diff --git a/Dockerfile b/Dockerfile
index 77cd790..b89f18e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,6 +6,9 @@ FROM ${NODE_IMAGE} AS build
 
 WORKDIR /app
 
+# 为类型检查和打包留出原生内存余量，容器总内存由构建入口限制为 3GiB。
+ENV NODE_OPTIONS=--max-old-space-size=2048
+
 # Corepack 与 pnpm 依赖均通过 npmmirror 下载，避免构建时访问 npm 官方源过慢。
 ENV COREPACK_NPM_REGISTRY=https://registry.npmmirror.com
 ENV NPM_CONFIG_REGISTRY=https://registry.npmmirror.com
diff --git a/Jenkinsfile b/Jenkinsfile
index 19da01a..0c9fed6 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -3,6 +3,7 @@ pipeline {
   options {
     timestamps()
     disableConcurrentBuilds()
+    timeout(time: 20, unit: 'MINUTES')
   }
   stages {
     stage('检查测试发布参数') {
@@ -27,8 +28,12 @@ pipeline {
       when { expression { !env.JOB_BASE_NAME?.endsWith('-prod') } }
       steps {
         sh '''set -eu
-          docker compose -f docker-compose.test.yml build --pull=false
-          docker compose -f docker-compose.test.yml up -d --wait --wait-timeout 120
+          sh scripts/build-image.sh --pull=false \
+            --build-arg NODE_IMAGE="${NODE_BASE_IMAGE:-node:22-alpine}" \
+            --build-arg NGINX_IMAGE="${NGINX_BASE_IMAGE:-nginx:1.27-alpine}" \
+            --build-arg VITE_ADMIN_WEB_ORIGIN="$VITE_ADMIN_WEB_ORIGIN" \
+            -t "client-web-test:$IMAGE_TAG" .
+          docker compose -f docker-compose.test.yml up -d --no-build --pull never --wait --wait-timeout 120
           docker compose -f docker-compose.test.yml exec -T client-web wget -qO- http://127.0.0.1/healthz
         '''
       }
diff --git a/README.md b/README.md
index 36f3f95..9a54941 100644
--- a/README.md
+++ b/README.md
@@ -54,3 +54,5 @@ pnpm test
 仅保留 `docker-compose.test.yml` 与 test Jenkins Job。发布前注入 `API_UPSTREAM`（统一 Gateway origin，不含 `/api`）、`TEST_NETWORK`（后端共享测试网络）、`VITE_ADMIN_WEB_ORIGIN`（管理后台 origin，构建时用于安全代登录）与 `IMAGE_TAG`（Jenkins 从当前提交生成）。`HOST_PORT` 默认 9002 且仅绑定 loopback；宿主机反向代理负责外部入口。可选 `NODE_BASE_IMAGE`/`NGINX_BASE_IMAGE`，私有镜像认证由构建节点管理。不得把本地构建结果描述为测试环境已发布。
 
