:root {
            --primary: #1D7BFF;
            --primary-accent: rgb(189,147,249);
            --bg-glacier: #F4F8FC;
            --silver: #E2E8F0;
            --ink-deep: #0B0F19;
            --ink-light: #475569;
            --white: #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, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; background-color: var(--bg-glacier); color: var(--ink-deep); line-height: 1.6; }
        a { color: inherit; text-decoration: none; }

        
        .site-header { position: sticky; top: 0; z-index: 1000; background: rgba(255, 255, 255, 0.9); backdrop-filter: blur(12px); border-bottom: 1px solid var(--silver); height: 70px; }
        .header-container { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; height: 100%; padding: 0 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: 18px; font-weight: 800; color: var(--ink-deep); }
        .desktop-nav { display: flex; align-items: center; gap: 32px; }
        .desktop-nav a { font-size: 15px; font-weight: 500; color: var(--ink-light); }
        .desktop-nav a:hover { color: var(--primary); }
        .mobile-trigger { display: none; background: none; border: none; cursor: pointer; }
        .mobile-trigger span { display: block; width: 24px; height: 2px; background: var(--ink-deep); margin: 5px 0; }

        
        .drawer-mask { position: fixed; inset: 0; background: rgba(11, 15, 25, 0.5); backdrop-filter: blur(4px); z-index: 2000; opacity: 0; pointer-events: none; transition: var(--transition); }
        .drawer-mask.active { opacity: 1; pointer-events: auto; }
        .mobile-drawer { position: fixed; top: 0; left: -320px; width: 300px; height: 100%; background: var(--white); z-index: 2001; box-shadow: 10px 0 30px rgba(0,0,0,0.1); transition: var(--transition); display: flex; flex-direction: column; }
        .mobile-drawer.active { left: 0; }
        .drawer-header { padding: 20px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--silver); }
        .drawer-close { background: none; border: none; font-size: 24px; cursor: pointer; }
        .drawer-nav { padding: 20px 0; overflow-y: auto; flex: 1; }
        .drawer-nav a { display: block; padding: 14px 24px; font-size: 16px; font-weight: 500; color: var(--ink-light); }

        .about-banner { background: linear-gradient(135deg, #1D7BFF 0%, #0B0F19 100%); color: var(--white); padding: 60px 20px; text-align: center; }
        .about-banner h1 { font-size: 36px; font-weight: 800; margin-bottom: 10px; }
        
        .container { max-width: 900px; margin: 50px auto; padding: 0 20px; }
        .about-section { background: var(--white); border: 1px solid var(--silver); border-radius: 12px; padding: 40px; margin-bottom: 30px; }
        .about-section h2 { font-size: 24px; font-weight: 700; color: var(--ink-deep); margin-bottom: 20px; border-left: 4px solid var(--primary); padding-left: 12px; }
        .about-section p { font-size: 16px; color: var(--ink-light); line-height: 1.8; margin-bottom: 15px; }

        .stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 30px; text-align: center; }
        .stat-item { background: var(--bg-glacier); padding: 20px; border-radius: 8px; border: 1px solid var(--silver); }
        .stat-item strong { display: block; font-size: 28px; color: var(--primary); margin-bottom: 5px; }
        .stat-item span { font-size: 14px; color: var(--ink-light); }

        
        .site-footer { background: #0B0F19; color: #94A3B8; padding: 70px 20px 30px; border-top: 1px solid rgba(255,255,255,0.1); }
        .footer-grid { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: 40px; margin-bottom: 50px; }
        .footer-brand .logo span { color: var(--white); }
        .footer-desc { margin-top: 15px; font-size: 14px; }
        .footer-title { font-size: 16px; font-weight: 700; color: var(--white); margin-bottom: 20px; }
        .footer-links { list-style: none; }
        .footer-links li { margin-bottom: 12px; }
        .footer-links a { font-size: 14px; transition: var(--transition); }
        .footer-links a:hover { color: var(--white); }
        .footer-bottom { max-width: 1200px; margin: 0 auto; border-top: 1px solid rgba(255,255,255,0.1); padding-top: 30px; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 20px; font-size: 13px; }

        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .mobile-trigger { display: block; }
            .stats-grid { grid-template-columns: 1fr; }
        }