diff --git a/module/css/vmap.less b/module/css/vmap.less
index fa7278d2fcf13ac3cdd3f2529f01158bff52c206..aa8dcb821effe7b2b601906a41154656cbf0bd71 100644
--- a/module/css/vmap.less
+++ b/module/css/vmap.less
@@ -2432,13 +2432,23 @@ div.vmap-select-scale-alert{
 
 #basic-tools-dropdown-comapremode{
     margin: -10px -1px;
-    width: 30%;
     min-width: 450px;
     max-width: 550px;
     min-height: 55px;
     padding-top: 15px !important;
 }
 
+@media only screen and (max-width:1200px) {
+    #basic-tools-dropdown-comapremode {
+        width: 30%;
+    }
+}
+@media only screen and (min-width:1200px) {
+    #basic-tools-dropdown-comapremode {
+        width: 550px;
+    }
+}
+
 .basic-tools-element>span.icon-mirror {
     font-size: 16px;
     line-height: 0;