body { font-family: 'Segoe UI', 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; width: 100%; background: #FF6B35; color: white; text-align: center; padding: 10px; }
        }
        .logo { font-size: 28px; font-weight: bold; color: #FF6B35; text-shadow: 1px 1px 2px #ccc; }
        nav a { margin: 0 15px; text-decoration: none; color: #FF6B35; }
        h1 { color: #FF6B35; border-bottom: 2px solid #f8c537; }
        h2 { color: #0072FF; margin-top: 30px; }
        h3 { color: #2E8B57; }
        .download-btn { background: #FF6B35; color: white; padding: 12px 25px; border-radius: 30px; display: inline-block; margin: 20px 0; }
        .login-btn { background: #0072FF; color: white; padding: 12px 25px; border-radius: 30px; display: inline-block; margin: 20px 10px; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        .tag { background: #f0f0f0; padding: 5px 10px; margin: 5px; display: inline-block; border-radius: 20px; }