How to change the icon position of wordpress visible edit shortcut in the customizer preview?

I am a new bee and I hope to use the visible edit shortcuts in the wordpress customizer preview. I have add the icon to one of my image block, but the icon default style is left:-30px and it is out of the window and cannot be seen, I hope to change it to left:10px; but I don’t know how to add this style to my theme, admin_enqueue_scripts seems not working. Could you give me some help?