Product Landing Page feedback & pseudo-classes advice

Hi, I would like your opinion about this project.
Any tipp to make it better in some way?
Any suggestion, in particular for responsivness-media queries-html structure?

I would also ask you, what about pseudo-classes like :hover or :active in mobile navigation? Because I usually put some :hover effects, but I put them also in the Mobile configuration (because I use mobile first approach, and it’s kind automatic stuff for me to put a hover on some buttons and links).
Would be this a big problem? Should I use them only in desktop views? In this case, what kind of ‘effects’ could I use for Mobile navigation?