.content {
    width: 1200px;
    z-index: 9;
    font-size: 14px;
}

.mid {
    width: 1200px;
    display: flex;
    flex-wrap: wrap;
    flex-direction: row;
    justify-content: flex-start;
}

.box {
    width: 23%;
    background: #dcdcdc;
    margin-bottom: 20px;
    margin-right: 22px;
}

.box img {
    width: 100%;
    height: 170px;
}

.box div {
    width: 100%;
    height: 46px;
    font-size: 16px;
    color: #333;
    text-align: center;
    line-height: 44px;
}