:root {
  --default-font-family: PingFangSC-Regular,PingFangSC,Microsoft Yahei,sans-serif,Roboto,SF Pro SC,SF Pro Display,SF Pro Icons,BlinkMacSystemFont,-apple-system,Segoe UI,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,Helvetica,Arial;
}

.main-container {
  overflow: hidden;
}

.main-container,
.main-container * {
  box-sizing: border-box;
}

input,
select,
textarea,
button {
  outline: 0;
}