diff --git a/android/app/src/main/res/drawable-hdpi/android12splash.png b/android/app/src/main/res/drawable-hdpi/android12splash.png
index e72a885..29fa6b4 100644
Binary files a/android/app/src/main/res/drawable-hdpi/android12splash.png and b/android/app/src/main/res/drawable-hdpi/android12splash.png differ
diff --git a/android/app/src/main/res/drawable-hdpi/ic_launcher_foreground.png b/android/app/src/main/res/drawable-hdpi/ic_launcher_foreground.png
index 389ec52..e4a60c1 100644
Binary files a/android/app/src/main/res/drawable-hdpi/ic_launcher_foreground.png and b/android/app/src/main/res/drawable-hdpi/ic_launcher_foreground.png differ
diff --git a/android/app/src/main/res/drawable-hdpi/splash_screen.png b/android/app/src/main/res/drawable-hdpi/splash_screen.png
index d212bc5..0748f71 100644
Binary files a/android/app/src/main/res/drawable-hdpi/splash_screen.png and b/android/app/src/main/res/drawable-hdpi/splash_screen.png differ
diff --git a/android/app/src/main/res/drawable-mdpi/android12splash.png b/android/app/src/main/res/drawable-mdpi/android12splash.png
index 391d362..f053f0c 100644
Binary files a/android/app/src/main/res/drawable-mdpi/android12splash.png and b/android/app/src/main/res/drawable-mdpi/android12splash.png differ
diff --git a/android/app/src/main/res/drawable-mdpi/ic_launcher_foreground.png b/android/app/src/main/res/drawable-mdpi/ic_launcher_foreground.png
index f3651f9..4ba52f4 100644
Binary files a/android/app/src/main/res/drawable-mdpi/ic_launcher_foreground.png and b/android/app/src/main/res/drawable-mdpi/ic_launcher_foreground.png differ
diff --git a/android/app/src/main/res/drawable-mdpi/splash_screen.png b/android/app/src/main/res/drawable-mdpi/splash_screen.png
index 96302e8..2ff2a33 100644
Binary files a/android/app/src/main/res/drawable-mdpi/splash_screen.png and b/android/app/src/main/res/drawable-mdpi/splash_screen.png differ
diff --git a/android/app/src/main/res/drawable-night-v21/launch_background.xml b/android/app/src/main/res/drawable-night-v21/launch_background.xml
index 783bcaf..35eaddd 100644
--- a/android/app/src/main/res/drawable-night-v21/launch_background.xml
+++ b/android/app/src/main/res/drawable-night-v21/launch_background.xml
@@ -2,18 +2,6 @@
 <!-- Author: fruit.com.cn -->
 <layer-list xmlns:android="http://schemas.android.com/apk/res/android">
     <item android:drawable="@color/splash_background" />
-    <item>
-        <shape android:shape="rectangle">
-            <gradient
-                android:type="radial"
-                android:centerX="0"
-                android:centerY="0"
-                android:gradientRadius="350dp"
-                android:startColor="#FF6B011A"
-                android:centerColor="#616B011A"
-                android:endColor="#006B011A" />
-        </shape>
-    </item>
     <item>
         <bitmap
             android:gravity="center"
diff --git a/android/app/src/main/res/drawable-night/launch_background.xml b/android/app/src/main/res/drawable-night/launch_background.xml
index 783bcaf..35eaddd 100644
--- a/android/app/src/main/res/drawable-night/launch_background.xml
+++ b/android/app/src/main/res/drawable-night/launch_background.xml
@@ -2,18 +2,6 @@
 <!-- Author: fruit.com.cn -->
 <layer-list xmlns:android="http://schemas.android.com/apk/res/android">
     <item android:drawable="@color/splash_background" />
-    <item>
-        <shape android:shape="rectangle">
-            <gradient
-                android:type="radial"
-                android:centerX="0"
-                android:centerY="0"
-                android:gradientRadius="350dp"
-                android:startColor="#FF6B011A"
-                android:centerColor="#616B011A"
-                android:endColor="#006B011A" />
-        </shape>
-    </item>
     <item>
         <bitmap
             android:gravity="center"
diff --git a/android/app/src/main/res/drawable-v21/launch_background.xml b/android/app/src/main/res/drawable-v21/launch_background.xml
index 783bcaf..35eaddd 100644
--- a/android/app/src/main/res/drawable-v21/launch_background.xml
+++ b/android/app/src/main/res/drawable-v21/launch_background.xml
@@ -2,18 +2,6 @@
 <!-- Author: fruit.com.cn -->
 <layer-list xmlns:android="http://schemas.android.com/apk/res/android">
     <item android:drawable="@color/splash_background" />
-    <item>
