Navigation bar issues

I’m trying to incorporate navigation from a website into a blog. This is a redesign for a blog, and they are using javascript for their menu dropdown. I’m having the most difficult time adding it into the site. When I tried adding it the exact way as showing on the original site (importing stylesheets, adding .js,) it doesnt show correctly.

Any help would be greatly appreciated.

Need main nav to look like this (top right-hand corner): https://forio.com/resources/ (using wordpress 2.0.1)

Close as I can get it currently is this: https://jenmatos.com/forio2/