amp html - is there a way to customize amp story attachment icon using css selector?

Question

i would like to know is there a way to use custom css to change color of .i-amphtml-story-page-open-attachment-icon:after like shown in the pic

using css selector

[class*="amphtml-story-page-open-attachment-icon"]:after {
  background: blue;
}

Answer 1

等待大神答复