-        <shape android:shape="rectangle">
-            <gradient
-                android:type="radial"
-                android:centerX="0"
-                android:centerY="0"
-                android:gradientRadius="350dp"
-                android:startColor="#FF6B011A"
-                android:centerColor="#616B011A"
-                android:endColor="#006B011A" />
-        </shape>
-    </item>
     <item>
         <bitmap
             android:gravity="center"
diff --git a/android/app/src/main/res/drawable-v31/launch_background.xml b/android/app/src/main/res/drawable-v31/launch_background.xml
index 783bcaf..35eaddd 100644
--- a/android/app/src/main/res/drawable-v31/launch_background.xml
+++ b/android/app/src/main/res/drawable-v31/launch_background.xml
@@ -2,18 +2,6 @@
 <!-- Author: fruit.com.cn -->
 <layer-list xmlns:android="http://schemas.android.com/apk/res/android">
     <item android:drawable="@color/splash_background" />
-    <item>
-        <shape android:shape="rectangle">
-            <gradient
-                android:type="radial"
-                android:centerX="0"
-                android:centerY="0"
-                android:gradientRadius="350dp"
-                android:startColor="#FF6B011A"
-                android:centerColor="#616B011A"
-                android:endColor="#006B011A" />
-        </shape>
-    </item>
     <item>
         <bitmap
             android:gravity="center"
diff --git a/android/app/src/main/res/drawable-xhdpi/android12splash.png b/android/app/src/main/res/drawable-xhdpi/android12splash.png
index 11f7c4c..2b0269b 100644
Binary files a/android/app/src/main/res/drawable-xhdpi/android12splash.png and b/android/app/src/main/res/drawable-xhdpi/android12splash.png differ
diff --git a/android/app/src/main/res/drawable-xhdpi/ic_launcher_foreground.png b/android/app/src/main/res/drawable-xhdpi/ic_launcher_foreground.png
index 1d1e59f..e37ed4d 100644
Binary files a/android/app/src/main/res/drawable-xhdpi/ic_launcher_foreground.png and b/android/app/src/main/res/drawable-xhdpi/ic_launcher_foreground.png differ
diff --git a/android/app/src/main/res/drawable-xhdpi/splash_screen.png b/android/app/src/main/res/drawable-xhdpi/splash_screen.png
index 9340c27..1c7512f 100644
Binary files a/android/app/src/main/res/drawable-xhdpi/splash_screen.png and b/android/app/src/main/res/drawable-xhdpi/splash_screen.png differ
diff --git a/android/app/src/main/res/drawable-xxhdpi/android12splash.png b/android/app/src/main/res/drawable-xxhdpi/android12splash.png
index 03997b6..804f30b 100644
Binary files a/android/app/src/main/res/drawable-xxhdpi/android12splash.png and b/android/app/src/main/res/drawable-xxhdpi/android12splash.png differ
diff --git a/android/app/src/main/res/drawable-xxhdpi/ic_launcher_foreground.png b/android/app/src/main/res/drawable-xxhdpi/ic_launcher_foreground.png
index 3debd0c..f7a6252 100644
Binary files a/android/app/src/main/res/drawable-xxhdpi/ic_launcher_foreground.png and b/android/app/src/main/res/drawable-xxhdpi/ic_launcher_foreground.png differ
diff --git a/android/app/src/main/res/drawable-xxhdpi/splash_screen.png b/android/app/src/main/res/drawable-xxhdpi/splash_screen.png
index 7e21de4..b22884d 100644
Binary files a/android/app/src/main/res/drawable-xxhdpi/splash_screen.png and b/android/app/src/main/res/drawable-xxhdpi/splash_screen.png differ
diff --git a/android/app/src/main/res/drawable-xxxhdpi/android12splash.png b/android/app/src/main/res/drawable-xxxhdpi/android12splash.png
index 7cd718d..9547a0c 100644
Binary files a/android/app/src/main/res/drawable-xxxhdpi/android12splash.png and b/android/app/src/main/res/drawable-xxxhdpi/android12splash.png differ
diff --git a/android/app/src/main/res/drawable-xxxhdpi/ic_launcher_foreground.png b/android/app/src/main/res/drawable-xxxhdpi/ic_launcher_foreground.png
index 82cf0e7..e5294c1 100644
Binary files a/android/app/src/main/res/drawable-xxxhdpi/ic_launcher_foreground.png and b/android/app/src/main/res/drawable-xxxhdpi/ic_launcher_foreground.png differ
diff --git a/android/app/src/main/res/drawable-xxxhdpi/splash_screen.png b/android/app/src/main/res/drawable-xxxhdpi/splash_screen.png
index 18166b9..081795d 100644
Binary files a/android/app/src/main/res/drawable-xxxhdpi/splash_screen.png and b/android/app/src/main/res/drawable-xxxhdpi/splash_screen.png differ
