Merged Header

Hi
on the home page I have a transparent header and I want to merge with the underlying slider made with elementor.
I also set up a stiky menu with a white background.
The stiky menu works but the merge header does not.
I've tried several times and checked all the settings but still can't do it.
There seems to be a mistake on my part, can you help me?
Below I report a screenschot of the various settings.
This is the link of the site http://www.webfiliboli.com/