:root{color-scheme:dark;--bg:#080d15;--panel:#0b1420;--line:#263645;--teal:#71c8c7;--gold:#ebc77e;--text:#dfebf4;--muted:#97acbe;font-family:"Microsoft YaHei","PingFang SC",sans-serif;color:var(--text);background:var(--bg)}*{box-sizing:border-box}body{margin:0}a{color:var(--teal);text-decoration:none}a:hover{color:var(--gold)}button,input,select{font:inherit}button,select{border:1px solid var(--line);background:var(--panel);color:var(--text);border-radius:6px;padding:8px 12px;cursor:pointer}button:hover,button.active,select:focus{border-color:var(--gold);color:var(--gold)}input[type=range]{accent-color:var(--gold);width:100%;cursor:pointer}input[type=checkbox]{accent-color:var(--gold)}input[type=number],input[type=search]{background:var(--panel);border:1px solid var(--line);padding:9px;color:var(--text);border-radius:6px;max-width:100%}button:focus-visible,a:focus-visible,summary:focus-visible{outline:2px solid var(--teal);outline-offset:4px}h1,h2,h3{font-family:Georgia,"SimSun",serif;font-weight:400}h1{font-size:clamp(30px,4.2vw,54px);line-height:1.4;margin:16px 0 24px}h2{font-size:28px}p{line-height:1.95}em{color:var(--gold);font-style:normal}small{color:var(--muted)}.global-nav{display:flex;align-items:center;justify-content:space-between;padding:18px max(24px,4vw);border-bottom:1px solid var(--line);min-height:83px;background:#0b1420;position:relative;z-index:1000}.site-brand{display:flex;gap:12px;align-items:center;color:var(--text);font-size:17px;font-weight:600}.site-brand>span:first-child{font-size:30px;color:var(--gold)}.site-brand small{display:block;font-size:9px;letter-spacing:2px;margin-top:4px;font-weight:400}.global-links{display:flex;align-items:center;gap:24px;font-size:13px}.global-links>a{color:var(--text)}.global-links>a[aria-current]{color:var(--gold)}.nav-dropdown summary{cursor:pointer;color:var(--text)}.nav-dropdown>div{position:absolute;top:70px;display:grid;grid-template-columns:1fr 1fr;width:330px;padding:15px;background:#0d1926;border:1px solid var(--line);border-radius:8px;box-shadow:0 14px 45px #0008;z-index:1200}.nav-dropdown a{padding:9px;color:var(--text)}#app{max-width:1480px;margin:auto;padding:48px max(24px,4vw) 80px}.eyebrow{font-size:11px;letter-spacing:2.3px;color:var(--teal);margin:0 0 8px}.hero{display:grid;grid-template-columns:1.2fr 1fr;gap:36px;align-items:center;min-height:430px}.hero-copy>p{max-width:600px;color:var(--muted);font-size:15px}.hero-actions{display:flex;gap:12px;margin:27px 0}.primary-link{display:inline-block;border:1px solid var(--gold);color:var(--gold);padding:12px 20px;border-radius:6px}.secondary-link{display:inline-block;border:1px solid var(--line);color:var(--text);padding:12px 20px;border-radius:6px}.hero-art{position:relative;height:400px;overflow:hidden}.hero-art svg{width:100%;height:100%}.hero-caption{font-size:11px;text-align:center;color:var(--muted);position:absolute;bottom:0;width:100%}.section-header{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);padding:28px 0 15px;margin-top:30px}.section-header h2{margin:0}.section-header p{font-size:12px;color:var(--muted);margin:0}.lab-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.lab-card{position:relative;display:block;padding:25px;border:1px solid var(--line);border-radius:9px;background:linear-gradient(135deg,#101d2a,#080d15);color:var(--text);min-height:230px;transition:transform .2s,border-color .2s}.lab-card:hover{transform:translateY(-3px);border-color:var(--teal);color:var(--text)}.lab-card h3{font-size:24px;margin:18px 