diff --git a/.gitignore b/.gitignore
index f3f466f..7ef0b14 100644
--- a/.gitignore
+++ b/.gitignore
@@ -32,7 +32,6 @@
 /build/
 
 # Web related
-lib/generated_plugin_registrant.dart
 
 # Symbolication related
 app.*.symbols
@@ -46,4 +45,4 @@ app.*.map.json
 /android/app/release
 
 *.properties
-.gradle
\ No newline at end of file
+.gradle
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 0b99953..78e7ad1 100644
--- a/android/app/src/main/res/drawable-v21/launch_background.xml
+++ b/android/app/src/main/res/drawable-v21/launch_background.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <layer-list xmlns:android="http://schemas.android.com/apk/res/android">
     <item>
-        <bitmap android:gravity="fill" android:src="@drawable/background"/>
+        <bitmap android:src="@drawable/background"/>
     </item>
-</layer-list>
\ No newline at end of file
+</layer-list>
diff --git a/android/app/src/main/res/drawable/launch_background.xml b/android/app/src/main/res/drawable/launch_background.xml
index 0b99953..78e7ad1 100644
--- a/android/app/src/main/res/drawable/launch_background.xml
+++ b/android/app/src/main/res/drawable/launch_background.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <layer-list xmlns:android="http://schemas.android.com/apk/res/android">
     <item>
-        <bitmap android:gravity="fill" android:src="@drawable/background"/>
+        <bitmap android:src="@drawable/background"/>
     </item>
-</layer-list>
\ No newline at end of file
+</layer-list>
diff --git a/android/app/src/main/res/values-v31/styles.xml b/android/app/src/main/res/values-v31/styles.xml
deleted file mode 100644
index 4332edb..0000000
--- a/android/app/src/main/res/values-v31/styles.xml
+++ /dev/null
@@ -1,18 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is off -->
-    <style name="LaunchTheme" parent="@android:style/Theme.Light.NoTitleBar">
-        <item name="android:windowSplashScreenBackground">@drawable/launch_background</item>
-        <item name="android:forceDarkAllowed">false</item>
-        <item name="android:windowFullscreen">true</item>
-    </style>
-    <!-- Theme applied to the Android Window as soon as the process has started.
-         This theme determines the color of the Android Window while your
-         Flutter UI initializes, as well as behind your Flutter UI while its
-         running.
-         
-         This Theme is only used starting with V2 of Flutter's Android embedding. -->
-    <style name="NormalTheme" parent="@android:style/Theme.Light.NoTitleBar">
-        <item name="android:windowBackground">?android:colorBackground</item>
-    </style>
-</resources>
\ No newline at end of file
diff --git a/android/app/src/main/res/values/styles.xml b/android/app/src/main/res/values/styles.xml
index 8e13a40..1da777c 100644
--- a/android/app/src/main/res/values/styles.xml
+++ b/android/app/src/main/res/values/styles.xml
@@ -7,6 +7,8 @@
         <item name="android:windowBackground">@drawable/launch_background</item>
         <item name="android:forceDarkAllowed">false</item>
         <item name="android:windowFullscreen">true</item>
+        <item name="android:windowDrawsSystemBarBackgrounds">true</item>
+        <item name="android:windowLayoutInDisplayCutoutMode">shortEdges</item>
     </style>
     <!-- Theme applied to the Android Window as soon as the process has started.
          This theme determines the color of the Android Window while your
@@ -17,4 +19,4 @@
     <style name="NormalTheme" parent="@android:style/Theme.Light.NoTitleBar">
         <item name="android:windowBackground">?android:colorBackground</item>
     </style>
-</resources>
\ No newline at end of file
+</resources>
diff --git a/ios/Runner/Assets.xcassets/BrandingImage.imageset/Contents.json b/ios/Runner/Assets.xcassets/BrandingImage.imageset/Contents.json
deleted file mode 100644
index 1271227..0000000
--- a/ios/Runner/Assets.xcassets/BrandingImage.imageset/Contents.json
+++ /dev/null
@@ -1,23 +0,0 @@
-{
-  "images" : [
-    {
-      "filename" : "BrandingImage.png",
-      "idiom" : "universal",
-      "scale" : "1x"
-    },
-    {
-      "filename" : "BrandingImage@2x.png",
-      "idiom" : "universal",
-      "scale" : "2x"
-    },
-    {
-      "filename" : "BrandingImage@3x.png",
-      "idiom" : "universal",
-      "scale" : "3x"
-    }
-  ],
-  "info" : {
-    "author" : "xcode",
-    "version" : 1
-  }
-}
diff --git a/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage.png b/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage.png
index 67774cf..71e9c81 100644
Binary files a/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage.png and b/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage.png differ
diff --git a/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@2x.png b/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@2x.png
index 67774cf..71e9c81 100644
Binary files a/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@2x.png and b/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@2x.png differ
diff --git a/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@3x.png b/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@3x.png
index 67774cf..71e9c81 100644
Binary files a/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@3x.png and b/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@3x.png differ
diff --git a/ios/Runner/Base.lproj/LaunchScreen.storyboard b/ios/Runner/Base.lproj/LaunchScreen.storyboard
index c9811f0..55c0cae 100644
--- a/ios/Runner/Base.lproj/LaunchScreen.storyboard
+++ b/ios/Runner/Base.lproj/LaunchScreen.storyboard
@@ -41,4 +41,4 @@
         <image name="LaunchImage" width="168" height="185"/>
         <image name="LaunchBackground" width="1" height="1"/>
     </resources>
-</document>
\ No newline at end of file
+</document>
diff --git a/ios/Runner/Info.plist b/ios/Runner/Info.plist
index 402fe85..c8e286e 100644
--- a/ios/Runner/Info.plist
+++ b/ios/Runner/Info.plist
@@ -46,4 +46,4 @@
 		<key>UIStatusBarHidden</key>
 		<true/>
 	</dict>
-</plist>
\ No newline at end of file
+</plist>
diff --git a/lib/app.dart b/lib/app.dart
index 28d785c..866e175 100644
--- a/lib/app.dart
+++ b/lib/app.dart
@@ -14,7 +14,6 @@ class App extends StatefulWidget {
 class _AppState extends State<App> {
   @override
   Widget build(BuildContext context) {
-    // TODO: implement build
     return LayoutScaffold(
       appBar: AppBar(
         title: const Text('满席'),
diff --git a/lib/common/access_control_filter.dart b/lib/common/access_control_filter.dart
index c707850..0606289 100644
--- a/lib/common/access_control_filter.dart
+++ b/lib/common/access_control_filter.dart
@@ -29,12 +29,12 @@ class AccessControlFilter extends StatefulWidget {
   }) : super(key: key);
 
