/* ============================================
   大神认知知识库 · 全局样式系统
   Design: Dark cosmos theme
   ============================================ */

:root {
  /* 色彩系统 */
  --bg-deep:       #080c14;
  --bg-card:       #0d1220;
  --bg-hover:      #131929;
  --border:        rgba(255,255,255,0.07);
  --border-bright: rgba(255,255,255,0.15);

  /* 人物主色 */
  --munger:   #f0a500;
  --naval:    #00c9a7;
  --buffett:  #e05c5c;
  --musk:     #00b4ff;
  --jobs:     #c8a0ff;
  --taleb:    #ff6450;

  /* 文字 */
  --text-primary:   #f0f4ff;
  --text-secondary: #a8b0be;
  --text-muted:     #636b7a;

  /* 间距 */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;

  /* 字体 */
  --font-sans: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

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

/* ---- 星空背景 ---- */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(240,165,0,0.04) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(0,201,167,0.04) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(224,92,92,0.03) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

/* ---- 导航 ---- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  height: 60px;
  background: rgba(8,12,20,0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-logo .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--munger), var(--naval));
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.85); }
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s;
}

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

/* ---- 导航下拉菜单 ---- */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-trigger {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  cursor: pointer;
  transition: color 0.2s;
  user-select: none;
}

.nav-dropdown-trigger:hover { color: var(--text-primary); }
.nav-dropdown-trigger.active { color: var(--text-primary); }

.nav-dropdown-arrow {
  width: 10px;
  height: 10px;
  opacity: 0.5;
  transition: transform 0.2s;
}

.nav-dropdown:hover .nav-dropdown-arrow,
.nav-dropdown.open .nav-dropdown-arrow {
  transform: rotate(180deg);
  opacity: 0.8;
}

.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%);
  min-width: 160px;
  background: rgba(13,18,32,0.97);
  border: 1px solid var(--border-bright);
  border-radius: 12px;
  padding: 6px;
  backdrop-filter: blur(20px);
  box-shadow: 0 16px 48px rgba(0,0,0,0.6);
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(-6px);
  transition: opacity 0.18s, transform 0.18s, visibility 0.18s;
  z-index: 200;
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown.open .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.nav-dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: 8px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13px;
  transition: background 0.12s, color 0.12s;
  white-space: nowrap;
}

.nav-dropdown-item:hover {
  background: rgba(255,255,255,0.06);
  color: var(--text-primary);
}

.nav-dropdown-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}

.nav-search-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 20px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13px;
  transition: all 0.15s;
  cursor: pointer;
}

.nav-search-btn:hover {
  border-color: var(--border-bright);
  color: var(--text-secondary);
  background: rgba(255,255,255,0.08);
}

/* ---- 主内容区 ---- */
.main {
  position: relative;
  z-index: 1;
  padding-top: 60px;
}

/* ---- 卡片 ---- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}

.card:hover {
  border-color: var(--border-bright);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}

/* ---- 标签 ---- */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
  border: 1px solid currentColor;
  opacity: 0.8;
}

/* ---- 引用块 ---- */
.quote-block {
  position: relative;
  padding: 20px 24px 20px 32px;
  border-left: 3px solid;
  background: rgba(255,255,255,0.02);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--text-secondary);
  line-height: 1.8;
}

.quote-block::before {
  content: '"';
  position: absolute;
  top: -8px; left: 12px;
  font-size: 48px;
  opacity: 0.2;
  font-style: normal;
  line-height: 1;
}

/* ---- 概念标签云 ---- */
.concept-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
}

.concept-tag:hover {
  background: rgba(255,255,255,0.08);
  border-color: var(--border-bright);
  color: var(--text-primary);
}

.concept-tag .count {
  font-size: 11px;
  opacity: 0.5;
}

/* ---- 搜索框 ---- */
.search-wrap {
  position: relative;
  max-width: 480px;
}

.search-input {
  width: 100%;
  padding: 12px 20px 12px 44px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 40px;
  color: var(--text-primary);
  font-size: 14px;
  font-family: var(--font-sans);
  outline: none;
  transition: border-color 0.2s;
}

