body{
    margin-top: 0;
}
/*
 * index nav styles
 **/
.header{
    background-color: transparent;
    box-shadow: none;
}
.header .header-logo img.normal{
    display: inline-block;
}
.header .header-logo img.active{
    display: none;
}
.header .header-nav .nav-item>a{
    color: #FFFFFF;
}
.header.active{
    background-color: #FFFFFF;
    box-shadow: 0px 2px 10px 0px rgba(0,0,0,0.16);
}
.header.active .header-logo img.normal{
    display: none;
}
.header.active .header-logo img.active{
    display: inline-block;
}
.header.active .header-nav .nav-item>a{
    color: #1A1A1A;
}
.header .header-nav .nav-item:hover>a{
    color: #15499A;
}

/**
 * banner styles
 **/
.swiper-horizontal>.swiper-pagination-bullets .swiper-pagination-bullet,
.swiper-pagination-horizontal.swiper-pagination-bullets .swiper-pagination-bullet{
    width: 60px;
    height: 4px;
    background-color: #FFFFFF;
    border-radius: 0;
    margin: 0;
}

.swiper-slide{
    position: relative;
}
.swiper-slide .swiper-slide-bg{
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
    background: linear-gradient( 90deg, rgba(0,0,0,0.5) 0%, rgba(0,0,0,0) 100%);
}
.swiper-slide-text{
    width: 1200px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #FFFFFF;
    z-index: 2;
    font-size: 16px;
    line-height: 24px;
}
.swiper-slide-text .swiper-slide-text-description{
    font-weight: bold;
    font-size: 46px;
    line-height: 49px;
    margin: 30px 0;
}
.swiper-slide-text .swiper-slide-text-more{
    width: 160px;
    height: 40px;
    background: #15499A;
    font-size: 14px;
    color: #FFFFFF;
    text-align: center;
    line-height: 40px;
    cursor: pointer;
    margin-top: 50px;
}
.swiper-slide-text .swiper-slide-text-more a{
    color: #FFFFFF;
    display: block;
}

@media only screen and (min-width: 1000px) and (max-width: 1440px) {
    .swiper-slide-text{
        width: 900px;
    }
    .swiper-slide-text .swiper-slide-text-description{
        font-size: 36px;
        line-height: 40px;
        margin: 20px 0;
    }
    .swiper-slide-text .swiper-slide-text-more{
        margin-top: 30px;
    }
}
@media only screen and (max-width: 1000px) {
    .swiper-slide-text{
        width: 700px;
        font-size: 14px;
        line-height: 20px;
    }
    .swiper-slide-text .swiper-slide-text-description{
        font-size: 26px;
        line-height: 30px;
        margin: 15px 0;
    }
    .swiper-slide-text .swiper-slide-text-more{
        width: 140px;
        height: 36px;
        font-size: 12px;
        line-height: 36px;
        margin-top: 20px;
    }
}


.service{
    width: 1200px;
    margin: -70px auto -117px;
    display: flex;
    justify-content: space-between;
    z-index: 3;
    position: relative;
}
.service .service-item{
    width: 32%;
    height: 187px;
    background: #FFFFFF;
}
.service .service-item .service-item-icon{
    width: 60px;
    height: 60px;
    margin: 40px auto 20px;
}
.service .service-item .service-item-icon img{
    width: 100%;
    height: 100%;
}
.service .service-item .service-item-title{
    font-weight: bold;
    font-size: 24px;
    color: #1A1A1A;
    line-height: 27px;
    text-align: center;
}

@media only screen and (min-width: 1000px) and (max-width: 1440px) {
    .service{
        width: 900px;
        margin: -60px auto -90px;
    }
    .service .service-item{
        height: 150px;
    }
    .service .service-item .service-item-icon{
        width: 50px;
        height: 50px;
        margin: 30px auto 20px;
    }
    .service .service-item .service-item-title{
        font-size: 20px;
        line-height: 20px;
    }
}
@media only screen and (max-width: 1000px) {
    .service{
        width: 700px;
        margin: -50px auto -70px;
    }
    .service .service-item{
        height: 120px;
    }
    .service .service-item .service-item-icon{
        width: 40px;
        height: 40px;
        margin: 20px auto 10px;
    }
    .service .service-item .service-item-title{
        font-size: 18px;
        line-height: 20px;
    }
}


