:root {
      --primary-color: #1D7BFF;
      --dark-bg: #0B111E;
      --silver-white: #F5F7FA;
      --text-dark: #0F172A;
      --text-muted: #64748B;
      --glass-border: rgba(255, 255, 255, 0.08);
      --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body { font-family: var(--font-family); background-color: var(--silver-white); color: var(--text-dark); line-height: 1.6; }

    
    .site-header { background-color: var(--dark-bg); border-bottom: 1px solid var(--glass-border); position: sticky; top: 0; z-index: 1000; backdrop-filter: blur(10px); }
    .header-container { max-width: 1200px; margin: 0 auto; padding: 15px 20px; display: flex; align-items: center; justify-content: space-between; }
    .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: #fff; white-space: nowrap; }
    .desktop-nav { display: flex; gap: 30px; }
    .desktop-nav a { color: #D1D5DB; text-decoration: none; font-weight: 500; font-size: 15px; }
    .desktop-nav a:hover { color: var(--primary-color); }
    .header-actions { display: flex; align-items: center; gap: 15px; }
    .btn { display: inline-flex; align-items: center; justify-content: center; padding: 10px 20px; border-radius: 6px; font-weight: 600; text-decoration: none; cursor: pointer; transition: 0.3s; }
    .btn-primary { background-color: var(--primary-color); color: #fff; border: none; }
    .btn-sm { padding: 8px 16px; font-size: 14px; }
    .mobile-menu-btn { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 6px; }
    .mobile-menu-btn span { display: block; width: 25px; height: 2px; background-color: #fff; }

    
    .mobile-drawer-mask { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; background-color: rgba(0,0,0,0.6); z-index: 1001; opacity: 0; pointer-events: none; transition: 0.3s; }
    .mobile-drawer-mask.active { opacity: 1; pointer-events: auto; }
    .mobile-drawer { position: fixed; top: 0; left: -320px; width: 300px; height: 100vh; background-color: var(--dark-bg); z-index: 1002; padding: 25px; display: flex; flex-direction: column; transition: 0.3s; }
    .mobile-drawer.active { left: 0; }
    .drawer-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 40px; }
    .drawer-close-btn { background: none; border: none; font-size: 28px; color: #fff; cursor: pointer; }
    .drawer-nav { display: flex; flex-direction: column; gap: 20px; }
    .drawer-nav a { color: #D1D5DB; text-decoration: none; font-size: 18px; }
    .drawer-footer { border-top: 1px solid var(--glass-border); padding-top: 20px; color: #9CA3AF; font-size: 14px; }

    
    .breadcrumbs { background: #fff; border-bottom: 1px solid #E2E8F0; padding: 15px 20px; }
    .breadcrumbs-container { max-width: 1200px; margin: 0 auto; font-size: 14px; color: var(--text-muted); }
    .breadcrumbs-container a { color: var(--primary-color); text-decoration: none; }

    
    .article-container { max-width: 900px; margin: 40px auto; padding: 0 20px; }
    .article-main-card { background: #fff; border: 1px solid #E2E8F0; border-radius: 12px; padding: 40px; margin-bottom: 40px; }
    .article-header { border-bottom: 1px solid #E2E8F0; padding-bottom: 30px; margin-bottom: 30px; }
    .article-meta { display: flex; flex-wrap: wrap; gap: 20px; color: var(--text-muted); font-size: 14px; margin-bottom: 20px; }
    .article-title-text { font-size: 32px; font-weight: 800; color: var(--text-dark); line-height: 1.3; }

    
    .article-body-content { font-size: 16px; color: #334155; line-height: 1.8; }
    .article-body-content p { margin-bottom: 20px; }
    .article-body-content h2 { font-size: 24px; color: var(--text-dark); margin: 40px 0 20px; font-weight: 700; }
    .article-body-content img { max-width: 100%; height: auto; border-radius: 8px; margin: 20px 0; display: block; }

    
    .article-tags { margin-top: 40px; padding-top: 20px; border-top: 1px dashed #E2E8F0; display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
    .tag-title-label { font-size: 14px; color: var(--text-muted); font-weight: 600; }
    .tag-bubble { font-size: 13px; background: rgba(29, 123, 255, 0.08); color: var(--primary-color); padding: 5px 12px; border-radius: 6px; text-decoration: none; transition: 0.3s; }
    .tag-bubble:hover { background: var(--primary-color); color: #fff; }

    
    .prev-next-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 40px; }
    .pn-card { background: #fff; border: 1px solid #E2E8F0; border-radius: 8px; padding: 20px; text-decoration: none; display: flex; flex-direction: column; justify-content: center; }
    .pn-card:hover { border-color: var(--primary-color); }
    .pn-label { font-size: 12px; color: var(--text-muted); margin-bottom: 5px; }
    .pn-title { font-size: 15px; font-weight: 700; color: var(--text-dark); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

    
    .related-section { margin-top: 60px; }
    .related-title { font-size: 22px; font-weight: 700; margin-bottom: 25px; color: var(--text-dark); }
    .related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 25px; }
    .rel-card { background: #fff; border: 1px solid #E2E8F0; border-radius: 8px; overflow: hidden; display: flex; flex-direction: column; text-decoration: none; transition: 0.3s; }
    .rel-card:hover { transform: translateY(-3px); border-color: var(--primary-color); }
    .rel-img { height: 140px; width: 100%; object-fit: cover; }
    .rel-info { padding: 15px; display: flex; flex-direction: column; justify-content: space-between; flex-grow: 1; }
    .rel-info h4 { font-size: 15px; color: var(--text-dark); font-weight: 700; margin-bottom: 10px; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
    .rel-time { font-size: 12px; color: var(--text-muted); }

    
    .site-footer { background-color: var(--dark-bg); color: #9CA3AF; padding: 80px 20px 40px; border-top: 1px solid var(--glass-border); }
    .footer-container { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 60px; margin-bottom: 60px; }
    .footer-brand .logo { margin-bottom: 20px; }
    .footer-desc { font-size: 14px; line-height: 1.6; }
    .footer-links-col h4 { color: #fff; font-size: 16px; margin-bottom: 20px; }
    .footer-links-col ul { list-style: none; }
    .footer-links-col ul li { margin-bottom: 12px; }
    .footer-links-col ul li a { color: #9CA3AF; text-decoration: none; font-size: 14px; transition: color 0.3s; }
    .footer-links-col ul li a:hover { color: var(--primary-color); }
    .footer-bottom { border-top: 1px solid var(--glass-border); padding-top: 30px; }
    .footer-bottom-container { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; font-size: 14px; }
    .footer-bottom-container a { color: #9CA3AF; text-decoration: none; }
    .footer-bottom-container a:hover { color: var(--primary-color); }

    @media (max-width: 768px) {
      .desktop-nav, .header-actions .btn { display: none; }
      .mobile-menu-btn { display: flex; }
      .prev-next-nav { grid-template-columns: 1fr; }
      .related-grid { grid-template-columns: 1fr; }
      .footer-container { grid-template-columns: 1fr; gap: 40px; }
      .footer-bottom-container { flex-direction: column; gap: 15px; text-align: center; }
    }