body {
      margin: 0;
      padding: 0;
      font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Segoe UI", Roboto, sans-serif;
      background-color: #f9f9f9;
      color: #333;
      line-height: 1.6;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 40px 20px;
      background-color: #fff;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
      border-radius: 16px;
    }

    p {
      font-size: 17px;
      margin-bottom: 1.5em;
    }

    .center {
      text-align: center;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
      margin: 20px auto;
      border-radius: 12px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    }

    @media (max-width: 768px) {
      .container {
        padding: 24px 16px;
      }

      p {
        font-size: 16px;
      }
    }