diff --git a/packages/rpa-core/src/capabilities/desktop.ts b/packages/rpa-core/src/capabilities/desktop.ts
index 4c14823..6e7a828 100644
--- a/packages/rpa-core/src/capabilities/desktop.ts
+++ b/packages/rpa-core/src/capabilities/desktop.ts
@@ -151,7 +151,10 @@ const clipboardSet: CapabilityHandler = async (_ctx, _node, args) => {
 const notice: CapabilityHandler = async (_ctx, _node, args) => {
   const title = text(args, ["title"], "提醒");
   const content = text(args, ["text", "message"]);
-  await powershell(`Add-Type -AssemblyName System.Windows.Forms; [System.Windows.Forms.MessageBox]::Show(${psString(content)},${psString(title)}) | Out-Null`);
+  // MessageBox 阻塞等用户点确定，同样不能吃 powershell() 默认 30s 超时；且 MB_TOPMOST 保证弹窗不被主窗口盖住
+  const waitSeconds = number(args, ["wait_time", "waitTime", "timeout"], 600);
+  const timeoutMs = Math.max(10000, Math.round(waitSeconds * 1000));
+  await powershell(`Add-Type -AssemblyName System.Windows.Forms; [System.Windows.Forms.MessageBox]::Show(${psString(content)},${psString(title)},'OK','Information','Button1','HelpButton',1) | Out-Null`, timeoutMs);
   return true;
 };
 
@@ -204,26 +207,73 @@ register("Dialog_CsMsgBox", async (_ctx, _node, args) => {
 register("Dialog_OpenFile", async (_ctx, _node, args) => {
   const title = text(args, ["title"], "选择文件");
   const wildcard = text(args, ["wildcard"], "所有文件|*.*");
-  return powershell("Add-Type -AssemblyName System.Windows.Forms | Out-Null; $dlg = New-Object System.Windows.Forms.OpenFileDialog; $dlg.Filter = " + psString(wildcard) + "; $dlg.Title = " + psString(title) + "; if ($dlg.ShowDialog() -eq 'OK') { $dlg.FileName } else { '' }");
+  // ShowDialog 阻塞等用户选择，等待上限给到 30 分钟（文件挑选通常耗时更久）
+  return powershell("Add-Type -AssemblyName System.Windows.Forms | Out-Null; $dlg = New-Object System.Windows.Forms.OpenFileDialog; $dlg.Filter = " + psString(wildcard) + "; $dlg.Title = " + psString(title) + "; if ($dlg.ShowDialog() -eq 'OK') { $dlg.FileName } else { '' }", 1800000);
 });
 
 register("Dialog_OpenFiles", async (_ctx, _node, args) => {
   const title = text(args, ["title"], "选择文件");
   const wildcard = text(args, ["wildcard"], "所有文件|*.*");
-  return powershell("Add-Type -AssemblyName System.Windows.Forms | Out-Null; $dlg = New-Object System.Windows.Forms.OpenFileDialog; $dlg.Filter = " + psString(wildcard) + "; $dlg.Title = " + psString(title) + "; $dlg.Multiselect = $true; if ($dlg.ShowDialog() -eq 'OK') { $dlg.FileNames -join ';' } else { '' }");
+  return powershell("Add-Type -AssemblyName System.Windows.Forms | Out-Null; $dlg = New-Object System.Windows.Forms.OpenFileDialog; $dlg.Filter = " + psString(wildcard) + "; $dlg.Title = " + psString(title) + "; $dlg.Multiselect = $true; if ($dlg.ShowDialog() -eq 'OK') { $dlg.FileNames -join ';' } else { '' }", 1800000);
 });
 
 register("Dialog_SaveFile", async (_ctx, _node, args) => {
   const title = text(args, ["title"], "保存文件");
   const wildcard = text(args, ["wildcard"], "所有文件|*.*");
-  return powershell("Add-Type -AssemblyName System.Windows.Forms | Out-Null; $dlg = New-Object System.Windows.Forms.SaveFileDialog; $dlg.Filter = " + psString(wildcard) + "; $dlg.Title = " + psString(title) + "; if ($dlg.ShowDialog() -eq 'OK') { $dlg.FileName } else { '' }");
+  return powershell("Add-Type -AssemblyName System.Windows.Forms | Out-Null; $dlg = New-Object System.Windows.Forms.SaveFileDialog; $dlg.Filter = " + psString(wildcard) + "; $dlg.Title = " + psString(title) + "; if ($dlg.ShowDialog() -eq 'OK') { $dlg.FileName } else { '' }", 1800000);
 });
 
