:root {
      --primary-color: #1b6bb3;
      --primary-dark: #134d82;
      --accent-color: #f2f5fa;
      --text-color: #222;
      --muted-text: #666;
      --border-color: #e0e4ec;
      --max-width: 960px;
      --radius: 10px;
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
      color: var(--text-color);
      background: #ffffff;
      line-height: 1.6;
    }

    .page-wrapper {
      padding: 20px;
    }

    .container {
      max-width: var(--max-width);
      margin: 0 auto;
    }

    header.article-header {
      margin-bottom: 24px;
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 16px;
    }

    .badge {
      display: inline-block;
      font-size: 12px;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      padding: 4px 8px;
      border-radius: 999px;
      background: var(--accent-color);
      color: var(--primary-dark);
      margin-bottom: 8px;
    }

    h1 {
      font-size: 28px;
      margin: 8px 0 10px;
    }

    @media (min-width: 768px) {
      h1 {
        font-size: 32px;
      }
    }

    .meta {
      font-size: 13px;
      color: var(--muted-text);
    }

    .hero-box {
      margin: 24px 0;
      padding: 18px 16px;
      border-radius: var(--radius);
      background: var(--accent-color);
      border: 1px solid var(--border-color);
    }

    .hero-box strong {
      display: block;
      margin-bottom: 4px;
    }

    main {
      display: grid;
      grid-template-columns: 1fr;
      gap: 24px;
    }

    @media (min-width: 960px) {
      main {
        grid-template-columns: minmax(0, 2.2fr) minmax(260px, 1fr);
        align-items: flex-start;
      }
    }

    article {
      font-size: 15px;
    }

    h2 {
      font-size: 22px;
      margin-top: 24px;
      margin-bottom: 8px;
    }

    h3 {
      font-size: 18px;
      margin-top: 20px;
      margin-bottom: 6px;
    }

    p {
      margin: 10px 0;
    }

    ul {
      padding-left: 20px;
      margin: 8px 0 12px;
    }

    li {
      margin-bottom: 6px;
    }

    .highlight {
      background: #fffdf4;
      border-left: 3px solid #f0c14b;
      padding: 10px 12px;
      border-radius: 6px;
      font-size: 14px;
    }

    .seo-keywords {
      font-size: 13px;
      color: var(--muted-text);
      padding: 10px 12px;
      border-radius: 6px;
      background: #fafafa;
      border: 1px dashed var(--border-color);
      margin-top: 10px;
    }

    /* CTA Sidebar / Block */
    .sidebar {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .cta-card {
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      padding: 18px 16px;
      background: #ffffff;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
      position: sticky;
      top: 16px;
    }

    .cta-card h2 {
      font-size: 18px;
      margin-top: 0;
      margin-bottom: 8px;
    }

    .cta-card p {
      font-size: 14px;
      margin: 6px 0;
    }

    .cta-tagline {
      font-size: 13px;
      color: var(--muted-text);
    }

    .cta-button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      margin-top: 10px;
      padding: 10px 18px;
      background: var(--primary-color);
      color: #ffffff;
      text-decoration: none;
      border-radius: 999px;
      font-weight: 600;
      font-size: 14px;
      border: none;
      cursor: pointer;
      transition: background 0.2s ease, transform 0.1s ease;
      white-space: nowrap;
    }

    .cta-button:hover {
      background: var(--primary-dark);
      transform: translateY(-1px);
    }

    .cta-button span {
      margin-left: 6px;
      font-size: 18px;
      line-height: 1;
    }

    .cta-mini {
      margin-top: 12px;
      font-size: 13px;
      color: var(--muted-text);
    }

    /* FAQ */
    .faq-section {
      margin-top: 30px;
      border-top: 1px solid var(--border-color);
      padding-top: 20px;
    }

    .faq-item {
      border-radius: 8px;
      border: 1px solid var(--border-color);
      padding: 12px 14px;
      margin-bottom: 10px;
      background: #fafbff;
    }

    .faq-question {
      font-weight: 600;
      margin-bottom: 4px;
    }

    .faq-answer {
      font-size: 14px;
      color: var(--muted-text);
    }

    footer.article-footer {
      margin-top: 26px;
      padding-top: 16px;
      border-top: 1px solid var(--border-color);
      font-size: 13px;
      color: var(--muted-text);
    }

    /* Mobile tweaks */
    @media (max-width: 767px) {
      .cta-card {
        position: static;
      }
    }