#header {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 80px;
  z-index: 100;
  background: linear-gradient(
    180deg,
    rgba(0, 0, 0, 0.41) 0%,
    rgba(0, 0, 0, 0) 100%
  );
  padding: 0 124px;
  box-sizing: border-box;
  display:flex;
  justify-content:center;
}
.gaine {
    width:1670px;
  height: 80px;
  display: flex;
  justify-content: space-between; 
}

#nav-border {
    width: 20px;
    height: 3px;
    background: #f4a200;
    border-radius: 2px;
    position: relative;
    top:59px;
    left:74px;
    -webkit-transition: all .3s;
    -moz-transition: all .3s;
    -ms-transition: all .3s;
    transition: all .3s;
}
#header .nav_li:nth-of-type(1):hover~.nav-border{
    left:74px!important;
}
#header .nav_li:nth-of-type(2):hover~.nav-border{
    left:242px!important;
}
#header .nav_li:nth-of-type(3):hover~.nav-border{
    left:410px!important;
}
#header .nav_li:nth-of-type(4):hover~.nav-border{
    left:578px!important;
}

#header .nav_li:nth-of-type(2):hover > a{
    font-weight:normal;
    cursor:context-menu;
}
#header .nav_li:nth-of-type(2) {
    cursor:context-menu;
}
#header.hover{
    position: fixed;
    background: linear-gradient(180deg, #fff, #fff 100%);
    box-shadow: 0 2px 12px rgb(0 0 0 / 5%);
}
#header.hover #nav-border{
    background:#f4a200;
}


#header .img {
  width: 373px;
  height: 59px;
  margin-top: 10px;
  background: url('../images/logo.png') no-repeat;
  background-size: auto 100%;
  transition: 400ms ease all;
}

#header.hover .img {
  background: url('../images/logoHover.png') no-repeat;
  background-size: auto 100%;
}

#header nav {
  width: 850px;
}

#header nav > ul {
  width: 100%;
  line-height: 80px;
}

#header .nav_li {
  width:168px;
 text-align:center;
  cursor: pointer;
  position: relative;
  box-sizing:border-box;
  float: left;
}

#header .nav_li > a {
  color: #fff;
  font-size: 18px;
  font-weight: 500;
  transition: 400ms ease all;
}

#header.hover nav > ul > li > a {
  color: #666;
  font-weight: 400;
}

#header .nav_li:hover > a {
  font-weight: 600;
  color:#f4a200;
}

#header .nav_submenu {
  width: 600px;
  height: 300px;
  opacity:0;
  background: #ffffff;
  box-shadow: 0px 5px 9px 0px rgba(0, 0, 0, 0.1);
  padding: 15px 0;
  box-sizing:border-box;
  position: absolute;
  top: 130px;
  display: flex;
  overflow: hidden;
  justify-content: space-around;
  transition: 400ms ease all;
  visibility:hidden;
    left: 50%;
    margin-left: -286px;
    text-align: left;
    left: 50%;
    margin-left: -286px;
}

#header .nav_submenu > .platform p {
  width: 120px;
  line-height: 56px;
  font-size: 16px;
  color: #3d4040;
  font-weight: 600;
  box-sizing: border-box;
  transition: 400ms ease all;
}

#header .nav_submenu > .platform > ul li {
  font-size: 12px;
  line-height: 45px;
  color: #666;
  transition: 400ms ease all;
}

#header .nav_submenu > .platform > ul li a {
  color:#666;
}

#header .nav_submenu > .platform > ul li:hover a {
  color:#f4a200;
}
#header .nav_submenu > .platform:hover p{
    border-bottom: 1px solid #f4a200!important;
}

#header .nav_li:hover .nav_submenu {
  opacity:1;
  visibility:visible;
  top: 85px;
  text-align:left;
  left: 50%;
  margin-left: -286px;
}


#header .nav_li:hover .nav_submenu > .platform p {
  border-bottom: 1px solid #D8D8D8;
  height: 56px;
}

#header .nav_li .phone {
  width: 20px;
  height: 20px;
  margin-top: 18px;
  background:url('../images/phone.png') no-repeat;
  background-size: 100% 100%;
  float:left;
  margin-top:30px;
  margin-left:40px;
}
#header .nav_li .phoneTitle{
    color:#fff;
    width: 59px;
    height: 28px;
    float:left;
    margin-left:8px;
    font-size: 20px;
    line-height: 28px;
    margin-top:25px;
}
#header.hover  .nav_li .phone {
  background:url('../images/phoneHover.png') no-repeat;
}
#header.hover  .nav_li .phoneTitle {
    color:#666;
}