   @override
-  _AccessControlFilterState createState() => _AccessControlFilterState();
+  AccessControlFilterState createState() => AccessControlFilterState();
 }
 
-class _AccessControlFilterState extends State<AccessControlFilter> {
+class AccessControlFilterState extends State<AccessControlFilter> {
   /// 登录状态
-  bool _isLogin = false;
+  final bool _isLogin = false;
 
   @override
   void initState() {
@@ -65,9 +65,13 @@ class _AccessControlFilterState extends State<AccessControlFilter> {
 
     // 缺省的未登录情况下的显示
     return Center(
-      child: RaisedButton(
-        color: Colors.blueAccent,
-        textTheme: ButtonTextTheme.primary,
+      child: ElevatedButton(
+        style: ElevatedButton.styleFrom(
+          backgroundColor: Theme.of(context).colorScheme.background,
+          textStyle: TextStyle(
+            color: Theme.of(context).colorScheme.primary
+          )
+        ),
         child: const Text('请先登录'),
         onPressed: () {
           Navigator.push(
diff --git a/lib/common/global.dart b/lib/common/global.dart
index bec09e9..b179957 100644
--- a/lib/common/global.dart
+++ b/lib/common/global.dart
@@ -70,7 +70,7 @@ class Global {
   static List<MaterialColor> get themes => _themes;
 
   // 是否为release版
-  static bool get isRelease => bool.fromEnvironment("dart.vm.product");
+  static bool get isRelease => const bool.fromEnvironment("dart.vm.product");
 
