* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: Arial, sans-serif;
      background: #f8fafc;
      color: #334155;
      line-height: 1.8;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    header {
      background: #fff;
      border-bottom: 1px solid #e2e8f0;
      padding: 18px 7%;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
    }

    .logo {
      color: #2563eb;
      font-size: 25px;
      font-weight: 800;
    }

    nav {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }

    nav a {
      color: #475569;
      font-size: 14px;
    }

    nav a:hover,
    .content a:hover {
      color: #2563eb;
    }

    .hero {
      text-align: center;
      background: #eff6ff;
      padding: 58px 20px;
    }

    .tag {
      display: inline-block;
      background: #dbeafe;
      color: #1d4ed8;
      padding: 5px 13px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: bold;
      margin-bottom: 14px;
    }

    h1 {
      color: #0f172a;
      font-size: clamp(32px, 5vw, 44px);
      line-height: 1.3;
      margin-bottom: 12px;
    }

    .hero p {
      color: #64748b;
    }

    .content {
      max-width: 950px;
      margin: 38px auto 60px;
      padding: 0 22px;
    }

    .notice {
      padding: 18px;
      background: #fff;
      border: 1px solid #bfdbfe;
      border-left: 4px solid #2563eb;
      border-radius: 8px;
      margin-bottom: 28px;
    }

    .content h2 {
      color: #0f172a;
      font-size: 22px;
      margin: 30px 0 10px;
      line-height: 1.4;
    }

    .content h3 {
      color: #1e293b;
      font-size: 17px;
      margin: 18px 0 8px;
    }

    .content p {
      margin-bottom: 13px;
    }

    .content ul,
    .content ol {
      padding-left: 24px;
      margin-bottom: 16px;
    }

    .content li {
      margin-bottom: 8px;
    }

    .content a {
      color: #2563eb;
      text-decoration: underline;
      overflow-wrap: anywhere;
    }

    .updated {
      color: #64748b;
      font-size: 14px;
      margin-bottom: 20px;
    }

    footer {
      background: #fff;
      border-top: 1px solid #e2e8f0;
      text-align: center;
      padding: 25px 7%;
      color: #64748b;
      font-size: 14px;
    }

    .footer-links {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 18px;
      margin-bottom: 12px;
    }

    @media (max-width: 600px) {
      header {
        padding: 16px 5%;
      }

      nav {
        gap: 12px;
      }

      .content {
        padding: 0 17px;
      }
    }