:root {
    --primary: #0b5fc2;
    --primary-dark: #073f85;
    --primary-soft: #eaf4ff;
    --accent: #36a3ff;
    --text: #172033;
    --muted: #5d6a7c;
    --border: #dbe7f5;
    --bg: #ffffff;
    --soft-bg: #f6faff;
    --success: #0f9f6e;
    --warning: #f59e0b;
    --radius: 20px;
    --shadow: 0 18px 45px rgba(13, 58, 120, 0.10);
  }

  * {
    box-sizing: border-box;
  }

  body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.72;
  }

  a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 700;
  }

  a:hover {
    text-decoration: underline;
  }

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

  .em-blog {
    width: 100%;
    overflow: hidden;
  }

  .container {
    width: min(1180px, 92%);
    margin: 0 auto;
  }

  .hero {
    background:
      radial-gradient(circle at 88% 10%, rgba(54, 163, 255, 0.22), transparent 30%),
      linear-gradient(135deg, #eef7ff 0%, #ffffff 52%, #f3f8ff 100%);
    padding: 72px 0 56px;
    border-bottom: 1px solid var(--border);
  }

  .hero-grid {
    display: grid;
    grid-template-columns: 1.08fr 0.92fr;
    gap: 42px;
    align-items: center;
  }

  .eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: 999px;
    background: #ffffff;
    border: 1px solid var(--border);
    color: var(--primary-dark);
    font-size: 14px;
    font-weight: 800;
    box-shadow: 0 8px 22px rgba(13, 58, 120, 0.06);
  }

  .hero h1 {
    margin: 20px 0 18px;
    font-size: clamp(34px, 5vw, 58px);
    line-height: 1.06;
    letter-spacing: -0.04em;
    color: var(--primary-dark);
  }

  .hero p {
    font-size: 18px;
    color: var(--muted);
    max-width: 720px;
    margin: 0 0 24px;
  }

  .hero-card {
    background: rgba(255,255,255,0.86);
    border: 1px solid var(--border);
    border-radius: 28px;
    padding: 18px;
    box-shadow: var(--shadow);
  }

  .blog-image {
    position: relative;
    width: 100%;
    overflow: hidden;
    border-radius: 22px;
    background: #eef7ff;
    border: 1px solid var(--border);
    box-shadow: 0 12px 28px rgba(13, 58, 120, 0.08);
  }

  .blog-image img {
    width: 100%;
    height: 100%;
    display: block;
    object-position: center;
  }

  .blog-image.cover img {
    object-fit: cover;
  }

  .blog-image.contain img {
    object-fit: contain;
    background: #ffffff;
  }

  .ratio-4-3 {
    aspect-ratio: 4 / 3;
  }

  .ratio-16-9 {
    aspect-ratio: 16 / 9;
  }

  .image-caption {
    margin-top: 10px;
    font-size: 13px;
    color: var(--muted);
    text-align: center;
  }

  .image-replace-note {
    position: absolute;
    left: 12px;
    bottom: 12px;
    background: rgba(255,255,255,0.92);
    color: #315071;
    border: 1px solid rgba(219,231,245,0.9);
    border-radius: 999px;
    padding: 6px 10px;
    font-size: 12px;
    font-weight: 700;
    box-shadow: 0 8px 20px rgba(13,58,120,0.08);
  }

  .cta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 24px;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 22px;
    border-radius: 14px;
    font-weight: 800;
    transition: all 0.2s ease;
    border: 1px solid transparent;
  }

  .btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 12px 28px rgba(11, 95, 194, 0.24);
  }

  .btn-primary:hover {
    background: var(--primary-dark);
    text-decoration: none;
    transform: translateY(-1px);
  }

  .btn-secondary {
    background: #fff;
    color: var(--primary-dark);
    border-color: var(--border);
  }

  .btn-secondary:hover {
    text-decoration: none;
    border-color: var(--primary);
  }

  .content-wrap {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 42px;
    padding: 58px 0;
  }

  .article {
    min-width: 0;
  }

  .article section {
    margin-bottom: 54px;
  }

  .article h2 {
    font-size: clamp(26px, 3vw, 38px);
    line-height: 1.18;
    margin: 0 0 18px;
    color: var(--primary-dark);
    letter-spacing: -0.025em;
  }

