diff --git a/.gitea/workflows/deploy.yaml b/.gitea/workflows/deploy.yaml
index 0db8ea9..23610a6 100644
--- a/.gitea/workflows/deploy.yaml
+++ b/.gitea/workflows/deploy.yaml
@@ -34,6 +34,20 @@ jobs:
             ./ amba@192.168.0.103:/home/amba/koori-erp/
           rm ~/.ssh/id_rsa_demo
 
+      # 1.5 啟用維護模式（讓使用者看到維護畫面而非 500）
+      - name: Step 1.5 - Enable Maintenance Mode
+        uses: appleboy/ssh-action@master
+        with:
+          host: 192.168.0.103
+          port: 22
+          username: amba
+          key: ${{ secrets.DEMO_SSH_KEY }}
+          script: |
+            cd /home/amba/koori-erp
+            if [ -f artisan ]; then
+              docker exec koori-erp-laravel php artisan down --refresh=15 --retry=60 || true
+            fi
+
       # 2. 啟動或重建容器（502 最容易發生在這裡的瞬間）
       - name: Step 2 - Container Up & Health Check
         uses: appleboy/ssh-action@master
@@ -67,6 +81,17 @@ jobs:
           "
           docker exec koori-erp-laravel chmod -R 775 /var/www/html/storage /var/www/html/bootstrap/cache
 
+      # 4. 關閉維護模式（部署完成，恢復服務）
+      - name: Step 4 - Disable Maintenance Mode
+        uses: appleboy/ssh-action@master
+        with:
+          host: 192.168.0.103
+          port: 22
+          username: amba
+          key: ${{ secrets.DEMO_SSH_KEY }}
+          script: |
+            docker exec koori-erp-laravel php artisan up
+
   # --- 2. 正式環境部署 (erp.koori.tw:2224) ---
   deploy-production:
     if: github.ref == 'refs/heads/main'
@@ -93,6 +118,20 @@ jobs:
             ./ root@erp.koori.tw:/var/www/koori-erp-prod/
           rm ~/.ssh/id_rsa_prod
 
+      # 1.5 啟用維護模式（讓使用者看到維護畫面而非 500）
+      - name: Step 1.5 - Enable Maintenance Mode
+        uses: appleboy/ssh-action@master
+        with:
+          host: erp.koori.tw
+          port: 2224
+          username: root
+          key: ${{ secrets.PROD_SSH_KEY }}
+          script: |
+            cd /var/www/koori-erp-prod
+            if [ -f artisan ]; then
+              docker exec koori-erp-laravel php artisan down --refresh=15 --retry=60 || true
+            fi
+
       # 2. 啟動或重建容器（502 最容易發生在這裡的瞬間）
       - name: Step 2 - Container Up & Health Check
         uses: appleboy/ssh-action@master
@@ -119,6 +158,17 @@ jobs:
             "
             docker exec koori-erp-laravel chmod -R 775 /var/www/html/storage /var/www/html/bootstrap/cache
 
+      # 3. 關閉維護模式（部署完成，恢復服務）
+      - name: Step 3 - Disable Maintenance Mode
+        uses: appleboy/ssh-action@master
+        with:
+          host: erp.koori.tw
+          port: 2224
+          username: root
+          key: ${{ secrets.PROD_SSH_KEY }}
+          script: |
+            docker exec koori-erp-laravel php artisan up
+
 
       # 3. 處理後端與前端依賴（這時網站可能因為沒 vendor 呈現 500/502）
       # - name: Step 3 - Composer & NPM Build