.search-input:focus { border-color: var(--border-bright); }
.search-input::placeholder { color: var(--text-muted); }

.search-icon {
  position: absolute;
  left: 16px; top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 16px;
}

/* ---- 分隔线 ---- */
.divider {
  height: 1px;
  background: var(--border);
  margin: 32px 0;
}

/* ---- 滚动条 ---- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.2); }

/* ---- 响应式 ---- */
@media (max-width: 768px) {
  .nav { padding: 0 20px; }
  .nav-links { display: none; }
}

/* ---- 动画工具类 ---- */
.fade-in {
  animation: fadeIn 0.6s ease forwards;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.stagger > * {
  opacity: 0;
  animation: fadeIn 0.5s ease forwards;
}
.stagger > *:nth-child(1) { animation-delay: 0.05s; }
.stagger > *:nth-child(2) { animation-delay: 0.10s; }
.stagger > *:nth-child(3) { animation-delay: 0.15s; }
.stagger > *:nth-child(4) { animation-delay: 0.20s; }
.stagger > *:nth-child(5) { animation-delay: 0.25s; }
.stagger > *:nth-child(6) { animation-delay: 0.30s; }

/* ---- 人物色彩工具类 ---- */
.color-munger  { color: var(--munger); }
.color-naval   { color: var(--naval); }
.color-buffett { color: var(--buffett); }
.color-musk    { color: var(--musk); }
.color-jobs    { color: var(--jobs); }
.color-taleb   { color: var(--taleb); }

.bg-munger  { background: rgba(240,165,0,0.08); border-color: rgba(240,165,0,0.2); }
.bg-naval   { background: rgba(0,201,167,0.08); border-color: rgba(0,201,167,0.2); }
.bg-musk    { background: rgba(0,180,255,0.08); border-color: rgba(0,180,255,0.2); }
.bg-jobs    { background: rgba(200,160,255,0.08); border-color: rgba(200,160,255,0.2); }
.bg-taleb   { background: rgba(255,100,80,0.08); border-color: rgba(255,100,80,0.2); }
.bg-buffett { background: rgba(224,92,92,0.08); border-color: rgba(224,92,92,0.2); }

/* ---- 人物页专用 ---- */
.person-hero {
  min-height: 380px;
  display: flex;
  align-items: flex-end;
  padding: 60px 60px 48px;
  position: relative;
  overflow: hidden;
}

.person-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, var(--bg-deep) 0%, transparent 60%);
}

.person-hero-content {
  position: relative;
  z-index: 1;
}

.person-avatar {
  width: 80px; height: 80px;
  border-radius: 50%;
  border: 3px solid;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  margin-bottom: 20px;
  background: var(--bg-card);
}

.person-name {
  font-size: 42px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 8px;
}

.person-tagline {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 480px;
}

/* ---- 内容区布局 ---- */
.content-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 32px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 40px 80px;
}

@media (max-width: 960px) {
  .content-grid { grid-template-columns: 1fr; }
  .person-hero { padding: 40px 24px 36px; }
  .person-name { font-size: 32px; }
}

/* ---- 模型卡片 ---- */
.model-card {
  padding: 24px;
  margin-bottom: 16px;
  cursor: pointer;
}

.model-card .model-num {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0.5;
  margin-bottom: 8px;
}

.model-card .model-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.model-card .model-oneliner {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.model-card .model-body {
  display: none;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.model-card.open .model-body { display: block; }

.model-card .model-toggle {
  float: right;
  font-size: 18px;
  opacity: 0.4;
  transition: transform 0.2s;
}

.model-card.open .model-toggle { transform: rotate(45deg); opacity: 0.8; }

/* ---- 金句卡片 ---- */
.quote-card {
  padding: 20px 24px;
  margin-bottom: 12px;
  border-left: 3px solid;
}

.quote-card .quote-text {
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 10px;
}

.quote-card .quote-meta {
  font-size: 12px;
  color: var(--text-muted);
}

/* ---- 侧边栏 ---- */
.sidebar-section {
  margin-bottom: 32px;
}

.sidebar-title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 16px;
}

/* ---- 碰撞页 ---- */
.collision-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}

