feat(brand): 应用图标、开屏资源与品牌字体切换为 ymb

android/app/src/main/AndroidManifest.xml

@@ -6,7 +6,7 @@
     <uses-permission
         android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
     <application
-        android:label="FruitShorts"
+        android:label="ymb"
         android:name="${applicationName}"
         android:icon="@mipmap/ic_launcher"
         android:usesCleartextTraffic="true">

android/app/src/main/res/drawable-night-v21/launch_background.xml

@@ -2,6 +2,18 @@
 <!-- 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"

android/app/src/main/res/drawable-night/launch_background.xml

@@ -2,6 +2,18 @@
 <!-- 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"

android/app/src/main/res/drawable-v21/launch_background.xml

@@ -2,6 +2,18 @@
 <!-- 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"

android/app/src/main/res/drawable-v31/launch_background.xml

@@ -2,6 +2,18 @@
 <!-- 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"

android/app/src/main/res/drawable/launch_background.xml

@@ -2,6 +2,18 @@
 <!-- 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"

android/app/src/main/res/values-night-v31/styles.xml

@@ -8,7 +8,7 @@
         <item name="android:windowDrawsSystemBarBackgrounds">false</item>
         <item name="android:windowLayoutInDisplayCutoutMode">shortEdges</item>
         <item name="android:windowSplashScreenBackground">#000000</item>
-        <item name="android:windowSplashScreenAnimatedIcon">@drawable/splash_brand</item>
+        <item name="android:windowSplashScreenAnimatedIcon">@drawable/android12splash</item>
         <item name="android:windowSplashScreenAnimationDuration">0</item>
     </style>
     <style name="NormalTheme" parent="@android:style/Theme.Black.NoTitleBar">

android/app/src/main/res/values-v31/styles.xml

@@ -8,7 +8,7 @@
         <item name="android:windowDrawsSystemBarBackgrounds">false</item>
         <item name="android:windowLayoutInDisplayCutoutMode">shortEdges</item>
         <item name="android:windowSplashScreenBackground">#000000</item>
-        <item name="android:windowSplashScreenAnimatedIcon">@drawable/splash_brand</item>
+        <item name="android:windowSplashScreenAnimatedIcon">@drawable/android12splash</item>
         <item name="android:windowSplashScreenAnimationDuration">0</item>
     </style>
     <style name="NormalTheme" parent="@android:style/Theme.Light.NoTitleBar">

android/app/src/main/res/values/colors.xml

@@ -3,5 +3,5 @@
 
 <resources>
 	<color name="splash_background">#000000</color>
-	<color name="ic_launcher_background">#FF6B2C</color>
-</resources>
+	<color name="ic_launcher_background">#E9142E</color>
+</resources>

