Embedded pages

I’d like to save embedded code in pages. But unfortunately this cannot be sufficient enough.
In the example link cited the code in the page only appears almost along the text without any styles.

Sorry for lacking in examples but someday ago I was saving a page link with the plugin but it couldn’t retrieve the code by an embedded github reference. Even the link for accessing the code hyperlink is not showed.

So, in resume I request to efficient save pages along embedded codes (for example) and its styles.

The page I need help with: [log in to see the link]