@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;700;900&family=JetBrains+Mono:wght@400;700&family=ZCOOL+QingKe+HuangYou&display=swap');

:root {
  --bg: #0a0a0a;
  --bg-elev: #141414;
  --bg-elev-2: #1c1c1c;
  --border: #2a2a2a;
  --fg: #ececec;
  --fg-dim: #888;
  --fg-mute: #555;
  --red: #ff3b3b;
  --red-deep: #c81a1a;
  --cyan: #00e0c0;
  --yellow: #ffd400;
  --blue: #4f9cff;
  --purple: #b66bff;
  --prod: #00e0c0;
  --founder: #ffd400;
  --vc: #b66bff;
  --company: #4f9cff;
  --serif: 'Noto Serif SC', 'Songti SC', serif;
  --mono: 'JetBrains Mono', ui-monospace, Menlo, monospace;
  --display: 'ZCOOL QingKe HuangYou', 'Noto Serif SC', serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { background: var(--bg); color: var(--fg); font-family: var(--serif); line-height: 1.7; -webkit-font-smoothing: antialiased; }
body { min-height: 100vh; }

a { color: var(--cyan); text-decoration: none; transition: color .15s; }
a:hover { color: var(--red); }

img { max-width: 100%; }

/* Global layout */
.site-nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10,10,10,0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.site-nav-inner {
  max-width: 1200px; margin: 0 auto; padding: 14px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.site-brand {
  font-family: var(--display); font-size: 22px; color: var(--fg); letter-spacing: 2px;
  display: flex; align-items: center; gap: 10px;
}
.site-brand .tomb { color: var(--red); }
.site-brand:hover { color: var(--red); }
.site-nav-links { display: flex; gap: 22px; font-family: var(--mono); font-size: 13px; }
.site-nav-links a { color: var(--fg-dim); }
.site-nav-links a:hover, .site-nav-links a.active { color: var(--red); }
.site-nav-links a.active { border-bottom: 2px solid var(--red); padding-bottom: 2px; }

.site-footer {
  border-top: 1px solid var(--border);
  padding: 30px 24px;
  text-align: center;
  color: var(--fg-mute);
  font-family: var(--mono);
  font-size: 12px;
  margin-top: 60px;
}

.container { max-width: 1200px; margin: 0 auto; padding: 40px 24px; }

/* Hero */
.hero {
  padding: 80px 24px 60px;
  text-align: center;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '葬 AI · WEB4';
  position: absolute; left: 50%; top: 50%;
  transform: translate(-50%,-50%);
  font-family: var(--display); font-size: 22vw;
  color: transparent;
  -webkit-text-stroke: 1px #1f1f1f;
  pointer-events: none; white-space: nowrap;
  letter-spacing: 10px;
}
.hero-tomb { font-size: 80px; line-height: 1; color: var(--red); filter: drop-shadow(0 0 20px rgba(255,59,59,.4)); }
.hero h1 {
  font-family: var(--display); font-size: 68px; letter-spacing: 8px;
  margin-top: 10px; color: var(--fg);
  text-shadow: 0 0 40px rgba(255,59,59,.2);
}
.hero h1 .red { color: var(--red); }
.hero .slogan { font-size: 17px; color: var(--fg-dim); margin-top: 18px; letter-spacing: 4px; font-family: var(--mono); }
.hero .sub { color: var(--fg-dim); margin-top: 14px; max-width: 680px; margin-left: auto; margin-right: auto; font-size: 15px; }

.stats {
  display: flex; justify-content: center; gap: 40px; margin-top: 40px; flex-wrap: wrap;
}
.stat { text-align: center; }
.stat .num { font-family: var(--mono); font-size: 40px; font-weight: 700; color: var(--red); }
.stat .label { font-size: 13px; color: var(--fg-dim); margin-top: 4px; letter-spacing: 2px; font-family: var(--mono); }

