body {
  margin: 0;
  font-family: 'pingfang SC', 'helvetica neue', arial, 'hiragino sans gb', 'microsoft yahei ui', 'microsoft yahei', simsun, sans-serif;
  min-width: 1200px;
}

iframe {
  margin: 0;
  width: 100%;
  min-width: 1220px;
  height: calc(100vh - 53px);
}