body{
  background-color:#ffffff;
  margin:0;
  position:relative;
  width:100%;
  height:100vh;
}

h1,h2, h3, h4, h5, h6, a{
  font-family:system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  /*font-family:system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI',"Hiragino Sans GB", "Microsoft YaHei","WenQuanYi Micro Hei", sans-serif;*/
  font-weight: inherit;
}