@charset "UTF-8";

body {
    background: #F4F5F9;
    color: #666;
}

.box-container {
    width: 100%;
    padding-right: 15px;
    padding-left: 15px;
    margin-right: auto;
    margin-left: auto
}

@media (min-width:1200px) {
    .box-container {
        max-width: 1140px
    }
}

.course-header {
    background-color: #fff;
    height: 70px;
    width: 100%;
    line-height: 70px;
    border-bottom: solid 1px #d5d5d5;
    box-shadow: 0 2px 4px rgba(0, 0, 0, .2);
    margin-bottom: 14px;
    z-index: 1100;
    font-size: 20px;
    font-weight: bold;
}
.course-header .logo{
    height: 50px;
    margin-right: 10px;
}
@media (max-width:768px) {
    .course-header {
        height: 50px;
        line-height: 50px;
    }

    .course-header .logo {
        height: 30px;
    }
}

.item-title {
    position: relative;
    font-size: 32px;
    text-align: center;
    margin: 40px 0;
}

.item-title.bottom-line:before {
    content: "";
    position: absolute;
    width: 80px !important;
    bottom: -15px;
    height: 2px;
    background-color: #00a0e9;
    left: 50%;
    transform: translateX(-50%);
}

.course-video {
    display: -webkit-box;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
    flex-wrap: wrap;
    -webkit-box-pack: center;
    -webkit-justify-content: center;
    -ms-flex-pack: center;
    justify-content: center;
}

.course-video-item {
    width: 31%;
    padding: 20px;
    margin: 10px 1.16%;
    text-align: center;
    background: #fff;
    -webkit-box-shadow: 0 5px 10px 0 rgba(146, 146, 146, .1);
    -moz-box-shadow: 0 5px 10px 0 rgba(146, 146, 146, .1);
    box-shadow: 0 5px 10px 0 rgba(146, 146, 146, .1);
}

@media (max-width: 767px) {
    .item-title {
        margin: 20px 0;
        font-size: 24px;
    }

    .course-video-item {
        width: 100%;
        margin: 10px 0;
    }
}

.course-video-item video {
    width: 100%;
    height: 200px;
}

.course-video-item_title {
    margin-top: 10px;
}

.course-file {
    background: #fff;
    -webkit-box-shadow: 0 5px 10px 0 rgba(146, 146, 146, .1);
    -moz-box-shadow: 0 5px 10px 0 rgba(146, 146, 146, .1);
    box-shadow: 0 5px 10px 0 rgba(146, 146, 146, .1);
    padding: 15px;
    margin: 10px 0;
}

.course-file li {
    border-bottom: 1px solid #eee;
}

.course-file li:last-child {
    border: none;
}

.course-file_link {
    display: -webkit-box;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -webkit-align-items: center;
    -ms-flex-align: center;
    align-items: center;
    padding: 10px 0;
}

.course-file_link .file-container {
    -webkit-flex: 1;
    -ms-flex: 1;
    flex: 1;
    padding: 0 10px;
}

.course-file_link .file-container_title {
    font-size: 16px;
    padding-bottom: 5px;
    color: #252b3a;
}

.course-file_link .file-container_date {
    font-size: 13px;
    line-height: 21px;
    color: #A0A2A8;
}

.course-file_link .file-container_date span~span {
    padding-left: 10px;
}

.course-file_link .course-file-download_btn {
    line-height: 30px;
    height: 30px;
    padding: 0 20px;
    border: 1px solid #3b516a;
    border-radius: 1px;
    font-size: 12px;
    color: #252b3a;
    cursor: pointer;
    text-align: center;
    background: transparent;
}

@media (max-width: 767px) {
    .course-file_link .course-file-download_btn {
        display: none;
    }
}

.course-file_link:hover .course-file-download_btn,
.course-file_link .course-file-download_btn:hover {
    color: #00a0e9;
    border: 1px solid #00a0e9;
}

.file-icons-doc {
    background: url(../images/doc.png) no-repeat center;
}

.file-icons-pdf {
    background: url(../images/pdf.png) no-repeat center;
}

.file-icons-ppt {
    background: url(../images/ppt.png) no-repeat center;
}

.file-icons-txt {
    background: url(../images/txt.png) no-repeat center;
}

.file-icons-xls {
    background: url(../images/xls.png) no-repeat center;
}

.file-icons-zip {
    background: url(../images/zip.png) no-repeat center;
}

.file-icons {
    display: inline-block;
    width: 50px;
    height: 50px;
    background-size: cover;
}

.course-footer {
    text-align: center;
    line-height: 30px;
    font-size: 13px;
    padding-top: 20px;
}