:root {
            --primary: #005a87;
            --accent: #00d084;
            --dark: #000;
            --white: #fff;
            --gray: #69707D;
        }
        body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; line-height: 1.6; color: #333; margin: 0; }
        .container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
        header { border-bottom: 2px solid var(--primary); padding: 20px 0; display: flex; justify-content: space-between; align-items: center; }
        .logo-text { font-size: 24px; font-weight: bold; color: var(--primary); text-decoration: none; }
        nav a { margin-left: 15px; text-decoration: none; color: var(--gray); font-size: 14px; }
        .hero { padding: 40px 0; background: linear-gradient(135deg, #f4f4f4, #e0e9f0); text-align: center; border-radius: 8px; margin: 20px 0; }
        .main { display: grid; grid-template-columns: 1fr 300px; gap: 40px; margin-top: 40px; }
        @media (max-width: 768px) { .main { grid-template-columns: 1fr; } }
        .btn { background: var(--primary); color: white; padding: 10px 20px; border-radius: 4px; text-decoration: none; display: inline-block; font-weight: bold; }
        footer { margin-top: 60px; padding: 40px 0; border-top: 1px solid #ddd; text-align: center; font-size: 13px; color: var(--gray); }
        .sidebar-nav { list-style: none; padding: 0; }
        .sidebar-nav li { margin-bottom: 8px; }
        .sidebar-nav a { color: var(--primary); text-decoration: none; }
        .img-placeholder { width: 100%; height: 300px; background: #ddd; display: flex; align-items: center; justify-content: center; color: #999; border-radius: 8px; }