body {
    background: whitesmoke;
}

.big-logo-box {
    margin-top: 80px;
}

.big-logo-box img {
    display: block;
    width: 100%;
}

.tab-box {
    position: sticky;
    top: 77px;
    z-index: 5;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
}

.tab-box .tab-item {
    margin: 0 20px;
    padding: 15px 10px 10px 10px;
    color: #333;
    cursor: pointer;
    border-bottom: 4px solid white;
}

.tab-item.active {
    color: #029898;
    font-size: 16px;
    border-bottom: 4px solid #029898;
    border-radius: 2px 2px 2px 2px;
}

.list-box {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    width: 75vw;
    min-height: 30vw;
    margin: 30px auto;
}

.item-box {
    position: relative;
    margin: 10px;
    width: calc(25vw - 80px);
    height: calc(25vw - 80px);
    padding: 30px;
    color: #333;
    background: white;
    border-radius: 10px;
    text-decoration: none;
    transition: background-color .5s ease-in-out, color 0.5s ease-in-out;
}

.item-box:hover {
    color: white;
    background: #029898;
    box-shadow: 10px 10px 19px 0 #02989850;
}

.item-box .date {
    position: relative;
    font-size: 46px;
}

.item-box .year {
    position: relative;
    font-size: 16px;
}

.item-box .title {
    position: absolute;
    left: 30px;
    bottom: 50px;
    right: 30px;
    margin-top: 20px;
    font-size: 16px;
    line-height: 1.5em;
    height: 4.5em;
    overflow: hidden;
}

.item-box .img-box {
    position: absolute;
    left: 0px;
    top: 0px;
    right: 0px;
    bottom: 0px;
    z-index: 0;
    border-radius: 10px;
    overflow: hidden;
    transform: scale(1);
    opacity: 0;
    transition: opacity .5s ease-in-out, transform .5s ease-in-out;
}

.item-box .img-box img {
    width: 100%;
    height: 100%;
}

.item-box:hover .img-box {
    opacity: 1;
    transform: scale(1);
}

@media (max-width: 768px) {
    .big-logo-box {
        margin-top: 57px;
    }

    .tab-box {
        top: 57px;
    }

    .list-box {
        margin: 10px auto;
        width: 100%;
    }

    .item-box {
        width: calc(50vw - 80px);
        height: calc(50vw - 80px);
    }

    .item-box .title {
        bottom: 25px;
        font-size: 12px;
    }
    
    .item-box .date {
        font-size: 23px;
    }
    
    .item-box .year {
        font-size: 12px;
    }
}