ios/Runner/Info.plist

@@ -1,115 +1,115 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
+<dict>
+	<key>CADisableMinimumFrameDurationOnPhone</key>
+	<true/>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleDisplayName</key>
+	<string>ymb</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>ymb</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>$(FLUTTER_BUILD_NAME)</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>$(FLUTTER_BUILD_NUMBER)</string>
+	<key>LSRequiresIPhoneOS</key>
+	<true/>
+	<key>NSAppTransportSecurity</key>
 	<dict>
-		<key>CADisableMinimumFrameDurationOnPhone</key>
+		<key>NSAllowsArbitraryLoads</key>
 		<true/>
-		<key>CFBundleDevelopmentRegion</key>
-		<string>$(DEVELOPMENT_LANGUAGE)</string>
-		<key>CFBundleDisplayName</key>
-		<string>FruitShorts</string>
-		<key>CFBundleExecutable</key>
-		<string>$(EXECUTABLE_NAME)</string>
-		<key>CFBundleIdentifier</key>
-		<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
-		<key>CFBundleInfoDictionaryVersion</key>
-		<string>6.0</string>
-		<key>CFBundleName</key>
-		<string>FruitShorts</string>
-		<key>CFBundlePackageType</key>
-		<string>APPL</string>
-		<key>CFBundleShortVersionString</key>
-		<string>$(FLUTTER_BUILD_NAME)</string>
-		<key>CFBundleSignature</key>
-		<string>????</string>
-		<key>CFBundleVersion</key>
-		<string>$(FLUTTER_BUILD_NUMBER)</string>
-		<key>LSRequiresIPhoneOS</key>
+		<key>NSAllowsLocalNetworking</key>
 		<true/>
-		<key>NSAppTransportSecurity</key>
+		<key>NSExceptionDomains</key>
 		<dict>
-			<key>NSAllowsArbitraryLoads</key>
-			<true/>
-			<key>NSAllowsLocalNetworking</key>
-			<true/>
-			<key>NSExceptionDomains</key>
+			<key>127.0.0.1</key>
 			<dict>
-				<key>127.0.0.1</key>
-				<dict>
-					<key>NSExceptionAllowsInsecureHTTPLoads</key>
-					<true/>
-					<key>NSIncludesSubdomains</key>
-					<true/>
-				</dict>
-				<key>localhost</key>
-				<dict>
-					<key>NSExceptionAllowsInsecureHTTPLoads</key>
-					<true/>
-					<key>NSIncludesSubdomains</key>
-					<true/>
-				</dict>
-				<key>192.168.31.243</key>
-				<dict>
-					<key>NSExceptionAllowsInsecureHTTPLoads</key>
-					<true/>
-					<key>NSIncludesSubdomains</key>
-					<true/>
-				</dict>
-				<key>39.162.50.99</key>
-				<dict>
-					<key>NSExceptionAllowsInsecureHTTPLoads</key>
-					<true/>
-					<key>NSIncludesSubdomains</key>
-					<true/>
-				</dict>
+				<key>NSExceptionAllowsInsecureHTTPLoads</key>
+				<true/>
+				<key>NSIncludesSubdomains</key>
+				<true/>
+			</dict>
+			<key>192.168.31.243</key>
+			<dict>
+				<key>NSExceptionAllowsInsecureHTTPLoads</key>
+				<true/>
+				<key>NSIncludesSubdomains</key>
+				<true/>
+			</dict>
+			<key>39.162.50.99</key>
+			<dict>
+				<key>NSExceptionAllowsInsecureHTTPLoads</key>
+				<true/>
+				<key>NSIncludesSubdomains</key>
+				<true/>
+			</dict>
+			<key>localhost</key>
+			<dict>
+				<key>NSExceptionAllowsInsecureHTTPLoads</key>
+				<true/>
+				<key>NSIncludesSubdomains</key>
+				<true/>
 			</dict>
 		</dict>
-		<key>NSLocalNetworkUsageDescription</key>
-		<string>开发阶段需要访问同一局域网内的短剧内容服务。</string>
-		<key>UIApplicationSceneManifest</key>
-		<dict>
-			<key>UIApplicationSupportsMultipleScenes</key>
-			<false/>
-			<key>UISceneConfigurations</key>
-			<dict>
-				<key>UIWindowSceneSessionRoleApplication</key>
-				<array>
-					<dict>
-						<key>UISceneClassName</key>
-						<string>UIWindowScene</string>
-						<key>UISceneConfigurationName</key>
-						<string>flutter</string>
-						<key>UISceneDelegateClassName</key>
-						<string>$(PRODUCT_MODULE_NAME).SceneDelegate</string>
-						<key>UISceneStoryboardFile</key>
-						<string>Main</string>
-					</dict>
-				</array>
-			</dict>
-		</dict>
-		<key>UIBackgroundModes</key>
-		<array>
-			<string>audio</string>
-		</array>
-		<key>UIApplicationSupportsIndirectInputEvents</key>
-		<true/>
-		<key>UILaunchStoryboardName</key>
-		<string>LaunchScreen</string>
-		<key>UIMainStoryboardFile</key>
-		<string>Main</string>
-		<key>UISupportedInterfaceOrientations</key>
-		<array>
-			<string>UIInterfaceOrientationPortrait</string>
-			<string>UIInterfaceOrientationLandscapeLeft</string>
-			<string>UIInterfaceOrientationLandscapeRight</string>
-		</array>
-		<key>UISupportedInterfaceOrientations~ipad</key>
-		<array>
-			<string>UIInterfaceOrientationPortrait</string>
-			<string>UIInterfaceOrientationLandscapeLeft</string>
-			<string>UIInterfaceOrientationLandscapeRight</string>
-		</array>
-		<key>UIStatusBarHidden</key>
-		<false/>
 	</dict>
+	<key>NSLocalNetworkUsageDescription</key>
+	<string>开发阶段需要访问同一局域网内的短剧内容服务。</string>
+	<key>UIApplicationSceneManifest</key>
+	<dict>
+		<key>UIApplicationSupportsMultipleScenes</key>
+		<false/>
+		<key>UISceneConfigurations</key>
+		<dict>
+			<key>UIWindowSceneSessionRoleApplication</key>
+			<array>
+				<dict>
+					<key>UISceneClassName</key>
+					<string>UIWindowScene</string>
+					<key>UISceneConfigurationName</key>
+					<string>flutter</string>
+					<key>UISceneDelegateClassName</key>
+					<string>$(PRODUCT_MODULE_NAME).SceneDelegate</string>
+					<key>UISceneStoryboardFile</key>
+					<string>Main</string>
+				</dict>
+			</array>
+		</dict>
+	</dict>
+	<key>UIApplicationSupportsIndirectInputEvents</key>
+	<true/>
+	<key>UIBackgroundModes</key>
+	<array>
+		<string>audio</string>
+	</array>
+	<key>UILaunchStoryboardName</key>
+	<string>LaunchScreen</string>
+	<key>UIMainStoryboardFile</key>
+	<string>Main</string>
+	<key>UIStatusBarHidden</key>
+	<false/>
+	<key>UISupportedInterfaceOrientations</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+	<key>UISupportedInterfaceOrientations~ipad</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+</dict>
 </plist>

