/* 葬AI Web4 — design system
   中文 AI 行业评论媒体 · 独立 · 尖锐 · 有态度
   纯静态，零构建 */

:root {
  --bg: #0c0c0e;
  --bg-soft: #141417;
  --bg-card: #16161a;
  --bg-elev: #1d1d22;
  --line: #2a2a31;
  --line-soft: #202026;
  --ink: #ededf0;
  --ink-dim: #a7a7b0;
  --ink-faint: #6c6c78;
  --accent: #ff3b3b;        /* 葬 · 尖锐红 */
  --accent-dim: #b32a2a;
  --gold: #e7b84b;
  --product: #5ad1c7;
  --founder: #f5a623;
  --vc: #b388ff;
  --company: #6ea8ff;
  --maxw: 1120px;
  --radius: 4px;
  --mono: "SF Mono", "JetBrains Mono", "Roboto Mono", ui-monospace, Menlo, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
          "Microsoft YaHei", "Segoe UI", Roboto, system-ui, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }

::selection { background: var(--accent); color: #fff; }

/* scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--line); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--ink-faint); }

/* ---------- layout ---------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- top nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(12,12,14,.82);
  backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--line-soft);
}
.nav-inner {
  max-width: var(--maxw); margin: 0 auto;
  display: flex; align-items: center; gap: 28px;
  padding: 0 24px; height: 58px;
}
.brand { display: flex; align-items: baseline; gap: 9px; font-weight: 800; letter-spacing: .5px; }
.brand .mark {
  display: inline-grid; place-items: center;
  width: 26px; height: 26px; border-radius: 5px;
  background: var(--accent); color: #fff; font-size: 15px; font-weight: 900;
  transform: translateY(3px);
}
.brand .name { font-size: 17px; }
.brand .web4 {
  font-family: var(--mono); font-size: 11px; color: var(--accent);
  border: 1px solid var(--accent-dim); border-radius: 3px;
  padding: 1px 5px; transform: translateY(-1px);
}
.nav-links { display: flex; gap: 22px; margin-left: auto; font-size: 14px; }
.nav-links a { color: var(--ink-dim); font-weight: 600; transition: color .15s; }
.nav-links a:hover, .nav-links a.active { color: var(--ink); }
.nav-links a.active { color: var(--accent); }

/* ---------- footer ---------- */
.foot {
  border-top: 1px solid var(--line-soft);
  margin-top: 72px; padding: 36px 0 56px;
  color: var(--ink-faint); font-size: 13px;
}
.foot .wrap { display: flex; flex-wrap: wrap; gap: 16px; justify-content: space-between; align-items: center; }
.foot a { color: var(--ink-dim); }
.foot .mono { font-family: var(--mono); }

/* ---------- hero / home ---------- */
.hero { padding: 92px 0 56px; position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(800px 380px at 78% -8%, rgba(255,59,59,.12), transparent 60%),
    radial-gradient(620px 320px at 8% 18%, rgba(110,168,255,.07), transparent 60%);
  pointer-events: none;
}
.hero .wrap { position: relative; }
.eyebrow {
  font-family: var(--mono); font-size: 12.5px; letter-spacing: 2px;
  color: var(--accent); text-transform: uppercase; margin: 0 0 18px;
}
.hero h1 {
  font-size: clamp(40px, 7vw, 76px); line-height: 1.04; margin: 0 0 22px;
  font-weight: 900; letter-spacing: -1px;
}
.hero h1 .slash { color: var(--accent); }
.hero .lede {
  font-size: clamp(16px, 2vw, 19px); color: var(--ink-dim);
  max-width: 640px; margin: 0 0 34px; line-height: 1.75;
}
.cta-row { display: flex; flex-wrap: wrap; gap: 14px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 20px; border-radius: var(--radius);
  font-weight: 700; font-size: 14.5px; border: 1px solid transparent;
  transition: transform .12s, background .15s, border-color .15s;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #ff5252; color: #fff; }
.btn-ghost { border-color: var(--line); color: var(--ink); background: var(--bg-soft); }
.btn-ghost:hover { border-color: var(--ink-faint); color: var(--ink); }

