{background:#763943;color:#f5e2c7;padding:13px 15px;width:100%;font-size:11px;display:flex;align-items:center;justify-content:space-between}.physics-note{font-size:9px;line-height:1.7;margin-top:11px;color:#8c7157}.physics-readout{font:10px monospace;color:#6e3d3a;padding:12px 0 0;min-height:24px}.activity-row{border-top:1px solid #bda88b55;padding:0}.activity-row summary{display:flex;justify-content:space-between;gap:15px;font-size:11px;line-height:1.6;padding:15px 0;cursor:pointer;list-style:none}.activity-row summary::-webkit-details-marker{display:none}.activity-row summary:after{content:'+';color:#977250;flex-shrink:0}.activity-row[open] summary:after{content:'−'}.activity-row p{font-size:11px;line-height:1.85;color:#8b715a;padding-bottom:18px}.honor-row{border-top:1px solid #bda88b55;padding:19px 0}.honor-row small{font:8px monospace;color:#a27f5d;display:block;margin-bottom:9px}.honor-row h3{font:21px/1.2 RoomSerif,Georgia,serif}.honor-row p{font-size:10px;line-height:1.8;color:#917457;margin-top:9px}.drawer-bottom{padding:21px 30px;border-top:1px solid #b5a08744;display:flex;align-items:center;justify-content:space-between;gap:20px}.drawer-bottom>span{font-size:7px;letter-spacing:1.2px;color:#9f8264}#next-object{font-size:10px;display:flex;align-items:center;gap:20px;color:#6d3c37}#next-object>span:last-child{font-size:22px}.about-portrait{width:100%;max-height:310px;object-fit:cover;margin:14px 0}.help-list{padding-left:17px;font-size:12px;line-height:2;color:#856b53;margin:20px 0}.object-index{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:22px}.index-item{padding:17px;border:1px solid #b79d7c55;display:flex;align-items:center;gap:12px;text-align:left}.index-item:hover{background:#ddc7a85e}.index-item .object-name{font-size:11px}.toast{position:fixed;left:50%;bottom:125px;transform:translateX(-50%);z-index:30;background:#e8cfae;color:#492d20;max-width:85vw;font-size:11px;line-height:1.7;padding:13px 20px;box-shadow:0 3px 25px #190c0944;border-radius:4px}.noscript-note{position:absolute;left:25%;right:25%;top:45%;background:#f3e4c9;color:#4d3123;padding:30px;line-height:2}.noscript-note a{text-decoration:underline}body.panel-open .room-intro,body.panel-open .room-note,body.panel-open .hotspots{opacity:0;pointer-events:none}body.panel-open .hotspot{pointer-events:none}body.panel-open .object-nav,body.panel-open .camera-controls{opacity:.4}.room-intro,.room-note,.hotspots{transition:opacity .3s}html[lang=zh-CN] h1{font-size:35px;line-height:1.2;letter-spacing:-1px}html[lang=zh-CN] h1 em{font-style:normal}html[lang=zh-CN] .story-dialog h2{font-size:32px;line-height:1.25}html[lang=zh-CN] .story-lede{font-style:normal;font-size:17px;line-height:1.6}
@media(min-width:1600px){.room-intro{top:160px;left:65px}h1{font-size:52px}.room-intro p{font-size:12px;max-width:235px}.header{left:55px;right:55px;top:32px}.room-footer{left:55px;right:55px;bottom:25px}.object-button{padding:15px 22px}.object-name{font-size:12px}}
@media(max-width:1150px){.room-intro{left:30px;top:119px;max-width:210px}h1{font-size:34px}.room-intro p{font-size:9px;max-width:180px}.eyebrow{font-size:6px;letter-spacing:1.1px}.room-note{right:30px;top:120px;font-size:14px}.header{left:28px;right:28px}.room-footer{left:22px;right:22px}.bottom-bar{gap:12px}.object-button{padding:11px 12px;gap:7px}.object-icon{width:21px;height:21px}.object-name{font-size:9px}.camera-controls button{min-width:26px}.camera-controls #pause{min-width:22px}}
@media(max-width:850px){.room-note{display:none}.object-button{padding:12px 14px;flex-direction:column;gap:7px}.object-icon{width:22px;height:22px}.object-name{font-size:8px}.camera-controls{flex-wrap:wrap;width:95px;justify-content:center;gap:0;padding:4px}.camera-controls button{width:27px;height:30px}.camera-controls>span{display:none}#pause{display:none}.story-dialog{width:410px}.room-intro{top:110px}.explore-hint{font-size:7px}}
@media(max-width:600px){#room-app{min-height:580px}.header{left:22px;right:22px;top:20px}.brand{gap:23px}.brand-mark{font-size:39px}.brand-mark>span{font-size:19px;right:-12px}.brand>span:last-child{font-size:9px;letter-spacing:1.6px}.brand small{font-size:6px;letter-spacing:1.2px}.header-actions{gap:14px}.header-link,.header-divider{display:none}#language{font-size:9px}.help-button{width:24px;height:24px}.room-intro{left:24px;right:24px;top:96px;max-width:none}.room-intro .eyebrow{font-size:6px;letter-spacing:1.1px}h1{font-size:33px;line-height:1.05;letter-spacing:-.8px;margin-top:12px}h1 br{display:none}h1 em{margin-left:6px}.room-intro p{font-size:9px;max-width:250px;line-height:1.6;margin-top:10px}.room-footer{left:15px;right:15px;bottom:15px}.explore-hint{font-size:6px;letter-spacing:1px;margin-bottom:13px}.explore-hint