Need help centering a form on a guided landing page

Hi!

I've been racking my brain all day trying to sort this out. I'm using Guided Template 10-E​, where (as you can see) there's a very nicely centre-aligned form in the hero section.

Unfortunately when I assign a form to this section, it aligns it to the left of the page (see here​).

I've tried the advice already on this forum on this topic (here​ and here​) with no luck.

Can anyone point me in the right direction?

Thanks!