.about-wrap{
    width: 100%;
    margin: 40px auto;
    position: relative;
}
.about-wrap .about-bg{
    width: 100%;
    height: 660px;
    background: #1562C5;
    position: absolute;
    bottom: 0;
    z-index: -1;
}
.about{
    width: 1200px;
    margin: 0 auto;
}
.about .about-title{
    font-weight: bold;
    font-size: 30px;
    color: #1A1A1A;
    line-height: 33px;
    margin-top: 40px;
}
.about .about-desc{
    font-size: 14px;
    color: #666666;
    line-height: 21px;
    margin-top: 20px;
}
.about .about-video-wrap{
    width: 100%;
    aspect-ratio: 1200 / 535;
    position: relative;
    overflow: hidden;
    margin-top: 40px;
}
.about .about-video-wrap .about-img{
    width: 100%;
    height: 100%;
}
.about .about-video-wrap .about-img img{
    width: 100%;
    height: 100%;
}
.about .about-video-wrap .about-img .about-img-icon{
    position: absolute;
    top: 50%;
    left: 50%;
    width: 80px;
    height: 80px;
    transform: translate(-50%,-50%);
    cursor: pointer;
    z-index: 1;
}
.about .about-video-wrap .about-video{
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 2;
    background-color: #E6E6E6;
    display: none;
}
.about .about-video-wrap .about-video video{
    width: 100%;
    height: 100%;
}

.about .about-left,
.about .about-right{
    padding: 80px 0;
    width: 50%;
    float: left;
    color: #FFFFFF;
}
.about .about-left .choose-title{
    font-size: 16px;
    line-height: 17px;
}
.about .about-left .choose-desc{
    font-weight: bold;
    font-size: 40px;
    line-height: 60px;
    margin-top: 40px;
}
.about .about-left .about-more{
    width: 108px;
    height: 40px;
    background: #FFFFFF;
    border-radius: 20px;
    font-size: 14px;
    color: #1562C5;
    text-align: center;
    line-height: 40px;
    margin-top: 40px;
}
.about .about-left .about-more a{
    color: #1562C5;
    display: block;
}
.about .about-right{
    padding-left: 40px;
    border-left: 1px solid rgba(255, 255, 255, 0.4);
}
.about .about-right .about-item{
    margin-top: 30px;
    display: flex;
}
.about .about-right .about-item:first-child{
    margin-top: 0;
}
.about .about-right .about-item .about-item-icon{
    width: 20px;
    height: 20px;
    margin-right: 20px;
    margin-top: 1px;
    object-fit: cover;
}
.about .about-right .about-item .about-item-title{
    font-weight: bold;
    font-size: 20px;
    line-height: 22px;
    margin-bottom: 10px;
}
.about .about-right .about-item .about-item-desc{
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 21px;
}



@media screen and (min-width: 1000px) and (max-width: 1440px) {
    .about-wrap{
        margin: 30px auto;
    }
    .about-wrap .about-bg{
        height: 600px;
    }
    .about{
        width: 900px;
    }
    .about .about-left, .about .about-right{
        padding: 60px 0;
    }
    .about .about-left .choose-desc{
        font-size: 30px;
        line-height: 45px;
    }
    .about .about-right{
        padding-left: 30px;
    }
    .about .about-right .about-item{
        margin-top: 20px;
    }
    .about .about-video-wrap{
        margin-top: 30px;
    }
    .about .about-video-wrap .about-img .about-img-icon{
        width: 60px;
        height: 60px;
    }
    .about .about-title{
        font-size: 24px;
        line-height: 27px;
        margin-top: 30px;
    }
}

@media only screen and (max-width: 1000px) {
    .about-wrap{
        margin: 20px auto;
    }
    .about-wrap .about-bg{
        height: 460px;
    }
    .about{
        width: 700px;
    }
    .about .about-left, .about .about-right{
        padding: 40px 0;
    }
    .about .about-left .choose-desc{
        font-size: 24px;
        line-height: 36px;
        margin-top: 30px;
    }
    .about .about-left .about-more{
        margin-top: 30px;
    }
    .about .about-right{
        padding-left: 20px;
    }
    .about .about-right .about-item{
        margin-top: 10px;
    }
    .about .about-right .about-item .about-item-icon{
        margin-right: 10px;
    }
    .about .about-right .about-item .about-item-title{
        font-size: 18px;
        line-height: 20px;
        margin-bottom: 5px;
    }
    .about .about-right .about-item .about-item-desc{
        font-size: 12px;
        line-height: 18px;
    }
    .about .about-video-wrap{
        margin-top: 20px;
    }
    .about .about-video-wrap .about-img .about-img-icon{
        width: 50px;
        height: 50px;
    }
    .about .about-title{
        font-size: 20px;
        line-height: 22px;
        margin-top: 20px;
    }
    .about .about-desc{
        font-size: 12px;
        line-height: 18px;
        margin-top: 10px;
    }
}

