:root{color-scheme:dark;--ice:#c7f2ff;--text:#f0f8fa;--muted:#b8c9cf;--line:#c5e9ef3b;--panel:#365464f4;--panel-raised:#436473f5;--control-height:clamp(50px,3.2vw,68px);font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif}*{box-sizing:border-box}html,body{margin:0;width:100%;height:100%;overflow:hidden;background:#c8d9e6;color:var(--text)}button,input,select,summary{font:inherit}button,summary{-webkit-tap-highlight-color:transparent;cursor:pointer}button{border:0;color:inherit;background:transparent}button:hover,summary:hover{color:#e6f9ff}button:focus-visible,summary:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid #b9efff;outline-offset:4px}[hidden]{display:none!important}#app,#scene{position:absolute;inset:0}canvas{display:block;touch-action:none}
.vignette{position:absolute;inset:0;pointer-events:none;background:none}header{position:absolute;top:3.5%;left:3%;right:3%;height:clamp(74px,5.7vw,104px);display:flex;align-items:flex-start;justify-content:space-between;pointer-events:none;z-index:3}
.brand{pointer-events:auto;display:block;text-decoration:none;color:#30485a;font-size:clamp(21px,1.55vw,33px);font-weight:600;letter-spacing:4px}
.brand small{display:block;font-size:clamp(8px,.52vw,12px);letter-spacing:4px;margin-top:3px;font-weight:500;color:#567385}
.heading{position:absolute;left:50%;transform:translateX(-50%);text-align:center;white-space:nowrap}
.heading h1{color:#30485a;font-size:clamp(25px,2.05vw,46px);font-weight:500;letter-spacing:.18em;text-indent:.18em;margin:0 0 7px}
.heading h1 b{font-weight:400;color:#567385}
.heading p{font-size:clamp(10px,.68vw,16px);letter-spacing:.14em;color:#567385;margin:0}
.status{display:flex;gap:11px;margin-top:7px;color:#567385;font-size:clamp(10px,.65vw,15px);white-space:nowrap;opacity:1}
.status span+span{border-left:1px solid #56738540;padding-left:12px}
.status strong{font-size:clamp(14px,1vw,22px);color:#30485a;font-weight:400;margin-right:3px}
footer{position:absolute;bottom:5%;left:3%;right:3%;height:var(--control-height);display:flex;align-items:center;justify-content:space-between;z-index:6;pointer-events:none}footer>*{pointer-events:auto}
.helper{font-size:clamp(11px,.7vw,16px);color:#315364;letter-spacing:.35px;pointer-events:none;opacity:.88}
.toolbar{position:absolute;left:50%;transform:translateX(-50%);display:flex;align-items:center;gap:2px;height:var(--control-height);padding:4px 6px;background:#425c69e8;border:1px solid #c1d8dd2b;backdrop-filter:blur(10px);border-radius:5px;box-shadow:0 8px 26px #1627312b}
.toolbar button,.popover>summary{padding:8px clamp(10px,.8vw,18px);font-size:clamp(13px,.82vw,20px);white-space:nowrap;color:#d4e0e4;min-height:38px}
.toolbar button[aria-pressed=true]{color:#effcff;background:#78b7cb26;box-shadow:inset 0 -1px #b2e9f0}
.mode-switch{height:100%;align-items:stretch;display:flex;gap:2px;background:#2c424d96;padding:2px;border-radius:3px}
.mode-switch button{border-radius:3px;min-height:36px;padding:7px clamp(12px,.9vw,22px)}
.separator{height:18px;width:1px;background:var(--line);margin:0 4px}
.popover{position:relative}
.popover>summary{display:flex;align-items:center}
.popover summary{list-style:none}
.popover summary::-webkit-details-marker,.directory summary::-webkit-details-marker{display:none}
.popover summary span{margin-left:6px;color:#c1e9f4}
.more-actions{position:absolute;bottom:calc(100% + 12px);right:-6px;width:clamp(175px,12vw,270px);display:flex;flex-direction:column;padding:6px;background:var(--panel-raised);backdrop-filter:blur(10px);border:1px solid var(--line);border-radius:5px;box-shadow:0 12px 36px #16273155}
.more-actions button{text-align:left;border-radius:3px;display:flex;justify-content:space-between}
.more-actions button:hover{background:#b6e5f01c}
.more-actions small{font-size:11px;color:#bfced3}
.directory{margin-left:auto;position:relative}
