ul.questionbox {
  width: 96%;
  margin: 0 auto;
}

ul.questionbox li {
  padding: 20px 20px 10px 90px;
  margin: 20px 0;
  border: 1px solid #0fa675;
  border-radius: 20px;
  background-size: 72px 66px;
  text-align: left;
  background: url("../images/question/icon_q.png") no-repeat left top;
  background-size: auto;
  background-size: 72px 66px;
  background-color: #fff;
}
ul.questionbox li .question {
  font-weight: bold;
}
ul.questionbox li .answer{
  background: url("../images/question/icon_a.png") no-repeat left top;
  background-size: auto;
  background-size: 72px 66px;
  padding: 18px 0 0 70px ;
  margin: 10px 0 0 0;
}
@media screen and (max-width: 600px) { 
  
  ul.questionbox li{
    padding: 0;
  }
  ul.questionbox li .question {
    padding: 20px 20px 10px 90px;  
  }
  ul.questionbox li .answer{
    padding: 5px 0 0 55px;
    margin: 10px 0 8px 0;
  }
}