Carousel header text size

Hey community, 

I am struggling to change the size of the carousel header text. Tried to find the solution here on the forum, but didn't succeed.

I would like to make the header bold and bigger.

Thanks in advance :)

Can you share link to this page?

Sure, https://www.hrselts.ee/meie-tegemised

Just in case, I use these carousels a lot, and I'd like to change that globally if it's possible.

Thanks in advance, @tuanphan :)

That worked, thank's a lot, @tuanphan :)