.auth{width:100%;height:100%;background:url(../img/login.66294b01.jpg) no-repeat;background-size:cover;text-align:center;position:relative}.auth .box{width:100%;padding:20px;position:absolute;top:50%;-webkit-transform:translateY(-50%);transform:translateY(-50%)}.auth .box .logo{width:110px;height:110px;margin:0 auto}.auth .box .title{color:#fff;font-size:16px;margin-top:15px;margin-bottom:60px}.auth .box .login-btn{width:100%;color:#fff;border:1px solid #fff;border-radius:4px;padding:12px;font-size:15px}.auth .box .login-btn .fb{width:25px;height:25px;margin-right:10px}.auth .box .tips{color:#fff;margin-top:30px;font-size:13px}.auth .box .back{color:#fff;margin-top:30px;text-decoration:underline}