body {
      margin: 0;
      line-height: 1.7;
    }

    .page-wrapper {
      max-width: 1100px;
      margin: 0 auto;
      padding: 30px 18px;
    }

    .article-box {
      background: #ffffff;
      padding: 35px;
      border-radius: 14px;
      box-shadow: 0 8px 25px rgba(0, 0, 0, 0.06);
    }

    .page-wrapper h1 {
      font-size: 36px;
      line-height: 1.3;
      color: #172554;
      margin-bottom: 20px;
    }

   .page-wrapper h2 {
      font-size: 26px;
      color: #1e3a8a;
      margin-top: 35px;
      margin-bottom: 12px;
      border-left: 5px solid #2563eb;
      padding-left: 12px;
    }

    .page-wrapper h3 {
      font-size: 21px;
      color: #1d4ed8;
      margin-top: 24px;
      margin-bottom: 10px;
    }

    .page-wrapper p {
      font-size: 17px;
      margin-bottom: 16px;
    }

    .page-wrapper strong {
      /* color: #0f172a; */
      font-weight: 700;
    }

    .intro {
      background: #eff6ff;
      padding: 20px;
      border-radius: 10px;
      border: 1px solid #bfdbfe;
    }

    .faq-box {
      background: #f8fafc;
      padding: 18px;
      border-radius: 10px;
      margin-top: 18px;
      border: 1px solid #e2e8f0;
    }

    .conclusion {
      background: #ecfdf5;
      padding: 20px;
      border-radius: 10px;
      border: 1px solid #bbf7d0;
      margin-top: 25px;
    }

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

      .page-wrapper h1 {
        font-size: 28px;
      }

      .page-wrapper h2 {
        font-size: 22px;
      }

      .page-wrapper h3 {
        font-size: 19px;
      }

      .page-wrapper p {
        font-size: 16px;
      }
    }