:root {
  --bg: #0a0a0f;
  --bg-elevated: #111118;
  --bg-card: #16161f;
  --border: #272736;
  --border-strong: #3f3f55;
  --text: #e8e8ef;
  --text-muted: #9090a0;
  --text-dim: #5d5d72;
  --primary: #8b5cf6;
  --primary-glow: rgba(139, 92, 246, 0.35);
  --accent-cyan: #06b6d4;
  --accent-red: #ef4444;
  --accent-amber: #f59e0b;
  --accent-green: #22c55e;
  --font-mono: "SF Mono", "Fira Code", "JetBrains Mono", "Cascadia Code", Consolas, monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
}

a { color: var(--primary); text-decoration: none; transition: color 0.15s; }
a:hover { color: #a78bfa; }

.mono { font-family: var(--font-mono); }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 导航 */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
}

.brand-mark {
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, var(--primary), var(--accent-cyan));
  display: grid;
  place-items: center;
  font-size: 14px;
  color: #fff;
  border-radius: 4px;
}

.nav-links {
  display: flex;
  gap: 24px;
  font-family: var(--font-mono);
  font-size: 13px;
}

.nav-links a {
  color: var(--text-muted);
}

.nav-links a:hover, .nav-links a.active {
  color: var(--text);
}

/* 页脚 */
.footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  margin-top: 80px;
  color: var(--text-dim);
  font-size: 13px;
  font-family: var(--font-mono);
}

.footer a { color: var(--text-muted); }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  border: 1px solid var(--border-strong);
  background: var(--bg-card);
  color: var(--text);
  cursor: pointer;
  transition: all 0.15s;
}

.btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--bg-elevated);
}

.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  background: #7c3aed;
  color: #fff;
}

/* 首页 */
.hero {
  min-height: calc(100vh - 56px - 120px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 24px;
}

.hero-logo {
  width: 120px;
  height: 120px;
  background: linear-gradient(135deg, var(--primary), var(--accent-cyan));
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 64px;
  font-weight: 900;
  color: #fff;
  box-shadow: 0 0 80px var(--primary-glow);
  margin-bottom: 32px;
}

.hero h1 {
  font-family: var(--font-mono);
  font-size: clamp(32px, 6vw, 56px);
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}

.hero-tagline {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 520px;
  margin: 0 0 40px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 48px;
  width: min(100%, 480px);
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 20px 12px;
  text-align: center;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
}

.stat-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 8px;
  font-family: var(--font-mono);
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.section-title {
  font-family: var(--font-mono);
  font-size: 24px;
  margin: 0 0 8px;
  color: var(--text);
}

.section-desc {
  color: var(--text-muted);
  font-size: 14px;
  margin: 0 0 24px;
}

/* 页面头部 */
.page-header {
  padding: 48px 0 32px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 32px;
}

/* 文章列表 */
.search-bar {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 14px;
  margin-bottom: 24px;
}

.search-bar:focus {
  outline: none;
  border-color: var(--primary);
}

.articles-grid {
  display: grid;
  gap: 16px;
}

.article-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 20px;
  transition: transform 0.15s, border-color 0.15s;
}

.article-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

.article-card h3 {
  font-family: var(--font-mono);
  font-size: 17px;
  margin: 0 0 10px;
  color: var(--text);
  line-height: 1.45;
}

.article-card:hover h3 {
  color: var(--primary);
}

.article-meta {
  display: flex;
  gap: 12px;
  font-size: 12px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.article-excerpt {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 10px;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 文章详情 */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
  padding-bottom: 60px;
}

@media (max-width: 900px) {
  .article-layout { grid-template-columns: 1fr; }
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.back-link:hover { color: var(--text); }

.article-header h1 {
  font-family: var(--font-mono);
  font-size: clamp(22px, 4vw, 32px);
  line-height: 1.35;
  margin: 0 0 16px;
}

.article-header .meta {
  display: flex;
  gap: 12px;
  font-size: 13px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  flex-wrap: wrap;
}

.article-body {
  font-size: 16px;
  color: var(--text);
}

.article-body h2 {
  font-family: var(--font-mono);
  font-size: 22px;
  margin: 40px 0 16px;
  color: var(--text);
}

