您能否尝试一下，看看这是否是您想要实现的目标

import 'dart:ui';

import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
        title: 'Flutter Demo',
        theme: ThemeData(
          primarySwatch: Colors.blue,
          useMaterial3: true,
        ),
        home: const MyHomePage());
  }
}

class MyHomePage extends StatelessWidget {
  const MyHomePage({super.key});

  @override
  Widget build(BuildContext context) {
    final mediaQuery = MediaQuery.of(context);
    final screenWidth = mediaQuery.size.width;
    final screenHeight = mediaQuery.size.height;

    return Scaffold(
      body: SizedBox(
        width: screenWidth,
        height: screenHeight,
        child: Stack(
          children: [
            Positioned(
              top: screenHeight * 0.1,
              child: ImageFiltered(
                imageFilter: ImageFilter.blur(
                    sigmaX: 150, sigmaY: 150, tileMode: TileMode.decal),
                child: Transform.translate(
                  offset: const Offset(-128, 0),
                  child: const DecoratedBox(
                    decoration: BoxDecoration(
                      shape: BoxShape.circle,
                      color: Color.fromARGB(255, 15, 196, 206),
                    ),
                    child: SizedBox(
                      height: 186,
                      width: 186,
                    ),
                  ),
                ),
              ),
            ),
            Positioned(
              bottom: screenHeight * 0.1,
              child: ImageFiltered(
                imageFilter: ImageFilter.blur(
                    sigmaX: 150, sigmaY: 150, tileMode: TileMode.decal),
                child: Transform.translate(
                  offset: Offset(screenWidth + 128 - 186, 0),
                  child: const DecoratedBox(
                    decoration: BoxDecoration(
                      shape: BoxShape.circle,
                      color: Color.fromARGB(255, 15, 196, 206),
                    ),
                    child: SizedBox(
                      height: 186,
                      width: 186,
                    ),
                  ),
                ),
              ),
            ),
            const Positioned(
              child: DecoratedBox(
                decoration: BoxDecoration(
                  image: DecorationImage(
                      opacity: 0.1,
                      image: AssetImage('assets/images/logo.png')),
                ),
                child: SizedBox.expand(),
              ),
            )
          ],
        ),
      ),
    );
  }
}