.main-header-box .message-mask-box {
    position: absolute;
    background-color: rgba(0, 0, 0, 0.4);
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
}

.content-main-box .main-header-box {
    position: relative;
}

.content-main-box .main-header-box img {
    width: 100%;
    display: block;
}

.content-main-box .main-header-box .header-title-box {
    position: absolute;
    left: 180px;
    top: 50%;
    margin-top: -46px;
}

.content-main-box .main-header-box .header-title-box .header-title {
    font-size: 32px;
    line-height: 45px;
    color: #FFFFFF;
}

.content-main-box .main-header-box .header-title-box .header-message {
    width: 330px;
    height: 42px;
    margin-top: 5px;
    font-size: 16px;
    line-height: 21px;
    color: #FFFFFF;
}

.content-main-box .main-container-box {
    position: relative;
    top: -60px;
}

.content-main-box .main-container-box .container-step-box .step-title-header {
    text-align: center;
    color: #000000;
    font-size: 20px;
    font-weight: bold;
    line-height: 21px;
}

.content-main-box .main-container-box .container-step-box .step-logo-message {
    font-size: 16px;
    line-height: 21px;
    margin: 30px auto 30px auto;
    color: #000000;
    width: 920px;
    text-align: left;
}

.content-main-box .main-container-box .container-step-box .step-pic-box .step-pic-img {
    width: 920px;
    display: block;
    margin: 0 auto;
}

.content-main-box .main-container-box .container-step-box .container-book-box {
    width: 920px;
    margin: 0 auto 100px auto;
    position: relative;
}

.content-main-box .main-container-box .container-step-box .container-book-box .container-book-list {
    width: 280px;
    margin: 0 auto 60px auto;
}

.content-main-box .main-container-box .container-step-box .container-book-box .container-book-list.book-list-third {
    top: 0;
}

.content-main-box .main-container-box .container-step-box .container-book-box .container-book-list.book-list-six {
    top: 797px;
}

.content-main-box .main-container-box .container-step-box .container-book-box .container-book-list.book-list-nine {
    bottom: -60px;
}

.content-main-box .main-container-box .container-step-box .container-book-box .container-book-list:nth-child(3n) {
    position: absolute;
    right: 0;
}

.content-main-box .main-container-box .container-step-box .container-book-box .container-book-list:nth-child(3n+1) {
    position: absolute;
    left: 0;
}

.content-main-box .main-container-box .container-step-box .container-book-box .container-book-list .book-list-pic img {
    width: 280px;
    -webkit-box-shadow: 0px 4px 2px rgba(0, 0, 0, 0.1);
    box-shadow: 0px 4px 2px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    display: block;
}

.content-main-box .main-container-box .container-step-box .container-book-box .container-book-list .book-list-name {
    font-size: 18px;
    line-height: 21px;
    color: #000000;
    margin: 20px 0;
}

.content-main-box .main-container-box .container-step-box .container-book-box .container-book-list .book-list-message {
    font-size: 13px;
    line-height: 18px;
    color: #000000;
    height: 270px;
    width: 280px;
    text-align: left;
}

.content-main-box .main-container-box .container-step-box .container-book-box .container-book-list .book-list-btn .book-btn-list {
    display: inline-block;
    vertical-align: middle;
    cursor: pointer;
    width: 100px;
    height: 38px;
    font-size: 13px;
    line-height: 38px;
    color: #000000;
    text-align: center;
    margin-right: 20px;
    border: 2px solid #000000;
}

.popwindow .modal-box {
    text-align: center;
}

.popwindow .modal-box.video-modal-box {
    z-index: 9999;
}

.popwindow .modal-box.detail-modal-box {
    z-index: 99;
}

.popwindow .modal-box .modal {
    padding: 60px 0 60px 0;
    border-radius: 8px;
}

.popwindow .modal-box .modal .modal-detail-close {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    position: absolute;
    right: -42px;
    line-height: 45.8px;
    cursor: pointer;
    background-color: #ffffff;
}

.popwindow .modal-box .modal .modal-detail-close .index-close-icon {
    width: 20px;
    height: 20px;
    line-height: 36px;
}

.popwindow .modal-box .modal.video-modal {
    width: 720px;
    background-color: #ffffff;
}

