.nodes-intro{
  background:linear-gradient(180deg,var(--hero-top),var(--hero-bottom));
  padding-top:76px;
  padding-bottom:82px;
}
.nodes-intro-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,.9fr);
  align-items:center;
  gap:clamp(28px,5vw,80px);
}
.nodes-intro-copy h1{
  margin:18px 0 24px;
  max-width:660px;
}
.nodes-intro-lede{
  max-width:620px;
  color:var(--text-muted);
  font-size:18px;
  line-height:1.8;
}
.nodes-intro-copy .fact-pills{margin-top:28px}
.nodes-intro-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.nodes-board{
  min-width:0;
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  background:var(--bg-panel);
  box-shadow:inset 0 1px 0 var(--highlight),0 34px 70px -34px var(--shadow-tint-strong);
  overflow:hidden;
}
.nodes-board-head{
  display:flex;
  align-items:center;
  gap:12px;
  min-height:52px;
  padding:10px 20px;
  background:var(--titlebar-b);
  border-bottom:1px solid var(--line-soft);
  font-size:13px;
}
.nodes-board-head > span:last-child{
  margin-left:auto;
  color:var(--text-muted);
  font-size:12px;
}
.nodes-board-dots{display:flex;gap:6px}
.nodes-board-dots i{
  display:block;
  width:9px;
  height:9px;
  border-radius:var(--r-pill);
  background:var(--dot-a);
}
.nodes-board-dots i:nth-child(2){background:var(--dot-b)}
.nodes-board-dots i:nth-child(3){background:var(--dot-c)}
.nodes-board-body{padding:12px 20px}
.nodes-board-item{
  display:grid;
  grid-template-columns:60px minmax(0,1fr);
  align-items:baseline;
  column-gap:12px;
  padding:15px 0;
  border-bottom:1px solid var(--line-soft);
}
.nodes-board-item:last-child{border-bottom:0}
.nodes-board-item > span{
  grid-row:span 2;
  font-weight:700;
  color:var(--accent-dark);
}
.nodes-board-item strong{font-size:15px}
.nodes-board-item em{
  font:11px var(--f-mono);
  font-style:normal;
  color:var(--text-muted);
  overflow-wrap:anywhere;
}
.nodes-board-foot{
  padding:13px 20px;
  background:var(--bg-panel-2);
  color:var(--text-muted);
  font-size:12px;
}
.nodes-content{padding-top:22px;padding-bottom:32px}
.nodes-content > .toc-tabs{top:12px}
.nodes-section{border-bottom:1px solid var(--border)}
.nodes-section:last-child{border-bottom:0}
.nodes-section h2{margin:12px 0 0}
.nodes-regions{display:grid;gap:42px}
.nodes-region{min-width:0}
.nodes-region-head{
  display:grid;
  grid-template-columns:minmax(140px,.33fr) minmax(0,1fr);
  align-items:end;
  gap:24px;
  margin-bottom:18px;
}
.nodes-region-head h3{margin:6px 0 0}
.nodes-region-head p{color:var(--text-muted);line-height:1.75}
.nodes-region .data-table td:last-child{color:var(--text-muted)}
.nodes-list-note{margin-top:34px}
.nodes-type-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.nodes-type-card{min-width:0;padding:28px}
.nodes-type-card h3{margin:20px 0 18px}
.nodes-type-card p{color:var(--text-muted);line-height:1.85}
.nodes-type-card p + p{margin-top:18px}
.nodes-type-tail{
  max-width:860px;
  margin-top:28px;
  padding-left:18px;
  border-left:3px solid var(--accent-line);
  color:var(--text-muted);
}
.nodes-choice-list{border-top:1px solid var(--border)}
.nodes-choice{
  display:grid;
  grid-template-columns:minmax(180px,.34fr) minmax(0,1fr);
  gap:32px;
  padding:30px 0;
  border-bottom:1px solid var(--border);
}
.nodes-choice-label > span{
  display:inline-flex;
  min-height:30px;
  align-items:center;
  padding:3px 12px;
  border-radius:var(--r-pill);
  background:var(--bg-panel-2);
  color:var(--accent-dark);
  font-size:13px;
  font-weight:700;
}
.nodes-choice h3{margin:12px 0 0;font-size:20px}
.nodes-choice > p{color:var(--text-muted);line-height:1.85}
.nodes-check-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.nodes-check-card{padding:26px;min-width:0}
.nodes-check-card h3{margin:0 0 16px;font-size:19px}
.nodes-check-card p{color:var(--text-muted);line-height:1.8}
.nodes-check-card a,.nodes-end-note a{
  color:var(--accent-dark);
  text-decoration:underline;
  text-underline-offset:3px;
}
.nodes-end-note{margin-top:24px}
@media(max-width:960px){
  .nodes-intro-grid{grid-template-columns:1fr}
  .nodes-board{max-width:680px}
  .nodes-type-grid{grid-template-columns:1fr}
}
@media(max-width:768px){
  .nodes-intro{padding-top:52px;padding-bottom:56px}
  .nodes-region-head,.nodes-choice{grid-template-columns:1fr;gap:10px}
  .nodes-check-grid{grid-template-columns:1fr}
}
@media(max-width:480px){
  .nodes-intro-lede{font-size:16px}
  .nodes-board-head > span:last-child{display:none}
  .nodes-board-item{grid-template-columns:44px minmax(0,1fr);column-gap:8px}
  .nodes-board-item strong{font-size:13px}
  .nodes-type-card,.nodes-check-card{padding:22px}
}