diff --git a/internal/service/client_order/payment_provider.go b/internal/service/client_order/payment_provider.go
index 472a475..50a16b1 100644
--- a/internal/service/client_order/payment_provider.go
+++ b/internal/service/client_order/payment_provider.go
@@ -139,20 +139,32 @@ func buildClientPayConfigFromResult(result *PaymentResult) *dto.ClientPayConfig
 }
 
 // extractPaymentResult 从微信 SDK 的 map 配置中提取统一支付参数。
+// 支持两种类型：
+// - map[string]any：V1 标准微信 SDK（PowerWeChat）返回
+// - map[string]string：V2 自建实现返回
 func extractPaymentResult(payConfig any) *PaymentResult {
-	configMap, _ := payConfig.(map[string]any)
-	if configMap == nil {
-		configMap = map[string]any{}
+	if configMap, ok := payConfig.(map[string]any); ok {
+		return &PaymentResult{
+			AppID:     payFirstNonEmpty(payStringFromAny(configMap["appId"])),
+			TimeStamp: payFirstNonEmpty(payStringFromAny(configMap["timeStamp"]), payStringFromAny(configMap["timestamp"])),
+			NonceStr:  payStringFromAny(configMap["nonceStr"]),
+			Package:   payStringFromAny(configMap["package"]),
+			SignType:  payStringFromAny(configMap["signType"]),
+			PaySign:   payStringFromAny(configMap["paySign"]),
+		}
 	}
-
-	return &PaymentResult{
-		AppID:     payFirstNonEmpty(payStringFromAny(configMap["appId"])),
-		TimeStamp: payFirstNonEmpty(payStringFromAny(configMap["timeStamp"]), payStringFromAny(configMap["timestamp"])),
-		NonceStr:  payStringFromAny(configMap["nonceStr"]),
-		Package:   payStringFromAny(configMap["package"]),
-		SignType:  payStringFromAny(configMap["signType"]),
-		PaySign:   payStringFromAny(configMap["paySign"]),
+	// V2 自建实现返回 map[string]string，原 map[string]any 断言会失败导致字段全空
+	if configMap, ok := payConfig.(map[string]string); ok {
+		return &PaymentResult{
+			AppID:     configMap["appId"],
+			TimeStamp: payFirstNonEmpty(configMap["timeStamp"], configMap["timestamp"]),
+			NonceStr:  configMap["nonceStr"],
+			Package:   configMap["package"],
+			SignType:  configMap["signType"],
+			PaySign:   configMap["paySign"],
+		}
 	}
+	return &PaymentResult{}
 }
 
 func payStringFromAny(value any) string {