Where to change link color for the feature intro area (header type box) in Business Feature?

Hello, and thanks in advance for your time. For lifestylecrafting dot com, In theme Business Feature: I need to change the link text on the front page business feature intro area to white. I was able to do it under Appearance –> Custom Styling and, under the Design Styling area, changed “choose your link color” to #FFFFFF — The problem with that is that it changes some of my other links white, making them invisible against my already white background.

How can I change this button text link color without changing other site link colors? I’m willing to create a graphic button to put there, if that’s the only work-around, but I haven’t the slightest which file to edit (php, css, and in which folder… been searching and troubleshooting…:wink: or what code to look for in it. Please advise. I have a screenshot I could upload, but I don’t see where to add attachments to this question…