@charset "utf-8";
@media screen and (max-width: 640px) { 
.top{display: none; border: 1px solid #f00;}
#header_form{display: none;}
.main{ width: 100%;}
.nav{display: none;}
.footer{display: none;}
.position{display: none;}
.main{ width: 100%;}
.agreement{ width: 100%;}
.articlesleft{display: none;}
.articlesright{  width: 100%; margin-left: 0px;border:none;background:none;}
.main2{ width: 100%;}


}