diff --git a/src/pages/chats/[id]/index.vue b/src/pages/chats/[id]/index.vue
index 2a679e0..ae47370 100644
--- a/src/pages/chats/[id]/index.vue
+++ b/src/pages/chats/[id]/index.vue
@@ -22,7 +22,10 @@
       </template>
 
       <v-card-text class="bg-surface-light pt-4">
-        <div v-if="message.role == 'assistant' || message.role == 'system'">
+        <div
+          v-if="message.role == 'assistant' || message.role == 'system'"
+          class="text-left"
+        >
           <vue-markdown :source="message.content" />
         </div>
 
@@ -124,8 +127,7 @@ function streamChat(streamId: String) {
   // 滚动页面到最底部
   window.scrollTo(0, document.body.scrollHeight);
 
-  // set index
-  const i = (messages.value.data?.length ?? 1) - 1;
+  let i = 0;
 
   evtSource.addEventListener("data", (e) => {
     const data = JSON.parse(e.data);
@@ -174,6 +176,8 @@ function streamChat(streamId: String) {
 
           messageAdded = true;
           append = true;
+          // set index
+          i = (messages.value.data?.length ?? 1) - 1;
         }
     }