:root{--paper:#f0f1e9;--ink:#25331f;--muted:#69745f;--line:#c8cebf;--orange:#ed682e;--soft:#e5e9dc;--pad:clamp(20px,5.5vw,90px);font-family:"PingFang SC","Microsoft YaHei",sans-serif;font-synthesis:none;background:var(--paper);color:var(--ink)}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:25px}body{margin:0}h1,h2,h3,p{margin:0}h1,h2,h3{font-weight:500}button,input{font:inherit}button{cursor:pointer;color:inherit}a{color:inherit;text-decoration:none}svg{display:block;width:100%;height:auto}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid var(--orange);outline-offset:5px}.skip{position:fixed;left:15px;top:10px;background:var(--ink);color:white;padding:12px;z-index:20;transform:translateY(-180%)}.skip:focus{transform:none}header{display:flex;align-items:center;justify-content:space-between;gap:25px;height:84px;margin:0 var(--pad);border-bottom:1px solid var(--ink)}.brand{display:flex;align-items:center;gap:9px;font-size:22px;font-weight:600;white-space:nowrap}.brand b{font:11px ui-monospace,monospace;letter-spacing:2px;margin-left:3px}.brand-shape{font-family:Georgia,serif;font-size:32px;font-weight:700;color:var(--orange);line-height:1}.header-code{font:10px ui-monospace,monospace;letter-spacing:1px}nav{display:flex;gap:30px;font-size:14px}nav a{padding:15px 0}.intro{padding:0 var(--pad)}.title-strip{display:flex;justify-content:space-between;gap:20px;align-items:center;padding:20px 0 10px;font:10px ui-monospace,monospace;letter-spacing:1.5px}.intro-grid{display:grid;grid-template-columns:.8fr 1.4fr;align-items:center;gap:5%;padding-top:20px}.intro-copy{padding:35px 0 45px}h1{font-size:clamp(45px,5vw,80px);line-height:1.16;letter-spacing:-2px}.lead{font-size:17px;line-height:1.9;margin-top:30px}.intro-text{font-size:13px;line-height:2;color:var(--muted);margin-top:20px;max-width:350px}.black-button{display:inline-flex;align-items:center;justify-content:space-between;gap:45px;background:var(--ink);color:var(--paper);font-size:14px;border:0;padding:17px 23px;min-height:50px}.black-button span{font-size:19px}.intro-copy .black-button{margin-top:30px}.hero-drawing{position:relative;margin:25px 0 0;align-self:stretch;display:flex;flex-direction:column;justify-content:center;background-image:linear-gradient(#667a4810 1px,transparent 1px),linear-gradient(90deg,#667a4810 1px,transparent 1px);background-size:27px 27px}.drawing-label{font:10px ui-monospace,monospace;color:var(--muted);letter-spacing:1px;padding:12px}.drawing-scale{display:flex;justify-content:space-between;gap:15px;font:9px ui-monospace,monospace;padding:13px;border-top:1px solid var(--line);color:var(--muted)}.intro-bottom{margin-top:40px;border-top:1px solid var(--ink);border-bottom:1px solid var(--ink);display:flex;align-items:center;gap:15px;padding:22px 0;font-size:13px}.intro-bottom a{margin-left:auto;font-size:14px}.orange-dot{width:8px;height:8px;background:var(--orange);border-radius:50%;flex-shrink:0}.structure,.selection,.notes{padding:90px var(--pad)}.section-head{display:grid;grid-template-columns:65px 1fr auto;gap:25px;align-items:start;margin-bottom:45px}.section-number{font:16px ui-monospace,monospace;color:var(--orange);padding-top:7px}.section-head h2{font-size:clamp(30px,3.2vw,46px);line-height:1.35;letter-spacing:-1.4px}.section-head>p{font-size:12px;line-height:2;color:var(--muted);align-self:end;padding-bottom:5px}.structure-workspace{display:grid;grid-template-columns:260px 1fr;border:1px solid var(--line);background:#e7ebdf}.structure-sidebar{border-right:1px solid var(--line)}.view-options{display:flex;flex-direction:column}.view-options button{display:flex;align-items:center;gap:16px;min-height:68px;padding:18px;background:transparent;border:0;border-bottom:1px solid var(--line);text-align:left;font-size:14px}.view-options button>span{font:11px ui-monospace,monospace;color:var(--muted)}.view-options button>b{margin-left:auto;font-weight:400;font-size:20px}.view-options