diff --git a/backend/internal/api/upload.go b/backend/internal/api/upload.go
index 68fae63..569f7dd 100644
--- a/backend/internal/api/upload.go
+++ b/backend/internal/api/upload.go
@@ -382,20 +382,21 @@ func fetchAccountID(token string) (string, error) {
 		return "", fmt.Errorf("解析响应失败: %v", err)
 	}
 
-	// 优先查找 plan_type 包含 "team" 的账户
-	for key, acc := range result.Accounts {
-		if key == "default" {
+	// 优先查找 plan_type 为 "team" 的账户
+	// 注意：account_id 是 map 的 key，而不是 Account.ID 字段
+	for accountID, info := range result.Accounts {
+		if accountID == "default" {
 			continue
 		}
-		if strings.Contains(strings.ToLower(acc.Account.PlanType), "team") {
-			return acc.Account.ID, nil
+		if strings.Contains(strings.ToLower(info.Account.PlanType), "team") {
+			return accountID, nil
 		}
 	}
 
-	// 否则取第一个非 "default" 的账户 ID
-	for key, acc := range result.Accounts {
-		if key != "default" && acc.Account.ID != "" {
-			return acc.Account.ID, nil
+	// 否则取第一个非 "default" 的账户
+	for accountID := range result.Accounts {
+		if accountID != "default" {
+			return accountID, nil
 		}
 	}