/* B / tactile laboratory. Shared type, spacing and alignment for the approved direction. */
body[data-style=b]{
 --paper:#121b17;--surface:#19251f;--ink:#edf1ed;--muted:#a9b9ae;--line:#35483c;--accent:#e5af7f;--tint:#24342b;--green:#a8c8b0;
 --sans:"Noto Sans SC","Microsoft YaHei","PingFang SC","Segoe UI",sans-serif;
 --serif:var(--sans);--mono:"Cascadia Mono",Consolas,"Noto Sans SC","Microsoft YaHei",monospace;
 --math:"Cambria Math","STIX Two Math",Georgia,"Noto Sans SC",serif;
 font:400 1rem/1.8 var(--sans);letter-spacing:0;font-optical-sizing:auto;
}
body[data-style=b] *{scroll-margin-top:120px}
body[data-style=b] button,body[data-style=b] input,body[data-style=b] select{font-family:var(--sans)}
body[data-style=b] a,body[data-style=b] button,body[data-style=b] summary{touch-action:manipulation}
body[data-style=b] button:active{filter:brightness(1.14)}
body[data-style=b] :focus-visible{outline:2px solid var(--accent);outline-offset:4px;border-radius:4px}
body[data-style=b] .site-header{position:sticky;top:0;z-index:20;height:auto;min-height:80px;max-width:none;padding:12px max(32px,calc((100vw - 1280px)/2));gap:35px;background:rgba(18,27,23,.94);backdrop-filter:blur(18px);border-color:var(--line)}
body[data-style=b] .brand{font-size:16px;font-weight:600;letter-spacing:.025em;gap:12px;white-space:nowrap;min-height:44px}
body[data-style=b] .brand-mark{width:36px;height:36px;font:500 24px var(--sans);border-radius:11px;background:var(--accent);color:var(--paper)}
body[data-style=b] .brand small{font:10px/1.6 var(--mono);letter-spacing:.13em;color:var(--muted)}
body[data-style=b] .top-nav{align-items:center;gap:23px;font-size:13px;white-space:nowrap}
body[data-style=b] .top-nav>a{display:inline-flex;align-items:center;justify-content:center;min-height:44px;color:var(--muted);transition:color .16s ease}
body[data-style=b] .top-nav>a:hover{color:var(--ink)}
.edition-chip{font:11px var(--sans);padding:7px 12px;border:1px solid var(--line);border-radius:999px;white-space:nowrap;color:var(--green);display:inline-flex;align-items:center;gap:8px}.edition-chip:before{content:'';width:5px;height:5px;background:var(--green);border-radius:50%}
body[data-style=b] main{max-width:1376px;padding:0 48px;margin:auto}
body[data-style=b] .issue-line{font:11px/1.7 var(--sans);letter-spacing:.02em;padding:22px 0;color:var(--muted);align-items:center}
body[data-style=b] .issue-line>span:first-child{font-family:var(--mono);font-size:10px;letter-spacing:.1em}
body[data-style=b] .eyebrow{font:500 11px/1.7 var(--sans);letter-spacing:.07em;color:var(--muted)}
body[data-style=b] .experiment-intro{grid-template-columns:1.05fr 1fr;gap:80px;align-items:center;padding:26px 0 35px}
body[data-style=b] .experiment-intro h1{font:600 clamp(2.75rem,4.2vw,3.5rem)/1.24 var(--sans)!important;letter-spacing:-.035em;margin:14px 0 0!important}
body[data-style=b] .experiment-intro h1 em{font-family:var(--sans);font-style:normal;font-weight:600}
body[data-style=b] .experiment-counter{font:500 12px/1.8 var(--sans);letter-spacing:.04em}
body[data-style=b] .experiment-invite p{font-size:15px;line-height:1.95;max-width:475px;margin-top:14px;color:var(--muted)}
body[data-style=b] .text-link{display:inline-flex;min-height:44px;align-items:center;font-size:13px;margin-top:22px;gap:16px;padding:8px 0;border-color:var(--line)}
body[data-style=b] .experiment-invite .text-link{border:1px solid var(--accent);border-radius:999px;background:var(--accent);color:var(--paper);padding:8px 18px;font-weight:500}
