.material {
    padding-top: 60px;
    padding-bottom: 20px;
    display: flex;
    flex-wrap: wrap;
}

.material li {
    width: 23.5%;
    margin-right: 2%;
    margin-bottom: 100px;
}

.material li:nth-child(4n) {
    margin-right: 0px;
}

.material div {
    width: 100%;
    padding-top: 66.6%;
    position: relative;
    overflow: hidden;
}

.material img {
    position: absolute;
    top: 0px;
    left: 0px;
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    -webkit-transition: all 0.3s;
    -moz-transition: all 0.3s;
    -o-transition: all 0.3s;
    transition: all 0.3s;
}

.material p {
    margin-top: 20px;
    color: #333;
}

.material li:hover img {
    transform: scale(1.05);
    -webkit-transition: all 0.3s;
    -moz-transition: all 0.3s;
    -o-transition: all 0.3s;
    transition: all 0.3s;
}

.material li:hover p {
    color: #1751A2;
}




/* 适配 */
@media (max-width: 1280px) {
    .material li {
        margin-bottom: 70px;
    }
}

@media (max-width: 992px) {
    .material li {
        margin-bottom: 50px;
    }
}

@media (max-width: 767px) {
    .material li {
        width: 48%;
        margin-right: 4%;
        margin-bottom: 30px;
    }

    .material li:nth-child(even) {
        margin-right: 0px;
    }

    .material {
        padding-top: 40px;
    }
}