body {
      font-family: Arial, Helvetica, sans-serif;
      background: #f6f7f9;
      margin: 0;
      padding: 0;
      color: #333;
      line-height: 1.7;
    }

    .container {
      max-width: 1100px;
      margin: 0 auto;
      padding: 30px 20px;
    }

    h1 {
      text-align: center;
      margin-bottom: 40px;
      color: #333;
    }

    article {
      background: #ffffff;
      border-radius: 10px;
      padding: 30px;
      margin-bottom: 40px;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
    }

    article h2 {
      color: #333;
      margin-top: 0;
    }

    article h3 {
      margin-top: 25px;
      color: #333;
    }

    ul {
      padding-left: 20px;
    }

    li {
      margin-bottom: 6px;
    }

    .divider {
      margin: 30px 0;
      border-top: 1px solid #e5e7eb;
    }

    .blog-toc {
      background: #fff;
      border: 1px solid #e5e7eb;
      padding: 15px;
      border-radius: 8px;
      margin-bottom: 30px;
    }

    .blog-toc ul {
      list-style: none;
      padding: 0;
    }

    .blog-toc li {
      margin-bottom: 8px;
    }

    .blog-toc {
      background: #ffffff;
      border: 1px solid #e5e7eb;
      padding: 20px;
      border-radius: 10px;
      margin-bottom: 40px;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    }

    .blog-toc .toc-title {
      display: block;
      font-size: 18px;
      margin-bottom: 12px;
      color: #333;
    }

    .blog-toc ul {
      list-style: none;
      padding: 0;
      margin: 0;
    }

    .blog-toc li {
      margin-bottom: 10px;
    }

    .blog-toc a {
      text-decoration: none;
      color: #0f172a;
      font-size: 15px;
      transition: color 0.2s ease;
    }

    .blog-toc a:hover {
      color: #fd5f00;
    }