.cert{
    margin: 80px auto;
}
.cert .cert-content{
    margin-top: 40px;
    display: flex;
    flex-wrap: wrap;
}
.cert .cert-content .cert-item{
    width: 24%;
    aspect-ratio: 278 / 392;
    margin-top: 30px;
    margin-right: 1.33%;
    overflow: hidden;
}
.cert .cert-content .cert-item:nth-child(-n+4){
    margin-top: 0;
}
.cert .cert-content .cert-item:nth-child(4n){
    margin-right: 0;
}
.cert .cert-content .cert-item img{
    width: 100%;
    height: 100%;
    transition: all 0.3s;
}
.cert .cert-content .cert-item:hover img{
    transform: scale(1.05);
}



@media only screen and (min-width: 1000px) and (max-width: 1440px) {
    .cert{
        margin: 60px auto;
    }
}
@media only screen and (max-width: 1000px) {
    .cert{
        margin: 40px auto;
    }
    .cert .cert-content{
        margin-top: 30px;
    }
    .cert .cert-content .cert-item{
        margin-top: 20px;
    }
}

.partner{
    margin: 80px auto;
}
.partner .partner-content{
    margin-top: 40px;
    display: flex;
    flex-wrap: wrap;
}
.partner .partner-content .partner-item{
    width: 24%;
    padding: 30px 20px;
    border: 1px solid #BCBCBC;
    cursor: pointer;
    margin-top: 30px;
    margin-right: 1.33%;
}
.partner .partner-content .partner-item:nth-child(-n+4){
    margin-top: 0;
}
.partner .partner-content .partner-item:nth-child(4n){
    margin-right: 0;
}
.partner .partner-content .partner-item .partner-img{
    width: 65%;
    aspect-ratio: 2 / 1;
    overflow: hidden;
    margin: 0 auto;
}
.partner .partner-content .partner-item img{
    width: 100%;
    height: 100%;
    transition: all 0.5s;
}
.partner .partner-content .partner-item:hover img{
    transform: scale(1.1);
}
.partner .partner-content .partner-item .partner-title{
    font-weight: bold;
    font-size: 18px;
    color: #1A1A1A;
    line-height: 27px;
    margin: 16px 0;
    text-align: center;
}
.partner .partner-content .partner-item .partner-desc{
    font-size: 14px;
    color: #666666;
    line-height: 21px;
}


@media only screen and (min-width: 1000px) and (max-width: 1440px) {
    .partner{
        margin: 60px auto;
    }
    .partner .partner-content .partner-item{
        width: 32%;
        margin-right: 2%;
    }
    .partner .partner-content .partner-item:nth-child(-n+4){
        margin-top: 30px;
    }
    .partner .partner-content .partner-item:nth-child(-n+3){
        margin-top: 0;
    }
    .partner .partner-content .partner-item:nth-child(4n){
        margin-right: 2%;
    }
    .partner .partner-content .partner-item:nth-child(3n){
        margin-right: 0;
    }
}
@media only screen and (max-width: 1000px) {
    .partner{
        margin: 40px auto;
    }
    .partner .partner-content{
        margin-top: 30px;
    }
    .partner .partner-content .partner-item{
        width: 32%;
        margin-right: 2%;
        margin-top: 20px;
        padding: 20px 10px;
    }
    .partner .partner-content .partner-item:nth-child(-n+4){
        margin-top: 20px;
    }
    .partner .partner-content .partner-item:nth-child(-n+3){
        margin-top: 0;
    }
    .partner .partner-content .partner-item:nth-child(4n){
        margin-right: 2%;
    }
    .partner .partner-content .partner-item:nth-child(3n){
        margin-right: 0;
    }
    .partner .partner-content .partner-item .partner-title{
        margin: 10px 0;
        font-size: 14px;
    }
    .partner .partner-content .partner-item .partner-desc{
        font-size: 12px;
        line-height: 18px;
    }
    .partner .partner-content .partner-item .partner-img{
        width: 80%;
    }
}