HTML

<form>
<label>
    <input type="checkbox" name="" value="0" class="checkbox">
    <span class="checkbox-icon"></span>
    チェックボックス
</label>
</form>

CSS

/*-------------------------------------------------
チェックボックス
----------------------------------------------- */
label input[type="checkbox"]{
  display: none;
}
label{
  cursor: pointer;
  color: #333333;
  font-weight: normal;
  letter-spacing: 0;
  display: inline-block;
  position: relative;
  margin-right: 20px;
}
label .checkbox-icon:before{
  content:'';
  border: 1px solid #ddd;
  width: 20px;
  height: 20px;
  margin-right: 5px;
  display: inline-block;
  vertical-align: middle;
  border-radius: 3px;
  -webkit-transition: all 800ms cubic-bezier(1, 0, 0, 1);
  -moz-transition: all 800ms cubic-bezier(1, 0, 0, 1);
  -o-transition: all 800ms cubic-bezier(1, 0, 0, 1);
  transition: all 800ms cubic-bezier(1, 0, 0, 1);
  -webkit-transition-timing-function: cubic-bezier(1, 0, 0, 1);
  -moz-transition-timing-function: cubic-bezier(1, 0, 0, 1);
  -o-transition-timing-function: cubic-bezier(1, 0, 0, 1);
  transition-timing-function: cubic-bezier(1, 0, 0, 1);
  background: #ffffff;
}
label input[type="checkbox"]:checked + .checkbox-icon:before{
  opacity: 0;
  background: #eee;
  border-color: #eee;
  transform:scale(2);
}
label .checkbox-icon:after{
  content:'';
  opacity: 0;
  position: absolute;
  left: 8px;
  top: 0px;
  width:8px;
  height: 16px;
  border-right: 2px solid #ddd;
  border-bottom: 2px solid #ddd;
  transform:rotate(-200deg);
  -webkit-transition: all 400ms cubic-bezier(1, 0, 0, 1);
  -moz-transition: all 400ms cubic-bezier(1, 0, 0, 1);
  -o-transition: all 400ms cubic-bezier(1, 0, 0, 1);
  transition: all 400ms cubic-bezier(1, 0, 0, 1);
  -webkit-transition-timing-function: cubic-bezier(1, 0, 0, 1);
  -moz-transition-timing-function: cubic-bezier(1, 0, 0, 1);
  -o-transition-timing-function: cubic-bezier(1, 0, 0, 1);
  transition-timing-function: cubic-bezier(1, 0, 0, 1);
}
label input[type="checkbox"]:checked + .checkbox-icon:after{
  opacity: 1;
  position: absolute;
  left: 8px;
  top: 0px;
  width:8px;
  height: 16px;
  border-right: 2px solid #e93653;
  border-bottom: 2px solid #e93653;
  transform:rotate(40deg);
}