.header3-wrapper {
  position: fixed;
  width: 100%;
  top: 0;
  left: 0;
  box-shadow: 0px 2px 18px -6px rgba(0, 0, 0, 0.14);
  z-index: 900;
  background: #fff;
  font-size: 0;
}

.header3-wrapper .logo {
  float: left;
}

.header3-wrapper .logo .back-img {
  width: 0.12rem;
  height: 0.12rem;
  margin-top: .09rem;
  margin-left: .17rem;
  vertical-align: middle;
}

.header3-wrapper .logo .logo-img {
  width: 0.81rem;
  height: 0.26rem;
  margin-top: .09rem;
  margin-left: .07rem;
  vertical-align: middle;
}

.header3-wrapper .header3-menu-box {
  float: right;
}

.header3-wrapper .header3-menu-box .header3-menu .header3-menu-item {
  float: left;
  height: 0.44rem;
  line-height: 0.44rem;
  margin-right: .24rem;
  font-size: 0.15rem;
  text-align: center;
  color: #000;
}

.header3-wrapper .header3-menu-box .header3-menu .header3-menu-item:last-child {
  margin-right: .14rem;
}