diff --git a/projects/demo/src/modules/app/search/index.less b/projects/demo/src/modules/app/search/index.less
index 825216efc090..3a9b9cfad02b 100644
--- a/projects/demo/src/modules/app/search/index.less
+++ b/projects/demo/src/modules/app/search/index.less
@@ -98,3 +98,9 @@ html[data-theme='dark'] {
         color: var(--docsearch-muted-color);
     }
 }
+
+@media @tui-mobile {
+    .DocSearch-Container {
+        position: fixed;
+    }
+}