.directory>summary{list-style:none;border:1px solid #c1d8dd2b;background:#425c69e8;border-radius:5px;height:var(--control-height);display:flex;align-items:center;padding:10px clamp(15px,1.1vw,25px);font-size:clamp(13px,.82vw,20px);color:#e1ebed;white-space:nowrap}
.directory>summary span{margin-left:12px;color:#c1e9f4}
.directory-panel{position:absolute;bottom:calc(100% + 12px);right:0;width:min(clamp(620px,39vw,940px),90vw);max-height:65vh;overflow-y:auto;background:var(--panel-raised);backdrop-filter:blur(10px);border:1px solid var(--line);border-radius:6px;padding:18px;box-shadow:0 12px 50px #16273166}
.directory-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}
.directory-heading h2{font-size:clamp(18px,1.2vw,29px);letter-spacing:2px;font-weight:400;margin:0}
.directory-heading button{font-size:25px;padding:0 7px;color:#c8d7dc}
.spatial-index{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.spatial-index button{display:flex;align-items:center;gap:12px;text-align:left;font-size:clamp(15px,.96vw,24px);line-height:1.6;padding:11px 12px;border:1px solid transparent;border-radius:4px;color:#d7e2e5}
.spatial-index button span{font-size:12px;color:#b5c7cd;min-width:18px}
.spatial-index button:hover{background:#d0edf018}
.spatial-index button.active{border-color:#b9e8f055;background:#c4edf021;color:#f0fcff}
.details{position:absolute;right:3%;top:18%;bottom:12%;width:clamp(360px,27vw,760px);z-index:4;display:flex;flex-direction:column;background:var(--panel);border:1px solid #c7f2ff52;border-radius:7px;backdrop-filter:blur(10px);box-shadow:0 15px 65px #16273166,inset 0 1px #d6f8ff24;overflow:hidden;animation:panelIn .35s ease both}
.details-heading{flex:none;padding:clamp(20px,1.2vw,36px) clamp(20px,1.2vw,36px) 0}
.details-scroll{min-height:0;flex:1;overflow-y:auto;overscroll-behavior:contain;padding:0 clamp(20px,1.2vw,36px);scrollbar-width:thin;scrollbar-color:#8db1bd transparent}
.panel-top{display:flex;justify-content:space-between;align-items:center;color:#c3d1d6;font-size:clamp(11px,.7vw,16px);letter-spacing:1.5px;margin-bottom:8px}
.panel-top button{font-size:24px;line-height:28px;min-width:32px;min-height:32px;color:#d5e0e4}
.panel-top .return-campus-view{font-size:clamp(11px,.7vw,18px);line-height:1.4;min-width:0;min-height:32px;padding:4px 0 4px 12px;letter-spacing:.06em;color:#d7e8ec}
.details h2{margin:0 0 10px;font-size:clamp(23px,1.45vw,40px);font-weight:500;line-height:1.4;letter-spacing:1px}
.scenario{font-size:clamp(14px,.86vw,22px);line-height:1.75;color:#d0dce0;margin:0 0 15px}
.levels{display:flex;gap:0;border-bottom:1px solid var(--line);margin-bottom:14px}
.levels button{flex:1;font-size:clamp(14px,.9vw,24px);white-space:nowrap;padding:10px 0;color:#bac9ce;border-bottom:2px solid transparent}
.levels button.active{color:#f0fcff;border-bottom-color:#b5eaf5}
.playback-title{display:flex;align-items:center;justify-content:space-between;font-size:clamp(16px,1vw,26px);color:#e9f5f7}
.playback-title button{font-size:clamp(14px,.9vw,23px);background:#d2eef018;border:1px solid #c2e5eb47;border-radius:4px;padding:7px 17px;min-width:70px;color:#edf9fb}
.playback-title button:hover{background:#d2eef035}#modelPlayback{padding-top:15px}#modelCanvas{width:100%;height:clamp(190px,10vw,285px);margin:10px 0 9px}
.playback-readout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,auto);align-items:baseline;gap:10px;font-size:clamp(12px,.82vw,20px);color:#cbdade;line-height:1.45}
.playback-readout span{min-width:0;overflow-wrap:anywhere}.playback-readout strong{display:flex;min-width:0;max-width:min(62%,340px);align-items:baseline;justify-content:flex-end;flex-wrap:wrap;column-gap:6px;text-align:right;color:#f3fdff;font-size:clamp(18px,1.25vw,32px);font-weight:500;line-height:1.18}.playback-readout #modelValueNumber{white-space:nowrap;overflow-wrap:normal}.playback-readout #modelValueUnit{font-size:.62em;font-weight:500;color:#c3e2ea;overflow-wrap:anywhere}
.scrub-label,.condition-label{display:flex;align-items:center;gap:13px;color:#d0dce0;font-size:clamp(13px,.86vw,22px);margin-top:16px}
