border-image градиентом
by Ankhena
HTML
<br>
<div class="gradient">
Lorem ipsum
</div>
CSS
.gradient {
height: 30px;
width: 20%;
margin: 0 auto;
border: 5px solid transparent;
border-image: linear-gradient(150deg,#adf2f7 10%, transparent 30%, transparent 70%, #adf2f7 90%);
border-image-slice: 1;
}