How to make rounded corner of the background card of a Service section

I would like to make the corners of the background cards of my service section rounded.
how would i do this?

What i have now can be seen on URL https://www.revenuescout.io/#sales-tech

i found out so this is solved.

the CSS code is 

.list-item[data-is-card-enabled="true"] { border-radius: 25px; }