:root {
      --primary: #1D7BFF;
      --accent: rgb(255,184,108);
      --dark-bg: #0A1128;
      --light-bg: #F4F7FC;
      --text-dark: #111827;
      --text-light: #F3F4F6;
      --text-gray: #6B7280;
      --border-color: #E5E7EB;
    }
    * { margin: 0; padding: 0; box-sizing: border-box; }
    body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; color: var(--text-dark); background-color: #ffffff; line-height: 1.6; }
    a { text-decoration: none; color: inherit; transition: all 0.3s ease; }
    
    header { background-color: var(--dark-bg); color: var(--text-light); position: sticky; top: 0; z-index: 100; border-bottom: 1px solid rgba(255, 255, 255, 0.1); }
    .header-container { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; 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; flex-shrink: 0; }
    .logo span { display: inline-block; font-size: 20px; font-weight: 800; line-height: 1; color: var(--text-light); white-space: nowrap; }
    .nav-links { display: flex; align-items: center; gap: 24px; }
    .nav-links a { font-size: 15px; color: rgba(255, 255, 255, 0.8); font-weight: 500; }
    .nav-cta { background-color: var(--primary); color: #fff; padding: 8px 18px; border-radius: 6px; font-weight: bold; }
    .menu-btn { display: none; background: none; border: none; color: var(--text-light); font-size: 24px; cursor: pointer; }

    .drawer-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.6); z-index: 199; opacity: 0; pointer-events: none; transition: opacity 0.3s; }
    .drawer-overlay.active { opacity: 1; pointer-events: auto; }
    .drawer { position: fixed; top: 0; left: -300px; width: 300px; height: 100%; background-color: var(--dark-bg); color: var(--text-light); z-index: 200; padding: 25px; transition: left 0.3s ease; display: flex; flex-direction: column; gap: 30px; }

    
    .article-banner { background-color: var(--light-bg); border-bottom: 1px solid var(--border-color); padding: 20px 0; }
    .breadcrumb-container { max-width: 900px; margin: 0 auto; padding: 0 20px; font-size: 14px; color: var(--text-gray); }
    .breadcrumb-container a:hover { color: var(--primary); }

    
    .article-container { max-width: 900px; margin: 50px auto; padding: 0 20px; }
    .article-header { border-bottom: 1px solid var(--border-color); padding-bottom: 30px; margin-bottom: 30px; }
    .article-title { font-size: 32px; font-weight: 800; line-height: 1.3; margin-bottom: 20px; color: var(--text-dark); }
    
    .meta-box { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; font-size: 14px; color: var(--text-gray); }
    .meta-box span { display: flex; align-items: center; gap: 6px; }
    .meta-tag-link { background: rgba(29, 123, 255, 0.08); color: var(--primary); padding: 3px 10px; border-radius: 4px; font-weight: 600; }

    .article-body { font-size: 16px; line-height: 1.8; color: #2D3748; margin-bottom: 50px; }
    .article-body p { margin-bottom: 25px; }
    .article-body h2, .article-body h3 { margin: 40px 0 20px 0; font-weight: bold; color: var(--text-dark); }
    .article-body img { max-width: 100%; height: auto; border-radius: 8px; margin: 30px 0; box-shadow: 0 4px 10px rgba(0,0,0,0.05); }

    
    .prev-next-links { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color); padding: 25px 0; margin-bottom: 50px; }
    .nav-item { display: flex; flex-direction: column; gap: 5px; }
    .nav-label { font-size: 12px; color: var(--text-gray); text-transform: uppercase; letter-spacing: 0.5px; }
    .nav-title { font-size: 15px; font-weight: bold; color: var(--text-dark); }
    .nav-title:hover { color: var(--primary); }
    .nav-right { text-align: right; }

    
    .related-section { background-color: var(--light-bg); padding: 60px 20px; border-radius: 12px; }
    .related-title { font-size: 22px; font-weight: bold; margin-bottom: 30px; border-left: 4px solid var(--primary); padding-left: 12px; }
    .related-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; }
    .related-card { background: #fff; padding: 20px; border-radius: 8px; border: 1px solid var(--border-color); }
    .related-card h4 { font-size: 15px; font-weight: bold; margin-bottom: 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
    .related-card h4:hover { color: var(--primary); }
    .related-card span { font-size: 12px; color: var(--text-gray); }

    
    footer { background-color: var(--dark-bg); color: var(--text-light); padding: 60px 20px 20px 20px; border-top: 2px solid var(--primary); font-size: 14px; }
    .footer-grid { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: 40px; margin-bottom: 50px; }
    .footer-brand { display: flex; flex-direction: column; gap: 20px; }
    .footer-brand p { color: #A0AEC0; }
    .footer-title { font-size: 16px; font-weight: bold; color: #fff; margin-bottom: 20px; border-left: 3px solid var(--primary); padding-left: 10px; }
    .footer-links { list-style: none; display: flex; flex-direction: column; gap: 12px; }
    .footer-links a { color: #A0AEC0; }
    .footer-links a:hover { color: var(--accent); padding-left: 5px; }
    .footer-bottom { max-width: 1200px; margin: 0 auto; border-top: 1px solid rgba(255, 255, 255, 0.1); padding-top: 20px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px; color: #6B7280; }

    @media (max-width: 768px) {
      .menu-btn { display: block; }
      .nav-links { display: none; }
      .prev-next-links { grid-template-columns: 1fr; gap: 15px; }
      .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    }