body {
    margin: 0;
    font: 16px/1.5 "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "WenQuanYi Micro Hei", "Microsoft Yahei", sans-serif;
    color: black;
}

h2 {
    font-size: 1.5em;
    font-weight: bold;
}

a {
    color: #333333;
    text-decoration: none !important;
}

article {
    text-align: justify;
}

ul:before,
ul:after {
    content: "";
    display: table;
}

ul:after {
    clear: both;
}

ul {
    zoom: 1;
    padding-left: 0px;
    list-style: none;
}

li {
    line-height: 1.8em;
}

.container:before,
.container:after {
    content: "";
    display: table;
}

.container:after {
    clear: both;
}

.container {
    zoom: 1;
    width: 1120px;
    margin: 0 auto;
}

.nav li {
    float: left;
}

.red {
    color: red;
}

.nav .nav_r {
    float: right;
}

#top_nav {
    height: 30px;
    line-height: 30px;
    background-color: #f3f3f3;
}

#banner {
    height: 160px;
    background: url('/images/banner.jpeg') no-repeat top center;
}

#banner h1 {
    font-size: 5em;
    line-height: 160px;
    margin: 0 20px;
}

#main_nav {
    height: 50px;
    background-color: #c12c20;
}

#main_nav ul {
    position: relative;
}

#main_nav a {
    color: white;
}

#main_nav li {
    width: 12%;
    height: 50px;
    line-height: 50px;
    font-size: 1.3em;
    text-align: center;
    display: list-item;
    vertical-align: middle;
}

#main_nav li:hover {
    background: #9c1f14;
}

#main_nav img {
    height: 26px;
    margin: 6px 5px 12px 0;
    vertical-align: middle;
    margin-top: 6px;
}

#main_nav .submenu_content {
    display: none;
    background-color: white;
    position: absolute;
    z-index: 2;
    width: calc(100% - 2px);
    left: 0;
    border: 1px solid #fcfcfc;
}

#main_nav .submenu_content li {
    font-size: 16px;
    width: 25%;
}

#main_nav .submenu_content a {
    color: #333333;
}

#main_nav .submenu_content li:hover {
    background-color: white;
}

#float_menu {
    position: fixed;
    right: 20px;
    font-size: 0.9em;
}

.main .container {
    margin-top: 20px;
}

.float_item,
#float_open,
#float_close {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: #c12c20;
    text-align: center;
    line-height: 60px;
    margin: 5px;
}

#float_close {
    height: 20px;
    line-height: 20px;
    border-radius: 10px;
}

#float_menu a {
    color: white;
}

#wechat_qr_img {
    width: 160px;
    height: 160px;
    position: absolute;
    left: -160px;
    top: 30px;
}

#search_form,
#float_open,
#wechat_qr_img {
    display: none;
}

#carousel {
    width: 61%;
    height: 470px;
    float: left;
}

#carousel img {
    width: 100%;
    height: 430px;
}

#carousel video {
    width: 100%;
}

#carousel .item h3 {
    margin: 0;
    height: 39px;
    line-height: 39px;
    background-color: rgba(0, 0, 0, 0.5);
    position: relative;
    margin-top: -6px;
    color: white;
    padding-left: 15px;
}

#carousel .owl-dots {
    margin-top: -37px;
    position: absolute;
    right: 30px;
}

#carousel .owl-dots .active {
    background-color: rgba(255, 255, 255, 0.9);
}

#carousel .owl-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin: 0 5px;
    background-color: rgba(255, 255, 255, 0.3);
}

#side_ls {
    width: 38%;
    height: 480px;
    float: right;
    overflow: hidden;
}

#side_ls .sec_ttl {
    margin-top: 0;
}

#hotest_course_ls {
    display: none;
}

.news_ls {
    font-size: 1.1em;
    line-height: 2.3em;
    margin-top: 0;
}

.news_ls li a {
    color: #333333;
}

.sec_ttl {
    line-height: 34px;
    margin: 20px 0 0 0;
    padding: 0 10px 2px 10px;
    border-bottom: 3px solid #c12c20;
}

.video_ls li {
    width: 100%;
    height: 125px;
    overflow: hidden;
    clear: both;
    padding: 12px 0;
    border-bottom: 1px solid #EEE;
    color: #aaa;
    margin: 10px 5px;
}

.video_ls li a.thumb {
    height: 150px;
    float: left;
    margin-right: 7px;
    margin-bottom: 3px;
    margin-left: 10px;
    display: inline;
}

.video_ls li a.thumb img {
    width: 146px;
    display: block;
    padding: 1px;
    border: 1px solid #EEE;
}

.video_ls li a.ttl_1 {
    overflow: hidden;
    line-height: 25px;
    font-weight: bold;
    font-size: 14px;
    margin-left: 2px;
}