.article-body h3 {
  font-family: var(--font-mono);
  font-size: 18px;
  margin: 32px 0 12px;
}

.article-body p {
  margin: 0 0 18px;
}

.article-body ul, .article-body ol {
  margin: 0 0 18px;
  padding-left: 24px;
}

.article-body li {
  margin-bottom: 6px;
}

.article-body blockquote {
  margin: 24px 0;
  padding: 12px 20px;
  border-left: 3px solid var(--primary);
  background: var(--bg-elevated);
  color: var(--text-muted);
}

.article-body code {
  font-family: var(--font-mono);
  background: var(--bg-elevated);
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 0.9em;
}

.article-body pre {
  background: var(--bg-elevated);
  padding: 16px;
  overflow-x: auto;
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 13px;
}

.article-body pre code {
  background: transparent;
  padding: 0;
}

.article-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 32px 0;
}

.article-body img {
  max-width: 100%;
  height: auto;
}

/* 侧边栏 */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 20px;
}

.sidebar-title {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--primary);
  margin: 0 0 14px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.entity-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.entity-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--text);
}

.entity-tag::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.entity-tag.product::before { background: var(--accent-cyan); }
.entity-tag.person::before { background: var(--accent-amber); }
.entity-tag.company::before { background: var(--accent-red); }
.entity-tag.vc_firm::before { background: var(--accent-green); }

.rel-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.rel-item {
  font-size: 12px;
  line-height: 1.6;
}

.rel-actors {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
}

.rel-type {
  padding: 2px 6px;
  border: 1px solid var(--border-strong);
  color: var(--text-muted);
  font-size: 10px;
}

.rel-label {
  color: var(--text-muted);
  margin-top: 4px;
  padding-left: 10px;
  border-left: 2px solid var(--border);
}

/* 知识图谱页 */
.graph-page {
  display: grid;
  grid-template-columns: 1fr 320px;
  height: calc(100vh - 56px);
  overflow: hidden;
}

@media (max-width: 900px) {
  .graph-page { grid-template-columns: 1fr; height: auto; }
}

.graph-canvas-wrap {
  position: relative;
  background: var(--bg);
  overflow: hidden;
}

#graph-canvas {
  width: 100%;
  height: 100%;
  cursor: grab;
}

#graph-canvas:active { cursor: grabbing; }

.graph-controls {
  position: absolute;
  top: 16px;
  left: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 10;
}

.graph-search {
  width: 240px;
  padding: 10px 12px;
  background: rgba(16, 16, 24, 0.95);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 13px;
}

.graph-search:focus { outline: none; border-color: var(--primary); }

.graph-hint {
  font-size: 11px;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

.graph-sidebar {
  background: var(--bg-elevated);
  border-left: 1px solid var(--border);
  overflow-y: auto;
  padding: 20px;
}

.graph-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 24px;
}

.graph-stat {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 12px 8px;
  text-align: center;
}

.graph-stat .value {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
}

.graph-stat .label {
  font-size: 10px;
  color: var(--text-muted);
  margin-top: 4px;
  font-family: var(--font-mono);
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.leaderboard-section {
  margin-bottom: 28px;
}

.leaderboard-title {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text);
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.leaderboard-count {
  font-size: 10px;
  color: var(--text-dim);
}

.leaderboard-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.leaderboard-item {
  display: grid;
  grid-template-columns: 22px 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  font-size: 12px;
  font-family: var(--font-mono);
  cursor: pointer;
  transition: border-color 0.15s;
}

.leaderboard-item:hover {
  border-color: var(--primary);
}

.leaderboard-rank {
  color: var(--text-dim);
  text-align: center;
}

.leaderboard-name {
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.leaderboard-score {
  color: var(--text-muted);
  font-size: 10px;
}

.node-info {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 16px;
  margin-bottom: 20px;
}

.node-info h4 {
  font-family: var(--font-mono);
  font-size: 16px;
  margin: 0 0 8px;
}

.node-info p {
  font-size: 13px;
  color: var(--text-muted);
  margin: 0 0 12px;
}

.node-info .meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
}

.ai-context {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(1px, 1px, 1px, 1px);
  white-space: nowrap;
}