.m_container {
    width: 1280px;
    margin: auto;
    padding-bottom: 120px;
}

.m_container .content {
    font-size: 0;
}

.m_container .content ul {
    margin: 0;
    padding: 0;
    display: flex;
    /* justify-content: flex-start; */
    flex-wrap: wrap;
}

.recommend_ok {
    width: fit-content;
    background-color: #FFA608;
    color: white;
    display: flex;
    align-items: center;
    height: fit-content;
    border-radius: 5px;
    font-size: 13px;
    padding-left: 6px;
    padding-right: 6px;
    margin-left: 3px;
}

.m_container .content .b_li {
    display: inline-block;
    perspective: 500px;
    max-width: 346px;
    min-height: 380px;
    margin-left: 20px;
    margin-bottom: 20px;
}

.content .b_li_first {
    margin-left: 0;
}

.content .b_li_bottom {
    /* margin-top: 20px; */
}



.b_item {
    height: 100%;
    width: 100%;
    background-color: #E0F3FF;
    padding: 30px;
    position: relative;
    border-radius: 4px;
    transform-origin: 10% 10%;
    transition: all .2s linear;
}

.b_item .b_item_link {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    cursor: pointer;
    z-index: 100;
}

.b_item:hover {
    transform: rotate3d(0, 1, 0, -3deg);
    box-shadow: 0 5px 20px 0 rgba(198, 211, 220, 0.14);
}

.b_item_bottom:hover {
    transform: rotate3d(0, 1, 0, -2deg);
}

.b_item:hover .b_item_btn {
    display: block;
}

.b_item .title {
    margin: 0;
    font-size: 26px;
    line-height: 40px;
    color: #1A2736;
}

.b_item .title a {
    display: inline-block;
    float: right;
    height: 34px;
    width: 34px;
    cursor: pointer;
    position: absolute;
    right: 30px;
    z-index: 101;
}

.b_item .describe {
    display: block;
    margin: 0;
    font-size: 16px;
    line-height: 30px;
    text-align: justify;
    color: #37475A;
    margin-top: 10px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 6;
    -webkit-box-orient: vertical;
}

.b_item_btn {
    display: none;
    position: absolute;
    left: 0;
    bottom: 0;
    height: 50px;
    padding-left: 30px;
}

.b_item_btn:hover img {
    margin-left: 10px;
}

.b_item_btn img {
    vertical-align: top;
    margin-left: 5px;
    transition: margin-left .2s ease-in;
    -moz-transition: margin-left .2s ease-in;
    -webkit-transition: margin-left .2s ease-in;
    -o-transition: margin-left .2s ease-in;
}

.b_item_btn span {
    margin: 0;
    font-size: 14px;
    line-height: 20px;
    color: #007FDF;
}

.b_item_pic {
    position: absolute;
    right: 30px;
    bottom: 30px;
    z-index: 99;
}

@media screen and (max-width: 1408px) {}

@media screen and (max-width: 1280px) {
    .m_container {
        width: 80%;
        height: auto;
    }

    .m_container .content ul {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-evenly;
        margin-top: -20px;
    }

    .m_container .content ul .clear {
        display: none;
    }

    .m_container .content ul li {
        margin-left: 0 !important;
        margin-right: 0 !important;
        width: calc(50% - 10px) !important;
        margin-top: 20px;
    }

    .b_item .describe {
        -webkit-line-clamp: 4;
    }
}

@media screen and (max-width: 1024px) {
    .content ul .b_li {
        perspective: 900px;
    }
}

@media screen and (max-width: 880px) {
    .m_container .content ul {
        justify-content: center;
    }

    .m_container .content ul li {
        width: 80% !important;
    }
}

@media screen and (max-width: 620px) {
    .m_container .content ul li {
        width: 100% !important;
    }
}

@media screen and (max-width: 480px) {
    .b_item .title {
        font-size: 24px;
    }

    .b_item .describe {
        font-size: 14px;
    }
}