body[data-style=b] .section{padding:72px 0;border-color:var(--line)}
body[data-style=b] .lab-section{padding:28px 0 72px;border-top:0}
body[data-style=b] .section-heading{gap:40px;margin-bottom:30px;align-items:end}
body[data-style=b] .section-heading h2,body[data-style=b] .lab-section>.section-heading h2{font:600 28px/1.5 var(--sans);letter-spacing:-.025em;margin-top:10px}
body[data-style=b] .section-heading>p{font-size:13px;line-height:1.9;max-width:380px;color:var(--muted)}
body[data-style=b] .experiment-observe{grid-template-columns:72px minmax(0,1fr) auto;gap:20px;align-items:center;padding:18px 22px;margin:0 0 20px;background:#203027;border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:0 8px 8px 0}
body[data-style=b] .experiment-observe>span{font:500 12px var(--sans);color:var(--accent)}
body[data-style=b] .experiment-observe p{font-size:13px;line-height:1.9}
body[data-style=b] .experiment-observe>a{font-size:12px;display:inline-flex;min-height:40px;align-items:center}
body[data-style=b] .lab-afterword{display:grid;grid-template-columns:85px minmax(0,1fr) auto;gap:20px;align-items:start;margin-top:24px;padding:18px 0;font-size:12px}
body[data-style=b] .lab-afterword p{font-size:13px;line-height:1.9;max-width:none;margin:0}
body[data-style=b] .lab-afterword>a{font-size:12px;min-height:40px;display:inline-flex;align-items:center;border:0}
body[data-style=b] .equation-banner{padding:32px;gap:45px;border:1px solid var(--line);border-radius:12px;background:var(--surface);grid-template-columns:.85fr 1.5fr}
body[data-style=b] .principal-equation{font:44px var(--math);font-variant-numeric:tabular-nums}
body[data-style=b] .equation-banner b{font-size:15px;font-weight:600}
body[data-style=b] .equation-banner p{font-size:14px;line-height:1.9}
body[data-style=b] .equation-banner code{font:14px/1.8 var(--mono)}
body[data-style=b] .equation-banner small{font-size:12px;line-height:1.8}
body[data-style=b] .parameter-legend{font-size:12px;gap:15px 28px;padding-block:18px 22px}
body[data-style=b] .mechanism-table-wrap,body[data-style=b] .spec-table-wrap{border:1px solid var(--line);border-radius:10px;overflow:auto;background:var(--surface)}
body[data-style=b] .mechanism-table,body[data-style=b] .spec-table,body[data-style=b] .vendor-table{font-size:13px;line-height:1.85;min-width:760px;text-align:center;width:100%;font-variant-numeric:tabular-nums}
body[data-style=b] table th,body[data-style=b] table td{vertical-align:middle;text-align:center;padding:22px 24px;border-color:var(--line);font-size:13px;line-height:1.9}
body[data-style=b] table th p,body[data-style=b] table td p,body[data-style=b] table td small,body[data-style=b] table th small{font-size:13px;line-height:1.85;text-align:center;color:var(--muted)}
body[data-style=b] table thead{background:#23372b}
body[data-style=b] table thead th{font-weight:600;color:var(--ink);font-size:13px;padding-block:17px}
body[data-style=b] table tbody th{font-weight:500;color:var(--ink)}
body[data-style=b] table tbody tr:last-child>*{border-bottom:0}
body[data-style=b] .mechanism-table tbody th{width:22%}
body[data-style=b] .mechanism-table code{font:13px/1.9 var(--mono);color:var(--accent);margin-bottom:10px;white-space:normal;text-align:center}
body[data-style=b] .mechanism-table tbody th b{font-size:14px;font-weight:600}
body[data-style=b] .spec-table caption{font-size:12px;text-align:left;padding:18px 24px;color:var(--muted);caption-side:top}
body[data-style=b] .spec-table tbody th{width:130px}
body[data-style=b] .spec-table tbody td:nth-child(2){width:34%;color:var(--ink)}
