:root {
  --primary: #1a56db;
  --primary-dark: #1e40af;
  --primary-light: #3b82f6;
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #1e293b;
  --text-light: #64748b;
  --border: #e2e8f0;
  --radius: 12px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}
/* 导航栏 */
.navbar {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1000;
}
.nav-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav-logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary-dark);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-logo span { color: var(--primary); }
.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}
.nav-links a {
  text-decoration: none;
  color: var(--text-light);
  font-size: 15px;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--primary); }

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  color: white;
  padding: 80px 24px 60px;
  text-align: center;
}
.hero h1 { font-size: 40px; font-weight: 700; margin-bottom: 12px; }
.hero .subtitle { font-size: 18px; opacity: 0.9; margin-bottom: 24px; }
.hero-badges {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}
.badge {
  background: rgba(255,255,255,0.15);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 14px;
  border: 1px solid rgba(255,255,255,0.2);
}

/* 容器 */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 24px;
}
.section-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 10px;
}
.section-title::before {
  content: '';
  width: 4px;
  height: 24px;
  background: var(--primary);
  border-radius: 2px;
}

/* 卡片 */
.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
  border: 1px solid var(--border);
}
.card h3 {
  font-size: 18px;
  color: var(--primary-dark);
  margin-bottom: 12px;
}
.card p { color: var(--text-light); font-size: 15px; }

/* 个人信息网格 */
.profile-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.profile-item {
  display: flex;
  flex-direction: column;
}
.profile-label {
  font-size: 12px;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}
.profile-value { font-size: 15px; font-weight: 500; }

/* 文章列表 */
.article-list { display: flex; flex-direction: column; gap: 16px; }
.article-item {
  background: var(--card);
  border-radius: var(--radius);
  padding: 20px 24px;
  border: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 0.2s;
  text-decoration: none;
  color: inherit;
}
.article-item:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  border-color: var(--primary-light);
  transform: translateY(-1px);
}
/* 首页内容专区卡片 hover */
.card[href] { transition: all 0.2s; }
.card[href]:hover {
  box-shadow: 0 8px 24px rgba(26,86,219,0.12);
  border-color: var(--primary-light);
  transform: translateY(-2px);
}
.article-info h4 { font-size: 16px; margin-bottom: 4px; color: var(--text); }
.article-info .article-meta { font-size: 13px; color: var(--text-light); }
.article-arrow { color: var(--primary); font-size: 20px; }

/* 文献荟萃分类 */
.review-group { margin-bottom: 28px; }
.review-group-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--primary-dark);
  margin-bottom: 12px;
  padding-left: 12px;
  border-left: 3px solid var(--primary);
}

/* 联系方式 */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}
.contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: #eff6ff;
  border-radius: 10px;
}
.contact-icon { font-size: 20px; }
.contact-text { font-size: 14px; }
.contact-text strong { display: block; font-size: 13px; color: var(--text-light); margin-bottom: 2px; }

/* 底部 */
.footer {
  text-align: center;
  padding: 40px 24px;
  color: var(--text-light);
  font-size: 13px;
  border-top: 1px solid var(--border);
  margin-top: 20px;
}

/* 响应式 */
@media (max-width: 640px) {
  .nav-links { gap: 16px; }
  .nav-links a { font-size: 14px; }
  .hero h1 { font-size: 28px; }
  .profile-grid { grid-template-columns: 1fr; }
  .article-item { flex-direction: column; align-items: flex-start; gap: 8px; }
}