   //初始化全局信息，会在APP启动时执行
   static Future init() async {
@@ -80,13 +80,13 @@ class Global {
 
     // 初始化用户信息
     _prefs = await SharedPreferences.getInstance();
-    var _profile = _prefs?.getString("user_info");
-    if (_profile != null) {
+    var profile = _prefs?.getString("user_info");
+    if (profile != null) {
       try {
         if (kDebugMode) {
           print('开始读取用户信息...');
         }
-        profile = jsonDecode(_profile);
+        profile = jsonDecode(profile);
         if (kDebugMode) {
           print('用户信息读取成功');
         }
diff --git a/lib/layout/layout_scaffold.dart b/lib/layout/layout_scaffold.dart
index fb9d6c8..95a60e3 100644
--- a/lib/layout/layout_scaffold.dart
+++ b/lib/layout/layout_scaffold.dart
@@ -14,10 +14,10 @@ class LayoutScaffold extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     Text title = appBar.title as Text;
-    print(appBar.preferredSize);
 
     return Scaffold(
       appBar: PreferredSize(
+        preferredSize: const Size.fromHeight(60),
         child: AppBar(
           actions: appBar.actions,
           leading: appBar.leading,
@@ -34,7 +34,6 @@ class LayoutScaffold extends StatelessWidget {
             statusBarIconBrightness: Brightness.dark,
           ),
         ),
-        preferredSize: const Size.fromHeight(60),
       ),
       body: body,
     );
diff --git a/lib/life.dart b/lib/life.dart
index a1adc4b..2719186 100644
--- a/lib/life.dart
+++ b/lib/life.dart
@@ -125,7 +125,7 @@ class _LifeState extends State<Life> {
     return Card(
       key: ValueKey(item["id"]),
       elevation: 8,
-      color: Theme.of(context).backgroundColor,
+      color: Theme.of(context).colorScheme.background,
       child: Column(
         children: <Widget>[
           InkWell(
diff --git a/lib/main.dart b/lib/main.dart
index 7ac9d6e..8a9f55a 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -1,8 +1,9 @@
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 
 //import 'common/access_control_filter.dart';
-import 'package:flutter_native_splash/flutter_native_splash.dart'
-    if (dart.library.html) 'package:flutter_native_splash/flutter_native_splash_web.dart';
+import 'package:flutter_native_splash/flutter_native_splash.dart';
+// import 'package:flutter_native_splash/flutter_native_splash_web.dart';
 
 // import 'package:flutter_localizations/flutter_localizations.dart';
 import 'app.dart';
@@ -30,16 +31,15 @@ class Bistro extends StatelessWidget {
         primaryColor: const Color(0xFFff857a),
         // primaryColor: const Color(0xFF5f2500),
         primaryColorDark: Colors.white60,
-        backgroundColor: const Color(0xFFFFF7F8),
-        // backgroundColor: const Color(0xFFcf9237),
-        bottomAppBarColor: const Color(0xFFFFF7F8),
         appBarTheme: const AppBarTheme(color: Colors.white),
-        // appBarTheme: const AppBarTheme(color: Color(0xFF5f2500)),
+        bottomAppBarTheme: const BottomAppBarTheme(color: Color(0xFFFFF7F8)),
         colorScheme: ColorScheme.fromSwatch(
           primarySwatch: Colors.amber,
-        ).copyWith(
-          secondary: Colors.deepOrangeAccent,
-        ),
+        )
+            .copyWith(
+              secondary: Colors.deepOrangeAccent,
+            )
+            .copyWith(background: const Color(0xFFFFF7F8)),
       ),
       home: const BistroFrame(
         title: '小酒馆',
@@ -65,10 +65,10 @@ class BistroFrame extends StatefulWidget {
   final String title;
 
   @override
-  _BistroFrameState createState() => _BistroFrameState();
+  BistroFrameState createState() => BistroFrameState();
 }
 
-class _BistroFrameState extends State<BistroFrame> {
+class BistroFrameState extends State<BistroFrame> {
   late Widget _body;
   int _index = 3;
 
