/* 案例过滤导航 */
.case-filter {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: var(--spacing-xl);
    margin-top: var(--spacing-xl);
    padding: 0 15px;
  }
  
  .filter-btn {
    padding: 8px 20px;
    background: white;
    border: 1px solid var(--color-border);
    border-radius: 30px;
    cursor: pointer;
    transition: all var(--transition-normal);
    font-weight: 500;
  }
  
  .filter-btn:hover, .filter-btn.active {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
  }
  
  /* 案例网格布局 */
  .case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
  }
  
  .case-card {
    background: white;
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--box-shadow-sm);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  }
  
  .case-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow-md);
  }
  
  .case-image {
    height: 250px;
    overflow: hidden;
    position: relative;
  }
  
  .case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
  }
  
  .case-card:hover .case-image img {
    transform: scale(1.05);
  }
  
  .case-type {
    position: absolute;
    top: 15px;
    right: 15px;
    background: var(--color-primary);
    color: white;
    padding: 5px 15px;
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 500;
  }
  
  .case-content {
    display: block;
    padding: var(--spacing-lg);
  }
  
  .case-content h3 {
    color: var(--color-secondary);
    margin-bottom: 10px;
    font-size: 1.4rem;
  }
  
  .case-meta {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
    color: var(--color-text-light);
    font-size: 0.9rem;
  }
  
  .case-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
  }
  
  .case-content p {
    margin-bottom: 20px;
    color: var(--color-text);
  }
  
  .btn {
    display: inline-block;
    padding: 10px 25px;
    background: var(--color-primary);
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius-md);
    font-weight: 500;
    transition: background var(--transition-normal);
    border: none;
    cursor: pointer;
  }
  
  .btn:hover {
    background: var(--color-primary-dark);
  }
  
  .btn-outline {
    background: transparent;
    border: 1px solid var(--color-primary);
    color: var(--color-primary);
  }
  
  .btn-outline:hover {
    background: var(--color-primary);
    color: white;
  }
  
  /* 统计部分 */
  .stats-section {
    background: white;
    padding: var(--spacing-xl) 0;
    margin: var(--spacing-xl) 0;
    text-align: center;
  }
  
  .stats-container {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: var(--spacing-xl);
  }
  
  .stat-item {
    flex: 1;
    min-width: 200px;
  }
  
  .stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 10px;
  }
  
  .stat-label {
    font-size: 1.1rem;
    color: var(--color-text);
  }
  
  /* 响应式设计 */
  @media (max-width: 768px) {
    .case-grid {
      grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
    
    .page-header h1 {
      font-size: 2rem;
    }
  }
  
  @media (max-width: 480px) {
    .case-grid {
      grid-template-columns: 1fr;
    }
    
    .filter-btn {
      padding: 6px 15px;
      font-size: 0.9rem;
    }
  }

  .btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-large);
  }