@charset "UTF-8";
/*公共样式表：头部、尾部、侧边栏*/
#header-nav {
    position: relative;
}
.header_box {
    position: relative;
}
.fix-header {
    position: fixed !important;
    top: 0;
    width: 100%;
    z-index: 999;
    box-shadow: 0 2px 10px 0 rgba(0,0,0,.1);
    -webkit-box-shadow: 0 2px 10px 0 rgba(0,0,0,.1);
}
.fixed_nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 999;
    box-shadow: 0 1px 12px rgba(98,107,181,.25);
    -webkit-box-shadow: 0 1px 12px rgba(98,107,181,.25);
}
.fixed_nav .head-wrap {
    border-bottom: 0 !important;
}
.pt75 {
    padding-top: 75px;
}
.offset {
    transform: translate(0, 10%);
    transition: all 0.2s ease-in-out;
}
.scrolling {
    visibility: visible;
    transform: translate(0, 0);
}
.header_box .toolbar_inner {
    background-color: #f5f5f6;
    z-index: 999;
}
.header_box .head-wrap {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: justify;
    -ms-flex-pack: justify;
    justify-content: space-between;
    position: relative;
    z-index: 1;
    -webkit-transition: background-color .3s;
    transition: background-color .3s;
    padding: 0 2%;
    height: 75px;
    border-bottom: 1px solid #dfe1e6;
}
.header_box .head-wrap-left {
    position: relative;
}
.header_box .head-wrap-left a {
    display: block;
}
.header_box .head-wrap-left img {
    display: inline-block;
    height: 50px;
}
.header_box .head-wrap-middle {
    -webkit-box-flex: 0;
    flex: none;
}
.header_box .head-wrap-middle .nav-menu {
    width: auto;
    height: 75px;
    font-size: 0;
    float: left;
}
.header_box .head-wrap-middle li {
    position: relative;
    display: inline-block;
    list-style: none;
    font-size: 16px;
    height: 100%;
    line-height: 75px;
}
.header_box .head-wrap-middle li a {
    display: inline-block;
    box-sizing: border-box;
    height: 100%;
    color: inherit;
    padding: 0 16px;
}
.header_box .head-wrap-middle li .hot {
    position: absolute;
    top: 8px;
    right: -4px;
    display: inline-block;
    padding: 0 6px;
    font-size: 12px;
    text-align: center;
    color: #fff !important;
    border-radius: 2px;
    height: 18px;
    line-height: 18px;
}
.header_box .head-wrap-middle li.app {
    color: #D10000;
    font-weight: 700;
    font-style: italic;
}
.header_box .head-wrap-right {
    -webkit-box-flex: 0;
    flex: none;
}
.header_box .head-wrap-right .head-btn {
    position: relative;
    height: 75px;
    line-height: 75px;
    text-align: center;
    padding: 0 8px;
}
.header_box .head-wrap-right .head-btn>a {
    font-size: 16px;
    cursor: pointer;
}
.header_box .head-wrap-right .head-btn:hover a {
    cursor: pointer;
}
.header_box .head-wrap-right i {
    display: inline-block;
    width: 1px;
    height: 12px;
    background: #777777;
    margin-top: calc((75px - 12px)/2);
}
.header_box .head-wrap-right .userinfo {
    height: 75px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.header_box .head-wrap-right .userinfo .head-pic {
    width: 30px;
    height: 30px;
    border-radius: 50%;
}
.header_box .head-wrap-right .userinfo span {
    font-size: 16px;
    margin-left: 10px;
}
/*导航栏选中*/
.header_box .head-wrap-middle .nav-active {
    color: #04539c;
    font-weight: 600;
}
.header_box .head-wrap-middle .nav-active::before {
    content: "";
    width: 50%;
    height: 2px;
    background-color: #04539c;
    position: absolute;
    top: 85%;
    left: 25%;
}
/*课程列表*/
.course-list-box {
    flex-wrap: wrap;
    justify-content: space-between;
    background-size: cover;
    padding: 0 10px;
}
.course-list-box .course-item-list {
    position: relative;
    width: 300px;
    background: #FFFFFF;
    box-shadow: 0 3px 13px 4px #f3f3f3;
    border-radius: 8px;
    transition: all .2s linear;
}
.course-list-box .course-item-list:hover {
    box-shadow: 5px 5px 10px rgba(0, 0, 0, .05), -5px 0 10px rgba(0, 0, 0, .05);
    cursor: pointer;
    transform: translate3d(0, -4px, 0);
}
.course-list-box .course-item-list>a {
    display: block;
}
.course-list-box .course-item-list .course-img {
    height: 172px;
    margin-bottom: 8px;
    border-radius: 8px 8px 0 0;
    position: relative;
    overflow: hidden;
    background-size: cover;
}
.course-list-box .course-item-list .course-title {
    font-size: 15px;
    height: 56px;
    line-height: 22px;
    padding: 10px;
    color: #334c72;
    font-weight: 600;
    margin-bottom: 5px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: normal;
    box-sizing: border-box;
    display: -moz-box;