.collision-col {
  padding: 32px 28px;
  border-right: 1px solid var(--border);
}

.collision-col:last-child { border-right: none; }

.collision-col-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.collision-col-name {
  font-size: 16px;
  font-weight: 600;
}

.collision-answer {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

@media (max-width: 768px) {
  .collision-grid { grid-template-columns: 1fr; }
  .collision-col { border-right: none; border-bottom: 1px solid var(--border); }
}

/* ---- 知识图谱 ---- */
#graph-container {
  width: 100%;
  height: calc(100vh - 60px);
  position: relative;
}

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

.graph-tooltip {
  position: absolute;
  background: var(--bg-card);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 13px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
  max-width: 220px;
  z-index: 10;
}

.graph-tooltip.visible { opacity: 1; }

/* ---- 首页英雄区 ---- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 40px 60px;
  position: relative;
}

.hero-eyebrow {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(36px, 6vw, 72px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #f0f4ff 0%, #8892a4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto 48px;
  line-height: 1.7;
}

/* ---- 人物星图 ---- */
.people-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 900px;
  width: 100%;
  margin: 0 auto 60px;
}

@media (max-width: 640px) {
  .people-grid { grid-template-columns: 1fr; }
}

.person-card {
  padding: 28px 24px;
  border-radius: var(--radius-lg);
  text-decoration: none;
  display: block;
  position: relative;
  overflow: hidden;
  transition: transform 0.25s, box-shadow 0.25s;
}

.person-card::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.25s;
}

.person-card:hover { transform: translateY(-4px); }
.person-card:hover::before { opacity: 1; }

.person-card.munger  { background: var(--bg-card); border: 1px solid rgba(240,165,0,0.2); }
.person-card.naval   { background: var(--bg-card); border: 1px solid rgba(0,201,167,0.2); }
.person-card.buffett { background: var(--bg-card); border: 1px solid rgba(224,92,92,0.2); }

.person-card.munger:hover  { box-shadow: 0 16px 48px rgba(240,165,0,0.12); }
.person-card.naval:hover   { box-shadow: 0 16px 48px rgba(0,201,167,0.12); }
.person-card.buffett:hover { box-shadow: 0 16px 48px rgba(224,92,92,0.12); }

.person-card .pc-emoji {
  font-size: 36px;
  margin-bottom: 16px;
  display: block;
}

.person-card .pc-name {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 4px;
}

.person-card .pc-en {
  font-size: 12px;
  opacity: 0.4;
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}

.person-card .pc-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.person-card .pc-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.person-card .pc-tag {
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 10px;
  border: 1px solid;
  opacity: 0.7;
}

.person-card .pc-arrow {
  position: absolute;
  top: 24px; right: 24px;
  font-size: 18px;
  opacity: 0.3;
  transition: opacity 0.2s, transform 0.2s;
}

.person-card:hover .pc-arrow {
  opacity: 0.8;
  transform: translate(3px, -3px);
}

/* ---- 统计数字 ---- */
.stats-row {
  display: flex;
  gap: 48px;
  justify-content: center;
  margin-bottom: 60px;
}

.stat-item {
  text-align: center;
}

.stat-num {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--munger), var(--naval));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ---- 底部导航 ---- */
.bottom-nav {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 40px;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, rgba(240,165,0,0.15), rgba(0,201,167,0.15));
  border: 1px solid rgba(255,255,255,0.12);
  color: var(--text-primary);
}

.btn-primary:hover {
  background: linear-gradient(135deg, rgba(240,165,0,0.25), rgba(0,201,167,0.25));
  border-color: rgba(255,255,255,0.2);
}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
}

.btn-ghost:hover {
  border-color: var(--border-bright);
  color: var(--text-primary);
}

/* ---- 页脚 ---- */
footer {
  text-align: center;
  padding: 40px;
  color: var(--text-muted);
  font-size: 13px;
  border-top: 1px solid var(--border);
}