Remove the Background from product widget

I need to remove the White background. I want to make a specific page for products something like aliexpress

I can get it in chrome css But when i add the css it’s not appearing in the page
Note: I deactivated the Cache plugin while i do this test

I need to make like this page

In my site I want to do for this elementor widgets.

I can do this in Chrome see here

And Also this border radius i need to apply on the product block

I can not get it to work

I updated like this in the Backend may be i’m wrong

How can i get this using Custom CSS How to add CSS code properly

Thanks and Regards
Rafilathif

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