.intro_s1{
  text-align: center;
}
.pc{
  font-size: 18px;
  color: #0066FF;
}

.list{
  list-style: none;
    font-size: 18px;
    margin-top: 5px;
    padding-top: 20px;
    font-family: "Microsoft YaHei";
}

.intro_s2_intro1,.intro_s2_intro2,.intro_s2_intro3,.intro_s2_intro4{
  margin-top: 40px;
}
.title{
  float: left;
  margin-left: 80px;
}
.icon {
    margin-left: -30px;
    margin-top: 22px;
    float: left;
}
.su{
    font-size: 40px;
    color: #0066FF;
    margin-top: 20px;
}
.img{
  float: left;
}
*{
  font-family: 微软雅黑;
}