body{
    display: none;
    /*opacity: 0;*/
}
@media (max-width: 800px) {
    .top-nav{
        display: none;
    }
}
body,ul,li{
    list-style:none;
}
button{
    outline:none;
}
.clearfix:after{
    display:block;
    clear:both;
    content:"";
    visibility:hidden;
    height:0
}
.clearfix{
    zoom:1;
}
a:link{
    text-decoration:none;
}
a:visited{
    text-decoration:none;
}
a:hover{
    text-decoration:none;
}
a:active{
    text-decoration:none;
}