Wanting to reduce the size of additional banners in index for Bryant template

Site URL: https://www.fiercepassions.com/my-offerings

Hello,

I am trying to redesign the look of my site. I used to have too many pages.  I decided to try to use a template with an index instead of having submenus.  I really like the look of it except:

I want the first banner of the index to be bigger than the other banners.  Currently it's a little bigger than I want, and the other banners I want considerably thinner. I tried looking through some old answered questions but the css doesn't appear to be working for me.

Here's the particular index I'm asking about (I'm doing a lot of experimentation, this is *not* the finished look of the site, so you'll see a lot of repeated page names)

https://www.fiercepassions.com/my-offerings