:root{--paper:#f5f4ef;--ink:#282b27;--muted:#76776e;--line:#dadbd2;--purple:#512c4f;--lime:#dce9aa;--white:#fffefa}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:'Avenir Next','PingFang SC','Microsoft YaHei',sans-serif;font-size:16px}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;color:inherit;cursor:pointer}button:focus-visible,a:focus-visible{outline:3px solid #886487;outline-offset:4px}button{border:0}a{color:inherit;text-decoration:none}header{height:92px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);margin:0 4vw}.brand{display:flex;gap:12px;align-items:center;font-size:23px;font-weight:650}.brand-icon{width:41px;height:41px;border-radius:50%;display:grid;place-items:center;background:var(--purple);color:var(--paper);font-size:22px}.brand small{display:block;font-size:10px;letter-spacing:1.8px;margin-top:2px;font-weight:500}.edition{font-size:14px;color:var(--muted)}.quiet{background:none;font-size:14px;padding:12px 0 12px 20px}.quiet span{margin-left:18px}.quiet.playing{color:var(--purple)}main{max-width:1800px;margin:auto;padding:38px 4vw 0}.title-row{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:30px}.eyebrow{font-family:'SFMono-Regular',Consolas,monospace;font-size:11px;letter-spacing:1.8px;color:var(--muted);margin:0 0 12px}h1{font-size:clamp(24px,2.5vw,40px);font-weight:550;letter-spacing:-1px;margin:0}.modes{display:flex;gap:5px;background:#e9e9e1;padding:5px;border-radius:40px;flex-shrink:0}.modes button{background:none;padding:12px 20px;border-radius:30px;font-size:14px;white-space:nowrap}.modes button.active{background:var(--ink);color:#fff}.modes em{font-style:normal;font-family:Georgia,serif;margin-right:6px;opacity:.6}.exhibit{display:grid;grid-template-columns:290px minmax(0,1fr);gap:28px}.story{padding:18px 16px 14px 0;display:flex;flex-direction:column;align-items:start}.chapter{font-size:11px;letter-spacing:2px;font-family:monospace;color:var(--purple);display:flex;align-items:center;gap:12px}.chapter:before{content:'';width:22px;height:1px;background:var(--purple)}h2{font-size:44px;line-height:1.22;font-weight:500;letter-spacing:-1px;margin:29px 0 18px}.story p{font-size:14px;line-height:1.9;color:var(--muted);max-width:250px}.features{width:100%;margin-top:16px;margin-bottom:30px}.features>div{display:flex;justify-content:space-between;gap:6px;padding:14px 0;border-bottom:1px solid var(--line);font-size:12px;align-items:center}.features strong{font-size:16px;font-weight:500}.features span{color:var(--muted)}.primary{background:var(--purple);color:white;border-radius:30px;padding:15px 20px;width:100%;display:flex;align-items:center;justify-content:space-between;margin-top:auto;font-size:14px}.primary:hover{background:#684365}.story 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14px;border-radius:20px;background:#fffefae8;color:#4a4d43;opacity:0;transition:opacity .2s}.visual:hover .enlarge,.visual:focus-visible .enlarge{opacity:1}.components{margin-top:30px}.section-label{display:flex;justify-content:space-between;align-items:center;font-size:14px;margin-bottom:14px}.section-label small{font-size:12px;color:var(--muted)}.part-list{display:grid;grid-template-columns:repeat(6,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.part{display:flex;align-items:center;text-align:left;gap:13px;background:none;padding:20px 12px;border-right:1px solid var(--line);transition:background .2s;min-width:0}.part:first-child{border-left:1px solid var(--line)}.part:hover{background:#ebece2}.part.selected{background:var(--lime)}.part b{font:italic 22px Georgia,serif;color:#777d68}.part span{font-size:13px;line-height:1.7}.part small{display:block;font-size:10px;color:var(--muted);letter-spacing:.4px}.detail-panel{display:grid;grid-template-columns:1.15fr 1fr;gap:7%;margin-top:30px;background:var(--white);padding:28px}.detail-panel[hidden]{display:none}.detail-photo