:root{
  --ink:#17211d;
  --muted:#596660;
  --line:#d8dfda;
  --soft:#f4f6f3;
  --green:#103f32;
  --green-2:#1e604d;
  --orange:#f15a38;
  --orange-soft:#fff0ea;
  --white:#fff;
  --shadow:0 18px 55px rgba(18,45,37,.12);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  color:var(--ink);
  background:#fff;
  font-family:"DM Sans","Noto Sans SC",system-ui,sans-serif;
  font-size:15px;
  line-height:1.65;
}
button,a{font:inherit}
button{color:inherit}
a{color:inherit}
img{display:block;max-width:100%}

.site-topbar{
  position:sticky;
  z-index:30;
  top:0;
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  min-height:58px;
  padding:0 clamp(20px,4vw,72px);
  color:#fff;
  background:rgba(13,53,42,.96);
  border-bottom:1px solid rgba(255,255,255,.16);
  backdrop-filter:blur(16px);
}
.site-topbar>span{
  color:#a9c7bb;
  font-size:11px;
  font-weight:800;
  letter-spacing:.18em;
}
.site-topbar nav{justify-self:end;display:flex;gap:24px}
.site-topbar a{text-decoration:none}
.site-topbar nav a{color:#dbe8e2;font-size:13px}
.site-topbar nav a:hover,.back-link:hover{color:#fff}
.back-link{font-size:13px;font-weight:700}

main{
  width:min(1500px,calc(100% - 48px));
  margin:0 auto;
  padding:26px 0 80px;
}

.hero{
  overflow:hidden;
  display:grid;
  grid-template-columns:minmax(0,1.2fr) minmax(540px,.8fr);
  min-height:300px;
  color:#fff;
  background:
    radial-gradient(circle at 22% 20%,rgba(56,127,104,.45),transparent 36%),
    linear-gradient(135deg,#0e3329 0%,#0a241e 100%);
  border-radius:22px;
}
.hero-copy{padding:52px 56px 44px}
.eyebrow,.section-head>div>span,.method-card>span,.relation-panel>div>span,.sources>span{
  color:var(--orange);
  font-size:11px;
  font-weight:800;
  letter-spacing:.16em;
}
.hero h1{
  margin:13px 0 4px;
  font-size:clamp(34px,4vw,62px);
  line-height:1.05;
  letter-spacing:-.04em;
}
.hero-copy>p{margin:0;color:#bcd0c8;font-size:17px}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:30px}
.hero-tags span{
  padding:8px 12px;
  color:#e8f1ed;
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.12);
  border-radius:999px;
  font-size:12px;
}
.hero-metrics{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  padding:28px;
  gap:1px;
  background:rgba(255,255,255,.08);
}
.hero-metrics article{
  display:flex;
  min-height:120px;
  padding:22px;
  flex-direction:column;
  justify-content:center;
  background:rgba(5,28,23,.54);
}
.hero-metrics b{font-size:32px;line-height:1}
.hero-metrics span{margin-top:10px;font-size:13px;font-weight:700}
.hero-metrics small{margin-top:5px;color:#a9c1b8;font-size:11px;line-height:1.45}

.scope-note{
  display:grid;
  grid-template-columns:190px 1fr;
  align-items:start;
  margin:14px 0 32px;
  padding:20px 24px;
  background:var(--orange-soft);
  border:1px solid #f4d5ca;
  border-radius:14px;
}
.scope-note strong{color:#b93b21}
.scope-note p{margin:0;color:#4b5b54}

.section-block{
  scroll-margin-top:78px;
  margin-top:22px;
  padding:30px;
  border:1px solid var(--line);
  border-radius:20px;
  background:#fff;
}
.section-head{
  display:flex;
  align-items:end;
  justify-content:space-between;
  gap:40px;
  margin-bottom:22px;
}
.section-head h2,.sources h2{
  margin:6px 0 0;
  font-size:27px;
  line-height:1.15;
  letter-spacing:-.025em;
}
.section-head>p{
  width:min(560px,48%);
  margin:0;
  color:var(--muted);
  font-size:13px;
  text-align:right;
}

