And

For ME it is fully responsive. Theme: Kadence

@verek,

all is ok, this is the main difficulty of using side oriented background images. In this case you can change the background mode from "cover" to "contain" for small mobile devices and all will be ok, but we don't do that because it's ok to show the "support" word only.

@media screen and (max-width:480px) {
   #wpforo #wpforo-wrap .wpforo-category{background-size: contain !important; background-repeat: no-repeat;}
}