  .article h3 {
    font-size: 22px;
    margin: 26px 0 10px;
    color: #1b2a41;
  }

  .article p {
    margin: 0 0 16px;
    color: #334155;
    font-size: 16px;
  }

  .article ul {
    margin: 14px 0 0;
    padding-left: 22px;
  }

  .article li {
    margin-bottom: 8px;
    color: #334155;
  }

  .toc {
    position: sticky;
    top: 24px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 22px;
    height: fit-content;
  }

  .toc h3 {
    margin: 0 0 14px;
    font-size: 18px;
    color: var(--primary-dark);
  }

  .toc a {
    display: block;
    padding: 9px 0;
    border-bottom: 1px solid #edf3fb;
    color: var(--muted);
    font-size: 14px;
    font-weight: 700;
  }

  .toc a:last-child {
    border-bottom: 0;
  }

  .toc .toc-cta {
    margin-top: 18px;
    padding-top: 18px;
    border-top: 1px solid var(--border);
  }

  .info-box {
    background: var(--primary-soft);
    border: 1px solid #c9def7;
    border-radius: var(--radius);
    padding: 24px;
    margin: 26px 0;
  }

  .info-box strong {
    color: var(--primary-dark);
  }

  .comparison-table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    border-radius: 18px;
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    margin: 24px 0;
  }

  .comparison-table th,
  .comparison-table td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    vertical-align: top;
  }

  .comparison-table th {
    background: linear-gradient(135deg, var(--primary), #2b8cff);
    color: #fff;
    font-size: 15px;
  }

  .comparison-table tr:last-child td {
    border-bottom: 0;
  }

  .comparison-table td:first-child {
    font-weight: 800;
    color: var(--primary-dark);
    width: 24%;
  }

  .tag-good {
    color: var(--success);
    font-weight: 800;
  }

  .tag-limited {
    color: var(--warning);
    font-weight: 800;
  }

  .cards {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
    margin: 24px 0;
  }

  .card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 22px;
    box-shadow: 0 10px 28px rgba(13, 58, 120, 0.07);
  }

  .card h3 {
    margin-top: 0;
    font-size: 20px;
    color: var(--primary-dark);
  }

  .highlight {
    background: linear-gradient(135deg, #0b5fc2, #36a3ff);
    color: #fff;
    border-radius: 26px;
    padding: 34px;
    margin: 36px 0;
    box-shadow: var(--shadow);
  }

  .highlight h2,
  .highlight h3,
  .highlight p,
  .highlight li {
    color: #fff;
  }

  .highlight .btn {
    background: #fff;
    color: var(--primary-dark);
    margin-top: 8px;
  }

  .faq-item {
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 14px;
    background: #fff;
    box-shadow: 0 8px 22px rgba(13, 58, 120, 0.05);
  }

  .faq-item h3 {
    margin: 0 0 8px;
    font-size: 18px;
    color: var(--primary-dark);
  }

  .final-cta {
    background:
      radial-gradient(circle at 20% 0%, rgba(255,255,255,0.22), transparent 28%),
      linear-gradient(135deg, #062f69, #0b5fc2);
    color: #fff;
    padding: 56px 0;
    text-align: center;
  }

  .final-cta h2 {
    color: #fff;
    font-size: clamp(28px, 4vw, 44px);
    margin: 0 0 14px;
    line-height: 1.15;
  }

  .final-cta p {
    color: rgba(255,255,255,0.86);
    max-width: 760px;
    margin: 0 auto 24px;
    font-size: 17px;
  }

  .final-cta .btn {
    background: #fff;
    color: var(--primary-dark);
  }

  .note {
    font-size: 14px;
    color: var(--muted);
    border-left: 4px solid var(--primary);
    padding-left: 14px;
    margin-top: 18px;
  }

  @media (max-width: 960px) {
    .hero-grid,
    .content-wrap {
      grid-template-columns: 1fr;
    }

    .toc {
      position: static;
      order: -1;
    }

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

  @media (max-width: 640px) {
    .hero {
      padding: 48px 0 38px;
    }

    .content-wrap {
      padding: 42px 0;
    }

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

    .comparison-table th,
    .comparison-table td {
      min-width: 180px;
    }

    .btn {
      width: 100%;
    }

    .image-replace-note {
      font-size: 11px;
    }
  }