.first_body {
    position: absolute;
    width: 100%;
    height: 100%;
    z-index: 12;
}

.first_con {
    width: 1200px;
    height: 600px;
    margin: 0 auto;
    margin-top: 120px;
    display: flex;
}

.first_img {
    width: 50%;
    position: relative;
}

.first_img_body {
    position: absolute;
    top: 40%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.first_img_body_img1,
.first_img_body_img2 {
    width: 300px;
}

.first_img_body_img1 img {
    width: 100%;
}

.first_img_body_img2 img {
    width: 80%;
}



.first_context {
    width: 50%;
    position: relative;
    color: #fff;
}

.first_context_body {
    position: absolute;
    top: 45%;
    left: 0%;
    transform: translateY(-50%);
}




.contact-us {
    background-image: url(/static/platform/images/contact-us.jpg);
    background-size: cover;
    background-position: center;
    text-align: center;
    height: 308px;
    color: #fff;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.contact-us-title {
    margin-top: 64px;
    text-align: center;
    font-size: 50px;
    font-family: PingFangSC-Semibold, PingFang SC;
    font-weight: 600;
    color: #fff;
    line-height: 72px;
    letter-spacing: 9px;
}

.contact-us-english-title {
    margin-top: 8px;
    text-align: center;
    font-size: 16px;
    font-family: PingFangSC-Regular, PingFang SC;
    font-weight: 400;
    color: #fff;
    line-height: 28px;
    letter-spacing: 2px;
}

.contact-us-button {
    margin-top: 30px;
    width: 200px;
    height: 48px;
    border-radius: 24px;
    background-color: #fff;
    cursor: pointer;
    font-size: 19px;
    font-family: Alibaba-PuHuiTi-M, Alibaba-PuHuiTi;
    font-weight: 400;
    color: #11BACF;
    text-align: center;
    line-height: 48px;
    letter-spacing: 3px;
}

.devops img {
    width: 90%;
}


/**********************分辨率样式***********************/
@media (min-width:1600px) {
    .container {
        width: 1400px;
        margin: 0 auto;
    }

}

@media (max-width:1600px) {
    .container {
        width: 1400px;
        margin: 0 auto;
    }

}

@media (max-width:1500px) {
    .container {
        width: 1300px;
        margin: 0 auto;
    }

}

@media (max-width:1400px) {
    .container {
        width: 1100px;
        margin: 0 auto;
    }

    .first_con {
        width: 1100px;
    }

    .jf_system .system_title {
        background: url(/static/platform/presentimg/jf-bk.png) no-repeat;
        background-size: 100%;
        width: 420px;
        font-size: 28px;
    }

    .jf_system .system_info {
        width: 420px;
    }



    .contact-us {
        height: 270px;
    }

    .contact-us-title {
        margin-top: 40px;
        font-size: 40px;
        line-height: 60px;
    }

    .contact-us-english-title {
        font-size: 14px;
        line-height: 20px;
    }
}

@media (max-width:1200px) {
    .container {
        width: 900px;
        margin: 0 auto;
    }

    .wrapper {
        height: 80px;
    }

    .product_details .bannerN {
        height: 600px;
    }

    .first_img_body_img1,
    .first_img_body_img2 {
        width: 240px;
    }

    .first_con {
        width: 900px;
        height: 400px;
        margin-top: 80px;
    }

    .jf_system .system_title {
        width: 380px;
        height: 60px;
        font-size: 22px;
        line-height: 30px;
        background: url(/static/platform/presentimg/jf-bk.png) no-repeat;
        background-size: 100% 100%;
    }

    .jf_system .system_info {
        width: 380px;
    }



    .contact-us {
        height: 160px;
    }

    .contact-us-title {
        margin-top: 20px;
        font-size: 30px;
        line-height: 40px;
    }

    .contact-us-english-title {
        font-size: 12px;
        line-height: 14px;
    }

