input--checkbox样式

   
   
   选项B

.my-checkbox-input{
  display: none;
}

.my-checkbox-input:checked+.my-checkbox-core {
  background-color: #26a2ff;
  border-color: #26a2ff;
}
.my-checkbox-core {
  display: inline-block;
  background-color: #fff;
  border-radius: 100%;
  border: 1px solid #ccc;
  position: relative;
  width: 16px;
  height: 16px;
  vertical-align: middle;
}

.my-checkbox-input:checked+.my-checkbox-core:after {
  border-color: #fff;
  -webkit-transform: rotate(45deg) scale(1);
  transform: rotate(45deg) scale(1);
}
.my-checkbox-core:after {
  border: 2px solid transparent;
  border-left: 0;
  border-top: 0;
  content: " ";
  top: 2px;
  left: 5px;
  position: absolute;
  width: 4px;
  height: 7px;
  -webkit-transform: rotate(45deg) scale(0);
  transform: rotate(45deg) scale(0);
  -webkit-transition: -webkit-transform .2s;
  transition: -webkit-transform .2s;
  transition: transform .2s;
  transition: transform .2s,-webkit-transform .2s;
}