<div class="container">
<div class="glass">
Hello World
</div>
</div>
.container {
background: url('https://image.zhangxinxu.com/image/study/s/s512/mm.jpg');
height: 341px;
display: flex;
align-items: center;
justify-content: center;
}
.glass {
padding: 10px;
backdrop-filter: blur(8px);
background-color: rgba(255, 255, 255, 0.25);
}