How to mark up such a unit?

Actually block like this :
5c9feb783b263470354541.png

the problem to make round translucent border.
I tried to do a gradient but does not work as they should .
March 19th 20 at 09:21
1 answer
March 19th 20 at 09:23
Solution
To impose such a right support conic-gradient https://caniuse.com/#feat=css-conic-gradients and mask-image https://caniuse.com/#feat=css-masks therefore it will be easier to make a picture.

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