If you need support from Yola please contact us via email@example.com or make use of our live chat service! We are working on a new approach to community-based support and during this transition period we are not adding any new threads to this forum. Many thanks to everyone who has participated over the years and we look forward to unveiling a new peer-to-peer support system soon!
Unfortunately you cannot achieve this by editing your Site CSS. I'm afraid it's not possible to add a link to the banner image. A workaround would be to use a Style template without a banner area, and add your banner in a Picture Widget at the top of the page. You could then add a link to this image.
However, your Page Heading is clickable, and will take people to your home page by default.
I'm sorry I cannot offer you a better solution for this at the moment.