*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: Source Han Sans CN;
}

ul {
  list-style: none;
}

a {
  text-decoration: none;
}

.container {
  position: relative;
  margin: 0 auto;
}