diff --git a/backend/app/core/tplus_db.py b/backend/app/core/tplus_db.py
index 696be1a..1073ee2 100644
--- a/backend/app/core/tplus_db.py
+++ b/backend/app/core/tplus_db.py
@@ -43,8 +43,11 @@ def resolve_tplus_settings(settings: Settings) -> Settings:
             config = _ConnectionFile.model_validate(
                 json.loads(path.read_text(encoding="utf-8-sig"))
             )
-        except (OSError, ValueError, ValidationError):
-            raise RuntimeError("T+ 只读连接文件不可用或字段不正确") from None
+        except OSError:
+            # 消息只区分故障类别，不回显路径内容；路径本身可在应用配置中核对。
+            raise RuntimeError("T+ 只读连接文件不存在或不可读") from None
+        except (ValueError, ValidationError):
+            raise RuntimeError("T+ 只读连接文件字段不正确") from None
         values = {
             "t_plus_" + key: getattr(config, key) for key in ("host", "port", "database", "user")
         }