body {
    font-size: 16px;
    overflow-x: hidden; 
}
ul, li {
    margin: 0; padding: 0;list-style: none;
}
a, a:hover, a:active{
    text-decoration: none;
}
.header {
    height: 100vh;
}
.bgImg {
    width: 100vw;
    height: 100vh;
    position: absolute;
    top: 0;
    left: 0;
    z-index: -1;
    overflow: hidden;
}
.bgImg img {
    display: block;
    width: 100%;
}
.bgImg .logo img {
    display: block;
    width: 100%;
}
/* .activeLink {
    position: relative;
}
.activeLink:after {
    content: "";
    position: absolute;
    bottom: -1.2vw;
    left: 0;
    width: 100%;
    border-bottom: 3px solid #fff;
} */
.navMenu {
    display: flex;
    justify-content: space-between;
    padding: 1.5vh 3.85vh 1vw 2.81vh;
    position: fixed;
    top: 0;
    width: 100vw;
    z-index: 1050;
}
.navMenu .logo {
    width: 114px;
    height: 27px;
    background-image: url(../images/logo.png);
    background-size: 100% 100%;
}
.navMenu.wrap_fix .logo {
    background-image: url(../images/logoblack.png);
}
.wrap_fix {
    background-color: #fff;
    box-shadow: 0 1px 2px #ccc;
    transition-duration: 0.25s;
}
.navMenu .title {
    padding-top: .3vw;
}
.navMenu .title a {
    color: #fff;
}
.navMenu .title a.activeLink {
    font-weight: bold;
    font-size: 18px;
}
.navMenu.wrap_fix .title a,
.navMenu.wrap_fix .aboutUs a  {
    color: #304663;
}
.navMenu.wrap_fix .aboutUs a:last-child {
    border-color: #304663;
}
.navMenu .title a:not(:last-child) {
    margin-right: 2.1vw;
}
.navMenu .aboutUs a {
    color: #fff;
    display: inline-block;
    width: 50px;
    height: 30px;
    line-height: 30px;
    font-size: 14px;
    font-weight: bold;
    text-align: center;
}
.navMenu .aboutUs a:last-child {
    border: solid 1px #fff;
    border-radius: 4px;
}

.tabChange {
    display: flex;
    justify-content: space-between;
}
.tabChange .tab {
    width: 25%;
    height: 11vw;
    overflow: hidden;
}
.tabChange .tab .bg {
    width: 100%;
    height: 100%;
    display: flex;
    align-items:center;/*垂直居中*/
    justify-content: center;/*水平居中*/
    background-size: 100% 100%;
    font-size: 1.875vw;
}
.tabChange .tab .bg span {
    color: #fff;
    position: relative;
    z-index: 10000;
}

.headLine {
    color:#fff;
    font-size: 6vw;
    text-align: center;
    padding-top: 8vw;
}
.headLine span {
    font-size: 4vw;
}
.headLine .circle {
    width: 1vw;
    height: 1vw;
    background-color: #fff;
    border-radius: 50%;
    margin: 0.5vw auto 2vw 50.1%;
}
.headLine .desc {
    margin-top: 1vw;
    font-size: 3vw;
    color: #fff;
    /* font-weight: bold; */
    text-align: center;
}
.headLine .experience {
    font-size: 1.25vw;
    border-radius: 2px;	
    background-color: #0079FF;
    margin-top: 3vw;
    display: inline-block;
    padding: 1.25vw 10.625vw;
    color: #fff;
}


.footer {
    /* height: 30vw; */
    color: #fff;
    font-size: 1vw;
    background-color: #303847;
    position: relative;
}
.footer .contactUs {
    position: absolute;
    bottom: 100%;
    left: 0;
    transform: translateY(50%);
    background-color: #0079FF;
    text-align: center;
    font-size: 2.6vw;
    padding: 3vw 10vw;
    height: 16.04vw;
    border-radius: 0 10px 10px 0;
}
.footer .contactUs img {
    width: 2.5vw;
    margin-top: 2vw;
}
.footer .contactUs img:last-child {
    margin-left: 3.33vw;
}
.footer .joinUs {
    display: inline-block;
    margin: 1.3vw 0 1vw 33vw;
}
.footer .joinUs span {
    font-size: 24px;
}
.footer .joinUs a {
    display: block;
    color: #303847;
    background-color: #fff;
    padding: 1vw 8.125vw;
    margin-top: 1vw;
    border-radius: 5px;
}
.footer .info .above {
    display: flex;
    justify-content: space-between;
    margin: 5.21vw 5.78vw 2.5vw;
    padding-bottom: 1.8vw;
    border-bottom: 1px solid rgba(255,255,255, .2);
}
.footer .info .tel span {
    opacity: 0.5;
}
.footer .info .tel span:not(:first-child) {
    margin-left: 2vw;
}
.footer .info .link a{
    color: #fff;
}
.footer .info .link a:not(:first-child){
    margin-left: 2vw;
}
.footer .info .address {
    display: flex;
    justify-content: space-between;
    margin: 0 5.78vw;
    padding-bottom: 2vw;
}
.footer .info .address a {
    color: #fff;
}
.footer .security {
    color: #fff;
    text-align: center;
    display: block;
    padding-bottom: 5vw;
    padding-top: 2vw;
}

/* 动画 start */
ul.tabChange {
    position: relative;
}
.tabChange>li.tab {
    position: relative;
    transition: 0.2s all linear;
    cursor: pointer;
}
.tabChange>li.tab::before {
    content: "";
    position: absolute;
    top: 0;
    left: 50%;
    width: 0;
    height: 100%;
    border-bottom: 5px solid #0079FF;
    transition: 0.2s all linear;
}
.tabChange>li.tab:hover::before {
    width: 100%;
    top: 0;
    left: 0;
    transition-delay: 0.1s;
    border-bottom-color: #0079FF;
}
.tabChange>li.tab:last-child:before {
    left: 100%;
}
.tabChange>li.tab:last-child:hover:before {
    left: 0;
}
.tabChange>li.tab:first-child:before {
    left: 0;
}
.tabChange>li.tab:hover .tabChange>li.tab:before {
    left: 100%;
}
.tabChange>li.tab:hover .tabChange>li.tab:hover:before {
    left: 0;
}
.tabChange>li.tab:hover+.tabChange>li.tab::before {
    left: 0;
}
/* 动画 end */