Formatting "Featured Content Headline Text" & "Featured Content Subheadline Text

Hi there, This must have been asked before, still can't find anything in the forum: I need some additinal CSS for influencing size and maybe fonts of - Featured Content Headline Text - Featured Content Subheadline Text Bet you know something along the line? :) Thanks for adreesing the issue and best regards Ulrich for https://www.stiftung-meeresschutz.org/