diff --git a/skill/gitea/create-runner.md b/skill/gitea/create-runner.md
index 2ce1d5e..fd81cde 100644
--- a/skill/gitea/create-runner.md
+++ b/skill/gitea/create-runner.md
@@ -119,7 +119,9 @@ host:
   workdir_parent: /data/workspace
 YAML
 
-    local labels="ubuntu-latest:docker://node:16-bullseye,ubuntu-22.04:docker://node:16-bullseye,ubuntu-20.04:docker://node:16-buster,linux:docker://node:16-bullseye"
+    # 使用 catthehacker/ubuntu:act-* 镜像，内置 Docker CLI、Buildx 等 CI/CD 工具
+    # 注意：不要使用 node:16-bullseye 等纯运行时镜像，它们不包含 docker 命令
+    local labels="ubuntu-latest:docker://catthehacker/ubuntu:act-latest,ubuntu-22.04:docker://catthehacker/ubuntu:act-22.04,ubuntu-20.04:docker://catthehacker/ubuntu:act-20.04,linux:docker://catthehacker/ubuntu:act-latest"
     
     docker run -d \
       --name "$name" \
@@ -627,7 +629,13 @@ create_runner() {
   else
     # Docker mode uses standard labels mapping to images
     # Format: label:docker://image
-    labels="ubuntu-latest:docker://node:16-bullseye,ubuntu-22.04:docker://node:16-bullseye,ubuntu-20.04:docker://node:16-buster,linux:docker://node:16-bullseye"
+    # 重要：必须使用包含 Docker CLI 的镜像，否则 docker/login-action 等 actions 会失败
+    # catthehacker/ubuntu:act-* 是专为 GitHub/Gitea Actions 设计的镜像，预装：
+    #   - Docker CLI (docker 命令)
+    #   - Docker Buildx
+    #   - git, curl, jq 等常用工具
+    # 不要使用 node:16-bullseye 等纯运行时镜像！
+    labels="ubuntu-latest:docker://catthehacker/ubuntu:act-latest,ubuntu-22.04:docker://catthehacker/ubuntu:act-22.04,ubuntu-20.04:docker://catthehacker/ubuntu:act-20.04,linux:docker://catthehacker/ubuntu:act-latest"
   fi
   
   echo "✓ Labels ($mode):"
@@ -888,7 +896,13 @@ if [ "$RUNNER_MODE" = "host" ]; then
 else
   # Docker mode uses standard labels mapping to images
   # Format: label:docker://image
-  labels="ubuntu-latest:docker://node:16-bullseye,ubuntu-22.04:docker://node:16-bullseye,ubuntu-20.04:docker://node:16-buster,linux:docker://node:16-bullseye"
+  # 重要：必须使用包含 Docker CLI 的镜像，否则 docker/login-action 等 actions 会失败
+  # catthehacker/ubuntu:act-* 是专为 GitHub/Gitea Actions 设计的镜像，预装：
+  #   - Docker CLI (docker 命令)
+  #   - Docker Buildx
+  #   - git, curl, jq 等常用工具
+  # 不要使用 node:16-bullseye 等纯运行时镜像！
+  labels="ubuntu-latest:docker://catthehacker/ubuntu:act-latest,ubuntu-22.04:docker://catthehacker/ubuntu:act-22.04,ubuntu-20.04:docker://catthehacker/ubuntu:act-20.04,linux:docker://catthehacker/ubuntu:act-latest"
 fi
 
 echo "✓ Labels ($RUNNER_MODE):"