.box7_list_item_content_title {
    font-size: 20px;
    font-weight: bold;
    text-align: left;
    margin: 0 auto;
    display: inline-block;
}

.box7_list_item_content {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 150px;
    background: linear-gradient(#0000 0%, #000000e6 100%);
    padding: 15px 15px 25px 20px;
    color: #fff;
}

.box7_list_item:hover .box7_list_item_content_title {
    text-decoration: underline;
}

.topic_item_type {
    position: absolute;
    top: 15px;
    right: 18px;
    width: 80px;
    height: 35px;
    border-radius: 0px 20px 0px 20px;
    background: rgba(0, 0, 0, 0.3);
    font-size: 16px;
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
}

.box7 {
    overflow: hidden;
    display: flex;
    margin: 0;
}

.box7_list {
    margin: 0 20px;
    overflow: hidden;
    padding-top: 40px;
}

.box7_list_move {
    display: flex;
    transition: 0.2s linear all;
    width: fit-content;
}

.box7_prev {
    line-height: 457px;
}

.box7_prev i {
    font-size: 32px;
    color: #1b5478;
}

.box7_next {
    line-height: 457px;
}

.box7_next i {
    font-size: 32px;
    color: #1b5478;
}

.box7_list_item {
    flex-shrink: 0;
    width: 236px;
    height: 363px;
    margin-left: 28px;
    position: relative;
    cursor: pointer;
    transition: 0.2s linear all;
    box-shadow: 0px 5px 21px 0px rgba(0, 0, 0, 0.14);
    border-radius: 10px;
    overflow: hidden;

}

.box7_list_item:first-child {
    margin-left: 0;
}

.box7_list_item_image {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
}

.box7_list_item_name {
    position: absolute;
    bottom: 50px;
    left: 30px;
    font-size: 32px;
    color: white;
}

.box7_list_item_icon {
    position: absolute;
    top: 0;
    left: 0;
    transform: translate(50%, 100%);
}

.index_ebook {
    padding: 50px 0 75px 0;
}

.box5 {
    overflow: hidden;
    display: flex;
    margin: 40px 0 0 0;
}

.box5_list {
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-evenly;
}

.box5_list_item {
    position: relative;
    padding-top: 50px;
    transition: 0.2s linear all;
}

.box5_list_item_image {
    display: block;
    position: absolute;
    transition: 0.2s linear all;
    border-radius: 10px;
    overflow: hidden;
    transform: translateY(-2px);
    cursor: pointer;
    width: 216px;
    height: 290px;
}

.box5_list_item_info {
    display: flex;
    transition: 0.2s linear all;
    border-radius: 10px;
    overflow: hidden;
    background: linear-gradient(to bottom left, #D7E3F3, #EDFAFF);
}

.box5_list_item_info_content {
    padding: 10px 20px 10px 25px;
    box-sizing: border-box;
    width: 215px;
    height: 290px;
    display: flex;
    flex-direction: column;
    align-content: center;
    justify-content: center;
    text-align: left;

}

.box5_list_item_info_content_name {
    font-weight: bold;
    font-size: 22px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.box5_list_item_info_content_description {
    line-height: 1.8em;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
}

.box5_list_item_info_expand {
    height: 0;
    width: 0;
    transition: 0.2s linear all;
}

.box5_list_item:hover .box5_list_item_info_expand {
    width: 215px;
}

.box5_list_item:hover .box5_list_item_image {
    transform: translateY(-50px);
    box-shadow: 5px 5px 5px rgba(0, 0, 0, .2);
}

.box5_list_item_info_content_datetime {
    color: #225E8B;
    margin: 20px 0;
}


/* 第六个盒子 */
.index_database {
    background-color: rgb(240, 243, 251);
    padding: 50px 0 75px 0;
}

.box6 {
    overflow: hidden;
    display: flex;
    margin: 40px 35px 0 0;
}

.box6_list {
    display: flex;

}

.box6_list_item {
    position: relative;
    width: 278px;
    height: 585px;
    cursor: pointer;
}

.box6_list_item_image {
    position: absolute;
    left: 0;
    top: 0;
}

.box6_list_item_name {
    position: absolute;
    color: white;
    font-size: 28px;
    writing-mode: vertical-rl;
    transform: translate(100%, 60px);
}

