Hello @HOSEIN,
after reviewing this report, I come to the conclusion that it’s the same issue as you already reported it here for alpha:
The selector does not work on the frontend, because the structure is a bit different. And the “width” does not work (even in the builder), because the <span> element you are targeting, is not display:block or similar.
But, as the issue is basically the same as the one in the other topic, I’ll close this one and mark it as duplicate.
Thanks for understanding,
Matej