/* stats */
.stats { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; margin: 60px 0 12px; }
.stat {
  background: var(--bg-card); border: 1px solid var(--line-soft);
  border-radius: 8px; padding: 24px 22px; position: relative; overflow: hidden;
}
.stat::after {
  content: ""; position: absolute; left: 0; top: 0; width: 3px; height: 100%;
  background: var(--accent); opacity: .8;
}
.stat .num { font-size: 42px; font-weight: 900; font-family: var(--mono); line-height: 1; }
.stat .lab { color: var(--ink-dim); font-size: 13.5px; margin-top: 8px; }

/* section heads */
.sec { padding: 56px 0 8px; }
.sec-head { display: flex; align-items: baseline; gap: 14px; margin-bottom: 24px; }
.sec-head h2 { font-size: 26px; font-weight: 800; margin: 0; letter-spacing: -.4px; }
.sec-head .hash { color: var(--accent); font-family: var(--mono); font-weight: 700; }
.sec-head .more { margin-left: auto; font-size: 13.5px; color: var(--ink-dim); font-weight: 600; }
.sec-head .more:hover { color: var(--accent); }

/* feature cards */
.feat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.feat {
  display: block; background: var(--bg-card); border: 1px solid var(--line-soft);
  border-radius: 10px; padding: 26px; transition: border-color .15s, transform .12s;
}
.feat:hover { border-color: var(--accent-dim); transform: translateY(-2px); color: inherit; }
.feat .ic { font-family: var(--mono); font-size: 12px; color: var(--accent); letter-spacing: 1px; }
.feat h3 { font-size: 19px; margin: 10px 0 8px; font-weight: 800; }
.feat p { margin: 0; color: var(--ink-dim); font-size: 14.5px; }

/* mini article list on home */
.home-arts { display: grid; gap: 2px; }
.home-art {
  display: grid; grid-template-columns: auto 1fr auto; gap: 16px; align-items: center;
  padding: 15px 12px; border-bottom: 1px solid var(--line-soft); transition: background .12s;
}
.home-art:hover { background: var(--bg-soft); }
.home-art .idx { font-family: var(--mono); color: var(--ink-faint); font-size: 13px; }
.home-art .t { font-weight: 600; font-size: 15.5px; }
.home-art .meta { color: var(--ink-faint); font-size: 12.5px; font-family: var(--mono); white-space: nowrap; }

/* ---------- articles list ---------- */
.page-head { padding: 56px 0 28px; }
.page-head h1 { font-size: clamp(30px,5vw,46px); margin: 0 0 10px; font-weight: 900; letter-spacing: -.5px; }
.page-head p { color: var(--ink-dim); margin: 0; max-width: 640px; }

.toolbar { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin: 8px 0 26px; }
.search {
  flex: 1; min-width: 220px; display: flex; align-items: center; gap: 10px;
  background: var(--bg-card); border: 1px solid var(--line); border-radius: 8px; padding: 0 14px;
}
.search input {
  flex: 1; background: none; border: none; outline: none; color: var(--ink);
  font-size: 15px; padding: 12px 0; font-family: var(--sans);
}
.search input::placeholder { color: var(--ink-faint); }
.search .mag { color: var(--ink-faint); }
.filters { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  border: 1px solid var(--line); background: var(--bg-card); color: var(--ink-dim);
  padding: 9px 15px; border-radius: 999px; font-size: 13.5px; font-weight: 600;
  cursor: pointer; transition: all .14s; white-space: nowrap;
}
.chip:hover { border-color: var(--ink-faint); color: var(--ink); }
.chip.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.count-line { color: var(--ink-faint); font-size: 13px; font-family: var(--mono); margin-bottom: 18px; }

