diff --git a/css/area_nav-metabox.less b/css/area_nav-metabox.less
index 82ebbb0..90b83d6 100755
--- a/css/area_nav-metabox.less
+++ b/css/area_nav-metabox.less
@@ -111,8 +111,10 @@
         .tab-pane {
             position: absolute;
             top: 0;
+            right: 0;
             display: none;
             width: 100%;
+            min-width: 20em;
             background-color: @color-content-bg;
             border: 1px solid @color-link;
             border-top-color: transparent;