    -moz-line-clamp: 2;
    -moz-box-orient: vertical;
    word-wrap: break-word;
    word-break: break-all;
}
.course-list-box .course-item-list .course-difficulty {
    font-size: 12px;
    color: #9199a1;
    line-height: 18px;
    padding: 0 8px;
}
.course-list-box .course-item-list .price-wrapper {
    box-sizing: border-box;
    width: 100%;
    overflow: hidden;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 0;
    padding: 2px 8px 20px;
}
.course-list-box .course-item-list .course-tc {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #11233f;
    font-size: 12px;
    height: 16px;
}
.course-list-box .course-item-list .course-tc .avatar {
    width: 12px;
    height: 13px;
    margin-right: 5px;
}
.course-list-box .course-item-list .price-wrapper .free {
    width: 82px;
    height: 24px;
    color: #fff;
    font-size: 12px;
    background: linear-gradient(to right, #df5e00, #ff6f06);
    border-radius: 12px;
    text-align: center;
    line-height: 24px;
}
.course-list-box .course-item-list .selling-price {
    color: #f01414;
    font-weight: bold;
    line-height: 20px;
    margin-right: 2px;
    font-size: 12px;
}
.course-list-box .course-item-list .origin-price {
    color: #6d7278;
    line-height: 20px;
}

    /*侧边栏：客服*/
.footer_box .aside-customer-service {
    position: fixed;
    right: 6px;
    bottom: 45%;
    z-index: 999;
}
.footer_box .aside-customer-service ul li {
    width: 50px;
    height: 50px;
    margin-bottom: 1px;
    text-align: center;
    cursor: pointer;
    font-size: 30px;
    background-color: #9F9F9F;
    color: #fff;
    border-radius: 2px;
    opacity: .95;
}
.footer_box .aside-customer-service a {
    display: inline-block;
    width: 50px;
    height: 50px;
    padding: 4px;
    box-sizing: border-box;
    text-align: center;
}
.footer_box .aside-customer-service i {
    font-size: 42px;
    color: #e2e2e2;
    display: inline-block;
}
.footer_box .aside-customer-service i.layui-icon-service {
    font-size: 38px;
}
.footer_box .aside-customer-service li:hover {
    background-color: #1E9FFF;
}
.footer_box .aside-customer-service li:hover i {
    color: #fff;
}
.footer_box .aside-customer-service .backTop {
    display: none;
}
/* 网页尾部 */
.footer {
    background: #1f1f1f;
    line-height: 1.75;
    z-index: 1;
    color: #FFFFFF;
}
.footer .site_footer {
    width: 1280px;
    margin: 0 auto;
    padding: 36px 0;
}
.footer .friend-link {
    width: 100%;
    box-sizing: border-box;
    border-bottom: 1px solid #3b3c3c;
}
.footer .friend-link .title {
    font-size: 20px;
    font-weight: normal;
    color: #fff;
}
.footer .friend-link .link-main {
    padding: 10px 0;
}
.footer .friend-link .link-main>a {
    color: #83888a;
    padding-right: 20px;
    display: inline-block;
    font-size: 14px;
}
.footer .footer_main {
    width: 100%;
    padding: 30px 0;
    align-items: self-start;
}
.footer .footer_main .footer_main_left {
    flex: 1;
    align-items: flex-start;
    justify-content: flex-start;
}
.footer .footer_main .footer-item {
    width: 185px;
}
.footer .footer_main .footer-item .list_title {
    display: inline-block;
    font-size: 18px;
    color: #ffffff;
    margin-right: 10px;
    margin-bottom: 2px;
}
.footer .footer_main .footer-item a {
    font-size: 14px;
    color: #83888a;
    line-height: 34px;
}
.footer .footer_main .footer_main_right {
    width: 200px;
}
.footer .footer_main_right h3 {
    color: #83888a;
}
.footer .footer_main_right .about-wx {
    margin-top: 10px;
    align-items: flex-start;
    justify-content: space-between;
}
.footer .footer_main_right .wx-contact {
    width: 90px;
}
.footer .footer_main_right .wx-contact span {
    color: #83888a;
    display: block;
    margin-top: 2px;
    text-align: center;
}
.footer .site_footer .copyright {
    text-align: center;
    border-top: 1px solid #3b3c3c;
    padding-top: 20px;
    color: #8c8c8c;
}
.footer .site_footer .copyright a {
    display: inline-block;
    color: #fff;
}

/* 侧边栏返回顶部 */
#DirectToTop {
    width: 50px;
    height: 50px;
    background-color: #0d3b68;
    position: fixed;
    right: -50px;
    bottom: 200px;
    padding-top: 12px;
    cursor: pointer;
    z-index: 999;
    transition: all .4s;
    -webkit-transition: all .4s;
    -moz-transition: all .4s;
    -ms-transition: all .4s;
    -o-transition: all .4s;
    border-radius: 5px;
    -webkit-border-radius: 5px;
    -moz-border-radius: 5px;
    -ms-border-radius: 5px;
    -o-border-radius: 5px;
}
#DirectToTop:hover{
