.introduction {
    background-color: rgb(41, 163, 192);
    color: #fff;
    font-size: 18px;
    text-indent: 2em;
    font-family: "微软雅黑";
    line-height: 36px;
    letter-spacing: .5px;
    margin: 0 auto;
    padding: 12px 0 10px;
    margin-bottom: 30px;
}

.title1 {
    border-bottom: 3px solid #29a3c0;
    background: url("../images/icon1.png") no-repeat left bottom;
    height: 48px;
    font-size: 28px;
    font-weight: 700;
    padding-left: 50px;
    padding-top: 10px;
    margin-bottom: 20px;
}

.title1 h2 {
    float: left;
    font-size: 28px;
    font-weight: 700;
    color: #29a3c0;
    line-height: 40px;
    padding-top: 5px;
}

.title1 a {
    color: #666;
    font-size: 14px;
    padding-top: 16px;
    float: right;
}

.title1 a:hover {
    color: #409eff;
}

.hotspot {
    clear: both;
}

.hotspot_list ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin: 0 -15px;
}

.hotspot_bd {
    padding-left: 18px;
    flex: 1;
}

.hotspot_bd dt {
    font-weight: 700;
    font-size: 20px;
    padding-bottom: 15px;
}

.hotspot_bd dt,
.hotspot_bd dt a {
    color: #29a3c0;
}

.hotspot_bd dd,
.hotspot_bd dt {
    line-height: 28px;
    height: 28px;
    display: -webkit-box;
    /* 弹性伸缩盒子模型显示 */
    -webkit-box-orient: vertical;
    /* 设置盒子排列方向为垂直 */
    -webkit-line-clamp: 1;
    /* 限制显示的行数 */
    overflow: hidden;
    /* 隐藏溢出的内容 */
}

.hotspot_bd dd,
.hotspot_bd dd a {
    color: #333;
}

.hotspot_bd dd:hover a {
    color: #fea430;
}

.research_list ul {
    display: flex;
    justify-content: space-between;
    /* overflow: hidden; */
    margin: 0 -10px;
}

.research_item {
    width: 285px;
    height: 190px;
    padding: 0 10px 20px;
    position: relative;
}

.research_item span {
    width: 100%;
    height: 100%;
    overflow: hidden;
    display: block;
}

.research_item img {
    width: 100%;
    min-width: 100%;
    min-height: 100%;
    transition: 1s;
}

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

.research_item a {
    position: absolute;
    z-index: 5;
    left: 0;
    right: 0;
    margin: 0 auto;
    bottom: 40px;
    width: 71.92%;
    color: #fff;
    font-size: 18px;
    text-align: center;
    background-color: rgba(0, 0, 0, .3);
    border: 1px solid #666;
    height: 34px;
    line-height: 34px;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    padding: 0 5px;
    box-sizing: border-box;
}

.countrys_bd {
    background: #f5f5f5;
    padding-top: 15px;
    margin-bottom: 15px;
}

.countrys_bd li {
    float: left;
    width: 180px;
    height: 60px;
    color: #333;
    text-align: center;
    font-size: 16px;
    cursor: pointer;
    margin: 0 18px 10px 0;
    line-height: 40px;
}

.countrys_bd li:hover a {
    color: #409eff;
}

.col-3 {
    width: 30.5%;
}

.col-6 {
    width: 65.25%;
}

.col-5 {
    width: 47.9%;
}

.col-bd {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
}

.col-bd .list1 {
    width: 46.95%;
}

.list1 li {
    color: #333;
    cursor: pointer;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    line-height: 42px;
    font-size: 16px;
}

.list1 li,
.list1 a {
    color: #333;
}

.booklist ul {
    display: flex;
    justify-content: space-between;
    margin-right: -10px;
}

.booklist li {
    width: 20%;
    padding-right: 10px;
    box-sizing: border-box;
}

.booklist li img {
    width: 100%;
}

.tabc_more {
    display: block;
    color: #59b1a3;
    padding: 0 45px;
    color: #d18d2a;
    text-align: right;
    line-height: 42px;
    font-weight: bold;
}

.academic-tab {
    width: 100%;
    display: flex;
    height: 50px;
    border: 1px solid #29a3c0;
}

.academic-tab li {
    flex: 1;
    height: 50px;
    line-height: 50px;
    color: #fff;
    font-size: 18px;
    text-align: center;
    background: #29a3c0;
    cursor: pointer;
}

.academic-tab li.active {
    background-color: #fff;
    color: #333;
}

.academic-list {
    padding: 20px 15px;
    flex: 1;
    box-sizing: border-box;
}

.academic-list li {
    font-size: 16px;
    line-height: 32px;
    height: 32px;
    color: #333;
    display: -webkit-box;
    /* 弹性伸缩盒子模型显示 */
    -webkit-box-orient: vertical;
    /* 设置盒子排列方向为垂直 */
    -webkit-line-clamp: 1;
    /* 限制显示的行数 */
    overflow: hidden;
    /* 隐藏溢出的内容 */
}