    .contact-us-button {
        margin-top: 20px;
        width: 180px;
        height: 40px;
        border-radius: 20px;
        font-size: 17px;
        line-height: 40px;
    }

}



@media (max-width:992px) {
    .wrapper {
        height: 70px;
    }

}

@media (max-width:769px) {
    .product_details .bannerN {
        height: 520px;
    }

    .first_img {
        display: none;
    }

    .first_con {
        width: 630px;
        height: 350px;
        position: relative;
    }

    .first_context {
        width: 100%;

    }

    .first_context_body {
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
    }

}

@media (max-width:640px) {
    .container {
        width: 460px;
    }


    .product_details .bannerN {
        height: 350px;
    }

    .wrapper {
        height: 50px;
    }

    .first_con {
        width: 440px;
        margin-top: 0;
    }

    .jf_system .system_title {
        width: 270px;
        height: 45px;
        font-size: 14px;
        line-height: 10px;
    }

    .jf_system .system_info {
        width: 270px;
        height: 130px;
        line-height: 20px;
        font-size: 10px;
    }

    .contact-us {
        height: 120px;
    }

    .contact-us-title {
        margin-top: 20px;
        font-size: 18px;
        line-height: 24px;
    }

    .contact-us-english-title {
        font-size: 8px;
        line-height: 4px;
    }

    .contact-us-button {
        margin-top: 12px;
        width: 140px;
        height: 30px;
        border-radius: 15px;
        font-size: 12px;
        line-height: 30px;
    }

    b {
        font-size: 18px;
    }

    .mtb40 {
        margin-top: 20px;
        margin-bottom: 20px;
    }

    .background1 {
        padding: 10px;
        font-size: 12px;
    }

    .line-height30 {
        line-height: 25px;
    }
}

@media (max-width:460px) {
    .container {
        width: 340px;
    }

    .wrapper {
        height: 25px;
    }

    .product_details .bannerN {
        height: 290px;
    }

    .first_context_body {
        top: 44%;
    }

    .jf_system .system_title {
        width: 240px;
        height: 35px;
        font-size: 12px;
        line-height: 6px;
    }

    .jf_system .system_info {
        width: 240px;
        height: 120px;
        line-height: 16px;
        font-size: 9px;
    }

    .first_con {
        width: 340px;
    }


    .contact-us {
        height: 100px;
    }

    .contact-us-title {
        margin-top: 18px;
        font-size: 15px;
        line-height: 22px;
    }

    .contact-us-english-title {
        font-size: 7px;
        line-height: 3px;
    }

    .contact-us-button {
        margin-top: 12px;
        width: 100px;
        height: 26px;
        border-radius: 13px;
        font-size: 11px;
        line-height: 26px;
    }


}

@media (max-width:360px) {
    .container {
        width: 290px;
    }

    .mtb40 {
        margin-top: 10px;
        margin-bottom: 10px;
    }

    b {
        font-size: 15px;
    }

    .line-height30 {
        line-height: 20px;
    }

    .background1 {
        padding: 8px;
        font-size: 10px;
    }
}

@media (max-width:300px) {
    .container {
        width: 270px;
        padding-left: 0;
        padding-right: 0;
    }

    .first_con {
        width: 270px;
    }

    .product_details .bannerN {
        height: 240px;
    }

    .first_context_body {
        top: 40%;
    }

    .jf_system .system_title {
        width: 200px;
        height: 30px;
        font-size: 10px;
        line-height: 4px;
        margin-bottom: 10px;
    }

    .jf_system .system_info {
        width: 200px;
        height: 120px;
        line-height: 14px;
        font-size: 7px;
    }



    .contact-us-title {
        margin-top: 10px;
        font-size: 10px;
    }

    .contact-us-english-title {
        font-size: 5px;
        line-height: 0px;
    }

    .contact-us-button {
        margin-top: 12px;
        width: 80px;
        height: 20px;
        border-radius: 10px;
        font-size: 9px;
        line-height: 20px;
    }

    .contact-us {
        height: 90px;
    }
}