/* ===== 葬AI Web4 — 重构主题 ===== */
:root {
  --bg: #0a0a0b;
  --bg-soft: #121214;
  --bg-card: #161618;
  --line: #26262a;
  --line-soft: #1d1d20;
  --ink: #ededee;
  --ink-soft: #9a9aa2;
  --ink-faint: #6a6a72;
  --accent: #ff3b30;       /* 尖锐的血红 */
  --accent-soft: #ff6b61;
  --product: #ff3b30;
  --founder: #ffb020;
  --company: #4d8dff;
  --vc: #2ee6a6;
  --maxw: 1180px;
  --mono: "SF Mono", "JetBrains Mono", ui-monospace, "Cascadia Code", Menlo, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

/* ---- Header / nav ---- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10,10,11,.82);
  backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav {
  max-width: var(--maxw); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px;
}
.brand { display: flex; align-items: baseline; gap: 10px; font-weight: 800; letter-spacing: -.02em; }
.brand .mark {
  font-family: var(--mono); font-size: 13px; font-weight: 700;
  color: var(--bg); background: var(--accent);
  padding: 2px 7px; border-radius: 4px; letter-spacing: 0;
  transform: skewX(-8deg); display: inline-block;
}
.brand .name { font-size: 18px; }
.brand .ver { font-size: 12px; color: var(--ink-faint); font-family: var(--mono); }
.nav-links { display: flex; gap: 4px; align-items: center; }
.nav-links a {
  font-size: 14px; color: var(--ink-soft);
  padding: 7px 14px; border-radius: 7px; transition: .15s;
}
.nav-links a:hover { color: var(--ink); background: var(--bg-card); }
.nav-links a.active { color: var(--accent); }

/* ---- generic container ---- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.footer {
  border-top: 1px solid var(--line); margin-top: 90px;
  color: var(--ink-faint); font-size: 13px;
}
.footer .wrap { padding-top: 40px; padding-bottom: 60px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 20px; }
.footer .mono { font-family: var(--mono); }

/* ===================== HOME ===================== */
.hero { padding: 90px 0 50px; border-bottom: 1px solid var(--line-soft); }
.hero .eyebrow {
  font-family: var(--mono); font-size: 12px; letter-spacing: .22em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 22px;
}
.hero h1 {
  font-size: clamp(40px, 7vw, 82px); line-height: 1.02; margin: 0 0 26px;
  font-weight: 900; letter-spacing: -.03em;
}
.hero h1 .slash { color: var(--accent); }
.hero .lede { font-size: clamp(17px, 2.2vw, 21px); color: var(--ink-soft); max-width: 640px; }
.hero .cta { margin-top: 38px; display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 15px; font-weight: 600; padding: 12px 22px; border-radius: 9px;
  border: 1px solid var(--line); transition: .18s;
}
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-soft); }
.btn-ghost:hover { border-color: var(--ink-soft); background: var(--bg-card); }

.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; margin: 56px 0; }
.stat { background: var(--bg-soft); padding: 34px 28px; }
.stat .num { font-family: var(--mono); font-size: clamp(34px, 5vw, 52px); font-weight: 800; letter-spacing: -.02em; }
.stat .num .accent { color: var(--accent); }
.stat .label { color: var(--ink-soft); font-size: 14px; margin-top: 6px; }

.section-title { font-size: 13px; font-family: var(--mono); letter-spacing: .18em; text-transform: uppercase; color: var(--ink-faint); margin: 70px 0 22px; display: flex; align-items: center; gap: 12px; }
.section-title::after { content: ""; flex: 1; height: 1px; background: var(--line); }

.home-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.feature-card {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: 16px;
  padding: 30px; transition: .2s; position: relative; overflow: hidden;
}
.feature-card:hover { border-color: var(--ink-faint); transform: translateY(-3px); }
.feature-card h3 { margin: 0 0 10px; font-size: 22px; letter-spacing: -.01em; }
.feature-card p { color: var(--ink-soft); margin: 0 0 16px; font-size: 15px; }
.feature-card .go { color: var(--accent); font-weight: 600; font-size: 14px; }

