I think it's a combination of: * the dark top bar; * the blue gradient buttons; * it's primarily a 1-column layout with a 3-column segment ('buy into being s

I think it's a combination of: * the dark top bar; * the blue gradient buttons; * it's primarily a 1-column layout with a 3-column segment ('buy into being safer' &c.) None of those Bootstrap-specific, of course, but they are increasingly common as a result of it.