body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        .mobile-nav { display: none; }
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .mobile-nav { display: block; position: fixed; bottom: 0; left: 0; right: 0; background: #ff9900; padding: 10px; text-align: center; }
            .nav-toggle { background: #fff; border: none; padding: 8px 15px; cursor: pointer; }
        }
        h1 { color: #ff6600; border-bottom: 3px solid #ff9900; padding-bottom: 10px; }
        h2 { color: #ff9900; margin-top: 30px; }
        h3 { color: #ffb366; }
        .logo { font-size: 2.5em; font-weight: bold; color: #ff6600; text-shadow: 2px 2px 4px rgba(0,0,0,0.2); }
        .download-btn { background: #4CAF50; color: white; padding: 12px 25px; text-decoration: none; border-radius: 5px; margin: 15px 0; display: inline-block; }
        .login-btn { background: #2196F3; color: white; padding: 12px 25px; text-decoration: none; border-radius: 5px; margin: 15px 0; display: inline-block; }
        .image-container { text-align: center; margin: 25px 0; }
        img { max-width: 100%; height: auto; }
        .tag { background: #f1f1f1; padding: 5px 10px; border-radius: 15px; margin: 5px; display: inline-block; }
        .footer { margin-top: 50px; padding-top: 20px; border-top: 1px solid #eee; }