.header{position:fixed;height:40px;line-height:40px;background-color:#fff;box-shadow:0 0 2px 2px rgba(0,0,0,.02);text-align:center;z-index:1000}.footer,.header{width:100%}.content{min-height:600px;padding:0 50px}.footer-exp span{display:inline-block;margin-right:20px}