diff --git a/.idea/misc.xml b/.idea/misc.xml
index 68c8b71..9ac5486 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" project-jdk-name="17" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_12" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
   <component name="SwUserDefinedSpecifications">
diff --git a/web/css/index.css b/web/css/index.css
index a7a6965..aa63329 100644
--- a/web/css/index.css
+++ b/web/css/index.css
@@ -269,7 +269,7 @@
     height: 30px;
     position: absolute;
     background-color: #df5000;
-
+    border: 2px solid #000000;
 }
 
 
diff --git a/web/index.jsp b/web/index.jsp
index 6f27342..c791d8e 100644
--- a/web/index.jsp
+++ b/web/index.jsp
@@ -289,6 +289,7 @@
             <%--    返回顶部    --%>
             <div class="top">
                 <span></span>
+                <span></span>
             </div>
         </div>
     </div>