diff --git a/Dockerfile b/Dockerfile
index 423fe3e..02c14a4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,8 +4,25 @@ FROM --platform=linux/amd64 maven:3.9.9-eclipse-temurin-21 AS build
 ARG SERVICE_MODULE
 WORKDIR /workspace
 
+# Copy only pom files first — layer cached until any pom.xml changes
 COPY pom.xml ./pom.xml
 COPY maven-settings.xml ./maven-settings.xml
+COPY common/pom.xml ./common/pom.xml
+COPY im-sdk/pom.xml ./im-sdk/pom.xml
+COPY tenant-service/pom.xml ./tenant-service/pom.xml
+COPY im-service/pom.xml ./im-service/pom.xml
+COPY push-service/pom.xml ./push-service/pom.xml
+COPY update-service/pom.xml ./update-service/pom.xml
+COPY demo-service/pom.xml ./demo-service/pom.xml
+COPY file-service/pom.xml ./file-service/pom.xml
+COPY license-service/pom.xml ./license-service/pom.xml
+
+# Pre-download dependencies using BuildKit cache mount — persisted across builds
+RUN --mount=type=cache,target=/root/.m2 \
+    mvn -s /workspace/maven-settings.xml -pl ${SERVICE_MODULE} -am \
+        dependency:go-offline -q
+
+# Copy source — invalidates only the compile layer, not the deps layer
 COPY common ./common
 COPY im-sdk ./im-sdk
 COPY tenant-service ./tenant-service
@@ -16,9 +33,11 @@ COPY demo-service ./demo-service
 COPY file-service ./file-service
 COPY license-service ./license-service
 
-RUN mvn -U -s /workspace/maven-settings.xml -pl ${SERVICE_MODULE} -am -DskipTests package
+RUN --mount=type=cache,target=/root/.m2 \
+    mvn -s /workspace/maven-settings.xml -pl ${SERVICE_MODULE} -am -DskipTests package
 
-FROM --platform=linux/amd64 eclipse-temurin:21-jre-jammy
+# Use Alpine-based JRE — ~100MB smaller than jammy
+FROM --platform=linux/amd64 eclipse-temurin:21-jre-alpine
 WORKDIR /app
 ARG SERVICE_MODULE
 
diff --git a/Jenkinsfile b/Jenkinsfile
index 36d5d1f..97559be 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -2,28 +2,34 @@ pipeline {
   agent any
 
   parameters {
-    string(name: 'BRANCH', defaultValue: 'main', description: 'Git 分支名')
     choice(name: 'SERVICE', choices: ['tenant-service', 'im-service', 'push-service', 'update-service', 'demo-service', 'file-service', 'license-service'], description: '要构建的服务模块')
     string(name: 'IMAGE_TAG', defaultValue: 'latest', description: '镜像 Tag（如 v1.2.3 或 latest）')
     booleanParam(name: 'DEPLOY', defaultValue: true, description: '构建后是否自动部署到生产服务器')
   }
 
   environment {
-    ACR_REGISTRY  = 'crpi-n44qjpuucgjt8e8c.cn-beijing.personal.cr.aliyuncs.com'
-    ACR_NAMESPACE = 'xuqmgroup'
-    ACR_USERNAME  = 'xuqinmin12'
-    PROD_HOST     = '106.54.23.149'
-    PROD_USER     = 'ubuntu'
-    COMPOSE_FILE  = '/opt/xuqm/deploy/compose.production.yaml'
+    ACR_REGISTRY    = 'crpi-n44qjpuucgjt8e8c.cn-beijing.personal.cr.aliyuncs.com'
+    ACR_NAMESPACE   = 'xuqmgroup'
+    ACR_USERNAME    = 'xuqinmin12'
+    PROD_HOST       = '106.54.23.149'
+    PROD_USER       = 'ubuntu'
+    COMPOSE_FILE    = '/opt/xuqm/deploy/compose.production.yaml'
     DOCKER_BUILDKIT = '1'
   }
 
+  options {
+    timeout(time: 30, unit: 'MINUTES')
+    buildDiscarder(logRotator(numToKeepStr: '20'))
+    disableConcurrentBuilds()
+  }
+
   stages {
     stage('Checkout') {
       steps {
-        checkout([$class: 'GitSCM',
-          branches: [[name: "*/${params.BRANCH}"]],
-          extensions: [],
+        checkout([
+          $class: 'GitSCM',
+          branches: [[name: 'main']],
+          extensions: [[$class: 'CleanBeforeCheckout']],
           userRemoteConfigs: scm.userRemoteConfigs
         ])
       }
@@ -53,7 +59,7 @@ pipeline {
           script {
             def imageName = "${ACR_REGISTRY}/${ACR_NAMESPACE}/${params.SERVICE}:${params.IMAGE_TAG}"
             bat """
-              ssh -i "%SSH_KEY%" -o StrictHostKeyChecking=no ${PROD_USER}@${PROD_HOST} "docker pull ${imageName} && docker compose -f ${COMPOSE_FILE} up -d --no-deps ${params.SERVICE} && docker image prune -f"
+              ssh -i "%SSH_KEY%" -o StrictHostKeyChecking=no ${PROD_USER}@${PROD_HOST} "docker pull ${imageName} && docker compose -f ${COMPOSE_FILE} up -d --no-deps --force-recreate ${params.SERVICE} && docker image prune -f"
             """
           }
         }