diff --git a/app/api/routers/auth.py b/app/api/routers/auth.py
index 5709a88..22c9d47 100644
--- a/app/api/routers/auth.py
+++ b/app/api/routers/auth.py
@@ -39,6 +39,7 @@ from ..schemas.auth import (
 )
 from ...infrastructure.repositories import Database
 from ...services import sms, wechat
+from ...domain.account_types import account_type, permission_role, label as account_type_label
 
 router = APIRouter(prefix="/auth", tags=["auth"])
 
@@ -144,17 +145,19 @@ async def _issue_token(
     否则回退到 ``users.role``（单角色/中性令牌）。
     """
     role = (identity or user).get("role", "opc_member")
-    sub_role = (identity or user).get("sub_role")
+    # 账号类型(四种)统一解析；子角色已停用(置 None)
+    atype = account_type(role)
+    sub_role = None
     org_id = (identity or user).get("org_id")
     region_id = (identity or user).get("region_id")
     identity_id = identity.get("id") if identity else None
 
-    perms = await db.roles.permissions_for(role, sub_role)
+    perms = await db.roles.permissions_for(permission_role(atype), None)
     scope_ids = await db.regions.visible_region_ids(region_id)
     scope_level = await db.regions.level(region_id)
 
     token_user = dict(user)
-    token_user.update(role=role, sub_role=sub_role, org_id=org_id, region_id=region_id)
+    token_user.update(account_type=atype, role=role, sub_role=None, org_id=org_id, region_id=region_id)
     await db.users.mark_login(user["id"])  # 记录最近登录时间（每次签发令牌=一次活动）
     return await db.tokens.create(
         token_user,
@@ -173,7 +176,8 @@ async def _profile_for(
 ) -> dict:
     """按身份（或回退用户单角色）构建对外资料字典。"""
     role = (identity or user).get("role", "opc_member")
-    sub_role = (identity or user).get("sub_role")
+    atype = account_type(role)   # 四种账号类型（子角色已停用）
+    sub_role = None
     org_id = (identity or user).get("org_id")
     region_id = (identity or user).get("region_id")
     profile = {f: user.get(f, "") for f in _PROFILE_FIELDS}
@@ -195,12 +199,13 @@ async def _profile_for(
     profile["affiliation"] = user.get("affiliation", "independent")
     profile["park_id"] = user.get("park_id", "")
     profile["park_name"] = user.get("park_name", "")
-    profile["account_type"] = user.get("account_type", "opc_default")
-    profile["role"] = role
-    profile["sub_role"] = sub_role
+    profile["account_type"] = atype   # 四种账号类型（operator/carrier/opc/service）
+    profile["account_type_label"] = account_type_label(atype)
+    profile["role"] = role            # 端口角色(兼容守卫)
+    profile["sub_role"] = None        # 子角色已停用
     profile["org_id"] = org_id
     profile["region_id"] = region_id
-    profile["permissions"] = await db.roles.permissions_for(role, sub_role)
+    profile["permissions"] = await db.roles.permissions_for(permission_role(atype), None)
     profile["scope_region_ids"] = await db.regions.visible_region_ids(region_id)
     if identity:
         profile["identity_id"] = identity["id"]
diff --git a/app/domain/account_types.py b/app/domain/account_types.py
new file mode 100644
index 0000000..6d9c9d8
--- /dev/null
+++ b/app/domain/account_types.py
@@ -0,0 +1,50 @@
+# -*- coding: utf-8 -*-
+"""账号类型（唯一来源）—— 权限/身份逻辑集中于此，不分散。
+
+账号类型只四种：
+  operator  运营方   —— 平台运营
+  carrier   载体方   —— 创业载体/园区运营方
+  opc       OPC      —— 超级个体
+  service   服务方   —— 其余全部（服务商/甲方企业/政务/投资/开发…… 统一归服务方，
+                         为后期扩展 服务商/甲方企业 等预留）
+
+子角色（sub_role）已停用：权限一律按账号类型解析，不再读子角色。
+端口角色(role, 如 opc_member/provider/enterprise...) 仅作内部路由守卫兼容，
+对外暴露/鉴权的「账号类型」统一用本模块。
+"""
+from __future__ import annotations
+
+ACCOUNT_TYPES = ("operator", "carrier", "opc", "service")
+
+
+def account_type(role: str | None) -> str:
+    """把任意(端口)角色归一为四种账号类型之一。非运营/非OPC → service。"""
+    r = (role or "").strip().lower()
+    if r in ("operator", "operator_internal", "op_admin", "admin"):
+        return "operator"
+    if r in ("carrier", "park", "park_staff", "carrier_staff"):
+        return "carrier"
+    if r in ("opc_member", "opc", "opc_certified", "opc_independent"):
+        return "opc"
+    # provider / enterprise / government / investor / ... 全部归 服务方
+    return "service"
+
+
+def permission_role(atype: str) -> str:
+    """账号类型 → 用于查权限表( roles/<code> )的角色码。service 用 provider 基座。"""
+    return {
+        "operator": "operator",
+        "carrier": "carrier",
+        "opc": "opc_member",
+        "service": "provider",
+    }.get(atype, "provider")
+
+
+def label(atype: str) -> str:
+    """账号类型中文展示名。"""
+    return {
+        "operator": "运营方",
+        "carrier": "载体方",
+        "opc": "OPC",
+        "service": "服务方",
+    }.get(atype, "服务方")