JSFiddle - React, Tailwind, and code Playground
HTML
<li>
<div class="background-image"></div>
<div class="content">
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Duis aliquam eratla ipsum. Etiam at nisl eu felis vulputate porta.</p>
<p>Fusce ut placerat eros. Aliquam consequat in augue sed convallis. in sagittis. In suscipit in est et vehicula.</p>
</div>
</li>
CSS
.background-image {
position: fixed;
left: 0;
right: 0;
z-index: 1;
display: block;
background-image: url("http://666a658c624a3c03a6b2-25cda059d975d2f318c03e90bcf17c40.r92.cf1.rackcdn.com/unsplash_527bf56961712_1.JPG");
width: 1200px;
height: 800px;
-webkit-filter: blur(5px);
-moz-filter: blur(5px);
-o-filter: blur(5px);
-ms-filter: blur(5px);
filter: blur(5px);
}
.content {
position: fixed;
left: 0;
right: 0;
z-index: 9999;
margin-left: 20px;
margin-right: 20px;
}