body {
  background: #F2F2F2;
}
.about .about-nav {
  width: 1100px;
  margin: 0 auto;
  background: #FFFFFF;
  margin-top: 16px;
  margin-bottom: 50px;
}
.about .about-nav .list {
  margin-left: 20px;
  padding-top: 30px;
}
.about .about-nav .list span {
  line-height: 17px;
  font-family: PingFangSC-Regular;
  font-size: 12px;
  color: #272727;
  letter-spacing: 0;
}
.about .about-nav .list span:last-child {
  color: #2D85AE;
}
.about .about-nav .key {
  width: 100%;
  height: 1px;
  background: #E4E4E4;
  margin-top: 12px;
}
.about .about-nav ul {
  margin-top: 30px;
}
.about .about-nav ul li {
  float: left;
  width: 340px;
  margin-left: 18px;
  margin-bottom: 44px;
  border: 1px solid #d5d5d5;
}
.about .about-nav ul li a {
  display: block;
}
.about .about-nav ul li a .news-img {
  width: 338px;
  height: 230px;
  line-height: 227px;
  text-align: center;
  margin: 0 auto;
}
.about .about-nav ul li a .news-img img {
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 100%;
  vertical-align: middle;
}
.about .about-nav ul li a .ping {
  height: 44px;
}
.about .about-nav ul li a .ping p {
  display: block;
  width: 98%;
  margin: 0 auto;
  margin-top: 20px;
  max-height: 44px;
  text-align: center;
  line-height: 22px;
  font-family: PingFangSC-Regular;
  font-size: 16px;
  color: #515151;
  letter-spacing: 0;
}
.about .about-nav .fenye {
  margin-top: 10px;
  padding-bottom: 50px;
}