:root {
      --primary: rgb(29,78,216);
      --primary-hover: #1e40af;
      --primary-glow: rgba(29, 78, 216, 0.15);
      --tech-blue: #1D7BFF;
      --ice-blue: #38BDF8;
      --silver: #F8FAFC;
      --dark-ink: #0F172A;
      --dark-slate: #1E293B;
      --gray-text: #64748B;
      --border-color: #E2E8F0;
      --card-bg: #FFFFFF;
      --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, sans-serif; background-color: #F8FAFC; color: var(--dark-ink); }
    a { color: inherit; text-decoration: none; transition: var(--transition); }
    
    .site-header { background-color: rgba(255, 255, 255, 0.95); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border-color); position: sticky; top:0; z-index:1000; }
    .header-container { max-width: 1200px; margin: 0 auto; padding: 0 20px; height: 72px; display: flex; align-items: center; justify-content: space-between; }
    .logo { display: inline-flex; align-items: center; gap: 12px; }
    .logo img { display: block; height: 40px; width: auto; max-width: 160px; object-fit: contain; }
    .logo span { font-size: 18px; font-weight: 800; color: var(--dark-ink); }
    .desktop-nav { display: flex; align-items: center; gap: 32px; }
    .desktop-nav a { font-size: 15px; font-weight: 500; color: var(--dark-slate); }
    .desktop-nav a:hover { color: var(--primary); }
    .header-actions { display: flex; align-items: center; gap: 16px; }
    .btn { display: inline-flex; align-items: center; justify-content: center; padding: 10px 20px; font-size: 14px; font-weight: 600; border-radius: 8px; cursor: pointer; transition: var(--transition); border: none; }
    .btn-primary { background-color: var(--primary); color: #FFF; }
    .btn-primary:hover { background-color: var(--primary-hover); }
    .mobile-menu-toggle { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 6px; }
    .mobile-menu-toggle span { display: block; width: 24px; height: 2px; background-color: var(--dark-ink); }

    
    .drawer-overlay { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; background-color: rgba(15, 23, 42, 0.6); opacity: 0; visibility: hidden; z-index: 1001; transition: var(--transition); }
    .drawer-overlay.active { opacity: 1; visibility: visible; }
    .mobile-drawer { position: fixed; top: 0; left: -320px; width: 300px; height: 100vh; background-color: #FFF; z-index: 1002; box-shadow: 4px 0 24px rgba(0, 0, 0, 0.15); display: flex; flex-direction: column; transition: var(--transition); }
    .mobile-drawer.active { left: 0; }
    .drawer-header { padding: 20px; border-bottom: 1px solid var(--border-color); display: flex; align-items: center; justify-content: space-between; }
    .drawer-close { background: none; border: none; font-size: 24px; cursor: pointer; color: var(--gray-text); }
    .drawer-nav { padding: 20px; display: flex; flex-direction: column; gap: 16px; }
    .drawer-nav a { font-size: 16px; font-weight: 600; color: var(--dark-slate); padding: 8px 0; border-bottom: 1px solid #F1F5F9; }
    .drawer-footer { margin-top: auto; padding: 20px; border-top: 1px solid var(--border-color); }
    .btn-drawer { display: block; width: 100%; text-align: center; padding: 12px; background-color: var(--primary); color: #FFF; border-radius: 8px; font-weight: 600; }

    
    .article-container { max-width: 900px; margin: 40px auto; padding: 0 20px; }
    .article-header { border-bottom: 1px solid var(--border-color); padding-bottom: 24px; margin-bottom: 30px; }
    .article-header h1 { font-size: 32px; font-weight: 800; line-height: 1.3; color: var(--dark-ink); margin-bottom: 16px; }
    .article-meta-info { display: flex; flex-wrap: wrap; gap: 20px; font-size: 13px; color: var(--gray-text); }
    .article-meta-info span { display: flex; align-items: center; gap: 6px; }

    
    .article-body-content { font-size: 16px; line-height: 1.8; color: var(--dark-slate); }
    .article-body-content p { margin-bottom: 24px; }
    .article-body-content h2 { font-size: 22px; font-weight: 700; margin: 40px 0 20px; color: var(--dark-ink); }
    .article-body-content img { max-width: 100%; height: auto; border-radius: 8px; margin: 20px 0; }

    
    .detail-tags-wrap { margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--border-color); display: flex; gap: 10px; }
    .detail-tag-item { background-color: var(--silver); color: var(--dark-slate); font-size: 13px; padding: 6px 12px; border-radius: 6px; }
    .detail-tag-item:hover { background-color: var(--primary-glow); color: var(--primary); }

    
    .prev-next-box { display: flex; justify-content: space-between; gap: 20px; margin-top: 40px; border-top: 1px solid var(--border-color); padding-top: 24px; }
    .pn-link { flex: 1; padding: 16px; background-color: #FFF; border: 1px solid var(--border-color); border-radius: 8px; }
    .pn-link:hover { border-color: var(--primary); }
    .pn-label { font-size: 12px; color: var(--gray-text); margin-bottom: 4px; }
    .pn-title { font-size: 14px; font-weight: 700; }

    
    .related-wrap { margin-top: 60px; }
    .related-wrap h3 { font-size: 22px; font-weight: 800; margin-bottom: 24px; }
    .related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
    .related-card { background: #FFF; border: 1px solid var(--border-color); border-radius: 10px; overflow: hidden; display: flex; flex-direction: column; }
    .related-card-body { padding: 16px; flex-grow: 1; display: flex; flex-direction: column; }
    .related-card-body h4 { font-size: 15px; font-weight: 700; line-height: 1.4; margin-bottom: 10px; }
    .related-card-body h4 a:hover { color: var(--primary); }
    .related-card-desc { font-size: 13px; color: var(--gray-text); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 10px; }

    
    .site-footer { background-color: #0F172A; color: #94A3B8; border-top: 1px solid rgba(255, 255, 255, 0.05); padding: 60px 0 20px; }
    .footer-container { max-width: 1200px; margin: 0 auto; padding: 0 20px; display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 40px; }
    .footer-brand .logo span { color: #FFF; }
    .footer-brand .brand-desc { margin-top: 16px; font-size: 14px; line-height: 1.6; }
    .footer-container h4 { color: #FFF; font-size: 16px; margin-bottom: 20px; font-weight: 600; }
    .footer-container ul { list-style: none; }
    .footer-container ul li { margin-bottom: 12px; }
    .footer-container ul li a:hover { color: #FFF; }
    .footer-contact p { font-size: 14px; margin-bottom: 12px; }
    .footer-bottom { max-width: 1200px; margin: 40px auto 0; padding: 24px 20px 0; border-top: 1px solid rgba(255, 255, 255, 0.05); text-align: center; font-size: 12px; }

    @media (max-width: 768px) {
      .desktop-nav, .header-actions .btn-primary { display: none; }
      .mobile-menu-toggle { display: flex; }
      .related-grid { grid-template-columns: 1fr; }
      .prev-next-box { flex-direction: column; }
    }