.latest { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.latest a { display: flex; gap: 18px; align-items: baseline; padding: 18px 24px; background: var(--bg-soft); transition: .15s; }
.latest a:hover { background: var(--bg-card); }
.latest .d { font-family: var(--mono); font-size: 13px; color: var(--ink-faint); white-space: nowrap; }
.latest .t { font-weight: 600; flex: 1; }
.latest .au { font-size: 13px; color: var(--ink-soft); white-space: nowrap; }

/* ===================== ARTICLES LIST ===================== */
.page-head { padding: 64px 0 34px; }
.page-head h1 { font-size: clamp(34px, 5vw, 52px); margin: 0 0 12px; font-weight: 900; letter-spacing: -.02em; }
.page-head p { color: var(--ink-soft); margin: 0; }

.toolbar { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; margin: 6px 0 30px; }
.search-box { flex: 1; min-width: 240px; position: relative; }
.search-box input {
  width: 100%; background: var(--bg-card); border: 1px solid var(--line);
  color: var(--ink); padding: 12px 16px 12px 42px; border-radius: 10px; font-size: 15px; font-family: var(--sans);
}
.search-box input:focus { outline: none; border-color: var(--accent); }
.search-box .ico { position: absolute; left: 15px; top: 50%; transform: translateY(-50%); color: var(--ink-faint); }
.filters { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  font-size: 13px; padding: 8px 16px; border-radius: 999px;
  border: 1px solid var(--line); color: var(--ink-soft); cursor: pointer; transition: .15s; background: transparent;
  font-family: var(--sans);
}
.chip:hover { color: var(--ink); border-color: var(--ink-faint); }
.chip.active { background: var(--accent); color: #fff; border-color: var(--accent); }

.art-list { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.art-row {
  display: grid; grid-template-columns: 64px 110px 1fr auto; gap: 18px; align-items: baseline;
  padding: 20px 24px; background: var(--bg-soft); transition: .15s;
}
.art-row:hover { background: var(--bg-card); }
.art-row .idx { font-family: var(--mono); color: var(--ink-faint); font-size: 13px; }
.art-row .date { font-family: var(--mono); color: var(--ink-faint); font-size: 13px; }
.art-row .title { font-weight: 600; font-size: 17px; letter-spacing: -.01em; }
.art-row .au { font-size: 13px; }
.au-badge { font-size: 12px; padding: 3px 10px; border-radius: 999px; border: 1px solid var(--line); color: var(--ink-soft); white-space: nowrap; }
.au-badge.a0 { color: var(--accent); border-color: rgba(255,59,48,.4); }
.au-badge.a1 { color: var(--company); border-color: rgba(77,141,255,.4); }
.au-badge.a2 { color: var(--vc); border-color: rgba(46,230,166,.4); }
.empty { padding: 60px; text-align: center; color: var(--ink-faint); background: var(--bg-soft); }
.count-note { color: var(--ink-faint); font-size: 13px; font-family: var(--mono); margin: -14px 0 18px; }

/* ===================== ARTICLE DETAIL ===================== */
.article { max-width: 760px; margin: 0 auto; padding: 60px 24px 0; }
.article .back { font-family: var(--mono); font-size: 13px; color: var(--ink-soft); display: inline-block; margin-bottom: 34px; }
.article .back:hover { color: var(--accent); }
.article-meta { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; color: var(--ink-faint); font-family: var(--mono); font-size: 13px; margin-bottom: 18px; }
.article h1.title { font-size: clamp(28px, 4.5vw, 44px); line-height: 1.15; margin: 0 0 30px; font-weight: 900; letter-spacing: -.02em; }
.article-divider { height: 2px; background: var(--accent); width: 56px; margin: 0 0 40px; border: 0; }

