Techup Service Panel: How to Limit how much content it pulls in

I need to limit the amount of content that gets pulled into each of the three service panels on my home page.

I have three service panels on the home page. When you click on the more button at the bottom of each panel it pulls to a new (three separate pages) page related to the panel header. I had to delete a lot of additional content of each of these specific pages because I couldn’t limit how much text was being pulled into each panel. Meaning that I only wanted each panel to pull in essentially an excerpt of content from the page it was linking to.

The page I need help with: [log in to see the link]