.content ul{
    margin: 50px 0 120px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}
.content ul li{
    position: relative;
    width: 31.2%;
    background: #fff;
    margin-top: 30px;
}

.content ul li .line{
    content: '';
    width: 2px;
    height: 38px;
    background: #B01F2E;
    position: absolute;
    top: 50%;
    left: 0;
    transform: translate(50%,-50%);
}
.content ul::after{
    content: '';
    width: 31.2%;
    border:1px solid transparent;
}
.content ul li .nav-box{
    display: block;
    width: 100%;
    line-height: 78px;
    padding-left: 30px;
    font-size: 18px;
    font-weight: 400;
    color: #B01F2E;
    cursor: pointer;
}
.content ul li::before{
    content: '';
    position: absolute;
    width: 2px;
    height: 38px;
    top: 50%;
    left: 0;
    background: #B01F2E;
    transform: translate(50%,-50%);
}
.content ul li .current{
    color: #FFAF24;
}
.content ul .active{
    background: url("../../../images/thirdnav_bg.jpg")center center no-repeat;
    background-size: cover;
    color: #B01F2E;
}
.content ul .current{
    background: url("../../../images/thirdnav_bg.jpg")center center no-repeat;
    background-size: cover;
    color: #B01F2E;
}
 .content ul li:hover::before {
     background: #FFAF24;
     z-index: 20;
 }
.content ul li:hover .nav-box{
    color: #FFAF24;
}

@media (max-width: 768px) {
    .content ul{
        margin: 15px 0 80px;
    }
    .content ul li{
        width: 100%;
        margin-top: 15px;
    }
    .content ul li .nav-box{
        font-size: 16px;
        line-height: 60px;
        padding-left: 22px;
    }
    .content ul li .line{
        height: 36px;
    }
}