/* 类别选择器 */
 .tech-dept {
    background-color: #e0f7e9;
    padding: 10px;
    margin-bottom: 20px;
  }
  
 .marketing-dept {
    background-color: #e3f2fd;
    padding: 10px;
    margin-bottom: 20px;
  }
  
  .hr-dept {
    background-color: #ffe0b2;
    padding: 10px;
    margin-bottom: 20px;
  }
  
  /* 限制和不限制的 ID 选择器 */
  #special-employee {
    border: 2px solid #8e24aa;
    background-color: #f5f5f5;
    padding: 10px;
  }
  
  /* 后代选择器 */
  .dept employee-card {
    color: #424242;
    padding: 10px;
    border-bottom: 1px solid #e0e0e0;
  }
  
  /* 并集选择器 */
  .tech-dept, .marketing-dept {
    font-family: Arial, sans-serif;
    line-height: 1.5;
  }
  
  /* 伪类选择器 */
  .employee-card:hover {
    background-color: #fff9c4;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  }
  
  .employee-card:nth-child(odd) {
    background-color: #f5f5f5;
  }
  
  /* 伪类和类别选择器组合 */
  .high-rating:hover {
    color: #ffd700;
    font-weight: bold;
    text-decoration: underline;
  }