开发模式下一切正常，打包后，主题中的字体大小，和使用了的padding大小都失效了 #595

import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:xxxx/common/theme/color_scheme.dart';

final defaultTextStyle = TextStyle(
  fontSize: 14.sp,
  color: SimiColorScheme.textPrimary,
);

final specialNumberTextStyle = TextStyle(
  fontSize: 18.sp,
  fontFamily: 'DINPro',
  fontWeight: FontWeight.w500,
);

final specialTextStyle = TextStyle(
  fontSize: 18.sp,
  fontFamily: 'YouSheBiaoTiHei',
  fontWeight: FontWeight.bold,
);

final textTheme = TextTheme(
  headlineMedium: TextStyle(
    fontSize: 28.sp,
    fontWeight: FontWeight.bold,
  ),
  titleMedium: TextStyle(
    fontSize: 16.sp,
    fontWeight: FontWeight.bold,
  ),
  bodyLarge: TextStyle(
    fontSize: 18.sp,
    fontWeight: FontWeight.bold,
  ),
  bodyMedium: defaultTextStyle,
  bodySmall: TextStyle(
    fontSize: 12.sp,
    color: SimiColorScheme.textSecondary,
  ),
);

Widget app = ScreenUtilInit(
      designSize: const Size(375, 812),
      minTextAdapt: true,
      splitScreenMode: true,
      builder: (context, child) {
        return DefaultTextStyle(
          style: defaultTextStyle,
          child: GetMaterialApp(
            title: "XXXX",
            initialRoute: AppPages.INITIAL,
            getPages: AppPages.routes,
            theme: themeData,
            debugShowCheckedModeBanner: false,
            builder: FToastBuilder(),
          ),
        );
      },
    );