body {
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}
img {
  width: 100%;
}
header,
.container,
footer {
  display: flex;
  justify-content: center;
}

.container {
  width: 100%;
}

.entrance {
  width: 70%;
  margin: 0 auto;
}