.popwindow .modal-box .modal.lesson-detail-modal {
    width: 600px;
    padding-top: 0;
    padding-bottom: 0;
    background-color: #ffffff;
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box {
    max-height: 600px;
    overflow-y: scroll;
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-header {
    height: 300px;
    border-top-left-radius: 8px;
    border-top-right-radius: 8px;
    background-position: center center;
    background-size: cover;
    background-repeat: no-repeat;
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .header-1 {
    background-image: url(../images/admin/lesson/lesson-header-pic1.jpg);
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .header-2 {
    background-image: url(../images/admin/lesson/lesson-header-pic2.jpg);
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .header-3 {
    background-image: url(../images/admin/lesson/lesson-header-pic3.jpg);
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .header-4 {
    background-image: url(../images/admin/lesson/lesson-header-pic.jpg);
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .header-5 {
    background-image: url(../images/admin/lesson/lesson-header-pic5.jpg);
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .header-6 {
    background-image: url(../images/admin/lesson/lesson-header-pic6.jpg);
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-header .lesson-header-pic {
    width: 100%;
    display: block;
    border-top-left-radius: 8px;
    border-top-right-radius: 8px;
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-content {
    position: relative;
    top: -100px;
    padding: 0 24px;
    background-color: #ffffff;
    -webkit-clip-path: polygon(0 100%, 0% 0%, 100% 7%, 100% 100%);
    clip-path: polygon(0 100%, 0% 0%, 100% 7%, 100% 100%);
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .detail-content4 {
    -webkit-clip-path: polygon(0 100%, 0% 0%, 100% 11%, 100% 100%);
    clip-path: polygon(0 100%, 0% 0%, 100% 11%, 100% 100%);
}


.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-content .lesson-title {
    font-size: 22px;
    line-height: 21px;
    color: #000000;
    padding-top: 50px;
    text-align: left;
    margin-bottom: 24px;
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-content .lesson-message-box .lesson-message-list {
    font-size: 13px;
    line-height: 18px;
    color: #000000;
    opacity: 0.7;
    margin-bottom: 4px;
    text-align: left;
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-content .lesson-message-box .lesson-message-list.message-list-title {
    opacity: 1;
    font-size: 16px;
    margin-top: 32px;
    margin-bottom: 16px;
    font-weight: bold;
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-content .lesson-message-box .lesson-video-box {
    height: 140px;
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-content .lesson-message-box .lesson-video-box .lesson-video-list {
    width: 33.333333%;
    height: 140px;
    display: inline-block;
    vertical-align: middle;
    float: left;
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-content .lesson-message-box .lesson-video-box .video-list1 .lesson-cover {
    background-image: url(../images/page1.jpg);
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-content .lesson-message-box .lesson-video-box .video-list2 .lesson-cover {
    background-image: url(../images/page2.jpg);
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-content .lesson-message-box .lesson-video-box .video-list3 .lesson-cover {
    background-image: url(../images/page3.jpg);
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-content .lesson-message-box .lesson-video-box .video-list4 .lesson-cover {
    background-image: url(../images/page3.png);
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-content .lesson-message-box .lesson-video-box .video-list5 .lesson-cover {
    background-image: url(../images/page5.jpg);
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-content .lesson-message-box .lesson-video-box .video-list6 .lesson-cover {
    background-image: url(../images/page6.jpg);
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-content .lesson-message-box .lesson-video-box .video-list8 .lesson-cover {
    background-image: url(../images/page8.jpg);
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-content .lesson-message-box .lesson-video-box .video-list9 .lesson-cover {
    background-image: url(../images/page9.jpg);
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-content .lesson-message-box .lesson-video-box .video-list10 .lesson-cover {
    background-image: url(../images/page10.jpg);
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-content .lesson-message-box .lesson-video-box .video-list11 .lesson-cover {
    background-image: url(../images/page11.jpg);
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-content .lesson-message-box .lesson-video-box .video-list12 .lesson-cover {
    background-image: url(../images/page12.jpg);
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-content .lesson-message-box .lesson-video-box .video-list13 .lesson-cover {
    background-image: url(../images/page13.jpg);
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-content .lesson-message-box .lesson-video-box .video-list14 .lesson-cover {
    background-image: url(../images/page14.jpg);
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-content .lesson-message-box .lesson-video-box .lesson-video-list:first-child .lesson-cover {
    margin: 0 auto 0 0 !important;
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-content .lesson-message-box .lesson-video-box .lesson-video-list:first-child .lesson-name {
    margin: 12px auto 0 0 !important;
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-content .lesson-message-box .lesson-video-box .lesson-video-list:last-child .lesson-cover {
    margin: 0 0 0 auto;
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-content .lesson-message-box .lesson-video-box .lesson-video-list:last-child .lesson-name {
    margin: 12px 0 0 auto;
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-content .lesson-message-box .lesson-video-box .lesson-video-list:nth-child(2) .lesson-cover {
    margin: 0 auto;
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-content .lesson-message-box .lesson-video-box .lesson-video-list:nth-child(2) .lesson-name {
    margin: 12px auto 0 auto;
}