@@ -108,14 +108,14 @@ class _BistroFrameState extends State<BistroFrame> {
 
   void initData() {
     _body = IndexedStack(
-      children: <Widget>[
-        const App(),
-        News(),
-        News(),
-        const Life(),
-        const Mine(),
-      ],
       index: _index,
+      children: const <Widget>[
+        App(),
+        News(),
+        News(),
+        Life(),
+        Mine(),
+      ],
     );
   }
 
@@ -123,13 +123,21 @@ class _BistroFrameState extends State<BistroFrame> {
     // This is where you can initialize the resources needed by your app while
     // the splash screen is displayed.  Remove the following example because
     // delaying the user experience is a bad design practice!
-    print('ready in 3...');
+    // if (kDebugMode) {
+    //   print('ready in 3...');
+    // }
+    // await Future.delayed(const Duration(seconds: 1));
+    if (kDebugMode) {
+      print('ready in 2...');
+    }
     await Future.delayed(const Duration(seconds: 1));
-    print('ready in 2...');
+    if (kDebugMode) {
+      print('ready in 1...');
+    }
     await Future.delayed(const Duration(seconds: 1));
-    print('ready in 1...');
-    await Future.delayed(const Duration(seconds: 1));
-    print('go!');
+    if (kDebugMode) {
+      print('go!');
+    }
     FlutterNativeSplash.remove();
   }
 
@@ -148,12 +156,12 @@ class _BistroFrameState extends State<BistroFrame> {
       bottomNavigationBar: BottomAppBar(
         shape: const CircularNotchedRectangle(),
         child: Row(
-          children: bottomNavigationBarData,
           mainAxisAlignment: MainAxisAlignment.spaceAround,
+          children: bottomNavigationBarData,
         ),
       ),
       floatingActionButton: FloatingActionButton(
-        backgroundColor: Theme.of(context).backgroundColor,
+        backgroundColor: Theme.of(context).colorScheme.background,
         onPressed: () => {},
         child: Icon(
           Icons.search,
diff --git a/lib/mine/login.dart b/lib/mine/login.dart
index 6374271..3cbb78a 100644
--- a/lib/mine/login.dart
+++ b/lib/mine/login.dart
@@ -12,13 +12,12 @@ class Login extends StatefulWidget {
   }) : super(key: key);
 
   @override
-  _LoginState createState() => _LoginState();
+  LoginState createState() => LoginState();
 }
 
-class _LoginState extends State<Login> {
+class LoginState extends State<Login> {
   @override
   Widget build(BuildContext context) {
-    // TODO: implement build
     return Scaffold(
       appBar:  AppBar(
           title: const Text(
@@ -30,6 +29,6 @@ class _LoginState extends State<Login> {
           centerTitle: true,
         ),
       body: const Text('登录'),
-    );;
+    );
   }
 }
diff --git a/lib/news.dart b/lib/news.dart
index dd3d3e9..1ea2324 100644
--- a/lib/news.dart
+++ b/lib/news.dart
@@ -3,6 +3,8 @@ import 'package:flutter/material.dart';
 import 'layout/layout_scaffold.dart';
 
 class News extends StatelessWidget {
+  const News({Key? key}) : super(key: key);
+
   @override
   Widget build(BuildContext context) {
     return LayoutScaffold(
diff --git a/lib/router/router.dart b/lib/router/router.dart
index 3a2f2b9..82529a1 100644
--- a/lib/router/router.dart
+++ b/lib/router/router.dart
@@ -1,5 +1,5 @@
 import 'package:bistro/app.dart';
 
 var router = {
-  '/app': (context) => App(), //应用页
+  '/app': (context) => const App(), //应用页
 };
diff --git a/pubspec.yaml b/pubspec.yaml
index d135fce..88c0f0b 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -58,7 +58,7 @@ dependencies:
   dio_http_cache: ^0.3.0
 
   # 启动页
-  flutter_native_splash: ^2.2.0+1
+  flutter_native_splash: ^2.2.19
 
 dev_dependencies:
   flutter_test:
@@ -131,28 +131,29 @@ flutter_native_splash:
   # splash screen to a png image.  This is useful for gradients. The image will be stretch to the
   # size of the app. Only one parameter can be used, color and background_image cannot both be set.
 #  color: "#e1f5fe"
-  background_image: "res/assets/images/Splash.png"
+#  background_image: "res/assets/images/Splash.png"
 
   # Optional parameters are listed below.  To enable a parameter, uncomment the line by removing
   # the leading # character.
 