/* 第四个盒子 */
.index_image {
    padding: 50px 0 75px 0;
}

.box4 {
    overflow: hidden;
    display: flex;
    margin: 40px 0px 0 0;
}

.box4_list {
    margin: 0 20px;
    overflow: hidden;
}

.box4_list_move {
    display: flex;
    transition: 0.2s linear all;
    width: fit-content;
}

.box4_prev {
    line-height: 457px;
}

.box4_prev i {
    font-size: 32px;
    color: #1b5478;
}

.box4_next {
    line-height: 457px;
}

.box4_next i {
    font-size: 32px;
    color: #1b5478;
}

.box4_list_item {
    flex-shrink: 0;
    width: 236px;
    height: 457px;
    margin-left: 28px;
    position: relative;
    cursor: pointer;
    transition: 0.2s linear all;
}

.box4_list_item:hover {
    transform: translateY(-10px);
}

.box4_list_item:first-child {
    margin-left: 0;
}

.box4_list_item_image {
    position: absolute;
    left: 0;
    top: 0;
}

.box4_list_item_name {
    position: absolute;
    bottom: 50px;
    left: 30px;
    font-size: 32px;
    color: white;
}

.box4_list_item_icon {
    position: absolute;
    top: 0;
    left: 0;
    transform: translate(50%, 100%);
}



/* 第三个盒子 */
.index_textbook {
    position: relative;
    padding: 50px 0 0 0;
    margin-bottom: 75px;

}

.background {
    position: absolute;
    background-color: rgb(241, 244, 251);
    width: 100%;
    height: 35%;
    bottom: 0;
}

.box3 {
    position: relative;
    width: 100%;
    margin: 40px 35px 0 0;
}

.box3_list {
    display: flex;
}

.box3_list_item {
    width: 33%;
    padding: 50px 0;
    position: relative;
    margin: 5% 5%;
    background: white;
    box-shadow: 0 0 10px rgba(0, 0, 0, .2);
    cursor: pointer;
}

.box3_list_item:nth-child(2) {
    margin: 5% 0 !important;
}

.box3_list_item_name {
    color: black;
    font-weight: bold;
    margin-top: 10px;
    font-size: 24px;
}


/* 第二个盒子 */
.index_course {
    padding: 50px 0 75px 0;
}

.box2 {
    width: fit-content;
    margin: 40px 0 0 0;
    position: relative;
    background: url("../../img/数字课程-背景.jpg") no-repeat;
    background-size: 100% 50%;
}

.box2_list {
    display: flex;
    padding: 40px 10px 0 10px;
}

.box2_List_item {
    width: 226px;
    height: 307px;
    box-sizing: border-box;
    /* padding: 25px; */
    display: flex;
    margin: 0 25px;
    flex-direction: column;
    justify-content: center;
    cursor: pointer;
    transition: 0.2s linear all;
}

.box2_List_item_image {
    border-radius: 10px;
    width: 226px;
    height: 307px;
    flex-shrink: 0;
}

.box2_List_item:hover {
    transform: translateY(-10px);

}

.box2_List_item_name {
    font-weight: bold;
    margin-top: 20px;
    font-size: 18px;
}

/* 第一个盒子 */
.index_audio {
    padding: 50px 0 75px 0;
}

.box1 {
    margin: 40px 0 0 0;
}

.box1_list {
    display: flex;
    padding: 30px 16px;
    background-color: white;
    width: fit-content;
    height: fit-content;
}

.box1_list_item {
    position: relative;
    margin: 0 9px;
    width: 256px;
    height: 273px;
    line-height: 0;
    cursor: pointer;
}

.box1_list_item img {
    width: 100%;
    height: 100%;
}

.box1_list_item_name {
    position: absolute;
    bottom: 0;
    width: 100%;
    background-color: rgba(207, 208, 208, .8);
    box-sizing: border-box;
    text-align: center;
    padding: 30px 0;
    font-weight: bold;
    transition: 0.2s linear all;
    font-size: 18px;
}

.box1_list_item_iconBox {
    background-color: rgb(208, 158, 19);
    width: 46px;
    height: 46px;
    padding: 12px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto;
    transform: translateY(-50%);
    opacity: 0;
    transition: 0.2s linear all;
}

