Below code explains to display rounded corners for a section.
In Less stylesheet,
@radius: 5px;
@border: 1px solid black;
.rounded_corners {
border: @border;
-moz-border-radius: @radius;
-webkit-border-radius: @radius;
border-radius: @radius;
}
In View page,
<div class="rounded_corners">
Hello.....
</div>