@media all and (min-width:781px) {
    .footer {
        bottom: 0;
        width: 100%;
        height: 60px;
        line-height: 60px;
        background-color: #f5f5f5
    }

    #footer_container {
        width: auto;
        max-width: 680px;
        padding: 0 15px
    }
}

@media all and (max-width:780px) {
    .footer {
        bottom: 0;
        width: 100%;
        height: 60px;
        line-height: 60px;
        background-color: #f5f5f5
    }
}