:root {
      --primary: rgb(66,133,244);
      --primary-hover: #1557b0;
      --glacier-blue: #1D7BFF;
      --deep-sea-ink: #0B132B;
      --silver-white: #F8FAFC;
      --dark-blue: #1C2541;
      --text-dark: #1E293B;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      color: var(--text-dark);
      background-color: var(--silver-white);
      line-height: 1.6;
    }

    a { color: inherit; text-decoration: none; transition: all 0.3s ease; }

    .logo { display: inline-flex; align-items: center; gap: 12px; }
    .logo img { display: block; height: 40px; max-width: 160px; object-fit: contain; }
    .logo span {
      font-size: 20px;
      font-weight: 800;
      background: linear-gradient(135deg, var(--deep-sea-ink) 0%, var(--glacier-blue) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.9);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
    }

    .header-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
      height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .desktop-nav { display: flex; gap: 32px; }
    .desktop-nav a { font-size: 15px; font-weight: 600; }
    .desktop-nav a:hover { color: var(--glacier-blue); }

    .header-actions .btn-primary-header {
      background: linear-gradient(135deg, var(--glacier-blue) 0%, var(--primary) 100%);
      color: #fff;
      padding: 10px 20px;
      border-radius: 8px;
      font-weight: 600;
    }

    .drawer-trigger { display: none; flex-direction: column; gap: 6px; background: none; border: none; cursor: pointer; }
    .drawer-trigger span { width: 24px; height: 2px; background-color: var(--deep-sea-ink); }

    .mobile-drawer { position: fixed; top: 0; left: -100%; width: 100%; height: 100%; z-index: 2000; transition: left 0.4s ease; }
    .mobile-drawer.active { left: 0; }
    .drawer-overlay { position: absolute; width: 100%; height: 100%; background: rgba(11, 19, 43, 0.5); }
    .drawer-content { position: absolute; width: 80%; max-width: 320px; height: 100%; background: #fff; padding: 24px; display: flex; flex-direction: column; }
    .drawer-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 40px; }
    .drawer-close { font-size: 28px; background: none; border: none; cursor: pointer; }
    .mobile-nav { display: flex; flex-direction: column; gap: 20px; }
    .mobile-nav a { font-size: 16px; font-weight: 600; padding-bottom: 10px; border-bottom: 1px solid var(--border-color); }

    
    .breadcrumb-section {
      max-width: 900px;
      margin: 24px auto 0;
      padding: 0 24px;
    }

    .breadcrumbs {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: var(--text-muted);
    }

    
    .article-main {
      max-width: 900px;
      margin: 24px auto 80px;
      padding: 0 24px;
    }

    .article-wrapper {
      background: #ffffff;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      padding: 48px;
    }

    .article-header {
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 32px;
      margin-bottom: 32px;
    }

    .article-meta-tags {
      margin-bottom: 16px;
    }

    .article-tag-badge {
      display: inline-block;
      padding: 4px 12px;
      background: rgba(29, 123, 255, 0.08);
      color: var(--glacier-blue);
      border-radius: 4px;
      font-size: 12px;
      font-weight: 700;
    }

    .article-meta-tags a {
      margin-right: 8px;
    }

    .article-headline {
      font-size: 32px;
      font-weight: 800;
      color: var(--deep-sea-ink);
      line-height: 1.35;
      margin-bottom: 20px;
    }

    .article-info-bar {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 20px;
      font-size: 13px;
      color: var(--text-muted);
    }

    .article-info-bar span {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    
    .article-body {
      font-size: 16px;
      color: #334155;
      line-height: 1.8;
    }

    .article-body p {
      margin-bottom: 24px;
    }

    .article-body h2, .article-body h3 {
      color: var(--deep-sea-ink);
      margin: 40px 0 20px;
      font-weight: 700;
    }

    .article-body h2 { font-size: 24px; border-left: 4px solid var(--glacier-blue); padding-left: 12px; }
    .article-body h3 { font-size: 20px; }

    .article-body img {
      border-radius: 8px;
      margin: 24px auto;
      display: block;
      box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    }

    
    .prev-next-section {
      border-top: 1px solid var(--border-color);
      padding-top: 32px;
      margin-top: 48px;
      display: flex;
      justify-content: space-between;
      gap: 24px;
    }

    .pn-card {
      flex: 1;
      background: var(--silver-white);
      border-radius: 8px;
      padding: 16px;
      border: 1px solid var(--border-color);
    }

    .pn-card:hover {
      border-color: var(--glacier-blue);
    }

    .pn-label {
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 4px;
    }

    .pn-title {
      font-size: 14px;
      font-weight: 700;
      color: var(--deep-sea-ink);
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    
    .related-section {
      margin-top: 64px;
    }

    .related-title {
      font-size: 20px;
      font-weight: 800;
      color: var(--deep-sea-ink);
      margin-bottom: 24px;
    }

    .related-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 24px;
    }

    .related-card {
      background: #fff;
      border-radius: 10px;
      border: 1px solid var(--border-color);
      overflow: hidden;
    }

    .related-card img {
      width: 100%;
      height: 150px;
      object-fit: cover;
    }

    .related-info {
      padding: 16px;
    }

    .related-info h4 {
      font-size: 15px;
      color: var(--deep-sea-ink);
      line-height: 1.4;
      margin-bottom: 8px;
    }

    
    .site-footer { background: #0B132B; color: #94A3B8; font-size: 14px; }
    .footer-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 80px 24px 48px;
      display: grid;
      grid-template-columns: 1.5fr repeat(3, 1fr);
      gap: 48px;
    }
    .brand-desc { margin-top: 20px; line-height: 1.8; color: #64748B; }
    .footer-col h4 { color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 24px; position: relative; }
    .footer-col h4::after { content: ''; position: absolute; bottom: -8px; left: 0; width: 30px; height: 2px; background: var(--glacier-blue); }
    .footer-links { list-style: none; display: flex; flex-direction: column; gap: 12px; }
    .footer-links a:hover { color: #fff; padding-left: 4px; }
    .footer-bottom { background: #070D1F; padding: 24px 24px; border-top: 1px solid rgba(255,255,255,0.05); text-align: center; font-size: 13px; }

    @media (max-width: 768px) {
      .drawer-trigger { display: flex; }
      .desktop-nav, .header-actions .btn-primary-header { display: none; }
      .article-wrapper { padding: 24px; }
      .prev-next-section { flex-direction: column; }
      .footer-container { grid-template-columns: 1fr; gap: 32px; }
    }