diff --git a/app/Http/Controllers/Admin/StatisticsController.php b/app/Http/Controllers/Admin/StatisticsController.php
index 52add5f..8fd33dd 100755
--- a/app/Http/Controllers/Admin/StatisticsController.php
+++ b/app/Http/Controllers/Admin/StatisticsController.php
@@ -491,20 +491,21 @@ class StatisticsController extends CommonController
             ->get();
 
         // 3. 按「真实价格」去重生成表头列（xx元/天），并取一条样本数据上的因子名称作为小字说明
+        //    使用 groupBy('total')，避免闭包分组可能导致的 array_key_exists 问题
         $columns = $orderItems
-            ->groupBy(function ($item) {
-                return (float) $item->total; // 以真实 total 作为价格分组键
-            })
-            ->map(function ($group) {
+            ->groupBy('total')
+            ->map(function ($group, $total) {
                 /** @var OrderItems $sample */
                 $sample = $group->first();
-                $price = (float) $sample->total;
+                $price = (float) $total;
 
                 $factor_item_name = '';
-                $factors = json_decode($sample->factors, true) ?: [];
-                if (!empty($factors)) {
-                    // 取第一条因子作为说明文本（前端展示不变：价格 + 小字）
-                    $factor_item_name = $factors[0]['factor_item_name'] ?? '';
+                if ($sample && $sample->factors) {
+                    $factors = json_decode($sample->factors, true) ?: [];
+                    if (!empty($factors)) {
+                        // 取第一条因子作为说明文本（前端展示不变：价格 + 小字）
+                        $factor_item_name = $factors[0]['factor_item_name'] ?? '';
+                    }
                 }
 
                 return [