.card_body {
    padding-bottom: 2rem;
}

/*播放反馈*/
.play_suggest_popup {
    max-width: 700px;
    /*height: 410px;*/
    width: 70%;
    background-color: #fff;
    color: black;
    display: none;
    font-family: '宋体';
}

.play_suggest_popup .caption {
    text-align: center;
    border-bottom: 1px solid #ccc;
    position: relative;
    font-size: 1.5rem;
    color: #7d7d7d;
    line-height: 4rem;
    font-family: '宋体';
}

.play_suggest_popup .caption img {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    width: 2rem;
    height: 2rem;
    cursor: pointer;
}

.play_suggest_popup table {
    padding: 0.4rem 2.5rem 0;
    font-size: 1.066667rem;
}

.play_suggest_popup td {
    width: 100%;
    text-align: left;
    display: inline-block;
    vertical-align: middle;
}

.play_suggest_popup .options td {
    margin-top: 0.25rem;
}

.play_suggest_popup input[type="radio"] {
    margin: 3px 3px 0 5px;
}

.play_suggest_popup label {
    width: 100%;
    cursor: pointer;
    display: inline-block;
    padding: 0.25rem 0;
}

.play_suggest_popup textarea {
    width: 94%;
    border: 1px solid #ccc;
    resize: vertical;
    margin-left: 3.5%;
    font-size: 1rem;
    /*height: 4rem;*/
    margin-bottom: .5rem;
    padding: revert;
}

.play_suggest_popup .contact {
    width: 100%;
    display: inline-block;
    padding: 0.3rem 0;
}

.play_suggest_popup label:hover {
    background-color: #F1F9FF;
}

.play_suggest_popup input[type=button] {
    width: 6rem;
    height: 2rem;
    border-radius: 0.2rem;
    background-color: #0099e9;
    color: #fff;
    text-align: center;
    line-height: 1.5rem;
    outline: none;
    border: none;
    cursor: pointer;
    margin: .9rem .74rem .4rem;
    font-size: 1.066667rem;
    font-family: 宋体;
}

.play_suggest_popup .submit {
    text-align: center;
    display: inline-block;
    margin: 0;
}

.play_suggest_popup #suggestEmail {
    border: 1px solid #ccc;
    width: 83%;
    padding: 0 0.5rem;
    margin-left: 0.5rem;
    line-height: 2rem;
    font-size: 1rem;
    font-family: 宋体;
}

/*购买提醒*/
.buy_notice_popup {
    display: none;
    width: 80%;
    max-width: 31.6rem;
    min-width: 17rem;
    background-color: #fff;
    color: #333;
    font-size: 1.467rem;
    font-size: max(1.467rem, 22px);
    font-weight: 400;
    padding: 1.5rem .75rem;
    border-radius: 10px;
    font-family: 宋体;
}

.buy_notice_popup p {
    /*padding: 0.5rem 1.5rem;*/
    padding: 0.43rem 1.5rem;
    line-height: 2.25rem;
    text-indent: max(2.934rem, 44px);;
}

.buy_notice_popup .btn_div {
    text-align: center;
    padding: 0 1em 0.5em 1em;
    line-height: 2.5em;
}

.buy_notice_popup .buy_btn {
    border-color: #2e8ded;
    background-color: #2e8ded;
    color: #fff;
    border-radius: 4px;
    padding: 0.67rem 3.05rem;
    border: 1px solid;
}

.buy_notice_popup .buy_notice_popup_close {
    position: absolute;
    top: 0;
    right: -1.6em;
    width: 1.5em;
    height: 1.5em;
    cursor: pointer;
}


/*课程帮助*/
.course_help_bg {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    width: 100%;
    height: 100%;
    display: none;
}

.course_help {
    font-size: 1.06667rem;
    width: 4rem;
    background: #006EFF;
    border-radius: 1.35rem 0 0 1.35rem;
    cursor: pointer;
    position: fixed;
    bottom: 20%;
    right: 0;
    color: #fff;
    text-align: center;
    padding: 0 0.1rem 0 1.25rem
}

.course_help_detail::-webkit-scrollbar {
    width: 0;
}

/*放大后*/
.course_help_detail.show_big {
    position: fixed;
    width: 50%;
    height: 70%;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