svg{width:11px;height:15px}.bottom-bar{flex-direction:column;gap:10px}.object-nav{width:100%;justify-content:space-between;padding:6px 3px;border-radius:10px;gap:0}.object-button{padding:8px 7px;gap:7px;flex:1}.object-icon{width:23px;height:23px}.object-name{font-size:7px;letter-spacing:0;white-space:nowrap}.object-number{display:none}.camera-controls{width:auto;flex-wrap:nowrap;padding:2px 7px;gap:4px;border-radius:7px}.camera-controls button{min-width:28px;height:27px;font-size:18px}.camera-controls>span{display:block;height:12px}.camera-controls #pause{display:grid;min-width:25px;font-size:12px}.footer-meta{margin-top:14px;font-size:5px;letter-spacing:.7px}.footer-meta>span:nth-child(2){display:none}.footer-meta>span:last-child{font-size:6px}.hotspot-dot{width:22px;height:22px;font-size:8px;box-shadow:0 0 0 4px #f5d9ad15}.hotspot-label{display:none}.story-dialog{left:0;right:0;bottom:0;top:auto;width:100%;max-width:none;height:56dvh;max-height:75dvh;border-radius:17px 17px 0 0;border-bottom:0;box-shadow:0 -10px 50px #140c0744}.story-dialog:before{content:'';position:absolute;top:7px;left:calc(50% - 16px);width:32px;height:3px;border-radius:4px;background:#bca484;z-index:3}.drawer-top{padding:22px 24px 15px}.story-content-inner{padding:22px 24px 28px}.story-dialog h2{font-size:33px;margin-top:10px}.story-icon-large{display:none}.story-lede{font-size:18px}.story-body{font-size:11px}.drawer-bottom{padding:18px 24px}.toast{bottom:190px;font-size:10px}.room-vignette{background:linear-gradient(0deg,#211b19ed,transparent 32%,transparent 80%,#211b1955)}html[lang=zh-CN] h1{font-size:27px}html[lang=zh-CN] .room-intro p{max-width:245px;font-size:9px}html[lang=zh-CN] .object-name{font-size:8px}html[lang=zh-CN] .story-dialog h2{font-size:28px}body.panel-open .header{opacity:.4}}
@media(max-height:650px) and (min-width:601px){.room-intro{top:98px}h1{font-size:30px}.room-intro p{display:none}.room-note{top:100px}.room-footer{bottom:12px}.footer-meta{margin-top:12px}.object-button{padding:9px 12px}.header{top:18px}}
.room-intro p{max-width:155px}
@media(min-width:601px) and (max-width:1000px){.room-intro{top:91px}.room-intro p{display:none}.room-intro h1{font-size:30px;margin-top:13px}}
@media(max-width:600px){.room-intro p{max-width:250px}html[lang=zh-CN] h1 br{display:block}html[lang=zh-CN] h1 em{margin-left:0}}
@media(max-height:550px){#room-app{min-height:0}.room-intro,.room-note,.explore-hint,.footer-meta{display:none}.header{top:12px}.room-footer{bottom:10px}.bottom-bar{flex-direction:row;gap:10px}.object-nav{width:auto;flex:1;justify-content:center}.object-button{padding:7px 12px}.object-name{display:none}.camera-controls{padding:3px}.story-dialog{max-height:calc(100dvh - 24px)}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;animation:none!important}}
.video-library{margin-top:15px}.video-library .video-entry{margin-top:0}.video-entry video{object-fit:contain;background:#100d0b}.video-caption{padding:14px 16px 16px}.video-caption h3{padding:0;overflow-wrap:anywhere}.video-source{display:inline-block;margin-top:10px;font-size:9px;color:#bca68a;text-decoration:underline;text-underline-offset:3px}.video-source:hover{color:#f4e1c2}.playlist-heading{display:flex;justify-content:space-between;gap:15px;padding:17px 1px 10px;color:#967457;font-size:9px;letter-spacing:.3px}.playlist-heading>span:last-child{font-family:monospace}.video-playlist{display:grid;gap:6px;max-height:280px;overflow-y:auto;padding:2px 6px 3px 2px;margin:0 -6px 0 -2px;scrollbar-width:thin;scrollbar-color:#b9a283 transparent}.playlist-item{display:grid;grid-template-columns:83px 1fr 17px;gap:12px;align-items:center;min-width:0;padding:7px;text-align:left;border:1px solid #bca28244;background:#e7d9c455;transition:background .15s,border-color .15s}.playlist-item:hover{background:#ddc8aa70;border-color:#b89a76}.playlist-item[aria-pressed=true]{background:#d8bda36b;border-color:#8e5857}.playlist-item:focus-visible{outline-offset:-2px}.playlist-thumb{display:block;position:relative;width:83px;aspect-ratio:16/9;overflow:hidden;background:#352821;color:#dac3a0}.playlist-thumb img{display:block;width:100%;height:100%;object-fit:cover}.playlist-thumb small{position:absolute;right:3px;bottom:3px;padding:2px 4px;background:#201711d9;color:#f2e1c8;font:8px monospace;border-radius:2px}.playlist-play{display:grid;place-items:center;width:100%;height:100%;font-size:20px}.playlist-title{font-size:10px;line-height:1.6;color:#80614b;overflow-wrap:anywhere}.playlist-item[aria-pressed=true] .playlist-title{color:#66333d}.playlist-number{align-self:start;padding-top:3px;font:8px monospace;color:#a1876b}.playlist-item[aria-pressed=true] .playlist-number{color:#793a42}
.video-entry.is-portrait video{aspect-ratio:4/5;max-height:360px;object-fit:contain}