.about-wrap{
    width: 100%;
    padding-top: 177px;
    background: #F8F8FA;
}
.about{
    width: 1200px;
    margin: 0 auto;
}
.about .about-content .about-video{
    width: 42%;
    float: left;
}
.about .about-content .about-video video{
    width: 100%;
}
.about .about-content .about-text{
    width: 53%;
    float: right;
}
.about .about-content .about-text .about-title{
    font-weight: bold;
    font-size: 36px;
    color: #1A1A1A;
    line-height: 40px;
}
.about .about-content .about-text .about-description{
    font-size: 16px;
    color: #666666;
    line-height: 24px;
    margin: 40px 0 60px;
}
.about .about-content .about-text .about-more{
    display: flex;
}
.about .about-content .about-text .about-more a{
    width: 160px;
    height: 40px;
    background: #15499A;
    font-size: 14px;
    color: #FFFFFF;
    text-align: center;
    line-height: 40px;
    margin-right: 10px;
    display: block;
}
.about .about-content .about-text .about-more a:last-child{
    background: #FFFFFF;
    border: 1px solid #15499A;
    color: #15499A;
}
.about .about-engineering{
    display: flex;
    justify-content: space-around;
}
.about .about-engineering .about-engineering-item{
    width: 24.6%;
    height: 160px;
    background: #FFFFFF;
    cursor: pointer;
}
.about .about-engineering .about-engineering-item .about-engineering-item-num{
    font-family: DIN, DIN;
    font-weight: bold;
    font-size: 56px;
    color: #15499A;
    line-height: 69px;
    text-align: center;
    margin-top: 30px;
}
.about .about-engineering .about-engineering-item .about-engineering-item-title{
    font-size: 16px;
    color: #262626;
    line-height: 17px;
    text-align: center;
    margin-top: 14px;
}

@media only screen and (min-width: 1000px) and (max-width: 1440px) {
    .about-wrap{
        padding-top: 150px;
    }
    .about{
        width: 900px;
    }
    .about .about-content .about-text .about-title{
        font-size: 30px;
        line-height: 30px;
    }
    .about .about-content .about-text .about-description{
        margin: 20px 0;
        font-size: 14px;
        line-height: 20px;
    }
    .about .about-engineering .about-engineering-item{
        height: 120px;
    }
    .about .about-engineering .about-engineering-item .about-engineering-item-num{
        font-size: 40px;
        line-height: 40px;
    }
}
@media only screen and (max-width: 1000px) {
    .about-wrap{
        padding-top: 120px;
    }
    .about{
        width: 700px;
    }
    .about .about-content .about-text .about-title{
        font-size: 24px;
        line-height: 24px;
    }
    .about .about-content .about-text .about-description{
        margin: 15px 0;
        font-size: 12px;
        line-height: 16px;
    }
    .about .about-content .about-text .about-more a{
        width: 120px;
        height: 30px;
        font-size: 12px;
        line-height: 30px;
    }
    .about .about-engineering .about-engineering-item{
        height: 90px;
    }
    .about .about-engineering .about-engineering-item .about-engineering-item-num{
        font-size: 30px;
        line-height: 30px;
        margin-top: 15px;
    }
    .about .about-engineering .about-engineering-item .about-engineering-item-title{
        font-size: 14px;
        line-height: 18px;
        margin-top: 10px;
    }
}



/*
 * HOT PRODUCTS STYLES
 **/
.hot-products{
    width: 1200px;
    margin: 60px auto;
}
.title{
    font-weight: bold;
    font-size: 36px;
    color: #1A1A1A;
    line-height: 41px;
    text-align: center;
}
.description{
    font-size: 12px;
    color: #666666;
    line-height: 18px;
    text-align: center;
    margin-top: 20px;
}
/* HOT PRODUCTS SLIDE */
.products-category{
    margin-top: 30px;
    display: flex;
    flex-wrap: wrap;
}
.products-category .category-item {
    width: 19%;
    height: 40px;
    background: #FFFFFF;
    border: 1px solid #ECECEC;
    font-size: 14px;
    color: #1A1A1A;
    line-height: 40px;
    text-align: center;
    margin-right: 1.25%;
    margin-top: 18px;
    cursor: pointer;
}
.products-category .category-item:nth-child(5n){
    margin-right: 0;
}
.products-category .category-item:nth-child(-n+5){
    margin-top: 0;
}
.products-category .category-item.active{
    background: #15499A;
    color: #FFFFFF;
}


