Change H2 to H1 in full screen slider

Hello together,
I want to change the headline in the fullscreen slider from a H1 to a H2. The Enfold development team has provided us with a solution that allows us to individually define the type of caption. https://kriesi.at/support/topic/change-h2-to-h1-in-full-screen-slider-via-php-seems-not-to-work-as-it-did-once/#post-1256065 A great solution! But in my case the website looks after changing the H2 to a H1 awful and not responsive anymore. You can find a screenshot in the private content below.

Because I haven’t found a solution in the forum and nobody is giving me a answer to a other tread of mine I am opening this new tread.

Maybe someone can help me with a suitable Quick-CSS or a solution in the functions.php area.
Thanks in advance.