button{position:relative;width:100%;height:370px;background:#eeeee8;padding:0}.detail-photo img{width:100%;height:100%;object-fit:contain}.detail-photo span{position:absolute;right:12px;bottom:12px;padding:8px 13px;background:#fffdf4e8;border-radius:30px;font-size:12px}.detail-copy{padding:16px 20px 16px 0}.detail-copy h2{font-size:30px;margin:10px 0 16px}.detail-copy p{font-size:14px;line-height:1.9;color:var(--muted)}dl{margin:20px 0}dl>div{display:flex;border-bottom:1px solid var(--line);padding:12px 0;font-size:13px;justify-content:space-between;gap:16px}dt{color:var(--muted)}dd{margin:0;text-align:right}.detail-copy .source{font-size:11px}footer{display:flex;justify-content:space-between;gap:20px;padding:23px 0;font-size:11px;color:var(--muted)}footer span{padding:0 8px}dialog{width:min(1300px,96vw);height:94vh;max-height:none;border:1px solid var(--line);padding:0;background:var(--paper);color:var(--ink)}dialog::backdrop{background:#222820b8;backdrop-filter:blur(9px)}.dialog-head{display:flex;align-items:center;justify-content:space-between;padding:18px 24px;border-bottom:1px solid var(--line);font-size:14px}.dialog-head div{display:flex;align-items:center;gap:25px}.dialog-head button{background:none;padding:7px}.zoom-area{height:calc(100% - 115px);overflow:auto;display:grid;place-items:center}.zoom-area img{max-width:100%;max-height:100%;object-fit:contain}dialog>p{font-size:11px;color:var(--muted);text-align:center;padding:0 15px}.stage.detail-mode .visual img{object-fit:contain}.fade-in{animation:appear .4s ease both}@keyframes appear{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}@media(min-width:1500px){.exhibit{grid-template-columns:320px minmax(0,1fr)}.visual{min-height:560px}.story h2{font-size:54px}.story p{font-size:16px}}@media(max-width:1050px){header{height:78px}.title-row{align-items:start;flex-direction:column}.exhibit{grid-template-columns:230px minmax(0,1fr);gap:20px}h2{font-size:36px}.part-list{grid-template-columns:repeat(3,1fr)}.part:nth-child(-n+3){border-bottom:1px solid var(--line)}.part:nth-child(4){border-left:1px solid var(--line)}.visual{min-height:400px}}@media(max-width:650px){header{margin:0 5vw;height:73px}.brand{font-size:20px}.brand small{font-size:8px}.edition{display:none}main{padding:26px 5vw 0}.title-row{gap:23px;margin-bottom:22px}h1{font-size:27px}.modes{width:100%;justify-content:space-between}.modes button{font-size:12px;padding:11px 10px}.modes em{margin-right:3px}.exhibit{display:flex;flex-direction:column;gap:20px}.stage{order:0}.story{order:1;padding:0;display:block}.story h2{font-size:28px;margin:15px 0 10px}.story h2 br{display:none}.story p{max-width:none;font-size:14px;margin-top:0}.features{display:flex;gap:20px;margin:8px 0 20px}.features>div{display:block;flex:1;line-height:1.8;padding:8px 0}.features strong{display:block;font-size:15px}.features span{font-size:10px;display:block}.primary{width:100%}.visual{min-height:340px}.stage-top,.stage-bottom{padding:14px;font-size:10px}.enlarge{opacity:1;font-size:10px}.part{padding:15px 8px;gap:7px}.part span{font-size:12px}.part small{font-size:9px}.part b{font-size:19px}.section-label{font-size:13px}.section-label small{font-size:10px}.detail-panel{grid-template-columns:1fr;padding:15px;gap:20px}.detail-photo button{height:300px}.detail-copy{padding:0}.detail-copy h2{font-size:25px}footer{flex-direction:column;gap:0;font-size:10px}footer p{margin:5px 0}.dialog-head{padding:12px;font-size:12px}.dialog-head div{gap:12px}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* Presentation typography */
.brand small{font-size:12px;letter-spacing:1px}.eyebrow,.chapter,.stage-top,.stage-bottom,.story .small-note,.part small,.detail-copy .source,footer,dialog>p{font-size:12px}.story p,.detail-copy p{font-size:16px}.features>div,.part span,dl>div{font-size:14px}.visual{min-height:470px;background:#f5f4ef}.stage{background:#f5f4ef}.story .small-note{line-height:1.8}.detail-copy .source{font-size:12px}.features span{font-size:12px}.story{padding-right:4px}.features strong{font-size:15px}
