* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
  }

  body {
      line-height: 1.6;
      color: #333;
      background-color: #f8f9fa;
  }

  .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
  }

  section {
      scroll-margin-top: 80px;
  }