diff --git a/app/Http/Controllers/Admin/PlatformOrderController.php b/app/Http/Controllers/Admin/PlatformOrderController.php
index d7223c4..cce4411 100644
--- a/app/Http/Controllers/Admin/PlatformOrderController.php
+++ b/app/Http/Controllers/Admin/PlatformOrderController.php
@@ -353,9 +353,21 @@ class PlatformOrderController extends Controller
         try {
             $subscription = $service->activateOrder($order->id, $admin->id);
 
-            // 同步成功：清理失败记录（若存在）
+            // 同步成功：清理失败记录（若存在）+ 写入审计记录
             $meta = (array) ($order->meta ?? []);
             data_forget($meta, 'subscription_activation_error');
+
+            $audit = (array) (data_get($meta, 'audit', []) ?? []);
+            $audit[] = [
+                'action' => 'activate_subscription',
+                'scope' => 'single',
+                'at' => now()->toDateTimeString(),
+                'admin_id' => $admin->id,
+                'subscription_id' => $subscription->id,
+                'note' => '手动点击订单详情【同步订阅】',
+            ];
+            data_set($meta, 'audit', $audit);
+
             $order->meta = $meta;
             $order->save();
         } catch (\Throwable $e) {
diff --git a/resources/views/admin/platform_orders/show.blade.php b/resources/views/admin/platform_orders/show.blade.php
index 1e422f4..f4ae45c 100644
--- a/resources/views/admin/platform_orders/show.blade.php
+++ b/resources/views/admin/platform_orders/show.blade.php
@@ -345,6 +345,7 @@
                 'batch_activate_subscription' => '批量同步订阅',
                 'mark_activated' => '仅标记为已生效',
                 'batch_mark_activated' => '批量仅标记为已生效',
+                'activate_subscription' => '同步订阅',
             ];
         @endphp
         <table>
diff --git a/tests/Feature/AdminPlatformOrderActivateSubscriptionAuditTest.php b/tests/Feature/AdminPlatformOrderActivateSubscriptionAuditTest.php
new file mode 100644
index 0000000..7c67b3e
--- /dev/null
+++ b/tests/Feature/AdminPlatformOrderActivateSubscriptionAuditTest.php
@@ -0,0 +1,74 @@
+<?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 AdminPlatformOrderActivateSubscriptionAuditTest 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_activate_subscription_will_append_audit_record(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $merchant = Merchant::query()->firstOrFail();
+        $plan = Plan::query()->create([
+            'code' => 'activate_audit_test',
+            'name' => '同步订阅审计测试',
+            'billing_cycle' => 'monthly',
+            'price' => 66,
+            'list_price' => 66,
+            'status' => 'active',
+            'sort' => 10,
+            'published_at' => now(),
+        ]);
+
+        $order = PlatformOrder::query()->create([
+            'merchant_id' => $merchant->id,
+            'plan_id' => $plan->id,
+            'order_no' => 'PO_ACT_AUDIT_0001',
+            'order_type' => 'new_purchase',
+            'status' => 'activated',
+            'payment_status' => 'paid',
+            'plan_name' => $plan->name,
+            'billing_cycle' => $plan->billing_cycle,
+            'period_months' => 1,
+            'quantity' => 1,
+            'payable_amount' => 66,
+            'paid_amount' => 66,
+            'placed_at' => now()->subMinutes(10),
+            'paid_at' => now()->subMinutes(5),
+            'activated_at' => now()->subMinutes(1),
+        ]);
+
+        $this->post('/admin/platform-orders/' . $order->id . '/activate-subscription')
+            ->assertRedirect();
+
+        $order->refresh();
+
+        $audit = (array) (data_get($order->meta, 'audit', []) ?? []);
+        $this->assertNotEmpty($audit);
+
+        $last = end($audit);
+        $this->assertSame('activate_subscription', data_get($last, 'action'));
+        $this->assertSame('single', data_get($last, 'scope'));
+        $this->assertNotEmpty(data_get($last, 'at'));
+        $this->assertNotEmpty(data_get($last, 'admin_id'));
+        $this->assertNotEmpty(data_get($last, 'subscription_id'));
+    }
+}