.popwindow .lesson-tips {
    font-size: 12px;
    color: #ff0000;
    text-align: center;
    margin-top: 10px;
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-content .lesson-message-box .lesson-video-box .lesson-video-list .lesson-cover {
    width: 160px;
    height: 90px;
    position: relative;
    background-position: center center;
    background-size: cover;
    border-radius: 2px;
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-content .lesson-message-box .lesson-video-box .lesson-video-list .lesson-cover .video-play-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    margin-left: -16px;
    margin-top: -16px;
    width: 32px;
    height: 32px;
    cursor: pointer;
    display: block;
}

.popwindow .modal-box .modal.lesson-detail-modal .lesson-detail-content-box .lesson-detail-content .lesson-message-box .lesson-video-box .lesson-video-list .lesson-name {
    font-size: 13px;
    line-height: 18px;
    width: 160px;
    color: #000000;
    opacity: 0.7;
    margin-top: 12px;
    word-break: break-all;
}

.popwindow .modal-box .modal .video-content-box {
    padding: 0 20px;
}

.popwindow .modal-box .modal .video-content-box .video-js {
    width: 680px;
    height: 382px;
}

.popwindow .modal-box .modal .video-content-box video {
    width: 680px;
    height: 382px;
}

.lesson-table-box .tab-first {
    width: 80px;
    font-size: 13px;
    color: #000000;
    font-weight: 400;
    word-break: break-all;
}

.lesson-table-box tr {
    border-bottom: 1px solid #000000;
}

.lesson-table-box th {
    text-align: center;
    height: 40px;
    line-height: 1.5;
    padding: 0 10px;
    vertical-align: middle;
    border-right: 1px solid #000000;
}

.lesson-table-box th:last-child {
    border-right: 0;
}

.tab-detail {
    width: 140px;
    font-size: 13px;
    color: #000000;
    font-weight: 400;
    word-break: break-all;
}

.tab-second {
    width: 120px;
    font-size: 13px;
    color: #000000;
    font-weight: 400;
    word-break: break-all;
}

.tab-rowspan {
    width: 120px;
    font-size: 13px;
    color: #000000;
    font-weight: 400;
    line-height: 1.4;
    word-break: break-all;
}

.lesson-table-box {
    width: 100%;
    border: 1px solid #7b7b7b !important;
}

tbody tr {
    border-bottom: 1px solid #7b7b7b !important;
}

thead tr {
    border-bottom: 1px solid #7b7b7b !important;
}

th {
    font-size: 13px;
    color: #000000;
    font-weight: 400;
    line-height: 1.4;
    word-break: break-all;
}

td {
    height: 40px;
    font-size: 13px;
    color: #000000;
    font-weight: 400;
    line-height: 1.4;
    padding: 0 10px;
    border-right: 1px solid #7b7b7b;
    word-break: break-all;
}

.table-td1 {
    width: 120px;
}

td:last-child {
    border-right: 0;
}

.color-red {
    color: #ff0000;
}

.lesson-open-window .book-btn-list{
    display: inline-block;
    vertical-align: middle;
    cursor: pointer;
    width: 100px;
    height: 38px;
    font-size: 13px;
    line-height: 38px;
    text-align: center;
    position: relative;
    bottom: 50px;
    color: #3193ef;
    text-decoration: underline;
    cursor: pointer;
}