    background-color: #017c74;
}
#DirectToTop:hover .icon_t {
    transform: translateY(-3px);
    -webkit-transform: translateY(-3px);
    -moz-transform: translateY(-3px);
    -ms-transform: translateY(-3px);
    -o-transform: translateY(-3px);
}
#DirectToTop .icon_t {
    width: 100%;
    height: 7px;
    background: url(../images/icon/icon_top.png) no-repeat center;
    transition: all .4s;
    -webkit-transition: all .4s;
    -moz-transition: all .4s;
    -ms-transition: all .4s;
    -o-transition: all .4s;
}
#DirectToTop .h3_top {
    line-height: 24px;
    font-size: 12px;
    color: #fff;
    text-align: center;
    text-transform: uppercase;
}
#DirectToTop.on {right: 30px;}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 6px;
    height: 12px;
    background-color: #fff;
}
::-webkit-scrollbar-thumb {
    background: #d2d2d2;
    border-radius: 0;
}
/* 侧边栏推荐文章 */
.aside-article {
    width: 100%;
    margin-bottom: 20px;
    padding: 16px;
    background: url(../images/aside-article-bg.png) no-repeat left top #fff;
    background-size: 100%;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 8px 0 rgba(28, 31, 33, 0.1);
}
.aside-article h3 {
    font-size: 16px;
    color: #222;
    font-weight: 900;
    height: 22px;
    line-height: 22px;
    position: relative;
}
.aside-article h3 .recycle {
    display: inline-block;
    width: 18px;
    height: 18px;
    position: absolute;
    left: 4px;
    top: 9px;
    background-size: cover;
    background-image: url(../images/icon/recycle.png);
}
.aside-article .article-hot {
    margin-top: 10px;
    position: relative;
}
.aside-article .article-list {
    height: 36px;
    line-height: 36px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
}
.aside-article .article-list:first-child {
    width: 100%;
    height: 160px;
    overflow: hidden;
    position: relative;
}
.aside-article .article-list > a {
    display: block;
    color: #525050;
    font-size: 14px;
}
.aside-article .article-list:first-child img {
    width: 100%;
    height: 100%;
}
.aside-article .article-list:first-child p {
    position: absolute;
    bottom: 0;
    left: 0;
    z-index: 99;
    height: 36px;
    line-height: 36px;
    background-color: #808080;
    padding: 0 4px;
    color: #fff;
}
/* 侧边栏推荐课程 */
.aside-course {
    width: 100%;
    margin-bottom: 20px;
    background-color: #ffffff;
    box-sizing: border-box;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 8px 0 rgba(28, 31, 33, 0.1);
}
.aside-course .aside-course-title {
    padding-left: 18px;
    height: 60px;
    background: url(../images/course/course__timer.png) no-repeat center;
    background-size: 100% 100%;
    display: flex;
    align-items: center;
    font-size: 16px;
    color: #ff4633;
    line-height: 22px;
    font-weight: 600;
    margin-bottom: 10px;
}
.aside-course .aside-course-list {
    padding: 0 16px;
}
.aside-course .aside-course-list .aside-course-main {
    flex-direction: column;
    align-items: flex-start;
}
.aside-course .aside-course-item {
    margin-bottom: 20px;
    position: relative;
}
.aside-course .aside-course-item .tips {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 24px;
}
.aside-course .aside-course-item .tips p {
    position: absolute;
    top: 0;
    left: 0;
    height: 20px;
    line-height: 20px;
    padding: 0 6px;
    background-color: #ffe6c7;
    border-radius: 6px 0 6px 0;
    font-size: 12px;
    color: #9f9f9f;
}
.aside-course .aside-course-item .lay-flex {
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
}
.aside-course .aside-course-item img {
    border-radius: 6px;
    width: 124px;
    height: 70px;
}
.aside-course .aside-course-item .tit {
    flex: 1;
    padding-left: 12px;
    color: #525050;
    line-height: 20px;
}
/*详情页面导航*/
.breadcrumb {
    padding: 15px 0;
    font-size: 12px;
    position: relative;
}
.breadcrumb li.breadcrumb-pre {
    float: left;
    height: 20px;
    margin-right: 8px;
    line-height: 20px;
}
.breadcrumb .breadcrumb-pre a {
    float: left;
    color: #999;
}
.breadcrumb .breadcrumb-pre a:hover {
    color: #ff4633;
}
.breadcrumb .breadcrumb-pre .breadcrumb-arrow {
    float: left;
    width: 5px;
    height: 9px;
    margin: 6px 0 0 7px;
    background-position: -24px -672px;
    background-image: url("../images/icons.png");
}
.breadcrumb .breadcrumb-last {
    width: 375px;
    color: #333;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    float: left;
    height: 20px;
    margin-right: 8px;
    line-height: 20px;
}