.network-toolbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:10px 14px;
  background:var(--soft);
  border:1px solid var(--line);
  border-bottom:0;
  border-radius:14px 14px 0 0;
}
.legend{display:flex;flex-wrap:wrap;gap:18px;color:var(--muted);font-size:12px}
.legend span{display:flex;align-items:center;gap:7px}
.legend i{width:26px;height:3px;background:var(--green);border-radius:4px}
.legend i.conditional{height:0;background:none;border-top:3px dashed var(--orange)}
.legend i.hub{width:10px;height:10px;background:var(--orange);border-radius:50%}
#resetNetwork{
  border:0;
  padding:7px 12px;
  color:var(--green);
  background:#fff;
  border-radius:8px;
  cursor:pointer;
  font-size:12px;
  font-weight:700;
  box-shadow:inset 0 0 0 1px var(--line);
}
#resetNetwork:hover{box-shadow:inset 0 0 0 1px var(--green)}

.network-canvas{
  position:relative;
  overflow:hidden;
  height:640px;
  background:
    linear-gradient(rgba(16,63,50,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(16,63,50,.035) 1px,transparent 1px),
    radial-gradient(circle at center,#fff 0%,#f2f6f3 100%);
  background-size:40px 40px,40px 40px,auto;
  border:1px solid var(--line);
}
.network-svg{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.network-edge{
  fill:none;
  stroke:#9fb0a8;
  stroke-width:3;
  opacity:.7;
  transition:.18s;
}
.network-edge.conditional{stroke:var(--orange);stroke-dasharray:11 8}
.network-edge.directed{marker-end:url(#arrow)}
.network-edge.dimmed{opacity:.08}
.network-edge.active{stroke:var(--orange);stroke-width:5;opacity:1}
.network-node{
  position:absolute;
  z-index:2;
  width:168px;
  min-height:72px;
  padding:12px 14px;
  text-align:left;
  background:#fff;
  border:1px solid #b8c8c0;
  border-radius:14px;
  box-shadow:0 12px 28px rgba(20,50,41,.09);
  cursor:pointer;
  transform:translate(-50%,-50%);
  transition:transform .16s,box-shadow .16s,border-color .16s,opacity .16s;
}
.network-node:hover,.network-node:focus-visible{
  z-index:4;
  border-color:var(--orange);
  box-shadow:0 18px 38px rgba(20,50,41,.18);
  outline:0;
  transform:translate(-50%,-50%) translateY(-3px);
}
.network-node.selected{
  color:#fff;
  background:var(--green);
  border-color:var(--green);
}
.network-node.hub-node{border-top:4px solid var(--orange)}
.network-node.dimmed{opacity:.24}
.network-node b{display:block;font-size:14px;line-height:1.3}
.network-node span{
  display:block;
  overflow:hidden;
  margin-top:5px;
  color:#718078;
  font-size:11px;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.network-node.selected span{color:#c7ddd4}
.network-node em{
  position:absolute;
  top:8px;
  right:9px;
  color:var(--orange);
  font-size:10px;
  font-style:normal;
  font-weight:800;
}

.network-inspector{
  min-height:94px;
  padding:18px 20px;
  background:var(--green);
  color:#fff;
  border-radius:0 0 14px 14px;
}
.inspector-empty{color:#c2d7cf}
.inspector-grid{display:grid;grid-template-columns:1fr 1.3fr auto;align-items:center;gap:22px}
.inspector-grid small{display:block;color:#9fc0b4;font-size:11px;letter-spacing:.12em}
.inspector-grid strong{display:block;margin-top:3px;font-size:18px}
.inspector-grid p{margin:0;color:#d7e6e0;font-size:13px}
.inspector-grid button{
  border:1px solid rgba(255,255,255,.25);
  padding:9px 13px;
  color:#fff;
  background:rgba(255,255,255,.08);
  border-radius:9px;
  cursor:pointer;
  font-size:12px;
  font-weight:700;
}
.inspector-grid button:hover{background:var(--orange);border-color:var(--orange)}

