#section1 {
    position: fixed;
    top: 0px
}

/* .section2,
.section3,
.section4,
.section5 {
    background-color: #fff;
} */

.section2 {
    /* z-index: 20; */
    z-index: 12;
    margin-top: 100vh;
    position: relative;
}

.section3 {
    z-index: 13;
}

.section4 {
    z-index: 14;
}

.section5 {
    z-index: 15;
}

.section4 {
    background-color: #fff;
}

/* .section4,
.section5 {
    background-color: #fff;
} */

.section5 {
    height: auto;
}

.banner .swiper-slide {
    width: 100%;
    height: 100vh !important;
    background-position: center center;
    background-size: cover;
    background-repeat: no-repeat;
}

.banner_text {
    width: 100%;
    position: absolute;
    top: 40%;
    left: 0;
}

.banner_tit {
    font-size: 84px;
    letter-spacing: 5px;
    /* background-color: red; */
}

.banner_subtit {
    font-size: 24px;
    text-transform: uppercase;
    /* background-color: yellow; */
}

.banner .swiper-pagination {
    text-align: left;
    box-sizing: border-box;
    padding-left: 5%;
    /* color: #fff;
    font-size: 24px; */
}

.banner .swiper-pagination-custom {
    bottom: 50px;
}

.banner_current {
    color: #fff;
    font-size: 24px;
}

.banner_line,
.banner_total {
    font-size: 16px;
    color: #b4b4b4;
}

.section2 {
    background-position: right center;
}

.s2_con {
    width: 40%;
}

.s2_text {
    width: 100%;
    height: 500px;
    /* background-color: red; */
}

.s2_tit {
    font-size: 18px;
    opacity: 0.8;
    margin-bottom: 10px;
}

.s2_headline {
    font-size: 40px;
}

.s2_desc {
    font-size: 16px;
    line-height: 2;
    opacity: 0.8;
    padding-right: 10%;
    margin-top: 30px;
    margin-bottom: 50px;
}

.s2_btn {
    width: 30%;
    margin-right: 2%;
    height: 50px;
    line-height: 50px;
    border: 1px solid rgba(255, 255, 255, 0.6);
    border-radius: 5px;
}

.s2_btn:hover {
    border: 1px solid rgba(255, 255, 255, 1);
}

.s2_btn a {
    padding-left: 15px;
    padding-right: 15px;
}

.s2_btn span {
    color: #fff;
    font-size: 18px;
    opacity: 0.8;
}

.s2_btn img {
    margin-top: 15px;
    opacity: 0.8;
}

.s2_btn:hover span,
.s2_btn:hover img {
    opacity: 1;
}

.s3_list {
    width: 20%;
    /* background-color: red; */
}

.s3_list .s3_list_con {
    height: 550px;
    padding: 50px 20px 30px 20px;
}

.s3_list .s3_list_tit {
    /* padding-bottom: 15px;
    padding-top: 15px;
    border-top: 1px solid #2c74ce; */
}

.s3_case {
    width: 80%;
    /* background-color: yellow; */
}

.s3_case_con {
    width: 100%;
    height: 600px;
    /* padding-left: 2%; */
    /* background-color: red; */
}

.s3_case_tit {
    color: #353535;
    font-size: 30px;
    margin-top: 30px;
}

.s3_case ul {
    width: 100%;
    margin-top: 30px;
}

.s3_case li {
    float: left;
    width: calc(25% - 20px);
    margin-right: 20px;
    background-color: #fff;
    border-radius: 5px;
}

.s3_case li a {
    box-sizing: border-box;
    padding: 15px 15px 25px 15px;
}


.s3_case_bann {
    overflow: hidden;
    width: 100%;
    height: 100%;
    margin-left: auto;
    margin-right: auto;
    /* background-color: yellow; */
}


/* .s3_case_bann .swiper-wrapper {
    width: 100%;
    height: 100%;
} */

.s3_case_bann .swiper-slide {
    text-align: center;
    font-size: 18px;
    /* background: #fff; */
    height: calc((100% - 30px) / 2);

    /* Center slide text vertically */
    display: -webkit-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    -webkit-justify-content: center;
    justify-content: center;
    -webkit-box-align: center;
    -ms-flex-align: center;
    -webkit-align-items: center;
    align-items: center;


}

.s3_case_bann .swiper-slide a {
    /* background-color: #008c8c; */
}

.s3_case_img {
    margin-bottom: 20px;
}

.s3_case_img img {
    height: 200px;
    object-fit: cover;
}

.s3_case_item_tit {
    font-size: 16px;
    color: #164fb8;
    /* margin-bottom: 5px; */
}

