Header + breadcrumbs

Hi there,

I want to set transparent header on every page of my website and keep at the same time the breadcrumb section under the header when I scroll down the page.
At the moment, when you’re at the top of the page, the breadcrumbs section is at the top of the page under the transparent header : I’d like to have transparent breadcrum section under the header/main nag section. And when you scroll down the header/main nav becomes white, which is fine, but the breadcrumbs disappear which is something I do not want. Can you help ? Thanks a lot