.products .products-list{
    width: 100%;
    display: none;
    justify-content: space-between;
    margin-top: 30px;
}
.products .products-list.active{
    display: flex;
}
.products .products-list .product-item{
    width: 32%;
    margin-right: 2%;
    margin-bottom: 20px;
    background-color: #FFFFFF;
    cursor: pointer;
}
.products .products-list .product-item:last-child{
    margin-right: 0;
}
.products .products-list .product-item .product-item-video{
    width: calc(100% - 40px);
    aspect-ratio: 1 / 1; /* 1:1 的宽高比，即高度等于宽度 */
    position: relative;
    margin-left: 20px;
}
.products .products-list .product-item .product-item-video img{
    width: 100%;
    height: 100%;
}
.products .products-list .product-item .product-item-video .product-item-video-icon{
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    background-color: rgba(0,0,0,.4);
    display: none;
}
.products .products-list .product-item .product-item-video .product-item-video-icon img{
    width: 50px;
    height: 50px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
.products .products-list .product-item .product-item-info{
    width: 100%;
    margin-top: -170px;
    background: #F8F8FA;
    padding: 190px 20px 20px;
}
.products .products-list .product-item .product-item-info .product-item-title{
    font-weight: bold;
    font-size: 18px;
    color: #1A1A1A;
    line-height: 27px;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}
.products .products-list .product-item .product-item-info .product-item-info-attribute{
    margin-top: 16px;
    display: grid;
    grid-template-columns: 112px 1fr;
}
.products .products-list .product-item .product-item-info .product-item-info-attribute .product-item-info-attribute-title{
    font-size: 14px;
    line-height: 16px;
    color: #666666;
}
.products .products-list .product-item .product-item-info .product-item-info-attribute .product-item-info-attribute-value{
    font-weight: bold;
    font-size: 14px;
    line-height: 16px;
    color: #1A1A1A;
    word-break: break-all;
}
.products .products-list .product-item .product-item-info .product-item-more{
    width: 100%;
    height: 40px;
    background: #00367D;
    font-size: 14px;
    color: #FFFFFF;
    line-height: 40px;
    text-align: center;
    margin-top: 30px;
}
.products .products-list .product-item .product-item-info .product-item-more a{
    color: #FFFFFF;
    display: block;
}
.products .products-list .product-item:hover .product-item-video-icon{
    display: block;
}
.products .products-list .product-item:hover .product-item-info{
    background: #15499A;
}
.products .products-list .product-item:hover .product-item-info .product-item-title,
.products .products-list .product-item:hover .product-item-info .product-item-info-attribute .product-item-info-attribute-title,
.products .products-list .product-item:hover .product-item-info .product-item-info-attribute .product-item-info-attribute-value{
    color: #FFFFFF;
}
.products .products-list .product-item:hover .product-item-info .product-item-more{
    background: #FFFFFF;
    color: #15499A;
}
.products .products-list .product-item:hover .product-item-info .product-item-more a{
    color: #15499A;
}


@media screen and (min-width: 1000px) and (max-width: 1440px) {
    .hot-products{
        width: 900px;
        margin: 50px auto;
    }
    .title{
        font-size: 30px;
        line-height: 36px;
    }
    .description{
        margin-top: 15px;
    }
    .products-category{
        margin-top: 20px;
    }
    .products-category .category-item{
        width: 19.5%;
        font-size: 12px;
        margin-right: 0.625%;
        margin-top: 12px;
    }
    .products .products-list .product-item .product-item-video{
        width: calc(100% - 30px);
        margin-left: 15px;
    }
    .products .products-list .product-item .product-item-video .product-item-video-icon img{
        width: 40px;
        height: 40px;
    }
    .products .products-list .product-item .product-item-info{
        margin-top: -130px;
        padding: 150px 15px 15px;
    }
    .products .products-list .product-item .product-item-info .product-item-title{
        font-size: 16px;
        line-height: 24px;
    }
    .products .products-list .product-item .product-item-info .product-item-info-attribute{
        margin-top: 10px;
        grid-template-columns: 90px 1fr;
    }
    .products .products-list .product-item .product-item-info .product-item-info-attribute .product-item-info-attribute-title{
        font-size: 12px;
        line-height: 14px;
    }
    .products .products-list .product-item .product-item-info .product-item-more{
        margin-top: 20px;
    }
}

@media only screen and (max-width: 1000px) {
    .hot-products{
        width: 700px;
        margin: 40px auto;
    }
    .title{
        font-size: 24px;
        line-height: 30px;
    }
    .description{
        margin-top: 10px;
    }
    .products-category{
        margin-top: 10px;
    }
    .products-category .category-item{
        width: 24%;
        font-size: 12px;
        margin-right: 1.33%;
        margin-top: 10px;
        height: 30px;
        line-height: 30px;
    }
    .products-category .category-item:nth-child(5n){
        margin-right: 1.33%;
    }
    .products-category .category-item:nth-child(-n+5){
        margin-top: 10px;
    }
    .products-category .category-item:nth-child(4n){
        margin-right: 0;
    }
    .products-category .category-item:nth-child(-n+4){
        margin-top: 0;
    }