.s3_case_desc {
    font-size: 14px;
    color: #999;
}

.s4_news {
    width: 50%;
}

.s4_news_con {
    width: 100%;
    height: 600px;
    /* background-color: yellow; */
}

.s4_news_tit {
    font-size: 30px;
    color: #353535;
}

.s4_news_list li {
    border-bottom: 1px solid #ddd;
    padding: 35px 35px 35px 0;
}

.s4_news_list li:last-child {
    border-bottom: none;
}

.s4_news_item_tit {
    font-size: 18px;
    color: #444;
    margin-bottom: 10px;
}

.s4_news_desc {
    font-size: 14px;
    color: #9c9c9c;
    line-height: 2;
}

.s4_news_list li::after {
    content: "";
    position: absolute;
    width: 0%;
    height: 2px;
    left: 0;
    bottom: 0;
    background-color: #164fb8;
    transition: all 0.3s ease;
}

.s4_news_list li:hover::after {
    width: 100%;
}

/* .s4_news_list li:last-child::after {
    background-color: transparent;
} */

.s4_news_list li:hover {
    /* border-bottom: 1px solid #fff; */
    /* transform: ; */
    border-bottom: none;
}

.s4_news_list li:hover .s4_news_item_tit {
    color: #164fb8;
}

.s4_news_btn {
    width: 150px;
    height: 50px;
    line-height: 50px;
    background-color: #f2f2f2;
    margin-top: 50px;
}

.s4_news_btn .text {
    color: #9c9c9c;
    font-size: 16px;
    padding-left: 30px;
}

.s4_news_btn .arrow {
    position: absolute;
    right: 30px;
    top: 20px;
    width: 8px;
    height: 8px;
    border-top: 1px solid #9c9c9c;
    border-right: 1px solid #9c9c9c;
    transform: rotate(45deg);
}

.s4_news_btn:hover {
    /* background-color: #ebeaea; */
}

.s4_news_btn:hover .text {
    padding-left: 27px;
    color: #164fb8;
}

.s4_news_btn:hover .arrow {
    right: 27px;
    border-top: 1px solid #164fb8;
    border-right: 1px solid #164fb8;
}

.s4_bann {
    width: 40%;
    /* background-color: red; */
    overflow: hidden;
}

.s4_bann .s4-swiper-pagination {
    position: absolute;
    bottom: 30px;
    z-index: 10;
    text-align: center;
}

.swiper-container-horizontal>.swiper-pagination-bullets .swiper-pagination-bullet {
    margin: 0 8px;
}

.swiper-pagination-bullet-active {
    background-color: #fff;
}

.swiper-pagination-bullet {
    width: 12px;
    height: 12px;
}

/* .section5 {
    height: auto;
} */
.s3_case_wap {
    display: none;
}

@media (max-width: 1768px) {
    .banner_tit {
        font-size: 80px;
    }

    .s2_headline {
        font-size: 38px;
    }

    .s3_list_con,
    .s3_case_con {
        height: 680px;
    }

    .s3_case_img img {
        height: 185px;
    }

    /* .s4_news_con {
        height: 580px;
    } */
}

@media (max-width: 1680px) {
    .banner_tit {
        font-size: 76px;
    }

    .s2_headline {
        font-size: 36px;
    }

    .s3_list_tit {
        padding-bottom: 30px;
    }

    .s3_list_tit,
    .s3_case_tit,
    .s4_news_tit {
        font-size: 28px;
    }

    .s3_list_con,
    .s3_case_con {
        height: 650px;
    }

    .s4_news_con {
        height: 560px;
    }

    .s3_case_img img {
        height: 170px;
    }

    .s3_case_img {
        margin-bottom: 15px;
    }

    .s3_case li a {
        padding: 15px 15px 20px 15px;
    }
}

@media (max-width: 1600px) {
    .banner_tit {
        font-size: 72px;
    }

    .banner_subtit {
        font-size: 22px;
    }

    .s2_headline {
        font-size: 34px;
    }

    .s3_list_con,
    .s3_case_con {
        height: 630px;
    }

    .s3_list_con {
        width: 180px;
    }

    .s3_list_tit {
        padding-bottom: 30px;
    }

    /* .s4_news_con {
        height: 540px;
    } */

    /* .s4_news_list li {
        padding: 50px 20px 50px 0;
    } */
    .s4_news_list li {
        border-bottom: 1px solid #ddd;
        padding: 30px 20px 30px 0;
    }
}

