On the website, you can choose between different designs for the blocks, depending on the atmosphere you want for your website, or your needs for a specific page. This article explains how to change the blocks' designs.
In order to change the design of one of your blocks on your website, simply go to > Website > website > Customize:
You will then arrive at the homepage of your website. If it is not a change on the homepage you're trying to make, go to > Pages to find the page where you want to do it.
On your left menu, select the block you wish to change the design:
Go to > Settings > Model to choose a design:
Click on > Save to update the changes.