<div class="box">

  <input type="checkbox" id="check01" name="選択肢" checked="">
  <label for="check01" class="checkBoxDesign">CHECK01</label>
  <input type="checkbox" id="check02">
  <label for="check02" class="checkBoxDesign">CHECK02</label>
  <input type="checkbox" id="check03">
  <label for="check03" class="checkBoxDesign">CHECK03</label>  
  
</div>
input[type=checkbox] {
    display: none;
}

.checkBoxDesign {
    box-sizing: border-box;
    cursor: pointer;
    display: inline-block;
    padding: 0.6rem 2rem;
    position: relative;
}

.checkBoxDesign::before {
    background: #fff;
    border: 1px solid #ccc;
    border-radius: 3px;
    content: '';
    display: block;
    height: 16px;
    left: 5px;
    margin-top: -8px;
    position: absolute;
    top: 50%;
    width: 16px;
}

.checkBoxDesign::after {
    border-right: 6px solid #ff7c1f;
    border-bottom: 3px solid #ff7c1f;
    content: '';
    display: block;
    height: 20px;
    left: 7px;
    margin-top: -16px;
    opacity: 0;
    position: absolute;
    top: 50%;
    transform: rotate(45deg);
    width: 9px;
}

input[type=checkbox]:checked + .checkBoxDesign::before {
    border-color: #ccc;
}

input[type=checkbox]:checked + .checkBoxDesign::after {
    opacity: 1;
}

External CSS

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External JavaScript

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