:root {
      --primary: #1f6fb2;
      --primary-dark: #154f80;
      --accent: #eaf5ff;
      --text: #1e293b;
      --muted: #64748b;
      --border: #dbe7f3;
      --white: #ffffff;
      --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
      --radius: 18px;
      --max-width: 1180px;
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }

    body {
      margin: 0;
      font-family: Arial, Helvetica, sans-serif;
      color: var(--text);
      background: linear-gradient(180deg, #f8fcff 0%, #ffffff 100%);
      line-height: 1.75;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
      border-radius: 14px;
    }

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

    a:hover {
      color: var(--primary-dark);
      text-decoration: underline;
    }

    .container {
      width: min(100% - 32px, var(--max-width));
      margin: 0 auto;
    }

    .topbar {
      background: #eff7ff;
      border-bottom: 1px solid var(--border);
      font-size: 14px;
      color: var(--muted);
    }

    .topbar .container {
      padding: 10px 0;
    }

    .hero {
      padding: 56px 0 36px;
      background:
        radial-gradient(circle at top left, rgba(31,111,178,0.10), transparent 32%),
        radial-gradient(circle at top right, rgba(31,111,178,0.08), transparent 28%),
        linear-gradient(180deg, #f4faff 0%, #ffffff 100%);
      border-bottom: 1px solid #edf4fb;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 32px;
      align-items: center;
    }

    .eyebrow {
      display: inline-block;
      padding: 8px 14px;
      border-radius: 999px;
      background: var(--accent);
      color: var(--primary-dark);
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 0.3px;
      margin-bottom: 18px;
    }

    h1 {
      font-size: clamp(30px, 5vw, 50px);
      line-height: 1.18;
      margin: 0 0 18px;
      color: #0f2740;
    }

    .hero p.lead {
      margin: 0 0 24px;
      font-size: 18px;
      color: #43576d;
      max-width: 760px;
    }

    .hero-card {
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      overflow: hidden;
    }

    .hero-card figure {
      margin: 0;
    }

    .hero-card img {
      width: 100%;
      aspect-ratio: 4 / 3;
      object-fit: cover;
      border-radius: 0;
      display: block;
    }

    .meta-row {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
      color: var(--muted);
      font-size: 14px;
    }

    .meta-pill {
      background: #fff;
      border: 1px solid var(--border);
      padding: 8px 12px;
      border-radius: 999px;
    }

    .main {
      padding: 42px 0 70px;
    }

    .content-grid {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 320px;
      gap: 30px;
      align-items: start;
    }

    .article { min-width: 0; }

    .card {
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      padding: 30px;
      margin-bottom: 24px;
    }

    .article h2 {
      font-size: 30px;
      line-height: 1.28;
      margin: 0 0 16px;
      color: #12385c;
    }

    .article h3 {
      font-size: 22px;
      line-height: 1.35;
      margin: 28px 0 12px;
      color: #174870;
    }

    .article p {
      margin: 0 0 16px;
      font-size: 17px;
    }

    .article ul,
    .article ol {
      margin: 0 0 18px 22px;
      padding: 0;
    }

    .article li {
      margin-bottom: 10px;
      font-size: 17px;
    }

    .highlight-box {
      background: linear-gradient(180deg, #f4faff 0%, #ffffff 100%);
      border: 1px solid #d8e8f7;
      border-left: 5px solid var(--primary);
      border-radius: 16px;
      padding: 20px 22px;
      margin: 22px 0;
    }

    .table-wrap {
      width: 100%;
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
      margin: 22px 0;
      border-radius: 16px;
      border: 1px solid var(--border);
    }

    table {
      width: 100%;
      min-width: 720px;
      border-collapse: collapse;
      background: #fff;
    }

    th, td {
      padding: 14px 16px;
      border-bottom: 1px solid #e7eef6;
      text-align: left;
      vertical-align: top;
      font-size: 15px;
    }

    th {
      background: #f1f8ff;
      color: #11395e;
      font-weight: 700;
    }

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

    .sidebar {
      position: sticky;
      top: 22px;
    }

    .sidebar .card {
      padding: 24px;
    }

    .toc-title,
    .cta-title {
      margin: 0 0 14px;
      font-size: 18px;
      color: #12385c;
    }

    .toc a {
      display: block;
      padding: 10px 0;
      border-bottom: 1px dashed #d8e6f3;
      color: #33506b;
      font-size: 15px;
    }

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

    .cta-box {
      background: linear-gradient(180deg, #1f6fb2 0%, #174f80 100%);
      color: #fff;
      border-radius: 18px;
      padding: 24px;
      box-shadow: var(--shadow);
    }

    .cta-box p {
      margin: 0 0 16px;
      color: rgba(255,255,255,0.92);
      font-size: 15px;
      line-height: 1.7;
    }

    .btn {
      display: inline-block;
      padding: 13px 18px;
      background: #fff;
      color: #155284 !important;
      border-radius: 12px;
      font-weight: 700;
      text-decoration: none;
      transition: transform 0.2s ease;
    }

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

    .faq-item {
      padding: 18px 0;
      border-bottom: 1px solid #e6eef6;
    }

    .faq-item:last-child {
      border-bottom: none;
      padding-bottom: 0;
    }

    .faq-item h3 {
      margin-top: 0;
      font-size: 20px;
    }

    .author-box {
      display: flex;
      gap: 16px;
      align-items: flex-start;
      padding: 22px;
      border-radius: 16px;
      background: #f6fbff;
      border: 1px solid #dfebf7;
    }

    .author-avatar {
      width: 58px;
      height: 58px;
      border-radius: 50%;
      background: linear-gradient(135deg, #cfe8ff 0%, #ebf6ff 100%);
      flex: 0 0 58px;
    }

    .footer-note {
      margin-top: 18px;
      font-size: 14px;
      color: var(--muted);
    }

    footer {
      border-top: 1px solid var(--border);
      background: #f8fbfe;
    }

    footer .container {
      padding: 22px 0 34px;
      color: #64748b;
      font-size: 14px;
    }

    @media (max-width: 992px) {
      .hero-grid,
      .content-grid {
        grid-template-columns: 1fr;
      }

      .sidebar {
        position: static;
      }

      .hero {
        padding-top: 38px;
      }
    }

    @media (max-width: 768px) {
      .container {
        width: min(100% - 20px, var(--max-width));
      }

      .card {
        padding: 22px 18px;
      }

      .article h2 {
        font-size: 25px;
      }

      .article h3 {
        font-size: 20px;
      }

      .article p,
      .article li {
        font-size: 16px;
      }

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

      .meta-row {
        gap: 10px;
      }

      th, td {
        padding: 12px 12px;
        font-size: 14px;
      }
    }