Custom CSS

Hello Friends, When Use Clicks To any categories and there is no Nothin in it, There is Categories : and after this txt Selected categories, so categorie title is not changed with Use Any Font title can you tell me CSS Code to change with custom code? please?

I Want to change Word : ?????????: <– this was not changed By Plugin . Thanks .

Here is video For Demonstratio : https://youtu.be/S8pJks8JHGE

The page I need help with: [log in to see the link]