.method-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.method-card{
  min-width:0;
  min-height:350px;
  padding:24px;
  background:var(--soft);
  border:1px solid var(--line);
  border-radius:16px;
}
.method-card h3{margin:6px 0 22px;font-size:21px}
.method-card>strong{display:block;font-size:16px}
.method-card>p{color:#4b5a54;font-size:13px}
.method-card ul{margin:18px 0 0;padding-left:18px;color:#33423b;font-size:13px}
.method-card li+li{margin-top:8px}
.metric-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}
.metric-grid article{padding:12px;background:#fff;border-radius:10px}
.metric-grid b{display:block;font-size:21px}
.metric-grid span{color:var(--muted);font-size:11px}
.degree-chart{display:flex;height:120px;align-items:end;gap:5px;margin-top:20px;padding-top:20px;border-top:1px solid var(--line)}
.degree-bar{
  position:relative;
  flex:1;
  min-width:6px;
  max-width:30px;
  height:var(--h);
  min-height:8px;
  background:linear-gradient(180deg,#ff986f,var(--orange));
  border-radius:5px 5px 1px 1px;
}
.degree-bar span{
  position:absolute;
  right:50%;
  bottom:calc(100% + 4px);
  color:#6c7872;
  font-size:8px;
  transform:translateX(50%);
}
.degree-bar::after{
  content:attr(data-label);
  position:absolute;
  top:calc(100% + 5px);
  left:50%;
  width:54px;
  overflow:hidden;
  color:#738079;
  font-size:8px;
  text-align:center;
  text-overflow:ellipsis;
  white-space:nowrap;
  transform:translateX(-50%);
}
.route-strip{display:flex;flex-wrap:wrap;align-items:center;gap:6px;margin:20px 0}
.route-strip span{padding:7px 9px;background:#fff;border:1px solid var(--line);border-radius:8px;font-size:11px;font-weight:700}
.route-strip i{color:var(--orange);font-style:normal}
.formula{
  padding:12px;
  color:#fff!important;
  background:var(--green);
  border-radius:10px;
  font-size:12px!important;
}
.relation-panel{display:grid;grid-template-columns:230px 1fr;gap:28px;margin-top:14px;padding:24px;background:#fff;border:1px solid var(--line);border-radius:16px}
.relation-panel h3{margin:5px 0 0;font-size:20px}
.relation-list{display:grid;grid-template-columns:repeat(2,1fr);gap:7px}
.relation-item{display:flex;align-items:center;gap:8px;padding:9px 11px;background:var(--soft);border-radius:9px;font-size:12px}
.relation-item b{font-size:12px}
.relation-item i{color:var(--orange);font-style:normal}
.relation-item span{margin-left:auto;color:var(--muted);font-size:10px}

.location-filter{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:18px}
.location-filter button{
  border:1px solid var(--line);
  padding:7px 12px;
  color:#4f5d56;
  background:#fff;
  border-radius:999px;
  cursor:pointer;
  font-size:11px;
}
.location-filter button.active,.location-filter button:hover{color:#fff;background:var(--green);border-color:var(--green)}
.location-cards{display:grid;gap:16px}
.location-card{
  scroll-margin-top:76px;
  overflow:hidden;
  border:1px solid #cfd8d3;
  border-radius:16px;
  background:#fff;
}
.location-card[hidden]{display:none}
.location-card-main{display:grid;grid-template-columns:2fr 1fr;min-height:410px}
.location-figure{
  position:relative;
  overflow:hidden;
  min-height:410px;
  margin:0;
  background:#07100d;
  cursor:zoom-in;
}
.location-figure img{width:100%;height:100%;object-fit:cover;transition:transform .35s}
.location-figure:hover img{transform:scale(1.02)}
.location-figure::after{content:"点击放大";position:absolute;top:16px;right:16px;padding:6px 9px;color:#fff;background:rgba(7,24,19,.72);border-radius:7px;font-size:10px;opacity:0;transition:.18s}
.location-figure:hover::after{opacity:1}
.location-figure figcaption{position:absolute;right:0;bottom:0;left:0;padding:45px 18px 14px;color:#fff;background:linear-gradient(transparent,rgba(4,17,13,.92));font-size:12px}
.location-figure figcaption b{display:block;font-size:13px}
.location-copy{display:flex;flex-direction:column;padding:23px}
.location-title{display:flex;align-items:start;gap:10px;padding-bottom:14px;border-bottom:1px solid var(--line)}
.location-title>span{color:var(--orange);font-size:12px;font-weight:800}
.location-title h3{margin:0;font-size:20px;line-height:1.2}
.location-title small{display:block;margin-top:3px;color:var(--muted);font-size:11px}
.location-copy section{padding:14px 0;border-bottom:1px solid var(--line)}
.location-copy section:last-of-type{border-bottom:0}
.location-copy section>small{color:#64716b;font-size:10px;font-weight:800;letter-spacing:.11em}
.location-copy section.ai>small{color:var(--orange)}
.location-copy p{margin:5px 0 0;color:#38473f;font-size:13px;line-height:1.65}
.location-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;margin-top:auto;padding-top:12px}
.location-metrics span{padding:8px;background:var(--soft);border-radius:8px;color:var(--muted);font-size:10px}
.location-metrics b{display:block;color:var(--ink);font-size:14px}

