.case-banner {
    width: 100%;
    height: 45vh;
    background-color: #ccc;
    overflow: hidden;
    background-image: url('/image/public/bg/bg11.png');
    background-size: cover;
    position: relative;
    z-index: 9;
}

.case-nav1 {
    -webkit-text-stroke: 1px #fff;
    -webkit-text-fill-color: transparent;
    position: absolute;
    font-size: 80px;
    font-weight: 800;
    text-align: center;
    bottom: -30px;
    z-index: 10;
    margin: auto;
    left: calc(50% - 160px);
    animation: fadeInLeft;
    animation-duration: 1.3s;
}

.case-nav2 {
    position: relative;
    font-size: 80px;
    font-weight: 800;
    text-align: center;
    padding: 0 0 30px 0;
    height: 5vh;
    box-shadow: 0px 5px 15px #ccc;

}

.case-nav2 span {
    position: absolute;
    top: -50px;
    left: calc(50% - 160px);
    animation: fadeInRight;
    animation-duration: 1.3s;
}

.case-main {
    width: 100%;
    background-color: aliceblue;
    padding: 5vh 0;
}

.case-view{
    width: 75vw;
    margin: auto;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-content: flex-start;
}

.case-view-item{
    width: 30%;
    height: 15vw;
    margin: 1.9% 1.6%;
    background-color: #fff;
    position: relative;
    overflow: hidden;
    animation: fadeInUpBig;
    animation-duration: 0.9s;
}

.cvi-img{
    width: 100%;
    height: 100%;
}

.cvi-img img{
    width: 100%;
    height: 100%;
}

.cvi-txt{
    width: 100%;
    height: 100%;
    background-color: #000000a8;
    position: absolute;
    bottom: -80%;
    transition: all .8s;
}
.cvi-txt-title{
    color: #fff;
    font-size: 1.4vw;
    padding-left: 1vw;
    padding-top: .8vw;
}

.case-view-item:hover .cvi-txt{
    bottom: 0;

}