/* 全局样式 */
body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  color: #333;
  line-height: 1.8;
}

a {
  text-decoration: none;
  color: #1890ff;
  transition: color 0.3s ease;
}

a:hover {
  color: #40a9ff;
  text-decoration: underline;
}

/* 导航栏增强 */
nav {
  background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

nav a {
  color: #fff;
  font-weight: 500;
}

nav a:hover {
  background: rgba(255,255,255,0.2);
  color: #fff;
}

/* 卡片悬停效果 */
div[style*="box-shadow"]:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 16px rgba(0,0,0,0.12) !important;
}

/* 响应式 */
@media (max-width: 768px) {
  main {
    padding: 0 15px !important;
  }
  h1 {
    font-size: 24px !important;
  }
  nav a {
    font-size: 12px !important;
    padding: 10px 3px !important;
  }
}

/* UI风格变体 */
.ui-style-0 { --primary: #1890ff; }
.ui-style-1 { --primary: #52c41a; }
.ui-style-2 { --primary: #faad14; }
.ui-style-3 { --primary: #f5222d; }
.ui-style-4 { --primary: #722ed1; }
.ui-style-5 { --primary: #eb2f96; }
.ui-style-6 { --primary: #13c2c2; }
.ui-style-7 { --primary: #fa8c16; }
.ui-style-8 { --primary: #2f54eb; }
.ui-style-9 { --primary: #a0d911; }
.ui-style-10 { --primary: #fa541c; }
.ui-style-11 { --primary: #722ed1; }
.ui-style-12 { --primary: #eb2f96; }
.ui-style-13 { --primary: #13c2c2; }
.ui-style-14 { --primary: #1890ff; }
.ui-style-15 { --primary: #52c41a; }