.video_ls li a.ttl_2 {
    display: none;
    overflow: hidden;
    line-height: 25px;
    font-weight: bold;
    font-size: 14px;
    margin-left: 2px;
}

.video_ls span.intro {
    display: block;
    line-height: 25px;
    margin-left: 5px;
    padding-left: 10px;
    padding-right: 10px;
}

.video_ls span.info {
    display: block;
    line-height: 25px;
    color: #555;
    padding-left: 10px;
}

.viewbox {
    width: 712px !important;
    overflow: hidden;
    padding-bottom: 8px;
}

.viewbox .title {
    text-align: center;
    overflow: auto;
    padding-top: 10px;
}

.viewbox .attr {
    text-align: center;
    color: #999;
    font-size: 12px;
}

.viewbox .intro {
    background: #f5f9fc;
}

.viewbox .intro {
    width: 90%;
    padding: 8px 16px;
    line-height: 24px;
    background: #f5fcee;
    border: 1px solid #DCDDDD;
    font-size: 14px;
    color: #706a6a;
    margin: 8px auto 0 auto;
}

.viewbox .videoarea {
    width: 100%;
    text-align: center;
}

.viewbox .content {
    font-size: 14px;
    padding: 12px 0px;
    line-height: 25px;
    color: #333;
}

#latest_news_ttl_m,
#latest_news_ctt_m {
    display: none;
}

.sec_ttl a {
    font-weight: bold;
    color: #c12c20;
}

.sec_ttl a:hover {
    color: #c12c20;
}

.sec_ttl .tab {
    margin: 0 10px;
    font-size: 0.8em;
    background-color: #d7ebfb;
    line-height: 36px;
    padding: 3px 20px;
    border-radius: 5px;
    font-weight: normal;
}

.sec_ttl .tab a {
    color: #2f6ca8;
}

.more {
    float: right;
    font-size: 0.8em;
    background-color: #cccccc;
    color: white;
    border-radius: 5px;
    line-height: 1em;
    padding: 0 5px;
    margin-top: 5px;
}

.more:hover {
    background-color: #c12c20;
}

.more a {
    color: white;
}

.thumb_ls {
    display: flex;
}

.thumb_ls li {
    width: 23.5%;
    margin-right: 2%;
    min-height: 360px;
    float: left;
    padding: 10px 0;
}

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

.thumb_ls li img {
    max-width: 100%;
}

.card_ls {
    display: flex;
    flex-wrap: wrap;
}

.thumb_ls li img:hover,
.card_ls li img:hover {
    transform: scale(1.05);
    transition: 0.6s;
}

.thumb_ls li h3 {
    margin: 0;
    font-size: 1em;
    line-height: 1.2em;
}

.thumb_ls li p {
    margin: 0;
    line-height: 30px;
    font-size: 0.8em;
    line-height: 1.2em;
}

.icon_ls li {
    width: 25%;
    height: 50px;
    float: left;
    line-height: 50px;
    font-size: 1.2em;
    display: block;
}

.icon_ls img {
    height: 28px;
    margin: 6px 5px 12px 0;
    vertical-align: middle;
}

.breadcrumb {
    height: 36px;
    display: flex;
    list-style: none;
    margin-top: 20px;
    line-height: 36px;
    border-radius: 5px;
    padding-left: 20px;
    background-color: #f3f3f3;
}

.breadcrumb li {
    line-height: 36px;
}

.breadcrumb-item + .breadcrumb-item::before {
    padding: 0 10px;
    content: "/";
}

.course_cat h3,
.chapter_ttl {
    font-size: 1.2em;
    line-height: 2.6em;
    text-align: center;
}

.tree_l2 li:after {
    content: ' ';
    position: absolute;
    top: 15px;
    left: 3px;
    width: 10px;
    border: none;
    border-top: 1px solid #ddd;
}

.tree_l2 li:not(:last-child):before {
    content: ' ';
    position: absolute;
    top: 0;
    left: 3px;
    height: 100%;
    border: none;
    border-left: 1px solid #ddd;
}

.tree_l2 li:last-child:before {
    content: ' ';
    position: absolute;
    top: -5px;
    left: 3px;
    height: 20px;
    border: none;
    border-left: 1px solid #ddd;
}

.tree_l1 li {
    position: relative;
}

.tree_l2 li {
    color: black;
}

.tree_l1,
.tree_l1 ul {
    padding-left: 0;
}

.tree_item {
    list-style: none;
    line-height: 30px;
}

.tree_item span {
    margin-left: 18px;
}

.tree {
    display: none;
}

.list_ttl {
    font-size: 1.2em;
    line-height: 2em;
    border-bottom: 2px solid #c12c20;
    padding: 0 15px;
}

