SOURCE

<div class="list">
        <h3>CSS Only Item Check List</h3>
        <label>
            <input type="checkbox">
            <i></i>
            <span>Love is more than a word</span>
        </label>
         <label>
            <input type="checkbox">
            <i></i>
            <span>it says so much</span>
        </label>
         <label>
            <input type="checkbox">
            <i></i>
            <span>When I see these four letters</span>
        </label>
         <label>
            <input type="checkbox">
            <i></i>
            <span>I almost feel your touch</span>
        </label>
         <label>
            <input type="checkbox">
            <i></i>
            <span>This is only happened since</span>
        </label>
         <label>
            <input type="checkbox">
            <i></i>
            <span>I haven't got a clue</span>
        </label>
</div>

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: #001925;
}

.list {
    padding: 15px 75px 10px 30px;
    position: relative;
    background: #042b3e;
    border-top: 50px solid #03a9f4;
}
.list h3 {
    color: #fff;
    font-size: 30px;
    padding: 10px 0;
    margin-left: 10px;
    display: inline-block;
    border-bottom: 4px solid #fff;
}

.list label {
    position: relative;
    display: block;
    margin: 30px 0;
    color: #fff;
    font-size: 24px;
    cursor: pointer;
}

.list input[type="checkbox"] { 
    /* 主流浏览器不支持Firefox 支持替代的 -moz-appearance 属性。Safari 和 Chrome 支持替代的 -webkit-appearance 属性 */
    -webkit-appearance: none;
}

.list i {
    position: absolute;
    top: 2px;
    display: inline-block;
    width: 25px;
    height: 25px;
    border: 2px solid #fff;
}

.list input[type="checkbox"]:checked ~ i{
    top: 1px;
    border-top: none;
    border-right: none;
    width: 25px;
    height: 15px;
    transform: rotate(-45deg);
}
.list span {
    position: relative;
    left: 40px;
    transition: .5s;
}

.list span::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    height: 1px;
    background:#fff;

    transform: translateY(-50%) scale(0);
    transform-origin: right;
    transition: transform .5s;
}

.list input[type='checkbox']:checked ~ span::before {
    transform: translateY(-50%) scale(1);
    transform-origin: left;
    transition: transform .5s;
}

.list input[type='checkbox']{
    color: #154e6b;
}