button[aria-pressed=true]{background:var(--ink);color:var(--paper)}.view-options button[aria-pressed=true]>span{color:#bbc5ae}.component-key{padding:35px 22px}.component-key h3{font-size:12px;font-weight:400;color:var(--muted);margin-bottom:25px}.component-key ol{list-style:none;padding:0;margin:0}.component-key li{display:flex;align-items:start;gap:15px;margin:26px 0;font-size:13px}.component-key li>b{font:12px ui-monospace,monospace;padding:4px 6px;border:1px solid var(--muted)}.component-key small{display:block;font-size:10px;margin-top:7px;color:var(--muted);line-height:1.8}.section-drawing{position:relative;padding:20px 35px 0;min-width:0;overflow:hidden}.plate-label{position:absolute;top:22px;left:25px;font:10px ui-monospace,monospace;letter-spacing:1px;color:var(--muted)}.section-drawing svg{max-height:650px}.cap,.core,.seals,.housing{transition:transform .75s cubic-bezier(.2,.7,.3,1),opacity .5s}.flow-path{opacity:0;transition:opacity .5s}.section-drawing[data-mode=exploded] .cap{transform:translateY(-140px)}.section-drawing[data-mode=exploded] .core{transform:translateY(-65px)}.section-drawing[data-mode=exploded] .seals{transform:translateY(-20px)}.section-drawing[data-mode=exploded] .housing{transform:translateY(40px)}.section-drawing[data-mode=exploded] .assembly-labels{opacity:0}.section-drawing[data-mode=flow] .flow-path{opacity:1}.section-drawing[data-mode=flow] .housing{opacity:.45}.section-drawing[data-mode=flow] .core{transform:translateY(-12px);opacity:.65}.section-drawing[data-mode=flow] .assembly-labels{opacity:0}.diagram-caption{display:flex;align-items:start;gap:30px;padding:22px 0;border-top:1px solid var(--line);font-size:12px;line-height:1.8;min-height:76px}.diagram-caption b{font-weight:500;white-space:nowrap}.diagram-caption span{color:var(--muted)}.selection{background:var(--ink);color:var(--paper)}.selection .section-head>p{color:#b9c1ad}.selection-layout{display:grid;grid-template-columns:1fr 1.1fr;gap:10%;margin-left:90px}.overline{font:10px ui-monospace,monospace;letter-spacing:2px;color:#bac4ad}.size-options{display:flex;gap:10px;margin:20px 0 38px}.size-options button{background:transparent;color:var(--paper);border:1px solid #8d9b7a;padding:18px;flex:1;text-align:left}.size-options button>b{font:27px ui-monospace,monospace;display:block;margin-bottom:12px}.size-options button>span{font-size:12px;line-height:1.8;display:block}.size-options button[aria-pressed=true]{background:var(--paper);color:var(--ink)}.size-picker>label{font-size:14px;display:flex;justify-content:space-between}.size-picker output{color:#ff8c51;font:20px ui-monospace,monospace}input[type=range]{width:100%;height:32px;margin:15px 0;accent-color:#f28e52;cursor:ew-resize}.size-picker>p{font-size:12px;line-height:1.9;color:#b9c1ad}.aperture{margin:30px 0 15px;height:60px;border:1px solid #849474;position:relative;background:repeating-linear-gradient(45deg,#45543a 0 1px,transparent 1px 8px);overflow:hidden;display:flex;justify-content:space-between;align-items:center;padding:0 15px;font:11px ui-monospace,monospace;color:var(--ink)}.aperture i{position:absolute;left:0;right:0;top:25%;height:50%;background:#ed9c6f;transition:height .2s,top .2s}.aperture>span{position:relative;z-index:1;background:var(--paper);padding:3px 6px}.size-picker .aperture-status{color:#e8b293;font-size:12px}.spec-title{padding-bottom:20px;border-bottom:1px solid #89967a;display:flex;justify-content:space-between;align-items:center;gap:15px}.spec-title h3{font-size:18px}.spec-title>span{font:8px ui-monospace,monospace;color:#b9c1ad;max-width:100px;text-align:right;line-height:1.6;letter-spacing:1px}.specification dl{margin:0}.specification dl>div{display:flex;align-items:start;justify-content:space-between;gap:20px;border-bottom:1px solid #89967a5c;padding:18px 0;font-size:12px;line-height:1.8}.specification dt{color:#b9c1ad;white-space:nowrap}.specification