.list {
    list-style: none;
    line-height: 26px;
    padding: 0 15px;
    font-size: 16px;
}

.list .pub_time {
    float: right;
}

.page_nos {
    width: 100%;
    bottom: 0;
    font-size: 14px;
    text-align: center;
}

.page_nos ul {
    height: 60px;
    display: inline-block;
    margin: 30px 0 0 0;
}

.page_nos ul li {
    float: left;
    margin: 0 5px;
    border: 1px solid #dddddd;
    color: #666666;
    line-height: 2em;
}

.page_nos li a {
    display: block;
    padding: 0 15px;
    color: #666666;
}

.page_nos li:first-child {

}

.page_nos li:last-child {
    border-right: 1px solid #dddddd;

}

/* page_nos移动端样式：page_nos_m */
.page_nos_m {
    width: 100%;
    bottom: 0;
    font-size: 14px;
    text-align: center;
}

.page_nos_m ul {
    height: 60px;
    display: inline-block;
    margin: 0 auto;
}

.page_nos_m ul li {
    float: left;
    margin: 0 5px;
    border: 1px solid #dddddd;
    color: #666666;
    line-height: 2em;
}

.page_nos_m li a {
    display: block;
    padding: 0 8px;
    color: #666666;
}

.page_nos_m li:last-child {
    border-right: 1px solid #dddddd;
}

.pageButton_m {
    border: none;
    padding: 1px 7px;
    background-color: transparent;
}

.pageIndex_m {
    width: 30px;
    border: none;
    text-align: center;
    vertical-align: inherit;
}

.pageIndex {
    width: 40px;
    border: none;
    text-align: center;
    vertical-align: inherit;
}

.pageButton {
    border: none;
    padding: 1px 13px;
    background-color: transparent;
}

.article_ttl,
.article_info {
    text-align: center;
}

.article_ttl {
    font-size: 1.5em;
}

.article_info {
    font-size: 0.9em;
}

.article_ctt {
    line-height: 2em;
}

.card_item {
    width: calc(23.5% - 2px);
    float: left;
    margin: 10px 2% 10px 0;
    min-height: 240px;
    border: 1px solid #dddddd;
    border-radius: 5px;
    line-height: 1.5em;
}

.card_item:nth-child(4n+0) {
    margin-right: 0;
}

.card_thumb {
    width: calc(100% - 30px);
    margin: 15px;
}

.card_thumb img {
    width: 100%;
    max-height: 230px;
    max-width: 100%;
}

.card_info {
    width: calc(100% - 30px);
    margin: 10px 15px;
    float: left;
}

.card_info h3,
.card_info p {
    margin: 0;
    overflow: hidden;
}

.card_info h3 {
    font-size: 1.1em;
    height: 2em;
    line-height: 2em;
}

.card_info p {
    font-size: 1.0em;
    color: #333333;
    height: 70px;
    word-break: break-all;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
    overflow: hidden;
}

.card_course_ls {
    font-weight: bold;
    width: calc(100% - 30px);
    margin: 10px 15px;
    height: 5em;
    overflow: hidden;
}

.course_item {
    margin: 0 5px;
    font-size: 0.8em;
    background-color: #d7ebfb;
    padding: 3px 10px;
    border-radius: 3px;
    font-weight: normal;
}

.course_ls_item {
    width: 24%;
    float: left;
}

.tree_frame {
    display: flex;
}

.tree_menu {
    width: 20%;
    min-height: 600px;
    background-color: #f2f7fb;
}

.tree_menu h2 {
    padding: 0 20px;
    margin: 0;
    line-height: 2em;
    font-size: 1.5em;
    font-weight: bold;
}

.tree_ctt {
    width: calc(80% - 20px);
    padding-left: 20px;
    min-height: 600px;
    border-left: 1px solid #dddddd;
}

.col_frame {
    width: 100%;
    display: flex;
}

.thumbnail {
    width: 30%;
    min-height: 300px;
}

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

.info {
    width: calc(70% - 20px);
    margin-left: 20px;
}

article img {
    max-width: 100%;
}

article video {
    width: 100%;
}

#footer {
    border-top: 3px solid #c12c20;
    font-size: 0.9em;
    color: #666666;
    background-color: #f3f3f3;
}

@media screen and (max-width: 960px) {
    .video_ls li a.ttl_2 {
        display: block;
    }

    .container {
        width: 96% !important;
        padding: 0 !important;
        margin-bottom: 50px;
    }

    .media789 {
        margin-bottom: 0px !important;
    }

    .media789 #carousel .item a {
        height: 253px !important;
    }

    .mediaMarBottom {
        margin-bottom: 50px !important;
    }

    #banner {
        margin: 0;
        padding: 0;
        height: 120px;
        background: url('/images/banner_m.jpeg') no-repeat top center;
    }

