body {
    background-color: #ffffff;
}
.product-list {
    width: 100%;
    height: 700px;
    background-size: cover;
    margin: 50px 0;
}
.case-list {
    display: flex;
    flex-wrap: wrap;
    margin-bottom: 50px;
    justify-content: space-around;
}
.case-list > .case-item {
    width: 24%;
    height: 280px;
    background-size: cover;
    margin-bottom: 10px;
}
.case-list > .case-item > div {
    width: 100%;
    height: 100%;
    font-size: 36px;
    color: #FFFFFF;
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(99,96,96,0.8);
}