.smartphone{position:relative;width:360px;height:640px;margin:auto;border:16px white solid;border-top-width:60px;border-bottom-width:60px;border-radius:36px;z-index:9}.smartphone:before{content:"";display:block;width:60px;height:5px;position:absolute;top:-30px;left:50%;transform:translate(-50%,-50%);background:#333;border-radius:10px}.smartphone .content{width:330px;height:570px;background:#fff;z-index:-1;position:absolute;margin-top:-20px}