/* General style reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    font-family: "Microsoft YaHei", sans-serif;
    background-color: #fff;
    color: #333;
  }
  
  /* Header navigation styles */
  .header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    height: 60px;
    border-bottom: 1px solid #eee;
    
    .logo {
      display: flex;
      align-items: center;
      
      img {
        height: 30px;
        margin-right: 8px;
      }
      
      span {
        font-size: 18px;
        font-weight: bold;
        color: #007bff;
      }
    }
    
    .nav {
      display: flex;
      gap: 20px;
      
      a {
        text-decoration: none;
        color: #333;
        transition: color 0.3s ease;
        
        &:hover {
          color: #007bff;
        }
        
        &.active {
          color: #007bff;
          font-weight: bold;
        }
      }
    }
  }
  
  /* Banner area */
  .banner {
    background-color: #444;
    color: #fff;
    text-align: center;
    padding: 50px 0;
    
    h1 {
      font-size: 28px;
      margin-bottom: 10px;
    }
    
    p {
      font-size: 14px;
      opacity: 0.9;
    }
  }
  
  /* Main content container */
  .container {
    width: 90%;
    max-width: 1200px;
    margin: 40px auto;
  }
  
  .section-title {
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #007bff;
    display: inline-block;
  }
  
  .about-content {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
  }
  
  .about-item {
    flex: 1;
    min-width: 280px;
    background-color: #f9f9f9;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    
    h3 {
      font-size: 18px;
      margin-bottom: 10px;
      color: #007bff;
    }
    
    p {
      line-height: 1.6;
    }
  }
  
  /* Footer styles */
  .footer {
    text-align: center;
    padding: 20px;
    background-color: #f5f5f5;
    border-top: 1px solid #eee;
    margin-top: 40px;
  }
  
  /* Responsive adjustments */
  @media (max-width: 768px) {
    .header {
      flex-direction: column;
      height: auto;
      padding: 15px;
      
      .nav {
        margin-top: 15px;
        flex-wrap: wrap;
        justify-content: center;
      }
    }
    
    .about-item {
      min-width: 100%;
    }
  }