@media(max-width:650px){.brand small{font-size:10px}.visual{min-height:350px}.features>div{font-size:12px}.features span{font-size:12px}.part span{font-size:12px}.part small{font-size:10px}.story p{font-size:16px}.story .small-note{font-size:12px}.section-label small{font-size:12px}.stage-top,.stage-bottom{font-size:10px}.detail-copy .source{font-size:12px}footer{font-size:12px}}

html{scroll-behavior:auto;scroll-padding-top:92px}header{position:relative;z-index:5}#scroll-sequence{height:420vh;position:relative}.scroll-pin{position:sticky;top:0;height:100svh;min-height:560px;overflow:hidden;display:grid;grid-template-columns:32% 68%;align-items:center;padding:30px 4vw 68px;background:var(--paper);border-bottom:1px solid var(--line)}.scroll-copy{position:relative;z-index:2;align-self:center}.scroll-copy h1{font-size:clamp(28px,3.2vw,54px);line-height:1.3;font-weight:500;letter-spacing:-1.5px}.scroll-description{font-size:16px;line-height:1.9;color:var(--muted);max-width:320px;min-height:92px;margin-top:25px}.scroll-chapter{display:flex;align-items:center;gap:15px;margin:32px 0 24px}.scroll-chapter>span{font-family:Georgia,serif;font-style:italic;font-size:38px;color:var(--purple)}.scroll-chapter h2{font-size:23px;margin:0}.scroll-hint{font-size:14px;color:var(--ink)}.scroll-hint span{margin-left:15px;color:var(--muted)}.scroll-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;align-items:center}.scroll-actions button{background:var(--purple);color:white;padding:11px 19px;border-radius:24px;font-size:14px}.scroll-actions button+button{background:#e6e6df;color:var(--ink)}.scroll-actions a{display:block;width:100%;font-size:13px;padding:10px 0}.scroll-note{font-size:12px;color:var(--muted);margin-top:30px}.scroll-model{height:min(88svh,880px);width:100%;position:relative;align-self:center}.scroll-model canvas{width:100%;height:100%;display:block;object-fit:contain}.scroll-progress{position:absolute;bottom:28px;left:4vw;right:4vw;display:flex;align-items:center;gap:18px;font-size:13px}.progress-track{height:2px;flex:1;background:#dedfd5}.progress-track i{display:block;width:100%;height:2px;background:var(--purple);transform:scaleX(0);transform-origin:left}#scroll-percent{font:italic 22px Georgia,serif;width:54px;text-align:right}.skip-scroll{position:absolute;top:20px;right:4vw;font-size:12px;color:var(--muted)}#asset-loading{position:absolute;top:48%;text-align:center;width:100%;font-size:14px;color:var(--muted)}#asset-loading[hidden]{display:none}#reference-explorer{scroll-margin-top:30px}.scroll-model canvas:focus-visible{outline:2px solid var(--purple)}
@media(max-width:750px){#scroll-sequence{height:380vh}.scroll-pin{min-height:600px;padding:22px 5vw 55px;display:flex;flex-direction:column;align-items:stretch}.scroll-copy{width:100%;align-self:stretch;flex:none}.scroll-copy .eyebrow{font-size:10px;margin-bottom:8px}.scroll-copy h1{font-size:25px;letter-spacing:-.6px}.scroll-copy h1 br{display:none}.scroll-description{font-size:13px;line-height:1.7;min-height:42px;max-width:none;margin:10px 0 0}.scroll-chapter{position:absolute;top:116px;left:0;gap:10px;margin:0}.scroll-chapter>span{font-size:24px}.scroll-chapter h2{font-size:16px}.scroll-hint{font-size:11px;margin:10px 0 0}.scroll-hint span{margin-left:10px}.scroll-actions{position:absolute;right:0;top:104px;margin:0;gap:6px}.scroll-actions button{font-size:11px;padding:9px 13px}.scroll-actions a{display:none}.scroll-note{position:absolute;top:155px;left:0;margin:0;font-size:10px}.scroll-model{height:auto;min-height:0;width:100%;flex:1;margin-top:66px}.scroll-model canvas{height:100%;width:100%;position:absolute}.scroll-progress{bottom:20px;left:5vw;right:5vw;font-size:12px;gap:12px}.skip-scroll{display:none}}
