:root{
  --ink:#0f1b16;--green:#123a2e;--green2:#1f5442;--accent:#ed572f;--orange:#f2a066;
  --line:#d6ddd7;--soft:#f4f7f3;--muted:#56655d;--paper:#fff;--gated:#b7652e;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:#fff;color:var(--ink);font-family:"DM Sans","Noto Sans SC",sans-serif}
button,a{font:inherit}
.network-topbar{height:68px;position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:26px;padding:0 max(24px,calc((100vw - 1500px)/2));background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(10px)}
.back-link{color:var(--ink);text-decoration:none;font-size:12px;font-weight:700}
.back-link:hover{color:var(--accent)}
.topbar-mark{font-size:10px;letter-spacing:.16em;color:var(--accent);font-weight:800}
.network-topbar nav{margin-left:auto;display:flex;gap:20px}
.network-topbar nav a{color:#45544c;text-decoration:none;font-size:12px}
.network-topbar nav a:hover{color:var(--accent)}
main{max-width:1500px;margin:auto;padding:0 24px 70px}
.network-hero{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(480px,.7fr);gap:50px;padding:64px 0 48px;border-bottom:1px solid var(--line)}
.eyebrow,.section-head span,.method-card>span,.rules-panel>div>span,.multiplier-panel>div>span,.sources>span{font-size:10px;font-weight:800;letter-spacing:.17em;color:var(--accent)}
.hero-copy h1{font-size:58px;line-height:1.03;letter-spacing:-.045em;margin:14px 0 20px}
.hero-copy>p{max-width:720px;margin:0;color:#425149;font-size:14px;line-height:1.8}
.scope-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:24px}
.scope-tags span{padding:6px 10px;border-radius:15px;background:#eef3ef;color:#405047;font-size:11px;font-weight:600}
.hero-metrics{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;align-self:end}
.hero-metrics article{min-height:150px;padding:20px;border:1px solid var(--line);border-radius:15px;background:#fff}
.hero-metrics b{display:block;font-size:42px;line-height:1;color:var(--green)}
.hero-metrics span{display:block;font-size:12px;font-weight:700;margin:12px 0 5px}
.hero-metrics small{font-size:10.5px;line-height:1.5;color:var(--muted)}
.scope-note{display:grid;grid-template-columns:150px 1fr;gap:18px;padding:16px 20px;margin:20px 0 0;border-left:3px solid var(--accent);background:#fff4ee}
.scope-note strong{font-size:11px}
.scope-note p{font-size:11px;line-height:1.65;margin:0;color:#3f4c45}
.section-block{padding:58px 0;border-bottom:1px solid var(--line)}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:24px}
.section-head h2{font-size:31px;margin:6px 0 0;letter-spacing:-.025em}
.section-head>p{max-width:540px;font-size:12px;line-height:1.65;color:var(--muted);text-align:right;margin:0}
.network-toolbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.legend{display:flex;gap:18px;flex-wrap:wrap}
.legend span{display:flex;align-items:center;gap:7px;color:#45544c;font-size:10.5px}
.legend i{display:block;width:24px;height:3px;border-radius:4px;background:var(--green)}
.legend i.gated{background:var(--accent);background-image:repeating-linear-gradient(90deg,transparent 0 4px,#fff 4px 6px)}
.legend i.sink{width:10px;height:10px;border-radius:50%;background:var(--accent)}
#resetNetwork{border:1px solid var(--line);border-radius:18px;padding:7px 12px;background:#fff;color:#415047;font-size:10.5px;cursor:pointer}
.network-canvas{height:600px;position:relative;overflow:hidden;border:1px solid var(--line);border-radius:18px;background:
  radial-gradient(circle at 50% 45%,rgba(36,84,67,.08),transparent 42%),
  linear-gradient(#fff,#f7faf7)}
.network-canvas:after{content:"拓扑布局 · 非地理比例";position:absolute;right:14px;bottom:12px;color:#87938c;font-size:8px;letter-spacing:.1em}
.network-svg{position:absolute;inset:0;width:100%;height:100%}
