:root {
      --primary: #0f6fb8;
      --primary-dark: #084b7c;
      --secondary: #e8f5ff;
      --accent: #27a7d8;
      --text: #1f2937;
      --muted: #667085;
      --border: #d9e8f5;
      --shadow: 0 18px 45px rgba(15, 111, 184, 0.12);
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: Arial, Helvetica, sans-serif;
      color: var(--text);
      background: #ffffff;
      line-height: 1.7;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    a {
      color: var(--primary);
      text-decoration: none;
      font-weight: 600;
    }

    a:hover {
      text-decoration: underline;
    }

    .blog-wrapper {
      width: 100%;
      background: linear-gradient(180deg, #f4fbff 0%, #ffffff 38%);
    }

    .container {
      width: 100%;
      max-width: 1180px;
      margin: 0 auto;
      padding: 0 22px;
    }

    .hero {
      padding: 70px 0 48px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.05fr 0.95fr;
      gap: 42px;
      align-items: center;
    }

    .label {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 14px;
      border-radius: 999px;
      background: var(--secondary);
      color: var(--primary-dark);
      font-size: 14px;
      font-weight: 700;
      margin-bottom: 18px;
    }

    .label span {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--accent);
      display: inline-block;
    }

    h1 {
      font-size: 46px;
      line-height: 1.15;
      margin: 0 0 20px;
      color: #0b2f4a;
      letter-spacing: -0.8px;
    }

    .hero p {
      font-size: 18px;
      color: #475467;
      margin: 0 0 26px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-top: 28px;
    }

    .btn {
      display: inline-block;
      padding: 14px 22px;
      border-radius: 12px;
      font-size: 15px;
      font-weight: 700;
      text-decoration: none;
    }

    .btn-primary {
      background: var(--primary);
      color: #ffffff;
      box-shadow: 0 12px 24px rgba(15, 111, 184, 0.2);
    }

    .btn-primary:hover {
      color: #ffffff;
      text-decoration: none;
      background: var(--primary-dark);
    }

    .btn-outline {
      border: 1px solid var(--border);
      color: var(--primary-dark);
      background: #ffffff;
    }

    .hero-card {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: 28px;
      box-shadow: var(--shadow);
      padding: 18px;
      overflow: hidden;
    }

    .hero-image {
      width: 100%;
      aspect-ratio: 4 / 3;
      border-radius: 22px;
      overflow: hidden;
      background: #edf6ff;
    }

    .hero-image img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .content-layout {
      display: grid;
      grid-template-columns: 280px 1fr;
      gap: 36px;
      align-items: start;
      padding-bottom: 70px;
    }

    .toc {
      position: sticky;
      top: 20px;
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: 20px;
      padding: 22px;
      box-shadow: 0 10px 28px rgba(16, 24, 40, 0.06);
    }

    .toc h3 {
      margin: 0 0 14px;
      font-size: 17px;
      color: #0b2f4a;
    }

    .toc a {
      display: block;
      padding: 9px 0;
      color: #475467;
      font-size: 14px;
      border-bottom: 1px solid #edf2f7;
      font-weight: 500;
    }

    .toc a:last-child {
      border-bottom: none;
    }

    .article {
      background: #ffffff;
    }

    .section {
      margin-bottom: 42px;
      scroll-margin-top: 20px;
    }

    .section h2 {
      font-size: 30px;
      line-height: 1.25;
      color: #0b2f4a;
      margin: 0 0 16px;
    }

    .section h3 {
      font-size: 22px;
      color: #123f63;
      margin: 28px 0 12px;
    }

    .section p {
      font-size: 16.5px;
      color: #344054;
      margin: 0 0 16px;
    }

    .blue-box {
      background: linear-gradient(135deg, #eaf7ff 0%, #f8fcff 100%);
      border: 1px solid var(--border);
      border-left: 5px solid var(--primary);
      border-radius: 18px;
      padding: 24px;
      margin: 28px 0;
    }

