@media screen and (max-width:640px){

.div1,.div2,.div3,.div4{
    width: 640px;
}
.nav{    width: 288px;
}
.menu{
    padding-right: 176px;
    padding-left: 176px;
}
.snsBox{
    margin-left: 60px;
    margin-right: 60px;
}
#work{
    margin-left: 85px;
    margin-right: 85px;
}
form{
    width: 100%;
    height: auto;
    padding-right: 95px;
    padding-left: 95px;
    padding-top: 205;
    padding-bottom:205;

}
element.style{
    width: 640px;
}
}