diff --git a/resources/views/admin/platform_orders/index.blade.php b/resources/views/admin/platform_orders/index.blade.php
index c8514fc..25ade77 100644
--- a/resources/views/admin/platform_orders/index.blade.php
+++ b/resources/views/admin/platform_orders/index.blade.php
@@ -239,12 +239,21 @@
         @if(count($failedReasonStats) > 0)
             <div class="muted mt-6">
                 @foreach($failedReasonStats as $item)
-                    @php $reason = (string) ($item['reason'] ?? ''); @endphp
+                    @php
+                        $reason = (string) ($item['reason'] ?? '');
+                        $count = (int) ($item['count'] ?? 0);
+                    @endphp
                     <div>
-                        <a class="link" href="{!! request()->fullUrlWithQuery(['sync_error_keyword' => $reason, 'sync_status' => 'failed', 'page' => null]) !!}">{{ $reason }}</a>
-                        <span class="muted">（{{ $item['count'] }}）</span>
-                        <span class="muted">｜</span>
-                        <a class="link" href="{!! request()->fullUrlWithQuery(['sync_error_keyword' => $reason, 'sync_status' => null, 'syncable_only' => '1', 'page' => null]) !!}">切到可同步重试</a>
+                        @if($reason !== '')
+                            @php $reasonText = mb_substr($reason, 0, 60); @endphp
+                            <a class="link" title="{{ $reason }}" href="{!! request()->fullUrlWithQuery(['sync_error_keyword' => $reason, 'sync_status' => 'failed', 'page' => null]) !!}">{{ $reasonText }}</a>
+                            <span class="muted">（{{ $count }}）</span>
+                            <span class="muted">｜</span>
+                            <a class="link" href="{!! request()->fullUrlWithQuery(['sync_error_keyword' => $reason, 'sync_status' => null, 'syncable_only' => '1', 'page' => null]) !!}">切到可同步重试</a>
+                        @else
+                            <span class="muted">（空原因）</span>
+                            <span class="muted">（{{ $count }}）</span>
+                        @endif
                     </div>
                 @endforeach
             </div>
diff --git a/tests/Feature/AdminPlatformOrderSyncFailedReasonTop5UrlEncodingTest.php b/tests/Feature/AdminPlatformOrderSyncFailedReasonTop5UrlEncodingTest.php
new file mode 100644
index 0000000..1da9700
--- /dev/null
+++ b/tests/Feature/AdminPlatformOrderSyncFailedReasonTop5UrlEncodingTest.php
@@ -0,0 +1,82 @@
+<?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 AdminPlatformOrderSyncFailedReasonTop5UrlEncodingTest 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_sync_failed_reason_top5_links_url_encode_reason(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $merchant = Merchant::query()->firstOrFail();
+        $plan = Plan::query()->create([
+            'code' => 'sync_failed_reason_top5_url_encode_test',
+            'name' => '同步失败原因URL编码测试套餐',
+            'billing_cycle' => 'monthly',
+            'price' => 10,
+            'list_price' => 10,
+            'status' => 'active',
+            'sort' => 10,
+            'published_at' => now(),
+        ]);
+
+        $reason = 'A&B=1 中文';
+
+        PlatformOrder::query()->create([
+            'merchant_id' => $merchant->id,
+            'plan_id' => $plan->id,
+            'order_no' => 'PO_SYNC_FAILED_REASON_ENCODE_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' => 10,
+            'paid_amount' => 10,
+            'placed_at' => now(),
+            'paid_at' => now(),
+            'activated_at' => now(),
+            'meta' => [
+                'subscription_activation_error' => [
+                    'message' => $reason,
+                    'at' => now()->toDateTimeString(),
+                    'admin_id' => 1,
+                ],
+            ],
+        ]);
+
+        // RFC3986 编码：& -> %26，= -> %3D，空格 -> %20
+        $encoded = 'A%26B%3D1%20%E4%B8%AD%E6%96%87';
+
+        $page = $this->get('/admin/platform-orders');
+        $page->assertOk();
+
+        $page->assertSee('sync_status=failed', false);
+        $page->assertSee('sync_error_keyword=' . $encoded, false);
+
+        // retry link 也应包含同一编码，并包含 syncable_only=1
+        $page->assertSee('切到可同步重试', false);
+        $page->assertSee('syncable_only=1', false);
+        $page->assertSee('sync_error_keyword=' . $encoded, false);
+    }
+}