.banner{
    width: 100%;
    height: 620px;
    background: no-repeat center top;
    background-size: cover;
    position: relative;
}
.cont{
    width: 1220px;
    margin: auto;
    display: flex;
    position: absolute;
    left: 0;
    right: 0;
    top: 165px;
}
.cont section{
    width: 543px;
    margin-top: 8px;
}
.cont p{
    font-size: 16px;
    font-family: sourcehansanscn-regular, sourcehansanscn;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.8);
    line-height: 36px;
    margin-top: 25px;
    word-break: break-all;
    text-overflow: ellipsis;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 6;
    -webkit-box-orient: vertical;
}
.cont h2{
    font-size: 51px;
    font-family: sourcehansanscn-light, sourcehansanscn;
    font-weight: 300;
    color: #ffffff;
    margin: 0;
    padding: 0;
}
.cont img{
    width: 258px;
    height: 254px;
    margin-left: 232px;
}
.tab-nav{
    width: 100%;
    height: 64px;
    background: rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(6px);
    position: absolute;
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.tab-center{
    width: 1220px;
    height: 100%;
    display: flex;
}
.nav-center{
    width: 1220px;
    left: 0;
    right: 0;
    margin: auto;
    position: absolute;
    bottom: 94px;
    line-height: 24px;
    font-size: 16px;
    font-weight: 500;
    display: flex;
}
.nav-center span{
    margin: 0 10px;
    color: rgba(255, 255, 255, 0.5);
}
.nav-center a{
    text-decoration: none;
    color: rgba(255, 255, 255, 0.8);
}
.nav-center a:last-child{
    color: #fff;
}
.tab-center span{
    width: 220px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 20px;
    font-family: sourcehansanscn-regular, sourcehansanscn;
    font-weight: 400;
    border-top: 3px solid transparent;
    color: #ffffff;
    cursor: pointer;
}
.tab-center .active{
    background-color: #fff;
    color: #222222;
    border-color: #e60113;
}
.tab-contbox{
    width: 1220px;
    margin: 0 auto 100px;
}
.tab-contbox section{
    display: none;
}
.tab-contbox section:first-child{
    display: block;
}

.tab-contbox h3{
    font-size: 38px;
    font-family: sourcehansanscn-light, sourcehansanscn;
    font-weight: 300;
    color: #222222;
    line-height: 57px;
    margin: 60px auto 40px;
    text-align: center;
}
/* section1 */
.parameter{
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}
.parameter1 span{
    flex: 1;
    padding: 45px 0 39px;
    background: #f7faff;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    margin-left: 20px;
}
.parameter1 span:first-child{
    margin: 0;
}
.parameter1 h4{
    font-size: 18px;
    font-family: sourcehansanscn-medium, sourcehansanscn;
    font-weight: 500;
    color: #222222;
    line-height: 18px;
    padding: 0;
    margin: 0
}
.parameter1 .p1{
    font-size: 40px;
    font-family: sourcehansanscn-extralight, sourcehansanscn;
    font-weight: 200;
    color: #222222;
    line-height: 28px;
    margin: 25px 0;
}
.parameter1 .p2{
    font-size: 14px;
    font-family: sourcehansanscn-normal, sourcehansanscn;
    font-weight: 400;
    color: #666666;
    line-height: 21px;
    margin: 0;
}   
.parameter2 span{
    width: 600px;
    padding: 25px 25px 25px 30px;
    background: #f7faff;
    border-radius: 12px;
    margin-top: 20px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
}
.parameter2 h4{
    width: 150px;
    font-size: 18px;
    font-family: sourcehansanscn-medium, sourcehansanscn;
    font-weight: bold;
    color: #222222;
    line-height: 18px;
    margin: 5px 0;
}
.parameter2 p{
    max-width: 100%;
    font-size: 16px;
    font-family: sourcehansanscn-normal, sourcehansanscn;
    font-weight: 400;
    color: #222222;
    line-height: 28px;
    margin: 5px 0;
}
/* section2 */
.manual{
    width: 1220px;
    height: 186px;
    background: #f7faff;
    border-radius: 10px;
    padding: 43px 0 43px 30px;
    margin-bottom: 20px;
    position: relative;
}
.manual img{
    width: 100px;
    height: 100px;
    float: left;
}
.manual div{
    padding: 12px 0;
    margin-left: 34px;
    float: left;
    display: flex;
    flex-direction: column;
}
.manual div h4{
    font-size: 20px;
    font-family: sourcehansanscn-medium, sourcehansanscn;
    font-weight: 500;
    color: #222222;
    line-height: 30px;
    margin: 0 0 8px;
}
.manual div span{
    font-size: 14px;
    font-family: sourcehansanscn-normal, sourcehansanscn;
    font-weight: 400;
    color: #666666;
    line-height: 21px;
}
.manual a{
    text-decoration: none;
}
.manual .see{
    height: 52px;
    background: none;
    font-size: 18px;
    font-family: sourcehansanscn-medium, sourcehansanscn;
    font-weight: 500;
    color: #222222;
    position: absolute;
    right: 205px;
    top: 0;
    bottom: 0;
    margin: auto;
    display: flex;
    justify-content: center;
    align-items: center;
}
.manual .dow{
    width: 135px;
    height: 52px;
    background: #e60113;
    font-size: 18px;
    font-family: sourcehansanscn-medium, sourcehansanscn;
    font-weight: 500;
    color: #ffffff;
    position: absolute;
    right: 40px;
    top: 0;
    bottom: 0;
    margin: auto;
    display: flex;
    justify-content: center;
    align-items: center;
}
/* section3 */
.application{
    width: 1220px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}
.application div{
    width: 380px;
    text-align: center;
    margin-bottom: 60px;
}
.application div img{
    width: 380px;
    height: 285px;
    margin-bottom: 27px;
}
.application div span{
    font-size: 24px;
    font-family: sourcehansanscn-normal, sourcehansanscn;
    font-weight: 400;
    color: #222222;
    line-height: 36px;
}
/* section4 */
.programme{
    width: 1220px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}
.programme div{
    width: 600px;
    text-align: center;
    margin-bottom: 25px;
}
.programme div img{
    width: 600px;
    height: 338px;
    margin-bottom: 27px;
}
.programme div span{
    font-size: 20px;
    font-family: sourcehansanscn-normal, sourcehansanscn;
    font-weight: 400;
    color: #222222;
    line-height: 30px;
}