.scrub-label input{min-width:0;flex:1;accent-color:#b8edf7}
.condition-label select{min-width:0;width:0;flex:1;background:#334b57;border:1px solid #a9c6cd66;border-radius:3px;color:#eef7f8;padding:9px;font-size:clamp(13px,.86vw,22px)}
.playback-note{font-size:clamp(12px,.75vw,18px);line-height:1.7;color:#bdcdd2;margin:12px 0 0}
.model-disclosure{margin:18px 0 16px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.model-disclosure summary{padding:13px 0;color:#dce6e9;font-size:clamp(14px,.9vw,24px);list-style:none;display:flex;align-items:center;gap:10px}
.model-disclosure summary:before{content:'＋';color:#c2edf5}
.model-disclosure[open] summary:before{content:'−'}
.model-disclosure summary small{font-size:clamp(12px,.75vw,18px);margin-left:auto;color:#bcccd1}#detailContent h3{font-size:clamp(14px,.9vw,24px);font-weight:500;margin:10px 0 9px;color:#e0eaed}#detailContent p{font-size:clamp(14px,.9vw,24px);line-height:1.85;color:#c9d7dc;margin:0 0 16px}
.formula{font-family:Georgia,serif;color:#e4f5f8!important;overflow-wrap:anywhere;background:#d8f3f013;padding:15px;border-left:1px solid #c4edf566}
.model-note{font-size:clamp(12px,.78vw,20px)!important;color:#b4c5cb!important}
.experiment{border-bottom:1px solid var(--line);padding:0 0 5px;margin-bottom:12px}
.panel-pagination{flex:none;display:flex;justify-content:space-between;align-items:center;margin:0;padding:12px clamp(20px,1.2vw,36px) clamp(16px,1vw,25px);border-top:1px solid #c7f2ff2b;background:#304d5bb8;color:#c6d7dc;font-size:clamp(12px,.8vw,20px)}
.panel-pagination button{padding:8px 0;font-size:clamp(14px,.9vw,24px);color:#e5f3f6}
.panel-pagination span{color:#b4c5cb}
#selectionLabel{position:absolute;pointer-events:none;z-index:2;transform:translate(-50%,-100%);padding:10px 14px;border-left:1px solid #c2edf5;background:linear-gradient(90deg,#405965ee,#40596522);max-width:300px;white-space:nowrap}#selectionName{font-size:clamp(15px,1vw,25px);font-weight:400;letter-spacing:1px;color:#f0fbfd}#tourStatus{position:absolute;left:3%;bottom:17%;width:200px;color:#30485a;font-size:13px;padding:10px 0;border-bottom:1px solid #56738560}#tourStatus strong{float:right;font-size:12px;font-weight:400}#tourProgress{position:absolute;bottom:-1px;height:1px;background:#37818c;width:0}
.footnote{position:absolute;bottom:1.6%;left:50%;transform:translateX(-50%);font-size:11px;color:#315364;white-space:nowrap}#toast{position:absolute;bottom:17%;left:50%;transform:translateX(-50%);padding:12px 20px;background:#425c69f2;border:1px solid var(--line);border-radius:4px;z-index:10;font-size:13px;white-space:nowrap}#loading,#fallback{position:absolute;inset:0;z-index:15;background:#c8d9e6;color:#30485a;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:25px}#loading p{font-size:14px;letter-spacing:3px;color:#567385}
.loader{width:42px;height:42px;border-radius:50%;border:1px solid #77919b;border-top-color:#37818c;animation:spin 1.4s linear infinite}#fallback p{line-height:1.8;color:#567385}#fallback button{padding:12px 25px;border:1px solid #567385}
.selected .vignette{background:none}
.touring .details{animation:none}
.welcome .helper,.welcome .footnote{opacity:0}
.welcome footer{opacity:.65;transition:opacity .3s}
.welcome footer:hover,.welcome footer:focus-within{opacity:1}
.clean header,.clean .helper,.clean .footnote{opacity:0;pointer-events:none}
.clean footer{opacity:0;transition:opacity .25s}
.clean footer:hover,.clean footer:focus-within{opacity:1}
.clean footer:has(details[open]){opacity:1}
@keyframes panelIn{from{opacity:0;transform:translateX(12px)}to{opacity:1;transform:translateX(0)}}
@keyframes spin{to{transform:rotate(360deg)}}
@media(min-width:2400px){.panel-top button{font-size:32px;min-width:46px;min-height:46px}
.panel-top .return-campus-view{font-size:22px;min-width:0;padding-left:20px}
.details .levels{margin-bottom:26px}
.spatial-index button{padding:15px}
