.wt_header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 99;
  box-shadow: 0px 2px 8px 0px rgba(0, 0, 0, 0.04);
  background-color: #fff;
}
.wt_header .head {
  height: 80px;
  padding: 18px 0;
}
.wt_header .head .head_left {
  float: left;
  height: 100%;
  display: flex;
  align-items: center;
}
.wt_header .head .head_center {
  float: left;
  margin-left: 36px;
  height: 100%;
}
.wt_header .head .head_center ul {
  display: inline-block;
}
.wt_header .head .head_center li {
  display: inline-block;
  padding: 0 24px;
  height: 100%;
  line-height: 44px;
  font-size: 18px;
  position: relative;
}
.wt_header .head .head_center li .sub_menu {
  display: none;
  position: absolute;
  left: -5px;
  width: 150px;
  padding-bottom: 5px;
  padding-top: 18px;
  text-align: center;
  background: #ffffff;
  border-radius: 0px 0px 6px 6px;
  z-index: 999;
}
.wt_header .head .head_center li .sub_menu a {
  display: block;
  font-size: 16px;
  color: #333333;
  line-height: 48px;
  text-decoration: none;
}
.wt_header .head .head_center li .sub_menu a:hover {
  color: #008cf4;
}
.wt_header .head .head_center li .sub_menu a.active {
  color: #008cf4;
}
.wt_header .head .head_center li:hover > a {
  color: #008cf4;
}
.wt_header .head .head_center .active > a {
  color: #008cf4;
  font-weight: 600;
}
.wt_header .head .head_center img {
  width: 168px;
  height: 36px;
  margin-right: 36px;
}
.wt_header .head .head_right {
  float: right;
}