<div class="cp_ipcheck07">
  <ul>
    <li class="list_item">
    <label><input type="checkbox" class="option-input07" checked />ネコ</label>
    </li>
    <li class="list_item">
    <label><input type="checkbox" class="option-input07" />イヌ</label>
    </li>
    <li class="list_item">
    <label><input type="checkbox" class="option-input07" />ウサギ</label>
    </li>
  </ul>
</div>

.cp_ipcheck07 {
  margin: 2em auto;
}
.cp_ipcheck07 ul {
  list-style: none;
}
.cp_ipcheck07 .list_item {
  margin-bottom: 10px;
}
/*ラベルの設定*/
.cp_ipcheck07 label {
  position: relative;
  display: flex;
  align-items: center;
  cursor: pointer;
}
/*チェックボックスの設定*/
.cp_ipcheck07 .option-input07 {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 22px;
  /*デフォルト値を無効に*/
  border: none;
  outline: none;
  appearance: none;
}
.cp_ipcheck07 .option-input07:before,
.cp_ipcheck07 .option-input07:after {
  position: absolute;
  content: '';
  width: 20px;
  height: 20px;
}
.cp_ipcheck07 .option-input07:before {
  background: #ffffff;
}
.cp_ipcheck07 .option-input07:after {
  outline: 2px solid #da3c41;
  transition: all 0.3s ease-in-out;
}
/*checked時の設定*/
.cp_ipcheck07 .option-input07:checked:after {
  background: #da3c41;
  transform: rotateY(180deg);
}