弹性盒子 （每行固定数量，列数不定）

<div class="row wrapper">
    <label class="action " intention="1" tracking="23">推荐</label>
    <label class="action " intention="2" tracking="23">跟进</label>
    <label class="action " intention="3" tracking="23">忽略</label>
    <label class="action " intention="5" tracking="23">测试</label>
</div>

.wrapper {
     100%;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-gap: .5rem;
}