diff --git a/app/command/HesuGoogleWhatsAppImportCommand.php b/app/command/HesuGoogleWhatsAppImportCommand.php
index ed818e9..0e2e22f 100644
--- a/app/command/HesuGoogleWhatsAppImportCommand.php
+++ b/app/command/HesuGoogleWhatsAppImportCommand.php
@@ -149,7 +149,7 @@ class HesuGoogleWhatsAppImportCommand extends Command
         if (!is_file($path)) {
             return null;
         }
-        $mainDir = getenv('OSS_MAIN_DIR') ?: 'x_server';
+        $mainDir = rtrim((string)(getenv('OSS_MAIN_DIR') ?: 'x_server'), '/');
         $key = $mainDir . '/crm_whatsapp/' . basename($filename);
         try {
             (new OssService())->uploadImage($path, $key); // 返回带签名的临时URL，这里只关心落 OSS 的对象键