dd{margin:0;text-align:right}.spec-note{font-size:11px;line-height:1.9;color:#b9c1ad;margin:20px 0 25px}.specification .black-button{background:var(--paper);color:var(--ink);width:100%;border:1px solid var(--paper)}.download-status{font-size:12px;line-height:1.8;color:#e8b293;min-height:25px;margin-top:12px}.notes-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:5%;margin-left:90px;border-top:1px solid var(--line)}.notes-grid article{padding:28px 0}.notes-grid article>span{font:10px ui-monospace,monospace;color:var(--muted)}.notes-grid h3{font-size:21px;line-height:1.5;margin:25px 0 17px}.notes-grid p{font-size:13px;line-height:2;color:var(--muted)}.end-line{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-top:55px;padding-top:35px;border-top:1px solid var(--ink)}.end-line strong{font-size:clamp(25px,3vw,43px);line-height:1.5;font-weight:400;letter-spacing:-1px}.end-line a{font-size:14px;white-space:nowrap;padding:12px 0}footer{padding:25px var(--pad);background:var(--soft);display:flex;justify-content:space-between;gap:25px;font:10px/1.8 ui-monospace,monospace;color:var(--muted)}footer p{font-size:11px}
@media(max-width:1050px){.header-code{display:none}.intro-grid{grid-template-columns:.8fr 1.2fr;gap:0}h1{font-size:53px}.structure-workspace{grid-template-columns:210px 1fr}.section-drawing{padding:30px 15px 0}.component-key{padding:25px 18px}.view-options button{padding:17px 15px;gap:12px}.selection-layout{margin-left:0;gap:6%}.notes-grid{margin-left:0}.section-head{grid-template-columns:40px 1fr auto;gap:20px}.spec-title>span{display:none}}
@media(max-width:700px){:root{--pad:20px}header{height:74px;gap:16px;margin:0 18px}.brand{font-size:19px;gap:5px}.brand b{display:none}.brand-shape{font-size:28px}nav{gap:20px;font-size:14px}.title-strip{padding-top:20px;font-size:8px;letter-spacing:.5px;gap:10px}.intro-grid{display:block;padding-top:0}.intro-copy{padding:35px 0 10px}h1{font-size:48px;line-height:1.13;letter-spacing:-1.4px}.lead{font-size:15px;margin-top:25px}.intro-text{font-size:13px;margin-top:16px;max-width:100%}.intro-copy .black-button{margin-top:23px;min-height:48px}.hero-drawing{margin:25px -5px 0}.drawing-label{font-size:8px}.drawing-scale{font-size:8px;gap:8px;padding:12px 6px}.intro-bottom{margin-top:25px;flex-wrap:wrap;font-size:12px;gap:12px}.intro-bottom p{max-width:235px;line-height:1.7}.intro-bottom a{margin:0 0 0 20px;font-size:14px;padding:8px 0}.structure,.selection,.notes{padding:55px var(--pad)}.section-head{grid-template-columns:28px 1fr;gap:14px;margin-bottom:30px}.section-head h2{font-size:30px;letter-spacing:-1px}.section-head>p{grid-column:2;margin-top:6px;font-size:12px}.section-number{font-size:13px;padding-top:5px}.structure-workspace{display:block}.structure-sidebar{border-right:0}.view-options{display:grid;grid-template-columns:repeat(3,1fr)}.view-options button{padding:13px 5px;font-size:14px;min-height:58px;justify-content:center;text-align:center}.view-options button>span,.view-options button>b{display:none}.component-key{padding:22px 17px;border-bottom:1px solid var(--line)}.component-key h3{font-size:11px;margin-bottom:16px}.component-key ol{display:grid;grid-template-columns:1fr 1fr;gap:20px 12px}.component-key li{margin:0;gap:8px;font-size:12px;line-height:1.5}.component-key small{font-size:10px;margin-top:5px}.component-key li>b{font-size:10px;padding:2px 5px}.section-drawing{padding:35px 6px 0}.plate-label{font-size:8px;top:15px;left:15px}.diagram-caption{padding:18px 9px;display:block;font-size:12px;min-height:100px}.diagram-caption span{display:block;margin-top:8px}.selection-layout{display:block}.size-options{gap:8px;margin-bottom:30px}.size-options button{padding:16px 12px}.size-options button>b{font-size:24px}.size-options button>span{font-size:14px}.specification{margin-top:40px}.spec-title h3{font-size:19px}.specification dl>div{font-size:12px;gap:16px}.specification dd{max-width:150px}.notes-grid{display:block;border-top:0}.notes-grid article{border-top:1px solid var(--line);padding:25px 0}.notes-grid h3{font-size:22px;margin:18px 0 13px}.end-line{display:block;margin-top:25px;padding-top:25px}.end-line strong{font-size:25px;display:block;letter-spacing:-.5px}.end-line a{display:inline-block;margin-top:20px}footer{display:flex;flex-direction:column;gap:8px;padding:25px 20px}footer>span:last-child{display:none}}
/* The structure embed uses the original controls and SVG; the complete page keeps its layout. */
.demo-embed{min-width:0;background:var(--paper)}
.demo-embed>header,.demo-embed>footer,.demo-embed main>section:not(#structure){display:none}
.demo-embed .structure{padding:22px;max-width:1400px;margin:0 auto}
.demo-embed .section-head{grid-template-columns:1fr auto;gap:9px 24px;align-items:end;margin-bottom:19px}
.demo-embed .section-number{grid-column:1/-1;padding:0;font-size:11px;letter-spacing:1.8px}
.demo-embed .section-head h2{font-size:clamp(24px,3.2vw,34px);line-height:1.3;letter-spacing:-.7px}
.demo-embed .section-head>p{font-size:14px;line-height:1.7;margin:0;padding:0;color:var(--muted)}
.demo-embed .structure-workspace{grid-template-columns:210px minmax(0,1fr)}
.demo-embed .view-options button{min-height:60px;padding:17px 18px;font-size:14px;gap:12px}
.demo-embed .view-options button>span{font-size:11px}
.demo-embed .component-key{padding:23px 20px}
.demo-embed .component-key h3{font-size:14px;margin-bottom:21px}
.demo-embed .component-key li{font-size:14px;margin:20px 0;gap:10px}
.demo-embed .component-key li:last-child{margin-bottom:0}
.demo-embed .component-key small{font-size:12px;line-height:1.6;margin-top:5px}
.demo-embed .section-drawing{padding:25px 20px 0;background-image:linear-gradient(#667a4809 1px,transparent 1px),linear-gradient(90deg,#667a4809 1px,transparent 1px);background-size:24px 24px}
.demo-embed .plate-label{top:15px;left:20px;font-size:10px}
.demo-embed .section-drawing svg{height:380px;max-height:none}
.demo-embed .diagram-caption{font-size:14px;gap:20px;line-height:1.8;padding:17px 0;min-height:86px;background:#e7ebdf}
.demo-embed .diagram-caption b{font-weight:500}
@media(max-width:700px){
  .demo-embed .structure{padding:18px}
  .demo-embed .section-head{grid-template-columns:1fr;gap:8px;margin-bottom:17px}
  .demo-embed .section-head>p{grid-column:1;font-size:14px}
  .demo-embed .structure-workspace{display:block}
  .demo-embed .view-options{display:grid;grid-template-columns:repeat(3,minmax(0,1fr))}
  .demo-embed .view-options button{min-height:53px;padding:12px 4px;justify-content:center;font-size:14px;gap:0;white-space:nowrap}
  .demo-embed .view-options button>span,.demo-embed .view-options button>b{display:none}
  .demo-embed .component-key{padding:15px;border-bottom:1px solid var(--line)}
  .demo-embed .component-key h3,.demo-embed .component-key small{display:none}
  .demo-embed .component-key ol{grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
  .demo-embed .component-key li{margin:0;font-size:14px;gap:7px;align-items:center;line-height:1.4}
  .demo-embed .component-key li>b{font-size:10px;padding:2px 4px}
  .demo-embed .section-drawing{padding:30px 15px 0}
  .demo-embed .section-drawing svg{height:clamp(260px,65vw,350px)}
  .demo-embed .diagram-caption{display:block;min-height:110px;padding:16px 0;font-size:14px}
  .demo-embed .diagram-caption span{margin-top:6px;display:block}
}
@media(max-width:420px){
  .demo-embed .structure{padding:14px}
  .demo-embed .section-head h2{font-size:24px;letter-spacing:-1px}
  .demo-embed .section-head>p{max-width:240px}
  .demo-embed .component-key ol{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 12px}
  .demo-embed .component-key{padding:13px 14px}
  .demo-embed .section-drawing{padding:28px 12px 0}
  .demo-embed .plate-label{left:12px;font-size:9px}
  .demo-embed .section-drawing svg{height:260px}
  .demo-embed .diagram-caption{min-height:140px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}