   # The image parameter allows you to specify an image used in the splash screen.  It must be a
   # png file and should be sized for 4x pixel density.
-#  image: assets/logo_lockup_flutter_vertical.png
+  # image: assets/logo_lockup_flutter_vertical.png
+#  image: "res/assets/images/Splash.png"
 
   # This property allows you to specify an image used as branding in the splash screen. It must be
   # a png file. Currently, it is only supported for Android and iOS.
-  #branding: assets/dart.png
+  branding: assets/dart.png
 
   # Specify your branding image for dark mode.
-  #branding_dark: assets/dart_dark.png
+  branding_dark: assets/dart_dark.png
 
   # To position the branding image at the bottom of the screen you can use bottom, bottomRight,
   # and bottomLeft. The default values is bottom if not specified or specified something else.
   #
   # Make sure this content mode value should not be similar to android_gravity value and
   # ios_content_mode value.
-  #branding_mode: bottom
+  branding_mode: bottom
 
   # The color_dark, background_image_dark, and image_dark are parameters that set the background
   # and image when the device is in dark mode. If they are not specified, the app will use the
diff --git a/web/index.html b/web/index.html
index e2deebd..aa2819a 100644
--- a/web/index.html
+++ b/web/index.html
@@ -1,6 +1,4 @@
-<!DOCTYPE html>
-<html>
-<head>
+<!DOCTYPE html><html><head>
   <!--
     If you are serving your web app in a path other than the root, change the
     href value below to reflect the base path you are serving from.
@@ -27,12 +25,12 @@
   <link rel="apple-touch-icon" href="icons/Icon-192.png">
 
   <!-- Favicon -->
-  <link rel="icon" type="image/png" href="favicon.png"/>
+  <link rel="icon" type="image/png" href="favicon.png">
 
   <title>bistro</title>
   <link rel="manifest" href="manifest.json">
   <script src="splash/splash.js"></script>
-  <meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" name="viewport"/>
+  <meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" name="viewport">
   <link rel="stylesheet" type="text/css" href="splash/style.css">
 </head>
 <body>
@@ -103,5 +101,5 @@
       loadMainDartJs();
     }
   </script>
-</body>
-</html>
\ No newline at end of file
+
+</body></html>
\ No newline at end of file
diff --git a/web/splash/splash.js b/web/splash/splash.js
index 898c454..3b6ed11 100644
--- a/web/splash/splash.js
+++ b/web/splash/splash.js
@@ -1,7 +1,5 @@
 function removeSplashFromWeb() {
-  const elem = document.getElementById("splash");
-  if (elem) {
-    elem.remove();
-  }
+  document.getElementById("splash")?.remove();
+  document.getElementById("splash-branding")?.remove();
   document.body.style.background = "transparent";
 }
diff --git a/web/splash/style.css b/web/splash/style.css
index deae8fc..c65db93 100644
--- a/web/splash/style.css
+++ b/web/splash/style.css
@@ -1,7 +1,11 @@
+html {
+  height: 100%
+}
+
 body {
-  margin:0;
-  height:100%;
-  background: #000000;
+  margin: 0;
+  min-height: 100%;
+  background-color: #ffffff;
   background-image: url("img/light-background.png");
   background-size: 100% 100%;
 }
@@ -32,12 +36,22 @@ body {
   object-fit: cover;
 }
 
-@media (prefers-color-scheme: dark) {
-  body {
-    margin:0;
-    height:100%;
-    background: #000000;
-    background-image: url("img/dark-background.png");
-    background-size: 100% 100%;
-  }
+.bottom {
+  position: absolute;
+  bottom: 0;
+  left: 50%;
+  -ms-transform: translate(-50%, 0);
+  transform: translate(-50%, 0);
+}
+
+.bottomLeft {
+  position: absolute;
+  bottom: 0;
+  left: 0;
+}
+
+.bottomRight {
+  position: absolute;
+  bottom: 0;
+  right: 0;
 }