diff --git a/build.ps1 b/build.ps1
index df5c8d1..7a0c103 100644
--- a/build.ps1
+++ b/build.ps1
@@ -65,7 +65,11 @@ if ($buildSetup) {
     Write-Host "  输入: $inputPs1" -ForegroundColor Gray
     Write-Host "  输出: $outputExe" -ForegroundColor Gray
 
-    $iconFile = Join-Path $ScriptDir "bookworm.ico"
+    # 优先用桌面专用 B 圆图标 (高对比度, 小尺寸清晰), 回退到 galaxy
+    $iconFile = Join-Path $ScriptDir "bookworm-desktop.ico"
+    if (-not (Test-Path $iconFile)) {
+        $iconFile = Join-Path $ScriptDir "bookworm.ico"
+    }
     $ps2exeArgs = @{
         InputFile   = $inputPs1
         OutputFile  = $outputExe