.header nav{display:none}.header,.content,.footer{text-align:center}.header,.footer{font-size:16px;font-weight:700;color:#fff;line-height:50px;-moz-box-sizing:border-box;box-sizing:border-box;width:30px;padding:0 0;float:left;position:relative}.header.fixed{position:fixed;top:0;left:0}.footer.fixed{position:fixed;bottom:0;left:0}.header a{display:block;width:30px;height:18px;padding:0;margin:5px;position:absolute;top:10px;left:0;margin:7px auto}.header a:before,.header a:after{content:'';display:block;background:#fff;height:3px}.header a span{background:#fff;display:block;height:3px;margin:6px 0}.content{padding:150px 50px 50px}@media only screen and (min-width:1200px){.header{display:none}}