body {
      font-family: 'Roboto', sans-serif;
      line-height: 1.7;
      color: #333;
      background-color: #fff;
    }
    main {
      padding: 80px 20px;
      max-width: 900px;
      margin: 0 auto;
    }
    h1, h2, h3 {
      font-weight: 600;
      color: #F36B1C;
      margin-top: 40px;
    }
    h1 {
      text-align: center;
      margin-bottom: 60px;
    }
    h2 {
      border-bottom: 2px solid #eaeaea;
      padding-bottom: 10px;
      margin-top: 50px;
    }
    ul {
      margin-left: 25px;
    }
    ol {
      margin-left: 25px;
    }
    a {
      color: #F36B1C;
    }
    .toc {
      background: #f9f9f9;
      border: 1px solid #eee;
      border-radius: 6px;
      padding: 20px;
      margin-bottom: 40px;
    }
    .toc ul {
      list-style: none;
      padding-left: 0;
    }
    .toc li {
      margin: 8px 0;
    }