.el-footer,.el-header{background:#545c64;color:#333;text-align:center;line-height:60px;height:60px}.main{height:-webkit-calc(100% - 60px);height:-moz-calc(100% - 60px);height:calc(100% - 60px);-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box}