diff --git a/src/components/chat/ChatHeader.vue b/src/components/chat/ChatHeader.vue
index df59b94..fb044f4 100644
--- a/src/components/chat/ChatHeader.vue
+++ b/src/components/chat/ChatHeader.vue
@@ -11,12 +11,12 @@
         <ChevronLeft v-else :size="18" />
       </button>
 
-      <div class="conversation-info">
+      <!-- <div class="conversation-info">
         <h1 class="title">{{ title }}</h1>
         <span v-if="messageCount > 0" class="message-count">
           {{ messageCount }} 条消息
         </span>
-      </div>
+      </div> -->
     </div>
 
     <!-- 右侧：操作按钮 -->
@@ -89,12 +89,9 @@
 import { ref } from "vue";
 import {
   Menu,
-  Maximize2,
-  Minimize2,
   Trash2,
   Download,
   ChevronLeft,
-  MoreHorizontal,
   ExternalLink,
   Pin,
   Archive,
@@ -181,12 +178,12 @@ if (typeof window !== "undefined") {
   height: 64px;
   padding: 0 20px;
   background: white;
-  border-bottom: 1px solid #e2e8f0;
+  // border-bottom: 1px solid #e2e8f0;
   flex-shrink: 0;
 
   .dark & {
     background: #1e1e2e;
-    border-bottom-color: #2d2d3d;
+    // border-bottom-color: #2d2d3d;
   }
 }
 
diff --git a/src/components/message/MessageBubble.vue b/src/components/message/MessageBubble.vue
index f61a49f..f0cbd9e 100644
--- a/src/components/message/MessageBubble.vue
+++ b/src/components/message/MessageBubble.vue
@@ -138,12 +138,12 @@
                 <span class="file-name">{{ file.name }}</span>
                 <span class="file-size">{{ formatSize(file.size) }}</span>
               </div>
-              <button
+              <!-- <button
                 class="download-btn"
                 @click="$emit('download-file', file)"
               >
                 <Download :size="16" />
-              </button>
+              </button> -->
             </div>
           </div>
         </template>
@@ -291,8 +291,8 @@ setCustomComponents("playground-demo", {
     }
 
     .message-body {
-      background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
-      color: white;
+      background: #f8fafc;
+      color: #1f2937;
       border-radius: 20px 20px 4px 20px;
     }