.contact_item1{
    width:85%;
}

@media screen and (max-width:1600px) {
    .header .content .center .nav li a{
        padding: 0 10px;
    }
}
@media screen and (max-width:1366px) {
    .header .content .center .nav li a{
        padding: 0 5px;
    }
}
@media screen and (max-width:768px) {
    .contact_item1{
        width:100%;
    }

}