diff --git a/android/app/src/main/res/drawable/launch_background.xml b/android/app/src/main/res/drawable/launch_background.xml
index 783bcaf..35eaddd 100644
--- a/android/app/src/main/res/drawable/launch_background.xml
+++ b/android/app/src/main/res/drawable/launch_background.xml
@@ -2,18 +2,6 @@
 <!-- Author: fruit.com.cn -->
 <layer-list xmlns:android="http://schemas.android.com/apk/res/android">
     <item android:drawable="@color/splash_background" />
-    <item>
-        <shape android:shape="rectangle">
-            <gradient
-                android:type="radial"
-                android:centerX="0"
-                android:centerY="0"
-                android:gradientRadius="350dp"
-                android:startColor="#FF6B011A"
-                android:centerColor="#616B011A"
-                android:endColor="#006B011A" />
-        </shape>
-    </item>
     <item>
         <bitmap
             android:gravity="center"
diff --git a/android/app/src/main/res/mipmap-hdpi/ic_launcher.png b/android/app/src/main/res/mipmap-hdpi/ic_launcher.png
index 4da487a..faf6f56 100644
Binary files a/android/app/src/main/res/mipmap-hdpi/ic_launcher.png and b/android/app/src/main/res/mipmap-hdpi/ic_launcher.png differ
diff --git a/android/app/src/main/res/mipmap-hdpi/ic_launcher_background.png b/android/app/src/main/res/mipmap-hdpi/ic_launcher_background.png
index d889f3b..36f0d04 100644
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diff --git a/android/app/src/main/res/mipmap-mdpi/ic_launcher.png b/android/app/src/main/res/mipmap-mdpi/ic_launcher.png
index 8f28511..aa15255 100644
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diff --git a/android/app/src/main/res/mipmap-mdpi/ic_launcher_background.png b/android/app/src/main/res/mipmap-mdpi/ic_launcher_background.png
index c554481..d37dbf5 100644
Binary files a/android/app/src/main/res/mipmap-mdpi/ic_launcher_background.png and b/android/app/src/main/res/mipmap-mdpi/ic_launcher_background.png differ
diff --git a/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png b/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png
index 28821a4..84b0410 100644
Binary files a/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png and b/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png differ
diff --git a/android/app/src/main/res/mipmap-xhdpi/ic_launcher_background.png b/android/app/src/main/res/mipmap-xhdpi/ic_launcher_background.png
index 7f5618a..432a1d0 100644
Binary files a/android/app/src/main/res/mipmap-xhdpi/ic_launcher_background.png and b/android/app/src/main/res/mipmap-xhdpi/ic_launcher_background.png differ
diff --git a/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png b/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
index 8eb9510..d1f6548 100644
Binary files a/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png and b/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png differ
diff --git a/android/app/src/main/res/mipmap-xxhdpi/ic_launcher_background.png b/android/app/src/main/res/mipmap-xxhdpi/ic_launcher_background.png
index bb09911..d173658 100644
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diff --git a/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png b/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
index c0b6e26..09b9fa9 100644
Binary files a/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png and b/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png differ
diff --git a/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher_background.png b/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher_background.png
index d07bda0..4a71177 100644
Binary files a/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher_background.png and b/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher_background.png differ
diff --git a/android/app/src/main/res/values/colors.xml b/android/app/src/main/res/values/colors.xml
index 88104f4..0064983 100644
--- a/android/app/src/main/res/values/colors.xml
+++ b/android/app/src/main/res/values/colors.xml
@@ -3,5 +3,5 @@
 
 <resources>
 	<color name="splash_background">#000000</color>
-	<color name="ic_launcher_background">#E9142E</color>
-</resources>
+	<color name="ic_launcher_background">#000000</color>
+</resources>
\ No newline at end of file
diff --git a/assets/icon/splash_logo.png b/assets/icon/splash_logo.png
index 9b81b50..17b01cf 100644
