.navbar-collapse {
    position: relative;
    width: 100%;
    background: #fff;
    box-shadow: 0 8px 16px rgba(90, 89, 89, 0.2);
    z-index: 999;
}
.nav-contain {
    width: 1200px;
    margin: 0 auto;
}
.nav-farther {
    width: 100%;
    height: 50px;
}
.navbar-collapse._fix {
    position: fixed;
    top: 0;
}
.nav>li>a {
    color: #666666;
}
.nav>li>a:focus,
.nav>li.active a,
.nav>li>a:hover {
    color: #B81C22;
    background: none;
}
.nav>li>a:focus::after,
.nav>li>a:hover::after,
.nav>li.active ::after {
    content: '';
    position: absolute;
    width: 39px;
    bottom: 0;
    left: calc(50% - 19px);
    border-bottom: 5px solid;
}
.top-bar {
    width: 100%;
    height: 0px;
    background: #111111;
}
.form-group {
    position: relative;
}
.top-search {
    display: inline-block;
    position: absolute;
    top: 7px;
    right: 12px;
    width: 20px;
    height: 20px;
    background: url('../images/common/search.png') no-repeat center/contain;
    cursor: pointer;
}