.box1_list_item--active:hover .box1_list_item_name {
    background-color: rgba(208, 158, 19, .8) !important;
    padding: 49px 0 !important;
}

.box1_list_item--active:hover .box1_list_item_iconBox {
    opacity: 1;
}


/* ----------------------- */



.index .swiper-container {
    width: 100%;
    height: 593px;
    position: relative;
}

.index .swiper-container .el-carousel {
    height: 100%;
}

.index .swiper-container .el-carousel .el-carousel__arrow {
    background: none;
}

.index .swiper-container .el-carousel .el-carousel__arrow i {
    font-size: 31px;
    color: #ffffff;
    font-weight: bold;
}

.index .swiper-container .el-carousel .el-carousel__arrow--left {
    left: 200px;
}

.index .swiper-container .el-carousel .el-carousel__arrow--right {
    right: 200px;
}

.index .swiper-container .el-carousel .el-carousel__container {
    height: 100%;
}

.index .swiper-container .el-carousel .el-carousel__indicator .el-carousel__button {
    width: 14px;
    height: 14px;
    background: rgba(0, 0, 0, .8);
    border: solid 1px #142b6e;
    border-radius: 50%;
}

.index .swiper-container .el-carousel .el-carousel__indicator.is-active .el-carousel__button {
    background-color: #ffffff;
    border: solid 1px #142b6e;
}

.index .swiper-container .index_notice {
    background: url(../../img/飘窗1.png) no-repeat center center;
    background-size: 100% 100%;
    width: 178px;
    height: 174px;
    position: absolute;
    right: 37px;
    bottom: 50px;
}

.index .swiper-container .index_notice .close_icon {
    position: absolute;
    right: 10px;
    top: 60px;
    cursor: pointer;
    color: #fff;
}

.index .swiper-container .index_notice .close_icon:hover {
    font-weight: bold;
}

.index .swiper-container .index_notice .title {
    font-size: 18px;
    color: #fff;
    font-weight: bold;
    text-align: center;
    position: absolute;
    bottom: 75px;
    left: 52%;
    transform: translateX(-50%);
    width: 100%;
}

.index .swiper-container .index_notice .p {
    font-size: 16px;
    color: #fff;
    text-align: center;
    position: absolute;
    bottom: 42px;
    left: 52%;
    transform: translateX(-50%);
    width: 100%;
}

.index .swiper-container .index_notice .btn {
    width: 104px;
    height: 30px;
    background-image: linear-gradient(90deg, #000000 0%, #102199 100%);
    border-radius: 14px;
    color: #fff;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: -8px;
}

.index .swiper-container .index_notice .btn:hover {
    cursor: pointer;
    background-image: linear-gradient(90deg, #102199 0%, #000000 100%);
}

.index .swiper-container .content {
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.index .swiper-container .content img {
    width: 100%;
    height: 100%;
}

.index_recommended {
    /**background: url(/imgresize/resize?width=192&height=732&url=http://123.56.198.225/static/assets/img/recommended_bg.png) no-repeat center -550px;**/
    background: url(../../img/recommended_bg.png) no-repeat center -550px;
    background-color: #F1F4FB;
    padding: 38px 0 75px 0;
}

.index_recommended .count_sec {
    height: 160px;
    background-color: #ffffff;
    border-radius: 10px;
    align-items: center;
    display: flex;
    opacity: 0;
}

.index_recommended .count_sec .count_sec_item {
    width: 170px;
    text-align: center;
    position: relative;
    cursor: pointer;
}

.index_recommended .count_sec .count_sec_item::after {
    position: absolute;
    content: '';
    width: 1px;
    height: 49px;
    background-image: linear-gradient(0deg,
            #00ccff 0%,
            #0147d7 100%);
    right: 0;
    top: 60%;
    transform: translateY(-50%);
    opacity: 0.2;
}

.index_recommended .count_sec .count_sec_item:first-child {
    width: 196px;
}

.index_recommended .count_sec .count_sec_item:last-child::after {
    display: none;
}

.index_recommended .count_sec .count_sec_item .num {
    font-size: 40px;
    color: #002e62;
    font-family: system-ui;
    letter-spacing: -1px;
}

.index_recommended .count_sec .count_sec_item .num span {
    color: #494949;
    font-size: 16px;
}

.index_recommended .count_sec .count_sec_item .count_text {
    font-size: 16px;
    color: #494949;
    margin-top: 10px;
}

