Button in About Us Section

/* Inside Index Page in About Us Section */
<center><div class="about_us_collection">10% Off  </br> Your Collection Order</div></center>
</br>

/* In HeadHTML Section */
.about_us_collection{
background:#1f1f1f!important;
text-align:center;
color:#fff!important;
width:50%!important;
}
@media only screen and (max-width: 524px){
div.about_us_collection{
width:100%!important;
}
}