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diff --git a/assets/icon/ymb.png b/assets/icon/ymb.png
index 104b093..20fb75b 100644
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diff --git a/assets/icon/ymb_android12.png b/assets/icon/ymb_android12.png
index 7cd718d..9547a0c 100644
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diff --git a/assets/icon/ymb_foreground.png b/assets/icon/ymb_foreground.png
index 513ab0a..a730a3a 100644
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diff --git a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-1024x1024@1x.png b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-1024x1024@1x.png
index 104b093..b289052 100644
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diff --git a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@1x.png b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@1x.png
index 35474e4..56bc084 100644
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diff --git a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@2x.png b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@2x.png
index 1e779a6..45f07dd 100644
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diff --git a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@3x.png b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@3x.png
index e3ad8c6..4a26583 100644
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diff --git a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@1x.png b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@1x.png
index 08f2dc9..953f359 100644
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diff --git a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@2x.png b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@2x.png
index f67a16d..1b6c2d2 100644
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diff --git a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@3x.png b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@3x.png
index f449abb..f22bab9 100644
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diff --git a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-40x40@1x.png b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-40x40@1x.png
index 1e779a6..45f07dd 100644
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diff --git a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-50x50@1x.png b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-50x50@1x.png
index 233ba2b..43c0b17 100644
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diff --git a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-50x50@2x.png b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-50x50@2x.png
index 2de1e44..0173ff2 100644
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diff --git a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-57x57@1x.png b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-57x57@1x.png
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index b2814f4..fc806c2 100644
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diff --git a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-60x60@2x.png b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-60x60@2x.png
index 4a88a44..ce5d937 100644
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diff --git a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-60x60@3x.png b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-60x60@3x.png
index bab729a..4420df6 100644
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diff --git a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-72x72@1x.png b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-72x72@1x.png
index 4da487a..faf6f56 100644
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index 8eb9510..d1f6548 100644
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diff --git a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-76x76@2x.png b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-76x76@2x.png
index 8cb7273..aeb84bb 100644
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diff --git a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-83.5x83.5@2x.png b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-83.5x83.5@2x.png
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diff --git a/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage.png b/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage.png