.course_help_detail .help_head {
    background: url(/v3/img/bg_help.png);
    overflow: hidden;
    width: 100%;
    position: -webkit-sticky; /* Safari */
    position: sticky;
    top: 0;
}

/* 课程页帮助 标题上2个按钮*/
.course_help_detail .big_or_small {
    cursor: pointer;
    background: url("/v3/img/enlarge.png");
    float: right;
    width: 2rem;
    height: 2rem;
}

/*切换帮助标题上的按钮*/
.course_help_detail .show_big {
    background: url("/v3/img/narrow.png");
}

.course_help_detail .course_help_close {
    float: right;
    cursor: pointer;
    margin-left: 1rem;
}

/*.rich_html * {*/
/*    all: initial;*/
/*}*/
.course_help_detail .help_content {
    margin-bottom: 2rem;
}

.course_help_detail .top_box {
    position: -webkit-sticky; /* Safari */
    position: sticky;
    top: 32px;
    display: flex;
    background: #A7D3FF;
    cursor: pointer;
    font-size: 1rem;
}

.course_help_detail .problem_list {
    flex: auto;
    text-align: center;
    padding: 0.7rem 0;
}

.course_help_detail .current_help_tag {
    background: #D9EBFF;
    color: #ea9999;
    font-weight: bold;
}

.course_help_detail .arrow {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    float: right;
    margin-top: 0.5rem;
}

.course_help_detail .arrow-down {
    background: url(/v3/img/arrow-down.png) no-repeat;
}

.course_help_detail .arrow-up {
    background: url(/v3/img/arrow-up.png) no-repeat;
}

.course_help_detail .right_box {
    box-sizing: border-box;
    overflow: auto;
}

.course_help_detail .question_item_title {
    cursor: pointer;
    padding: 0.5rem 0;
    border-bottom: 1px solid #666;
    font-size: 1rem;
}

.course_help_detail .open_question_item_title span:first-child {
    font-weight: bold;
}

.course_help_detail .question_item_title:hover {
    background: #acdae1;
}

.course_help_detail .question_item_detail {
    display: none;
}

.land_tips {
    display: none;
    min-width: 11.3rem;
    max-width: 17.3rem;
    position: fixed;
    bottom: 0;
    right: 0;
    background: #fff;
    border: 1px solid #1296db;
    z-index: 1;
    border-radius: 5px;
}

.land_tips .head_land {
    text-align: center;
    background: #00a2e8;
    height: 1.5rem;
}

.land_tips .head_land > img {
    width: 1.5rem;
    height: auto;
}

.land_tips .land_content > a {
    display: block;
    cursor: pointer;
    font-size: 1.5rem;
    line-height: 2rem;
    color: #666;
    margin-top: 0.5rem;
}

.land_tips .land_content .denglu {
    margin-top: 0;
}

.land_tips .land_content > p {
    color: #666;
    text-align: left;
    margin: 0.3rem;
    font-size: 1.167rem;
}

.land_tips .head_land > a:hover {
    color: #666;
}

.land_tips .land_content {
    text-align: center;
}

.land_tips .response {
    text-align: right;
    color: #1296db;
    margin: 0.5rem;
}

.land_tips .response > span {
    display: inline-block;
    background: #1296db;
    color: #fff;
    padding: 0.2rem 0.5rem;
    cursor: pointer;
    border-radius: 3px;
}

.play_memory {
    position: absolute;
    left: 1em;
    bottom: 3.5em;
    color: #fff;
    display: none;
    font-size: 1rem;
}

.play_memory .restart {
    cursor: pointer;
    color: #0099e9;
}

/**播放按钮 */
.vjs-has-started .vjs-big-play-button {
    display: none !important;
}

/**进度条高度 */
.video-js .vjs-control-bar .vjs-progress-control .vjs-progress-holder {
    height: 0.5em !important;
}

.video-js .vjs-play-progress:before {
    font-size: 1em !important;
    position: absolute !important;
    right: -.5em !important;
    top: -.233333333em !important;
    z-index: 1;
}

/**播放器内手指鼠标 */
.video-js .vjs-tech {
    cursor: pointer;
}