* {
    padding: 0;
    margin: 0;
}

body {
    background: #FFFFFF;
   min-width: 1900px;
}
.header {
    background: url("./image/banner.png") no-repeat center;
    background-size: 100% 100%;
    height: 100%;
    width: 100%;
}

.top {
    height: 518px;
    margin: 0 auto;
}

.top .img {
    width: 185px;
    height: 38px;
    margin: 0 auto;
    padding-top: 55px;
    padding-bottom: 50px;
    box-sizing: content-box;
}

.top .title {
    width: 946px;
    height: 78px;
    font-family: 'PingFang SC';
    font-weight: 500;
    font-size: 56px;
    color: #FFFFFF;
    line-height: 68px;
    letter-spacing: 3px;
    text-align: center;
    margin: 0 auto;
}

.top .secondLevel {
    width: 320px;
    height: 30px;
    font-family: 'OpenSans-Regular';
    font-size: 20px;
    color: #FFFFFF;
    line-height: 30px;
    text-align: center;
    margin: 35px auto 65px auto;
}

.top .login {
    margin: 0 auto;
    width: 226px;
    height: 56px;
}

.top .login button {
    width: 226px;
    height: 56px;
    border-radius: 50px;
    border: 1px solid #FFFFFF;
    font-size: 18px;
    background-color: #2d75dc;
    color: #FFFFFF;
    font-family: 'OpenSans-Bold';
}

.introduction {
    width: 170px;
    height: 50px;
    font-family: 'HKGrotesk-Bold';
    font-size: 36px;
    color: #183B56;
    line-height: 48px;
    letter-spacing: 5px;
    text-align: center;
    margin: 45px auto auto auto;
}

.middle p {
    width: 902px;
    height: 96px;
    font-family: 'OpenSans-Regular';
    font-size: 18px;
    color: #5A7184;
    text-align: center;
    margin: 24px auto auto;
    line-height: 32px;
}

.middle .middleBack {
    width: 632px;
    height: 247px;
    margin: 25px auto -25px auto;
    background: url('./image/Base.png') no-repeat;
}

.middleBack .box {
    flex: 1;
    text-align: center;
}

.middleBack-box {
    width: 400px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 247px;
}

.middleBack .box p {
    width: 64px;
    height: 28px;
    font-family: 'HKGrotesk-Bold';
    font-weight: normal;
    font-size: 20px;
    color: #183B56;
    line-height: 24px;
    text-align: center;
}

.advantage {
    width: 100%;
    background: url('./image/middle.png') no-repeat;
    padding-top: 130px;
    box-sizing: border-box;
}

.advantage-title {
    margin: 0 auto;
    /*width: 1440px;*/
}

.advantage-title p:first-child {
    width: 170px;
    height: 50px;
    font-family: 'HKGrotesk-Bold';
    font-weight: normal;
    font-size: 36px;
    color: #183B56;
    line-height: 50px;
    letter-spacing: 5px;
    text-align: center;
    margin: 0 auto;
}

.advantage-title p:nth-child(2) {
    width: 756px;
    height: 70px;
    font-family: 'OpenSans-Regular';
    font-size: 18px;
    color: #5A7184;
    line-height: 30px;
    text-align: center;
    margin: 20px auto 30px auto;
}

.advantage-box {
    margin: 0 auto;
    width: 950px;
    display: grid;
    grid-template-columns: 1fr 1fr;
}

.advantage-box .advantage-main {
    width: 466px;
    height: 266px;
    background: #FFFFFF;
    box-shadow: 0 8px 18px 1px rgba(0, 0, 0, 0.05);
    border-radius: 8px 8px 8px 8px;
    border: 1px solid #E5EAF4;
    margin: auto 20px 20px auto;
}

.advantage-main div {
    width: 88px;
    height: 88px;
    margin: 25px auto auto;
}

.advantage-main .title {
    width: 250px;
    height: 30px;
    font-family: 'HKGrotesk-Bold';
    font-size: 22px;
    color: #183B56;
    line-height: 30px;
    letter-spacing: 1px;
    text-align: center;
    margin: 10px auto;
}

.advantage-main .introduct {
    width: 340px;
    height: 60px;
    font-family: 'OpenSans-Regular';
    font-size: 18px;
    color: #5A7184;
    line-height: 30px;
    text-align: center;
    margin: 15px auto auto;
}

