.product_info {
    margin: 80px auto 60px;
    width: 1440px;
}

.info_left_box {
    width: 460px;
    float: left;
}

.info_left_box .info_left_photos {
    width: 100%;
}

.info_left_box .info_left_photos .main-image img {
    width: 459px;
    height: 459px;
}

.info_left_box .info_left_photos .thumbnail-gallery {
    width: 437px;
    height: 96px;
    padding-left: 15px;
    position: relative;
    margin-top: 24px;
}

.info_left_box .info_left_photos .thumbnail-gallery .thumbnail-gallery-list {
    width: 423px;
    height: 98px;
    display: flex;
    overflow-x: hidden;
    justify-content: flex-start;

}

.info_left_box .info_left_photos .thumbnail-gallery .thumbnail-gallery-list .thumbnail-gallery-item {
    width: 98px;
    height: 98px;
    margin-left: 12px;
    scroll-snap-align: start;
    cursor: pointer;
    float: left;
}

.info_left_box .info_left_photos .thumbnail-gallery .thumbnail-gallery-list .thumbnail-gallery-item.active {
    border: 1px solid #003F9B;
}

.info_left_box .info_left_photos .thumbnail-gallery .thumbnail-gallery-list .thumbnail-gallery-item:first-child {
    margin-left: 0;
}

.info_left_box .info_left_photos .thumbnail-gallery .thumbnail-gallery-list .thumbnail-gallery-item img {
    width: 96px;
    height: 96px;
}

.info_left_box .info_left_photos .thumbnail-gallery .proto-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 12px;
    height: 22px;
    cursor: pointer;
}

.prev-btn {
    left: -5px;
}

.next-btn {
    right: -20px;
}


/**
 * products params styles
 ***/
.info_middle_box{
    width: 460px;
    /*max-height: 579px;*/
    /*overflow-y: auto;*/
    /*overflow-x: hidden;*/
    float: left;
    margin-left: 30px;
}
.info_middle_box .info_middle_title{
    font-family: Arial, Arial;
    font-weight: bold;
    font-size: 34px;
    color: #333333;
    line-height: 56px;
    margin-bottom: 20px;
}
.info_middle_box .info_middle_line{
    width: 460px;
    height: 1px;
    background: #ECECEC;
}
.info_middle_box .info_middle_item{
    font-family: Arial, Arial;
    font-size: 16px;
    color: #666666;
    line-height: 50px;
}
.info_middle_box .info_middle_item .item_title{
    font-weight: bold;
    color: #333333;
    float: left;
}
.info_middle_box .info_middle_item .item_content{
    margin-left: 167px;
}
.info_middle_box .info_middle_file{
    margin-top: 24px;
    line-height: 27px;
    cursor: pointer;
}
.info_middle_box .info_middle_file img.file{
    margin-right: 16px;
    margin-top: -5px;
}
.info_middle_box .info_middle_file img.download{
    margin-top: 1px;
    margin-left: 16px;
}
.info_middle_box .info_middle_apply{
    margin-top: 24px;
    font-family: Arial, Arial;
    font-size: 16px;
    color: #333333;
    line-height: 30px;
}
.info_middle_box .info_middle_apply span{
    font-weight: bold;
}
.info_middle_box .info_middle_mark{
    margin-top: 24px;
    font-family: Arial, Arial;
    font-weight: bold;
    font-size: 16px;
    color: #333333;
    line-height: 30px;
    display: flex;
}
.info_middle_box .info_middle_mark .info_middle_mark_img img{
    margin-left: 20px;
}