 register(["Dialog_InputBox", "Dialog_CsInputBox"], async (_ctx, _node, args) => {
   const title = text(args, ["title", "input_title"], "请输入");
   const description = text(args, ["description", "txt_content"], "");
   const defaultValue = text(args, ["text"], "");
-  return powershell("Add-Type -AssemblyName Microsoft.VisualBasic | Out-Null; [Microsoft.VisualBasic.Interaction]::InputBox(" + psString(description) + ", " + psString(title) + ", " + psString(defaultValue) + ")");
+  // 交互对话框会一直阻塞等用户输入，必须给 powershell() 传足够长的超时（默认 30s 会把还在等人的对话框进程杀掉，报 Command failed）。
+  // 默认 10 分钟，可用 wait_time（秒）自定义；仍超时则报「用户未及时输入」而非笼统的 Command failed。
+  const waitSeconds = number(args, ["wait_time", "waitTime", "timeout"], 600);
+  const timeoutMs = Math.max(10000, Math.round(waitSeconds * 1000));
+  // VB InputBox 不置顶也不在任务栏显示，容易被主窗口盖住导致"看不见弹窗→干等超时"。
+  // 改用 WinForms 窗口：Topmost 强制置顶 + ShowInTaskbar + StartPosition 屏幕中央，保证用户一定看得见。
+  const script = [
+    "Add-Type -AssemblyName System.Windows.Forms | Out-Null",
+    "Add-Type -AssemblyName System.Drawing | Out-Null",
+    "$form = New-Object System.Windows.Forms.Form",
+    "$form.Text = " + psString(title),
+    "$form.Size = New-Object System.Drawing.Size(460, 240)",
+    "$form.StartPosition = 'CenterScreen'",
+    "$form.TopMost = $true",
+    "$form.ShowInTaskbar = $true",
+    "$form.FormBorderStyle = 'FixedDialog'",
+    "$form.MaximizeBox = $false",
+    "$label = New-Object System.Windows.Forms.Label",
+    "$label.Text = " + psString(description),
+    "$label.Location = New-Object System.Drawing.Point(14, 12)",
+    "$label.Size = New-Object System.Drawing.Size(416, 60)",
+    "$box = New-Object System.Windows.Forms.TextBox",
+    "$box.Text = " + psString(defaultValue),
+    "$box.Location = New-Object System.Drawing.Point(14, 78)",
+    "$box.Size = New-Object System.Drawing.Size(416, 26)",
+    "$ok = New-Object System.Windows.Forms.Button",
+    "$ok.Text = '确定'",
+    "$ok.DialogResult = [System.Windows.Forms.DialogResult]::OK",
+    "$ok.Location = New-Object System.Drawing.Point(256, 150)",
+    "$ok.Size = New-Object System.Drawing.Size(84, 30)",
+    "$form.AcceptButton = $ok",
+    "$cancel = New-Object System.Windows.Forms.Button",
+    "$cancel.Text = '取消'",
+    "$cancel.DialogResult = [System.Windows.Forms.DialogResult]::Cancel",
+    "$cancel.Location = New-Object System.Drawing.Point(346, 150)",
+    "$cancel.Size = New-Object System.Drawing.Size(84, 30)",
+    "$form.Controls.AddRange(@($label, $box, $ok, $cancel))",
+    "$form.Add_Shown({ $form.Activate() })",
+    "$result = $form.ShowDialog()",
+    "if ($result -eq [System.Windows.Forms.DialogResult]::OK) { $box.Text } else { '' }"
+  ].join("; ");
+  return powershell(script, timeoutMs).then((value) => ({ value, canceled: value === "" })).catch((error) => {
+    if (error instanceof RuntimeError && /Command failed/.test(error.message) && !error.message.includes("RPA_ERROR")) {
+      throw new RuntimeError("dialog_timeout", `输入对话框等待超时（${Math.round(timeoutMs / 1000)} 秒）用户未完成输入`, { nodeId: _node.id, componentId: _node.componentId, recommendation: "置顶输入框应显示在屏幕最前；若仍超时请调大节点的超时时间或 wait_time 参数" });
+    }
+    throw error;
+  });
 });
 
 register("Dialog_Notice", notice);