.case {
    margin-top: 150px;
    padding: 0 6.25%;
    overflow:hidden;
}
.title{
    display: flex;
    justify-content: space-between;
    flex-wrap:wrap
}
.part strong {
    font-size: 24px;
}
.part .part-title {
    font-size: 7.5rem;
    line-height: 1.15;
}
.com-idea-ch {
    margin-top: 50px;
    margin-bottom: 10px;
    line-height: 2;
    font-size: 1.4rem;
    font-weight: bold;
}
.com-idea-eng {
    font-size: 1rem;
    line-height: 2;
    margin-bottom: 50px;
}
.case-show {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}
.part-box {
    width: calc((100% - 60px)/3);
    margin-top: 30px;
    position: relative;
    overflow: hidden;
}
.part-box .case-box-img {
    overflow: hidden;
    line-height: 0;
}
.part-box img {
    width: 100%;
}
.case-content {
    position: absolute;
    bottom: 0;
    width: 100%;
    background: rgba(255,255,255,.9);
    left: 0;
    padding: 20px 25px;
    transform: translate3d(0,101%,0);
    transition: transform .6s cubic-bezier(.14,1,.34,1),opacity .4s cubic-bezier(.215,.61,.355,1);
}
.case-title {
    font-size: 1.4rem;
    transition-delay: .2s;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.case-title, .case-content > p {
    opacity: 0;
    transform: translate3d(25px,0,0);
    transition: transform .8s cubic-bezier(.14,1,.34,1),opacity .4s cubic-bezier(.215,.61,.355,1);
}
.case-show .part-box:hover .case-content, .case-show .part-box:hover .case-title, .case-show .part-box:hover .case-content > p {
    transform: translateZ(0);
    opacity: 1;
}

@media screen and (max-width:1260px) {
    .part-box {
        width: calc((100% - 60px) / 2);
        margin-top: 30px;
        position: relative;
        overflow: hidden;
    }
}
@media screen and (max-width:900px) {
    .part-box {
        width: 100%;
        margin-top: 30px;
        position: relative;
        overflow: hidden;
        margin-top: 30px
    }
    .case-show .part-box .case-content, .case-show .part-box .case-title, .case-show .part-box .case-content > p {
        transform: translateZ(0);
        opacity: 1;
    }
    .part .part-title{
        font-size:4rem
    }
    .case-content {
        padding: 10px 15px;
    }
    .com-idea-eng{font-size:.75rem}
}