SOURCE

<div class="card">
    
    <div class="card__content">
        <label for="css"><input type="checkbox" name="css" id="css" />CSS</label>
        <label for="html"><input type="checkbox" name="html" id="html" checked />HTML</label>
        <label for="js"><input type="checkbox" name="js" id="js" />JavaScript</label>
        <label for="vue"><input type="checkbox" name="vue" id="vue" checked />Vue</label>
        <label for="react"><input type="checkbox" name="react" id="react" />React</label>
        <label for="php"><input type="checkbox" name="php" id="php" />PHP</label>
        <label for="java"><input type="checkbox" name="java" id="java" />Java</label>
        <label for="python"><input type="checkbox" name="python" id="python" />Python</label>
    </div>
</div>

/* 自定义复选框 UI 样式 */
input[type="checkbox"] {
    height: 1px;
    overflow: hidden;
    width: 1px;
    position: absolute;
}

label {
    display: flex;
    align-items: center;
    gap: 0.5em;
    padding: 0.5em;
    border: 1px solid transparent;
    border-radius: var(--radius-tl, 0) var(--radius-tr, 0) var(--radius-br, 0) var(--radius-bl, 0);
}

label::before {
    content: "";
    display: inline-flex;
    justify-content: center;
    align-items: center;
    border-radius: 4px;
    border: 1px solid #c5c5c5;
    background: #fff;
    color: #c5c5c5;
    width: 24px;
    aspect-ratio: 1;
    transition: all 0.2s ease;
}

label:has(:checked) {
    color: #9739e8;
}

label:has(:checked)::before {
    content: "✔";
    border-color: #9739e8;
    background-color: #9739e8;
    color: #fff;
    font-size: 0.75em;
}

/* 有状态的多范围选择组 */

/* 范围组内的第一个选中项或单个选中项的顶部样式 */
label:has(:checked):not(label:has(:checked) + label) {
   border-radius: 5px;
    border-block-start-color: black;
}

/* 范围组内最后一次选中的项或单个选中项的底部样式 */
label:has(:checked):not(label:has(+ label :checked)) {
    border-block-end-color: black;
    box-shadow: 0 4px 3px -2px rgba(0, 0, 0, 0.35);
}

/* 范围组内所有项的样式 */
label:has(:checked):has(~ label :checked),
label:has(:checked):not(label:has(+ label :checked)) {
    border-inline-color: black;
    background-color: palegreen;
}