:root{--paper:#f4ebdc;--ink:#272c25;--muted:#717267;--line:#d8cebd;--green:#293d35;--lime:#c5d89a;--rust:#a7563a;--card:#fbf8f1;--serif:"Noto Serif SC","Songti SC","SimSun",serif;--sans:"Microsoft YaHei",system-ui,sans-serif;--mono:Consolas,monospace}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:95px}body{margin:0;background:var(--paper);color:var(--ink);font:14.5px/1.85 var(--sans)}a{color:inherit;text-decoration:none}button,input,select{font:inherit}a,button,input,select,summary{-webkit-tap-highlight-color:transparent}a,button,summary{touch-action:manipulation}button{cursor:pointer}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--rust);outline-offset:4px}button{color:inherit}figure,h1,h2,h3,h4,p{margin:0}h1,h2,h3,h4{font-family:var(--serif);font-weight:500}svg{display:block;width:100%;height:auto}svg text{font-family:var(--sans)}.skip{position:fixed;top:-80px;left:20px;z-index:100;background:var(--card);padding:10px}.skip:focus{top:10px}.topbar{position:sticky;top:0;z-index:20;min-height:68px;display:flex;align-items:center;gap:32px;padding:12px 5vw;border-bottom:1px solid var(--line);background:rgba(244,235,220,.96);backdrop-filter:blur(16px)}.brand{display:flex;align-items:center;gap:10px;font-weight:700;white-space:nowrap}.mark{display:inline-grid;place-items:center;background:var(--green);color:var(--lime);width:29px;height:29px;border-radius:50%;font:22px var(--serif)}.topbar nav{display:flex;align-items:center;gap:25px;font-size:13px}.topbar nav a:hover{color:var(--rust)}.network-toggle{margin-left:auto;position:relative}.network-toggle summary{cursor:pointer;list-style:none;font-size:13px;border:1px solid var(--line);padding:7px 12px}.network-menu{position:absolute;right:0;top:47px;min-width:240px;box-shadow:0 12px 32px #19271f22;background:var(--card);border:1px solid var(--line);padding:10px}.network-menu a{display:flex;justify-content:space-between;gap:10px;padding:8px 12px;font-size:13px}.network-menu a:hover{background:#e9e7d9}.network-menu small{color:var(--rust)}.hero{position:relative;overflow:hidden;background:var(--green);color:#f4eee2;padding:68px max(6vw,24px) 58px}.hero-inner{max-width:1240px;margin:auto;display:grid;grid-template-columns:1.1fr 1fr;gap:70px;align-items:center}.eyebrow{font:12px/1.6 var(--mono);letter-spacing:.15em;color:#7b8d6c;margin-bottom:17px}.hero .eyebrow{color:var(--lime)}h1{font-size:clamp(38px,4.6vw,65px);line-height:1.3;letter-spacing:-.04em;margin-bottom:24px}h1 em{color:var(--lime);font-style:normal}.lede{color:#ccd3c4;font-size:14.5px;max-width:570px;line-height:2}.hero-meta{display:flex;gap:28px;margin:27px 0;font:21px var(--mono);color:var(--lime)}.hero-meta span{padding-right:28px;border-right:1px solid #62725d}.hero-meta span:last-child{border:0}.hero-meta small{font:12px/2.5 var(--sans);display:block;color:#c3cbbd}.text-link{font-size:13px;color:var(--rust);display:inline-flex;gap:20px;align-items:center}.hero .text-link{color:var(--lime)}.art{background:#21362d;border:1px solid #64785870;box-shadow:12px 12px 0 #192c244d;padding:12px}.art figcaption{text-align:right;font-size:11px;color:#bdc8b3;padding:0 8px 10px}.intro{max-width:1360px;padding:26px 6vw;margin:auto;display:grid;grid-template-columns:150px 1fr;gap:25px;border-bottom:1px solid var(--line);color:#62675b;font-size:13px}.intro strong{color:var(--rust);font-weight:400}.section{max-width:1400px;padding:64px 6vw;margin:auto}.section-head{display:flex;justify-content:space-between;gap:25px;align-items:end;margin-bottom:30px}.section-head