pubspec.yaml

@@ -87,11 +87,30 @@ flutter:
   assets:
     - assets/icon/
     - assets/icon/splash_logo.png
-    - assets/icon/splash_logo_android12.png
     - assets/icon/rail/
     # 只打包代码实际引用的那张登录背景（其余 3 张留在仓库但不进包）。
     - assets/auth/bg_3.jpg
 
+  fonts:
+    - family: PlusJakartaSans
+      fonts:
+        - asset: assets/fonts/PlusJakartaSans-Regular.ttf
+          weight: 400
+        - asset: assets/fonts/PlusJakartaSans-Medium.ttf
+          weight: 500
+        - asset: assets/fonts/PlusJakartaSans-SemiBold.ttf
+          weight: 600
+        - asset: assets/fonts/PlusJakartaSans-Bold.ttf
+          weight: 700
+    - family: Outfit
+      fonts:
+        - asset: assets/fonts/Outfit-Regular.ttf
+          weight: 400
+        - asset: assets/fonts/Outfit-SemiBold.ttf
+          weight: 600
+        - asset: assets/fonts/Outfit-Bold.ttf
+          weight: 700
+
   # To add assets to your application, add an assets section, like this:
   # assets:
   #   - images/a_dot_burr.jpeg
@@ -126,13 +145,15 @@ flutter:
 flutter_launcher_icons:
   android: true
   ios: true
-  image_path: assets/icon/fruitshorts.png
-  adaptive_icon_background: "#FF6B2C"
-  adaptive_icon_foreground: assets/icon/fruitshorts.png
+  image_path: assets/icon/ymb.png
+  adaptive_icon_background: "#E9142E"
+  adaptive_icon_foreground: assets/icon/ymb_foreground.png
   remove_alpha_ios: true
 