0 10px}.lab-card p{font-size:13px;color:var(--muted);margin:0 0 16px}.card-icon{font-family:Georgia,serif;font-size:38px;color:var(--gold);float:right}.card-foot{font-size:11px;color:var(--teal);display:flex;justify-content:space-between;margin-top:20px}.course-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.course-card{border:1px solid var(--line);padding:19px;border-radius:6px;color:var(--text);display:block}.course-card span{color:var(--gold);font-size:12px}.course-card h3{font-size:19px;line-height:1.6;margin:9px 0 0}.page-lead{max-width:850px;color:var(--muted);margin-top:-8px}.breadcrumb{font-size:12px;margin-bottom:20px;color:var(--muted)}.lab-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:20px;margin:22px 0}.lab-grid>*{min-width:0}.viz-panel{background:var(--panel);border:1px solid var(--line);border-radius:9px;overflow:hidden;min-width:0}.panel-title{padding:14px 18px;font-size:12px;border-bottom:1px solid var(--line);color:var(--teal);margin:0}.scene-host{height:420px;position:relative;min-width:0;overflow:hidden;touch-action:none}.scene-host canvas{display:block;width:100%;height:100%}.plot-canvas{display:block;width:100%;height:260px}.lab-controls{padding:20px;border:1px solid var(--line);border-radius:9px;display:grid;gap:18px;align-content:start;min-width:0}.control{display:block;min-width:0;font-size:13px}.control label{display:flex;justify-content:space-between;gap:12px;margin-bottom:9px;color:var(--muted)}.control-row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.button-row,.lab-tabs{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0}.lab-tabs button{flex:1;min-width:90px}.metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:var(--line);border-top:1px solid var(--line)}.metrics>div{padding:14px;background:var(--panel);min-width:0}.metrics small{display:block;font-size:11px;line-height:1.6}.metrics strong{display:block;font-family:Georgia,"SimSun",serif;font-size:23px;font-weight:400;color:var(--gold);margin-top:7px;overflow-wrap:anywhere}.lab-copy{font-size:14px;line-height:1.95;max-width:100%;padding:10px 0}.lab-copy h2{color:var(--gold);font-size:25px;margin-top:32px}.lab-copy p{max-width:1000px}.formula{padding:15px 18px;border-left:2px solid var(--teal);background:#0b1924;font-family:Georgia,"SimSun",serif;font-size:18px;color:var(--teal);line-height:1.8;overflow:auto}.note{font-size:12px;color:var(--muted);line-height:1.85}.legend{padding:10px 16px;color:var(--muted);font-size:11px;line-height:1.8}.lab-reading-links{display:flex;gap:18px;flex-wrap:wrap;border-top:1px solid var(--line);padding:23px 0;margin-top:26px;font-size:13px}.asset-tools{display:flex;gap:14px;margin:28px 0;flex-wrap:wrap}.asset-tools input{flex:1;min-width:200px}.assets-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.asset-card{border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--panel);min-width:0}.asset-card .asset-image{width:100%;height:210px;object-fit:contain;background:#060b11;padding:8px;cursor:zoom-in}.asset-card .asset-body{padding:17px}.asset-card h3{font-size:19px;line-height:1.6;margin:0 0 10px}.asset-card p{font-size:11px;line-height:1.8;color:var(--muted);overflow-wrap:anywhere;margin:5px 0}.asset-card .asset-links{display:flex;gap:14px;font-size:11px;margin-top:12px}.asset-count{color:var(--gold);font-size:13px}.reading-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:38px}.reading-sidebar{font-size:12px;line-height:1.8;align-self:start;position:sticky;top:22px;max-height:calc(100vh - 70px);overflow:auto}.reading-sidebar a{display:block;padding:8px;border-left:2px solid transparent;color:var(--muted)}.reading-sidebar a.active{color:var(--gold);border-color:var(--gold)}.article-body{max-width:920px;line-height:2;font-size:16px;overflow-wrap:anywhere}.article-body h1{font-size:34px;color:var(--gold);line-height:1.7}.article-body h2{font-size:25px;color:var(--gold);margin-top:38px;scroll-margin-top:30px}.article-body img{display:block;max-width:100%;height:auto;max-height:640px;object-fit:contain;margin:28px auto}.article-body math{font-size:1.15em;color:var(--teal)}.article-body figure{margin:24px 0}.article-body table,.source-table{width:100%;border-collapse:collapse;font-size:13px;line-height:1.8}.article-body th,.article-body td,.source-table th,.source-table td{border:1px solid var(--line);padding:10px;text-align:left}.article-body #TOC{border:1px solid var(--line);padding:18px;margin-bottom:28px;font-size:13px}.article-body #TOC ul{padding-left:23px}.article-body pre{overflow:auto;background:var(--panel);padding:15px}.sources-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.source-card{padding:23px;border:1px solid var(--line);border-radius:8px;background:var(--panel)}.source-card h2{font-size:23px;margin-top:0;color:var(--gold)}.source-card p{font-size:13px;color:var(--muted)}.source-card a{display:inline-block;margin:7px 18px 4px 0;font-size:12px}.status-pill{display:inline-block;font-size:11px;padding:4px 9px;background:#123037;color:var(--teal);border-radius:20px}.site-footer{border-top:1px solid var(--line);padding:25px max(24px,4vw);display:flex;justify-content:space-between;gap:16px;font-size:11px;color:var(--muted);flex-wrap:wrap}.loading,.error{padding:35px;border:1px solid var(--line);border-radius:8px}.error{color:var(--gold)}.lightbox{background:#050a10ee;color:var(--text);border:1px solid var(--line);max-width:95vw;width:1000px;padding:20px;border-radius:8px}.lightbox::backdrop{background:#000b}.lightbox img{max-width:100%;max-height:75vh;display:block;margin:auto}.lightbox .lightbox-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}.lightbox p{font-size:12px;color:var(--muted);margin-bottom:0}.integrated-legacy #site-navigation{position:relative}.integrated-legacy .global-nav{font-family:"Microsoft YaHei",sans-serif}.integrated-legacy .global-nav a{font-size:13px}.integrated-legacy .global-nav .site-brand{font-size:17px}.integrated-legacy .global-links .nav-dropdown>div a{white-space:normal}
@media(max-width:1000px){.global-links{gap:15px}.global-nav{padding:15px 24px}.hero{grid-template-columns:1.3fr 1fr}.lab-cards{grid-template-columns:repeat(2,1fr)}.course-grid{grid-template-columns:repeat(3,1fr)}.assets-grid{grid-template-columns:repeat(2,1fr)}.reading-layout{grid-template-columns:190px minmax(0,1fr)}}
@media(max-width:700px){.global-nav{flex-direction:column;gap:16px;align-items:flex-start;padding:17px 20px}.global-links{width:100%;justify-content:space-between;gap:7px;font-size:11px}.site-brand{font-size:15px}.global-links>a{white-space:nowrap}.nav-dropdown>div{top:105px;left:20px;width:calc(100% - 40px)}#app{padding:30px 20px 60px}.hero{display:block;min-height:auto}.hero-art{height:280px}.hero-copy p{font-size:14px}.hero h1{font-size:32px}.hero-actions{flex-wrap:wrap}.lab-cards,.lab-grid,.sources-grid{grid-template-columns:1fr}.course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.course-card{padding:14px}.course-card h3{font-size:16px}.lab-card{min-height:210px}.section-header{display:block}.section-header p{margin-top:12px}.scene-host{height:340px}.metrics strong{font-size:19px}.metrics>div{padding:11px}.assets-grid{grid-template-columns:1fr}.reading-layout{display:block}.reading-sidebar{position:relative;max-height:165px;border:1px solid var(--line);padding:10px;margin-bottom:28px}.article-body{font-size:15px}.article-body h1{font-size:28px}.article-body h2{font-size:23px}.source-table{display:block;overflow:auto}.site-footer{padding:22px 20px}.lab-copy{font-size:14px}.formula{font-size:16px}.integrated-legacy .global-links>a,.integrated-legacy .global-links summary{font-size:11px}}

/* One shared, compact navigation for the articles and all experiments. */
.global-nav{min-height:62px;padding:10px max(24px,4vw);gap:24px}
.site-brand{gap:9px;white-space:nowrap}
.site-brand>span:first-child{font-size:26px;line-height:1}
.global-links{gap:20px;white-space:nowrap}
.nav-dropdown{position:relative}
.nav-dropdown summary{padding:8px 0}
.nav-dropdown summary.active,.nav-dropdown a[aria-current]{color:var(--gold)}
.nav-dropdown>div{top:calc(100% + 10px);right:0;width:320px;padding:10px;gap:2px}
.nav-dropdown a{border-radius:4px;line-height:1.5}
.nav-dropdown a:hover,.nav-dropdown a[aria-current]{background:#19303a}
@media(max-width:1000px){.global-nav{padding:10px 24px;gap:18px}.global-links{gap:14px}}
@media(max-width:700px){
 .global-nav{min-height:86px;padding:10px 20px;gap:7px}
 .global-links{gap:7px;font-size:11px;line-height:1.5}
 .site-brand,.integrated-legacy .global-nav .site-brand{font-size:15px}
 .site-brand>span:first-child{font-size:22px}
 .nav-dropdown{position:static}
 .nav-dropdown summary{padding:5px 0}
 .nav-dropdown>div{top:100%;left:20px;right:20px;width:auto;max-height:70vh;overflow:auto}
}

/* Text indexes: aligned rows and fine rules; image/model panels keep their own layout. */
.course-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 54px}
.course-column{min-width:0}
.course-column-head{display:grid;grid-template-columns:48px 1fr;gap:14px;padding:12px 0;color:var(--muted);font-size:12px;border-bottom:1px solid var(--line)}
.course-card{display:grid;grid-template-columns:48px minmax(0,1fr) 18px;gap:14px;align-items:center;min-height:78px;padding:16px 0;border:0;border-bottom:1px solid var(--line);border-radius:0;background:transparent}
.course-card h3{font-size:20px;line-height:1.65;margin:0}
.course-card .directory-number{font-family:Georgia,serif;font-size:18px;color:var(--muted);font-variant-numeric:tabular-nums}
.course-card .directory-arrow{font-size:19px;color:var(--muted)}
.course-card:hover,.course-card:focus-visible{color:var(--gold);background:#ffffff03}
.course-card:hover .directory-number,.course-card:hover .directory-arrow{color:var(--gold)}
.lab-cards{display:block}
.lab-card.directory-lab{display:grid;grid-template-columns:85px minmax(210px,.9fr) minmax(0,1.7fr) 20px;gap:24px;align-items:center;min-height:98px;padding:20px 0;border:0;border-bottom:1px solid var(--line);border-radius:0;background:transparent;color:var(--text);transition:background .15s}
.directory-lab h3{font-size:23px;line-height:1.5;margin:0}
.directory-lab p{font-size:14px;line-height:1.8;margin:0;color:var(--muted)}
.directory-number{font-size:12px;color:var(--muted)}
.directory-arrow{color:var(--muted)}
.lab-card.directory-lab:hover{transform:none;background:#ffffff03}
.directory-lab:hover h3,.directory-lab:hover .directory-arrow{color:var(--gold)}
.sources-grid{display:block}
