diff --git a/client/android/app/src/main/AndroidManifest.xml b/client/android/app/src/main/AndroidManifest.xml
index 2a81d58..ba725ae 100644
--- a/client/android/app/src/main/AndroidManifest.xml
+++ b/client/android/app/src/main/AndroidManifest.xml
@@ -29,6 +29,28 @@
     -->
     <uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />
 
+    <!--
+      Android 11+ (API 30) 包可见性:不声明 <queries> 时 canLaunchUrl / launchUrl
+      对 https 及自定义 scheme 会被系统判为「无可处理应用」→ 支付页「打开支付宝」拉起
+      收银台 https 页被误判无法打开(报 openAlipayFailed)。声明浏览器(http/https VIEW)
+      + 支付宝 scheme/包,让拉起收银台页(→ 扫码/打开支付宝)正常工作。
+    -->
+    <queries>
+        <intent>
+            <action android:name="android.intent.action.VIEW" />
+            <data android:scheme="https" />
+        </intent>
+        <intent>
+            <action android:name="android.intent.action.VIEW" />
+            <data android:scheme="http" />
+        </intent>
+        <intent>
+            <action android:name="android.intent.action.VIEW" />
+            <data android:scheme="alipays" />
+        </intent>
+        <package android:name="com.eg.android.AlipayGphone" />
+    </queries>
+
     <application
         android:label="穿山甲"
         android:name="${applicationName}"
diff --git a/client/lib/screens/payment_page.dart b/client/lib/screens/payment_page.dart
index 04637f9..5678b17 100644
--- a/client/lib/screens/payment_page.dart
+++ b/client/lib/screens/payment_page.dart
@@ -81,21 +81,21 @@ class _PaymentScreenState extends ConsumerState<PaymentScreen> {
   // 而非静默无反应。
   Future<void> _openRedirectUrl(BuildContext context, String url) async {
     final uri = Uri.tryParse(url);
-    if (uri == null) {
+    if (uri == null || url.isEmpty) {
       if (context.mounted) showPangolinToast(context, t.openAlipayFailed);
       return;
     }
+    // payload.url 是收银台 https 页(二维码 + 打开支付宝 + 轮询),不是裸 alipays 深链。
+    // 不用 canLaunchUrl 预判:Android 11+ 包可见性下它对 https 常误判 false(即本次
+    // 「couldn't open ali」根因)。直接试:外部浏览器/支付宝 → 失败退 app 内浏览视图
+    // (Custom Tab/WebView,收银台页在 app 内显示,没装支付宝也能扫码/走 H5)。
     try {
-      final can = await canLaunchUrl(uri);
-      if (!can) {
-        if (context.mounted) showPangolinToast(context, t.openAlipayFailed);
-        return;
-      }
-      final ok = await launchUrl(uri, mode: LaunchMode.externalApplication);
-      if (!ok && context.mounted) showPangolinToast(context, t.openAlipayFailed);
-    } catch (_) {
-      if (context.mounted) showPangolinToast(context, t.openAlipayFailed);
-    }
+      if (await launchUrl(uri, mode: LaunchMode.externalApplication)) return;
+    } catch (_) {}
+    try {
+      if (await launchUrl(uri, mode: LaunchMode.inAppBrowserView)) return;
+    } catch (_) {}
+    if (context.mounted) showPangolinToast(context, t.openAlipayFailed);
   }
 
   // 卡片配方 = account_page.dart::_Card(真相源既有样式,非新造)。