diff --git a/.gitea/workflows/runner-maintenance.yaml b/.gitea/workflows/runner-maintenance.yaml
index bdb12a4..39ad12f 100644
--- a/.gitea/workflows/runner-maintenance.yaml
+++ b/.gitea/workflows/runner-maintenance.yaml
@@ -8,12 +8,16 @@ on:
 jobs:
   health-check:
     runs-on: docker
+    container:
+      image: alpine:3.20
     steps:
+      - name: Install tools
+        run: apk add --no-cache curl docker-cli grep
+
       - name: Check Gitea health
         id: gitea
         run: |
-          STATUS=$(curl -sf http://gitea:3000/api/healthz | grep -c '"status":"pass"' || echo 0)
-          if [ "$STATUS" -ge 1 ]; then
+          if curl -sf http://gitea:3000/api/healthz | grep -q '"status":"pass"'; then
             echo "result=ok|Gitea 健康检查通过" >> $GITHUB_OUTPUT
           else
             echo "result=fail|Gitea 健康检查失败" >> $GITHUB_OUTPUT
@@ -23,10 +27,8 @@ jobs:
       - name: Check Verdaccio health
         id: verdaccio
         run: |
-          if curl -sf http://verdaccio:4873/-/ping | grep -q '"status":"ok"\|"status": "ok"'; then
+          if curl -sf http://verdaccio:4873/-/ping >/dev/null 2>&1; then
             echo "result=ok|Verdaccio 正常" >> $GITHUB_OUTPUT
-          elif curl -sf http://verdaccio:4873/-/ping >/dev/null 2>&1; then
-            echo "result=ok|Verdaccio 可访问" >> $GITHUB_OUTPUT
           else
             echo "result=fail|Verdaccio 不可达" >> $GITHUB_OUTPUT
             exit 1
@@ -37,8 +39,8 @@ jobs:
         run: |
           RESP=$(curl -sf -u "${{ secrets.CI_USER }}:${{ secrets.CI_PASSWORD }}" \
             "http://gitea:3000/api/v1/admin/actions/runners")
-          ONLINE=$(echo "$RESP" | grep -c '"status":"online"' || echo 0)
-          if [ "$ONLINE" -ge 1 ]; then
+          ONLINE=$(echo "$RESP" | grep -c '"status":"online"' || true)
+          if [ "${ONLINE:-0}" -ge 1 ]; then
             NAME=$(echo "$RESP" | grep -o '"name":"[^"]*"' | head -1 | cut -d'"' -f4)
             echo "result=ok|Runner ${NAME} 在线 (${ONLINE} 个)" >> $GITHUB_OUTPUT
           else
@@ -50,7 +52,7 @@ jobs:
         id: cleanup
         run: |
           REMOVED=0
-          for cid in $(docker ps -a --filter "label=org.opencontainers.image.source=gitea/act_runner" -q 2>/dev/null); do
+          for cid in $(docker ps -a --filter "label=org.opencontainers.image.source=gitea/act_runner" -q 2>/dev/null || true); do
             STATE=$(docker inspect -f '{{.State.Status}}' "$cid" 2>/dev/null || echo unknown)
             if [ "$STATE" = "exited" ]; then
               docker rm "$cid" >/dev/null 2>&1 && REMOVED=$((REMOVED+1)) || true