.index_recommended .index_input {
    width: 1237px;
    margin: 50px auto 50px;
    margin-left: 115px;
}

.index_recommended .index_input .search-input {
    margin: 0 0 25px 0;
}

.index_recommended .search-input .el-input__wrapper {
    border-radius: 10px;
    box-shadow: 0px 0px 30px 8px rgba(1, 50, 140, 0.08);
}

.index_recommended .search-input .el-input__inner {
    height: 60px;
    border-radius: 30px;
    padding: 0 240px 0 126px;
    font-size: 16px;
}

.index_recommended .search-input .el-input__suffix {
    position: relative;
    right: 240px;
}

.index_recommended .search-input .el-input-group__prepend {
    background: #fff !important;
    position: absolute;
    box-shadow: none;
    left: 5px;
    top: 0;
    z-index: 9;
}

.index_recommended .search-input .el-input-group__prepend .el-dropdown-link {
    width: 80px;
    display: flex;
    justify-content: space-between;
    font-size: 16px;
    color: #1a5378;
    cursor: pointer;
}

.index_recommended .search-input .el-input-group__append {
    background: none;
    position: relative;
    box-shadow: none;
}

.index_recommended .search-input .ai-btn {
    position: absolute;
    right: 232px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #531ca3;
    font-size: 16px;
    width: 110px;
    height: 50px;
    background-image: linear-gradient(90deg,
            rgba(118, 131, 217, .2) 0%,
            rgba(216, 160, 254, .2) 100%);
    border-radius: 6px;
    cursor: pointer;
}

.index_recommended .search-input .ai-btn i {
    font-size: 28px;
    color: linear-gradient(0deg,
            #9929ea 0%,
            #1908fb 100%);
    margin-left: -5px;
}

.index_recommended .search-input .ai-btn span {
    font-weight: bold;
}

.index_recommended .search-input .ai-btn:hover {
    opacity: 0.8;
}

.index_recommended .search-input .search-btn {
    position: absolute;
    right: 115px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 16px;
    width: 110px;
    height: 50px;
    background-image: linear-gradient(90deg,
            #1c5579 0%,
            #002e62 100%);
    border-radius: 6px;
    cursor: pointer;
}

.index_recommended .search-input .search-btn .i {
    font-size: 18px;
}

.index_recommended .search-input .search-btn span {
    padding: 0 0 0 8px;
}

.index_recommended .search-input .search-btn:hover {
    opacity: 0.8;
}

.index_recommended .search-input .advance-btn {
    color: #003063;
    font-size: 16px;
    cursor: pointer;
    text-decoration: underline;
}

.index_recommended .search-input .advance-btn:hover {
    font-weight: bold;
}

.index_recommended .hot-search {
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    padding: 0 0 0 10px;
}

.index_recommended .hot-search label {
    font-size: 16px;
    color: #1b5478;
    font-weight: bold;
}

.index_recommended .hot-search .hot-search-list {
    flex: 1;
    display: flex;
    flex-wrap: wrap;
    color: #2d3f4a;
    font-size: 16px;

}

.index_recommended .hot-search .hot-search-list .hot-search-item {
    font-size: 16px;
    margin: 0 8px;
    cursor: pointer;
}

.index_recommended .hot-search .hot-search-list .hot-search-item:hover {
    color: #1b5478;
    text-decoration: underline;
}

.index_title {
    position: relative;
    text-align: center;
}

.index_title::after {
    content: '';
    position: absolute;
    top: 53px;
    left: 50%;
    transform: translateX(-50%);
    width: 22px;
    height: 3px;
    background-image: linear-gradient(#0f8adb,
            #0f8adb),
        linear-gradient(#42d3ff,
            #42d3ff);
    background-blend-mode: normal,
        normal;
    border-radius: 2px;
    box-shadow: 0px 0px 5px 0px #42d3ff;
}

.index_title .index_title_zh {
    font-size: 30px;
    color: #000000;
    border-bottom: 1px solid #e0e0e0;
    padding-bottom: 10px;
}

.index_title .index_title_en {
    font-size: 18px;
    color: #a7a7a7;
    font-weight: 100;
    margin-top: 5px;
}

.index_title .index_title_zh span,
.index_title .index_title_en span {
    cursor: pointer;
}

