diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 5782155..41267c1 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -4,7 +4,9 @@ on: [push, pull_request]
 
 jobs:
   test-distros:
+    # 关键点 1: 在 Ubuntu 宿主机上运行 Job，而不是直接在容器里跑
     runs-on: ubuntu-latest
+    
     strategy:
       fail-fast: false
       matrix:
@@ -15,75 +17,73 @@ jobs:
           - 'alpine:latest'
           - 'almalinux:9'
           - 'rockylinux:9'
-          - 'centos:7'
+          - 'centos:7'                        # 这里的 CentOS 7 现在可以跑了！
           - 'quay.io/centos/centos:stream9'
 
-    container:
-      image: ${{ matrix.container }}
-      options: --privileged  # 必须开启特权模式
-
     steps:
+      # 关键点 2: 在宿主机上检出代码 (Ubuntu 支持 Node20，没问题)
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
-      # 1. 修复 CentOS 7 EOL 源问题
-      - name: Fix CentOS 7 EOL Repos
+      # 关键点 3: 使用 docker run 手动启动容器并挂载代码
+      - name: Run Test in Container
         run: |
-          if grep -q "CentOS Linux 7" /etc/os-release 2>/dev/null; then
-            sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-Base.repo
-            sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-Base.repo
-          fi
-
-      # 2. 安装依赖并初始化运行环境 (这是修复核心)
-      - name: Initialize Environment (Fix Docker Quirks)
-        run: |
-          echo "Initializing environment for $(cat /etc/os-release | grep PRETTY_NAME)"
+          # 打印当前测试的镜像
+          echo "🚀 Testing on image: ${{ matrix.container }}"
           
-          # --- Debian / Ubuntu ---
-          if [ -f /etc/debian_version ]; then
-            apt-get update
-            apt-get install -y curl sudo openssh-server
-            
-            # [关键修复] 生成 Host Keys，否则 sshd -t 会报错
-            ssh-keygen -A
-            # [关键修复] 创建运行目录
-            mkdir -p /run/sshd
-          fi
-
-          # --- Alpine ---
-          if [ -f /etc/alpine-release ]; then
-            apk add --no-cache curl sudo openssh-server bash
-            # [关键修复] 生成 Host Keys
-            ssh-keygen -A
-          fi
-
-          # --- RHEL / CentOS / Alma / Rocky ---
-          if [ -f /etc/redhat-release ]; then
-            # [关键修复] AlmaLinux 9 解决 curl-minimal 冲突
-            if command -v dnf >/dev/null; then
-              dnf install -y --allowerasing curl sudo openssh-server
-            else
-              yum install -y curl sudo openssh-server
-            fi
-            
-            # [关键修复] 生成 Host Keys 和目录
-            ssh-keygen -A
-            mkdir -p /run/sshd
-          fi
-
-      # 3. 运行测试脚本
-      - name: Run Init Script
-        run: |
+          # 赋予脚本执行权限
           chmod +x init.sh
-          # 使用 --strict 严格模式测试，遇到错误立即退出
-          ./init.sh --user=root --port=2222 --key-raw="ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPQQDejyTCPJO3Jyw5UX9jmojb/zjgcqVuRO28fmpWU5" --no-update --bbr --delay-restart --yes --strict
 
-      # 4. 验证结果 (可选)
-      - name: Verify Configuration
-        run: |
-          if grep -q "BEGIN SERVER-INIT MANAGED BLOCK" /etc/ssh/sshd_config; then
-            echo "✅ SUCCESS: Config block injected."
-          else
-            echo "❌ FAIL: Config block missing."
-            exit 1
-          fi
+          # 启动 Docker 容器运行测试逻辑
+          # --rm: 跑完删除
+          # --privileged: 允许修改系统参数
+          # -v $(pwd):/mnt: 把当前宿主机的代码挂载到容器的 /mnt 目录
+          docker run --rm --privileged -v $(pwd):/mnt -w /mnt ${{ matrix.container }} /bin/sh -c '
+            
+            # === 第一步：修复 CentOS 7 EOL 源 (起死回生) ===
+            if [ -f /etc/redhat-release ] && grep -q "CentOS Linux 7" /etc/redhat-release; then
+              echo "Fixing CentOS 7 EOL repos..."
+              sed -i "s/mirrorlist/#mirrorlist/g" /etc/yum.repos.d/CentOS-Base.repo
+              sed -i "s|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g" /etc/yum.repos.d/CentOS-Base.repo
+            fi
+
+            # === 第二步：环境补全 (安装 sudo, curl, sshd, 生成 key) ===
+            echo "Installing dependencies..."
+            
+            # Debian / Ubuntu
+            if [ -f /etc/debian_version ]; then
+              apt-get update -y && apt-get install -y curl sudo openssh-server
+              ssh-keygen -A
+              mkdir -p /run/sshd
+            fi
+
+            # Alpine
+            if [ -f /etc/alpine-release ]; then
+              apk add --no-cache curl sudo openssh-server bash
+              ssh-keygen -A
+            fi
+
+            # RHEL / CentOS / Alma / Rocky
+            if [ -f /etc/redhat-release ]; then
+              # AlmaLinux 9 解决 curl-minimal 冲突
+              if command -v dnf >/dev/null; then
+                dnf install -y --allowerasing curl sudo openssh-server
+              else
+                yum install -y curl sudo openssh-server
+              fi
+              ssh-keygen -A
+              mkdir -p /run/sshd
+            fi
+
+            # === 第三步：运行你的脚本 ===
+            echo "Running init script..."
+            ./init.sh --user=root --port=2222 --key-raw="ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPQQDejyTCPJO3Jyw5UX9jmojb/zjgcqVuRO28fmpWU5" --no-update --bbr --delay-restart --yes --strict
+            
+            # === 第四步：验证结果 ===
+            if grep -q "BEGIN SERVER-INIT MANAGED BLOCK" /etc/ssh/sshd_config; then
+               echo "✅ SUCCESS: Config block injected."
+            else
+               echo "❌ FAIL: Config block missing."
+               exit 1
+            fi
+          '