/* 响应式样式 */

/* 平板端 (768px - 1199px) */
@media (max-width: 1199px) {
  .container {
    padding: 0 16px;
  }

  .section-title {
    font-size: 28px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 30px;
  }

  /* 导航菜单：平板/窄窗口下空间不足时允许横向滚动，避免栏目名被压缩成竖排 */
  .nav {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    flex-wrap: nowrap;
  }

  .nav::-webkit-scrollbar {
    display: none;
  }

  .nav-link {
    white-space: nowrap;
  }
}

/* 移动端 (< 768px) */
@media (max-width: 767px) {
  :root {
    --header-height: 60px;
  }

  .container {
    padding: 0 12px;
  }

  /* 移动端菜单 */
  .menu-toggle {
    display: flex;
  }

  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg);
    flex-direction: column;
    padding: 16px;
    gap: 0;
    box-shadow: var(--shadow);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
  }

  .nav.show {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-item {
    width: 100%;
    border-bottom: 1px solid var(--border);
  }

  .nav-link {
    padding: 12px 0;
    font-size: 16px;
  }

  .dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    padding: 0 0 8px 16px;
    display: none;
  }

  .nav-item:hover .dropdown,
  .nav-item.active .dropdown {
    display: block;
  }

  .search-box {
    width: 140px;
  }

  /* 页脚 */
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer {
    padding: 40px 0 16px;
  }

  /* 面包屑 */
  .breadcrumb {
    padding: 12px 0;
    font-size: 13px;
  }

  /* 分页 */
  .pagination {
    gap: 4px;
  }

  .pagination a,
  .pagination span {
    min-width: 32px;
    height: 32px;
    padding: 0 8px;
    font-size: 13px;
  }

  /* 区块标题 */
  .section-header {
    margin-bottom: 24px;
  }

  .section-title {
    font-size: 24px;
  }

  .section-subtitle {
    font-size: 13px;
  }

  /* Tab */
  .tab-nav {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .tab-nav::-webkit-scrollbar {
    display: none;
  }

  .tab-item {
    padding: 10px 16px;
    font-size: 14px;
    white-space: nowrap;
  }

  /* 卡片 */
  .card-img {
    height: 160px;
  }

  .card-body {
    padding: 16px;
  }

  /* 新闻项 */
  .news-item {
    gap: 12px;
    padding: 12px 0;
  }

  .news-date {
    min-width: 48px;
    height: 48px;
  }

  .news-date .day {
    font-size: 16px;
  }

  .news-title {
    font-size: 14px;
  }

  .news-summary {
    display: none;
  }

  /* 返回顶部 */
  .back-to-top {
    width: 40px;
    height: 40px;
    bottom: 20px;
    right: 20px;
    font-size: 16px;
  }
}

/* 小屏手机 (< 480px) */
@media (max-width: 479px) {
  .logo-text {
    font-size: 16px;
  }

  .logo-text span {
    font-size: 12px;
  }

  .logo-icon {
    width: 36px;
    height: 36px;
    font-size: 16px;
  }

  .search-box {
    display: none;
  }

  .section-title {
    font-size: 20px;
  }
}