title: Unknow css change border's color
body: <p>Select checkbox auto changes border's color after open select checkbox.</p>
  
  <p>I can't find any class change select checkbox color on Developer tool,how to solve the problem?</p>
  
  <p><a href="https://i.stack.imgur.com/sBqUM.jpg" rel="nofollow noreferrer">demo</a></p>