.navbar-default .navbar-nav>li:nth-child(3)::after{
    content: '' !important;
    position: absolute;
    bottom: 20px;
    left: 26%;
    width: 50%;height: 4px;
    background-color: #037FFE;
}
@media (max-width: 768px) {
    .navbar-default .navbar-nav>li:nth-child(3)::after{
        display: none !important;
    }
}
.navbar-default .navbar-nav > li:nth-child(3) > a {
    color: #037FFE !important;
}
.banner{text-align:center;color: #fff;background:url(../images/homesectino1.png);background-size:100% 100%;}

#bbs{
    padding: 111px 0 94px 0;
}