-# 修改以下开屏配置后，必须重新执行：
-# dart run flutter_native_splash:create
+# 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。
+# 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:
   color: "#000000"
   android: true
@@ -140,3 +161,4 @@ flutter_native_splash:
   web: false
   android_12:
     color: "#000000"
+    image: assets/icon/ymb_android12.png

test/config/brand_identity_test.dart

@@ -0,0 +1,136 @@
+// Author: fruit.com.cn
+// 验证品牌名称、原生启动布局与平台图标资源。
+
+import 'dart:convert';
+import 'dart:io';
+import 'dart:ui' as ui;
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:fruitshorts/l10n/app_localizations.dart';
+
+const _iconAsset = 'assets/icon/ymb.png';
+const _iconSize = 1024;
+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];
+
+void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+
+  test('should_use_ymb_when_resolving_each_app_locale', () async {
+    for (final locale in AppLocalizations.supportedLocales) {
+      final l10n = await AppLocalizations.delegate.load(locale);
+      expect(l10n.appName, 'ymb');
+    }
+  });
+
+  test('should_keep_reference_colors_when_decoding_master_icon', () async {
+    final image = await _decode(_iconAsset);
+    addTearDown(image.dispose);
+    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));
+    }
+  });
+
+  test('should_match_declared_sizes_when_loading_ios_app_icons', () async {
+    final manifest =
+        jsonDecode(
+              File(
+                '$_iosRoot/AppIcon.appiconset/Contents.json',
+              ).readAsStringSync(),
+            )
+            as Map<String, dynamic>;
+    for (final entry in manifest['images'] as List) {
+      final size = double.parse((entry['size'] as String).split('x').first);
+      final scale = int.parse((entry['scale'] as String).replaceAll('x', ''));
+      final image = await _decode(
+        '$_iosRoot/AppIcon.appiconset/${entry['filename']}',
+      );
+      expect(image.width, (size * scale).round());
+      expect(image.height, image.width);
+      image.dispose();
+    }
+  });
+
+  test('should_fit_full_reference_when_loading_ios_launch_screen', () {
+    final storyboard = File(
+      'ios/Runner/Base.lproj/LaunchScreen.storyboard',
+    ).readAsStringSync();
+    expect(storyboard, contains('contentMode="scaleAspectFit"'));
+    expect(storyboard, contains('firstAttribute="leading"'));
+    expect(storyboard, contains('firstAttribute="trailing"'));
+  });
+
+  test('should_keep_reference_ratio_when_loading_ios_launch_images', () async {
+    for (var scale = 1; scale <= 3; scale++) {
+      final suffix = scale == 1 ? '' : '@${scale}x';
+      final image = await _decode(
+        '$_iosRoot/LaunchImage.imageset/LaunchImage$suffix.png',
+      );
+      expect(image.width, _launchWidth * scale);
+      expect(image.height, _launchHeight * scale);
+      image.dispose();
+    }
+  });
+
+  test('should_keep_reference_tint_when_loading_android_launch_layers', () {
+    for (final qualifier in ['', '-v21', '-v31', '-night', '-night-v21']) {
+      final layers = File(
+        '$_androidRoot/drawable$qualifier/launch_background.xml',
+      ).readAsStringSync();
+      expect(layers, contains('<gradient'));
+      expect(layers, contains('android:gravity="center"'));
+      expect(layers, contains('@drawable/splash_screen'));
+    }
+  });
+
+  test('should_preserve_safe_area_when_loading_android12_mark', () async {
+    const root = '$_androidRoot/drawable-xxxhdpi';
+    final image = await _decode('$root/android12splash.png');
+    addTearDown(image.dispose);
+    const canvasSize = 1152;
+    const markInset = 416;
+    const center = canvasSize ~/ 2;
+    expect(image.width, canvasSize);
+    expect(image.height, canvasSize);
+    final data = (await image.toByteData())!.buffer.asUint8List();
+    int alphaAt(int x, int y) => data[(y * canvasSize + x) * 4 + 3];
+    expect(alphaAt(0, 0), 0);
+    expect(alphaAt(markInset - 1, center), 0);
+    expect(alphaAt(markInset + 1, center), 255);
+    expect(alphaAt(center, center), 255);
+    for (final qualifier in ['', '-night']) {
+      final styles = File(
+        '$_androidRoot/values$qualifier-v31/styles.xml',
+      ).readAsStringSync();
+      expect(styles, contains('@drawable/android12splash'));
+    }
+  });
+
+  test('should_use_ymb_when_resolving_platform_display_names', () {
+    final manifest = File(
+      'android/app/src/main/AndroidManifest.xml',
+    ).readAsStringSync();
+    expect(manifest, contains('android:label="ymb"'));
+    final plist = File('ios/Runner/Info.plist').readAsStringSync();
+    expect(
+      RegExp(
+        r'<key>CFBundleDisplayName</key>\s*<string>ymb</string>',
+      ).hasMatch(plist),
+      isTrue,
+    );
+  });
+}
+
+Future<ui.Image> _decode(String path) async {
+  final codec = await ui.instantiateImageCodec(File(path).readAsBytesSync());
+  final frame = await codec.getNextFrame();
+  codec.dispose();
+  return frame.image;
+}

