diff --git a/packages/plugin-outline-pane/src/views/style.less b/packages/plugin-outline-pane/src/views/style.less
index 9847ac494..32fd979cf 100644
--- a/packages/plugin-outline-pane/src/views/style.less
+++ b/packages/plugin-outline-pane/src/views/style.less
@@ -2,7 +2,7 @@
   height: 100%;
   width: 100%;
   position: relative;
-  z-index: 2;
+  z-index: 200;
   background-color: white;
 
   > .lc-outline-tree-container {
@@ -227,7 +227,6 @@
 
       .tree-node-title-label {
         flex: 1;
-        overflow: hidden;
         white-space: nowrap;
         text-overflow: ellipsis;
         display: flex;