.art-list { display: grid; gap: 1px; }
.art-row {
  display: grid; grid-template-columns: 64px 1fr; gap: 20px; align-items: start;
  padding: 20px 14px; border-bottom: 1px solid var(--line-soft);
  transition: background .12s; border-radius: 6px;
}
.art-row:hover { background: var(--bg-soft); }
.art-row .num { font-family: var(--mono); font-size: 14px; color: var(--ink-faint); padding-top: 3px; }
.art-row h3 { margin: 0 0 7px; font-size: 18px; font-weight: 700; line-height: 1.4; }
.art-row .meta { display: flex; gap: 14px; flex-wrap: wrap; font-size: 12.5px; color: var(--ink-faint); font-family: var(--mono); }
.art-row .au { color: var(--ink-dim); }
.art-row .ex { margin: 9px 0 0; color: var(--ink-dim); font-size: 14px; line-height: 1.6;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.author-tag { padding: 1px 7px; border-radius: 3px; border: 1px solid var(--line); }
.empty { padding: 60px 0; text-align: center; color: var(--ink-faint); }

/* ---------- article detail ---------- */
.art-wrap { max-width: 760px; margin: 0 auto; padding: 0 24px; }
.crumb { font-family: var(--mono); font-size: 12.5px; color: var(--ink-faint); padding: 40px 0 0; }
.crumb a:hover { color: var(--accent); }
.art-head { padding: 18px 0 26px; border-bottom: 1px solid var(--line); margin-bottom: 38px; }
.art-head h1 { font-size: clamp(26px,4vw,38px); line-height: 1.25; margin: 8px 0 18px; font-weight: 900; letter-spacing: -.4px; }
.art-head .meta { display: flex; flex-wrap: wrap; gap: 16px; font-size: 13.5px; color: var(--ink-dim); font-family: var(--mono); }
.art-head .meta b { color: var(--ink); }

.prose { font-size: 17px; line-height: 1.85; color: #dcdce2; }
.prose > *:first-child { margin-top: 0; }
.prose h1, .prose h2, .prose h3 { color: var(--ink); font-weight: 800; line-height: 1.35; margin: 1.9em 0 .7em; }
.prose h1 { font-size: 1.7em; }
.prose h2 { font-size: 1.4em; padding-bottom: .25em; border-bottom: 1px solid var(--line-soft); }
.prose h3 { font-size: 1.18em; }
.prose p { margin: 1.1em 0; }
.prose a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--accent-dim); }
.prose a:hover { text-decoration-color: var(--accent); }
.prose strong { color: var(--ink); font-weight: 700; }
.prose em { color: var(--gold); font-style: normal; }
.prose ul, .prose ol { padding-left: 1.4em; margin: 1.1em 0; }
.prose li { margin: .45em 0; }
.prose blockquote {
  margin: 1.4em 0; padding: 4px 0 4px 20px; border-left: 3px solid var(--accent);
  color: var(--ink-dim); font-style: italic;
}
.prose hr { border: none; border-top: 1px solid var(--line); margin: 2.4em 0; }
.prose code {
  font-family: var(--mono); font-size: .88em; background: var(--bg-elev);
  padding: 2px 6px; border-radius: 4px; color: var(--gold);
}
.prose pre {
  background: var(--bg-elev); border: 1px solid var(--line-soft); border-radius: 8px;
  padding: 16px 18px; overflow-x: auto; margin: 1.3em 0;
}
.prose pre code { background: none; padding: 0; color: #d4d4dc; }
.prose img { max-width: 100%; border-radius: 8px; }
.prose table { width: 100%; border-collapse: collapse; margin: 1.3em 0; font-size: .92em; }
.prose th, .prose td { border: 1px solid var(--line); padding: 8px 12px; text-align: left; }
.prose th { background: var(--bg-elev); }

