diff --git a/tests/Feature/AdminPlatformOrderShowMarkPaidAndActivateButtonDisabledWhenReceiptMismatchTest.php b/tests/Feature/AdminPlatformOrderShowMarkPaidAndActivateButtonDisabledWhenReceiptMismatchTest.php
new file mode 100644
index 0000000..8fae68a
--- /dev/null
+++ b/tests/Feature/AdminPlatformOrderShowMarkPaidAndActivateButtonDisabledWhenReceiptMismatchTest.php
@@ -0,0 +1,86 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Models\Merchant;
+use App\Models\Plan;
+use App\Models\PlatformOrder;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminPlatformOrderShowMarkPaidAndActivateButtonDisabledWhenReceiptMismatchTest extends TestCase
+{
+    use RefreshDatabase;
+
+    protected function loginAsPlatformAdmin(): void
+    {
+        $this->seed();
+
+        $this->post('/admin/login', [
+            'email' => 'platform.admin@demo.local',
+            'password' => 'Platform@123456',
+        ])->assertRedirect('/admin');
+    }
+
+    public function test_mark_paid_and_activate_button_should_be_disabled_when_receipt_total_mismatched(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $merchant = Merchant::query()->firstOrFail();
+        $plan = Plan::query()->create([
+            'code' => 'po_show_disable_bmpa_receipt_mismatch_plan',
+            'name' => '订单详情禁用BMPA-回执差额测试套餐',
+            'billing_cycle' => 'monthly',
+            'price' => 10,
+            'list_price' => 10,
+            'status' => 'active',
+            'sort' => 10,
+            'published_at' => now(),
+        ]);
+
+        // payable=10，但回执总额=9（且 >0），会命中 markPaidBlockedByReceiptMismatch
+        $order = PlatformOrder::query()->create([
+            'merchant_id' => $merchant->id,
+            'plan_id' => $plan->id,
+            'order_no' => 'PO_SHOW_DISABLE_BMPA_RCPT_MIS_0001',
+            'order_type' => 'new_purchase',
+            'status' => 'pending',
+            'payment_status' => 'unpaid',
+            'plan_name' => $plan->name,
+            'billing_cycle' => $plan->billing_cycle,
+            'period_months' => 1,
+            'quantity' => 1,
+            'payable_amount' => 10,
+            'paid_amount' => 0,
+            'placed_at' => now(),
+            'meta' => [
+                'payment_receipts' => [
+                    [
+                        'type' => 'bank_transfer',
+                        'channel' => 'offline',
+                        'amount' => 9,
+                        'paid_at' => now()->toDateTimeString(),
+                        'note' => 'test-pay',
+                        'created_at' => now()->toDateTimeString(),
+                        'admin_id' => 1,
+                    ],
+                ],
+                'payment_summary' => [
+                    'count' => 1,
+                    'total_amount' => 9,
+                    'last_at' => now()->toDateTimeString(),
+                    'last_amount' => 9,
+                    'last_channel' => 'offline',
+                ],
+            ],
+        ]);
+
+        $res = $this->get('/admin/platform-orders/' . $order->id);
+        $res->assertOk();
+
+        $res->assertSee('action="/admin/platform-orders/' . $order->id . '/mark-paid-and-activate"', false);
+        $res->assertSee('标记支付并生效', false);
+        $res->assertSee('disabled', false);
+        $res->assertSee('回执总额与订单金额不一致', false);
+    }
+}