diff --git a/src/Snap.Hutao/Snap.Hutao/Core/CoreEnvironment.cs b/src/Snap.Hutao/Snap.Hutao/Core/CoreEnvironment.cs
index 1781289c..4684dc78 100644
--- a/src/Snap.Hutao/Snap.Hutao/Core/CoreEnvironment.cs
+++ b/src/Snap.Hutao/Snap.Hutao/Core/CoreEnvironment.cs
@@ -29,6 +29,11 @@ internal static class CoreEnvironment
     /// </summary>
     public const string HoyolabMobileUA = $"Mozilla/5.0 (Linux; Android 12) Mobile miHoYoBBS/{HoyolabXrpcVersion}";
 
+    /// <summary>
+    /// Hoyolab iPhone 移动端请求UA
+    /// </summary>
+    public const string HoyolabOsMobileUA = "Mozilla/5.0 (iPhone; CPU iPhone OS 16_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) miHoYoBBSOversea/2.28.0";
+
     /// <summary>
     /// 米游社 Rpc 版本
     /// </summary>
diff --git a/src/Snap.Hutao/Snap.Hutao/Model/Binding/User/User.cs b/src/Snap.Hutao/Snap.Hutao/Model/Binding/User/User.cs
index b82c61fc..784ff099 100644
--- a/src/Snap.Hutao/Snap.Hutao/Model/Binding/User/User.cs
+++ b/src/Snap.Hutao/Snap.Hutao/Model/Binding/User/User.cs
@@ -106,7 +106,7 @@ internal sealed class User : ObservableObject
         User user = new(inner);
         bool isOk = false;
 
-        // TODO: need a flag to indentify hoyoverse account
+        // TODO: need a flag to identify hoyoverse account
         if (user.Entity.Stoken != null)
         {
             isOk = await user.InitializeCoreAsync(token).ConfigureAwait(false);
diff --git a/src/Snap.Hutao/Snap.Hutao/Service/DailyNote/DailyNoteNotifier.cs b/src/Snap.Hutao/Snap.Hutao/Service/DailyNote/DailyNoteNotifier.cs
index 69f168ce..619d007f 100644
--- a/src/Snap.Hutao/Snap.Hutao/Service/DailyNote/DailyNoteNotifier.cs
+++ b/src/Snap.Hutao/Snap.Hutao/Service/DailyNote/DailyNoteNotifier.cs
@@ -62,7 +62,7 @@ internal sealed class DailyNoteNotifier
 
             string? attribution = SH.ServiceDailyNoteNotifierAttribution;
 
-            // TODO: need a flag to indentify hoyoverse account
+            // TODO: need a flag to identify hoyoverse account
             // For global server, stoken is null
             if (entry.User.Stoken == null)
             {
diff --git a/src/Snap.Hutao/Snap.Hutao/View/Dialog/SignInWebViewDialog.xaml.cs b/src/Snap.Hutao/Snap.Hutao/View/Dialog/SignInWebViewDialog.xaml.cs
index 175a6e8f..44c3d0e7 100644
--- a/src/Snap.Hutao/Snap.Hutao/View/Dialog/SignInWebViewDialog.xaml.cs
+++ b/src/Snap.Hutao/Snap.Hutao/View/Dialog/SignInWebViewDialog.xaml.cs
@@ -47,9 +47,19 @@ internal sealed partial class SignInWebViewDialog : ContentDialog
             return;
         }
 
-        coreWebView2.SetCookie(user.CookieToken, user.Ltoken, null).SetMobileUserAgent();
-        signInJsInterface = new(coreWebView2, scope.ServiceProvider);
-        coreWebView2.Navigate("https://webstatic.mihoyo.com/bbs/event/signin-ys/index.html?act_id=e202009291139501");
+        // TODO: need a flag to identify hoyoverse account
+        if (user.Stoken == null)
+        {
+            coreWebView2.SetCookie(user.CookieToken, user.Ltoken, null).SetOsMobileUserAgent();
+            signInJsInterface = new(coreWebView2, scope.ServiceProvider);
+            coreWebView2.Navigate("https://act.hoyolab.com/ys/event/signin-sea-v3/index.html?act_id=e202102251931481&hyl_presentation_style=fullscreen");
+        }
+        else
+        {
+            coreWebView2.SetCookie(user.CookieToken, user.Ltoken, null).SetMobileUserAgent();
+            signInJsInterface = new(coreWebView2, scope.ServiceProvider);
+            coreWebView2.Navigate("https://webstatic.mihoyo.com/bbs/event/signin-ys/index.html?act_id=e202009291139501");
+        }
     }
 
     private void OnContentDialogClosed(ContentDialog sender, ContentDialogClosedEventArgs args)
diff --git a/src/Snap.Hutao/Snap.Hutao/Web/Bridge/CoreWebView2Extension.cs b/src/Snap.Hutao/Snap.Hutao/Web/Bridge/CoreWebView2Extension.cs
index 3decfd09..c32bd1ab 100644
--- a/src/Snap.Hutao/Snap.Hutao/Web/Bridge/CoreWebView2Extension.cs
+++ b/src/Snap.Hutao/Snap.Hutao/Web/Bridge/CoreWebView2Extension.cs
@@ -23,6 +23,17 @@ internal static class CoreWebView2Extension
         return webView;
     }
 
+    /// <summary>
+    /// 设置 移动端UA
+    /// </summary>
+    /// <param name="webView">webview2</param>
+    /// <returns>链式调用的WebView2</returns>
+    public static CoreWebView2 SetOsMobileUserAgent(this CoreWebView2 webView)
+    {
+        webView.Settings.UserAgent = Core.CoreEnvironment.HoyolabOsMobileUA;
+        return webView;
+    }
+
     /// <summary>
     /// 设置WebView2的Cookie
     /// </summary>
diff --git a/src/Snap.Hutao/Snap.Hutao/Web/Hoyolab/Takumi/Event/Calculate/CalculateClient.cs b/src/Snap.Hutao/Snap.Hutao/Web/Hoyolab/Takumi/Event/Calculate/CalculateClient.cs
index 940ee413..65ae7028 100644
--- a/src/Snap.Hutao/Snap.Hutao/Web/Hoyolab/Takumi/Event/Calculate/CalculateClient.cs
+++ b/src/Snap.Hutao/Snap.Hutao/Web/Hoyolab/Takumi/Event/Calculate/CalculateClient.cs
@@ -44,7 +44,7 @@ internal sealed class CalculateClient
     public async Task<Response<Consumption>> ComputeAsync(Model.Entity.User user, AvatarPromotionDelta delta, CancellationToken token = default)
     {
         Response<Consumption>? resp;
-        // TODO: need a flag to indentify hoyoverse account
+        // TODO: need a flag to identify hoyoverse account
         if (user.Stoken == null)
         {
             resp = await httpClient