body {
    position: relative;
}

.video_mask {
    position: absolute;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.2);
    z-index: 100;
    display: none;
}

.video_mask video {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 720px;
    height: 405px;
    background-color: #000;
}

.video_mask .close {
    color: #FFFFFF;
    position: fixed;
    top: 20%;
    left: 80%;
    z-index: 999;
    width: 32px;
    height: 32px;
    text-align: center;
    line-height: 30px;
    cursor: pointer;
    background-image: url(/assets/images/conference-close.png);
}

.body_bg {
    width: 100%;
    height: 800px;
    position: absolute;
    top: 0;
    left: 0;
    z-index: -1;
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center top;
}

.eszwy {
    background-image: url(/assets/images/caseSelection/good_case/eszwy_bg.jpg);
}

.gszg {
    background-image: url(/assets/images/caseSelection/good_case/gszg_bg.jpg);
}

.xyjt {
    background-image: url(/assets/images/caseSelection/good_case/xyjt_bg.jpg);
}

.qlyh {
    background-image: url(/assets/images/caseSelection/good_case/qlyh_bg.jpg);
}

.esgd {
    background-image: url(/assets/images/caseSelection/good_case/esgd_bg.jpg);
}

.ahjk {
    background-image: url(/assets/images/caseSelection/good_case/ahjk_bg.jpg);
}

.yxgf {
    background-image: url(/assets/images/caseSelection/good_case/yxgf_bg.jpg);
}

.fzzy {
    background-image: url(/assets/images/caseSelection/good_case/fzzy_bg.jpg);
}

.flhmg {
    background-image: url(/assets/images/caseSelection/good_case/flhmg_bg.jpg);
}

.tldx {
    background-image: url(/assets/images/caseSelection/good_case/tldx_bg.jpg);
}

.kkwl {
    background-image: url(/assets/images/caseSelection/good_case/kkwl_bg.jpg);
}

.nxhl {
    background-image: url(/assets/images/caseSelection/good_case/nxhl_bg.jpg);
}

/* 顶部 */

#header {
    width: 1280px;
    height: 800px;
    margin-left: auto;
    margin-right: auto;
    padding-top: 270px;
    position: relative;
}

#header>.play_icon {
    width: 66px;
    height: 62px;
    background-image: url(/assets/images/caseSelection/good_case/play.svg);
    position: absolute;
    top: 45%;
    left: 70%;
    cursor: pointer;
}

#header>.title {
    font-size: 48px;
    color: #FFFFFF;
    line-height: 64px;
}

#header>.desc {
    width: 600px;
    font-size: 20px;
    color: #FFFFFF;
    line-height: 32px;
    margin-top: 20px;
    margin-bottom: 30px;
}

#header>.bt {
    display: inline-block;
    background: #FFFFFF;
    box-shadow: 0px 1px 10px 0px rgba(45, 118, 231, 0.3);
    border-radius: 2px;
    padding: 10px 20px;
    font-size: 16px;
    color: #007FDF;
    line-height: 20px;
    cursor: pointer;
    user-select: none;
    position: relative;
    transition: transform 0.3s linear;
}

#header>.bt:hover {
    transform: translateY(-2px);
}

#header>.bt a {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* 中间 */

#container {
    width: 1200px;
    margin: 0 auto 120px;
}

.common_title {
    font-size: 32px;
    color: #1A2736;
    line-height: 40px;
    text-align: center;
}

/* 中间 - 业务背景 */

#container .business_bg {
    margin-top: 115px;
}

.business_bg .bg_block {
    margin-top: 60px;
    display: flex;
    justify-content: space-between;
}

.business_bg .bg_block .img {
    width: 500px;
    height: auto;
}

.business_bg .bg_block .text {
    width: 660px;
    font-size: 16px;
    color: #5E6978;
    line-height: 30px;
}

/* 中间 - 客户证言 */

#container .customer_testimonial {
    margin-top: 120px;
}

.customer_testimonial .customer_block {
    position: relative;
    margin-top: 50px;
    background: #FFFFFF;
}

.customer_block>div {
    font-size: 16px;
    line-height: 30px;
    padding: 25px 60px;
    border: 1px solid #D6D6D6;
}

.customer_block .text {
    position: relative;
    z-index: 20;
    color: #5E6978;
    text-align: center;
}

.customer_block .border {
    width: 100%;
    position: absolute;
    z-index: -1;
    color: #FFFFFF;
}

.customer_block .border1 {
    top: 5px;
    left: -5px;
}

.customer_block .border2 {
    top: 10px;
    left: -10px;
}

/* 中间 - 业务挑战  */

#container .challenge {
    margin-top: 120px;
}

.challenge .challenge_block {
    margin-top: 50px;
    display: flex;
    justify-content: space-between;
}

.challenge .challenge_block .challenge_item {
    width: 386px;
    padding: 40px 32px 30px;
    background: #F2FAFF;
    border-radius: 4px;
    border: 1px solid #D6D6D6;
}

.challenge_item>.title {
    font-size: 20px;
    color: #1A2736;
    line-height: 28px;
}

.challenge_item>ul {
    margin-top: 30px;
}

.challenge_item>ul>li {
    font-size: 16px;
    color: #5E6978;
    line-height: 30px;
    list-style-type: disc;
    text-align: justify;
}

/* 场景 */

#screen {
    padding-top: 60px;
    padding-bottom: 80px;
    background: #F5F5F6;
}

