"Company culture" has always been an elusive thing for me. The more you try to be specific about it, the more the generalist corp-speak terms shimmer, flutter and dissolve into nothing. The only places where there was some "culture" (in my experience) were some of the tiny startups I worked at. Nobody talked it up, it just existed.

So my rule of thumb for that is, if they're talking about Corporate Culture, it means there is none.