diff --git "a/.github/workflows/\347\255\276\345\210\260.yml" "b/.github/workflows/\347\255\276\345\210\260.yml"
index 761a68c..23ff1e6 100644
--- "a/.github/workflows/\347\255\276\345\210\260.yml"
+++ "b/.github/workflows/\347\255\276\345\210\260.yml"
@@ -2,14 +2,20 @@ name: 签到
 on:
   workflow_dispatch:
   schedule:
-    - cron: '10 17 * * *'
+    - cron: '0 0 * * *'
 permissions:
   contents: read
 jobs:
   run:
     runs-on: ubuntu-latest
-    timeout-minutes: 30
+    timeout-minutes: 150
     steps:
+      - name: 随机延迟（仅定时触发，落在北京时间 08:00-10:00）
+        if: ${{ github.event_name == 'schedule' }}
+        run: |
+          DELAY=$(( RANDOM % 121 ))
+          echo "随机延迟 ${DELAY} 分钟，预计北京时间 08:00 后约 ${DELAY} 分触发签到"
+          sleep ${DELAY}m
       - name: 检出仓库
         uses: actions/checkout@v4
       - name: 创建 Node 环境