.nav-down{
    background: #ffffff;
    display: none;
    padding-top: 20px;
    margin-top: 0;
    padding-bottom: 20px;
    margin-bottom: 0;
    border: 1px solid #888888;
    /*border-right: 1px solid #888888;*/
    /*border-bottom: 1px solid #888888;*/
    z-index: 5000;

}

.about-us li ,.technical-support li{
    text-align: center;

    line-height: 30px;
    color: #333333;
    height: 40px;

}


.about-us{
    position: absolute;
    left: 0;
    top: 80px;
    width:120px;
    /*height: 150px;*/
    height: auto;
    text-align: center;

}
.technical-support{
    position: absolute;
    left: 0;
    top: 80px;
    width:120px;
    height: auto;
    text-align: center;

}
.product-center{
    position: absolute;
    left: -680px;
    top: 80px;
    width: 1900px;
    height: auto;
    /*height: 483px;*/
}

.solution{
    position: absolute;
    left: -820px;
    top: 80px;
    width: 1900px;
    /*height: 483px;*/
    height: auto;
}
.product-center li,.solution li{
    display: inline-block;
    width: 250px;
    line-height: 30px;

}

.solution >li a  p img {
    text-align: center;
    /*margin-top: 10px;*/
    /*margin-bottom: 10px;*/
    width: 100px;
    height: 100px;
}

.product-center li .p1,.solution li .p1{
    font-size: 16px;

}

.about-us li a ,.technical-support li a{
    font-size: 16px;
}