DedeV6/src/templets/default/widget_qrcode.htm

<div class="card ddcard pt-3">
    <div class="card-header">
        <div class="row">
            <div class="col-12 caption"><span>二维码</span></div>
        </div>
    </div>
    <div>
        {dede:qrcode/}
    </div>
</div>
<!-- /.ddcard -->