.introduce {
    width: 100%;
    height: 1050px;
    background: url('./image/introduction.png') no-repeat center;
    padding-top: 140px;
    box-sizing: border-box;
    background-size: 100% 100%;
}

.introduce .title {
    width: 350px;
    height: 50px;
    font-family: 'HKGrotesk-Bold';
    font-size: 36px;
    color: #FFFFFF;
    line-height: 50px;
    letter-spacing: 2px;
    text-align: center;
    margin: auto auto 24px auto;
}

.introduce .secondary {
    width: 692px;
    height: 70px;
    font-family: 'OpenSans-Regular';
    font-size: 18px;
    color: #FFFFFF;
    line-height: 32px;
    text-align: center;
    margin: 0 auto;
}

.introduce-Main {
    width: 1020px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
}

.ability {
    width: 320px;
    height: 560px;
    background: #FFFFFF;
    margin-right: 30px;
    flex: 1;
    position: relative;
}
.video{
    position: absolute;
    bottom: 0;
}
.video .switch{
    position: absolute;
    top: 50%;
    left: 50%;
    margin-top: -20px;
    margin-left: -20px;
    cursor: pointer;
    width: 50px;
    height: 50px;
}
.video .pic{
    width: 320px;
    height: 180px;
}
.ability:last-child {
    margin-right: 0px;
}

.ability-title {
    height: 34px;
    font-family: 'HKGrotesk-Bold';
    font-size: 24px;
    color: #183B56;
    line-height: 32px;
    letter-spacing: 3px;
    text-align: left;
    margin: 31px 0 31px 36px;
}

.online {
    width: 248px;
    height: 0px;
    border: 1px solid #E5EAF4;
    margin: 31px auto 31px auto;
}

.ability .topic p {
    margin-top: 15px;
}

.ability .topic p img {
    vertical-align: middle;
    margin: 0 12px 0 36px;
}

.ability .topic p span {
    font-family: 'OpenSans-Regular';
    font-size: 16px;
    color: #183B56;
}

.picter {
    width: 249px;
    margin: 0 auto -30px auto;
}

.footer {
    width: 100%;
    background: url(./image/foot.png) no-repeat center;
    height: 309px;
    background-size: 100% 100%;
    padding-top: 140px;
    box-sizing: border-box;
}
.footer-Main{
    width: 940px;
    margin: 0 auto;
}
.footer-Main .left{
    float: left;
}
.footer-Main .right{
    float: right;
    margin-top: -18px;
}
.footer-Main .left p:first-child{
    font-family: 'OpenSans-Regular';
    font-size: 16px;
    color: #FFFFFF;
}
.footer-Main .left p{
    color: #FFFFFF;
    margin-bottom: 10px;
    font-size: 14px;
    font-family: 'OpenSans-Regular';
}
.footer-Main .left p a{
    text-decoration: none;
    color: #FFFFFF;
}
.model{
    width: 80vw;
    height: 80vh;
    top: 3vw;
    left: 25vh;
    position: fixed;
    display: none;
}


#closeBasic,#closeBusiness,.picClose{
    position: absolute;
    right: 10px;
    width: 20px;
    height: 20px;
    top: 8px;
    cursor: pointer;
    z-index: 999;
}

#bigImg{
    margin-left: 2.5%;
    margin-top: 25px;
    width: 95%;
    height: 95%;
}
#back-curtain{
    background: #000;
}

li{
    list-style: none;
}
.lunbo{
    width: 100%;
}
.content{
    width: 800px;
    height: 300px;
    margin: 20px auto;
    position: relative;
}
#item{
    width: 100%;
    height: 100%;
}
.lunbo .item{
    position: absolute;
    opacity: 0;
    transition: all 1s;

}
.lunbo .item.active{
    opacity:1;
}
.lunbo img{
    width: 73vw;
    height: 75vh;
    margin-left: 4.7%;
    margin-top: 1.5%;
}
#btn-left{
    z-index: 10;/*始终显示在图片的上层*/
    position: absolute;
    left: 5px;
    top: 50%;
    cursor: pointer;
}

#btn-right{
    z-index: 10;
    position: absolute;
    right: 12px;
    top: 50%;
    cursor: pointer;
}
#btn-left img,#btn-right img{
    width: 50px;
    height: 50px;
}