    .blue-box p {
      margin: 0;
    }

    .steps {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 18px;
      margin-top: 22px;
    }

    .step-card {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: 18px;
      padding: 22px;
      box-shadow: 0 8px 24px rgba(16, 24, 40, 0.04);
    }

    .step-number {
      width: 38px;
      height: 38px;
      border-radius: 12px;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      margin-bottom: 14px;
    }

    .step-card h3 {
      margin: 0 0 8px;
      font-size: 18px;
      color: #0b2f4a;
    }

    .step-card p {
      margin: 0;
      font-size: 15px;
      color: #475467;
    }

    .comparison-table,
    .parameter-table {
      width: 100%;
      border-collapse: collapse;
      margin: 24px 0;
      overflow: hidden;
      border-radius: 16px;
      border: 1px solid var(--border);
    }

    .comparison-table th,
    .comparison-table td,
    .parameter-table th,
    .parameter-table td {
      padding: 15px;
      border-bottom: 1px solid var(--border);
      text-align: left;
      vertical-align: top;
      font-size: 15px;
    }

    .comparison-table th,
    .parameter-table th {
      background: #edf7ff;
      color: #0b2f4a;
      font-weight: 800;
    }

    .comparison-table tr:last-child td,
    .parameter-table tr:last-child td {
      border-bottom: none;
    }

    .feature-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 18px;
      margin: 24px 0;
    }

    .feature-card {
      background: #fbfdff;
      border: 1px solid var(--border);
      border-radius: 18px;
      padding: 20px;
    }

    .feature-card h3 {
      margin: 0 0 8px;
      font-size: 17px;
      color: var(--primary-dark);
    }

    .feature-card p {
      margin: 0;
      font-size: 14.5px;
      color: #475467;
    }

    .product-cta {
      margin: 46px 0;
      background: linear-gradient(135deg, #0f6fb8 0%, #17a2d4 100%);
      border-radius: 28px;
      padding: 34px;
      color: #ffffff;
      display: grid;
      grid-template-columns: 1.25fr 0.75fr;
      gap: 24px;
      align-items: center;
      overflow: hidden;
    }

    .product-cta h2 {
      margin: 0 0 12px;
      color: #ffffff;
      font-size: 30px;
    }

    .product-cta p {
      color: #eaf8ff;
      margin: 0 0 20px;
    }

    .product-cta a {
      color: var(--primary);
      background: #ffffff;
      padding: 13px 20px;
      border-radius: 12px;
      display: inline-block;
      font-weight: 800;
      text-decoration: none;
    }

    .product-cta img {
      width: 100%;
      aspect-ratio: 4 / 3;
      object-fit: cover;
      border-radius: 20px;
      background: #ffffff;
    }

    .faq-item {
      border: 1px solid var(--border);
      border-radius: 18px;
      padding: 22px;
      margin-bottom: 16px;
      background: #ffffff;
    }

    .faq-item h3 {
      margin: 0 0 8px;
      font-size: 18px;
      color: #0b2f4a;
    }

    .faq-item p {
      margin: 0;
      color: #475467;
    }

    .final-note {
      background: #f9fbfd;
      border: 1px solid var(--border);
      border-radius: 20px;
      padding: 26px;
      margin-top: 32px;
    }

    .final-note p {
      margin: 0;
    }

    @media (max-width: 900px) {
      .hero-grid,
      .content-layout,
      .product-cta {
        grid-template-columns: 1fr;
      }

      .toc {
        position: static;
      }

      h1 {
        font-size: 36px;
      }

      .section h2 {
        font-size: 26px;
      }

      .feature-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 640px) {
      .hero {
        padding: 42px 0 32px;
      }

      .container {
        padding: 0 16px;
      }

      h1 {
        font-size: 31px;
      }

      .hero p,
      .section p {
        font-size: 16px;
      }

      .steps {
        grid-template-columns: 1fr;
      }

      .comparison-table,
      .parameter-table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
      }

      .product-cta {
        padding: 24px;
        border-radius: 22px;
      }
    }