/* 全局样式增强 */
body {
  font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
}

h1, h2, h3 { font-weight: 600; }

/* 卡片悬停效果 */
div:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15) !important;
}

/* 链接效果 */
a { transition: all 0.3s ease; }
a:hover { opacity: 0.8; }

/* 响应式优化 */
@media (max-width: 768px) {
  header h1 { font-size: 1.8rem !important; }
  header p { font-size: 1rem !important; }
  main { padding: 0 0.5rem !important; }
  section { padding: 1.5rem !important; }
}