    #banner h1 {
        height: 120px;
        font-size: 2em;
        line-height: 120px;
        margin: 0;
        text-align: left;
    }

    #nav .container ul {
        white-space: nowrap;
        display: flex;
        overflow-x: auto;
    }

    #nav ul li {
        width: auto !important;
    }

    #main_nav {
        height: 72px;
    }

    #main_nav li {
        font-size: 1.1em;
        height: 36px;
        line-height: 36px;
        width: 24.5%;
        text-align: left;
    }

    #main_nav img {
        height: 20px;
    }

    #carousel,
    #side_ls {
        width: 100%;
    }

    #carousel,
    #carousel img {
        height: 300px;
    }

    #carousel .item video {
        width: 100%;
        height: 260px;
    }

    #carousel .item h3 {
        font-size: 1.0em;
        text-overflow: ellipsis;
        overflow: hidden;
        white-space: nowrap;
        margin-top: 10px;
    }

    #side_ls {
        display: none;
    }

    #latest_news_ttl_m,
    #latest_news_ctt_m {
        display: block;
    }

    .thumb_ls {
        display: block;
    }

    .thumb_ls li {
        width: 100%;
        margin: 10px 0;
    }

    .video_ls li a.ttl_1 {
        display: none;
        overflow: hidden;
        line-height: 25px;
        font-weight: bold;
        font-size: 14px;
        margin-left: 2px;
    }

    .card_item {
        width: calc(49% - 2px);
        margin-right: 2%;
        min-height: 180px;
    }

    .card_item {
        line-height: 1.0em;
    }

    .card_item:nth-child(even) {
        margin-right: 0;
    }

    .card_thumb {
        width: calc(100% - 20px);
        margin: 10px;
    }

    .card_info {
        float: left;
        overflow: hidden;
        display: -webkit-box;
        -webkit-line-clamp: 3;
        -webkit-box-orient: vertical;
    }

    .card_info p {
        height: auto !important;
        font-size: 0.76em;
        font-weight: bold;
    }

    .icon_ls li {
        width: 50%;
    }

    #float_menu {
        display: none;
    }

    .tree_menu {
        display: none;
    }

    .tree_ctt {
        width: 100%;
        border-left: none;
    }

    .course_ls_item {
        width: 100%;
    }

    .sec_ttl .tab {
        margin: 0 5px;
        padding: 3px 10px;
    }
}

.viewbox .title {
    text-align: center;
    overflow: auto;
    padding-top: 10px;
}

[tabindex='-1'].video-js {
    width: 100%;
}

@media screen and (max-width: 600px) {
    #carousel,
    #carousel img {
        height: 260px;
    }
}

.textHidden {
    word-break: break-all;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 1;
    overflow: hidden;
}

.search_ttl {
    /* font-size: 18px !important; */
}

/* 视频网页面样式调整 2022.1.11 */
#nav {
    margin: 0 !important;
}

.search_ttl {
    float: left;
    margin: 0 15px 0 0;
    color: #c12c20;
    line-height: 50px;
    font-size: 20px;
}

.add_inputs {
    margin: 60px auto 0;
    width: 690px;
    height: auto;
    overflow: hidden;
}

#keyword {
    float: left;
    width: 500px;
    height: 50px;
    text-indent: 1em;
    font-size: 16px;
    outline: none;
    border: 1px solid #c12c20;
    border-radius: 6px;
    display: block;
}

#super_search {
    display: block;
    float: right;
    padding: 0 25px;
    height: 50px;
    color: #fff;
    font-size: 18px;
    outline: none;
    background: #c12c20;
    border: 1px solid #c12c20;
    cursor: pointer;
    border-radius: 6px;
}

#ulid {
    margin: 60px 0 0 0;
    padding: 0;
}

#ulid li {
    padding: 10px 80px;
    line-height: 30px;
    font-size: 16px;
}

#ulid li:nth-child(odd) {
    background: #f9f9f9;
}

#ulid li span em {
    color: #c12c20;
    font-style: normal;
}

.page-con {
    margin-top: 60px;
    margin-bottom: 30px;
    padding-bottom: 10px;
    text-align: center;
}

.page-con a {
    display: inline-block;
    margin-right: 10px;
    padding: 0 8px;
    height: 34px;
    line-height: 34px;
    color: #000;
    border: 1px solid #c6c6c6;
    border-radius: 3px;
}

.page-con a.active {
    color: #fff;
    background: #c12c20;
    border: 1px solid #c12c20;
}

.page-con select {
    padding: 0 3px;
    height: 34px;
}