.network-edge{stroke:var(--green2);stroke-width:2.2;opacity:.33;fill:none;transition:.2s}
.network-edge.gated{stroke:var(--accent);stroke-dasharray:7 5;opacity:.55}
.network-edge.muted{opacity:.06}
.network-edge.hot{stroke-width:4;opacity:1}
.network-node{position:absolute;transform:translate(-50%,-50%);min-width:104px;padding:9px 11px;border:1px solid #b9c5bd;border-radius:12px;background:#fff;box-shadow:0 6px 18px rgba(20,51,40,.08);cursor:pointer;text-align:left;transition:.18s;z-index:2}
.network-node:hover,.network-node.active{transform:translate(-50%,-50%) scale(1.05);border-color:var(--green);box-shadow:0 10px 26px rgba(16,55,42,.15)}
.network-node.sink{border-color:#e78b70;background:#fff7f3}
.network-node.gate{box-shadow:inset 0 3px var(--accent),0 6px 18px rgba(20,51,40,.08)}
.network-node strong{display:block;font-size:11.5px}
.network-node small{font-size:9.5px;color:#56655d}
.network-node em{position:absolute;right:7px;top:6px;color:var(--accent);font-size:9.5px;font-style:normal}
.network-node-preview{position:fixed;z-index:100;margin:0;overflow:hidden;pointer-events:none;border:1px solid rgba(255,255,255,.72);border-radius:16px;background:#0a1711;box-shadow:0 24px 70px rgba(8,27,19,.32);opacity:0;transform:translateY(8px) scale(.985);transform-origin:center;transition:opacity .14s ease,transform .14s ease}
.network-node-preview[hidden]{display:none}
.network-node-preview.visible{opacity:1;transform:translateY(0) scale(1)}
.network-node-preview img{display:block;width:100%;height:100%;object-fit:cover}
.network-node-preview:after{content:"";position:absolute;inset:55% 0 0;background:linear-gradient(transparent,rgba(3,12,8,.88))}
.network-node-preview figcaption{position:absolute;z-index:1;left:0;right:0;bottom:0;padding:18px;color:#fff}
.network-node-preview figcaption strong{display:block;font-size:18px;line-height:1.2;text-shadow:0 2px 8px rgba(0,0,0,.5)}
.network-node-preview figcaption span{display:block;margin-top:5px;color:#d8e3dd;font-size:10px;letter-spacing:.05em}
.network-inspector{min-height:90px;display:grid;grid-template-columns:150px 1.3fr 1fr auto;gap:16px;align-items:center;padding:14px 17px;border:1px solid var(--line);border-radius:13px;margin-top:10px}
.network-inspector h3{margin:0;font-size:16px}
.network-inspector h3 small{display:block;color:var(--muted);font-size:10px;margin-top:4px}
.network-inspector p{margin:0;color:#3d4b43;font-size:11.5px;line-height:1.6}
.network-inspector .degree{display:flex;gap:8px}
.network-inspector .degree span{padding:8px 10px;border-radius:8px;background:#eef3ef;font-size:10.5px}
.network-inspector a{padding:8px 12px;border-radius:16px;background:var(--green);color:#fff;text-decoration:none;font-size:10.5px}
.analysis-methods{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.method-card{border:1px solid var(--line);border-radius:16px;padding:22px;background:#fff}
.method-card.mixed{grid-column:1/-1;background:var(--green);color:#fff;border-color:var(--green)}
.method-card h3{font-size:19px;margin:6px 0 18px}
.method-card strong{display:block;font-size:13px;line-height:1.55;margin-bottom:8px}
.method-card p,.method-card li{font-size:12px;line-height:1.72}
.method-card p{color:#3e4c44}
.method-card ul{margin:10px 0 0;padding-left:18px;color:#34433b}
.method-card.mixed p{color:#dce7e1}
.metric-list{display:grid;grid-template-columns:repeat(4,1fr);gap:7px}
.metric-list div{padding:12px 9px;background:#f1f5f1;border-radius:9px}
.metric-list b{font-size:22px;color:var(--green)}
.metric-list span{display:block;font-size:10px;line-height:1.45;color:#4d5b53;margin-top:6px}
.degree-chart{display:flex;align-items:flex-end;gap:5px;height:110px;margin-top:18px;padding-top:12px;border-top:1px solid var(--line)}
