html,body,div,ul,li,ol,a,input,textarea,p,dl,dt,dd{margin:0;padding:0;} ul li{list-style: none;} a{text-decoration: none;cursor: pointer;} html{height: 100%;} body{height: 100%;background: #f5f5f5;position: relative;font-family: '微软雅黑';max-width: 640