diff --git a/VERSIONS.json b/VERSIONS.json
index 0ca6fc1..28571c8 100644
--- a/VERSIONS.json
+++ b/VERSIONS.json
@@ -1,7 +1,7 @@
 {
   "project": "ems-frontend-template",
-  "project_version": "1.3.0",
-  "core_version": "1.3.0",
+  "project_version": "1.4.0",
+  "core_version": "1.4.0",
   "last_updated": "2026-04-06",
-  "notes": "Generic branding, removed all Tianpu-specific hardcoding"
+  "notes": "Version display on login + sidebar for field engineers"
 }
diff --git a/package.json b/package.json
index 4ae3628..b940996 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "frontend",
   "private": true,
-  "version": "1.3.0",
+  "version": "1.4.0",
   "type": "module",
   "scripts": {
     "dev": "vite",
diff --git a/src/layouts/MainLayout.tsx b/src/layouts/MainLayout.tsx
index 23415ad..0028ca9 100644
--- a/src/layouts/MainLayout.tsx
+++ b/src/layouts/MainLayout.tsx
@@ -12,7 +12,7 @@ import {
 import { Outlet, useNavigate, useLocation } from 'react-router-dom';
 import { useTranslation } from 'react-i18next';
 import { getUser, removeToken } from '../utils/auth';
-import { getAlarmStats, getAlarmEvents } from '../services/api';
+import { getAlarmStats, getAlarmEvents, getVersion } from '../services/api';
 import { useTheme } from '../contexts/ThemeContext';
 
 const { Header, Sider, Content } = Layout;
@@ -28,6 +28,7 @@ export default function MainLayout() {
   const [collapsed, setCollapsed] = useState(false);
   const [alarmCount, setAlarmCount] = useState(0);
   const [recentAlarms, setRecentAlarms] = useState<any[]>([]);
+  const [versionInfo, setVersionInfo] = useState<any>(null);
   const navigate = useNavigate();
   const location = useLocation();
   const user = getUser();
@@ -93,6 +94,10 @@ export default function MainLayout() {
     return () => clearInterval(timer);
   }, [fetchAlarms]);
 
+  useEffect(() => {
+    getVersion().then(setVersionInfo).catch(() => {});
+  }, []);
+
   const handleLogout = () => {
     removeToken();
     localStorage.removeItem('user');
@@ -136,6 +141,14 @@ export default function MainLayout() {
             }
           }}
         />
+        {!collapsed && versionInfo && (
+          <div style={{
+            padding: '8px 16px', fontSize: 11, color: 'rgba(255,255,255,0.3)',
+            borderTop: '1px solid rgba(255,255,255,0.06)', textAlign: 'center',
+          }}>
+            v{versionInfo.project_version}
+          </div>
+        )}
       </Sider>
       <Layout>
         <Header style={{
diff --git a/src/pages/Login/index.tsx b/src/pages/Login/index.tsx
index c5e2432..a7bdf81 100644
--- a/src/pages/Login/index.tsx
+++ b/src/pages/Login/index.tsx
@@ -1,8 +1,8 @@
-import { useState } from 'react';
+import { useState, useEffect } from 'react';
 import { Form, Input, Button, Card, message, Typography } from 'antd';
 import { UserOutlined, LockOutlined, ThunderboltOutlined } from '@ant-design/icons';
 import { useNavigate } from 'react-router-dom';
-import { login } from '../../services/api';
+import { login, getVersion } from '../../services/api';
 import { setToken, setUser } from '../../utils/auth';
 
 const { Title, Text } = Typography;
@@ -10,8 +10,13 @@ const { Title, Text } = Typography;
 export default function LoginPage() {
   const [loading, setLoading] = useState(false);
   const [guestLoading, setGuestLoading] = useState(false);
+  const [versionInfo, setVersionInfo] = useState<any>(null);
   const navigate = useNavigate();
 
+  useEffect(() => {
+    getVersion().then(setVersionInfo).catch(() => {});
+  }, []);
+
   const doLogin = async (username: string, password: string) => {
     const res: any = await login(username, password);
     setToken(res.access_token);
@@ -82,6 +87,11 @@ export default function LoginPage() {
             </Text>
           </div>
         </Form>
+        {versionInfo && (
+          <div style={{ textAlign: 'center', marginTop: 16, opacity: 0.4, fontSize: 11 }}>
+            v{versionInfo.project_version} | Core: v{versionInfo.core_version || '—'}
+          </div>
+        )}
       </Card>
     </div>
   );
diff --git a/src/services/api.ts b/src/services/api.ts
index 881ec23..46a764d 100644
--- a/src/services/api.ts
+++ b/src/services/api.ts
@@ -342,6 +342,9 @@ export const getStrategySavingsReport = (params: Record<string, any>) => api.get
 export const getStrategyRecommendations = () => api.get('/strategy/recommendations');
 export const simulateStrategy = (data: any) => api.post('/strategy/simulate', data);
 
+// Version info (no auth required)
+export const getVersion = () => api.get('/version').then(r => r.data);
+
 // Weather (气象数据)
 export const getWeatherCurrent = () => api.get('/weather/current');
 export const getWeatherForecast = (params?: Record<string, any>) => api.get('/weather/forecast', { params });