body[data-style=b] .table-scroll-hint{display:none;font-size:12px;color:var(--muted);margin:0 0 12px}
body[data-style=b] .real-scan{padding:30px;gap:34px;background:var(--surface);border-radius:12px;grid-template-columns:.9fr 1.4fr;margin:32px 0}
body[data-style=b] .real-scan h3{font-size:21px;font-weight:600;line-height:1.55}
body[data-style=b] .real-scan p{font-size:13px;line-height:1.9}
body[data-style=b] .real-scan .scan-coupling,body[data-style=b] .real-scan figcaption{font-size:12px;line-height:1.85}
body[data-style=b] .real-scan img{border-radius:6px}
body[data-style=b] .physics-detail{padding:20px 24px;border-radius:10px;font-size:14px;background:#17231c}
body[data-style=b] .physics-detail summary{font-size:13px;min-height:32px;align-content:center}
body[data-style=b] .physics-detail-grid{gap:28px 40px}
body[data-style=b] .physics-detail h3{font-size:15px;font-weight:600}
body[data-style=b] .physics-detail p,body[data-style=b] .physics-detail code{font-size:13px;line-height:1.9}
body[data-style=b] .source-inline{font-size:12px;line-height:1.9;margin-top:20px}
body[data-style=b] .experiment-specimen{grid-template-columns:.8fr 1.3fr;gap:56px;padding:72px 0}
body[data-style=b] .experiment-specimen h2{font:600 32px/1.5 var(--sans);letter-spacing:-.025em;margin:14px 0 22px}
body[data-style=b] .intro,body[data-style=b] .experiment-task{font-size:14px;line-height:1.95;max-width:440px}
body[data-style=b] .specimen{border:1px solid var(--line);border-radius:12px;background:var(--surface);width:100%}
body[data-style=b] .specimen-top{padding:18px 20px;border-bottom:1px solid var(--line)}
body[data-style=b] .specimen-top>span{font:11px var(--mono)}
body[data-style=b] .view-tabs{gap:4px}
body[data-style=b] .view-tabs button{font-size:12px;min-height:40px;padding:7px 10px;border:1px solid transparent;border-radius:6px}
body[data-style=b] .view-tabs button.active{border-color:var(--line);background:var(--tint);color:var(--ink)}
body[data-style=b] .stage-shell{height:440px}
body[data-style=b] .stage-caption{font-size:12px;line-height:1.8;padding:16px 20px;align-items:center}
body[data-style=b] .plain-button{font-size:12px;min-height:40px;padding:5px 8px}
body[data-style=b] .stage-controls{padding:20px;gap:20px;flex-wrap:wrap}
body[data-style=b] .explode-control label,body[data-style=b] .explode-control output,body[data-style=b] .control-label{font-size:12px}
body[data-style=b] .force-tabs button{font-size:12px;padding:7px 11px;min-height:40px;border-radius:6px}
body[data-style=b] .play-button{font-size:12px;min-height:40px;padding:8px 14px}
body[data-style=b] .cad-hint,body[data-style=b] .stage-status{font-size:12px;line-height:1.8}
body[data-style=b] .original-caption{font-size:12px;line-height:1.8}
body[data-style=b] .parts-layout{gap:50px;grid-template-columns:1fr 1.15fr}
body[data-style=b] .layer-list button{padding:18px 14px;grid-template-columns:28px 1fr 1.05fr 14px;gap:12px;min-height:72px}
body[data-style=b] .layer-list button>span{font-size:12px}
body[data-style=b] .layer-list button b{font-size:14px;font-weight:500}
body[data-style=b] .layer-list button small{font-size:12px;line-height:1.7}
body[data-style=b] .detail-index{font-size:11px;letter-spacing:.04em}
body[data-style=b] .layer-detail h3{font-size:24px;font-weight:600;line-height:1.55}
body[data-style=b] .layer-detail>p,body[data-style=b] .reading-note{font-size:14px;line-height:1.9}
body[data-style=b] .detail-spec{gap:15px;padding-block:18px}
body[data-style=b] .detail-spec b{font:500 26px var(--mono);font-variant-numeric:tabular-nums}