.hero-ctas { display: flex; gap: 16px; justify-content: center; margin-top: 40px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; font-family: var(--mono); font-size: 14px; font-weight: 700;
  border: 1px solid var(--border); color: var(--fg); background: var(--bg-elev);
  cursor: pointer; transition: all .2s; letter-spacing: 2px; text-transform: uppercase;
}
.btn:hover { background: var(--red); color: #000; border-color: var(--red); }
.btn-primary { background: var(--red); color: #000; border-color: var(--red); }
.btn-primary:hover { background: #fff; color: #000; border-color: #fff; }
.btn-outline { border-color: var(--cyan); color: var(--cyan); }
.btn-outline:hover { background: var(--cyan); color: #000; }

/* Section headings */
.section { padding: 50px 0; }
.section-title {
  font-family: var(--display); font-size: 32px; letter-spacing: 4px; margin-bottom: 30px;
  border-left: 6px solid var(--red); padding-left: 16px;
}
.section-title small { display: block; font-family: var(--mono); font-size: 12px; color: var(--fg-mute); letter-spacing: 2px; margin-top: 4px; }

/* Cards grid */
.card-grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.card {
  background: var(--bg-elev); border: 1px solid var(--border); padding: 22px;
  transition: all .2s; position: relative; overflow: hidden;
}
.card:hover { border-color: var(--red); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(255,59,59,.12); }
.card h3 { font-size: 18px; margin-bottom: 10px; font-weight: 700; color: var(--fg); }
.card .meta { font-family: var(--mono); font-size: 11px; color: var(--fg-mute); margin-bottom: 10px; letter-spacing: 1px; }
.card p { font-size: 14px; color: var(--fg-dim); line-height: 1.6; }

/* Articles list */
.filters { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 24px; align-items: center; }
.search-input {
  flex: 1; min-width: 220px;
  background: var(--bg-elev); border: 1px solid var(--border); color: var(--fg);
  padding: 10px 14px; font-family: var(--mono); font-size: 14px; outline: none;
}
.search-input:focus { border-color: var(--red); }
.filter-select {
  background: var(--bg-elev); border: 1px solid var(--border); color: var(--fg);
  padding: 10px 14px; font-family: var(--mono); font-size: 13px; cursor: pointer; outline: none;
}
.filter-select:focus { border-color: var(--red); }

.article-list { display: flex; flex-direction: column; gap: 1px; background: var(--border); }
.article-row {
  display: grid; grid-template-columns: 70px 100px 1fr auto; gap: 20px; align-items: center;
  padding: 18px 20px; background: var(--bg-elev); transition: background .15s;
  text-decoration: none; color: inherit;
}
.article-row:hover { background: var(--bg-elev-2); }
.article-row .id { font-family: var(--mono); color: var(--red); font-size: 13px; font-weight: 700; }
.article-row .date { font-family: var(--mono); color: var(--fg-dim); font-size: 12px; }
.article-row .title { font-size: 17px; font-weight: 700; color: var(--fg); }
.article-row:hover .title { color: var(--red); }
.article-row .author { font-family: var(--mono); font-size: 12px; color: var(--fg-mute); text-align: right; min-width: 80px; }
.article-row .author.author-咸鱼 { color: var(--red); }
.article-row .author.author-沐秋 { color: var(--cyan); }
.article-row .author.author-骡子马 { color: var(--yellow); }

.empty { padding: 60px; text-align: center; color: var(--fg-mute); font-family: var(--mono); }

/* Article detail */
.article-wrap { max-width: 780px; margin: 0 auto; padding: 40px 24px 80px; }
.article-header { margin-bottom: 40px; padding-bottom: 24px; border-bottom: 1px solid var(--border); }
.article-header .back { font-family: var(--mono); font-size: 12px; color: var(--fg-mute); margin-bottom: 20px; display: inline-block; }
.article-header .back:hover { color: var(--red); }
.article-header h1 { font-family: var(--serif); font-size: 36px; line-height: 1.4; font-weight: 900; margin-bottom: 18px; }
.article-meta { display: flex; gap: 20px; font-family: var(--mono); font-size: 13px; color: var(--fg-dim); flex-wrap: wrap; }
.article-meta .author-咸鱼 { color: var(--red); }
.article-meta .author-沐秋 { color: var(--cyan); }
.article-meta .author-骡子马 { color: var(--yellow); }

