:root {
      --primary: #0052a3;
      --primary-light: #e6f0fb;
      --accent: #f9a826;
      --text: #1f2933;
      --muted: #6b7785;
      --bg: #f7f9fc;
      --radius-lg: 14px;
      --radius-md: 10px;
      --shadow-soft: 0 10px 30px rgba(15, 35, 52, 0.08);
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
      color: var(--text);
      background-color: var(--bg);
      line-height: 1.7;
    }

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

    a:hover {
      text-decoration: underline;
    }

    .page-wrapper {
      max-width: 1120px;
      margin: 0 auto;
      padding: 16px 16px 40px;
    }

    header.blog-header {
      background: linear-gradient(135deg, #ffffff 0%, #f2f6ff 60%, #e3efff 100%);
      border-radius: 24px;
      padding: 28px 22px;
      margin-top: 16px;
      margin-bottom: 26px;
      box-shadow: var(--shadow-soft);
      display: grid;
      grid-template-columns: minmax(0, 3fr) minmax(0, 2.3fr);
      gap: 24px;
      align-items: center;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 10px;
      border-radius: 999px;
      background-color: var(--primary-light);
      color: var(--primary);
      font-size: 12px;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.06em;
      margin-bottom: 10px;
    }

    .badge span.icon {
      font-size: 14px;
    }

    .blog-title {
      font-size: 28px;
      line-height: 1.25;
      margin: 0 0 10px;
      color: var(--text);
    }

    .blog-subtitle {
      font-size: 15px;
      color: var(--muted);
      margin: 0 0 16px;
    }

    .meta {
      font-size: 13px;
      color: var(--muted);
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
      align-items: center;
    }

    .meta span::before {
      content: "•";
      margin: 0 6px 0 0;
      color: #c0cad8;
    }

    .meta span:first-child::before {
      content: "";
      margin: 0;
    }

    .hero-image-wrapper {
      position: relative;
      border-radius: 18px;
      overflow: hidden;
      background-color: #dbe7ff;
      box-shadow: var(--shadow-soft);
    }

    .hero-image-wrapper img {
      display: block;
      width: 100%;
      height: auto;
    }

    .image-note {
      position: absolute;
      left: 12px;
      bottom: 10px;
      padding: 4px 10px;
      font-size: 11px;
      border-radius: 999px;
      background: rgba(0, 0, 0, 0.60);
      color: #fff;
      backdrop-filter: blur(4px);
    }

    main {
      display: grid;
      grid-template-columns: minmax(0, 3fr) minmax(260px, 1.15fr);
      gap: 26px;
    }

    article {
      background-color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 24px 22px 30px;
      box-shadow: var(--shadow-soft);
    }

    article h2 {
      font-size: 21px;
      margin-top: 24px;
      margin-bottom: 10px;
    }

    article h3 {
      font-size: 18px;
      margin-top: 20px;
      margin-bottom: 8px;
    }

    article p {
      margin: 0 0 12px;
      font-size: 15px;
    }

    article ul,
    article ol {
      padding-left: 20px;
      margin: 0 0 14px;
      font-size: 15px;
    }

    article li + li {
      margin-top: 4px;
    }

    .highlight-box {
      border-radius: var(--radius-md);
      background-color: var(--primary-light);
      padding: 14px 16px;
      font-size: 14px;
      margin: 16px 0;
      border-left: 3px solid var(--primary);
    }

    .table-wrapper {
      overflow-x: auto;
      margin: 14px 0 16px;
    }

    table {
      width: 100%;
      border-collapse: collapse;
      font-size: 14px;
      background-color: #ffffff;
      border-radius: 10px;
      overflow: hidden;
    }

    thead {
      background-color: #f0f4ff;
    }

    th,
    td {
      padding: 9px 10px;
      text-align: left;
      border-bottom: 1px solid #e3e7f0;
    }

    th {
      font-weight: 600;
      color: #243248;
    }

    tr:last-child td {
      border-bottom: none;
    }

    .two-column {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 18px;
      margin: 12px 0 4px;
    }

    .card {
      border-radius: var(--radius-md);
      border: 1px solid #e3e7f0;
      padding: 12px 14px;
      background-color: #fdfefe;
      font-size: 14px;
    }

    .card h4 {
      margin: 0 0 6px;
      font-size: 15px;
      color: var(--text);
    }

    .cta-section {
      margin-top: 24px;
      padding: 18px 16px;
      border-radius: var(--radius-md);
      background: linear-gradient(135deg, #0052a3 0%, #0f72d5 50%, #22a6ff 100%);
      color: #ffffff;
      text-align: center;
    }

    .cta-section p {
      margin: 4px 0 12px;
      color: #e4efff;
    }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      border-radius: 999px;
      font-size: 15px;
      font-weight: 600;
      border: none;
      background-color: #ffffff;
      color: var(--primary);
      text-decoration: none;
      box-shadow: 0 6px 18px rgba(0, 0, 0, 0.16);
      transition: transform 0.12s ease, box-shadow 0.12s ease, background-color 0.12s ease;
      cursor: pointer;
    }

    .btn-primary span {
      margin-left: 6px;
      font-size: 16px;
    }

    .btn-primary:hover {
      text-decoration: none;
      transform: translateY(-1px);
      box-shadow: 0 10px 24px rgba(0, 0, 0, 0.18);
      background-color: #f4f7ff;
    }

    aside.sidebar {
      display: flex;
      flex-direction: column;
      gap: 18px;
    }

    .sidebar-card {
      background-color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 16px 16px 18px;
      box-shadow: var(--shadow-soft);
      font-size: 14px;
    }

    .sidebar-card h3 {
      font-size: 16px;
      margin: 0 0 8px;
    }

    .sidebar-list {
      list-style: none;
      padding: 0;
      margin: 0;
    }

    .sidebar-list li {
      padding: 6px 0;
      border-bottom: 1px solid #edf0f7;
    }

    .sidebar-list li:last-child {
      border-bottom: none;
    }

    .tag-list {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-top: 8px;
    }

    .tag {
      padding: 4px 10px;
      border-radius: 999px;
      background-color: #f3f4f8;
      color: var(--muted);
      font-size: 12px;
    }

    .image-block {
      margin: 18px 0 10px;
      border-radius: var(--radius-md);
      overflow: hidden;
      background-color: #dde6f7;
    }

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

    .image-caption {
      font-size: 12px;
      color: var(--muted);
      padding: 6px 8px 8px;
      background-color: #f8f9fc;
    }

    footer.blog-footer {
      text-align: center;
      font-size: 12px;
      color: var(--muted);
      margin-top: 26px;
      padding: 10px 0 0;
    }

    @media (max-width: 900px) {
      header.blog-header {
        grid-template-columns: minmax(0, 1fr);
      }
      main {
        grid-template-columns: minmax(0, 1fr);
      }
    }

    @media (max-width: 600px) {
      .page-wrapper {
        padding: 10px 10px 26px;
      }

      header.blog-header {
        padding: 20px 16px;
        margin-top: 10px;
      }

      .blog-title {
        font-size: 23px;
      }

      article {
        padding: 18px 15px 24px;
      }
    }