<label class="radio-v2">
　　<input type="radio" name="c">
　　<span></span>自动弹出
</label>
<label class="radio-v2">
　　<input type="radio" name="c">
　　<span></span>不自动弹出
</label>
<label class="radio-v2">
　　<input type="radio" name="c" disabled>
　　<span></span>禁用
</label>

.radio-v2 {
  margin-right: 30px;
  font-weight: normal;
}
.radio-v2 input {
  opacity: 0;
  z-index: 2;
}
.radio-v2 span {
  position: relative;
  display: inline-block;
  vertical-align: top;
  margin-left: -20px;
  width: 20px;
  height: 20px;
  border-radius: 500px;
  border: 1px solid #AAB8D4;
  margin-right: 5px;
  text-align: center;
}
.radio-v2:hover span {
  border-color: #4A5FE2;
}
.radio-v2 input[type=radio]:checked + span:before {
  position: absolute;
  content: "";
  width: 12px;
  height: 12px;
  top: 50%;
  left: 50%;
  margin-top: -6px;
  margin-left: -6px;
  border-radius: 500px;
  opacity: 1;
  transition: color 0.3s ease-out;
  background-color: #4A5FE2;
}
.radio-v2 input[type=radio]:checked + span {
  border-color: #4A5FE2;
}
.radio-v2 input[type=radio]:disabled + span {
  border-color: rgba(162, 162, 162, 0.12) !important;
  cursor: not-allowed;
}
.radio-v2 input[type=radio]:disabled + span:before {
  background-color: rgba(162, 162, 162, 0.12);
}