diff --git a/AGENTS.md b/AGENTS.md
index dd18745..41d810a 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -24,7 +24,7 @@ This is a React 19 + TypeScript frontend for the Zhejiang Beifan Trace Coding Pl
 - Permission issuance with automatic employee serial generation
 - Product traceability management and public scan pages
 - Project work-order management for on-site implementation records
-- Aftersales work-order management for admins and technicians
+- Aftersales work-order management for admins and assigned work-order roles
 - User authentication and profile management
 
 **Tech Stack**: React 19, TypeScript, Vite 7, Ant Design 6, React Router v7, Axios
@@ -95,7 +95,7 @@ src/
   - `aftersalesApi` - Aftersales work orders (admin + public)
   - `projectOrdersApi` - Project work orders (admin + public)
   - `employeesApi` - Employee management (admin only): create/list/update/delete/reset password
-  - `usersApi` - Assignable technician/admin picker via `assignable`
+  - `usersApi` - Assignable work-order user picker via `assignable`
 - Auth token automatically added via axios interceptor
 - All API calls return typed responses based on `src/types/index.ts`
 
@@ -111,15 +111,17 @@ src/
 - Product trace QR codes use `/product-traces/:serialNumber` directly.
 - Shared public-page chrome (logo + 备案 footer) lives in `components/PublicLayout.tsx`
 - `/admin/employee-serials` is the 权限管理 page despite the legacy route name.
-- Technicians should only see/use the aftersales and project work-order modules; admins see all admin menu items.
+- Work-order roles should only see/use the aftersales and project work-order modules; admins see all admin menu items.
 
 ### Roles and Permission Issuance
-- `UserRole` is limited to `admin` / `technician` / `employee`.
+- `UserRole` includes system roles `admin`, legacy `technician`, legacy `employee`, and managed work-order roles `software_engineer`, `hardware_engineer`, `business_manager`, `project_manager`.
 - `admin`: full backend access.
-- `technician`: work-order module access only.
-- `employee`: no backend login access.
+- Managed work-order roles: login access only for assigned aftersales/project work orders.
+- `technician` is legacy-compatible and should not be offered as a new role.
+- `employee` is legacy/no backend login access and should not be offered as a new role.
 - Employee creation fields are name, phone, employee number, position, and role.
-- Password field is shown and required only for `admin` and `technician`.
+- Permission management creation/edit role choices must be exactly: 软件工程师、硬件工程师、商务经理、项目经理.
+- Password field is required for all four managed work-order roles.
 - Employee creation uses `employeesApi.create`, and the backend automatically creates the employee permission code; do not implement a separate "create then assign code" primary flow.
 - Employee rows should display generated `employeeSerials` from the employee list response.
 - Employee rows should provide a QR-code view for the active employee serial, using `/query?serial=...` as the scan target.
@@ -136,6 +138,7 @@ src/
 - Use label text `现场情况说明` for `issueDescription` in create/detail/public-confirm views.
 - In admin detail page, use `工单分配` as the UI label for reassign action.
 - Signature display text should be `客户确认签名`.
+- Only admins may create aftersales work orders. Managed work-order roles may only list/view/update/submit work orders assigned to themselves.
 
 ### Product Traceability
 - Admin route: `/admin/product-traces`.
@@ -147,6 +150,7 @@ src/
 ### Project Work Orders
 - Project order serial format is `zjbf-xm-YYMMDDNN`.
 - Project orders are for on-site investigation/implementation records.
+- Only admins may create project work orders. Managed work-order roles may only list/view/update/submit project orders assigned to themselves.
 - Completion requires site images and engineer signature, without customer signature.
 - Site image limit is 18.
 - Completed project orders use status text `已完成`.
diff --git a/README.md b/README.md
index 025c548..e34e671 100644
--- a/README.md
+++ b/README.md
@@ -104,9 +104,9 @@ VITE_API_BASE_URL=/api
 - 控制台（工单统计）
 - 权限管理
   - 创建员工时录入姓名、电话、工号、岗位、角色
-  - 角色仅保留管理员、技术员、员工
-  - 管理员/技术员有后台登录权限，创建时显示并必填初始密码
-  - 员工无后台权限，创建时不显示密码框
+  - 角色仅可选择：软件工程师、硬件工程师、商务经理、项目经理
+  - 四个角色均有后台登录权限，创建时必须设置初始密码
+  - 不允许通过权限管理创建管理员或普通员工
   - 创建员工后自动生成员工码，列表直接展示员工码
   - 支持查看员工码二维码，扫码进入公开查询页
   - 员工码查询页展示姓名、电话、工号、岗位
@@ -115,11 +115,11 @@ VITE_API_BASE_URL=/api
   - 字段顺序：企业名称、地址、电话、设备信息、质保期、出厂日期、产品序列号、官网链接（可选）、公众号二维码（可选）
   - 公众号二维码上传到 OSS，客户扫码产品二维码后可查看产品溯源信息
 - 售后工单
-  - 技术员创建工单、填写处理结果、提交客户确认
+  - 管理员创建并派单，软件工程师、硬件工程师、商务经理、项目经理只能处理分配给自己的工单
   - 工单里的企业名称是售后客户信息，只保存在工单中
   - 服务类型：软件故障 / 硬件故障 / 售后维保
   - 新建和详情字段使用“现场情况说明”
-  - 管理员可进行工单分配（重新分配技术员）或强制关闭工单
+  - 管理员可进行工单分配（重新分配工单负责人）或强制关闭工单
   - 工单状态机：待处理 → 待客户确认 → 已完成 / 已退回
 - 项目工单
   - 用于现场勘查、现场实施等项目任务
diff --git a/src/App.tsx b/src/App.tsx
index 315ab2c..7397354 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -37,7 +37,8 @@ const AdminRoutes = () => {
 
