diff --git a/backend/app/service/FeishuNotificationService.php b/backend/app/service/FeishuNotificationService.php
index ad6817c..c261bf2 100644
--- a/backend/app/service/FeishuNotificationService.php
+++ b/backend/app/service/FeishuNotificationService.php
@@ -563,9 +563,6 @@ class FeishuNotificationService
             $app = $this->getAppConfig();
             $token = $this->getAccessToken();
 
-            // 使用 JSON_UNESCAPED_UNICODE 避免 emoji 被转义
-            $content = json_encode(['card' => $card], JSON_UNESCAPED_UNICODE);
-
             error_log('📤 发送飞书消息: app_id=' . $app['app_id'] . ', feishu_user_id=' . $feishuUserId);
             error_log('📦 消息卡片: ' . json_encode($card, JSON_UNESCAPED_UNICODE));
 
@@ -574,7 +571,7 @@ class FeishuNotificationService
                 [
                     'receive_id' => $feishuUserId,
                     'msg_type' => 'interactive',
-                    'content' => $content,
+                    'content' => ['card' => $card],  // 直接传递数组，让 HttpClient 进行编码
                 ],
                 [
                     'Authorization: Bearer ' . $token,
@@ -714,8 +711,8 @@ class FeishuNotificationService
                         "https://open.feishu.cn/open-apis/im/v1/messages/{$message->message_id}/update",
                         [
                             'msg_type' => 'interactive',
-                            // 使用 JSON_UNESCAPED_UNICODE 避免 emoji 被转义
-                            'content' => json_encode(['card' => $updatedCard], JSON_UNESCAPED_UNICODE),
+                            // 直接传递数组，让 HttpClient 进行编码
+                            'content' => ['card' => $updatedCard],
                         ],
                         [
                             'Authorization: Bearer ' . $token,
diff --git a/backend/app/util/HttpClient.php b/backend/app/util/HttpClient.php
index 1454408..d513404 100644
--- a/backend/app/util/HttpClient.php
+++ b/backend/app/util/HttpClient.php
@@ -88,7 +88,8 @@ class HttpClient
 
         curl_setopt($ch, CURLOPT_URL, $url);
         curl_setopt($ch, CURLOPT_POST, true);
-        curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));
+        // 使用 JSON_UNESCAPED_UNICODE 避免 emoji 被转义
+        curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data, JSON_UNESCAPED_UNICODE));
         curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
         curl_setopt($ch, CURLOPT_TIMEOUT, $timeout ?: self::$defaultTimeout);
         curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);