I would like to add a black outline to text

I would like to add an outline to my text on the Index pages to help the show up a little better. I have tried using other CSS code that I have found in the forums without success. Could anyone suggest anything that would help?

The site is https://coral-magnolia-rgj9.squarespace.com and the password to view is FBHSsite. The template is Fulton

Any help would be greatly appreciated.

Thank you in advance

@FindersBeepers You mean " Feast Your Eyeballs",...?

Yes and the Dress like a Beeper one

@FindersBeepers Add to Home > Design > Custom CSS

.index-section.page h2:last-child {
   outline: 1px solid #ff0000;
}