diff --git a/src/app/app.less b/src/app/app.less
index d5d8928c..5ae1728d 100644
--- a/src/app/app.less
+++ b/src/app/app.less
@@ -130,8 +130,8 @@ a.a-block {
 
 // main layout
 #main {
-    margin-top: 30px;
-    height: calc(100vh - 30px);
+    margin-top: 10px;
+    height: calc(100vh - 10px);
     display: flex;
     flex-direction: column;