diff --git a/app/Services/ConfigService.php b/app/Services/ConfigService.php
index 5277437..4530186 100644
--- a/app/Services/ConfigService.php
+++ b/app/Services/ConfigService.php
@@ -803,7 +803,8 @@ class ConfigService
 
     /**
      * Hostname for WebOTP SMS (@domain #code) and other public links.
-     * Only from the current HTTP request — no settings, no .env.
+     * Prefer settings.app_url (دامنهٔ اپ کاربر) over the API request host —
+     * API often lives on a different subdomain (e.g. *.gholaktala.ir).
      */
     public function resolvePublicHost(?\Illuminate\Http\Request $request = null): string
     {
@@ -816,9 +817,14 @@ class ConfigService
         return '';
     }
 
-    /** Full user-facing site URL, e.g. https://example.ir */
+    /** Full user-facing site URL, e.g. https://example.ir — prefers settings.app_url */
     public function resolvePublicSiteUrl(?\Illuminate\Http\Request $request = null): string
     {
+        $fromAppUrl = $this->normalizedAppUrl();
+        if ($fromAppUrl !== '') {
+            return $fromAppUrl;
+        }
+
         if ($request !== null) {
             $origin = rtrim(trim((string) $request->getSchemeAndHttpHost()), '/');
             $host = $this->parseHostFromUrl($origin);
@@ -854,6 +860,11 @@ class ConfigService
     {
         $candidates = [];
 
+        $appUrlHost = $this->parseHostFromUrl((string) $this->get('app_url', ''));
+        if ($appUrlHost !== '') {
+            $candidates[] = $appUrlHost;
+        }
+
         if ($request !== null) {
             $candidates[] = trim((string) $request->getHost());
         }
@@ -865,6 +876,33 @@ class ConfigService
         return $candidates;
     }
 
+    /** settings.app_url as https://host… without trailing slash; empty if unusable */
+    private function normalizedAppUrl(): string
+    {
+        $raw = trim((string) $this->get('app_url', ''));
+        if ($raw === '') {
+            return '';
+        }
+
+        if (! preg_match('#^https?://#i', $raw)) {
+            $raw = 'https://' . ltrim($raw, '/');
+        }
+
+        $host = $this->parseHostFromUrl($raw);
+        if (! $this->isUsableHost($host)) {
+            return '';
+        }
+
+        $scheme = parse_url($raw, PHP_URL_SCHEME) ?: 'https';
+        $port = parse_url($raw, PHP_URL_PORT);
+        $origin = strtolower((string) $scheme) . '://' . $this->normalizeHost($host);
+        if ($port !== null && ! in_array((int) $port, [80, 443], true)) {
+            $origin .= ':' . $port;
+        }
+
+        return $origin;
+    }
+
     private function isUsableHost(string $host): bool
     {
         $host = strtolower(trim($host));
diff --git a/tests/Unit/ConfigServiceOtpHostTest.php b/tests/Unit/ConfigServiceOtpHostTest.php
index fad741a..5dfb004 100644
--- a/tests/Unit/ConfigServiceOtpHostTest.php
+++ b/tests/Unit/ConfigServiceOtpHostTest.php
@@ -4,16 +4,38 @@ namespace Tests\Unit;
 
 use App\Services\ConfigService;
 use Illuminate\Http\Request;
+use Mockery;
 use Tests\TestCase;
 
 class ConfigServiceOtpHostTest extends TestCase
 {
+    protected function tearDown(): void
+    {
+        Mockery::close();
+        parent::tearDown();
+    }
+
+    /** @param mixed $appUrl */
+    private function cfgWithAppUrl($appUrl): ConfigService
+    {
+        $cfg = Mockery::mock(ConfigService::class)->makePartial();
+        $cfg->shouldReceive('get')->andReturnUsing(function (string $key, $default = null) use ($appUrl) {
+            if ($key === 'app_url') {
+                return $appUrl !== null && $appUrl !== '' ? $appUrl : $default;
+            }
+
+            return $default;
+        });
+
+        return $cfg;
+    }
+
     public function test_uses_request_host_without_settings(): void
     {
         $request = Request::create('https://boursemes.com/server/auth/login', 'POST');
         $this->app->instance('request', $request);
 
-        $host = app(ConfigService::class)->resolvePublicHost($request);
+        $host = $this->cfgWithAppUrl(null)->resolvePublicHost($request);
 
         $this->assertSame('boursemes.com', $host);
     }
@@ -22,14 +44,35 @@ class ConfigServiceOtpHostTest extends TestCase
     {
         $request = Request::create('https://boursemes.com/server/auth/login', 'POST');
 
-        $url = app(ConfigService::class)->resolvePublicSiteUrl($request);
+        $url = $this->cfgWithAppUrl(null)->resolvePublicSiteUrl($request);
 
         $this->assertSame('https://boursemes.com', $url);
     }
 
+    public function test_prefers_app_url_over_api_request_host(): void
+    {
+        $request = Request::create('https://goldarvin.gholaktala.ir/server/customer/order', 'POST');
+        $this->app->instance('request', $request);
+
+        $cfg = $this->cfgWithAppUrl('https://my.goldarvin.ir');
+
+        $this->assertSame('my.goldarvin.ir', $cfg->resolvePublicHost($request));
+        $this->assertSame('https://my.goldarvin.ir', $cfg->resolvePublicSiteUrl($request));
+    }
+
+    public function test_app_url_without_scheme_gets_https(): void
+    {
+        $request = Request::create('https://goldarvin.gholaktala.ir/server/auth/login', 'POST');
+
+        $this->assertSame(
+            'https://my.goldarvin.ir',
+            $this->cfgWithAppUrl('my.goldarvin.ir')->resolvePublicSiteUrl($request)
+        );
+    }
+
     public function test_returns_empty_without_request(): void
     {
-        $host = app(ConfigService::class)->resolvePublicHost();
+        $host = $this->cfgWithAppUrl(null)->resolvePublicHost();
 
         $this->assertSame('', $host);
     }
@@ -38,7 +81,7 @@ class ConfigServiceOtpHostTest extends TestCase
     {
         $request = Request::create('https://www.boursemes.com/server/auth/login', 'POST');
 
-        $host = app(ConfigService::class)->resolvePublicHost($request);
+        $host = $this->cfgWithAppUrl(null)->resolvePublicHost($request);
 
         $this->assertSame('boursemes.com', $host);
     }
@@ -48,7 +91,7 @@ class ConfigServiceOtpHostTest extends TestCase
         $request = Request::create('http://localhost/server/auth/login', 'POST');
         $this->app->instance('request', $request);
 
-        $host = app(ConfigService::class)->resolvePublicHost($request);
+        $host = $this->cfgWithAppUrl(null)->resolvePublicHost($request);
 
         $this->assertSame('', $host);
     }