Hello @tashitendrel,
The one you are referring to is not a classic headline. It is a feature list element. If you want to add an accent to that element as well, you will need this custom css code:
h4.x-feature-box-title {
display: inline-block;
width: auto !important;
position: relative;
}
h4.x-feature-box-title:before,
h4.x-feature-box-title:after {
content: "";
position: absolute;
top: 50%;
height: 1px;
width: 9999px;
display: block;
margin-top: -1px;
background-color: rgba(60,101,117,.5);
box-shadow: rgba(255,255,255,0.9) 1px 1px 0;
}
h4.x-feature-box-title:after {
left: 100%;
margin-left: 0.6em;
}
h4.x-feature-box-title:before {
right: 100%;
margin-right: 0.6em;
}
.x-feature-list {
overflow: hidden;
}
Hope this helps. Please let us know how it goes.