Remove navbar to build LP in my website


I would like to create LP and hide/delete navbar + some elements of the footer (keep only legal part). The challenge that I am facing is that when I try do it, it’s automatically applied to all the pages of my website (which is not possible… I can’t remove navbar :)).

Can you please assist on this ?
Thank you very much

Here is my site Read-Only: Webflow - Excellence BS)