@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;500;600&family=DM+Mono&display=swap');
:root{--paper:#faf9f6;--ink:#202622;--muted:#626b65;--blue:#234fbb;--rule:#d9ddd6;--wash:#eff1eb;--serif:'Noto Serif SC','Songti SC',SimSun,serif;--sans:system-ui,-apple-system,'Microsoft YaHei',sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.85 var(--sans)}a{color:inherit;text-decoration:none}a:hover{color:var(--blue)}button,input,select{font:inherit}button,a,input,select{touch-action:manipulation}button{cursor:pointer}img{max-width:100%;height:auto}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--blue);outline-offset:5px}p{margin:0 0 1.25em}h1,h2,h3{font-family:var(--serif);font-weight:500;line-height:1.45;letter-spacing:-.025em}h1{font-size:clamp(2.35rem,5.4vw,4.8rem);margin:.35em 0 .55em}h2{font-size:clamp(1.6rem,3vw,2.35rem);margin:0 0 1rem}h3{font-size:1.3rem;margin:.4rem 0 .75rem}.shell{width:min(1240px,calc(100% - 80px));margin:auto}.site-header{border-bottom:1px solid var(--rule);padding:22px 0;background:var(--paper)}.header-row{display:flex;align-items:center;justify-content:space-between;gap:30px}.brand{font:600 25px var(--serif);letter-spacing:.1em}.brand small{display:block;font:11px/1.8 'DM Mono',monospace;letter-spacing:.13em;margin-top:5px}.main-nav{display:flex;gap:28px;align-items:center;flex-wrap:wrap}.main-nav a{font-size:15px;padding:6px 0}.main-nav a[aria-current=page]{color:var(--blue);border-bottom:2px solid}.skip{position:fixed;left:15px;top:-100px;background:white;padding:10px;z-index:1000}.skip:focus{top:10px}.eyebrow,.meta{font:13px/1.7 var(--sans);letter-spacing:.07em;color:var(--muted)}.eyebrow{color:var(--blue);text-transform:uppercase}.hero{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;padding:65px 0 60px}.hero-copy p{max-width:32em;color:var(--muted);font-size:18px}.hero h1{font-size:clamp(2.5rem,4.8vw,4.2rem)}.hero figure{margin:0}.hero figure img{height:380px;width:100%;object-fit:contain;background:#e9e9e3;padding:24px}.hero figcaption{font-size:13px;color:var(--muted);padding-top:12px}.link{color:var(--blue);text-decoration:underline;text-underline-offset:5px}.button{display:inline-block;padding:10px 20px;background:var(--blue);color:white!important;border:1px solid var(--blue);font-size:15px}.button.secondary{background:transparent;color:var(--blue)!important}.section{padding:48px 0;border-top:1px solid var(--rule)}.section-head{display:flex;justify-content:space-between;gap:24px;align-items:baseline;margin-bottom:24px}.section-head p{max-width:40em;color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}.grid.two{grid-template-columns:repeat(2,1fr)}.entry{display:block;padding:22px 0;border-top:1px solid var(--rule)}.entry p{color:var(--muted);font-size:16px;margin-bottom:12px}.entry .number{font:13px 'DM Mono',monospace;color:var(--blue)}.entry img{width:100%;height:220px;object-fit:contain;background:var(--wash);margin:12px 0}.feature-band{background:var(--ink);color:var(--paper);padding:40px;display:grid;grid-template-columns:1fr 1fr;gap:45px}.feature-band p{color:#d2d9d1}.feature-band .eyebrow{color:#aebff5}.feature-band a{color:#c3d0ff}.page-head{padding:55px 0 35px;max-width:850px}.page-head h1{font-size:clamp(2.4rem,5vw,3.8rem)}.lead{font-size:19px;color:var(--muted);line-height:1.9}.reading{width:min(760px,100%);margin:0 auto;padding:24px 0 65px;font:18px/2 var(--serif)}.reading h2{font-size:1.65rem;margin:2.3rem 0 1rem}.reading h3{margin-top:2rem}.reading a{color:var(--blue);text-decoration:underline;text-underline-offset:4px}.reading li{margin-bottom:.6rem}.reading blockquote{border-left:3px solid var(--blue);padding:5px 0 5px 24px;margin:25px 0;color:var(--muted)}.reading table{width:100%;border-collapse:collapse;font:15px/1.8 var(--sans)}td,th{padding:14px 12px;border-bottom:1px solid var(--rule);text-align:left;vertical-align:top}.reading img{display:block;margin:25px auto;max-height:550px;object-fit:contain}.note{padding:22px;background:var(--wash);font:15px/1.9 var(--sans);margin:25px 0}.breadcrumb{font-size:14px;color:var(--muted);padding-top:25px}.filters{display:flex;gap:12px;flex-wrap:wrap;margin:25px 0}.filters input{flex:1;min-width:200px}.filters input,.filters select{padding:12px 16px;border:1px solid var(--rule);background:white;color:var(--ink)}.result{display:grid;grid-template-columns:110px 1fr;gap:20px;padding:23px 0;border-bottom:1px solid var(--rule)}.result p{font-size:15px;color:var(--muted);margin:4px 0}.result h3{margin:0;font-size:1.2rem}.tags{display:flex;gap:8px;flex-wrap:wrap}.tag{font-size:13px;color:var(--blue);border:1px solid var(--rule);padding:2px 9px}.site-footer{border-top:1px solid var(--rule);padding:35px 0;margin-top:30px;font-size:14px;color:var(--muted)}.footer-row{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap}.footer-links{display:flex;gap:22px;flex-wrap:wrap}.experiment{background:var(--wash);padding:30px;margin:25px 0}.experiment canvas{display:block;width:100%;height:230px;background:white}.controls{display:flex;gap:18px;flex-wrap:wrap;align-items:center;margin-top:20px}.controls label{font-size:15px}.controls output{font-variant-numeric:tabular-nums}.empty{padding:50px 0;color:var(--muted)}.workfacts{display:grid;grid-template-columns:repeat(3,1fr);border-block:1px solid var(--rule);padding:18px 0;gap:20px}.workfacts p{margin:0;font-size:15px}.workfacts strong{display:block;color:var(--muted);font-size:13px;font-weight:400}.source-list{font:14px/1.9 var(--sans)}.route-list{counter-reset:routes}.route-list a{display:block;padding:24px 0;border-bottom:1px solid var(--rule)}.route-list a:before{counter-increment:routes;content:'0' counter(routes);font:14px 'DM Mono';color:var(--blue);margin-right:20px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}
@media(max-width:760px){.shell{width:calc(100% - 36px)}.header-row{display:block}.main-nav{gap:21px;margin-top:17px;flex-wrap:nowrap;overflow-x:auto}.main-nav a{white-space:nowrap}.hero{grid-template-columns:1fr;gap:20px;padding:35px 0}.hero figure img{height:280px}.grid,.grid.two{grid-template-columns:1fr}.feature-band{grid-template-columns:1fr;padding:25px;gap:15px}.section-head{display:block}.section{padding:32px 0}.page-head{padding:35px 0 15px}.result{grid-template-columns:65px 1fr;gap:10px}.reading{font-size:17px}.workfacts{grid-template-columns:1fr}.experiment{padding:18px}.controls{align-items:stretch;flex-direction:column}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}