:root {
      --primary-color: #1D7BFF;
      --secondary-color: #00F0FF;
      --dark-bg: rgb(31,41,55);
      --darker-bg: #111827;
      --light-bg: #F3F4F6;
      --silver-white: #F9FAFB;
      --text-main: #111827;
      --text-muted: #6B7280;
      --border-color: #E5E7EB;
      --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
      --glass-border: rgba(255, 255, 255, 0.1);
    }
    * { 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-main); background: var(--silver-white); line-height: 1.6; }
    a { color: inherit; text-decoration: none; transition: all 0.3s; }

    
    .header { background: var(--dark-bg); position: sticky; top: 0; z-index: 100; border-bottom: 1px solid var(--glass-border); }
    .header-container { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; padding: 15px 20px; }
    .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 { display: inline-block; font-size: 20px; font-weight: 800; color: #FFF; }
    .nav-menu { display: flex; align-items: center; gap: 24px; }
    .nav-menu a { color: rgba(255,255,255,0.8); font-size: 15px; font-weight: 500; }
    .nav-menu a:hover { color: var(--secondary-color); }
    .menu-toggle { display: none; background: none; border: none; color: #FFF; 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: 1000; opacity: 0; pointer-events: none; transition: opacity 0.3s ease; }
    .drawer { position: fixed; top: 0; left: -280px; width: 280px; height: 100%; background: var(--dark-bg); z-index: 1001; transition: left 0.3s ease; }
    .drawer-header { padding: 20px; border-bottom: 1px solid var(--glass-border); display: flex; align-items: center; justify-content: space-between; }
    .drawer-close { background: none; border: none; color: #FFF; font-size: 24px; cursor: pointer; }
    .drawer-content { flex: 1; overflow-y: auto; padding: 20px; }
    .drawer-nav { display: flex; flex-direction: column; gap: 20px; }
    .drawer-nav a { color: #FFF; font-size: 16px; font-weight: 500; padding-bottom: 8px; border-bottom: 1px solid rgba(255,255,255,0.05); }
    .drawer-overlay.active { opacity: 1; pointer-events: auto; }
    .drawer.active { left: 0; }

    
    .breadcrumb-section { background: #FFF; border-bottom: 1px solid var(--border-color); padding: 15px 20px; }
    .breadcrumb-container { max-width: 1200px; margin: 0 auto; font-size: 13px; color: var(--text-muted); }
    .breadcrumb-container a { color: var(--primary-color); }

    
    .article-layout { max-width: 1200px; margin: 50px auto; padding: 0 20px; display: grid; grid-template-columns: 2.5fr 1fr; gap: 40px; }
    .main-article { background: #FFF; border: 1px solid var(--border-color); border-radius: 16px; padding: 40px; box-shadow: var(--card-shadow); }
    
    .art-header { margin-bottom: 30px; border-bottom: 1px solid var(--border-color); padding-bottom: 25px; }
    .art-meta-info { display: flex; flex-wrap: wrap; gap: 20px; font-size: 13px; color: var(--text-muted); margin-bottom: 15px; }
    .art-meta-info span { display: flex; align-items: center; gap: 6px; }
    .art-h1-title { font-size: 32px; font-weight: 800; line-height: 1.3; color: var(--text-main); margin-bottom: 20px; }
    
    .art-body-content { font-size: 16px; line-height: 1.8; color: #374151; }
    .art-body-content p { margin-bottom: 24px; }
    .art-body-content h2, .art-body-content h3 { color: var(--text-main); font-weight: 700; margin-top: 40px; margin-bottom: 16px; }
    .art-body-content h2 { font-size: 22px; border-left: 4px solid var(--primary-color); padding-left: 12px; }
    .art-body-content h3 { font-size: 18px; }
    .art-body-content img { border-radius: 8px; margin: 20px 0; }

    
    .prev-next-section { display: flex; justify-content: space-between; border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color); padding: 25px 0; margin: 40px 0; font-size: 14px; gap: 20px; }
    .prev-link, .next-link { flex: 1; display: flex; flex-direction: column; }
    .prev-link span, .next-link span { font-size: 11px; color: var(--text-muted); text-transform: uppercase; margin-bottom: 5px; }
    .prev-link a, .next-link a { font-weight: 700; color: var(--text-main); }
    .prev-link a:hover, .next-link a:hover { color: var(--primary-color); }

    
    .related-section { margin-top: 50px; }
    .related-title { font-size: 18px; font-weight: 700; margin-bottom: 20px; }
    .related-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
    .rel-card { background: var(--light-bg); border-radius: 8px; border: 1px solid var(--border-color); padding: 20px; display: flex; gap: 15px; }
    .rel-card img { width: 80px; height: 80px; object-fit: cover; border-radius: 6px; background: #E5E7EB; }
    .rel-info h4 { font-size: 14px; font-weight: 700; line-height: 1.4; margin-bottom: 8px; }

    
    .sidebar { display: flex; flex-direction: column; gap: 30px; }
    .widget { background: #FFF; border: 1px solid var(--border-color); border-radius: 12px; padding: 25px; }
    .widget-title { font-size: 16px; font-weight: 700; border-left: 4px solid var(--primary-color); padding-left: 10px; margin-bottom: 20px; }
    .hot-list { display: flex; flex-direction: column; gap: 15px; }
    .hot-item { display: flex; gap: 12px; align-items: center; }
    .hot-num { font-size: 18px; font-weight: 800; color: var(--primary-color); width: 24px; }
    .hot-info h4 { font-size: 13px; font-weight: 600; line-height: 1.4; }

    
    .footer { background: var(--darker-bg); color: rgba(255,255,255,0.6); padding: 80px 20px 40px; border-top: 1px solid rgba(255,255,255,0.05); }
    .footer-container { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; margin-bottom: 60px; }
    .footer-brand .logo { margin-bottom: 20px; }
    .footer-brand .logo span { color: #FFF; }
    .footer-desc { font-size: 13px; line-height: 1.6; margin-bottom: 20px; }
    .footer-title { font-size: 15px; font-weight: 700; color: #FFF; margin-bottom: 20px; }
    .footer-links { list-style: none; }
    .footer-links li { margin-bottom: 12px; }
    .footer-links a { font-size: 13px; color: rgba(255,255,255,0.6); }
    .footer-links a:hover { color: var(--primary-color); }
    .footer-contact p { font-size: 13px; margin-bottom: 10px; display: flex; align-items: center; gap: 8px; }
    .footer-bottom { max-width: 1200px; margin: 0 auto; padding-top: 30px; border-top: 1px solid rgba(255,255,255,0.05); display: flex; justify-content: space-between; align-items: center; font-size: 12px; flex-wrap: wrap; gap: 15px; }

    @media (max-width: 991px) {
      .nav-menu { display: none; }
      .menu-toggle { display: block; }
      .article-layout { grid-template-columns: 1fr; }
      .footer-container { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .main-article { padding: 25px 20px; }
      .prev-next-section { flex-direction: column; gap: 15px; }
      .related-grid { grid-template-columns: 1fr; }
      .footer-container { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; text-align: center; }
    }