.case1 {
    background: url(../images_pc/case1bg.jpg) center no-repeat;
    background-size: cover
}

.case1 .wrap {
    padding-top: 170px;
    padding-bottom: 170px
}

.case1 .title {
    background: url(../images_pc/about1_titlezs.png) left center no-repeat;
    background-size: 38px;
    font-size: 48px;
    color: #ffffff;
    font-family: 'pingfang_h'
}

.case1 .text {
    width: 600px;
    margin-top: 18px;
    font-size: 18px;
    color: #dedede;
    line-height: 1.77778;
    font-family: 'pingfang_m'
}

.case1 .title,
.case1 .text {
    padding-left: 68px
}

.case2 .wrap {
    padding-top: 80px;
    padding-bottom: 80px
}

.case2 dl {
    margin-top: 100px;
    position: relative;
    z-index: 1
}

.case2 dl:before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    background: url(../images_pc/case2bg.jpg) right center no-repeat;
    z-index: -1
}

.case2 dl dd {
    width: 57.14286%;
    border-radius: 16px;
    overflow: hidden
}

.case2 dl dd img {
    width: 100%;
    display: block;
    transition: all linear 0.3s
}

.case2 dl dd:hover img {
    transform: scale(1.1)
}

.case2 dl dt {
    width: 38.78571%;
    position: absolute;
    right: 0;
    top: 33px;
    bottom: 26px
}

.case2 dl dt h3 {
    font-size: 28px;
    font-family: 'pingfang_h';
    line-height: 1.3
}

.case2 dl dt h3 a {
    color: #111111;
    transition: all linear 0.3s
}

.case2 dl dt h3 a:hover {
    color: #517cc9
}

.case2 dl dt .text {
    margin-top: 22px;
    font-size: 18px;
    color: #555555;
    line-height: 1.66667;
    font-family: 'pingfang_m'
}

.case2 dl dt .cs {
    margin-top: 40px;
    overflow: hidden
}

.case2 dl dt .cs p {
    float: left;
    padding-left: 21px;
    position: relative;
    font-size: 18px;
    color: #517cc9;
    font-family: 'pingfang_b'
}

.case2 dl dt .cs p:before {
    content: "";
    width: 8px;
    height: 8px;
    position: absolute;
    left: 0;
    top: 4px;
    background: #517cc9;
    border-radius: 50%
}

.case2 dl dt .cs p span {
    display: block;
    margin-top: 10px;
    font-size: 30px;
    font-family: 'pingfang_h'
}

.case2 dl dt .cs p+p {
    margin-left: 18.41621%
}

.case2 dl dt .swtbtn {
    width: 236px;
    display: block;
    position: absolute;
    left: 0;
    bottom: 0;
    background-color: #ff6935;
    background-image: linear-gradient(to right, #ff6935, #ff952d);
    border-radius: 40px;
    font-size: 20px;
    color: #ffffff;
    text-align: center;
    line-height: 3.1;
    font-family: 'pingfang_b';
    cursor: pointer;
    transition: all linear 0.3s
}

.case2 dl dt .swtbtn:after {
    content: "";
    width: 13px;
    height: 13px;
    display: inline-block;
    vertical-align: middle;
    margin-left: 20px;
    border: 3px solid #ffffff;
    border-radius: 50%;
    transition: all linear 0.3s
}

.case2 dl dt .swtbtn:hover {
    background-color: #3f80f8;
    background-image: linear-gradient(to right, #3f80f8, #2a60c1)
}

.case2 dl:first-child {
    margin-top: 0
}

.case2 dl:nth-child(even):before {
    -moz-transform: scaleX(-1);
    -webkit-transform: scaleX(-1);
    -o-transform: scaleX(-1);
    transform: scaleX(-1);
    filter: FlipH
}

.case2 dl:nth-child(even) dd {
    float: right
}

.case2 dl:nth-child(even) dt {
    left: 0;
    right: auto
}

@media (max-width: 1600px) {
    .case1 .wrap {
        padding-top: 146px;
        padding-bottom: 146px
    }

    .case1 .title {
        font-size: 43px
    }

    .case2 .wrap {
        padding-top: 70px;
        padding-bottom: 70px
    }

    .case2 dl {
        margin-top: 80px
    }

    .case2 dl dt h3 {
        font-size: 26px
    }

    .case2 dl dt .cs {
        margin-top: 35px
    }

    .case2 dl dt .cs p span {
        font-size: 28px
    }

    .case2 dl dt .cs p+p {
        margin-left: 11.04972%
    }
}

@media (max-width: 1440px) {
    .case1 .wrap {
        padding-top: 116px;
        padding-bottom: 116px
    }

    .case1 .title {
        font-size: 38px
    }

    .case1 .text {
        font-size: 16px
    }

    .case2 .wrap {
        padding-top: 60px;
        padding-bottom: 60px
    }

    .case2 dl {
        margin-top: 60px
    }

    .case2 dl dt {
        top: 20px;
        bottom: 20px
    }

    .case2 dl dt h3 {
        font-size: 24px
    }

    .case2 dl dt .text {
        margin-top: 18px;
        font-size: 16px
    }

    .case2 dl dt .cs {
        margin-top: 30px
    }

    .case2 dl dt .cs p {
        font-size: 16px
    }

    .case2 dl dt .cs p span {
        font-size: 26px
    }

    .case2 dl dt .swtbtn {
        width: 216px;
        margin-top: 120px;
        font-size: 18px
    }
}

@media (max-width: 1280px) {
    
    .case1 .wrap {
        padding-top: 86px;
        padding-bottom: 86px
    }

    .case1 .title {
        font-size: 33px
    }

    .case1 .text {
        font-size: 14px
    }

    .case2 .wrap {
        padding-top: 50px;
        padding-bottom: 50px
    }

    .case2 dl {
        margin-top: 40px
    }

    .case2 dl dt {
        top: 20px;
        bottom: 20px
    }

    .case2 dl dt h3 {
        font-size: 22px
    }

    .case2 dl dt .text {
        margin-top: 14px;
        font-size: 14px
    }

    .case2 dl dt .cs {
        margin-top: 23px
    }

    .case2 dl dt .cs p {
        font-size: 14px
    }

    .case2 dl dt .cs p span {
        font-size: 24px
    }

    .case2 dl dt .swtbtn {
        width: 196px;
        margin-top: 110px;
        font-size: 16px
    }
}