.main-box .header .slogan {
  height: 16px;
  line-height: 16px;
  font-size: 16px;
  padding-top: 15px;
  color: #666;
}
.main-box .header .top-img {
  border-bottom: 1px solid #e6e6e6;
}
.main-box .header .top-nav {
  height: 90px;
  background-color: #fff;
  display: flex;
  justify-content: space-between;
}
.main-box .header .top-nav .nav-active {
  position: relative;
}
.main-box .header .top-nav .nav-active a {
  color: #008b93;
}
.main-box .header .top-nav li {
  text-align: center;
  margin: auto 0;
  cursor: pointer;
}
.main-box .header .top-nav li a h3 {
  font-size: 20px;
}
.main-box .header .top-nav li a h4 {
  font-size: 16px;
}
.main-box .header .top-nav li a:hover {
  color: #008b93;
}
.main-box .header .top-nav .nav-active:after {
  position: absolute;
  content: "";
  display: block;
  width: 60px;
  height: 2px;
  background-color: #008b93;
  bottom: -6px;
  left: 50%;
  margin-left: -30px;
}