.main {
  padding-top: 40px;
  padding-bottom: 60px;
}

.factory ul {
  margin: 0 0 0 -2%;
}

.factory ul li {
  float: left;
  width: 31.3333333%;
  margin: 0 0 20px 2%;
  text-align: center;
}

.factory ul li a {
  display: block;
  width: 100%;
  overflow: hidden;
}

.factory ul li img {
  width: 100%;
  display: block;
}

.factory ul li p {
  font-size: 15px;
  margin: 10px 0 0 0;
  color: #252525;
}

@media screen and (max-width:768px) {
  .main {
    padding-top: 25px;
    padding-bottom: 30px;
  }

  .factory ul li {
    float: left;
    width: 48%;
    margin: 0 0 15px 2%;
  }
}