.main {
    padding: 40px 0;
}

.main_h {
    font-size: 30px;
    color: #000;
    text-align: center;
}

.main_h_lower_line {
    display: block;
    width: 160px;
    margin: 10px auto 20px;
    border-top: 1px solid #000;
}

.main_p {
    text-align: center;
    font-size: 18px;
}

.main_list {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    margin: 30px 0;
}

.main_list_item {
    position: relative;
    width: 283px;
    height: 340px;
    margin-bottom: 20px;
}

.main_item_img img {
    width: 100%;
    max-height: 100%;
}

.main_list_item:hover .main_item_mantle {
    display: block;
}

.main_item_mantle {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, .4);
}

.main_item_mantle_h {
    margin-top: 80px;
    text-align: center;
    font-size: 20px;
    color: #fff;
}

.main_item_mantle_p {
    margin-top: 45px;
    text-align: center;
    font-size: 18px;
    color: #fff;
}

.main_item_mantle_link {
    margin: 0 auto;
    margin-top: 30px;
    display: block;
    width: 130px;
    text-align: center;
    height: 40px;
    line-height: 40px;
    border-radius: 40px;
    background-color: #605E5E;
    color: #fff;
}

.main_item_mantle_link:hover {
    background-color: #fff;
    color: #605E5E;
}

.main3_item {
    width: 235px;
    height: 235px;
}

.main3_item_img img {
    width: 100%;
    max-height: 100%;
}

.main3_item_mantle_p a {
    display: block;
    margin: 85px auto;
    width: 175px;
    text-align: center;
    font-size: 15px;
    color: #fff;
}

.main4_item {
    width: 185px;
    height: 185px;
    margin-bottom: 15px;
}

.main4_item_img img {
    width: 100%;
    max-height: 100%;
}

.main4_mantle {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, .1);
    z-index: -1;
}

.main4_item:hover .main4_mantle {
    display: block;
}


@media (max-width:969px) {
    .main_list {
        justify-content: space-around;
    }

    .main_list_item {
        width: 45%;
        height: auto;
        margin-bottom: .4rem;
    }

    .main_item_mantle {
        padding: .1rem 0;
    }

    .main_item_mantle_h,
    .main_item_mantle_p {
        margin-top: .2rem;
        font-size: .14rem;
    }

    .main_item_mantle_link {
        width: 1rem;
        height: .3rem;
        line-height: .3rem;
        margin-top: .2rem;
    }

    .main_list {
        margin-bottom: 0;
    }

    .main {
        padding: .2rem 0 0 0;
    }

    .main_h,
    .main_p {
        font-size: .16rem;
    }

    .main3_item_mantle_p a {
        width: 100%;
        height: 100%;
        margin: .5rem 0;
    }
}