.abAs-top {
    width: 100%;
    height: 432px;
    overflow: hidden;
    background-size:cover !important;
}
.abAs-top>div {
    width: 100%;
    height: 434px;
    overflow: hidden;
    background: linear-gradient(90deg, #3E66CC 10%, rgba(62, 102, 204, 0) 100%), linear-gradient(180deg, rgba(62, 102, 204, 0.8) 15.63%, rgba(102, 145, 255, 0.2) 100%);
}
.abAs-top>div>.abAs-tops {
    width: 1440px;
    height: 434px;
    overflow: hidden;
    margin: 0 auto;
}
.abAs-top>div>.abAs-tops>h2 {
font-weight: 600;
  font-size: 40px;
  line-height: 56px;
  color: #FFFFFF;
  animation-duration: .6s;
  margin-top: 180px;
  text-align: center;
  letter-spacing: 4px;
}
.abAs-top>div>.abAs-tops>h3 {
width: 540px;
  font-weight: 400;
  font-size: 24px;
  line-height: 26px;
  color: #FFFFFF;
  animation-duration: .6s;
  text-align: center;
  margin: 0 auto;
  margin-top: 10px;
}

.nav_bar {
width: 100%;
  min-width: 1300px;
  height: 60px;
  line-height: 60px;
  background: #fff;
}
.nav_bar .common_width {
    width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
}
.clearfixnva {
    zoom: 1;
}
.nav_bar .nav_list li {
    width: 20%;
    float: left;
}
.nav_bar .nav_list li .nav_active, .nav_bar .nav_list li .nav_item:hover {
    background: #2D2D2D;
    color: #FFFFFF !important;
}
.nav_bar .nav_list li .nav_item {
    display: block;
    width: 130px;
    height: 60px;
    line-height: 60px;
    text-align: center;
    margin: 0 auto;
    color: #333333;
}