.about{
  width:100%;
  height: 640px;
  margin-top:20px;
  background: #fff;
  padding:0 20px;
  box-sizing: border-box;
  font-size:16px;
  color:#333333;
  font-family:"新宋体";
}
.about h1{
  font-size:24px;
  line-height: 80px;
  text-align: center;			
}
.about h3{
  font-size:20px;
  color:#1AB67A;
}	
.ab_b1{
  margin-bottom: 60px;			
}
b{
  display: block;
  font-size:19px;
  color:#FF5217;
  margin-top:60px;			
}
p{
  margin:5px 0;
}