body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1 { color: #FF4500; text-align: center; margin-bottom: 30px; }
        h2 { color: #008000; border-bottom: 2px solid #FF4500; padding-bottom: 5px; margin-top: 40px; }
        h3 { color: #4169E1; }
        .download-btn { background: #FF4500; color: white; padding: 12px 25px; border-radius: 5px; text-decoration: none; display: inline-block; margin: 15px 0; }
        .login-btn { background: #008000; color: white; padding: 12px 25px; border-radius: 5px; text-decoration: none; display: inline-block; margin: 15px 10px; }
        .nav-btn { display: none; }
        @media (max-width: 768px) {
            .nav-links { display: none; }
            .nav-btn { display: block; background: #FF4500; color: white; padding: 10px; border: none; cursor: pointer; }
            .active { display: block; }
        }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        .logo { font-size: 28px; font-weight: bold; color: #FF4500; text-decoration: none; }
        .footer { margin-top: 50px; padding-top: 20px; border-top: 1px solid #eee; }