title: Non transparent div inside a transparent div
body: <p>I am creating a webpage that have a transparent div.</p>
  
  <p>I want to add a non-transparent div inside that transparent div and I find that it is also transparent.</p>
  
  <p>I try to set the div inside to opacity:1 but it doesn't work.</p>
  
  <p>What should I do?</p>