@media screen and (max-width: 960px) {
    #Wrap {
        width: 100%;
        margin: 0 auto;
    }
    body {
        font-size: 18px;
    }
    .header {
        width: 100%;
    }

}

@media screen and (max-width: 750px) {

}

@media screen and (max-width: 640px) {
    body {
        font-size: 16px;
    }
}

@media screen and (max-width: 480px) {

}