.index_recommended_tab {
    height: 72px;
    background: #fff;
    border-radius: 40px 0px 0px 0px;
    display: flex;
    align-items: center;
    margin: 40px 0 42px 0;
}

.index_recommended_tab_item {
    width: 25%;
    height: 72px;
    border-radius: 40px 0px 0px 0px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    font-size: 20px;
    color: #000000;
}

.index_recommended_tab_item.active {
    height: 92px;
    background: url(../../img/commind.png) no-repeat center center;
    color: #ffffff;
    background-size: 100% 100%;
}

.index_recommended_tab_item img {
    width: 33px;
    margin: 0 38px 0 0;
}

.index_recommended_list {
    display: flex;
    /* height: 465px; */
    align-items: flex-start;
    position: relative;
}

.index_recommended_list_l {
    width: 361px;
    height: 339px;
    background-image: linear-gradient(0deg,
            #1c5579 0%,
            #002e62 100%);
    border-radius: 0px 0px 60px 0;
    display: flex;
    justify-content: center;
    align-items: end;
    color: #ffffff;
    font-size: 18px;
    margin: 126px 0 0 20px;
    padding: 0 0 20px 0;
    cursor: pointer;
}

.index_recommended_list_l:hover p {
    text-decoration: underline;
}

.index_recommended_list_l .img {
    width: 368px;
    height: 369px;
    position: absolute;
    left: 0;
    top: 0;
    background: #F1F4FB;
    display: flex;
    justify-content: center;
    align-items: center;
}

.index_recommended_list_l .img img {
    /* width: 100%; */
    height: 100%;
    max-width: 100%;
}

.index_recommended_list_l .recommended_txt {
    padding: 0 20px;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 55px;
    margin: 0 auto;
}

.index_recommended_list_l .recommended_txt p {
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.index_recommended_list_l .icon {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 0 0 20px 0;
    width: 48px;
    height: 48px;
    display: flex;
    justify-content: center;
    align-items: center;
    position: absolute;
    top: 0;
    left: 0;
}

.index_recommended_list_l .video_icon {
    z-index: 1;
    width: 50px;
    position: absolute;
    top: 159px;
    left: 159px;
}

.index_recommended_list_l .icon img {
    /* width: 32px; */
}

.index_recommended_list_l.video_item .img img {
    /* height: 270px; */
}

.index_recommended_list_l.book_item .img img {
    /* width: 270px; */
}

.index_recommended_list_r {
    flex: 1;
    display: flex;
    flex-wrap: wrap;
    margin: 0 0 0 37px;
}

.index_recommended_list_r .recommended_item {
    width: 220px;
    height: 220px;
    background-color: #F1F4FB;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    margin: 0 34px 25px 0;
    cursor: pointer;
}

.index_recommended_list_r .recommended_item:hover .title {
    text-decoration: underline;
}

.index_recommended_list_r .recommended_item:nth-child(4n) {
    margin: 0 0 25px 0;
}

.index_recommended_list_r .recommended_item .recommended_cover {
    /* width: 100%; */
    height: 100%;
}

.index_recommended_list_r .recommended_item .recommended_cover img {
    width: 100%;
    height: 100%;
}

.index_recommended_list_r .recommended_item .title {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 45px;
    background: rgba(0, 0, 0, 0.5);
    z-index: 9;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    padding: 0 10px;
}

.index_recommended_list_r .recommended_item .icon {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 0 0 20px 0;
    width: 48px;
    height: 48px;
    display: flex;
    justify-content: center;
    align-items: center;
    position: absolute;
    top: 0;
    left: 0;
}

.index_recommended_list_r .recommended_item .icon img {
    /* width: 32px; */
}

.index_recommended_list_r .recommended_item .video_icon {
    z-index: 1;
    width: 40px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.index_recommended_list_r .recommended_item.video_item .recommended_cover {
    /* height: 150px; */
}

.index_recommended_list_r .recommended_item.book_item .recommended_cover {
    /* width: 160px; */
}

.index_book {
    padding: 50px 0 75px 0;
}

.index_book_list {
    display: flex;
    align-items: center;
    position: relative;
    margin: 40px 35px 0 35px;
}

.index_book_list .prev_btn,
.index_book_list .next_btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    color: #9ea079;
    cursor: pointer;
}

