body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        header { background: #1a3e72; color: white; padding: 20px; text-align: center; position: relative; }
        .logo { font-size: 2.5em; font-weight: bold; text-transform: uppercase; }
        nav { display: flex; justify-content: center; gap: 20px; margin-top: 15px; }
        nav a { color: white; text-decoration: none; }
        .mobile-menu { display: none; position: absolute; top: 20px; right: 20px; }
        h1 { color: #1a3e72; border-bottom: 3px solid #f4b400; padding-bottom: 10px; }
        h2 { color: #2c5aa0; margin-top: 30px; }
        h3 { color: #4d85bd; }
        .download-btn, .login-btn { display: inline-block; padding: 12px 25px; background: #f4b400; color: #1a3e72; font-weight: bold; border-radius: 5px; margin: 15px 0; text-decoration: none; }
        .feature-box { background: #f0f8ff; padding: 20px; border-radius: 8px; margin: 20px 0; }
        img { max-width: 100%; height: auto; display: block; margin: 20px auto; border-radius: 8px; }
        footer { background: #1a3e72; color: white; text-align: center; padding: 20px; margin-top: 40px; }
        @media (max-width: 768px) {
            nav { display: none; flex-direction: column; }
            .mobile-menu { display: block; }
            .logo { font-size: 2em; }
        }