自定义checkbox,radio样式

input[type=radio] {
  margin-right: 5px;
  cursor: pointer;
  font-size: 14px;
  width: 15px;
  height: 15px;
  position: relative;
  -webkit-appearance: none;
  appearance: none;
  outline: none;
  border: 0;
}
input[type=radio]:focus {
  outline: none;
}
input[type=radio]:after {
  position: absolute;
  width: 16px;
  height: 16px;
  top: 0;
  content: " ";
  color: #fff;
  display: inline-block;
  visibility: visible;
  padding: 0px 2px;
  border-radius: 50%;
  line-height: 16px;
  background:#FFFFFF;
  border:1px solid #DDDDDD;
}

input[type=radio]:checked:after {
　background:url('./checked.png') no-repeat center;

  background-size: cover;

  outline: none;
  border: 0;
}