.footnote{font-size:16px}}
@media(max-width:1250px){:root{--control-height:54px}
.helper{display:none}
.status{font-size:11px;gap:10px}
.status strong{font-size:17px}
.status span+span{padding-left:12px}
.brand{font-size:25px}
.heading h1{font-size:29px}
.details{width:355px;top:19%;bottom:16%}
.details-heading{padding:18px 20px 0}.details-scroll{padding:0 20px}.panel-pagination{padding:11px 20px 15px}
.details h2{font-size:23px}
.toolbar{left:0;transform:none}
.toolbar button,.popover>summary{font-size:15px;padding:8px 12px}}
@media(max-width:700px){:root{--control-height:50px}header{top:3%;left:5%;right:5%;height:135px}
.brand{font-size:23px;letter-spacing:3px}
.brand small{font-size:8px;letter-spacing:4px}
.status{font-size:11px;gap:9px;margin-top:3px}
.status strong{font-size:17px}
.status span+span{padding-left:9px}
.heading{top:61px;width:100%}
.heading h1{font-size:24px;letter-spacing:2px;margin-bottom:10px}
.heading p{font-size:11px;letter-spacing:1px}
.vignette{background:none}footer{bottom:4%;left:4%;right:4%;height:96px;align-items:flex-end}
.toolbar{bottom:0;left:50%;transform:translateX(-50%);width:max-content;gap:2px;padding:6px}
.toolbar button,.popover>summary{padding:8px 8px;font-size:12px;min-height:36px}
.mode-switch button{padding:6px 10px;min-height:32px}
.separator{margin:0 3px}
.directory{position:absolute;bottom:63px;right:0}
.directory>summary{font-size:13px;height:40px;padding:9px 13px}
.directory-panel{width:92vw;max-height:60vh;bottom:calc(100% + 12px);padding:15px}
.spatial-index{grid-template-columns:1fr}
.spatial-index button{font-size:14px;padding:10px}
.details{left:4%;right:4%;top:auto;bottom:calc(4% + 119px);width:auto;height:44%}
.details-heading{padding:15px 18px 0}.details-scroll{padding:0 18px}.panel-pagination{padding:9px 18px 12px}
.details h2{font-size:22px}#modelCanvas{height:158px}
.panel-top{margin-bottom:5px}
.scenario{font-size:13px;margin-bottom:10px}
.levels{margin-bottom:15px}
.levels button{font-size:13px;padding:11px 0}
.more-actions{right:0;width:160px}
.playback-note{font-size:11px}
.footnote{bottom:1%;font-size:10px}
.selected .vignette{background:none}#selectionName{font-size:14px}#selectionLabel{max-width:85vw}#toast{max-width:90vw;white-space:normal;bottom:21%;font-size:12px}#tourStatus{top:23%;bottom:auto;width:175px}}
@media(max-height:600px) and (min-width:701px){header{top:3%;height:75px}
.heading h1{font-size:27px}
.heading p{font-size:12px}
.details{top:23%;bottom:18%}
.toolbar button,.popover>summary{padding:6px 9px;min-height:32px}
.helper{display:none}footer{bottom:4%}}
.viewpoints{position:absolute;left:3%;top:17%;display:flex;gap:5px;align-items:center;color:#294a61;font-size:clamp(12px,.72vw,20px);z-index:3}
.viewpoints>span{font-size:clamp(10px,.57vw,18px);letter-spacing:2px;margin-right:10px}
.viewpoints button{border:1px solid rgba(255,255,255,.58);background:rgba(239,248,255,.60);color:#294a61;border-radius:4px;padding:7px 13px;cursor:pointer;box-shadow:0 2px 8px #24435409}
.viewpoints button:hover,.viewpoints button:focus-visible{background:#f7fcff;border-color:#8dcced}
.viewpoints button[aria-pressed=true]{background:#f3fcff;border-color:#4aadc9;color:#126d8b}
.selected .viewpoints,.clean .viewpoints{display:none}
.welcome .viewpoints{opacity:.65}
@media(max-width:700px){.viewpoints{top:190px;left:5%;right:5%;flex-wrap:wrap;font-size:11px}.viewpoints>span{display:none}.viewpoints button{padding:6px 10px}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* Account access lives beside the existing model playback. */
.playback-access{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:12px;line-height:1.65;color:#c2d7df;border-top:1px solid #8ca8b132;padding-top:10px}.playback-access a{color:#d4f5fa;text-underline-offset:4px;white-space:nowrap}.playback-access a:focus-visible{outline:2px solid #a5e4ee;outline-offset:4px} @media(min-width:2400px){.playback-access{font-size:18px}}