.pb1{
 width:100%;
  margin-top:30px;
  margin-bottom:30px;
}
.pb1-1{
  float:left;
  width:30%;
  margin-right:5%;
  margin-bottom:24px;
}
.pb1-2{
  float:left;
  width:30%;
  margin-bottom:24px;
}
.pb2-1{
  float:left;
  width:48%;
  margin-right:4%;
  margin-bottom:24px;
}
.pb2-2{
  float:left;
  width:48%;
  margin-bottom:24px;
}
.pb1-e{
clear:both;
}
.pb1 img{
 width:100%;
}