:root {
      --primary: rgb(66, 133, 244);
      --primary-dark: #1A54B2;
      --ice-blue: #1D7BFF;
      --ice-glow: rgba(29, 123, 255, 0.15);
      --dark-ink: #0A0F1D;
      --silver-white: #F8FAFC;
      --text-light: #F8FAFC;
      --text-dark: #0F172A;
      --text-muted: #64748B;
      --text-silver: #94A3B8;
      --border-color: rgba(255, 255, 255, 0.08);
      --border-light: #E2E8F0;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--silver-white);
      color: var(--text-dark);
      line-height: 1.8;
    }

    header {
      background: var(--dark-ink);
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 100;
      backdrop-filter: blur(12px);
    }
    .header-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 16px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .logo { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
    .logo img { display: block; height: 40px; width: auto; max-width: 160px; object-fit: contain; flex-shrink: 0; }
    .logo span { display: inline-block; font-size: 20px; font-weight: 800; color: var(--text-light); white-space: nowrap; }
    .nav-desktop { display: flex; align-items: center; gap: 32px; }
    .nav-desktop a { color: var(--text-silver); text-decoration: none; font-size: 15px; font-weight: 500; transition: var(--transition); }
    .nav-desktop a:hover { color: var(--ice-blue); }
    .menu-toggle { display: none; background: none; border: none; color: var(--text-light); font-size: 24px; cursor: pointer; }

    
    .drawer-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.6); z-index: 1000; opacity: 0; visibility: hidden; transition: var(--transition); }
    .drawer-overlay.active { opacity: 1; visibility: visible; }
    .mobile-drawer { position: fixed; top: 0; left: -300px; width: 300px; height: 100%; background: var(--dark-ink); z-index: 1001; transition: var(--transition); display: flex; flex-direction: column; padding: 24px; }
    .mobile-drawer.active { left: 0; }
    .drawer-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 32px; }
    .drawer-close { background: none; border: none; color: var(--text-light); font-size: 24px; cursor: pointer; }
    .drawer-nav { display: flex; flex-direction: column; gap: 20px; }
    .drawer-nav a { color: var(--text-silver); text-decoration: none; font-size: 16px; font-weight: 500; padding: 10px 0; border-bottom: 1px solid var(--border-color); }

    
    .breadcrumb-area {
      background: #fff;
      border-bottom: 1px solid var(--border-light);
      padding: 15px 24px;
    }
    .breadcrumb-container {
      max-width: 1200px;
      margin: 0 auto;
      font-size: 14px;
      color: var(--text-muted);
    }
    .breadcrumb-container a { color: var(--primary); text-decoration: none; }

    
    .article-wrapper {
      max-width: 900px;
      margin: 40px auto;
      padding: 0 24px;
    }

    .article-header {
      background: #fff;
      border: 1px solid var(--border-light);
      border-radius: 12px;
      padding: 40px;
      margin-bottom: 30px;
    }

    .article-title-text {
      font-size: 28px;
      font-weight: 800;
      color: var(--text-dark);
      line-height: 1.4;
      margin-bottom: 20px;
    }

    .article-meta-bar {
      display: flex;
      flex-wrap: wrap;
      gap: 20px;
      font-size: 13px;
      color: var(--text-muted);
      border-top: 1px solid var(--border-light);
      padding-top: 20px;
    }

    .article-content {
      background: #fff;
      border: 1px solid var(--border-light);
      border-radius: 12px;
      padding: 40px;
      margin-bottom: 30px;
      font-size: 16px;
      color: #334155;
    }

    .article-content h2 {
      font-size: 22px;
      font-weight: 800;
      margin-top: 30px;
      margin-bottom: 16px;
      color: var(--text-dark);
    }

    .article-content p {
      margin-bottom: 20px;
    }

    .article-content img {
      max-width: 100%;
      height: auto;
      border-radius: 8px;
      margin: 20px 0;
    }

    
    .siblings-box {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
      margin-bottom: 30px;
    }

    .sibling-link {
      background: #fff;
      border: 1px solid var(--border-light);
      border-radius: 8px;
      padding: 20px;
      text-decoration: none;
      color: var(--text-dark);
      transition: var(--transition);
    }

    .sibling-link:hover {
      border-color: var(--primary);
    }

    .sibling-label {
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 8px;
      display: block;
    }

    
    .related-section {
      background: #fff;
      border: 1px solid var(--border-light);
      border-radius: 12px;
      padding: 40px;
    }

    .related-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 24px;
    }

    .related-item {
      text-decoration: none;
      color: var(--text-dark);
    }

    .related-item img {
      width: 100%;
      height: 120px;
      object-fit: cover;
      border-radius: 6px;
      margin-bottom: 10px;
    }

    
    footer {
      background: var(--dark-ink);
      color: var(--text-silver);
      border-top: 1px solid var(--border-color);
      padding: 60px 24px 30px;
      margin-top: 80px;
    }

    .footer-container {
      max-width: 1200px;
      margin: 0 auto;
      display: grid;
      grid-template-columns: 2fr repeat(2, 1fr);
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-brand { display: flex; flex-direction: column; gap: 16px; }
    .footer-links-group h4 { color: #fff; font-size: 16px; margin-bottom: 20px; }
    .footer-links-group ul { list-style: none; }
    .footer-links-group ul li { margin-bottom: 12px; }
    .footer-links-group ul li a { color: var(--text-silver); text-decoration: none; font-size: 14px; }
    .footer-links-group ul li a:hover { color: var(--ice-blue); }
    .footer-bottom {
      max-width: 1200px;
      margin: 0 auto;
      border-top: 1px solid var(--border-color);
      padding-top: 30px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
      font-size: 13px;
    }

    @media (max-width: 768px) {
      .nav-desktop { display: none; }
      .menu-toggle { display: block; }
      .siblings-box { grid-template-columns: 1fr; }
      .related-grid { grid-template-columns: 1fr; }
    }