.banner {
    width: 100%;
    min-width: 1200px;
    height: 570px;
    background-color: #72c69e;
    text-align: center;
    padding-top: 150px;
    box-sizing: border-box;
    color: #fff
}

.bannerText1 {
    font-size: 45px;
    font-weight: 700;
    letter-spacing: 10px
}

.bannerText2 {
    font-size: 45px;
    letter-spacing: 10px
}

.bannerText3 {
    padding-top: 45px;
    font-size: 26px;
    letter-spacing: 10px
}

.bannerText3 span {
    font-weight: 700
}

.bannerText4 {
    font-size: 26px;
    letter-spacing: 10px
}

.case {
    margin-top: 20px;
    width: 1200px;
    margin: 0 auto
}

.caseNav {
    padding: 40px 0;
    display: flex;
    justify-content: center;
}

.caseNav>div {
    margin-left: 70px;
    color: #c9caca
}

.caseImg {
    display: flex;
    flex-wrap: wrap
}

.caseImg a {
    width: 400px;
    height: 400px;
    overflow: hidden
}

.caseImg img {
    width: 400px;
    height: 400px;
    transition: all .5s
}

.caseImg img:hover {
    transform: scale(1.1)
}

.caseBtn {
    margin: 50px auto;
    width: 145px;
    height: 45px;
    border: 1px solid #e4e5e5;
    color: #999;
    text-align: center;
    line-height: 45px;
    font-size: 17px;
    cursor: pointer
}

.caseNavItemActive {
    color: #72c69e!important
}

.indexItem {
    display: none
}

.isShow {
    display: block
}

.indexcaseNavItem {
    cursor: pointer
}

.caseImg a {
    position: relative;
}

.mask {
    display: none;
}

.maskShow {
    display: block;
}

.maskCont {
    width: 400px;
    height: 400px;
    background-color: #333;
    position: absolute;
    left: 0;
    top: 0;
    opacity: .5;
    color: #fff;
    padding: 30px;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.maskTitle {
    font-size: 28px;
    position: relative;
}

.maskTitle::after {
    content: "";
    width: 80px;
    height: 3px;
    background-color: #fff;
    position: absolute;
    bottom: -15px;
    left: 0;
}

.maskTextTitle {
    font-size: 24px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.maskTextCont {
    font-size: 14px;
    margin-top: 5px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}