test/theme/app_theme_test.dart

@@ -1,6 +1,7 @@
 // Author: fruit.com.cn
 
 import 'dart:math';
+import 'dart:io';
 
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
@@ -107,4 +108,18 @@ void main() {
     expect(AppTheme.cardShadow.blurRadius, 0);
     expect(AppTheme.cardShadow.offset, Offset.zero);
   });
+
+  test('should_register_brand_font_assets_in_pubspec', () {
+    final pubspec = File('pubspec.yaml').readAsStringSync();
+
+    expect(pubspec, contains('family: PlusJakartaSans'));
+    expect(pubspec, contains('PlusJakartaSans-Regular.ttf'));
+    expect(pubspec, contains('PlusJakartaSans-Medium.ttf'));
+    expect(pubspec, contains('PlusJakartaSans-SemiBold.ttf'));
+    expect(pubspec, contains('PlusJakartaSans-Bold.ttf'));
+    expect(pubspec, contains('family: Outfit'));
+    expect(pubspec, contains('Outfit-Regular.ttf'));
+    expect(pubspec, contains('Outfit-SemiBold.ttf'));
+    expect(pubspec, contains('Outfit-Bold.ttf'));
+  });
 }

tools/generate_brand_assets.py

@@ -0,0 +1,142 @@
+# Author: fruit.com.cn
+"""使用确认的 ymb 原图生成图标、启动标识及原生平台尺寸。"""
+
+import json
+from pathlib import Path
+
+from PIL import Image, ImageChops, ImageDraw
+
+ROOT = Path(__file__).resolve().parents[1]
+ASSETS = ROOT / "assets/icon"
+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"
+WHITE = "#FFFFFF"
+CLEAR = (0, 0, 0, 0)
+MASTER_SIZE = 1024
+SPLASH_SIZE = 80
+SPLASH_RADIUS = 18
+ANDROID12_SIZE = 288
+FOREGROUND_SIZE = 108
+LEGACY_SIZE = 48
+PLACEHOLDER_SIZE = (600, 360)
+LAUNCH_SIZE = (390, 844)
+WHITE_THRESHOLD = 100
+WHITE_RANGE = 145
+DENSITIES = {"mdpi": 1, "hdpi": 1.5, "xhdpi": 2, "xxhdpi": 3, "xxxhdpi": 4}
+RESAMPLE = Image.Resampling.LANCZOS
+
+
+def wordmark(reference):
+    """从原图白色字标提取透明前景，不重新绘制或改变字形。"""
+    channels = reference.convert("RGB").split()
+    lightness = ImageChops.darker(ImageChops.darker(*channels[:2]), channels[2])
+    alpha = lightness.point(
+        lambda value: max(0, min(255, round(
+            (value - WHITE_THRESHOLD) * 255 / WHITE_RANGE
+        )))
+    )
+    image = Image.new("RGBA", reference.size, WHITE)
+    image.putalpha(alpha)
+    return image
+
+
+def centered(canvas, mark):
+    """将标识按可见边界居中，不包含字体基线额外留白。"""
+    origin = ((canvas.width - mark.width) // 2, (canvas.height - mark.height) // 2)
+    canvas.alpha_composite(mark, origin)
+    return canvas
+
+
+def scaled_wordmark(mark, width):
+    """等比缩放字标，所有输出共用同一字形。"""
+    height = round(mark.height * width / mark.width)
+    return mark.resize((width, height), RESAMPLE)
+
+
+def splash_icon(master, size):
+    """仅启动图烘焙圆角；桌面图标保留系统负责的裁切。"""
+    image = master.resize((size, size), RESAMPLE).convert("RGBA")
+    mask = Image.new("L", (MASTER_SIZE, MASTER_SIZE))
+    radius = MASTER_SIZE * SPLASH_RADIUS / SPLASH_SIZE
+    ImageDraw.Draw(mask).rounded_rectangle(
+        (0, 0, MASTER_SIZE - 1, MASTER_SIZE - 1), radius=radius, fill=255