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diff --git a/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@2x.png b/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@2x.png
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diff --git a/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@3x.png b/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@3x.png
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diff --git a/pubspec.yaml b/pubspec.yaml
index 355c0f8..10dcd44 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -146,12 +146,12 @@ flutter_launcher_icons:
   android: true
   ios: true
   image_path: assets/icon/ymb.png
-  adaptive_icon_background: "#E9142E"
+  adaptive_icon_background: "#000000"
   adaptive_icon_foreground: assets/icon/ymb_foreground.png
   remove_alpha_ios: true
 
 # 开屏页资源目前是手工维护的：Android 走 res/drawable*/launch_background.xml
-# （黑底暗红渐变 + 居中标识），iOS 走 LaunchImage.imageset 的完整参考图。
+# （黑底白字标居中），iOS 走 LaunchImage.imageset 的完整参考图。
 # 不要再执行 `dart run flutter_native_splash:create`，它只会按 color 重新生成，
 # 会覆盖固定尺寸布局。使用 python3 tools/generate_brand_assets.py 生成资源。
 flutter_native_splash:
diff --git a/test/config/brand_identity_test.dart b/test/config/brand_identity_test.dart
index 4fd9d41..eb2c5d5 100644
--- a/test/config/brand_identity_test.dart
+++ b/test/config/brand_identity_test.dart
@@ -14,7 +14,7 @@ const _launchWidth = 390;
 const _launchHeight = 844;
 const _androidRoot = 'android/app/src/main/res';
 const _iosRoot = 'ios/Runner/Assets.xcassets';
-const _red = [245, 48, 59, 255];
+const _ink = [0, 0, 0, 255];
 
 void main() {
   TestWidgetsFlutterBinding.ensureInitialized();
@@ -32,9 +32,9 @@ void main() {
     expect(image.width, _iconSize);
     expect(image.height, _iconSize);
     final bytes = await image.toByteData();
-    final pixel = bytes!.buffer.asUint8List().sublist(0, _red.length);
-    for (var channel = 0; channel < _red.length; channel++) {
-      expect(pixel[channel], closeTo(_red[channel], 2));
+    final pixel = bytes!.buffer.asUint8List().sublist(0, _ink.length);
+    for (var channel = 0; channel < _ink.length; channel++) {
+      expect(pixel[channel], closeTo(_ink[channel], 2));
     }
   });
 
@@ -84,7 +84,8 @@ void main() {
       final layers = File(
         '$_androidRoot/drawable$qualifier/launch_background.xml',
       ).readAsStringSync();
-      expect(layers, contains('<gradient'));
+      expect(layers, contains('@color/splash_background'));
+      expect(layers, isNot(contains('<gradient')));
       expect(layers, contains('android:gravity="center"'));
       expect(layers, contains('@drawable/splash_screen'));
     }
diff --git a/tools/generate_brand_assets.py b/tools/generate_brand_assets.py
index 9a7d97d..059e4b9 100644
--- a/tools/generate_brand_assets.py
+++ b/tools/generate_brand_assets.py
@@ -12,7 +12,7 @@ IOS = ROOT / "ios/Runner/Assets.xcassets"
 ANDROID = ROOT / "android/app/src/main/res"
 REFERENCE = ROOT / "assets/branding/ymb-reference.png"
 LAUNCH_REFERENCE = ROOT / "assets/branding/ymb-launch-reference.png"
-BRAND_RED = "#E9142E"
+BRAND_BACKGROUND = "#000000"
 WHITE = "#FFFFFF"
 CLEAR = (0, 0, 0, 0)
 MASTER_SIZE = 1024
@@ -104,7 +104,7 @@ def android_assets(master, foreground):
             ANDROID / f"drawable-{density}/ic_launcher_foreground.png",
         )
         save(
-            Image.new("RGB", (pixels, pixels), BRAND_RED),
+            Image.new("RGB", (pixels, pixels), BRAND_BACKGROUND),
             ANDROID / f"mipmap-{density}/ic_launcher_background.png",
         )
         mark = splash_icon(master, round(SPLASH_SIZE * scale))
@@ -117,10 +117,13 @@ def android_assets(master, foreground):
 def main():
     """直接复用确认的原始图标和开屏，输出平台所需尺寸。"""
     reference = Image.open(REFERENCE).convert("RGB")
-    master = reference.resize((MASTER_SIZE, MASTER_SIZE), RESAMPLE)
     mark = wordmark(reference)
+    master = centered(
+        Image.new("RGBA", (MASTER_SIZE, MASTER_SIZE), (0, 0, 0, 255)),
+        mark.resize((MASTER_SIZE, MASTER_SIZE), RESAMPLE),
+    )
     foreground = mark.resize((MASTER_SIZE, MASTER_SIZE), RESAMPLE)
-    save(master, ASSETS / "ymb.png")
+    save(master.convert("RGB"), ASSETS / "ymb.png")
     save(foreground, ASSETS / "ymb_foreground.png")
     placeholder = centered(
         Image.new("RGBA", PLACEHOLDER_SIZE, CLEAR),