 const AdminIndexRedirect = () => {
   const user = authApi.getCurrentUser();
-  return <Navigate to={user?.role === 'technician' ? 'aftersales' : 'dashboard'} replace />;
+  const workOrderRoles = ['technician', 'software_engineer', 'hardware_engineer', 'business_manager', 'project_manager'];
+  return <Navigate to={user?.role && workOrderRoles.includes(user.role) ? 'aftersales' : 'dashboard'} replace />;
 };
 
 function App() {
diff --git a/src/components/AdminLayout.tsx b/src/components/AdminLayout.tsx
index 175500b..ef2e6a5 100644
--- a/src/components/AdminLayout.tsx
+++ b/src/components/AdminLayout.tsx
@@ -17,22 +17,24 @@ import logo from '@/assets/img/logo.png?url';
 
 const { Header, Sider, Content } = Layout;
 
+const WORK_ORDER_ROLES = ['technician', 'software_engineer', 'hardware_engineer', 'business_manager', 'project_manager'];
+
 function AdminLayout() {
   const navigate = useNavigate();
   const location = useLocation();
   const user = authApi.getCurrentUser();
-  const isTechnician = user?.role === 'technician';
+  const isWorkOrderUser = !!user?.role && WORK_ORDER_ROLES.includes(user.role);
 
   useEffect(() => {
     if (
-      isTechnician &&
+      isWorkOrderUser &&
       !location.pathname.includes('/aftersales') &&
       !location.pathname.includes('/project-orders') &&
       !location.pathname.includes('/profile')
     ) {
       navigate('/admin/aftersales', { replace: true });
     }
-  }, [isTechnician, location.pathname, navigate]);
+  }, [isWorkOrderUser, location.pathname, navigate]);
 
   const adminMenuItems = [
     {
@@ -80,7 +82,7 @@ function AdminLayout() {
       onClick: () => navigate('/admin/aftersales'),
     },
   ];
-  const menuItems = isTechnician ? technicianMenuItems : adminMenuItems;
+  const menuItems = isWorkOrderUser ? technicianMenuItems : adminMenuItems;
 
   const handleLogout = () => {
     Modal.confirm({
diff --git a/src/pages/Aftersales.tsx b/src/pages/Aftersales.tsx
index 5fda2d1..6c17d8c 100644
--- a/src/pages/Aftersales.tsx
+++ b/src/pages/Aftersales.tsx
@@ -224,7 +224,7 @@ function AftersalesPage() {
             <span>售后工单</span>
           </Space>
         }
-        extra={
+        extra={isAdmin ? (
           <Button
             type="primary"
             icon={<PlusOutlined />}
@@ -232,7 +232,7 @@ function AftersalesPage() {
           >
             新建工单
           </Button>
-        }
+        ) : null}
       >
         <Space style={{ marginBottom: 16, flexWrap: 'wrap' }}>
           <Input.Search
diff --git a/src/pages/AftersalesDetail.tsx b/src/pages/AftersalesDetail.tsx
index ff3d613..0887a3d 100644
--- a/src/pages/AftersalesDetail.tsx
+++ b/src/pages/AftersalesDetail.tsx
@@ -57,6 +57,14 @@ const WORK_ORDER_STATUS_COLOR: Record<AftersalesWorkOrderStatus, string> = {
   rejected: 'warning',
 };
 