@media (max-width: 1440px) {
    .banner_tit {
        font-size: 68px;
    }

    .banner_subtit {
        font-size: 20px;
    }

    .s2_headline {
        font-size: 32px;
    }

    .s2_con {
        width: 50%;
    }

    /* .s2_desc {
        font-size: 15px;
    } */
    .s2_btn span {
        font-size: 17px;
    }

    .s3_list_tit,
    .s3_case_tit,
    .s4_news_tit {
        font-size: 26px;
    }

    .s3_list_con,
    .s3_case_con {
        height: 610px;
    }

    /* .s4_news_con {
        height: 540px;
    } */

    .s3_case_img img {
        height: 150px;
    }

    .s3_case_item_tit {
        font-size: 15px;
    }

    /* .s4_news_list li {
        padding: 35px 20px 35px 0;
    } */

    .s4_news_btn {
        width: 135px;
        height: 45px;
        line-height: 45px;
    }

    .s4_news_btn .text {
        font-size: 15px;
    }

    .s4_news_btn .arrow {
        top: 18px;
    }

    .s4_news_list li {
        border-bottom: 1px solid #ddd;
        padding: 20px 20px 20px 0;
    }
}

@media (max-width: 1366px) {
    .banner_tit {
        font-size: 64px;
    }

    .s2_headline {
        font-size: 30px;
    }

    .s2_text {
        height: 480px;
    }

    .s2_btn span {
        font-size: 16px;
    }

    .s3_list_con,
    .s3_case_con {
        height: 580px;
    }

    /* .s4_news_con {
        height: 520px;
    } */

    .s4_news {
        width: 45%;
    }

    .s4_bann {
        width: 50%;
    }

    .s3_case li a {
        padding: 15px;
    }
}

@media (max-width: 1280px) {
    .banner_tit {
        font-size: 60px;
    }

    .banner_subtit {
        font-size: 18px;
    }

    .s2_headline {
        font-size: 28px;
    }

    .s3_list_con,
    .s3_case_con {
        height: 550px;
    }

    /* .s4_news_con {
        height: 500px;
    } */

    .s3_list_con {
        width: 160px;
    }

    .s3_list_tit,
    .s3_case_tit,
    .s4_news_tit {
        font-size: 24px;
    }

    .s3_case ul {
        margin-top: 20px;
    }

    .s3_case_img {
        margin-bottom: 10px;
    }
}

@media (max-width: 1176px) {
    .banner_tit {
        font-size: 56px;
    }

    .s2_headline {
        font-size: 26px;
    }

    .s2_text {
        height: 460px;
    }

    .s3_list_con,
    .s3_case_con {
        height: 520px;
    }

    /* .s4_news_con {
        height: 480px;
    } */

    .s3_case_img img {
        height: 130px;
    }
}

@media (max-width: 1152px) {
    .s2_btn span {
        font-size: 15px;
    }

    .banner_tit {
        font-size: 52px;
    }
}

@media (max-width:1024px) {
    #section1 {
        position: relative;
        top: 0px;
        height: 400px;
    }

    .banner_text {
        top: 200px;
    }

    .section2 {
        margin-top: 0;
    }

    /* .banner,
    .swiper-wrapper {
        height: 600px;
    } */

    .banner_tit {
        font-size: 48px;
    }

    .section {
        width: 100%;
        padding: 0;
    }

    .section1 {
        height: 100vh;
    }

    .wap_section {
        width: 100%;
        box-sizing: border-box;
        padding-left: 5%;
        padding-right: 5%;
    }

    .section2 {
        height: 500px;
        background-position: left center;
    }

    .s2_con {
        height: 100%;
        width: 100%;
    }

    .s2_text {
        padding-top: 60px;
    }

    .s2_desc {
        padding-right: 40%;
        margin-top: 20px;
    }

    .index-box .index-item {
        position: absolute;
        left: 5%;
        top: 0;
        transform: translateY(0);
        width: 90%;
    }

    .section3 {
        height: 1200px;
    }

    .s3_case_bann {
        display: none;
    }

    .s3_case_wap {
        display: block;
    }

    /* .s3_list {
        width: 100%;
        height: 550px;
    } */

    .s3_case {
        width: 100%;
        height: 1250px;
    }

    /* .s3_list_con {
        height: 0;
        margin-top: 50px;
    } */

    .s3_case_con {
        height: 1250px;
        padding-left: 0;
        padding-top: 0;
    }

