.fa_hline {
width: 80%;
height: 1px;
background: #ddd;
margin: 30px auto 15px;
max-width: 450px;
position: relative;
}
.fa_hline span {
height: 3px;
top: -1px;
position: absolute;
left: 50%;
transform: translateX(-50%);
width: 50px;
background: #086ab5;
animation: fa_sumline_ani 5s linear infinite alternate;
}
@keyframes fa_sumline_ani{
0%{ width:20px;}
50%{ width:100px;}
100%{ width:20px;}
}
@-webkit-keyframes fa_sumline_ani /*Safari and Chrome*/
{
0%{ width:20px;}
50%{ width:100px;}
100%{ width:20px;}
}