<div class="form-group row py-4 mt-4 bg-body-light">
    <label class="col-sm-2"></label>
    <div class="col-sm-8">
        <button type="submit" class="btn btn-lg btn-primary px-5 py-2" data-loading-text="提交中，请稍候..."><i class="fa fa-fw fa-check"></i> 提 交</button>
    </div>
</div>