.article-body { font-size: 17px; line-height: 1.9; }
.article-body h1, .article-body h2, .article-body h3, .article-body h4 {
  font-weight: 900; margin: 1.8em 0 .8em; line-height: 1.4;
}
.article-body h1 { font-size: 28px; }
.article-body h2 { font-size: 24px; border-left: 4px solid var(--red); padding-left: 12px; }
.article-body h3 { font-size: 20px; color: var(--cyan); }
.article-body p { margin: 1em 0; }
.article-body strong { color: var(--red); font-weight: 700; }
.article-body em { font-style: italic; color: var(--cyan); }
.article-body ul, .article-body ol { margin: 1em 0; padding-left: 2em; }
.article-body li { margin: .4em 0; }
.article-body blockquote {
  border-left: 4px solid var(--yellow); padding: 10px 20px; margin: 1.4em 0;
  background: var(--bg-elev); color: var(--fg); font-style: italic;
}
.article-body blockquote p { margin: .4em 0; }
.article-body code {
  font-family: var(--mono); font-size: .9em; background: var(--bg-elev); padding: 2px 6px;
  border: 1px solid var(--border); color: var(--yellow);
}
.article-body pre {
  background: var(--bg-elev); border: 1px solid var(--border); padding: 16px; overflow-x: auto;
  margin: 1.4em 0; font-family: var(--mono); font-size: 13px; line-height: 1.6;
}
.article-body pre code { background: none; border: none; padding: 0; color: var(--fg); }
.article-body hr { border: none; border-top: 1px dashed var(--border); margin: 2em 0; }
.article-body a { color: var(--cyan); border-bottom: 1px dashed var(--cyan); }
.article-body img { border-radius: 4px; margin: 1em 0; }
.article-body table { border-collapse: collapse; margin: 1em 0; width: 100%; }
.article-body th, .article-body td { border: 1px solid var(--border); padding: 8px 12px; }
.article-body th { background: var(--bg-elev); }

.article-nav {
  display: flex; justify-content: space-between; gap: 20px; margin-top: 50px; padding-top: 30px;
  border-top: 1px solid var(--border); font-family: var(--mono); font-size: 13px;
}
.article-nav a { color: var(--fg-dim); max-width: 45%; }
.article-nav a:hover { color: var(--red); }
.article-nav .label { font-size: 11px; color: var(--fg-mute); margin-bottom: 4px; }
.article-nav .next { text-align: right; margin-left: auto; }

/* Graph page */
.graph-wrap { display: grid; grid-template-columns: 1fr 360px; gap: 0; height: calc(100vh - 60px); }
.graph-canvas-wrap { position: relative; background: #050505; overflow: hidden; border-right: 1px solid var(--border); }
#graph-canvas { width: 100%; height: 100%; display: block; cursor: grab; }
#graph-canvas.dragging { cursor: grabbing; }
.graph-legend {
  position: absolute; top: 16px; left: 16px; background: rgba(10,10,10,.85);
  border: 1px solid var(--border); padding: 12px 16px; font-family: var(--mono); font-size: 12px;
}
.graph-legend h4 { font-family: var(--display); font-size: 14px; margin-bottom: 8px; letter-spacing: 2px; color: var(--fg); }
.legend-item { display: flex; align-items: center; gap: 8px; margin: 4px 0; color: var(--fg-dim); }
.legend-dot { width: 10px; height: 10px; border-radius: 50%; }
.graph-controls {
  position: absolute; bottom: 16px; left: 16px; display: flex; gap: 8px;
  background: rgba(10,10,10,.85); border: 1px solid var(--border); padding: 8px;
}
.graph-controls button {
  background: var(--bg-elev); border: 1px solid var(--border); color: var(--fg);
  width: 34px; height: 34px; font-family: var(--mono); font-size: 16px; cursor: pointer;
}
.graph-controls button:hover { background: var(--red); color: #000; border-color: var(--red); }
.graph-stats {
  position: absolute; top: 16px; right: 16px; background: rgba(10,10,10,.85);
  border: 1px solid var(--border); padding: 10px 14px; font-family: var(--mono); font-size: 11px; color: var(--fg-dim);
}