+const ROLE_LABEL: Record<string, string> = {
+  technician: '技术员（旧）',
+  software_engineer: '软件工程师',
+  hardware_engineer: '硬件工程师',
+  business_manager: '商务经理',
+  project_manager: '项目经理',
+};
+
 function statusStepIndex(status: AftersalesWorkOrderStatus): number {
   switch (status) {
     case 'created':
@@ -670,16 +678,16 @@ function AftersalesDetailPage() {
         cancelText="取消"
       >
         <Form layout="vertical">
-          <Form.Item label="选择技术员" required>
+          <Form.Item label="选择工单负责人" required>
             <Select
-              placeholder="请选择技术员或管理员"
+              placeholder="请选择工单负责人"
               value={reassignTechnicianId}
               onChange={(v) => setReassignTechnicianId(v)}
               showSearch
               optionFilterProp="label"
               options={assignableUsers.map((u) => ({
                 value: u.id,
-                label: `${u.name}（${u.username}）${u.role === 'admin' ? ' · 管理员' : ' · 技术员'}`,
+                label: `${u.name}（${u.username}） · ${ROLE_LABEL[u.role] || u.role}`,
               }))}
             />
           </Form.Item>
diff --git a/src/pages/EmployeeSerials.tsx b/src/pages/EmployeeSerials.tsx
index 416a843..522220e 100644
--- a/src/pages/EmployeeSerials.tsx
+++ b/src/pages/EmployeeSerials.tsx
@@ -27,18 +27,32 @@ import type { User, UserRole, CreateUserRequest, UpdateUserRequest, EmployeeSeri
 
 const ROLE_LABEL: Record<UserRole, string> = {
   admin: '管理员',
-  technician: '技术员',
+  technician: '技术员（旧）',
   employee: '员工',
+  software_engineer: '软件工程师',
+  hardware_engineer: '硬件工程师',
+  business_manager: '商务经理',
+  project_manager: '项目经理',
 };
 
 const ROLE_COLOR: Record<UserRole, string> = {
   admin: 'red',
-  technician: 'blue',
+  technician: 'default',
   employee: 'green',
+  software_engineer: 'blue',
+  hardware_engineer: 'cyan',
+  business_manager: 'gold',
+  project_manager: 'purple',
 };
 
-const BACKEND_ROLES: UserRole[] = ['admin', 'technician'];
-const ROLE_OPTIONS = (Object.keys(ROLE_LABEL) as UserRole[]).map((value) => ({
+const WORK_ORDER_ROLES: UserRole[] = [
+  'software_engineer',
+  'hardware_engineer',
+  'business_manager',
+  'project_manager',
+];
+const BACKEND_ROLES: UserRole[] = ['admin', 'technician', ...WORK_ORDER_ROLES];
+const ROLE_OPTIONS = WORK_ORDER_ROLES.map((value) => ({
   value,
   label: ROLE_LABEL[value],
 }));
@@ -103,15 +117,12 @@ function EmployeeSerialsPage() {
 
   const openCreate = () => {
     createForm.resetFields();
-    createForm.setFieldsValue({ role: 'employee' });
+    createForm.setFieldsValue({ role: 'software_engineer' });
     setCreateVisible(true);
   };
 
   const handleCreate = async (values: CreateUserRequest) => {
     const payload = { ...values, username: values.employeeNo };
-    if (!canLoginBackend(values.role)) {
-      delete payload.password;
-    }
 
     setCreateLoading(true);
     try {
@@ -353,7 +364,7 @@ function EmployeeSerialsPage() {
         footer={null}
         width={520}
       >
-        <Form form={createForm} layout="vertical" onFinish={handleCreate} initialValues={{ role: 'employee' }}>
+        <Form form={createForm} layout="vertical" onFinish={handleCreate} initialValues={{ role: 'software_engineer' }}>
           <Form.Item name="name" label="姓名" rules={[{ required: true, message: '请输入姓名' }]}>
             <Input />
           </Form.Item>
@@ -367,16 +378,9 @@ function EmployeeSerialsPage() {
             <Input />
           </Form.Item>
           <Form.Item name="role" label="角色" rules={[{ required: true, message: '请选择角色' }]}>
-            <Select
-              options={ROLE_OPTIONS}
-              onChange={(role: UserRole) => {
-                if (!canLoginBackend(role)) {
-                  createForm.setFieldValue('password', undefined);
-                }
-              }}
-            />
+            <Select options={ROLE_OPTIONS} />
           </Form.Item>
-          {canLoginBackend(createRole) && (
+          {createRole && (
             <Form.Item
               name="password"
               label="初始密码"
diff --git a/src/pages/Login.tsx b/src/pages/Login.tsx
index d4695f8..d1e26aa 100644
--- a/src/pages/Login.tsx
+++ b/src/pages/Login.tsx
@@ -25,7 +25,8 @@ function LoginPage() {
       
       message.success('登录成功！');
       setTimeout(() => {
-        navigate(user.role === 'technician' ? '/admin/aftersales' : '/admin/dashboard');
+        const workOrderRoles = ['technician', 'software_engineer', 'hardware_engineer', 'business_manager', 'project_manager'];
+        navigate(workOrderRoles.includes(user.role) ? '/admin/aftersales' : '/admin/dashboard');
       }, 500);
     } catch (error: any) {
       message.error(error.message || '登录失败，请重试');
diff --git a/src/pages/Profile.tsx b/src/pages/Profile.tsx
index 146cb3b..7b76124 100644
--- a/src/pages/Profile.tsx
+++ b/src/pages/Profile.tsx
@@ -4,6 +4,16 @@ import { UserOutlined, LockOutlined, SafetyOutlined, KeyOutlined, ExclamationCir
 import { authApi } from '@/services/api';
 import type { User } from '@/types';
 