.index_book_list .prev_btn {
    left: -40px;
}

.index_book_list .next_btn {
    right: -40px;
}

.index_book_list .prev_btn i,
.index_book_list .next_btn i {
    font-size: 32px;
    color: #9ea079;
    cursor: pointer;
}

.index_book_list .book_list_container {
    width: 100%;
    height: 360px;
    overflow: hidden;
    position: relative;
}

.index_book_list .book_list_wrapper {
    display: flex;
    margin-left: 0;
    width: 100%;
}

.index_book_list .book_list_item {
    width: 248px;
    height: 360px;
    margin: 0 10px;
    flex-shrink: 0;
    position: relative;
    display: flex;
    align-items: end;
}

.index_book_list .book_list_item_img {
    width: 147px;
    height: 220px;
    border-radius: 3px;
    overflow: hidden;
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    cursor: pointer;
}

.index_book_list .book_list_item_img img {
    width: 100%;
    height: 100%;
}

.index_book_list .book_list_item_content {
    width: 100%;
}

.index_book_list .book_list_item_content .round {
    width: 100%;
    height: 124px;
    background-color: #e8eae5;
    border-radius: 123px 123px 0px 0px;
}

.index_book_list .book_list_item_content .content {
    width: 100%;
    height: 110px;
    border: solid 2px #DFE6E5;
    border-top: none;
    padding: 15px 18px;
}

.index_book_list .book_list_item_content .content .name {
    color: #193a59;
    font-size: 16px;
    font-weight: bold;
}

.index_book_list .book_list_item_content .content .name span:hover {
    cursor: pointer;
    text-decoration: underline;
}

.index_book_list .book_list_item_content .content .desc {
    color: #43484b;
    line-height: 1.6em;
    margin: 10px 0 0 0;
}

.index_book_list .book_list_item:nth-child(2n) .round {
    background-color: #ebecf3 !important;
}

.index_book_list .book_list_item:nth-child(3n) .round {
    background-color: #ebf5f5 !important;
}

.index_book_list .book_list_item:nth-child(4n) .round {
    background-color: #eae8e5 !important;
}

.index_book_list .book_list_item:nth-child(5n) .round {
    background-color: #e6eae5 !important;
}

.index_topic {
    padding: 50px 0 75px 0;
}

.index_topic .topic_list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    margin: 30px -45px 0 -45px;
}

.index_topic .topic_list .topic_item {
    width: 254px;
    height: 385px;
    box-shadow: 0px 5px 21px 0px rgba(0, 0, 0, 0.14);
    border-radius: 10px;
    position: relative;
    margin: 0 16px;
    overflow: hidden;
    cursor: pointer;
}

.index_topic .topic_list .topic_item:hover .topic_item_content .topic_item_content_title {
    text-decoration: underline;
}

.index_topic .topic_list .topic_item img {
    width: 100%;
    height: 100%;
}

.index_topic .topic_list .topic_item .topic_item_type {
    position: absolute;
    top: 15px;
    right: 18px;
    width: 80px;
    height: 35px;
    border-radius: 0px 20px 0px 20px;
    background: rgba(0, 0, 0, 0.3);
    font-size: 16px;
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
}

.index_topic .topic_list .topic_item .topic_item_content {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 150px;
    background: linear-gradient(#0000 0%, #000000e6 100%);
    padding: 15px 15px 25px 35px;
    color: #fff;
}

.index_topic .topic_list .topic_item .topic_item_content .topic_item_content_title {
    font-size: 20px;
    font-weight: bold;
}

.index_topic .topic_list .topic_item .topic_item_content .topic_item_content_content {
    font-size: 16px;
    line-height: 1.5em;
    margin: 10px 0 0 0;
}

.back-top {
    position: fixed;
    bottom: 100px;
    right: 100px;
    z-index: 1000;
    transition: opacity 0.3s;
}

.back-top .back-top-content {
    width: 48px;
    height: 48px;
    background-color: #ffffff;
    box-shadow: 4px 4px 18px 0px rgba(31, 31, 31, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    margin: 10px 0;
}

.back-top .back-top-content i {
    font-size: 24px;
    color: #200e32;
}

.back-top .back-top-content:hover {
    opacity: 0.8;
}



.iconfont {
    cursor: pointer;
}