diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
index 42960ec..56f3ccc 100644
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -52,19 +52,25 @@ jobs:
           # 故改为：起 maven 容器 -> docker cp 源码入容器 -> exec 构建 -> cp 产物回工作区。
           # mavenbuild 加入 infra-infra-net，用容器名 nexus 直连 Nexus(8081 maven-public)。
           # settings.xml profile 把 pom 的 HTTP 仓库重定向到 http://nexus:8081/repository/maven-public/。
-          docker rm -f mavenbuild 2>/dev/null || true
-          docker run -d --name mavenbuild \
+          # 构建容器名必须全局唯一：runner 挂的是宿主 docker.sock，容器名在整个 daemon 上共享
+          # 命名空间。固定名会在多仓/多条 workflow 并发时互相 docker rm -f 掉对方正在构建的
+          # 容器，表现为无编译报错的 exit 137（SIGKILL，2026-10-21 实测复现）。
+          # GITHUB_RUN_ID 实例级唯一，再拼时间戳兜底。
+          BUILD_CONTAINER="mavenbuild-${GITHUB_RUN_ID:-0}-$(date +%s)"
+          echo "BUILD_CONTAINER=${BUILD_CONTAINER}"
+          docker rm -f "$BUILD_CONTAINER" 2>/dev/null || true
+          docker run -d --name "$BUILD_CONTAINER" \
             --network infra-infra-net \
             -v /opt/docker/ubs-m2:/root/.m2 \
             -w /build maven:3.6.3-jdk-8 sleep 3600
-          docker cp "${PWD}/." mavenbuild:/build/
-          docker exec mavenbuild sh -c "printf '%s' '<settings><profiles><profile><id>nexus-repo</id><repositories><repository><id>nexus-internal</id><url>http://nexus:8081/repository/maven-public/</url><releases><enabled>true</enabled></releases><snapshots><enabled>true</enabled><updatePolicy>always</updatePolicy></snapshots></repository></repositories></profile></profiles><activeProfiles><activeProfile>nexus-repo</activeProfile></activeProfiles></settings>' > /root/.m2/settings.xml"
+          docker cp "${PWD}/." "$BUILD_CONTAINER":/build/
+          docker exec "$BUILD_CONTAINER" sh -c "printf '%s' '<settings><profiles><profile><id>nexus-repo</id><repositories><repository><id>nexus-internal</id><url>http://nexus:8081/repository/maven-public/</url><releases><enabled>true</enabled></releases><snapshots><enabled>true</enabled><updatePolicy>always</updatePolicy></snapshots></repository></repositories></profile></profiles><activeProfiles><activeProfile>nexus-repo</activeProfile></activeProfiles></settings>' > /root/.m2/settings.xml"
           # 仅清旧 yh-auth 缓存（缺 CasSsoAutoConfiguration 的 08-05 本地安装版），强制从 Nexus 拉 -7
-          docker exec mavenbuild rm -rf /root/.m2/repository/com/yunhai/platform/yh-auth-spring-boot-starter
-          docker exec mavenbuild sh -c 'cd /build && mvn -U -B -DskipTests clean package'
+          docker exec "$BUILD_CONTAINER" rm -rf /root/.m2/repository/com/yunhai/platform/yh-auth-spring-boot-starter
+          docker exec "$BUILD_CONTAINER" sh -c 'cd /build && mvn -U -B -DskipTests clean package'
           mkdir -p "${PWD}/target"
-          docker cp mavenbuild:/build/target/userbase.jar "${PWD}/target/userbase.jar"
-          docker rm -f mavenbuild
+          docker cp "$BUILD_CONTAINER":/build/target/userbase.jar "${PWD}/target/userbase.jar"
+          docker rm -f "$BUILD_CONTAINER"
 
       - name: Login to Nexus docker registry
         run: echo "${{ secrets.NEXUS_PASSWORD }}" | docker login nexus:8083 -u ${{ secrets.NEXUS_USER }} --password-stdin