+const ROLE_LABEL: Record<string, string> = {
+  admin: '管理员',
+  technician: '技术员（旧）',
+  employee: '员工',
+  software_engineer: '软件工程师',
+  hardware_engineer: '硬件工程师',
+  business_manager: '商务经理',
+  project_manager: '项目经理',
+};
+
 function ProfilePage() {
   const [profileForm] = Form.useForm();
   const [passwordForm] = Form.useForm();
@@ -87,7 +97,7 @@ function ProfilePage() {
                 <Descriptions.Item label="用户名">{user.username}</Descriptions.Item>
                 <Descriptions.Item label="姓名">{user.name}</Descriptions.Item>
                 <Descriptions.Item label="邮箱">{user.email || '-'}</Descriptions.Item>
-                <Descriptions.Item label="角色">{user.role}</Descriptions.Item>
+                <Descriptions.Item label="角色">{ROLE_LABEL[user.role] || user.role}</Descriptions.Item>
                 <Descriptions.Item label="创建时间">
                   {new Date(user.createdAt).toLocaleString('zh-CN')}
                 </Descriptions.Item>
@@ -270,4 +280,4 @@ function ProfilePage() {
   );
 }
 
-export default ProfilePage;
\ No newline at end of file
+export default ProfilePage;
diff --git a/src/pages/ProjectOrderDetail.tsx b/src/pages/ProjectOrderDetail.tsx
index ec4ec1d..7ae9af1 100644
--- a/src/pages/ProjectOrderDetail.tsx
+++ b/src/pages/ProjectOrderDetail.tsx
@@ -56,6 +56,14 @@ const WORK_ORDER_STATUS_COLOR: Record<ProjectOrderStatus, string> = {
   closed: 'success',
 };
 
+const ROLE_LABEL: Record<string, string> = {
+  technician: '技术员（旧）',
+  software_engineer: '软件工程师',
+  hardware_engineer: '硬件工程师',
+  business_manager: '商务经理',
+  project_manager: '项目经理',
+};
+
 function statusStepIndex(status: ProjectOrderStatus): number {
   switch (status) {
     case 'created':
@@ -640,16 +648,16 @@ function ProjectOrderDetailPage() {
         cancelText="取消"
       >
         <Form layout="vertical">
-          <Form.Item label="选择技术员" required>
+          <Form.Item label="选择工单负责人" required>
             <Select
-              placeholder="请选择技术员或管理员"
+              placeholder="请选择工单负责人"
               value={reassignTechnicianId}
               onChange={(v) => setReassignTechnicianId(v)}
               showSearch
               optionFilterProp="label"
               options={assignableUsers.map((u) => ({
                 value: u.id,
-                label: `${u.name}（${u.username}）${u.role === 'admin' ? ' · 管理员' : ' · 技术员'}`,
+                label: `${u.name}（${u.username}） · ${ROLE_LABEL[u.role] || u.role}`,
               }))}
             />
           </Form.Item>
diff --git a/src/pages/ProjectOrders.tsx b/src/pages/ProjectOrders.tsx
index 167cb98..898521d 100644
--- a/src/pages/ProjectOrders.tsx
+++ b/src/pages/ProjectOrders.tsx
@@ -218,7 +218,7 @@ function ProjectOrdersPage() {
             <span>项目工单</span>
           </Space>
         }
-        extra={
+        extra={isAdmin ? (
           <Button
             type="primary"
             icon={<PlusOutlined />}
@@ -226,7 +226,7 @@ function ProjectOrdersPage() {
           >
             新建项目工单
           </Button>
-        }
+        ) : null}
       >
         <Space style={{ marginBottom: 16, flexWrap: 'wrap' }}>
           <Input.Search
diff --git a/src/types/index.ts b/src/types/index.ts
index 80937c4..a893871 100644
--- a/src/types/index.ts
+++ b/src/types/index.ts
@@ -1,4 +1,11 @@
-export type UserRole = 'admin' | 'technician' | 'employee';
+export type UserRole =
+  | 'admin'
+  | 'technician'
+  | 'employee'
+  | 'software_engineer'
+  | 'hardware_engineer'
+  | 'business_manager'
+  | 'project_manager';
 
 export interface User {
   id: number;