BODY { 
  font-size: 16px;
  font-family: simsun,NSimSun,STSong;
  color: black; 
  letter-spacing:0.2px;
  line-height:29.3px;
  margin-right: 3.5%; 
  margin-left: 3.5%;
}

h1 {
  font-size: 24px;
  font-family: simsun,"宋体", NSimSun,STSong;
  line-height: 2; 
  margin-top: 1em;
}

.center {
  text-align: center;
}

.blue {
  color: blue; 
}