+    )
+    image.putalpha(mask.resize((size, size), RESAMPLE))
+    return image
+
+
+def save(image, target):
+    """写入明确路径的生成资源，不清理或删除目录。"""
+    target.parent.mkdir(parents=True, exist_ok=True)
+    image.save(target, optimize=True)
+
+
+def ios_assets(master):
+    """严格按资源目录声明导出图标；开屏保留确认的完整参考图。"""
+    app_icons = IOS / "AppIcon.appiconset"
+    manifest = json.loads((app_icons / "Contents.json").read_text())
+    for entry in manifest["images"]:
+        points = float(entry["size"].split("x")[0])
+        scale = int(entry["scale"].removesuffix("x"))
+        pixels = round(points * scale)
+        save(master.resize((pixels, pixels), RESAMPLE), app_icons / entry["filename"])
+    for scale in (1, 2, 3):
+        suffix = "" if scale == 1 else f"@{scale}x"
+        size = tuple(value * scale for value in LAUNCH_SIZE)
+        image = Image.open(LAUNCH_REFERENCE).convert("RGB").resize(size, RESAMPLE)
+        save(image, IOS / f"LaunchImage.imageset/LaunchImage{suffix}.png")
+
+
+def android_assets(master, foreground):
+    """覆盖现有密度资源，并为 Android 12 提供独立安全区标识。"""
+    for density, scale in DENSITIES.items():
+        pixels = round(LEGACY_SIZE * scale)
+        save(
+            master.resize((pixels, pixels), RESAMPLE),
+            ANDROID / f"mipmap-{density}/ic_launcher.png",
+        )
+        pixels = round(FOREGROUND_SIZE * scale)
+        save(
+            foreground.resize((pixels, pixels), RESAMPLE),
+            ANDROID / f"drawable-{density}/ic_launcher_foreground.png",
+        )
+        save(
+            Image.new("RGB", (pixels, pixels), BRAND_RED),
+            ANDROID / f"mipmap-{density}/ic_launcher_background.png",
+        )
+        mark = splash_icon(master, round(SPLASH_SIZE * scale))
+        save(mark, ANDROID / f"drawable-{density}/splash_screen.png")
+        size = round(ANDROID12_SIZE * scale)
+        image = centered(Image.new("RGBA", (size, size), CLEAR), mark)
+        save(image, ANDROID / f"drawable-{density}/android12splash.png")
+
+
+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)
+    foreground = mark.resize((MASTER_SIZE, MASTER_SIZE), RESAMPLE)
+    save(master, ASSETS / "ymb.png")
+    save(foreground, ASSETS / "ymb_foreground.png")
+    placeholder = centered(
+        Image.new("RGBA", PLACEHOLDER_SIZE, CLEAR),
+        scaled_wordmark(mark.crop(mark.getbbox()), PLACEHOLDER_SIZE[0]),
+    )
+    save(placeholder, ASSETS / "splash_logo.png")
+    icon = splash_icon(master, SPLASH_SIZE * 4)
+    size = ANDROID12_SIZE * 4
+    save(
+        centered(Image.new("RGBA", (size, size), CLEAR), icon),
+        ASSETS / "ymb_android12.png",
+    )
+    ios_assets(master)
+    android_assets(master, foreground)
+    print("Generated ymb assets: master 1024, iOS catalog, Android 5 densities.")
+
+
+if __name__ == "__main__":
+    main()