diff --git a/resources/views/business/pages/partials/directory-table.blade.php b/resources/views/business/pages/partials/directory-table.blade.php
index cff8850e..10bdc0bf 100644
--- a/resources/views/business/pages/partials/directory-table.blade.php
+++ b/resources/views/business/pages/partials/directory-table.blade.php
@@ -1553,6 +1553,7 @@
                     <table class="receipt-metric-table">
                         <thead>
                             <tr>
+                                <th scope="col">平台</th>
                                 <th scope="col">账单名称</th>
                                 <th scope="col" class="is-number">总金额</th>
                             </tr>
@@ -1584,7 +1585,7 @@
                 </section>
             </div>
             <div class="receipt-metric-dialog__foot">
-                <span data-receipt-metric-count>共 0 个账单名称</span>
+                <span data-receipt-metric-count>共 0 条平台账单汇总</span>
             </div>
         </dialog>
 
@@ -2347,7 +2348,7 @@
                         title.textContent = label + ' · 明细汇总';
                         subtitle.textContent = '按平台、店铺和账单名称汇总';
                         currentTotalEl.textContent = '…';
-                        countEl.textContent = '正在读取账单名称';
+                        countEl.textContent = '正在读取平台账单汇总';
                         dialog.setAttribute('aria-busy', 'true');
                     }
 
@@ -2384,6 +2385,9 @@
                         summaryRowsEl.replaceChildren();
                         rows.forEach(function (row) {
                             var tr = document.createElement('tr');
+                            var platform = document.createElement('td');
+                            platform.textContent = row.platform || '—';
+                            tr.appendChild(platform);
                             var billItem = document.createElement('td');
                             billItem.textContent = row.bill_item || '未命名账单项目';
                             tr.appendChild(billItem);
@@ -2414,7 +2418,7 @@
 
                     function updateFooterCount() {
                         countEl.textContent = activeTab === 'summary'
-                            ? '共 ' + summaryCount.toLocaleString('zh-CN') + ' 个账单名称'
+                            ? '共 ' + summaryCount.toLocaleString('zh-CN') + ' 条平台账单汇总'
                             : '共 ' + detailCount.toLocaleString('zh-CN') + ' 条平台店铺明细';
                     }
 
@@ -2438,15 +2442,25 @@
                                 && (!store || row.store_name === store)
                                 && (!billItem || row.bill_item === billItem);
                         });
-                        var totalsByBillItem = {};
+                        var totalsByPlatformBillItem = {};
                         rows.forEach(function (row) {
+                            var platform = row.platform || '—';
                             var name = row.bill_item || '未命名账单项目';
-                            totalsByBillItem[name] = (totalsByBillItem[name] || 0) + Number(row.amount || 0);
+                            var key = JSON.stringify([platform, name]);
+                            if (!totalsByPlatformBillItem[key]) {
+                                totalsByPlatformBillItem[key] = {
+                                    platform: platform,
+                                    bill_item: name,
+                                    amount: 0
+                                };
+                            }
+                            totalsByPlatformBillItem[key].amount += Number(row.amount || 0);
                         });
-                        var summaryRows = Object.keys(totalsByBillItem).map(function (name) {
-                            return { bill_item: name, amount: totalsByBillItem[name] };
+                        var summaryRows = Object.keys(totalsByPlatformBillItem).map(function (key) {
+                            return totalsByPlatformBillItem[key];
                         }).sort(function (left, right) {
                             return Math.abs(right.amount) - Math.abs(left.amount)
+                                || left.platform.localeCompare(right.platform, 'zh-CN')
                                 || left.bill_item.localeCompare(right.bill_item, 'zh-CN');
                         });
                         var filteredTotal = summaryRows.reduce(function (sum, row) {
diff --git a/tests/Feature/Business/PerformanceDetailsMetricDetailsTest.php b/tests/Feature/Business/PerformanceDetailsMetricDetailsTest.php
index d3347b86..ebd5bb38 100644
--- a/tests/Feature/Business/PerformanceDetailsMetricDetailsTest.php
+++ b/tests/Feature/Business/PerformanceDetailsMetricDetailsTest.php
@@ -75,11 +75,53 @@ class PerformanceDetailsMetricDetailsTest extends FeatureTestCase
         ], $rows);
     }
 
-    private function row(string $rowKey, string $storeName, float $offset): array
+    public function test_same_bill_item_is_split_by_platform_for_summary(): void
+    {
+        $mirror = DB::connection('business_mirror');
+        $mirror->table('store_receipt_order_match_rows')->insert([
+            $this->row('row-jd', '京东店铺', -100, '京东账单'),
+            $this->row('row-pdd', '拼多多店铺', -50, '拼多多'),
+        ]);
+        $mirror->table('store_receipt_order_match_metric_details')->insert([
+            $this->detail('detail-jd', 'row-jd', '账单扣款', -100, '京东账单'),
+            $this->detail('detail-pdd', 'row-pdd', '账单扣款', -50, '拼多多'),
+        ]);
+
+        $response = $this->loginAs()->getJson(route(
+            'business.financial-operations.performance-details.metric-details',
+            [
+                'metric' => 'offset_amount',
+                'month' => '2026-09',
+            ],
+        ));
+
+        $response
+            ->assertOk()
+            ->assertJsonPath('total', -150)
+            ->assertJsonPath('detail_total', -150)
+            ->assertJsonPath('balanced', true);
+
+        $this->assertContains([
+            'platform' => '京东账单',
+            'store_name' => '京东店铺',
+            'bill_item' => '账单扣款',
+            'amount' => -100,
+            'line_count' => 1,
+        ], $response->json('rows'));
+        $this->assertContains([
+            'platform' => '拼多多',
+            'store_name' => '拼多多店铺',
+            'bill_item' => '账单扣款',
+            'amount' => -50,
+            'line_count' => 1,
+        ], $response->json('rows'));
+    }
+
+    private function row(string $rowKey, string $storeName, float $offset, string $platform = '京东账单'): array
     {
         return [
             'report_month' => '2026-09-01',
-            'platform' => '京东账单',
+            'platform' => $platform,
             'row_key' => $rowKey,
             'occurred_date' => '2026-09-01',
             'store_name' => $storeName,
@@ -100,13 +142,19 @@ class PerformanceDetailsMetricDetailsTest extends FeatureTestCase
         ];
     }
 
-    private function detail(string $detailKey, string $rowKey, string $billItem, float $amount): array
+    private function detail(
+        string $detailKey,
+        string $rowKey,
+        string $billItem,
+        float $amount,
+        string $platform = '京东账单'
+    ): array
     {
         return [
             'report_month' => '2026-09-01',
             'detail_key' => $detailKey,
             'row_key' => $rowKey,
-            'platform' => '京东账单',
+            'platform' => $platform,
             'metric' => 'offset',
             'bill_item' => $billItem,
             'amount' => $amount,