.header {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  position: fixed;
  top: 0;
  width: 100%;
  height: 4.65vw;
  line-height: 4.65vw;
  overflow: hidden;
  padding: 0 5.55vw;
  text-align: center;
  z-index: 1000;
  /* background: rgba(255, 255, 255, 0); */
  background: #fff;
  -webkit-box-sizing: border-box;
          box-sizing: border-box;
}
/* logo */
.logo {
  position: relative;
  float: left;
}
.logo img {
  width: 7.29vw;
  /* height: 52px; */
  margin: 1.28vw 0;
}
.blueLogo {
  position: absolute;
  left: 0;
  top: 0;
}
/* tab导航 start */
.tab {
  -webkit-box-flex: 1;
      -ms-flex: 1;
          flex: 1;
  height: 100%;
  line-height: 4.65vw;
}
.tab ul {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: horizontal;
  -webkit-box-direction: normal;
      -ms-flex-direction: row;
          flex-direction: row;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  height: 100%;
}
.tab li {
  float: left;
  text-align: center;
  margin-right: 2.5vw;
  line-height: 4.65vw;
}
.tab .active a {
  opacity: 1;
  border-bottom: 3px solid #1a7bff;
}
.tab li a {
  display: inline-block;
  height: 100%;
  font-size: 1.04vw;
  /* color: #fff; */
  color: #3d3d3d;
  opacity: 0.7;
}
.tab li a:hover {
  opacity: 1;
  border-bottom: 3px solid #1a7bff;
  text-decoration: none;
}
/* tab导航 end */
/* 登录注册按钮 start */
.loginAndRegister {
  float: right;
}
.loginAndRegister a {
  display: inline-block;
  padding: 0.1vw 1.05vw;
  line-height: 1.93vw;
  border-radius: 5px;
  color: #fff;
  font-size: 0.83vw;
  border: 1px solid #fff;
  background: #1a7bff;
}
.loginAndRegister a.userName {
  border: none;
  background: transparent;
  color: #3d3d3d;
}
.loginAndRegister a.userName span {
  display: inline-block;
  height: 100%;
  font-size: 0.83vw;
  color: #3d3d3d;
}
.login a {
  /* border: none; */
  color: #1a7bff;
  border: 1px solid #1a7bff;
  background: transparent;
}
.ul_display_none {
  display: none;
}
/* 登录注册按钮 end */
/* 下拉菜单 start */
.listBox {
  display: none;
  position: fixed;
  top: 4.65vw;
  width: 100%;
  padding: 1.66vw 0 1.38vw;
  background-color: #ffffff;
  -webkit-box-shadow: 0vw 0.36vw 3.07vw 0vw rgba(0, 0, 0, 0.16);
          box-shadow: 0vw 0.36vw 3.07vw 0vw rgba(0, 0, 0, 0.16);
  opacity: 0.92;
  z-index: 1000;
}
.listBox ul {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: horizontal;
  -webkit-box-direction: normal;
      -ms-flex-direction: row;
          flex-direction: row;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  height: 100%;
}
.listBox ul li {
  float: left;
  text-align: left;
  margin-right: 2.77vw;
}
.listBox ul li .listTitle {
  font-size: 0.95vw;
  line-height: 2vw;
  letter-spacing: 1px;
  color: #3d3d3d;
  font-weight: 700;
}
.listBox ul li .listItem a p {
  line-height: 1.65vw;
  font-size: 0.83vw;
  color: #4b4b4b;
}
/* 下拉菜单 end */

/*  */
.menu-mobile, .menuBtn {
  display: none;
}
/*  */
a:link {
  text-decoration: none;
  /* 指正常的未被访问过的链接*/
}

a:visited {
  text-decoration: none;
  /*指已经访问过的链接*/
}

a:hover {
  text-decoration: none;
  /*指鼠标在链接*/
}

a:active {
  text-decoration: none;
  /* 指正在点的链接*/
}