Customizing the title in Adonis Free

Hi! First of all: thank you for this wonderful theme! Now the question: How can I change the design of the displayed page title (changing font, make it italic, bold etc.)? I already tried hardcoding it into template parts but even after flushing the wordpress cache as well as restarting the webserver there was no change whatsoever. Any advice is very appreciated. Cheers Takayoshi