body[data-style=b] .detail-spec span,body[data-style=b] .detail-spec small{font-size:12px}
body[data-style=b] .signal-chain{padding:28px;gap:17px;background:var(--surface);border-radius:12px}
body[data-style=b] .signal-chain h3{font-size:16px;font-weight:600}
body[data-style=b] .signal-chain p{font-size:13px;line-height:1.8}
body[data-style=b] .signal-chain>div>span{font-size:11px}
body[data-style=b] .method-note{gap:35px;line-height:1.9;margin:28px 0}
body[data-style=b] .method-note b{font-size:14px;font-weight:600}
body[data-style=b] .method-note p{font-size:13px;line-height:1.9}
body[data-style=b] .calibration-equation{padding:25px 28px;border:1px solid var(--line);border-radius:10px;background:var(--surface)}
body[data-style=b] .calibration-equation>span{font-size:12px}
body[data-style=b] .calibration-equation>code{font:18px/1.9 var(--mono)}
body[data-style=b] .calibration-equation>p{font-size:13px;line-height:1.9}
body[data-style=b] .code-strip{font-size:13px;padding:18px 20px;gap:18px;background:#17221b;border-radius:6px}
body[data-style=b] .code-strip>span,body[data-style=b] .mini-note{font-size:12px;line-height:1.85}
body[data-style=b] .code-strip code{font-size:13px;line-height:1.8}
body[data-style=b] .contact-section{gap:60px}
body[data-style=b] .contact-intro h2{font-size:30px;font-weight:600;letter-spacing:-.025em;line-height:1.55}
body[data-style=b] .contact-intro p{font-size:14px;line-height:1.95;max-width:460px}
body[data-style=b] .contact-demo{background:var(--surface);border-radius:12px;padding:26px}
body[data-style=b] .contact-switch{gap:12px}
body[data-style=b] .contact-switch button{font-size:12px;min-height:44px}
body[data-style=b] .plate-label{font-size:12px}
body[data-style=b] .wrench-result{font-size:12px;padding:16px;gap:12px;border-radius:6px}
body[data-style=b] .wrench-result code{font-size:13px}
body[data-style=b] .tradeoff-grid{gap:50px;margin-bottom:36px}
body[data-style=b] .tradeoff-grid article>span{font-size:12px}
body[data-style=b] .tradeoff-grid h3{font:600 26px/1.6 var(--sans);letter-spacing:-.02em}
body[data-style=b] .tradeoff-grid p{font-size:14px;line-height:1.95}
body[data-style=b] .tradeoff-grid .small{font-size:12px;line-height:1.9}
body[data-style=b] .route-formulas{gap:20px}
body[data-style=b] .route-formulas article{padding:26px;border-radius:10px;background:var(--surface)}
body[data-style=b] .route-formulas article>span{font-size:12px}
body[data-style=b] .route-formulas h3{font:24px/1.65 var(--math);overflow-wrap:anywhere}
body[data-style=b] .route-formulas p{font-size:14px;line-height:1.9}
body[data-style=b] .route-formulas small{font-size:12px;line-height:1.9}
body[data-style=b] .evidence-grid{gap:35px}
body[data-style=b] .evidence-grid b{font-size:15px;font-weight:600}
body[data-style=b] .evidence-grid p{font-size:13px;line-height:1.9}
body[data-style=b] .evidence-grid a,body[data-style=b] .source-details{font-size:12px;line-height:1.9}
body[data-style=b] .source-details summary{min-height:40px;align-content:center}
body[data-style=b] .site-footer{max-width:1376px;padding:28px 48px 40px;font-size:12px;line-height:1.8}
body[data-style=b] .hub{padding:48px;max-width:1376px}
body[data-style=b] .hub h1{font:600 40px/1.5 var(--sans);letter-spacing:-.025em}
body[data-style=b] .hub .hub-intro{font-size:15px;line-height:1.95;max-width:850px}
body[data-style=b] .inventory-kpis{gap:35px}
body[data-style=b] .inventory-kpis b{font:500 30px var(--mono)}
body[data-style=b] .inventory-kpis span{font-size:13px}