@media(prefers-reduced-motion:reduce){.scroll-pin{scroll-behavior:auto}}

@media(max-width:750px){.scroll-hint{display:none}.scroll-chapter{top:122px}.scroll-actions{top:114px}.scroll-note{top:163px}.scroll-model{margin-top:82px}}

/* Original-photo evidence and assembly-aware presentation. */
.scroll-actions .evidence-link{display:block;width:100%;text-align:left;padding:10px 0;background:none;color:var(--purple);border-radius:0}.scroll-note{line-height:1.7}.canvas-tip{position:absolute;bottom:0;left:0;right:0;text-align:center;font-size:11px;color:var(--muted);pointer-events:none}.atlas-intro{font-size:14px;line-height:1.8;color:var(--muted);margin:0}.evidence-tabs{display:flex;gap:8px;padding:12px 0 24px;flex-wrap:wrap;border-bottom:1px solid var(--line)}.evidence-tabs button{background:none;border:1px solid var(--line);border-radius:30px;padding:12px 20px;font-size:14px}.evidence-tabs button.active{background:var(--purple);border-color:var(--purple);color:white}.evidence-summary{display:grid;grid-template-columns:1fr 1.5fr;gap:5%;margin:32px 0}.evidence-summary h2{font-size:28px;margin:12px 0}.evidence-summary p{font-size:15px;line-height:1.85;margin:0 0 10px;color:#55594c}.evidence-summary .eyebrow{font-size:11px;color:var(--muted)}.evidence-summary .photo-proof{font-size:12px;color:var(--muted)}.photo-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.photo-card{text-align:left;padding:0;background:#fffefa;border:1px solid var(--line);overflow:hidden}.photo-frame{height:270px;position:relative;background:#e9eae4;overflow:hidden}.photo-frame img{height:100%;width:100%;object-fit:contain;transition:transform .25s}.photo-card:hover img{transform:scale(1.035)}.photo-frame span{position:absolute;bottom:12px;right:12px;background:#fffefae8;padding:7px 12px;border-radius:20px;font-size:11px}.photo-meta{padding:18px 18px 8px}.photo-meta>span{font-size:15px}.photo-meta small{display:block;font:11px monospace;color:var(--muted);margin-top:8px}.photo-meta p{font-size:12px;line-height:1.8;color:var(--muted);min-height:44px}.evidence-boundary{font-size:12px;line-height:1.8;padding:24px 0;margin:0;color:var(--muted);border-bottom:1px solid var(--line)}#evidence-dialog{overflow:auto}#evidence-dialog .dialog-head{position:sticky;top:0;z-index:3;background:var(--paper)}#evidence-dialog .dialog-head>button{background:none}.evidence-dialog-body{padding:0 28px 30px}#lightbox{z-index:10}.scroll-model{height:min(91svh,980px)}
@media(max-width:750px){.scroll-actions .evidence-link{width:auto;padding:9px 8px;font-size:11px}.scroll-copy h1{font-size:27px}.scroll-note{top:160px;font-size:10px}.scroll-note br{display:none}.scroll-note br:after{content:' · '}.scroll-model{height:auto;margin-top:89px}.canvas-tip{font-size:10px;bottom:-8px}.photo-grid{grid-template-columns:1fr}.photo-frame{height:300px}.evidence-summary{grid-template-columns:1fr;gap:12px;margin:25px 0}.evidence-summary h2{font-size:24px;margin-bottom:10px}.evidence-tabs{gap:6px}.evidence-tabs button{padding:10px 13px;font-size:12px}.atlas-intro{font-size:13px}.evidence-dialog-body{padding:0 15px 20px}.evidence-summary p{font-size:14px}.title-row{gap:16px}#lightbox .dialog-head{gap:12px}#zoom-title{word-break:break-all;font-size:11px}}
@media(max-width:750px){.scroll-description{min-height:44px}.scroll-chapter{position:static;margin:12px 0 8px}.scroll-chapter h2{font-size:16px}.scroll-actions{position:static;margin:0;gap:8px;flex-wrap:nowrap}.scroll-note{position:static;margin:8px 0 0;font-size:9px;line-height:1.6}.scroll-model{margin-top:12px}.scroll-copy .eyebrow{font-size:9px;letter-spacing:1.3px}}
