.slick-slide img{}
.nav_bg {
    width: 100%;
    position: absolute;
    bottom: 0;
    z-index: 3;}
.nav {
    height: 100px;}
.top_box {
    width: 1200px;
    margin-left: auto;
    margin-right: auto;}
.top .nav ul>li {
    line-height: 100px;
    height: 100px;
    position: relative;
    text-align: center;}

.top .nav ul>li>a {
    display: inline-block;
    font-size:2rem;
    color: #fff;
    padding: 0 26px;}

.top .nav ol {
    position: absolute;
    left: 0;
    top: 97px;
    width: 200px;
    background: #8f0607
;}
.top .nav ol:before {
    width: 17px;
    height: 6px;
    position: absolute;
    left: 50%;
    margin-left: -8px;
    top: -33px;}
.top .nav ol>li {
    font-size: 1.6rem;
    color: #fff;
    line-height: 45px;
    text-align: center;}