.more{width:80%; height:2.1em; border:1px solid #cc5537; margin-top:8%; margin-bottom:8%; margin-left:9%;text-align:center; padding-top:1.5%; color:#cc5537;}

学习时代
body {margin-left: 0px;margin-top: 0px;margin-right: 0px;margin-bottom: 0px;max-width:640px;margin:0 auto;}