.degree-bar{position:relative;flex:1;height:100%}
.degree-bar i{position:absolute;left:12%;right:12%;bottom:20px;border-radius:4px 4px 0 0;background:linear-gradient(var(--accent),var(--green));min-height:5px}
.degree-bar span{position:absolute;bottom:0;left:50%;transform:translateX(-50%) rotate(-28deg);transform-origin:center;font-size:8.5px;color:#59675f;white-space:nowrap}
.route-strip{display:flex;align-items:center;gap:5px;flex-wrap:wrap;margin:16px 0}
.route-strip span{padding:7px 9px;background:rgba(255,255,255,.1);border-radius:7px;font-size:10.5px;font-weight:600}
.route-strip i{color:#f49a78;font-style:normal}
.formula{border-top:1px solid rgba(255,255,255,.16);padding-top:13px!important;color:#ffb398!important;font-size:11px!important;font-weight:700}
.rules-panel,.multiplier-panel{display:grid;grid-template-columns:220px 1fr;gap:24px;padding:20px;margin-top:12px;border:1px solid var(--line);border-radius:15px;background:#fafcf9}
.rules-panel h3,.multiplier-panel h3{font-size:16px;margin:5px 0}
.multiplier-panel>div>p{font-size:11px;color:var(--muted);line-height:1.55}
.rules-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:7px}
.rule-item{padding:10px;border-left:2px solid var(--accent);background:#fff}
.rule-item b{font-size:11px}
.rule-item span{display:block;font-size:10.5px;color:#435149;margin-top:4px;line-height:1.5}
.multiplier-chart{display:grid;grid-template-columns:repeat(16,1fr);gap:4px;align-items:end;height:150px}
.multiplier-bar{height:100%;position:relative}
.multiplier-bar i{position:absolute;bottom:22px;left:12%;right:12%;border-radius:4px 4px 0 0;background:linear-gradient(var(--orange),var(--accent))}
.multiplier-bar b{position:absolute;bottom:3px;left:0;right:0;text-align:center;font-size:9.5px}
.multiplier-bar span{position:absolute;left:0;right:0;text-align:center;font-size:9px;color:#59675f}
.location-filter{display:flex;gap:6px;flex-wrap:wrap;margin:-4px 0 18px}
.location-filter button{border:1px solid var(--line);border-radius:16px;background:#fff;padding:7px 11px;color:#4a5951;font-size:10.5px;cursor:pointer}
.location-filter button.active{background:var(--green);color:#fff;border-color:var(--green)}
.location-cards{display:flex;flex-direction:column;gap:14px}
.location-card{scroll-margin-top:84px;border:1px solid var(--line);border-radius:17px;overflow:hidden;background:#fff}
.location-card-main{display:grid;grid-template-columns:minmax(0,2fr) minmax(310px,1fr);min-height:420px}
.location-figure{position:relative;min-height:420px;margin:0;overflow:hidden;background:#10231b;cursor:zoom-in}
.location-figure img{width:100%;height:100%;position:absolute;inset:0;object-fit:cover;display:block}
.location-figure:after{content:"";position:absolute;inset:55% 0 0;background:linear-gradient(transparent,rgba(4,12,8,.87))}
.location-figure figcaption{position:absolute;z-index:3;left:18px;right:18px;bottom:15px;color:#fff;display:flex;justify-content:space-between;gap:12px;align-items:end}
.location-figure figcaption b{font-size:13px}
.location-figure figcaption span{font-size:9.5px;color:#dce6e1;text-align:right}
.image-callout{position:absolute;z-index:4;width:12px;height:12px;border:2px solid #fff;background:var(--accent);border-radius:50%;box-shadow:0 0 0 3px rgba(237,87,47,.3)}
.image-callout:after{content:"";position:absolute;left:9px;top:3px;width:34px;height:1px;background:#fff;transform:rotate(-15deg);transform-origin:left}
.image-callout span{position:absolute;left:37px;top:-12px;width:max-content;max-width:175px;padding:5px 7px;border-radius:4px;background:rgba(7,18,13,.86);color:#fff;font-size:10px;line-height:1.3}
.image-callout.left:after{left:auto;right:9px;transform:rotate(15deg);transform-origin:right}
.image-callout.left span{left:auto;right:37px;text-align:right}