/* article entity panel */
.ent-box { margin: 44px 0 0; padding: 22px; background: var(--bg-card); border: 1px solid var(--line-soft); border-radius: 10px; }
.ent-box h4 { margin: 0 0 14px; font-size: 14px; font-family: var(--mono); color: var(--accent); letter-spacing: 1px; }
.ent-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.ent { font-size: 13px; padding: 5px 11px; border-radius: 999px; border: 1px solid var(--line); color: var(--ink-dim); }
.ent .dot { display: inline-block; width: 7px; height: 7px; border-radius: 50%; margin-right: 6px; vertical-align: middle; }

/* prev/next */
.art-nav { display: flex; justify-content: space-between; gap: 14px; margin: 48px 0 0; padding-top: 28px; border-top: 1px solid var(--line); }
.art-nav a {
  flex: 1; max-width: 48%; padding: 16px 18px; border: 1px solid var(--line-soft);
  border-radius: 10px; transition: border-color .15s; background: var(--bg-card);
}
.art-nav a:hover { border-color: var(--accent-dim); color: inherit; }
.art-nav .dir { font-family: var(--mono); font-size: 11.5px; color: var(--ink-faint); }
.art-nav .tt { font-weight: 700; font-size: 14.5px; margin-top: 4px; display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; }
.art-nav a.next { text-align: right; margin-left: auto; }

/* ---------- graph page ---------- */
.graph-layout { display: grid; grid-template-columns: 1fr 320px; gap: 0; height: calc(100vh - 58px); }
@media (max-width: 900px) { .graph-layout { grid-template-columns: 1fr; height: auto; } }

.graph-stage { position: relative; background:
  radial-gradient(900px 600px at 50% 40%, #131318, var(--bg)); overflow: hidden; }
#graph-svg { width: 100%; height: 100%; display: block; cursor: grab; }
#graph-svg:active { cursor: grabbing; }
@media (max-width: 900px) { .graph-stage { height: 70vh; } }

.graph-overlay { position: absolute; top: 16px; left: 16px; right: 16px; display: flex; justify-content: space-between; gap: 12px; pointer-events: none; }
.glabel { pointer-events: auto; }
.glabel h1 { font-size: 18px; margin: 0; font-weight: 800; }
.glabel p { margin: 4px 0 0; font-size: 12.5px; color: var(--ink-dim); font-family: var(--mono); }
.legend { display: flex; gap: 14px; flex-wrap: wrap; pointer-events: auto; align-self: flex-start; background: rgba(20,20,23,.7); padding: 8px 12px; border-radius: 8px; border: 1px solid var(--line-soft); }
.legend span { font-size: 12px; color: var(--ink-dim); display: flex; align-items: center; gap: 6px; cursor: pointer; }
.legend i { width: 9px; height: 9px; border-radius: 50%; display: inline-block; }
.legend span.off { opacity: .35; }

.graph-tools { position: absolute; bottom: 16px; left: 16px; display: flex; gap: 8px; }
.graph-tools button {
  width: 36px; height: 36px; border-radius: 8px; border: 1px solid var(--line);
  background: rgba(20,20,23,.85); color: var(--ink); font-size: 18px; cursor: pointer;
  display: grid; place-items: center; transition: border-color .15s;
}
.graph-tools button:hover { border-color: var(--accent); color: var(--accent); }

.search-graph {
  position: absolute; bottom: 16px; right: 16px; width: 240px;
  background: rgba(20,20,23,.9); border: 1px solid var(--line); border-radius: 8px;
  display: flex; align-items: center; padding: 0 12px;
}
.search-graph input { flex: 1; background: none; border: none; outline: none; color: var(--ink); padding: 10px 0; font-size: 13.5px; }

