body,
html {
  font-family: "Helvetica Neue",Helvetica,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","微软雅黑",Arial,sans-serif;
}

body {
  margin: 0;
}

.t-center {
  text-align: center;
}

.app-fade-in {
  animation: fade-in 350ms ease-in-out forwards;
}

@keyframes fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}