.graph-sidebar { overflow-y: auto; background: var(--bg); }
.sidebar-tabs { display: flex; border-bottom: 1px solid var(--border); position: sticky; top: 0; background: var(--bg); z-index: 5; }
.sidebar-tab {
  flex: 1; padding: 14px 8px; font-family: var(--mono); font-size: 12px; text-align: center;
  background: none; border: none; color: var(--fg-dim); cursor: pointer; letter-spacing: 1px;
  border-bottom: 2px solid transparent;
}
.sidebar-tab.active { color: var(--red); border-bottom-color: var(--red); }
.sidebar-tab:hover { color: var(--fg); }
.sidebar-content { padding: 20px; }

.leaderboard { margin-bottom: 20px; }
.leaderboard h3 {
  font-family: var(--display); font-size: 18px; letter-spacing: 3px; margin-bottom: 12px;
  padding-bottom: 6px; border-bottom: 1px solid var(--border);
}
.lb-item {
  display: grid; grid-template-columns: 28px 1fr auto; gap: 10px; padding: 8px 4px;
  border-bottom: 1px solid var(--border); cursor: pointer; align-items: center;
  font-size: 13px;
}
.lb-item:hover { background: var(--bg-elev); }
.lb-rank { font-family: var(--mono); font-weight: 700; color: var(--fg-mute); font-size: 12px; }
.lb-rank.top3 { color: var(--red); }
.lb-name { font-weight: 700; }
.lb-meta { font-family: var(--mono); font-size: 10px; color: var(--fg-mute); }
.lb-item .type-tag { font-size: 10px; padding: 1px 6px; font-family: var(--mono); letter-spacing: 0; }
.type-product { color: var(--prod); }
.type-founder { color: var(--founder); }
.type-vc { color: var(--vc); }
.type-company { color: var(--company); }

.node-detail { }
.node-detail h2 { font-family: var(--display); font-size: 26px; letter-spacing: 2px; margin-bottom: 4px; }
.node-detail .type-badge {
  display: inline-block; font-family: var(--mono); font-size: 10px; padding: 3px 8px;
  background: var(--bg-elev); border: 1px solid var(--border); margin-bottom: 14px; letter-spacing: 1px;
}
.node-detail .desc { color: var(--fg-dim); font-size: 14px; margin-bottom: 18px; line-height: 1.7; }
.node-detail .stat-row { display: flex; gap: 16px; margin-bottom: 18px; font-family: var(--mono); font-size: 12px; }
.node-detail .stat-row .s { display: flex; flex-direction: column; }
.node-detail .stat-row .s .k { color: var(--fg-mute); font-size: 10px; letter-spacing: 1px; }
.node-detail .stat-row .s .v { color: var(--red); font-size: 18px; font-weight: 700; }
.node-detail h4 { font-family: var(--mono); font-size: 11px; letter-spacing: 2px; color: var(--fg-mute); margin: 18px 0 8px; text-transform: uppercase; }
.conn-list { font-size: 13px; }
.conn-item {
  padding: 6px 0; border-bottom: 1px dotted var(--border); display: flex; gap: 8px; align-items: center; cursor: pointer;
}
.conn-item:hover { color: var(--red); }
.conn-rel { font-family: var(--mono); font-size: 10px; color: var(--cyan); padding: 1px 5px; background: rgba(0,224,192,.1); }

.sidebar-placeholder { text-align: center; padding: 60px 20px; color: var(--fg-mute); font-family: var(--mono); font-size: 13px; }
.sidebar-placeholder .hint { font-size: 11px; margin-top: 8px; color: var(--fg-mute); }

/* Mobile */
@media (max-width: 760px) {
  .hero h1 { font-size: 40px; letter-spacing: 4px; }
  .hero-tomb { font-size: 56px; }
  .stats { gap: 20px; }
  .stat .num { font-size: 28px; }
  .graph-wrap { grid-template-columns: 1fr; height: auto; }
  .graph-canvas-wrap { height: 55vh; border-right: none; border-bottom: 1px solid var(--border); }
  .article-row { grid-template-columns: 50px 1fr; gap: 12px; }
  .article-row .date, .article-row .author { display: none; }
  .article-header h1 { font-size: 26px; }
  .article-body { font-size: 16px; }
  .site-nav-inner { padding: 12px 16px; }
  .site-brand { font-size: 18px; }
  .site-nav-links { gap: 14px; font-size: 12px; }
  .container { padding: 24px 16px; }
}