/* side panel: leaderboards + node detail */
.graph-side { background: var(--bg-soft); border-left: 1px solid var(--line); overflow-y: auto; }
.side-pad { padding: 20px; }
.lb-tabs { display: flex; gap: 4px; margin-bottom: 16px; flex-wrap: wrap; }
.lb-tab {
  flex: 1; min-width: 64px; text-align: center; padding: 8px 4px; font-size: 12.5px; font-weight: 700;
  border: 1px solid var(--line-soft); border-radius: 7px; cursor: pointer; color: var(--ink-dim);
  background: var(--bg-card); transition: all .14s;
}
.lb-tab:hover { color: var(--ink); }
.lb-tab.active { color: #fff; }
.lb-tab[data-seg="products"].active { background: var(--product); border-color: var(--product); color: #06201d; }
.lb-tab[data-seg="founders"].active { background: var(--founder); border-color: var(--founder); color: #2b1c00; }
.lb-tab[data-seg="vcs"].active { background: var(--vc); border-color: var(--vc); color: #1a1030; }
.lb-tab[data-seg="companies"].active { background: var(--company); border-color: var(--company); color: #04183a; }

.lb-list { display: flex; flex-direction: column; gap: 2px; }
.lb-row {
  display: grid; grid-template-columns: 26px 1fr auto; gap: 10px; align-items: center;
  padding: 9px 10px; border-radius: 7px; cursor: pointer; transition: background .12s;
}
.lb-row:hover { background: var(--bg-elev); }
.lb-row .rk { font-family: var(--mono); font-size: 13px; color: var(--ink-faint); font-weight: 700; }
.lb-row.top3 .rk { color: var(--gold); }
.lb-row .nm { font-weight: 600; font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lb-row .nm small { display: block; color: var(--ink-faint); font-size: 11.5px; font-weight: 400; font-family: var(--mono); }
.lb-row .sc { font-family: var(--mono); font-size: 12px; color: var(--ink-dim); }

.side-head { font-size: 13px; font-family: var(--mono); color: var(--accent); letter-spacing: 1px; margin: 0 0 12px; text-transform: uppercase; }

#node-detail { display: none; }
#node-detail.show { display: block; }
.nd-type { display: inline-block; font-size: 11px; font-family: var(--mono); padding: 2px 8px; border-radius: 999px; margin-bottom: 8px; }
.nd-name { font-size: 20px; font-weight: 800; margin: 0 0 6px; }
.nd-desc { font-size: 13.5px; color: var(--ink-dim); line-height: 1.6; margin: 0 0 14px; }
.nd-stats { display: flex; gap: 16px; margin-bottom: 14px; }
.nd-stats div { font-family: var(--mono); }
.nd-stats .v { font-size: 18px; font-weight: 800; }
.nd-stats .k { font-size: 11px; color: var(--ink-faint); }
.nd-rels { font-size: 13px; }
.nd-rels .r { padding: 6px 0; border-bottom: 1px solid var(--line-soft); color: var(--ink-dim); }
.nd-rels .r b { color: var(--ink); }
.nd-rels .rt { font-family: var(--mono); font-size: 11px; color: var(--accent); }
.nd-back { font-size: 12.5px; color: var(--ink-faint); cursor: pointer; margin-bottom: 14px; display: inline-block; }
.nd-back:hover { color: var(--accent); }
.nd-articles { margin-top: 12px; }
.nd-articles a { display: inline-block; font-family: var(--mono); font-size: 11.5px; color: var(--ink-dim); border: 1px solid var(--line-soft); border-radius: 5px; padding: 2px 7px; margin: 0 5px 5px 0; }
.nd-articles a:hover { border-color: var(--accent); color: var(--accent); }

#graph-tooltip {
  position: fixed; pointer-events: none; z-index: 200; display: none;
  background: rgba(15,15,18,.96); border: 1px solid var(--line); border-radius: 7px;
  padding: 8px 11px; font-size: 12.5px; max-width: 240px; box-shadow: 0 8px 30px rgba(0,0,0,.5);
}
#graph-tooltip .tn { font-weight: 700; }
#graph-tooltip .td { color: var(--ink-faint); font-family: var(--mono); font-size: 11px; }

@media (max-width: 640px) {
  .feat-grid { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr; }
  .nav-links { gap: 16px; }
  .art-row { grid-template-columns: 1fr; gap: 6px; }
  .art-row .num { padding-top: 0; }
}