/**
 * products input styles
 ***/
.info_right_box{
    width: 460px;
    height: 579px;
    border: 1px solid #8E8E8E;
    float: left;
    padding: 30px 20px;
    margin-left: 30px;
    /*overflow-y: auto;*/
}
.info_right_box .info_right_tips{
    font-family: Arial, Arial;
    font-size: 16px;
    color: #2980D3;
    line-height: 30px;
}
.info_right_box .info_right_item{
    margin-top: 15px;
}
.info_right_box .info_right_item .info_right_item_title{
    font-family: Arial, Arial;
    font-weight: bold;
    font-size: 16px;
    color: #333333;
    float: left;
    line-height: 46px;
}
.info_right_box .info_right_item .info_right_item_content{
    margin-left: 143px;
}
.info_right_box .info_right_item .info_right_item_content input{
    width: 277px;
    height: 46px;
    border-radius: 30px;
    border: 1px solid #ECECEC;
    padding-left: 20px;
}
.info_right_box .info_right_item .info_right_item_content .info_right_item_content_select{
    width: 130px;
    height: 46px;
    border: 1px solid #ECECEC;
    border-radius: 30px;
    font-size: 16px;
    color: #333333;
    line-height: 46px;
    padding-left: 20px;
    margin-left: 10px;
}
.info_right_box .info_right_item .info_right_item_content .info_right_item_content_select_arm_type{
    width: 277px;
}
.info_right_box .info_right_item .info_right_item_content .info_right_item_content_select:first-child{
    margin-left: 0;
}
.info_right_box .info_right_item_checkbox .info_right_item_title{
    line-height: 16px;
    float: none;
}
.info_right_box .info_right_item_checkbox .info_right_item_content{
    margin-left: 0;
    margin-top: 10px;
}
.info_right_box .info_right_item_checkbox .info_right_item_content .info_right_item_content_level{
    width: 60px;
    height: 32px;
    background: #FFFFFF;
    border-radius: 16px;
    border: 1px solid #ECECEC;
    font-family: Arial, Arial;
    font-size: 16px;
    color: #999999;
    line-height: 32px;
    text-align: center;
    float: left;
    margin-left: 10px;
    cursor: pointer;
}
.info_right_box .info_right_item_checkbox .info_right_item_content .info_right_item_content_level:first-child{
    margin-left: 0;
}
.info_right_box .info_right_item_checkbox .info_right_item_content .info_right_item_content_level.active{
    background: #2980D3;
    color: #FFFFFF;
}
.info_right_box .info_right_btn{
    margin-top: 20px;
    float: left;
    width: 146px;
    height: 42px;
    background: #2980D3;
    border-radius: 25px;
    line-height: 42px;
    text-align: center;
    color: #FFFFFF;
    cursor: pointer;
}
.info_right_box .info_right_btn.info_right_chat{
    background-color: #FFBE53;
    margin-left: 20px;
}


/**
 * hot products styles
 **/
.hot-products{
    max-width: 1440px;
    margin: 60px auto;
}
.hot-products .hot-products-title{
    font-family: Arial, Arial;
    font-weight: bold;
    font-size: 42px;
    color: #333333;
    line-height: 42px;
    text-align: center;
    font-style: italic;
}
.hot-products .hot-products-list ul{
    display: flex;
    flex-wrap: wrap;
    margin-top: 30px;
}
.hot-products-list .product_item{
    width: 337px;
    margin-right: 30px;
    margin-bottom: 30px;
}
.hot-products-list .product_item:last-child{
    margin-right: 0;
}
.hot-products-list .product_item .product_list_item_img{
    width: 100%;
    height: 337px;
    margin-bottom: 15px;
    position: relative;
    overflow: hidden;
}
.hot-products-list .product_item .product_list_item_img img{
    width: 100%;
    height: 100%;
}
.hot-products-list .product_item .product_list_item_img::before {
    position: absolute;
    top: 0;
    left: -100%;
    z-index: 2;
    display: block;
    content: '';
    width: 50%;
    height: 100%;
    background: linear-gradient(to right, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.7) 100%);
    transform: skewX(-25deg);
}
.hot-products-list .product_item:hover .product_list_item_img::before {
    -webkit-animation: shine .75s;
    animation: shine .75s;
}
@-webkit-keyframes shine {
    100% {
        left: 125%;
    }
}
@keyframes shine {
    100% {
        left: 100%;
    }
}
.hot-products-list .product_item .product_list_item_title{
    font-family: Arial, Arial;
    font-weight: bold;
    font-size: 20px;
    color: #333333;
    line-height: 30px;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}
.hot-products-list .product_item .product_list_item_category{
    font-family: Arial, Arial;
    font-size: 16px;
    color: #333333;
    line-height: 24px;
    margin-top: 10px;
}
.hot-products-list .product_item:hover .product_list_item_title, .product_list .product_item:hover .product_list_item_category{
    color: #2980D3;
}
.hot-products-list .product_item .product_list_item_btn div{
    margin-top: 10px;
    float: left;
    width: 100px;
    height: 36px;
    background: #2980D3;
    border-radius: 25px;
    line-height: 36px;
    text-align: center;
    color: #FFFFFF;
    cursor: pointer;
    font-size: 12px;
}
.hot-products-list .product_item .product_list_item_btn .product_list_item_btn_download{
    background-color: #FFBE53;
    margin-left: 20px;
}


