:root {
      --primary-color: rgb(79,70,229);
      --primary-hover: rgb(67,56,202);
      --accent-blue: #1D7BFF;
      --glacier-blue: #E0F2FE;
      --deep-sea: #0B0F19;
      --silver-white: #F8FAFC;
      --text-primary: #0F172A;
      --text-secondary: #475569;
      --border-color: #E2E8F0;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
      --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08);
      --radius: 12px;
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; color: var(--text-primary); background-color: var(--silver-white); line-height: 1.8; }
    a { color: inherit; text-decoration: none; transition: 0.3s; }
    .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }

    
    header { background: rgba(255, 255, 255, 0.95); backdrop-filter: blur(8px); border-bottom: 1px solid var(--border-color); position: sticky; top: 0; z-index: 100; height: 70px; }
    .header-container { display: flex; justify-content: space-between; align-items: center; height: 100%; }
    .logo { display: inline-flex; align-items: center; gap: 12px; }
    .logo img { height: 40px; max-width: 160px; object-fit: contain; }
    .logo span { font-size: 18px; font-weight: 800; }
    .nav-desktop { display: flex; align-items: center; gap: 24px; }
    .nav-desktop a { font-weight: 500; color: var(--text-secondary); }
    .nav-desktop a:hover { color: var(--primary-color); }
    .menu-toggle { display: none; background: none; border: none; font-size: 24px; cursor: pointer; }

    
    .drawer-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.5); z-index: 998; opacity: 0; visibility: hidden; transition: 0.3s; }
    .drawer { position: fixed; top: 0; left: -280px; width: 280px; height: 100%; background: #fff; z-index: 999; box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1); transition: 0.3s; display: flex; flex-direction: column; padding: 20px; }
    .drawer.active { left: 0; }
    .drawer-overlay.active { opacity: 1; visibility: visible; }
    .drawer-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 30px; border-bottom: 1px solid var(--border-color); padding-bottom: 15px; }
    .drawer-close { background: none; border: none; font-size: 24px; cursor: pointer; }
    .drawer-menu { display: flex; flex-direction: column; gap: 16px; }

    
    .breadcrumbs-wrap { background: #fff; padding: 15px 0; border-bottom: 1px solid var(--border-color); font-size: 14px; color: var(--text-secondary); }
    .breadcrumbs-wrap a:hover { color: var(--primary-color); }

    
    .article-layout { display: grid; grid-template-columns: 2.8fr 1.2fr; gap: 40px; padding: 40px 0; }
    .article-card-main { background: #fff; border-radius: var(--radius); border: 1px solid var(--border-color); padding: 40px; }
    .article-header h1 { font-size: 32px; font-weight: 800; line-height: 1.3; margin-bottom: 20px; }
    .article-meta-row { display: flex; flex-wrap: wrap; gap: 20px; font-size: 14px; color: var(--text-secondary); border-bottom: 1px solid var(--border-color); padding-bottom: 20px; margin-bottom: 30px; }
    .article-body-content { font-size: 16px; color: #334155; }
    .article-body-content p { margin-bottom: 20px; }
    .article-body-content img { border-radius: 8px; margin: 20px 0; max-width: 100%; height: auto; }

    
    .prev-next-box { display: flex; justify-content: space-between; border-top: 1px solid var(--border-color); padding-top: 30px; margin-top: 50px; gap: 20px; }
    .pn-item { width: 50%; padding: 15px; border: 1px solid var(--border-color); border-radius: 8px; transition: 0.3s; }
    .pn-item:hover { border-color: var(--primary-color); background: var(--silver-white); }
    .pn-label { font-size: 12px; color: var(--text-secondary); margin-bottom: 5px; }
    .pn-title { font-size: 15px; font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

    
    .related-section { margin-top: 60px; }
    .related-title { font-size: 20px; font-weight: 800; margin-bottom: 24px; }
    .related-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
    .rel-card { background: #fff; border: 1px solid var(--border-color); border-radius: var(--radius); overflow: hidden; display: flex; gap: 16px; padding: 16px; transition: 0.3s; }
    .rel-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-sm); }
    .rel-img { width: 100px; height: 80px; object-fit: cover; border-radius: 6px; flex-shrink: 0; background: #eee; }
    .rel-info { display: flex; flex-direction: column; justify-content: space-between; }
    .rel-info h4 { font-size: 14px; font-weight: 700; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

    
    .sidebar { display: flex; flex-direction: column; gap: 30px; }
    .widget { background: #fff; border-radius: var(--radius); padding: 24px; border: 1px solid var(--border-color); }
    .widget-title { font-size: 18px; font-weight: 700; margin-bottom: 20px; border-left: 4px solid var(--primary-color); padding-left: 12px; }
    .tag-cloud-sidebar { display: flex; flex-wrap: wrap; gap: 8px; }
    .tag-cloud-sidebar a { background: var(--silver-white); border: 1px solid var(--border-color); padding: 6px 12px; border-radius: 4px; font-size: 13px; }
    .tag-cloud-sidebar a:hover { background: var(--primary-color); color: #fff; border-color: var(--primary-color); }

    
    footer { background: #0f172a; color: #94a3b8; padding: 60px 0 30px; font-size: 14px; }
    .footer-grid { display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: 40px; margin-bottom: 40px; }
    .footer-logo-desc { display: flex; flex-direction: column; gap: 20px; }
    .footer-logo-desc .logo span { color: #fff; }
    .footer-col h4 { color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 20px; }
    .footer-links { list-style: none; display: flex; flex-direction: column; gap: 12px; }
    .footer-links a:hover { color: #fff; }
    .footer-bottom { border-top: 1px solid #1e293b; padding-top: 30px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px; }

    @media (max-width: 1024px) {
      .article-layout { grid-template-columns: 1fr; }
      .sidebar { display: none; }
    }
    @media (max-width: 768px) {
      .nav-desktop { display: none; }
      .menu-toggle { display: block; }
      .footer-grid { grid-template-columns: 1fr; }
      .prev-next-box { flex-direction: column; }
      .pn-item { width: 100%; }
      .related-grid { grid-template-columns: 1fr; }
    }