.prose { font-size: 17px; line-height: 1.85; color: #d7d7da; }
.prose h1, .prose h2, .prose h3, .prose h4 { color: var(--ink); line-height: 1.3; margin: 1.8em 0 .7em; letter-spacing: -.01em; font-weight: 800; }
.prose h1 { font-size: 1.7em; } .prose h2 { font-size: 1.42em; } .prose h3 { font-size: 1.2em; }
.prose h2 { padding-bottom: .3em; border-bottom: 1px solid var(--line); }
.prose p { margin: 1.1em 0; }
.prose a { color: var(--accent-soft); text-decoration: underline; text-underline-offset: 3px; }
.prose strong { color: #fff; }
.prose em { color: var(--ink); }
.prose blockquote { margin: 1.4em 0; padding: 6px 22px; border-left: 3px solid var(--accent); color: var(--ink-soft); background: var(--bg-soft); border-radius: 0 8px 8px 0; }
.prose ul, .prose ol { padding-left: 1.4em; }
.prose li { margin: .45em 0; }
.prose code { font-family: var(--mono); font-size: .88em; background: var(--bg-card); padding: 2px 6px; border-radius: 5px; border: 1px solid var(--line); }
.prose pre { background: var(--bg-soft); border: 1px solid var(--line); border-radius: 10px; padding: 18px; overflow-x: auto; }
.prose pre code { background: none; border: 0; padding: 0; }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 2.2em 0; }
.prose img { border-radius: 10px; border: 1px solid var(--line); }
.prose table { width: 100%; border-collapse: collapse; margin: 1.4em 0; font-size: .92em; }
.prose th, .prose td { border: 1px solid var(--line); padding: 9px 12px; text-align: left; }
.prose th { background: var(--bg-card); }

.art-nav { display: flex; justify-content: space-between; gap: 16px; margin: 70px 0 0; border-top: 1px solid var(--line); padding-top: 28px; }
.art-nav a { flex: 1; padding: 18px 20px; border: 1px solid var(--line); border-radius: 12px; transition: .15s; background: var(--bg-soft); }
.art-nav a:hover { border-color: var(--ink-faint); background: var(--bg-card); }
.art-nav .dir { font-family: var(--mono); font-size: 12px; color: var(--ink-faint); }
.art-nav .t { font-weight: 600; font-size: 15px; margin-top: 4px; }
.art-nav a.next { text-align: right; }
.art-nav a.disabled { opacity: .3; pointer-events: none; }

/* related entities in article */
.entity-box { margin: 50px 0 0; padding: 24px; background: var(--bg-soft); border: 1px solid var(--line); border-radius: 14px; }
.entity-box h4 { margin: 0 0 14px; font-size: 13px; font-family: var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--ink-faint); }
.entity-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.etag { font-size: 13px; padding: 5px 12px; border-radius: 999px; border: 1px solid var(--line); color: var(--ink-soft); }
.etag .dot { display: inline-block; width: 7px; height: 7px; border-radius: 50%; margin-right: 7px; vertical-align: middle; }

/* ===================== GRAPH ===================== */
.graph-layout { display: grid; grid-template-columns: 1fr 360px; gap: 0; height: calc(100vh - 61px); }
.graph-canvas-wrap { position: relative; background: radial-gradient(circle at 50% 40%, #141417 0%, #0a0a0b 70%); border-right: 1px solid var(--line); overflow: hidden; }
#graph-svg { width: 100%; height: 100%; display: block; cursor: grab; }
#graph-svg:active { cursor: grabbing; }
.graph-overlay { position: absolute; top: 18px; left: 18px; z-index: 5; pointer-events: none; }
.graph-overlay h2 { margin: 0; font-size: 20px; font-weight: 900; letter-spacing: -.02em; }
.graph-overlay p { margin: 4px 0 0; color: var(--ink-soft); font-size: 13px; font-family: var(--mono); }
.graph-legend { position: absolute; bottom: 18px; left: 18px; z-index: 5; display: flex; gap: 16px; flex-wrap: wrap; background: rgba(10,10,11,.7); padding: 10px 16px; border-radius: 10px; border: 1px solid var(--line); backdrop-filter: blur(8px); }
.graph-legend span { font-size: 12px; color: var(--ink-soft); display: inline-flex; align-items: center; gap: 7px; }
.graph-legend .dot { width: 9px; height: 9px; border-radius: 50%; }
.graph-controls { position: absolute; top: 18px; right: 18px; z-index: 5; display: flex; flex-direction: column; gap: 8px; }
.graph-controls button { width: 36px; height: 36px; border-radius: 9px; border: 1px solid var(--line); background: rgba(18,18,20,.85); color: var(--ink); font-size: 18px; cursor: pointer; backdrop-filter: blur(8px); transition: .15s; }
.graph-controls button:hover { border-color: var(--ink-faint); color: var(--accent); }
.graph-search { position: absolute; top: 18px; left: 50%; transform: translateX(-50%); z-index: 6; width: min(380px, 60%); }
.graph-search input { width: 100%; background: rgba(18,18,20,.9); border: 1px solid var(--line); color: var(--ink); padding: 10px 16px; border-radius: 10px; font-size: 14px; backdrop-filter: blur(8px); font-family: var(--sans); }
.graph-search input:focus { outline: none; border-color: var(--accent); }

