diff --git a/resources/views/admin/platform_orders/show.blade.php b/resources/views/admin/platform_orders/show.blade.php
index cbc1cf6..96ccdcc 100644
--- a/resources/views/admin/platform_orders/show.blade.php
+++ b/resources/views/admin/platform_orders/show.blade.php
@@ -744,7 +744,8 @@
             $syncFailedListUrl = $makePlatformOrderIndexUrl(['sync_status' => 'failed']);
 
             // 避免 URL 过长/特殊字符破坏 query：失败原因过长时不生成 keyword 链接
-            $SYNC_REASON_KEYWORD_MAX_LEN = 80;
+            // 与列表页/仪表盘保持一致：由 config 统一控制阈值。
+            $SYNC_REASON_KEYWORD_MAX_LEN = (int) config('saasshop.platform_orders.sync_error_keyword_link_max_len', 200);
             $syncReasonUrl = '';
             if ($syncMsg !== '' && mb_strlen($syncMsg) <= $SYNC_REASON_KEYWORD_MAX_LEN) {
                 $syncReasonUrl = $makePlatformOrderIndexUrl([
@@ -794,7 +795,8 @@
             $bmpaListUrl = $makePlatformOrderIndexUrl(['bmpa_failed_only' => '1']);
 
             // 避免 URL 过长/特殊字符破坏 query：失败原因过长时不生成 keyword 链接
-            $BMPA_REASON_KEYWORD_MAX_LEN = 80;
+            // 与列表页/仪表盘保持一致：由 config 统一控制阈值。
+            $BMPA_REASON_KEYWORD_MAX_LEN = (int) config('saasshop.platform_orders.sync_error_keyword_link_max_len', 200);
             $bmpaReasonUrl = '';
             if ($bmpaMsg !== '' && mb_strlen($bmpaMsg) <= $BMPA_REASON_KEYWORD_MAX_LEN) {
                 $bmpaReasonUrl = $makePlatformOrderIndexUrl([
diff --git a/tests/Feature/AdminPlatformOrderShowFailedReasonKeywordMaxLenShouldUseConfigTest.php b/tests/Feature/AdminPlatformOrderShowFailedReasonKeywordMaxLenShouldUseConfigTest.php
new file mode 100644
index 0000000..941b05a
--- /dev/null
+++ b/tests/Feature/AdminPlatformOrderShowFailedReasonKeywordMaxLenShouldUseConfigTest.php
@@ -0,0 +1,78 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Models\Admin;
+use App\Models\Merchant;
+use App\Models\Plan;
+use App\Models\PlatformOrder;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminPlatformOrderShowFailedReasonKeywordMaxLenShouldUseConfigTest 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_platform_order_show_failed_reason_keyword_max_len_should_use_config(): void
+    {
+        // 将阈值设为 5：len=5 应生成同原因链接，len=6 不生成
+        config()->set('saasshop.platform_orders.sync_error_keyword_link_max_len', 5);
+
+        $this->loginAsPlatformAdmin();
+
+        $merchantId = (int) Merchant::query()->value('id');
+        $platformAdminId = (int) Admin::query()->where('email', 'platform.admin@demo.local')->value('id');
+
+        $plan = Plan::query()->create([
+            'code' => 'show_failed_reason_max_len_plan',
+            'name' => '订单详情原因阈值配置测试套餐',
+            'billing_cycle' => 'monthly',
+            'price' => 10,
+            'list_price' => 10,
+            'status' => 'active',
+            'sort' => 10,
+            'published_at' => now(),
+        ]);
+
+        $okMsg = '12345';
+        $longMsg = '123456';
+
+        $order = PlatformOrder::query()->create([
+            'merchant_id' => $merchantId,
+            'plan_id' => $plan->id,
+            'site_subscription_id' => null,
+            'created_by_admin_id' => $platformAdminId ?: null,
+            'order_no' => 'PO_SHOW_FAILED_REASON_MAX_LEN_0001',
+            'order_type' => 'new_purchase',
+            'status' => 'pending',
+            'payment_status' => 'paid',
+            'payable_amount' => 10,
+            'paid_amount' => 10,
+            'meta' => [
+                'subscription_activation_error' => ['message' => $okMsg, 'at' => now()->toDateTimeString()],
+                'batch_mark_paid_and_activate_error' => ['message' => $longMsg, 'at' => now()->toDateTimeString()],
+            ],
+        ]);
+
+        $res = $this->get('/admin/platform-orders/' . $order->id);
+        $res->assertOk();
+
+        // 同步失败：len=5 应有同原因链接
+        $res->assertSee('查看同原因失败订单', false);
+        $res->assertSee('sync_error_keyword=' . $okMsg, false);
+
+        // BMPA：len=6 不应生成 keyword 链接（应出现“原因过长”提示）
+        $res->assertSee('原因过长', false);
+        $res->assertDontSee('bmpa_error_keyword=' . $longMsg, false);
+    }
+}