.reconstruction-story{padding-bottom:40px;margin-bottom:40px;border-bottom:1px solid var(--line)}.render-grid{display:grid;grid-template-columns:1.6fr 1fr;gap:24px;margin:24px 0}.render-card{padding:0;text-align:left;background:#fffefa;border:1px solid var(--line);overflow:hidden}.render-image{height:530px;padding:20px;background:var(--paper)}.render-image img{width:100%;height:100%;object-fit:contain;transition:transform .4s}.render-card:hover .render-image img{transform:scale(1.025)}.render-caption{padding:23px;border-top:1px solid var(--line)}.render-caption b{font-size:17px;font-weight:500}.render-caption p{font-size:13px;line-height:1.8;color:var(--muted);margin:10px 0}.render-caption span{font-size:12px;color:var(--purple)}.render-boundary{font-size:12px;line-height:1.9;color:var(--muted);max-width:1080px}.scroll-copy h1{letter-spacing:-1px}.scroll-note{max-width:340px}.canvas-tip{bottom:2px}
@media(max-width:750px){.render-grid{grid-template-columns:1fr;gap:18px}.render-image{height:330px;padding:10px}.exploded-card .render-image{height:470px}.render-caption{padding:18px}.render-caption b{font-size:15px}.reconstruction-story{padding-bottom:24px;margin-bottom:28px}.render-boundary{font-size:11px}.scroll-note{font-size:9px}.canvas-tip{bottom:-6px}}

.connection-controls{margin-top:18px;max-width:340px;display:grid;grid-template-columns:1fr auto;gap:10px;align-items:center}.wire-switch{grid-column:1/-1;font-size:13px;display:flex;gap:8px;align-items:center}.wire-switch input{accent-color:var(--purple);width:16px;height:16px}.connection-controls select{width:100%;min-width:0;background:#fffefa;border:1px solid var(--line);border-radius:5px;padding:10px 8px;font:12px inherit;color:var(--ink)}.connection-controls button{font-size:12px;background:none;padding:10px 0;color:var(--purple)}#connection-caption{grid-column:1/-1;margin:0;font-size:11px;line-height:1.7;color:var(--muted);min-height:38px}.scroll-note{margin-top:13px}.scroll-chapter{margin:20px 0 15px}.scroll-actions{margin-top:15px}.scroll-description{margin-top:18px;min-height:82px}.render-image canvas{width:100%;height:100%;object-fit:contain}.connections-section{padding-bottom:40px;margin-bottom:40px;border-bottom:1px solid var(--line);scroll-margin-top:30px}.connection-row{display:grid;grid-template-columns:55px 1fr auto auto;gap:24px;align-items:center;padding:22px 0;border-top:1px solid var(--line)}.connection-id{font:italic 22px Georgia,serif;color:var(--purple)}.connection-row h3{font-size:16px;font-weight:500;margin:0 0 8px}.connection-row p{font-size:13px;line-height:1.8;color:#686b61;margin:0 0 7px;max-width:830px}.connection-row small{font-size:11px;color:var(--muted)}.connection-row button{font-size:12px;background:#e8e9e0;padding:11px 14px;border-radius:24px;white-space:nowrap}.connection-row button:last-child{background:none;color:var(--purple)}.unresolved{padding:20px 24px;border-left:2px solid #b2a27a;background:#eeeee6;margin-top:18px}.unresolved b{font-size:14px;font-weight:500}.unresolved p{font-size:12px;line-height:1.9;color:#666b5d;margin:9px 0 0}.scroll-copy .scroll-note{font-size:10px}
@media(max-width:750px){.scroll-copy h1{font-size:23px}.scroll-description{font-size:12px;min-height:40px;margin-top:8px}.scroll-chapter{margin:9px 0 7px}.scroll-actions{margin-top:0}.connection-controls{max-width:none;grid-template-columns:auto minmax(0,1fr) auto;gap:5px;margin-top:9px}.wire-switch{grid-column:auto;font-size:10px;gap:3px}.wire-switch input{width:13px;height:13px}.connection-controls select{padding:7px 4px;font-size:10px}.connection-controls button{font-size:10px}#connection-caption{font-size:9px;line-height:1.5;min-height:27px}.scroll-copy .scroll-note{display:none}.scroll-model{margin-top:5px}.connection-row{grid-template-columns:35px 1fr 1fr;gap:12px;padding:18px 0}.connection-row>div{grid-column:2/-1}.connection-row button:nth-last-child(2){grid-column:2}.connection-row button{font-size:11px;padding:9px}.connection-row h3{font-size:14px}.connection-row p{font-size:12px}.connection-id{font-size:18px;align-self:start}.unresolved{padding:16px}.connection-row small{font-size:10px}}