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: #2C75FF; border-bottom: 2px solid #FFD700; padding-bottom: 5px; }
        h3 { color: #4CAF50; }
        .logo { font-size: 28px; font-weight: bold; color: #FF4500; text-align: center; margin: 20px 0; }
        .download-btn { background: #4CAF50; color: white; padding: 12px 25px; text-align: center; margin: 20px 0; display: inline-block; border-radius: 5px; }
        .login-btn { background: #2196F3; color: white; padding: 12px 25px; text-align: center; margin: 20px 0; display: inline-block; border-radius: 5px; }
        nav { background: #333; overflow: hidden; }
        nav a { float: left; display: block; color: white; text-align: center; padding: 14px 16px; text-decoration: none; }
        .mobile-menu { display: none; background: #333; color: white; padding: 10px; text-align: center; cursor: pointer; }
        @media (max-width: 768px) {
            nav a:not(:first-child) { display: none; }
            nav a.mobile-menu { display: block; float: right; }
            .responsive { display: block; width: 100%; }
            .responsive a { float: none; display: block; text-align: left; }
        }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        .tag { background: #f1f1f1; padding: 5px 10px; border-radius: 3px; margin: 5px; display: inline-block; }
        footer { background: #333; color: white; padding: 20px; text-align: center; margin-top: 40px; }