Bootstrap Styling

Hello... I am looking for some direction on how to style some ancillary pages for my Elegant template. I have tried some sample code from a some different Bootstrap sites, copy and pasted code and copies CSS into custom css - but styling doesn't apply? Am I doing this wrong? Perhaps there is another style sheet I need to use? I don't know.

Do you have a reference page with example page styles for a Jumbotron, Header, layout configuration that works well with Elegant template?

Thansk in advance for your help!

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