:root {
      --primary-color: rgb(52,168,83);
      --primary-hover: rgb(43,145,71);
      --dark-bg: #0A1128;
      --glacier-blue: #1D7BFF;
      --ice-silver: #F4F7FC;
      --text-main: #333333;
      --text-muted: #666666;
      --border-color: #E2E8F0;
      --card-shadow: 0 10px 30px rgba(0,0,0,0.05);
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; color: var(--text-main); background: #FAFBFD; }
    a { text-decoration: none; color: inherit; transition: all 0.3s ease; }
    
    
    .site-header { background: #FFFFFF; border-bottom: 1px solid var(--border-color); position: sticky; top: 0; z-index: 100; box-shadow: 0 2px 10px rgba(0,0,0,0.02); }
    .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; line-height: 1; color: var(--dark-bg); white-space: nowrap; }
    
    .desktop-nav { display: flex; align-items: center; gap: 24px; }
    .desktop-nav a { font-size: 15px; font-weight: 500; color: var(--text-main); padding: 6px 12px; border-radius: 4px; }
    .desktop-nav a:hover { color: var(--glacier-blue); background: var(--ice-silver); }
    
    .nav-toggle { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 6px; padding: 5px; }
    .nav-toggle span { display: block; width: 24px; height: 2px; background: var(--text-main); transition: 0.3s; }
    
    
    .drawer-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.5); z-index: 998; opacity: 0; pointer-events: none; transition: 0.3s; }
    .drawer-overlay.active { opacity: 1; pointer-events: auto; }
    .drawer { position: fixed; top: 0; left: -300px; width: 300px; height: 100%; background: #FFFFFF; z-index: 999; transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1); box-shadow: 5px 0 20px rgba(0,0,0,0.1); display: flex; flex-direction: column; }
    .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: 28px; cursor: pointer; color: var(--text-muted); }
    .drawer-content { flex: 1; overflow-y: auto; padding: 20px; }
    .drawer-nav { display: flex; flex-direction: column; gap: 15px; }
    .drawer-nav a { font-size: 16px; font-weight: 600; padding: 10px 15px; border-radius: 6px; color: var(--text-main); }
    .drawer-nav a:hover { background: var(--ice-silver); color: var(--glacier-blue); }

    
    .about-banner { background: linear-gradient(135deg, #11224D 0%, #0A1128 100%); color: #FFFFFF; text-align: center; padding: 80px 20px; }
    .about-banner h1 { font-size: 36px; font-weight: 800; margin-bottom: 15px; }
    .about-banner p { font-size: 16px; color: #BACAD6; max-width: 600px; margin: 0 auto; }

    
    .about-container { max-width: 900px; margin: 60px auto; padding: 0 20px; }
    .about-card { background: #FFFFFF; border-radius: 16px; padding: 40px; box-shadow: var(--card-shadow); border: 1px solid var(--border-color); margin-bottom: 40px; }
    .about-card h2 { font-size: 24px; font-weight: 700; color: var(--dark-bg); margin-bottom: 20px; display: flex; align-items: center; gap: 10px; }
    .about-card h2::before { content: ''; display: inline-block; width: 6px; height: 24px; background: var(--primary-color); border-radius: 3px; }
    .about-card p { font-size: 15px; color: var(--text-muted); line-height: 1.8; margin-bottom: 20px; }
    .about-card p:last-child { margin-bottom: 0; }

    
    .timeline { position: relative; padding-left: 30px; border-left: 2px solid var(--primary-color); margin-top: 30px; }
    .timeline-item { position: relative; margin-bottom: 30px; }
    .timeline-item::before { content: ''; position: absolute; left: -36px; top: 4px; width: 10px; height: 10px; border-radius: 50%; background: #FFFFFF; border: 3px solid var(--primary-color); }
    .timeline-year { font-weight: bold; color: var(--primary-color); font-size: 16px; margin-bottom: 5px; }
    .timeline-title { font-weight: 700; font-size: 15px; color: var(--dark-bg); margin-bottom: 5px; }
    .timeline-desc { font-size: 13px; color: var(--text-muted); }

    
    .site-footer { background: #0A1128; color: #A0AEC0; padding: 80px 20px 30px; border-top: 1px solid rgba(255, 255, 255, 0.1); }
    .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 span { color: #FFFFFF; }
    .footer-desc { font-size: 14px; line-height: 1.7; margin-top: 20px; color: #718096; }
    .footer-group h4 { font-size: 16px; font-weight: 700; color: #FFFFFF; margin-bottom: 25px; position: relative; }
    .footer-group h4::after { content: ''; display: block; width: 30px; height: 2px; background: var(--primary-color); margin-top: 8px; }
    .footer-links { list-style: none; }
    .footer-links li { margin-bottom: 12px; }
    .footer-links a { font-size: 14px; }
    .footer-links a:hover { color: #FFFFFF; padding-left: 5px; }
    .footer-info p { font-size: 14px; margin-bottom: 12px; display: flex; align-items: center; gap: 10px; }
    .footer-bottom { max-width: 1200px; margin: 0 auto; padding-top: 30px; border-top: 1px solid rgba(255, 255, 255, 0.05); text-align: center; font-size: 13px; color: #4A5568; }

    @media (max-width: 1024px) {
      .footer-container { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .desktop-nav { display: none; }
      .nav-toggle { display: flex; }
      .about-card { padding: 25px; }
      .footer-container { grid-template-columns: 1fr; gap: 30px; }
    }