h2{font-size:36px;line-height:1.4}.section-head p:not(.eyebrow){color:var(--muted);font-size:13px;margin-top:10px}.section-index{font:13px var(--mono);color:var(--rust);white-space:nowrap}.toolbar{display:flex;gap:20px;justify-content:space-between;align-items:center;margin:0 0 24px;padding-bottom:16px;border-bottom:1px solid var(--line)}.filters{display:flex;flex-wrap:wrap;gap:6px}.chip{border:1px solid transparent;background:0 0;color:var(--muted);font-size:13px;padding:7px 13px}.chip.active{background:var(--green);color:var(--paper)}.search{border:0;border-bottom:1px solid #a69f8b;background:0 0;max-width:270px;min-width:0;width:100%;padding:8px;font-size:13px;color:var(--ink)}.idea-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.idea-card{background:var(--card);border:1px solid var(--line);display:flex;flex-direction:column;transition:transform .2s,box-shadow .2s}.idea-card:hover{transform:translateY(-4px);box-shadow:4px 5px 0 #293d3519}.mini-art{aspect-ratio:1.65;background:#e8e9db;border-bottom:1px solid var(--line);overflow:hidden}.mini-art svg{height:100%;width:100%}.card-content{padding:20px;display:flex;flex-direction:column;flex:1}.card-no{font:11px var(--mono);letter-spacing:.1em;color:var(--rust)}.card-content h3{font-size:23px;margin:6px 0 10px}.card-content p{font-size:13px;color:var(--muted);margin-bottom:20px}.card-bottom{margin-top:auto;display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);padding-top:13px;color:#63715a;font-size:11px}.map-wrap{padding:30px;background:#e9dfce;border:1px solid var(--line)}.map-wrap svg{max-height:510px}.map-wrap a:hover circle{fill:#c5d89a}.map-wrap a:focus-visible circle{stroke:var(--rust);stroke-width:4}.map-note{text-align:center;color:var(--muted);font-size:12px;margin-top:14px}.article-layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:48px;align-items:start}.topic-nav{position:sticky;top:96px;border-top:2px solid var(--green)}.topic-nav a{display:block;padding:12px 8px;border-bottom:1px solid var(--line);font-size:13px;color:var(--muted)}.topic-nav a:hover{color:var(--rust)}.topic-nav span{font:11px var(--mono);margin-right:14px;color:var(--rust)}.topic{padding:0 0 48px;margin-bottom:48px;border-bottom:1px solid var(--line);scroll-margin-top:100px}.topic-heading{display:flex;align-items:baseline;gap:18px;margin-bottom:20px}.topic h3{font-size:32px}.topic-heading small{font:12px var(--mono);color:var(--muted)}.topic-lead{font:20px/1.85 var(--serif);color:#435642;margin-bottom:23px}.topic-columns{display:grid;grid-template-columns:1fr 1fr;gap:28px}.topic h4{font-size:15.5px;margin-bottom:9px}.topic p{color:#65675e;font-size:13.5px;margin-bottom:17px}.formula{background:#e9e9dc;border-left:3px solid #788461;padding:17px 20px;font:19px/1.8 var(--serif);margin:19px 0;color:var(--green)}.question{padding:16px 19px;background:#efe3d4;font-size:13px;margin-top:18px}.question b{display:block;color:var(--rust);margin-bottom:5px;font-weight:500}.related{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}.related a,.source-link{font-size:12px;color:#516c51;border-bottom:1px solid #acb499;padding:4px 0;margin-right:14px}.related a:hover,.source-link:hover{color:var(--rust)}.path-band{background:var(--green);color:var(--paper);padding:48px 6vw}.path-inner{max-width:1220px;margin:auto}.path-band h2{font-size:30px;margin-bottom:24px}.path-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px}.path-card{border:1px solid #718268;padding:22px}.path-card small{color:var(--lime);font:11px