Floating Bar Field and Passing Data To 2nd Page

Hello. Looking for a bit of guidance on 2 functions I have seen for Gravity.

On wordpress site, using Divi theme, I am trying to accomplish the floating bar effect with a gravity for (address field) as seen on the home page of doughopkins.com I am trying to have the address bar stick to the top as scroll passes the fold.

In addition, passing the address field on home page over to a more complete contact form on a contact us page. Address being one of the fields of course.

Any here here would he greatly appreciated.

Thank you in advance.