.img-box img {
    /*width: 200px;*/
    height: auto;
    transition: all 0.4s;
}

.img-box .tit {
    font-size: 20px;
    color: #405148;
    margin-top:15px;
}

.img-box .tips {
    font-size: 16px;
    text-align: center;
}

@media screen and (max-width:1000px) {
    .bb {
        flex-direction: column;
        align-items: center;
    }
    .img-box {
        margin-top: 10px;
    }
}

.img-box:hover img {
    transform: scale(1.1);
}

@media screen and (max-width:1920) {
.img-box .tips {
    font-size: 18px;
}
}