           </div>
            <!-- row -->
        </div>
        <!-- container -->
    </div>
    <!-- header -->
    <section class="content">
        <div class="container-fluid">
            <div id="cards" class="row"></div>
            <!-- 统计数据 -->
            <div class="row"><div class="col-12">
                <div class="card">
                    <div class="card-header">
                        <h3 class="card-title">终端列表</h3>
                    </div>
                    <div