unable to change font size of text that uses wp-cufon

i am using wp-cufon on my site.
https://mamoo-kids.com

i was able to change font size for nav menu in custom css (using storefront elegant theme), but i just cannot change font size for the widget titles at the bottom. (about us, recent post, news and info, join our mailing list in orange) they are way too big.

i tried to change H1 and H2 so many times, but nothing worked. what am i missing?

thanks