@media screen and (max-width: 780px){
    .joinlayer {
        margin-top: 10px;
    }
    .jointitle {
        font-size: 22px;
    }
    .joinus {
        font-size: 14px;
    }
    .am-panel-group {
        margin-top: 2rem;
        width:100%;
    }
    .am-panel{
        width:96%;
        margin-left: 2%;
        margin-right: 2%;
    }
    .am-panel-default>.am-panel-hd {
        height: 50px;
        line-height: 50px;
        font-size: 16px;
        padding-left: 10px;
    }
    .am-panel-bd {
        padding-left: 10px;
        font-size: 14px;
    }
    .am-panel-group {
        margin-bottom: 0;
    }
    .post-email {
        
        
        padding-top: 10px;
        padding-bottom: 10px;
        font-size: 14px;
    }
}