diff --git a/src/main/java/com/delivery/project/document/domain/dto/DeliveryOrderStatQuery.java b/src/main/java/com/delivery/project/document/domain/dto/DeliveryOrderStatQuery.java
index a56fbd3..8b797d3 100644
--- a/src/main/java/com/delivery/project/document/domain/dto/DeliveryOrderStatQuery.java
+++ b/src/main/java/com/delivery/project/document/domain/dto/DeliveryOrderStatQuery.java
@@ -27,7 +27,7 @@ public class DeliveryOrderStatQuery {
     private List<String> orderStatusList;
 
     /** 车辆类型ID */
-    private Long vehicleTypeId;
+    private String vehicleTypeId;
 
     /** 车牌号（可选，用于后续扩展） */
     private String plateNo;
diff --git a/src/main/java/com/delivery/project/document/domain/vo/DeliveryVehicleTypeStatVO.java b/src/main/java/com/delivery/project/document/domain/vo/DeliveryVehicleTypeStatVO.java
index 8dcd2a1..ace57d8 100644
--- a/src/main/java/com/delivery/project/document/domain/vo/DeliveryVehicleTypeStatVO.java
+++ b/src/main/java/com/delivery/project/document/domain/vo/DeliveryVehicleTypeStatVO.java
@@ -11,7 +11,7 @@ import java.math.BigDecimal;
 public class DeliveryVehicleTypeStatVO {
 
     /** 车辆类型ID */
-    private Long vehicleTypeId;
+    private String vehicleTypeId;
 
     /** 车辆类型名称 */
     private String vehicleTypeName;