var(--mono)}.path-card h3{font-size:19px;margin:9px 0}.path-card p{font-size:13px;color:#c3ccbc;margin-bottom:15px}.path-card a{font-size:12px;color:var(--lime)}.sources{background:#e9dfce;padding:52px 6vw 22px}.sources-inner{max-width:1220px;margin:auto}.sources h2{font-size:28px;margin-bottom:25px}.source-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:35px}.source-grid h3{font-size:15.5px;margin-bottom:10px}.source-grid p{font-size:13px;color:var(--muted)}.source-grid a{display:block;font-size:12px;color:#52654f;margin-top:8px}footer{display:flex;justify-content:space-between;gap:25px;border-top:1px solid #cfc4b1;margin-top:35px;padding-top:17px;font-size:11px;color:var(--muted)}.empty{grid-column:1/-1;padding:50px;text-align:center;color:var(--muted)}.lab-tabs{display:flex;flex-wrap:wrap;gap:7px;margin:0 0 24px}.lab-tabs a{font-size:13px;border:1px solid var(--line);padding:7px 16px}.lab-tabs a:hover{background:var(--green);color:var(--paper)}.experiment{border:1px solid var(--line);background:var(--card);margin-bottom:38px;scroll-margin-top:100px}.exp-head{padding:22px 28px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:18px}.exp-head h3{font-size:24px}.exp-head .eyebrow{margin:0 0 5px;color:var(--rust);font-size:11px}.tag{font-size:11px;color:#687259;border:1px solid #cbd1bb;padding:4px 10px;white-space:nowrap}.exp-main{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(250px,1fr)}.stage{background:#ececde;padding:18px;min-width:0;display:flex;align-items:center;justify-content:center;border-right:1px solid var(--line)}.stage svg{width:100%;max-height:360px;aspect-ratio:1.65}.controls{padding:26px;min-width:0}.controls>p{font-size:13px;color:var(--muted);margin-bottom:18px}.control{display:block;margin:16px 0;font-size:13px}.control span{display:flex;justify-content:space-between;gap:12px}.control input[type=range]{width:100%;accent-color:var(--green);margin-top:12px}.control select{width:100%;background:var(--paper);border:1px solid var(--line);padding:8px;margin-top:8px}.readout{background:var(--green);color:var(--lime);padding:15px 17px;font:15.5px/1.8 var(--mono);margin-top:16px;min-height:65px}.readout small{display:block;color:#c6d0be;font:12px/1.8 var(--sans);margin-top:4px}.btn{background:var(--green);border:1px solid var(--green);color:var(--paper);padding:8px 15px;font-size:13px}.btn.secondary{background:0 0;color:var(--green);border-color:#a2ad96}.button-row{display:flex;flex-wrap:wrap;gap:8px}.exp-foot{padding:22px 28px;border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr;gap:25px}.exp-foot h4{font-size:14.5px;margin-bottom:7px}.exp-foot p{font-size:13px;color:var(--muted)}.exp-foot details{font-size:13px}.exp-foot summary{color:var(--rust);cursor:pointer;margin-bottom:8px}.exp-foot details p{margin:8px 0}.exp-links{display:flex;gap:15px;flex-wrap:wrap;margin-top:13px}.exp-links a{font-size:12px;color:#59714e;border-bottom:1px solid #adb79a}.site-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.site-card{border:1px solid var(--line);background:var(--card);padding:26px;display:flex;flex-direction:column}.site-card h3{font-size:23px;margin:12px 0}.site-card p{color:var(--muted);font-size:13px;margin-bottom:24px}.site-card a{color:var(--rust);font-size:13px;margin-top:auto}.site-card.featured{background:var(--green);color:var(--paper)}.site-card.featured p{color:#c3cdbd}.site-card.featured a{color:var(--lime)}.route-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:13px}.route-step{position:relative;border:1px