.lianxi {
    position: absolute;
    top:68%;
    left:18.7% ;
    width: 140px;
    height: 52px;
    background: #FBA629;
    border-radius: 56px 56px 56px 56px;
    font-weight: 500;
    font-size: 20px;

    line-height: 52px;
    text-align: center;
}
.lianxi a {
    color: #FFFFFF;
}
.net-ul {
    /*height: 800px;*/
    margin-top: 149px;

}
.net-ul li {
    float: left;
    width: 570px;
    height: 658px;
    background: #FFFFFF;
    box-shadow: 0 0 15px 0 rgba(0,0,0,0.1);
    border-radius: 20px 20px 20px 20px;
}
.net-ul li h5 {
    margin-top: 20px;
    margin-left: 194px;
    font-weight: bold;
    font-size: 32px;
    color: #333333;
    line-height: 60px;
}

.net-ul li p {
    margin-top: 20px;
    margin-left: 94px;
    width: 382px;
    font-weight: 500;
    font-size: 25px;
    color: #666666;
    line-height: 49px;

}
.net-bgimg {
    width: 100%;
    background-size:cover;
    height: 570px;
    background-image: url(/static/images/network_devices/Arista-bgimg.png);
    background-repeat: no-repeat;
}
.net-bgimg h4 {
    padding-top: 155px;
    font-weight: bold;
    font-size: 40px;
    color: #FFFFFF;
    line-height: 75px;
    text-align: center;
}
.net-bgimg p {
    margin-top: 65px;
    margin-left: 185px;
    width: 830px;
    font-weight: 500;
    font-size: 32px;
    color: #FFFFFF;
    line-height: 60px;
    text-align: center;
}