.section_main{
    background: #fff;
    padding-bottom: 50px;
    position: relative;
    z-index: 1;
}
.section_title{
  margin: 0;
  padding-top: 50px;
  padding-bottom: 20px;
  color: #222222;
  font-size: 32px;
  line-height: 40px;
   font-weight:bold;
}
.section_sub_title{
  font-size: 18px;
  border-bottom: 1px solid #ECEBF0;
  line-height: 78px;
  color: #222222;
  font-weight:bold;
}
.section_des{
  font-size:16px;line-height: 22px;color: #666666;margin-top: 30px;
  margin-bottom: 26px;

}
.section_box{
    background:#f5f3f3;padding: 20px; padding-top:0px;
}
.section_box .title{
font-weight:bold;color:#222222;font-size:18px;line-height: 20px;margin:0;padding-top: 22px;padding-bottom: 18px;
}
.section_box .sub_title{
  color:#666;font-size:16px;line-height: 20px;
}