.entertop {
  margin-top: 10px;
  overflow: hidden;
  width: 100%;
  height: 220px;
  background-image: url('../imgs/entertop.png');
}
.entercon {
  width: 100%;
  height: 900px;
}
.entercon .aboutus {
  margin-top: -71px;
  margin-left: 100px;
  float: left;
  width: 290px;
  height: 282px;
  background-color: #eaeaea;
  overflow: hidden;
}
.entercon .aboutus div:nth-child(1) {
  width: 270px;
  height: 56px;
  background-color: #227dd8;
  font-size: 22px;
  color: #fff;
  font-weight: bold;
  padding: 10px 0 5px 20px;
}
.entercon .aboutus a {
  display: block;
  width: 100%;
  height: 55px;
  line-height: 55px;
  font-size: 14px;
  margin-left: 30px;
}
.entercon .aboutus a:nth-of-type(1) {
  color: #1e73be;
}
.entercon .aboutus .line {
  width: 150px;
  border: 1px solid #d6d6d6;
  margin-left: 30px;
}
.entercon .brief {
  float: right;
  width: 900px;
  height: 900px;
  margin-right: 100px;
}
.entercon .brief .top {
  font-size: 14px;
  color: #666;
  margin-top: 20px;
}
.entercon .brief h1 {
  font-size: 28px;
  color: #292929;
  padding: 20px 0;
}
.entercon .brief > span {
  color: black;
  font-size: 14px;
  line-height: 30px;
}
.entercon .brief > img {
  width: 900px;
  height: 400px;
  margin-top: 100px;
}