Internal links: How to remove the "border" that appears around linked section

Hi!
I'm designing my company page (wordpress), and I have encountered a problem.
I've added internal links to a page, where different link at the top of the page links to different sections further down that same page, and it all works perfectly. Except for the fact that an ugly gray border appears round the linked section, when you press the link. It's obviously meant to be helpful - to show the visitor exactly what section they're supposed to look at. But to me this ruins the entire experience and just looks weird.

I've given the different sections names with the #-tag, and the linking works fine. So the only problem is that i don't want the border to appear. I'm no coding-expert in any way, so if there's a simple solution to this - I still might need it explained step by step. I've googled this for days, and I might use the wrong terms, but I hope someone understands my problem and knows how to solve it. Thank you!