diff --git a/components/DeepResearch/DeepResearch.vue b/components/DeepResearch/DeepResearch.vue
index 35faf98..c86f445 100644
--- a/components/DeepResearch/DeepResearch.vue
+++ b/components/DeepResearch/DeepResearch.vue
@@ -380,7 +380,7 @@
         <div
           v-if="selectedNode"
           :class="[
-            'border-gray-200',
+            'border-gray-100 dark:border-gray-800',
             isLargeScreen
               ? 'border-l w-1/3 pl-4 sm:pl-6'
               : 'h-1/2 overflow-y-scroll',