.academic-list li a {
    color: #333;
}

.academic-list li:hover a {
    color: #2d8572;
}

.academic-more {
    padding-top: 18px;
    text-align: right;
}

.academic-more a {
    margin-top: 20px;
    line-height: 42px;
    color: rgb(64, 158, 255);
    font-weight: 700;
    text-align: center;
    line-height: 42px;
    font-size: 16px;
    text-align: center;
}

.authorlist {
    display: flex;
    padding: 20px 15px;
}

.authorlist li {
    display: flex;
    width: 25%;
    padding-right: 10px;
    cursor: pointer;
    box-sizing: border-box;
}

.authorlist li img {
    width: 120px;
    height: 160px;
    margin-right: 10px;
}

.author_bd dt {
    color: #8c8c8c;
    font-size: 18px;
    font-weight: 700;
    padding-bottom: 15px;
    line-height: 39px;
}

.author_bd dt a {
    color: #8c8c8c;
}

.author_bd dd {
    color: #333;
    line-height: 24px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
}

.hotspot_item {
    display: flex;
    width: 50%;
    padding: 0 15px 20px;
    box-sizing: border-box;
}

.hotspot_pic {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 220px;
    height: 160px;
    overflow: hidden;
}

.hotspot_pic img {
    min-width: 100%;
    min-height: 100%;
}

@media screen and (min-width:1199px) {
    .hotspot_pic img {
        width: 220px;
        height: 160px;
    }
}

@media screen and (max-width:1199px) {
    .nav>ul>li {
        padding: 0 10px;
    }
    .research_item {
        width: 25%;
        height: auto;
        box-sizing: border-box;
    }
    .research_item img {
        height: 100%;
    }
}

@media screen and (max-width:1076px) {
    .nav>ul>li {
        padding: 0 5px;
        font-size: 16px;
    }
}

@media screen and (max-width:992px) {
    .hotspot_item {
        width: 100%;
    }
    .research_item {
        width: 25%;
    }
    .row5 {
        flex-direction: column;
    }
    .row5 .col-3,
    .row5 .col-6 {
        width: 100%;
        margin-bottom: 10px;
    }
    .authorlist {
        flex-wrap: wrap;
    }
    .authorlist li {
        width: 33.33%;
    }
    .nav>ul>li {
        font-size: 14px;
    }
    .introduction .container {
        font-size: 14px;
        line-height: 30px;
        overflow: hidden;
        display: -webkit-box;
        -webkit-line-clamp: 4;
        /* 限制为3行 */
        -webkit-box-orient: vertical;
    }
}

@media screen and (max-width:768px) {
    .research_item {
        width: 50%;
    }
    .research_list ul {
        flex-wrap: wrap;
    }
    .pc-top {
        flex-direction: column;
        align-items: center;
    }
    .hotspot_item {
        width: 100%;
    }
    .row4 {
        flex-direction: column;
    }
    .row4 .col-5 {
        width: 100%;
    }
    .authorlist li {
        width: 50%;
    }
    .row6 .container-flex {
        flex-direction: column;
    }
    .row6 .academic-list {
        width: 100%;
        padding-bottom: 0;
    }
    .introduction .container {
        display: -webkit-box;
        -webkit-line-clamp: 3;
        /* 限制为3行 */
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .footer {
        margin-top: 30px;
    }
}

@media screen and (max-width:576px) {
    .booklist ul {
        flex-wrap: wrap;
        justify-content: flex-start;
    }
    .booklist li {
        width: 33.33%;
        margin-bottom: 10px;
    }
    .top-left span {
        display: block;
    }
    .authorlist li {
        width: 100%;
        margin-top: 10px;
    }
    .row4 .col-bd {
        flex-direction: column;
    }
    .row4 .col-bd .list1 {
        width: 100%;
        padding-bottom: 5px;
    }
    .countrys_bd li {
        margin: 0 5px;
    }
    .title1 h2 {
        font-size: 20px;
    }
    .list1 li {
        line-height: 26px;
        font-size: 14px;
    }
    .research_item {
        width: 50%;
    }
    .academic-tab li {
        font-size: 16px;
    }
    .list1 li,
    .countrys_bd li,
    .academic-list li,
    .research_item a {
        font-size: 14px;
    }
    .hotspot_bd dt {
        font-size: 16px;
    }
    .hotspot_bd {
        padding: 0;
    }
    .academic-more a {
        font-size: 14px;
    }
    .countrys_bd li {
        width: auto;
        max-width: 180px;
        margin-left: 15px;
        height: 40px;
        line-height: 40px;
    }
    .hotspot_item {
        flex-direction: column;
    }
    .hotspot_pic {
        width: 100%;
        margin-bottom: 10px;
    }
}