/**
 * product content styles
 **/
.product-content{
    max-width: 1440px;
    margin: 60px auto;
    border: 1px solid #8E8E8E;
    padding: 30px;
}
.product-content .product-content-title{
    font-family: Arial, Arial;
    font-size: 20px;
    color: #333333;
    line-height: 54px;
    font-style: italic;
    font-weight: bold;
}
.product-content .product-content-text{
    font-family: Arial, Arial;
    font-size: 16px;
    color: #333333;
    line-height: 30px;
}
.product-content .product-content-text p,
.product-content .product-content-text span{
    text-wrap: wrap !important;
}
.product-content .product-content-case{
    margin: 20px auto 30px;
}
.product-content .product-content-case ul{
    display: flex;
    flex-wrap: wrap;
}
.product-content .product-content-case ul .product-content-case-item{
    width: 330px;
    height: 330px;
    margin-right: 20px;
    cursor: pointer;
    overflow: hidden;
}
.product-content .product-content-case ul .product-content-case-item:nth-child(4n){
    margin-right: 0;
}
.product-content .product-content-case ul .product-content-case-item img{
    width: 100%;
    height: 100%;
    transition: transform 0.5s ease;
}
.product-content .product-content-case ul .product-content-case-item:hover img{
    transform: scale(1.1);
}
.product-content .product-content-certificate{
    margin: 20px auto 30px;
}
.product-content .product-content-certificate ul{
    display: flex;
    flex-wrap: wrap;
}
.product-content .product-content-certificate ul .product-content-certificate-item{
    width: 229px;
    height: 322px;
    margin-right: 58px;
    cursor: pointer;
    overflow: hidden;
}
.product-content .product-content-certificate ul .product-content-certificate-item:nth-child(5n){
    margin-right: 0;
}
.product-content .product-content-certificate ul .product-content-certificate-item img{
    width: 100%;
    height: 100%;
    transition: transform 0.5s ease;
}
.product-content .product-content-certificate ul .product-content-certificate-item:hover img{
    transform: scale(1.1);
}



@media only screen and (min-width: 1080px) and (max-width: 1440px) {
    .product_info{
        width: 1080px;
    }
    .info_left_box{
        width: 340px;
    }
    .info_left_box .info_left_photos .main-image img{
        width: 338px;
        height: 338px;
    }
    .info_left_box .info_left_photos .thumbnail-gallery{
        width: 330px;
        height: 72px;
        margin-top: 0;
    }
    .info_left_box .info_left_photos .thumbnail-gallery .thumbnail-gallery-list{
        width: 312px;
        height: 72px;
    }
    .info_left_box .info_left_photos .thumbnail-gallery .thumbnail-gallery-list .thumbnail-gallery-item{
        width: 72px;
        height: 72px;
        margin-left: 8px;
    }
    .info_left_box .info_left_photos .thumbnail-gallery .thumbnail-gallery-list .thumbnail-gallery-item img{
        width: 70px;
        height: 70px;
    }
    .next-btn{
        right: -12px;
    }

    .info_middle_box{
        width: 340px;
    }
    .info_middle_box .info_middle_title{
        font-size: 26px;
        line-height: 48px;
        margin-bottom: 10px;
    }
    .info_middle_box .info_middle_item{
        font-size: 14px;
        line-height: 36px;
    }
    .info_middle_box .info_middle_item .item_content{
        margin-left: 110px;
    }
    .info_middle_box .info_middle_line{
        width: 100%;
    }
    .info_middle_box .info_middle_file{
        margin-top: 12px;
    }
    .info_middle_box .info_middle_apply{
        margin-top: 12px;
        font-size: 14px;
        line-height: 24px;
    }
    .info_middle_box .info_middle_mark{
        margin-top: 12px;
        font-size: 14px;
        line-height: 24px;
    }

    .info_right_box{
        width: 340px;
        padding: 10px;
        height: 410px;
    }
    .info_right_box .info_right_tips{
        font-size: 14px;
        line-height: 24px;
    }
    .info_right_box .info_right_item{
        margin-top: 10px;
    }
    .info_right_box .info_right_item .info_right_item_title{
        font-size: 14px;
        line-height: 30px;
    }
    .info_right_box .info_right_item .info_right_item_content{
        margin-left: 110px;
    }
    .info_right_box .info_right_item_checkbox .info_right_item_content{
        margin-left: 0;
    }
    .info_right_box .info_right_item .info_right_item_content input{
        width: 208px;
        height: 30px;
        padding-left: 10px;
    }
    .info_right_box .info_right_item .info_right_item_content input::placeholder{
        font-size: 12px;
    }
    .info_right_box .info_right_item .info_right_item_content .info_right_item_content_select{
        width: 96px;
        height: 30px;
        padding-left: 10px;
    }
    .info_right_box .info_right_item_checkbox .info_right_item_content .info_right_item_content_level{
        width: 48px;
        height: 28px;
        font-size: 14px;
        line-height: 28px;
        margin-left: 8px;
    }
    .info_right_box .info_right_btn{
        width: 120px;
        height: 36px;
        line-height: 36px;
    }


