diff --git a/server/public/index.html b/server/public/index.html
index 7f576ce..e8729ed 100644
--- a/server/public/index.html
+++ b/server/public/index.html
@@ -139,9 +139,14 @@
                         </svg>
                         <h2>小财记账</h2>
                     </div>
-                    <button class="icon-btn" id="create-room-btn" onclick="openCreateRoom()" title="新建群聊">
-                        <svg viewBox="0 0 24 24"><line x1="12" y1="5" x2="12" y2="19"></line><line x1="5" y1="12" x2="19" y2="12"></line></svg>
-                    </button>
+                    <div style="display:flex; gap:2px;">
+                        <button class="icon-btn" id="create-room-btn" onclick="openCreateRoom()" title="新建群聊">
+                            <svg viewBox="0 0 24 24"><line x1="12" y1="5" x2="12" y2="19"></line><line x1="5" y1="12" x2="19" y2="12"></line></svg>
+                        </button>
+                        <button class="icon-btn" id="logout-btn" onclick="logout()" title="注销登录">
+                            <svg viewBox="0 0 24 24"><path d="M9 21H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h4"/><polyline points="16 17 21 12 16 7"/><line x1="21" y1="12" x2="9" y2="12"/></svg>
+                        </button>
+                    </div>
                 </div>
                 <div class="chat-list" id="chat-list-container"></div>
                 <div class="summary-card" onclick="openSummary()">
@@ -248,6 +253,16 @@
             localStorage.removeItem('currentUser');
             localStorage.removeItem('isAdmin');
         }
+        function logout() {
+            if (ws) { ws.close(); ws = null; }
+            clearAuth();
+            document.getElementById('login-page').classList.remove('hidden');
+            document.getElementById('main-page').classList.add('hidden');
+            currentRoom = null;
+            rooms = [];
+            document.getElementById('chat-list-container').innerHTML = '';
+            document.getElementById('messages-container').innerHTML = '';
+        }
 
         if (typeof marked !== 'undefined') marked.setOptions({ breaks: true, gfm: true, sanitize: false });