solid var(--line);padding:24px 20px;background:var(--card);font-size:13px}.route-step b{font:12px var(--mono);color:var(--rust)}.route-step h3{font-size:21px;margin:10px 0}.route-step p{color:var(--muted);margin-bottom:20px}.route-step a{color:#55704e;border-bottom:1px solid #b8c0a8}.demo-panel{display:grid;grid-template-columns:1fr 1fr;gap:40px;margin-top:34px;background:#e9dfce;padding:30px}.demo-panel h3{font-size:22px;margin-bottom:13px}.demo-panel p{font-size:13.5px;color:var(--muted);margin-bottom:18px}.demo-panel .related a{background:var(--card);padding:12px 16px;border:1px solid var(--line)}.notice{border-left:3px solid var(--rust);padding:14px 20px;background:#ecdfce;font-size:13px;color:#6c5845;margin-top:24px}.graph-node{cursor:pointer}.graph-node:hover circle{fill:#c5d89a}.edge-used{stroke:#a7563a!important}.wide-label{font:11px var(--mono);color:var(--muted)}@media(min-width:1500px){.hero{padding-top:85px;padding-bottom:75px}.hero-inner{gap:100px}}@media(max-width:1000px){.hero-inner{gap:35px}.idea-grid{grid-template-columns:repeat(2,1fr)}.topbar{gap:20px}.topbar nav{gap:15px}.article-layout{grid-template-columns:150px 1fr;gap:30px}.exp-main{grid-template-columns:1.2fr 1fr}.route-steps{grid-template-columns:repeat(2,1fr)}}@media(max-width:700px){html{scroll-padding-top:90px}.topbar{padding:10px 18px;gap:10px;min-height:62px;flex-wrap:wrap}.brand{font-size:13.5px}.topbar nav{display:none}.network-toggle summary{font-size:11px}.hero{padding:42px 22px}.hero-inner{grid-template-columns:1fr;gap:30px}h1{font-size:42px}.lede{font-size:13.5px}.hero .art{width:100%;max-width:460px;justify-self:center}.hero-meta{font-size:19px;gap:15px}.hero-meta span{padding-right:15px}.intro{padding:22px;grid-template-columns:1fr;gap:8px}.section{padding:44px 20px}.section-head{align-items:start;gap:12px}.section-head h2{font-size:28px}.section-index{font-size:11px;padding-top:10px}.section-head .eyebrow{font-size:10px}.toolbar{align-items:stretch;flex-direction:column;gap:12px}.search{max-width:none}.idea-grid{gap:10px}.card-content{padding:15px}.card-content h3{font-size:20px}.card-content p{font-size:12px}.card-bottom{font-size:10px}.map-wrap{padding:8px;overflow:auto}.map-wrap svg{min-width:600px}.article-layout{display:block}.topic-nav{position:static;display:flex;flex-wrap:wrap;margin-bottom:35px;border-bottom:1px solid var(--line)}.topic-nav a{padding:8px;border:0}.topic-nav span{margin-right:5px}.topic-columns{grid-template-columns:1fr;gap:5px}.topic h3{font-size:28px}.topic-heading{gap:12px;flex-wrap:wrap}.topic-lead{font-size:18px}.path-band{padding:36px 22px}.path-grid,.site-grid,.source-grid{grid-template-columns:1fr;gap:16px}.sources{padding:38px 22px 20px}footer{flex-direction:column;gap:5px}.exp-head{padding:19px;align-items:start}.exp-head h3{font-size:22px}.exp-main{grid-template-columns:1fr}.stage{border-right:0;border-bottom:1px solid var(--line);padding:12px}.controls{padding:19px}.exp-foot{padding:19px;grid-template-columns:1fr;gap:16px}.lab-tabs a{font-size:12px;padding:6px 11px}.route-steps{grid-template-columns:1fr}.demo-panel{grid-template-columns:1fr;padding:20px;gap:25px}.map-note{text-align:left}.tag{font-size:10px}.section-head h2{max-width:20ch}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}.graph-start-tip{padding:10px 12px;background:#e4ebd5;border-left:2px solid #819568;color:#465f42!important;font-size:12px!important}.graph-solution{padding:12px;background:#f0e5d5;color:#65563f!important;font-size:12px!important;line-height:1.9}