Hi @RyanDejaegher and @derricksrandomviews yes that's approximately what I'm looking for, but I want the vertical lines to extend to meet the full-width horizontal lines at the top and bottom of the row of cards, and no outer border visible on the left and right of the row.
The 'Fresh Produce' component here is a perfect example: https://sometimesalways.com.au/
I tried both the suggested solutions and can't figure out how to extend the length of the line beyond the length of the card.
Thanks for the help so far!