diff --git a/src/main/resources/static/default.html b/src/main/resources/static/default.html
index fbbbf8b..c2a5ee9 100644
--- a/src/main/resources/static/default.html
+++ b/src/main/resources/static/default.html
@@ -84,7 +84,7 @@
                 </div>
             </div>
         </div>
-        <div class="layui-col-lg10 layui-col-md10 layui-col-sm-10 layui-col-xs12">
+        <div class="layui-col-lg10 layui-col-md10 layui-col-sm-10 layui-col-xs10">
             <div class="layui-card">
                 <div class="layui-col-md12 layui-col-space10" id="threeMeetLessonTemplateBox"></div>
                 <script type="text/html" id="threeMeetLessonTemplate">