.location-copy{padding:20px}
.location-copy header{display:flex;gap:10px;align-items:start;padding-bottom:13px;border-bottom:1px solid var(--line)}
.location-index{color:var(--accent);font-size:10px;font-weight:800}
.location-copy h3{font-size:21px;line-height:1.1;margin:0}
.location-copy h3 small{display:block;font-size:10.5px;color:var(--muted);font-weight:500;margin-top:5px}
.location-copy header>a{margin-left:auto;color:#496257;text-decoration:none;font-size:9.5px}
.fact-row{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin:12px 0}
.fact-row span{padding:8px;background:#f1f5f1;border-radius:7px;font-size:10.5px;line-height:1.4}
.location-copy section{padding:9px 0;border-top:1px solid #e4e8e3}
.location-copy section:first-of-type{border-top:0}
.location-copy section b{display:block;color:var(--accent);font-size:9.5px;letter-spacing:.08em;margin-bottom:4px}
.location-copy section p{font-size:11.5px;line-height:1.65;color:#34433b;margin:0}
.location-analysis{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;padding:10px;background:#f5f7f4}
.location-analysis article{padding:12px;background:#fff;border-top:2px solid var(--green)}
.location-analysis article:nth-child(2){border-color:var(--accent)}
.location-analysis article:nth-child(3){border-color:#8b6aab}
.location-analysis span{font-size:9.5px;font-weight:800;letter-spacing:.1em;color:var(--accent)}
.location-analysis strong{display:block;font-size:11.5px;margin:5px 0}
.location-analysis p{font-size:11.5px;line-height:1.6;color:#3c4a42;margin:0}
.relation-strip{display:flex;align-items:center;gap:6px;flex-wrap:wrap;padding:10px 14px;border-top:1px solid var(--line);font-size:10.5px}
.relation-strip>b{margin-right:5px}
.relation-strip a,.relation-strip span{padding:5px 8px;border-radius:12px;background:#edf2ee;color:#2d493d;text-decoration:none}
.relation-strip span.gated{background:#fff0e9;color:#ad4528}
.sources{padding:50px 0}
.sources h2{font-size:25px;margin:7px 0 16px}
.sources div{display:flex;flex-wrap:wrap;gap:8px}
.sources a{padding:8px 11px;border:1px solid var(--line);border-radius:8px;color:#2b5141;text-decoration:none;font-size:10.5px}
.location-lightbox{width:min(94vw,1400px);height:auto;max-height:92vh;padding:0;border:0;border-radius:14px;background:#07110d;color:#fff;box-shadow:0 24px 80px rgba(0,0,0,.45)}
.location-lightbox::backdrop{background:rgba(4,9,7,.88)}
.location-lightbox>button{position:absolute;right:14px;top:10px;z-index:2;width:34px;height:34px;border:0;border-radius:50%;background:rgba(255,255,255,.14);color:#fff;font-size:22px;cursor:pointer}
.location-lightbox figure{margin:0}
.location-lightbox img{display:block;width:100%;max-height:82vh;object-fit:contain}
.location-lightbox figcaption{padding:11px 15px;font-size:11.5px;color:#d9e2dd}
@media(max-width:1050px){
  .network-hero{grid-template-columns:1fr}.hero-metrics{grid-template-columns:repeat(4,1fr)}
  .analysis-methods{grid-template-columns:1fr}.method-card.mixed{grid-column:auto}
  .location-card-main{grid-template-columns:1fr}.location-figure{min-height:440px}
}
@media(max-width:760px){
  .network-topbar nav,.topbar-mark{display:none}main{padding:0 14px 50px}
  .network-hero{padding-top:38px}.hero-copy h1{font-size:40px}.hero-metrics{grid-template-columns:repeat(2,1fr)}
  .scope-note,.rules-panel,.multiplier-panel{grid-template-columns:1fr}.section-head{align-items:start;flex-direction:column}
  .section-head>p{text-align:left}.network-canvas{height:720px;overflow:auto}
  .network-inspector{grid-template-columns:1fr}.metric-list{grid-template-columns:repeat(2,1fr)}
  .rules-grid{grid-template-columns:1fr 1fr}.location-figure{min-height:300px}.location-analysis{grid-template-columns:1fr}
}