html,
body {
  width: 100vw;
  min-height: 100vh;
}

body {
  position: relative;
  overflow: auto;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizelegibility;
  text-size-adjust: 100%;
  -webkit-overflow-scrolling: touch;
  font-family: "黑体", "PingFang SC", "Microsoft YaHei", Helvetica, Arial,
    sans-serif;
  color: #333333;
  margin: 0;
}
.page-cnt {
  width: 100%;
  vertical-align: middle;
}

.code-img {
  position: fixed;
  width: 11.2vw;
  right: 6.7vw;
  bottom: 4vh;
}