fieldset可以实现在虚线框中写文字

例子：

<fieldset class="layui-form-item" style="border: dashed 1px #f5f5f5;">
                            <legend style="text-align: center;">基础数据</legend>
                            <div style=" 98%;height: 25px; line-height: 25px;margin: 0 auto; border: solid 1px #f5f5f5;">日期</div>
                            <div style=" 98%;height: 25px; line-height: 25px;margin: 2px auto 2px; border: solid 1px #f5f5f5;">访客数</div>
                            <div style=" 98%;height: 25px; line-height: 25px;margin: 2px auto 2px; border: solid 1px #f5f5f5;">访客数</div>
                            <div style=" 98%;height: 25px; line-height: 25px;margin: 2px auto 2px; border: solid 1px #f5f5f5;">访客数</div>
                            <div style=" 98%;height: 25px; line-height: 25px;margin: 2px auto 2px; border: solid 1px #f5f5f5;">访客数</div>
                            <div style=" 98%;height: 25px; line-height: 25px;margin: 2px auto 2px; border: solid 1px #f5f5f5;">访客数</div>
                            <div style=" 98%;height: 25px; line-height: 25px;margin: 2px auto 2px; border: solid 1px #f5f5f5;">访客数</div>
                            <div style=" 98%;height: 25px; line-height: 25px;margin: 2px auto 2px; border: solid 1px #f5f5f5;">访客数</div>
                            <div style=" 98%;height: 25px; line-height: 25px;margin: 2px auto 2px; border: solid 1px #f5f5f5;">访客数</div>
                            <div style=" 98%;height: 25px; line-height: 25px;margin: 2px auto 2px; border: solid 1px #f5f5f5;">访客数</div>
                            <div style=" 98%;height: 25px; line-height: 25px;margin: 2px auto 2px; border: solid 1px #f5f5f5;">访客数</div>
                            <div style=" 98%;height: 25px; line-height: 25px;margin: 2px auto 2px; border: solid 1px #f5f5f5;">访客数</div>
                            <div style=" 98%;height: 25px; line-height: 25px;margin: 2px auto 2px; border: solid 1px #f5f5f5;">访客数</div>
                        </fieldset>    

 MDN介绍fieldset:https://developer.mozilla.org/zh-CN/docs/Web/HTML/Element/fieldset