body[data-style=b] .vendor-detail h2{font-size:26px;font-weight:600}
body[data-style=b] .vendor-detail .vendor-meta{font-size:13px}
body[data-style=b] .vendor-facts{font-size:14px;line-height:1.95;grid-template-columns:115px 1fr;gap:16px 30px}
body[data-style=b] .vendor-gaps{font-size:14px;line-height:1.9;padding:24px;border-radius:10px}
body[data-style=b] .vendor-sources,body[data-style=b] .source-list{font-size:13px;line-height:1.9}
body[data-style=b] .status-tag{font-size:11px;padding:4px 10px;border-radius:999px}
@media(max-width:1150px){body[data-style=b] .site-header{padding-inline:32px;gap:22px}body[data-style=b] .top-nav{gap:16px;font-size:12px}.edition-chip{display:none}body[data-style=b] main{padding-inline:32px}body[data-style=b] .experiment-intro{gap:45px}body[data-style=b] .real-scan{grid-template-columns:1fr}body[data-style=b] .real-scan>div{grid-template-columns:1fr 1fr}body[data-style=b] .experiment-specimen{gap:35px;grid-template-columns:.8fr 1.3fr}body[data-style=b] .stage-shell{height:410px}body[data-style=b] .specimen-top{padding:16px}body[data-style=b] .view-tabs button{font-size:11px;padding-inline:7px}body[data-style=b] .layer-list button{grid-template-columns:25px 1fr 14px}body[data-style=b] .layer-list small{display:none}body[data-style=b] .signal-chain{gap:12px;padding:22px}body[data-style=b] .section-heading>p{max-width:320px}body[data-style=b] .site-footer{padding-inline:32px}}
@media(max-width:850px){body[data-style=b] .site-header{display:grid;grid-template-columns:1fr;gap:6px;padding:12px 28px 8px}body[data-style=b] .brand{font-size:15px;min-height:40px}body[data-style=b] .top-nav{margin:0;gap:26px;overflow-x:auto;scrollbar-width:none;font-size:12px}body[data-style=b] .top-nav>a{min-height:36px;flex-shrink:0}body[data-style=b] main{padding-inline:28px}body[data-style=b] .issue-line{padding:18px 0;font-size:10px}body[data-style=b] .issue-line>span:first-child{display:none}body[data-style=b] .experiment-intro{gap:30px;padding:20px 0 25px}body[data-style=b] .experiment-intro h1{font-size:44px!important}body[data-style=b] .experiment-invite p{font-size:14px}body[data-style=b] .section{padding:56px 0}body[data-style=b] .lab-section{padding-top:22px}body[data-style=b] .section-heading{gap:28px}body[data-style=b] .section-heading h2,body[data-style=b] .lab-section>.section-heading h2{font-size:25px}body[data-style=b] .experiment-observe{grid-template-columns:60px 1fr;padding:16px 18px;gap:10px 16px}body[data-style=b] .experiment-observe>a{grid-column:2;min-height:28px}body[data-style=b] .lab-afterword{grid-template-columns:75px 1fr;gap:12px 18px}body[data-style=b] .lab-afterword>a{grid-column:2;margin:0}body[data-style=b] .equation-banner{grid-template-columns:1fr 1.4fr;gap:25px;padding:26px}body[data-style=b] .principal-equation{font-size:38px}body[data-style=b] .experiment-specimen{grid-template-columns:1fr;gap:28px}body[data-style=b] .experiment-specimen .hero-copy{display:block}body[data-style=b] .intro,body[data-style=b] .experiment-task{max-width:700px}body[data-style=b] .stage-shell{height:440px}body[data-style=b] .parts-layout{gap:30px}body[data-style=b] .contact-section{gap:35px}body[data-style=b] .contact-intro h2{font-size:26px}body[data-style=b] .contact-demo{padding:22px}body[data-style=b] .wrench-result{flex-direction:column;align-items:start}body[data-style=b] .real-scan h3{font-size:21px}body[data-style=b] .table-scroll-hint{display:block}body[data-style=b] .hub{padding:40px 28px}}
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