.graph-side { background: var(--bg); overflow-y: auto; }
.side-tabs { display: flex; border-bottom: 1px solid var(--line); position: sticky; top: 0; background: var(--bg); z-index: 4; }
.side-tabs button { flex: 1; padding: 14px 6px; background: none; border: 0; border-bottom: 2px solid transparent; color: var(--ink-soft); font-size: 13px; cursor: pointer; font-family: var(--sans); transition: .15s; }
.side-tabs button:hover { color: var(--ink); }
.side-tabs button.active { color: var(--accent); border-bottom-color: var(--accent); }
.side-panel { padding: 18px; }
.side-panel.hidden { display: none; }

.lb-tabs { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 16px; }
.lb-tabs button { font-size: 12px; padding: 6px 12px; border-radius: 999px; border: 1px solid var(--line); background: transparent; color: var(--ink-soft); cursor: pointer; font-family: var(--sans); transition: .15s; }
.lb-tabs button.active { background: var(--bg-card); color: var(--ink); border-color: var(--ink-faint); }
.lb-list { display: flex; flex-direction: column; gap: 2px; }
.lb-item { display: grid; grid-template-columns: 28px 1fr auto; gap: 10px; align-items: center; padding: 11px 10px; border-radius: 9px; cursor: pointer; transition: .12s; }
.lb-item:hover { background: var(--bg-card); }
.lb-item .rank { font-family: var(--mono); font-size: 13px; color: var(--ink-faint); text-align: center; }
.lb-item .rank.top { color: var(--accent); font-weight: 700; }
.lb-item .nm { font-weight: 600; font-size: 14px; }
.lb-item .nm small { display: block; color: var(--ink-faint); font-weight: 400; font-size: 12px; margin-top: 2px; }
.lb-item .mt { font-family: var(--mono); font-size: 12px; color: var(--ink-soft); text-align: right; }

.node-detail h3 { margin: 0 0 6px; font-size: 20px; letter-spacing: -.01em; }
.node-detail .type-badge { display: inline-block; font-size: 11px; font-family: var(--mono); padding: 3px 9px; border-radius: 999px; margin-bottom: 14px; }
.node-detail .desc { color: var(--ink-soft); font-size: 14px; line-height: 1.7; margin: 0 0 18px; }
.node-detail .metrics { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 8px; margin-bottom: 18px; }
.node-detail .metric { background: var(--bg-soft); border: 1px solid var(--line); border-radius: 9px; padding: 10px; text-align: center; }
.node-detail .metric .v { font-family: var(--mono); font-size: 18px; font-weight: 700; }
.node-detail .metric .k { font-size: 11px; color: var(--ink-faint); margin-top: 2px; }
.node-detail h4 { font-size: 12px; font-family: var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--ink-faint); margin: 18px 0 8px; }
.node-detail .rel { font-size: 13px; padding: 8px 10px; border-radius: 8px; background: var(--bg-soft); margin-bottom: 4px; border: 1px solid var(--line-soft); }
.node-detail .rel .rt { font-family: var(--mono); font-size: 11px; color: var(--accent); }
.node-detail .src-art { display: block; font-size: 13px; padding: 8px 10px; border-radius: 8px; color: var(--ink-soft); transition: .12s; }
.node-detail .src-art:hover { background: var(--bg-card); color: var(--ink); }
.node-detail .placeholder { color: var(--ink-faint); font-size: 14px; padding: 40px 0; text-align: center; }

/* responsive */
@media (max-width: 900px) {
  .home-grid, .stats { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr; }
  .graph-layout { grid-template-columns: 1fr; height: auto; }
  .graph-canvas-wrap { height: 64vh; }
  .graph-side { height: auto; max-height: none; }
  .art-row { grid-template-columns: 1fr; gap: 6px; }
  .art-row .idx, .art-row .date { display: inline; }
}
@media (max-width: 560px) {
  .nav { padding: 12px 16px; }
  .nav-links a { padding: 6px 9px; font-size: 13px; }
  .wrap, .article { padding-left: 16px; padding-right: 16px; }
}