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CMS elements to hide/show on click, based on current element HELP!

Greetings everyone!
I’m just finishing this project and I ran into a problem. So my colleague basically wants (scroll to Meet our TEAM section) to open up a box with more info of a person that you clicked on, in the same page (I’ll upload a picture to showcase how it should look, and it can also be seen in the projects, it’s just hidden). Maybe my thought process was utterly wrong here and I don’t need 2 separate CMS’s to be linked, but I also tried putting everything inside of one and it doesn’t seem to work for me. Does anyone have a clue how to solve this?

Here is my link: