/* 主体布局 */
    .page-main { flex: 1; max-width: 1200px; margin: 0 auto; padding: 32px; width: 100%; }
    .page-wrapper { display: flex; gap: 28px; }

    /* 侧边栏 */
    .sidebar { width: 240px; flex-shrink: 0; }
    .sidebar-section { margin-bottom: 24px; }
    .sidebar-title {
      font-size: 0.85rem; font-weight: 700; color: var(--navy); text-transform: uppercase;
      letter-spacing: 1px; margin-bottom: 12px; padding-bottom: 8px; border-bottom: 2px solid var(--gray-200);
    }
    .sidebar-menu { list-style: none; }
    .sidebar-menu li { margin-bottom: 2px; }
    .sidebar-menu a {
      display: flex; align-items: center; gap: 8px; padding: 8px 12px; border-radius: var(--radius);
      font-size: 0.85rem; color: var(--gray-600); transition: var(--transition);
    }
    .sidebar-menu a:hover, .sidebar-menu a.active { background: var(--gray-100); color: var(--gold); }
    .sidebar-contact {
      background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius);
      padding: 16px; font-size: 0.82rem; color: var(--gray-600);
    }
    .sidebar-contact p { margin-bottom: 6px; line-height: 1.5; }
    .sidebar-contact strong { display: block; margin-bottom: 8px; color: var(--navy); font-size: 0.85rem; }

    /* 主内容 */
    .main-content { flex: 1; min-width: 0; }
    .breadcrumb { font-size: 0.8rem; color: var(--gray-400); margin-bottom: 16px; }
    .breadcrumb a { color: var(--blue); }
    .breadcrumb a:hover { color: var(--gold); }
    .page-header { margin-bottom: 24px; padding-bottom: 16px; border-bottom: 1px solid var(--gray-200); }
    .page-title { font-size: 1.8rem; font-weight: 700; color: var(--navy); margin-bottom: 6px; }
    .page-subtitle { font-size: 0.9rem; color: var(--gray-600); }

    /* 产品网格 */
    .product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 18px; }
    .product-card {
      background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius);
      overflow: hidden; transition: var(--transition); display: flex; flex-direction: column;
    }
    .product-card:hover { box-shadow: var(--shadow-lg); border-color: #ccc; transform: translateY(-2px); }
    .product-card-img {
      aspect-ratio: 1/1; background: var(--gray-50); display: flex; align-items: center;
      justify-content: center; padding: 24px; border-bottom: 1px solid var(--gray-200);
    }
    .product-card-img img { max-width: 75%; max-height: 75%; }
    .product-card-body { padding: 16px; flex: 1; display: flex; flex-direction: column; }
    .product-card-body h3 { font-size: 0.95rem; font-weight: 600; color: var(--navy); margin-bottom: 4px; }
    .product-card-body h3 a:hover { color: var(--gold); }
    .product-card-model { font-size: 0.78rem; color: var(--blue); font-weight: 500; margin-bottom: 6px; }
    .product-card-desc { font-size: 0.8rem; color: var(--gray-600); margin-bottom: 12px; flex: 1; line-height: 1.5; }
    .btn-sm { padding: 7px 16px; font-size: 0.78rem; background: var(--blue); color: #fff; border: none; border-radius: var(--radius); font-weight: 500; cursor: pointer; display: inline-block; text-align: center; }
    .btn-sm:hover { background: var(--blue-hover); }

    /* 分页 */
    .pagination { display: flex; justify-content: center; gap: 6px; margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--gray-200); }
    .pagination a, .pagination span { display: inline-flex; align-items: center; justify-content: center; min-width: 34px; height: 34px; padding: 0 8px; border-radius: var(--radius); font-size: 0.82rem; font-weight: 500; transition: var(--transition); }
    .pagination a { color: var(--gray-600); border: 1px solid var(--gray-200); }
    .pagination a:hover { border-color: var(--gold); color: var(--gold); }
    .pagination .current { background: var(--blue); color: #fff; border-color: var(--blue); }
    
    /* 响应式 */
    @media (max-width: 1024px) {
  .container, .page-main { padding: 0 20px; }
  .page-main { padding: 24px 20px; }
  .mobile-btn { display: block; }
  .main-nav {
    position: fixed; top: 0; right: -280px; width: 260px; height: 100vh;
    background: #fff; flex-direction: column; gap: 0; padding: 72px 20px 24px;
    box-shadow: -4px 0 20px rgba(0,0,0,0.1); transition: right 0.3s; z-index: 101; overflow-y: auto;
  }
  .main-nav.active { right: 0; }
  .lang-switch { display: none; }
  .nav-item { width: 100%; border-bottom: 1px solid var(--gray-200); }
  .nav-link { padding: 14px 0; display: flex; justify-content: space-between; width: 100%; }
  .submenu { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: none; display: none; padding-left: 12px; }
  .nav-item.submenu-open .submenu { display: block; }
  
  .page-wrapper { flex-direction: column; }
  .sidebar { width: 100%; order: 2; }
  .main-content { order: 1; min-width: 100%; }
  
  .product-grid { grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

    @media (max-width: 640px) {
      .page-title { font-size: 1.5rem; }
      .product-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
      .product-card-body { padding: 12px; }
      .product-card-body h3 { font-size: 0.88rem; }
      .footer-grid { grid-template-columns: 1fr; gap: 20px; }
    }