.source-directory-head,.source-card.source-directory-row{display:grid;grid-template-columns:minmax(220px,1fr) minmax(0,1.6fr) 136px;gap:36px}
.source-directory-head{padding:12px 0;border-bottom:1px solid var(--line);color:var(--muted);font-size:12px}
.source-card.source-directory-row{align-items:center;padding:22px 0;border:0;border-bottom:1px solid var(--line);border-radius:0;background:transparent;min-height:104px}
.source-directory-title{min-width:0}
.source-directory-row h2{font-size:23px;line-height:1.55;margin:6px 0 0}
.source-directory-row h2 a{font-size:inherit;color:var(--text);margin:0;display:inline}
.source-directory-row h2 a:hover{color:var(--gold)}
.source-directory-row p{font-size:14px;line-height:1.8;margin:0;min-width:0}
.source-directory-actions{display:grid;gap:10px;justify-items:start}
.source-directory-actions a{font-size:13px;line-height:1.65;margin:0;padding:3px 0}
.source-index p{font-size:13px;color:var(--muted)}
.source-index>a{display:inline-block;margin:7px 22px 4px 0;font-size:13px}
@media(max-width:1000px){
 .course-grid{grid-template-columns:1fr;gap:0}
 .course-column+.course-column .course-column-head{display:none}
 .course-card{min-height:68px}
 .lab-card.directory-lab{grid-template-columns:75px minmax(0,1fr) 18px;gap:8px 20px;padding:20px 0}
 .directory-lab h3{grid-column:2}
 .directory-lab p{grid-column:2;grid-row:2}
 .directory-lab .directory-arrow{grid-column:3;grid-row:1 / 3}
 .source-directory-head,.source-card.source-directory-row{grid-template-columns:minmax(190px,1fr) minmax(0,1.5fr) 120px;gap:22px}
}
@media(max-width:700px){
 .section-header{padding-top:22px;margin-top:24px}
 .section-header h2{font-size:24px}
 .section-header>a{display:inline-block;margin-top:12px;font-size:13px}
 .course-card{grid-template-columns:32px minmax(0,1fr) 16px;gap:12px;padding:15px 0;min-height:72px}
 .course-column-head{grid-template-columns:32px 1fr;gap:12px}
 .course-card h3{font-size:18px;line-height:1.7}
 .course-card .directory-number{font-size:16px}
 .lab-card.directory-lab{grid-template-columns:minmax(0,1fr) 18px;gap:8px 16px;padding:20px 0;min-height:0}
 .directory-lab .directory-number{grid-column:1;grid-row:1}
 .directory-lab h3{grid-column:1;grid-row:2;font-size:22px}
 .directory-lab p{grid-column:1;grid-row:3;font-size:13px}
 .directory-lab .directory-arrow{grid-column:2;grid-row:1 / 4}
 .source-directory-head{display:none}
 .source-card.source-directory-row{grid-template-columns:1fr;gap:12px;padding:22px 0;min-height:0}
 .source-directory-row h2{font-size:22px;margin-top:5px}
 .source-directory-row p{font-size:13px}
 .source-directory-actions{display:flex;flex-wrap:wrap;gap:8px 24px}
 .source-directory-actions a{padding:8px 0;min-height:40px}
}

/* Mode-specific controls must honor the native hidden attribute. */
[hidden]{display:none!important}

/* Shared experiment menu: group the existing eleven entries by the same public themes. */
.global-nav .nav-dropdown>div{width:440px;grid-template-columns:1fr 1fr;gap:15px 18px;max-height:calc(100vh - 110px);overflow:auto}
.global-nav .nav-theme{min-width:0}
.global-nav .nav-theme h2{font-family:"Microsoft YaHei",sans-serif;font-size:10px;font-weight:400;color:#97acbe;margin:4px 9px 5px;letter-spacing:.5px}
.global-nav .nav-theme>a{display:block;font-size:12px;padding:7px 9px;line-height:1.5;margin:0}
@media(max-width:700px){.global-nav .nav-dropdown>div{width:auto;gap:13px 10px;max-height:70vh}.global-nav .nav-theme>a{font-size:11px;padding:7px}.global-nav .nav-theme h2{margin-left:7px;font-size:10px}}