body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        .logo { font-size: 28px; font-weight: bold; color: #ff6b35; text-shadow: 1px 1px 2px #ccc; }
        nav { background: #f8f8f8; padding: 10px; margin-bottom: 20px; }
        nav a { margin: 0 15px; text-decoration: none; color: #333; }
        h1 { color: #ff6b35; border-bottom: 2px solid #eee; padding-bottom: 10px; }
        h2 { color: #4a90e2; margin-top: 30px; }
        h3 { color: #555; }
        .download-btn, .login-btn { display: inline-block; background: #4CAF50; color: white; padding: 10px 20px; margin: 10px 0; text-decoration: none; border-radius: 5px; }
        .login-btn { background: #2196F3; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        .mobile-nav { display: none; }
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .mobile-nav { display: block; background: #333; color: white; padding: 10px; text-align: center; }
            .mobile-nav button { background: none; border: none; color: white; font-size: 16px; }
        }
        .tags { margin: 20px 0; }
        .tags a { background: #eee; padding: 5px 10px; margin: 5px; text-decoration: none; color: #333; border-radius: 3px; }
        footer { margin-top: 40px; padding: 20px; background: #f8f8f8; border-top: 1px solid #eee; }
        .copyright { margin-top: 20px; font-size: 12px; color: #777; }