/* ============================================
   响应式样式 - responsive.css
   断点：768px（平板）、480px（手机）
   ============================================ */

/* 平板端 */
@media (max-width: 768px) {
  :root {
    --nav-height: 56px;
  }

  .hamburger {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--card-bg);
    flex-direction: column;
    padding: 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-hover);
    margin-left: 0;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 12px 16px;
    width: 100%;
    border-radius: var(--radius);
  }

  .nav-search {
    display: none;
  }

  .nav-actions .btn-outline {
    display: none;
  }

  /* 首页轮播图 */
  .carousel {
    height: 280px;
    border-radius: var(--radius);
  }

  .carousel-overlay h2 {
    font-size: 18px;
  }

  .carousel-overlay p {
    font-size: 13px;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  /* 卡片网格 */
  .card-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .card-grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .card-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .card-image {
    height: 140px;
  }

  .card-body {
    padding: 12px;
  }

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

  .card-meta {
    font-size: 12px;
    gap: 10px;
  }

  /* 列表卡片横向 */
  .list-card {
    flex-direction: column;
  }

  .list-card .card-image {
    width: 100%;
    min-width: 100%;
    height: 160px;
  }

  /* 详情页 */
  .article-detail {
    padding: 24px 16px;
  }

  .article-detail .article-title {
    font-size: 22px;
  }

  .article-detail .article-meta {
    flex-wrap: wrap;
    gap: 12px;
  }

  /* 筛选栏 */
  .filter-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .filter-sort {
    margin-left: 0;
  }

  /* 用户中心 */
  .user-layout {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 16px 0;
  }

  .user-sidebar {
    position: static;
  }

  .user-sidebar .menu-list {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
  }

  .user-sidebar .menu-list a {
    padding: 8px 12px;
    font-size: 13px;
  }

  .user-sidebar .user-info {
    display: flex;
    align-items: center;
    text-align: left;
    gap: 12px;
    padding-bottom: 12px;
  }

  .user-sidebar .user-avatar-lg {
    width: 48px;
    height: 48px;
    font-size: 20px;
    margin: 0;
  }

  .profile-info {
    grid-template-columns: 1fr;
  }

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

  .footer-brand {
    grid-column: 1 / -1;
  }

  /* 认证页 */
  .auth-card {
    padding: 24px;
    max-width: 100%;
  }

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

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

  /* 文章操作按钮 */
  .article-actions {
    gap: 8px;
  }

  .action-btn {
    padding: 8px 14px;
    font-size: 13px;
  }
}

/* 手机端 */
@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .carousel {
    height: 200px;
    margin-bottom: 24px;
  }

  .carousel-overlay h2 {
    font-size: 16px;
  }

  .carousel-overlay {
    padding: 20px 16px 16px;
  }

  .carousel-btn {
    width: 36px;
    height: 36px;
    font-size: 16px;
  }

  .section-title {
    font-size: 18px;
  }

  .card-grid-4,
  .card-grid-3,
  .card-grid {
    grid-template-columns: 1fr;
  }

  .card-image {
    height: 180px;
  }

  .page-header {
    padding: 20px 0;
  }

  .page-header h1 {
    font-size: 22px;
  }

  /* 筛选标签 */
  .filter-tags {
    gap: 6px;
  }

  .filter-tag {
    padding: 5px 12px;
    font-size: 13px;
  }

  /* 详情页 */
  .article-detail .article-title {
    font-size: 20px;
  }

  .article-detail .article-content {
    font-size: 15px;
  }

  .article-detail .article-content h2 {
    font-size: 18px;
  }

  .article-detail .article-content pre {
    padding: 12px;
    font-size: 13px;
  }

  /* 用户中心 */
  .user-content {
    padding: 16px;
  }

  .user-content h2 {
    font-size: 18px;
  }

  /* 页脚 */
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .footer {
    padding: 32px 16px 20px;
  }

  /* 认证页 */
  .auth-card {
    padding: 20px;
  }

  .auth-card h2 {
    font-size: 20px;
  }

  /* 404 */
  .error-page .error-code {
    font-size: 80px;
  }

  .error-page {
    padding: 40px 16px;
  }

  /* 弹窗 */
  .modal {
    min-width: auto;
    width: 90%;
    padding: 24px;
  }

  /* 列表卡片 */
  .list-card .card-body {
    padding: 12px;
  }

  .list-card .card-title {
    font-size: 15px;
  }

  .related-item img {
    width: 64px;
    height: 48px;
  }
}