diff --git a/android/app/build.gradle.kts b/android/app/build.gradle.kts
index 22499b7..bc2e45c 100644
--- a/android/app/build.gradle.kts
+++ b/android/app/build.gradle.kts
@@ -35,6 +35,13 @@ android {
             ndk {
                 abiFilters += listOf("arm64-v8a", "armeabi-v7a")
             }
+            // R8 裁剪未使用的 Java/Kotlin 代码与资源，减小 dex 与 res。
+            isMinifyEnabled = true
+            isShrinkResources = true
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro",
+            )
             // TODO: Add your own signing config for the release build.
             // Signing with the debug keys for now, so `flutter run --release` works.
             signingConfig = signingConfigs.getByName("debug")
@@ -52,6 +59,9 @@ kotlin {
 androidComponents {
     onVariants(selector().withBuildType("release")) { variant ->
         variant.packaging.jniLibs.excludes.add("lib/x86_64/**")
+        // 原生库随 APK 压缩存储：下载体积明显小于解压后的体积，代价是安装时解压。
+        // 本包 90% 体积是 so，这一项对国内商店的 APK 分发影响最大。
+        variant.packaging.jniLibs.useLegacyPackaging = true
     }
 }
 
diff --git a/android/app/proguard-rules.pro b/android/app/proguard-rules.pro
new file mode 100644
index 0000000..eb2a8ef
--- /dev/null
+++ b/android/app/proguard-rules.pro
@@ -0,0 +1,11 @@
+# Author: fruit.com.cn
+#
+# R8 保号规则：Flutter 引擎与插件自带的 consumer rules 已覆盖大部分场景，
+# 这里只补本项目原生层通过反射/通道访问、裁剪后容易失效的入口。
+
+# 画中画与权限通道由 MainActivity 直接注册，保留应用包名下的入口类。
+-keep class com.stormg.lumadrama.** { *; }
+
+# Flutter 引擎在 release 下通过 JNI 回调这些类，禁止改名。
+-keep class io.flutter.** { *; }
+-dontwarn io.flutter.embedding.**
diff --git a/android/gradle.properties b/android/gradle.properties
index 19e019d..96c9d73 100644
--- a/android/gradle.properties
+++ b/android/gradle.properties
@@ -6,3 +6,8 @@ android.useAndroidX=true
 android.newDsl=false
 # This builtInKotlin flag was added by the Flutter template
 android.builtInKotlin=false
+
+# release 包默认剥离 Dart 调试符号并混淆：libapp.so 由 ~8MB 降到 ~1MB/ABI。
+# 符号表输出到 build/symbols，崩溃分析时用它还原堆栈，发布前务必归档。
+split-debug-info=build/symbols
+dart-obfuscation=true
diff --git a/pubspec.lock b/pubspec.lock
index 9d2f1e3..f6fdda0 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -105,14 +105,6 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.0.2"
-  cupertino_icons:
-    dependency: "direct main"
-    description:
-      name: cupertino_icons
-      sha256: "41e005c33bd814be4d3096aff55b1908d419fde52ca656c8c47719ec745873cd"
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "1.0.9"
   dio:
     dependency: "direct main"
     description:
diff --git a/pubspec.yaml b/pubspec.yaml
index 64d1b19..53a0714 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -33,9 +33,6 @@ dependencies:
   flutter:
     sdk: flutter
 
-  # The following adds the Cupertino Icons font to your application.
-  # Use with the CupertinoIcons class for iOS style icons.
-  cupertino_icons: ^1.0.8
   # 网络层用 dio（统一拦截器/超时/错误映射）；纯 Dart 无原生插件，仍然不引代码生成与图片缓存库
   dio: ^5.7.0
   provider: ^6.1.5+1
@@ -90,7 +87,8 @@ flutter:
     - assets/icon/splash_logo.png
     - assets/icon/splash_logo_android12.png
     - assets/icon/rail/
-    - assets/auth/
+    # 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
 
   # To add assets to your application, add an assets section, like this:
   # assets: