body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1 { color: #ff6b35; text-align: center; margin-bottom: 30px; }
        h2 { color: #0077b6; border-bottom: 2px solid #f8f9fa; padding-bottom: 10px; }
        h3 { color: #4895ef; }
        .logo { font-size: 2.5em; font-weight: bold; text-shadow: 2px 2px 4px rgba(0,0,0,0.1); margin: 20px 0; }
        .nav { background: #003566; padding: 15px; display: flex; justify-content: space-between; align-items: center; }
        .nav a { color: white; text-decoration: none; margin: 0 10px; }
        .mobile-nav-btn { display: none; background: #ff6b35; color: white; border: none; padding: 10px; cursor: pointer; }
        .content { margin-top: 20px; }
        .download-btn, .login-btn { display: inline-block; padding: 12px 25px; background: #ff6b35; color: white; text-decoration: none; border-radius: 5px; margin: 15px 0; }
        .feature-box { background: #f8f9fa; padding: 20px; margin: 20px 0; border-radius: 8px; }
        img { max-width: 100%; height: auto; display: block; margin: 20px auto; }
        footer { background: #003566; color: white; padding: 20px; text-align: center; margin-top: 40px; }
        @media (max-width: 768px) {
            .nav { flex-direction: column; }
            .mobile-nav-btn { display: block; }
            .nav-links { display: none; }
            .nav-links.active { display: flex; flex-direction: column; }
        }