    .section4 {
        height: 1400px;
    }

    .s4_news {
        width: 100%;
        height: 600px;
    }

    .s4_bann {
        width: 100%;
        height: 800px;
    }

    .s4_news_con {
        height: 600px;
    }

    .s4_news_btn {
        margin-top: 30px;
    }

    .pre_product_list ul li {}

    .s3_case li {
        width: 50%;
        margin-right: 0;
        margin-bottom: 20px;
        background-color: transparent;
    }

    .s3_case li a {
        width: 85%;
        margin-left: auto;
        margin-right: auto;
        background-color: #fff;
    }

    .s3_case li.box-scale:hover {
        transform: scale(1);
        box-shadow: none;
    }

    .s3_case_tit {
        margin-top: 50px;
        text-align: center;
    }

    .s3_case ul {
        margin-top: 50px;
    }

    .s3_case_img img {
        height: 150px;
    }

    .s4_news_tit {
        margin-top: 60px;
    }
}

@media (max-width:992px) {

    /* .banner,
    .swiper-wrapper {
        height: 550px;
    } */
}

@media (max-width:820px) {

    /* .banner,
    .swiper-wrapper {
        height: 450px;
    } */

    .banner_tit {
        font-size: 44px;
    }

    .banner_subtit {
        font-size: 16px;
    }

    .s2_desc {
        padding-right: 25%;
    }

    .s4_bann {
        height: 700px;
    }

    .section4 {
        height: 1300px;
    }
}

@media (max-width:768px) {

    /* .banner,
    .swiper-wrapper {
        height: 420px;
    } */
    #section1 {
        height: 360px;
    }

    .banner_text {
        top: 160px;
    }

    .banner .swiper-pagination-custom {
        bottom: 30px;
    }

    .banner_tit {
        font-size: 40px;
    }

    .section4 {
        height: 1200px
    }

    .s4_bann {
        height: 600px;
    }

    .s3_case li a {
        padding: 15px 15px 20px 15px;
    }

    .s4_news_tit {
        margin-top: 40px;
    }

    .s4_news_btn {
        margin-top: 5px;
    }

    .s2_desc {
        padding-right: 15%;
    }

    .section2 {
        height: 460px;
    }
}

@media (max-width:640px) {

    /* .banner,
    .swiper-wrapper {
        height: 350px;
    } */
    .banner_tit {
        font-size: 36px;
    }

    .banner_text {
        padding: 0 20px;
        box-sizing: border-box;
    }

    .banner_tit {
        font-size: 36px;
    }

    .s2_desc {
        padding-right: 5%;
    }
}

@media (max-width:480px) {

    /* .banner,
    .swiper-wrapper {
        height: 300px;
    } */
    .banner_tit {
        font-size: 30px;
        letter-spacing: 2px;
    }

    .s3_case li {
        width: 100%;
    }

    .section3 {
        height: 2250px;
    }

    .s3_case {
        width: 100%;
        height: 1250px;
    }

    .s3_case li a {
        width: 100%;
    }

    .s3_case_con {
        height: 1950px;
    }

    .section4 {
        height: 1200px;
    }

    .s4_bann {
        height: 550px;
    }

    .s4_news {
        width: 100%;
        height: 650px;
    }

    .s4_news_con {
        height: 650px;
    }

    .s3_case ul {
        margin-top: 30px;
    }

    .s2_headline {
        font-size: 22px;
    }

    .s2_text {
        padding-top: 40px;
    }

    .section2 {
        height: 450px;
    }

    .s4_news_item_tit {
        font-size: 16px;
        margin-bottom: 5px;
    }

    .s4_news_desc {
        line-height: 1.8;
    }

    .s4_news_btn {
        margin-top: 20px;
    }

    .s4_news_list li {
        padding: 25px 10px;
    }

    #section1 {
        height: 300px;
    }

    .banner_text {
        top: 120px;
    }
}

@media (max-width:375px) {

    /* .banner,
    .swiper-wrapper {
        height: 250px;
    } */
    .banner_tit {
        font-size: 28px;
    }

    .s2_desc {
        font-size: 15px;
    }

    .s2_headline {
        font-size: 20px;
    }

    #section1 {
        height: 260px;
    }

    .banner_text {
        top: 100px;
    }

    .banner_tit {
        font-size: 22px;
        left: 1px;
    }

    .banner_subtit {
        font-size: 14px;
    }
}