@import url(https://fonts.googleapis.com/css?family=Roboto&display=swap);body{font-family:PingFang SC,tahoma,Microsoft Yahei,helvetica,"sans-serif";background-image:linear-gradient(135deg,#5efce8 10%,#736efe);margin:0}@media screen and (min-width:640px){body{height:100vh;display:flex;flex-direction:column;justify-content:center}}