    .products .products-list .product-item .product-item-video{
        width: calc(100% - 20px);
        margin-left: 10px;
    }
    .products .products-list .product-item .product-item-video .product-item-video-icon img{
        width: 30px;
        height: 30px;
    }
    .products .products-list .product-item .product-item-info{
        margin-top: -110px;
        padding: 120px 10px 10px;
    }
    .products .products-list .product-item .product-item-info .product-item-title{
        font-size: 14px;
        line-height: 20px;
    }
    .products .products-list .product-item .product-item-info .product-item-info-attribute{
        margin-top: 5px;
        grid-template-columns: 82px 1fr;
    }
    .products .products-list .product-item .product-item-info .product-item-info-attribute .product-item-info-attribute-title{
        font-size: 12px;
        line-height: 14px;
    }
    .products .products-list .product-item .product-item-info .product-item-more{
        margin-top: 10px;
        height: 30px;
        line-height: 30px;
        font-size: 12px;
    }
}



.clients-wrap{
    width: 100%;
    background: #F8F8FA;
}
.clients{
    width: 1200px;
    margin: 0 auto;
    padding: 60px 0;
    background: url("../images/index-client-bg.webp") no-repeat center bottom;");
}
.clients .clients-list{
    margin-top: 40px;
    display: flex;
    flex-wrap: wrap;
}
.clients .clients-list .client-item{
    width: 20%;
}
.clients .clients-list .client-item img{
    width: 100%;
}



@media screen and (min-width: 1000px) and (max-width: 1440px) {
    .clients{
        width: 900px;
        padding: 50px 0;
    }
    .clients .clients-list{
        margin-top: 30px;
    }
}

@media only screen and (max-width: 1000px) {
    .clients{
        width: 700px;
        padding: 40px 0;
    }
    .clients .clients-list{
        margin-top: 20px;
    }
}


.news{
    width: 1200px;
    margin: 60px auto;
}
.news .news-category{
    margin-top: 30px;
    display: flex;
    justify-content: center;
}
.news .news-category .category-item{
    width: 224px;
    height: 40px;
    background: #FFFFFF;
    border: 1px solid #ECECEC;
    font-size: 14px;
    color: #1A1A1A;
    line-height: 40px;
    text-align: center;
    cursor: pointer;
    margin-right: 20px;
}
.news .news-category .category-item:last-child{
    margin-right: 0;
}
.news .news-category .category-item.active{
    background: #15499A;
    color: #FFFFFF;
}
.news .news-list{

}
.news .news-list .news-list-ul{
    display: none;
    flex-wrap: wrap;
    justify-content: space-between;
}
.news .news-list .news-list-ul.active{
    display: flex;
}
.news .news-list .news-item{
    width: 49%;
    margin-top: 30px;
}
.news .news-list .news-item .news-item-video{
    width: 100%;
    aspect-ratio: 465 / 330;
    position: relative;
}
.news .news-list .news-item .news-item-video img{
    width: 100%;
    height: 100%;
}
.news .news-list .news-item .news-item-video .news-item-video-icon{
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    background-color: rgba(0,0,0,.4);
    display: none;
}
.news .news-list .news-item .news-item-video .news-item-video-icon img{
    width: 50px;
    height: 50px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
.news .news-list .news-item .news-item-title{
    font-weight: bold;
    font-size: 18px;
    color: #1A1A1A;
    line-height: 27px;
    margin: 15px 0;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}
.news .news-list .news-item .news-item-desc{
    font-size: 12px;
    color: #666666;
    line-height: 18px;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}
.news .news-list .news-item:hover .news-item-video .news-item-video-icon{
    display: block;
}


@media screen and (min-width: 1000px) and (max-width: 1440px) {
    .news{
        width: 900px;
        margin: 50px auto;
    }
    .news .news-category{
        margin-top: 20px;
    }
    .news .news-list .news-item{
        margin-top: 20px;
    }
    .news .news-list .news-item .news-item-video .news-item-video-icon img{
        width: 40px;
        height: 40px;
    }
    .news .news-list .news-item .news-item-title{
        font-size: 16px;
        line-height: 24px;
        margin: 10px 0;
    }
}

@media only screen and (max-width: 1000px) {
    .news{
        width: 700px;
        margin: 40px auto;
    }
    .news .news-category{
        margin-top: 10px;
    }
    .news .news-category .category-item{
        width: 160px;
        height: 30px;
        font-size: 14px;
        line-height: 30px;
    }
    .news .news-list .news-item{
        margin-top: 10px;
    }
    .news .news-list .news-item .news-item-video .news-item-video-icon img{
        width: 30px;
        height: 30px;
    }
    .news .news-list .news-item .news-item-title{
        font-size: 14px;
        line-height: 20px;
        margin: 5px 0;
    }
}