 同机目标默认值：`API_UPSTREAM=http://gateway:9000`、`TEST_NETWORK=firstleg-test-network`；必须与后端同批 test Compose 配置一致。
+
+Jenkins 的测试及灰度镜像构建均通过 `scripts/build-image.sh`，Compose 只部署已构建镜像。构建预算及节点要求见[部署指南](../../docs/测试环境Jenkins部署指南.md)。离线回归为 `node --test scripts/build-resource-contract.test.mjs`，本机仍经统一 `local-check.ps1` 入口运行。
diff --git a/scripts/build-image.sh b/scripts/build-image.sh
new file mode 100644
index 0000000..a617456
--- /dev/null
+++ b/scripts/build-image.sh
@@ -0,0 +1,18 @@
+#!/bin/sh
+set -eu
+
+# 构建前至少保留 1GiB 给业务服务，避免在宿主机内存不足时继续启动构建。
+available_kib=$(awk '$1 == "MemAvailable:" { print $2 }' /proc/meminfo)
+case "$available_kib" in
+  ''|*[!0-9]*) echo 'Cannot read host available memory; build refused.' >&2; exit 69 ;;
+esac
+if [ "$available_kib" -lt 4194304 ]; then
+  echo 'Docker build requires at least 4GiB available host memory; retry after resources recover.' >&2
+  exit 75
+fi
+
+# 当前节点使用 Docker 26 的经典构建器。显式固定后端，确保资源参数实际生效。
+# 限制覆盖每个 RUN 容器，失败时也清理中间容器，超时由宿主机独立终止。
+exec env DOCKER_BUILDKIT=0 timeout --signal=TERM --kill-after=30s 15m \
+  docker build --memory=3g --memory-swap=3g \
+  --cpu-period=100000 --cpu-quota=200000 --force-rm "$@"
diff --git a/scripts/build-resource-contract.test.mjs b/scripts/build-resource-contract.test.mjs
new file mode 100644
index 0000000..12ec275
--- /dev/null
+++ b/scripts/build-resource-contract.test.mjs
@@ -0,0 +1,67 @@
+import assert from 'node:assert/strict'
+import { existsSync, mkdtempSync, readFileSync, rmSync, writeFileSync } from 'node:fs'
+import { tmpdir } from 'node:os'
+import { basename, dirname, join, resolve } from 'node:path'
+import { spawnSync } from 'node:child_process'
+import { fileURLToPath } from 'node:url'
+import test from 'node:test'
+
+const root = fileURLToPath(new URL('../', import.meta.url))
+const wrapper = join(root, 'scripts/build-image.sh')
+const bash = process.platform === 'win32' ? 'C:/Program Files/Git/bin/bash.exe' : 'bash'
+const shellAvailable = process.platform !== 'win32' || existsSync(bash)
+
+// 使用替身验证参数、内存预检和退出码，不启动 Docker 或访问部署环境。
+function runBuild(availableMemory, childStatus = '0') {
+  const directory = mkdtempSync(join(tmpdir(), 'frontend-build-resource-'))
+  try {
+    writeFileSync(join(directory, 'awk'), '#!/bin/sh\nprintf "%s\\n" "$TEST_AVAILABLE_MEMORY"\n', { mode: 0o755 })
+    writeFileSync(join(directory, 'timeout'), '#!/bin/sh\nprintf "%s\\n" watchdog "$@"\nshift 3\nexec "$@"\n', { mode: 0o755 })
+    writeFileSync(join(directory, 'docker'), '#!/bin/sh\nprintf "%s\\n" "builder=$DOCKER_BUILDKIT" "$@"\nexit "$TEST_CHILD_STATUS"\n', { mode: 0o755 })
+    return spawnSync(bash, ['-c',
+      'testbin=$(cd "$1" && pwd); shift; PATH="$testbin:$PATH"; export PATH; exec sh "$@"',
+      'fixture', directory.replaceAll('\\', '/'), wrapper.replaceAll('\\', '/'),
+      '--build-arg', 'VALUE=with space', '-t', 'web:test', '.'], {
+      encoding: 'utf8', timeout: 10000,
+      env: { ...process.env, DOCKER_BUILDKIT: '1', TEST_AVAILABLE_MEMORY: availableMemory, TEST_CHILD_STATUS: childStatus }
+    })
+  } finally {
+    assert.equal(dirname(resolve(directory)), resolve(tmpdir()))
+    rmSync(directory, { recursive: true })
+  }
+}
+
+test('TEST and gray builds share the resource gate and deployment cannot rebuild implicitly', () => {
+  const pipeline = readFileSync(join(root, 'Jenkinsfile'), 'utf8')
+  const production = readFileSync(join(root, 'scripts/deploy-production.sh'), 'utf8')
+  const dockerfile = readFileSync(join(root, 'Dockerfile'), 'utf8')
+  for (const source of [pipeline, production]) {
+    assert.match(source, /sh scripts\/build-image\.sh/)
+    assert.doesNotMatch(source, /docker (?:compose[^\n]* build|build\s)/)
+  }
+  assert.match(pipeline, /timeout\(time: 20, unit: 'MINUTES'\)/)
+  assert.match(pipeline, /up -d --no-build --pull never --wait/)
+  assert.ok(pipeline.includes(`-t "${basename(root)}-test:$IMAGE_TAG"`))
+  assert.match(dockerfile, /^ENV NODE_OPTIONS=--max-old-space-size=2048$/m)
+})
+
+test('build forwards quoted arguments, enforces container budgets and propagates failure', { skip: !shellAvailable }, () => {
+  const result = runBuild('4194304', '23')
+  assert.equal(result.status, 23, result.stderr)
+  assert.match(result.stdout, /watchdog\r?\n--signal=TERM\r?\n--kill-after=30s\r?\n15m\r?\ndocker\r?\nbuild/)
+  assert.match(result.stdout, /builder=0\r?\nbuild/)
+  for (const argument of ['--memory=3g', '--memory-swap=3g', '--cpu-period=100000', '--cpu-quota=200000', '--force-rm']) {
+    assert.ok(result.stdout.split(/\r?\n/).includes(argument), argument)
+  }
+  assert.match(result.stdout, /--build-arg\r?\nVALUE=with space\r?\n-t\r?\nweb:test\r?\n\./)
+  assert.equal(runBuild('8388608').status, 0)
+  assert.equal(runBuild('8388608', '124').status, 124)
+})
+
+test('low or unreadable host memory refuses to start Docker', { skip: !shellAvailable }, () => {
+  for (const [memory, status] of [['4194303', 75], ['', 69], ['unknown', 69]]) {
+    const result = runBuild(memory)
+    assert.equal(result.status, status, result.stderr)
+    assert.equal(result.stdout, '')
+  }
+})
diff --git a/scripts/deploy-production.sh b/scripts/deploy-production.sh
index ebcb234..a59a72a 100644
--- a/scripts/deploy-production.sh
+++ b/scripts/deploy-production.sh
@@ -35,7 +35,7 @@ DOCKER_CONFIG=$(mktemp -d)
 cleanup() { rm -f "$DOCKER_CONFIG/config.json"; rmdir "$DOCKER_CONFIG" 2>/dev/null || true; }
 trap cleanup EXIT HUP INT TERM
 printf '%s' "$BUILD_REGISTRY_PASSWORD" | docker login -u "$BUILD_REGISTRY_USER" --password-stdin "$registry"
-docker build --build-arg NODE_IMAGE="${NODE_BASE_IMAGE:-node:22-alpine}" \
+sh scripts/build-image.sh --build-arg NODE_IMAGE="${NODE_BASE_IMAGE:-node:22-alpine}" \
   --build-arg NGINX_IMAGE="${NGINX_BASE_IMAGE:-nginx:1.27-alpine}" \
   --build-arg VITE_ADMIN_WEB_ORIGIN="$PUBLIC_WEB_ORIGIN" -t "$image" .
 docker push "$image"