.nav {
  width: 1200px;
  margin: 0 auto;
}
.header {
  width: 100%;
  height: 100px;
  display: flex;
  display: -webkit-flex;
  align-items: center;
  justify-content: space-between;
}
.clearfix:after {
  content: ".";
  clear: both;
  height: 0;
  overflow: hidden;
  visibility: hidden;
  display: block;
}
.clearfix {
  zoom: 1;
}
.header_left {
  width: 455px;
  height: 62px;
  display: flex;
  display: -webkit-flex;
  align-items: center;
  justify-content: space-between;
}
.header_left a {
  display: flex;
  display: -webkit-flex;
}
.header_left .header_tit {
  text-align: center;
margin-top: 20px;}
.header_left .header_tit p {
  font-size: 22px;
  font-weight: bold;
  color: #49B849;
  line-height: 30px;
}
.header_logo {
  margin-right: 24px;
}
.header_logo img {
      height: 90px;
}
.header_right {
  position: relative;
}
.header_right ul li {
  float: left;
  margin-left: 34px;
  position: relative;
  height: 35px;
}
.header_right ul li a {
  font-size: 18px;
  font-weight: 400;
  color: #666;
}
.header_right ul li a:hover {
  color: #49B849;
}
.header_right ul .line a {
  color: #49B849;
  font-weight: bold;
}
.header_right ul li.line:before {
  content: '';
  width: 100%;
  height: 3px;
  background: #49B849;
  border-radius: 50px 50px 50px 50px;
  opacity: 1;
  position: absolute;
  bottom: -6px;
  left: 0;
}