Why is the display of the site from the Facebook application not the same as on the mobile version in the browser?

Question

css

Hi kiddo.
The site is displayed very strangely when opened from the Facebook application.

Although it should be like this Mobile version of the site

itself (displayed when width < 400, otherwise it redirects to the desktop version) Why does the site behave this way and how can I fix it?

Answer 1

Most likely, the links processed from the Facebook application use an old version of the web browser (like chrome there), and, accordingly, some CSS styles fly off.

Answer 2

I think because <meta name="viewport" content="width=1200">it should be like this

<meta name="viewport" content="width=device-width">