* {margin: 0;padding: 0;}
.pic {
  display: block;
  margin: 20px auto;
}
.col-md-12 {
  margin: 0;
  padding: 0
}
#pcCon {
  background:#f4f4f4
}
.downCon {
  width: 1000px;
  margin: 0 auto
}
.downCon a {
  margin: 40px 80px;
  float: left;
}
.container-fl {
   padding: 0 15px;
   margin: 0 auto
}
.visible-xs {
  background: url("../images/1.png");
  background-size: 100% 100%;
}

@media screen and (min-width: 1024px) {
  .col-md-12 img {
    width: 60%;
  }
  .container-fl {
    width: 1100px;
  }


}