#screen .screen_block {
    width: 1200px;
    margin: 50px auto 0;
    display: flex;
    justify-content: space-between;
}

.screen_block .screen_item {
    width: 580px;
    padding: 40px 0;
    background: #FFFFFF;
    border-radius: 4px;
    text-align: center;
    background-repeat: no-repeat;
    background-position-y: 100%;
    background-position-x: 90%;
}

.screen_item.item1 {
    background-image: url(/assets/images/caseSelection/good_case/screen1.svg);
}

.screen_item.item2 {
    background-image: url(/assets/images/caseSelection/good_case/screen2.svg);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.screen_block .screen_item .text {
    font-size: 20px;
    font-weight: 500;
    color: #1A2736;
    line-height: 36px;
}

.screen_block .screen_item .bt {
    box-shadow: 0px 5px 20px 0px rgba(198, 211, 220, 0.1);
    border-radius: 4px;
    border: 1px solid #007FDF;
    font-size: 14px;
    color: #007FDF;
    line-height: 26px;
    display: inline-block;
    cursor: pointer;
    user-select: none;
    margin-top: 10px;
    padding: 0 15px;
    transition: all 0.3s linear;
    position: relative;
}

.screen_block .screen_item .bt a {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.screen_block .screen_item .bt .more_icon {
    display: inline-block;
    width: 12px;
    height: 10px;
    background-image: url(/assets/images/caseSelection/arrow_detail.svg);
    margin-left: 10px;
}

.screen_block .screen_item .bt:hover {
    color: #FFFFFF;
    background-color: #007FDF;
}

.screen_block .screen_item .bt:hover .more_icon {
    background-image: url(/assets/images/indexn/home_arrow_l.svg);
}

/* 业务价值 */

#value {
    padding-top: 120px;
    padding-bottom: 120px;
}

#value .value_block {
    width: 1200px;
    margin: 50px auto 0;
    display: flex;
    justify-content: space-between;
}

.value_block .value_item {
    width: 360px;
}

.value_item .top_title {
    display: flex;
    align-items: center;
}

.value_item .top_title .icon {
    width: 42px;
    height: 42px;
    background-image: url(/assets/images/caseSelection/good_case/icon.svg);
}

.top_title .icon.icon2 {
    background-position-x: -42px;
}

.top_title .icon.icon3 {
    background-position-x: -84px;
}

.value_item .top_title .title {
    font-size: 20px;
    color: #1A2736;
    line-height: 42px;
    margin-left: 25px;
}

.value_item .text {
    font-size: 16px;
    color: #5E6978;
    line-height: 30px;
    margin-top: 30px;
}

/* 用户谏言 */

#bottom_block {
    width: 100%;
    max-width: 1920px;
    height: 145px;
    margin-left: auto;
    margin-right: auto;
    display: flex;
    justify-content: center;
    align-items: center;
    background-image: url(/assets/images/caseSelection/good_case/bottom_bg.svg);
    background-repeat: no-repeat;
}

#bottom_block>.title {
    font-size: 36px;
    color: #FFFFFF;
    line-height: 40px;
}

#bottom_block>.more_bt {
    border-radius: 4px;
    border: 1px solid #FFFFFF;
    padding: 15px 50px;
    font-size: 20px;
    color: #FFFFFF;
    line-height: 28px;
    user-select: none;
    cursor: pointer;
    margin-left: 12%;
    transition: all 0.3s linear;
    position: relative;
}

#bottom_block>.more_bt:hover {
    background: #ffffff1a;
    box-shadow: 0 3px 10px 0 rgb(94 105 120 / 14%);
    transform: translateY(-2px);
}

#bottom_block>.more_bt a {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

@media screen and (max-width: 1280px) {
    #container {
        width: 80%;
    }
    .business_bg .bg_block {
        flex-direction: column-reverse;
        align-items: center;
    }
    .business_bg .bg_block .text {
        width: 100%;
        margin-bottom: 30px;
    }
    .challenge .challenge_block {
        margin-top: 20px;
        flex-direction: column;
        align-items: center;
    }
    .challenge .challenge_block .challenge_item {
        margin-top: 30px;
        width: 450px;
        padding-left: 40px;
        padding-right: 40px;
    }
    #screen .screen_block, #value .value_block {
        width: 80%;
        flex-direction: column;
        align-items: center;
        margin-top: 20px;
    }
    .screen_block .screen_item {
        margin-top: 30px;
    }
    .value_block .value_item {
        margin-top: 50px;
        width: 450px;
    }
    #header {
        width: 980px;
    }
}

@media screen and (max-width: 980px) {
    #header {
        width: 80%;
    }
    .video_mask video {
        width: 80%;
        height: auto;
    }
    .video_mask .close{
        left: 50%;
        top: 15%;
        transform: translateX(-50%);
    }
}

@media screen and (max-width: 680px) {
    .screen_block .screen_item {
        width: 100%;
    }
}

@media screen and (max-width: 625px) {
    .business_bg .bg_block .img {
        width: 100%;
    }
    .challenge .challenge_block .challenge_item {
        width: 100%;
        padding-right: 30px;
    }
    .value_block .value_item {
        width: 100%;
    }
    #bottom_block {
        flex-direction: column;
    }
    #bottom_block>.more_bt {
        margin-left: 0;
        margin-top: 20px;
        padding-top: 10px;
        padding-bottom: 10px;
    }
    #header>.desc {
        width: 100%;
    }
}