.sources{margin-top:24px;padding:36px;color:#fff;background:var(--green);border-radius:18px}
.sources p{max-width:900px;color:#cbded7}
.sources>div{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.sources a{padding:9px 13px;text-decoration:none;border:1px solid rgba(255,255,255,.26);border-radius:9px;font-size:12px;font-weight:700}
.sources a:first-child{color:#fff;background:var(--orange);border-color:var(--orange)}

.node-preview{
  position:fixed;
  z-index:90;
  overflow:hidden;
  width:min(672px,calc(100vw - 28px));
  height:min(330px,calc(100vh - 28px));
  margin:0;
  pointer-events:none;
  color:#fff;
  background:#07110e;
  border:3px solid #fff;
  border-radius:18px;
  box-shadow:0 28px 90px rgba(0,0,0,.32);
}
.node-preview[hidden]{display:none}
.node-preview img{width:100%;height:100%;object-fit:cover}
.node-preview figcaption{position:absolute;right:0;bottom:0;left:0;padding:54px 20px 16px;background:linear-gradient(transparent,rgba(4,20,15,.92))}
.node-preview strong{display:block;font-size:18px}
.node-preview span{font-size:11px;color:#d9e7e1}

.image-lightbox{
  width:min(1400px,94vw);
  height:min(900px,92vh);
  padding:0;
  color:#fff;
  background:#07110e;
  border:0;
  border-radius:18px;
  box-shadow:var(--shadow);
}
.image-lightbox::backdrop{background:rgba(3,14,11,.86);backdrop-filter:blur(8px)}
.image-lightbox>button{position:absolute;z-index:3;top:14px;right:14px;width:40px;height:40px;border:0;color:#fff;background:rgba(0,0,0,.58);border-radius:50%;cursor:pointer;font-size:22px}
.image-lightbox figure{display:flex;width:100%;height:100%;margin:0;flex-direction:column}
.image-lightbox img{width:100%;min-height:0;flex:1;object-fit:contain}
.image-lightbox figcaption{padding:12px 20px;color:#d9e5df;font-size:12px}

.empty-state{padding:80px 20px;text-align:center}
.empty-state h1{font-size:30px}
.empty-state a{color:var(--orange)}

@media(max-width:1120px){
  .hero{grid-template-columns:1fr}
  .hero-metrics{grid-template-columns:repeat(4,1fr)}
  .hero-metrics article{min-height:105px}
  .method-grid{grid-template-columns:1fr}
  .method-card{min-height:auto}
  .location-card-main{grid-template-columns:1.55fr 1fr}
  .relation-panel{grid-template-columns:1fr}
}

@media(max-width:820px){
  body{font-size:14px}
  .site-topbar{grid-template-columns:1fr auto;padding:0 16px}
  .site-topbar>span{display:none}
  .site-topbar nav{gap:12px}
  .site-topbar nav a{font-size:11px}
  main{width:min(100% - 24px,1500px);padding-top:12px}
  .hero-copy{padding:34px 26px}
  .hero-metrics{grid-template-columns:repeat(2,1fr);padding:12px}
  .scope-note{grid-template-columns:1fr;gap:5px}
  .section-block{padding:18px 12px}
  .section-head{display:block}
  .section-head>p{width:auto;margin-top:10px;text-align:left}
  .network-canvas{height:720px}
  .network-node{width:132px;min-height:64px;padding:9px}
  .network-node b{font-size:12px}
  .inspector-grid{grid-template-columns:1fr}
  .relation-list{grid-template-columns:1fr}
  .location-card-main{grid-template-columns:1fr}
  .location-figure{min-height:300px}
  .location-copy{padding:18px}
}

@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition:none!important}
}