    .hot-products{
        max-width: 1080px;
    }
    .hot-products-list .product_item{
        width: 255px;
        margin-right: 20px;
    }
    .hot-products-list .product_item .product_list_item_img{
        height: 255px;
    }
    .hot-products-list .product_item .product_list_item_title{
        font-size: 18px;
    }
    .hot-products-list .product_item .product_list_item_category{
        font-size: 14px;
    }

    .product-content{
        max-width: 1080px;
        padding: 20px;
    }
    .product-content .product-content-case ul .product-content-case-item{
        width: 255px;
        height: 255px;
    }
    .product-content .product-content-certificate ul .product-content-certificate-item{
        margin-right: 30px;
    }
    .product-content .product-content-certificate ul .product-content-certificate-item:nth-child(5n){
        margin-right: 30px;
    }
    .product-content .product-content-certificate ul .product-content-certificate-item:nth-child(4n){
        margin-right: 0
    }
}


@media only screen and (min-width: 800px) and (max-width: 1080px) {
    .product_info{
        width: 800px;
        margin: 40px auto;
    }
    .info_left_box{
        width: 460px;
        margin: 40px auto;
        float: none;
    }

    .info_middle_box{
        width: 340px;
    }
    .info_middle_box .info_middle_title{
        font-size: 26px;
        line-height: 48px;
        margin-bottom: 10px;
    }
    .info_middle_box .info_middle_item{
        font-size: 14px;
        line-height: 36px;
    }
    .info_middle_box .info_middle_item .item_content{
        margin-left: 110px;
    }
    .info_middle_box .info_middle_line{
        width: 100%;
    }
    .info_middle_box .info_middle_file{
        margin-top: 12px;
    }
    .info_middle_box .info_middle_apply{
        margin-top: 12px;
        font-size: 14px;
        line-height: 24px;
    }
    .info_middle_box .info_middle_mark{
        margin-top: 12px;
        font-size: 14px;
        line-height: 24px;
    }

    .info_right_box{
        width: 340px;
        padding: 10px;
        height: 410px;
        float: right;
    }
    .info_right_box .info_right_tips{
        font-size: 14px;
        line-height: 24px;
    }
    .info_right_box .info_right_item{
        margin-top: 10px;
    }
    .info_right_box .info_right_item .info_right_item_title{
        font-size: 14px;
        line-height: 30px;
    }
    .info_right_box .info_right_item .info_right_item_content{
        margin-left: 110px;
    }
    .info_right_box .info_right_item_checkbox .info_right_item_content{
        margin-left: 0;
    }
    .info_right_box .info_right_item .info_right_item_content input{
        width: 208px;
        height: 30px;
        padding-left: 10px;
    }
    .info_right_box .info_right_item .info_right_item_content input::placeholder{
        font-size: 12px;
    }
    .info_right_box .info_right_item .info_right_item_content .info_right_item_content_select{
        width: 96px;
        height: 30px;
        padding-left: 10px;
    }
    .info_right_box .info_right_item_checkbox .info_right_item_content .info_right_item_content_level{
        width: 48px;
        height: 28px;
        font-size: 14px;
        line-height: 28px;
        margin-left: 8px;
    }
    .info_right_box .info_right_btn{
        width: 120px;
        height: 36px;
        line-height: 36px;
    }


    .hot-products{
        max-width: 800px;
    }
    .hot-products-list .product_item{
        width: 255px;
        margin-right: 10px;
    }
    .hot-products-list .product_item:nth-child(n+4){
        display: none;
    }
    .hot-products-list .product_item .product_list_item_img{
        height: 255px;
    }
    .hot-products-list .product_item .product_list_item_title{
        font-size: 18px;
    }
    .hot-products-list .product_item .product_list_item_category{
        font-size: 14px;
    }

    .product-content{
        max-width: 800px;
        padding: 20px;
    }
    .product-content .product-content-case ul .product-content-case-item{
        width: 242px;
        height: 242px;
        margin-right: 10px
    }
    .product-content .product-content-certificate ul .product-content-certificate-item{
        margin-right: 20px;
    }
    .product-content .product-content-certificate ul .product-content-certificate-item:nth-child(5n){
        margin-right: 20px;
    }
    .product-content .product-content-certificate ul .product-content-certificate-item:nth-child(3n){
        margin-right: 0
    }
}