border-radius背景色超出圆角问题解决

span{
    display: block;
    background: #f4f4f4;
    color: #333;
    font-size: 14px;
    -webkit-border-radius: 20px;
    border-radius: 20px;
    text-align: center;
    height: 32px;
    line-height: 32px;
    margin-right: 10px;
    padding: 0 10px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    width: 4em;
}
.span1{
    /*
        在 M7007 下背景色会超出圆角
        border: 1px solid #ededed;
    */
    border: 1px solid #ededed;
}
.span2{
    border: none;
    box-shadow: 0 0 0 1px #ededed;
}

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<span class="span1">一些文案</span>
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<span class="span2">一些文案</span>