The same request Phone response: Computer response: How the two changed to be consistent

The same request Phone response: When accessed from a mobile phone, the response contains an HTML page with embedded JavaScript code. This JavaScript code appears to use AES to perform some encryption or decryption. The script sets a cookie and then redirects the browser to the same URL with some additional parameters (i=1). Computer response: When accessed from a personal computer, the response is a JSON object containing various data fields, including a msg field with a value of login successful (login successful) and some user information such as username, password, name, QQ, VIP status, etc. There is also a viptime field indicating the VIP expiration date. How the two changed to be consistent