.wotu-banner {
    background-image: url(../images/advanceBGI.jpg);
}

.wotu-content {
    padding: 0 40px;
}

.changeType {
    border-bottom: 1px solid #eee;
}

.changeType li {
    display: inline-block;
    padding: 0 30px;
}

.changeType li a {
    display: inline-block;
    font-size: 18px;
    color: #252b3a;
    padding: 20px 0;
    border-bottom-color: transparent;
}

.changeType li a.active {
    font-weight: bold;
    border-bottom: 3px solid #c7000b;
}

/* 学习Track */
.track_content {
    margin: 72px 0 36px;
}

.track_content .col-md-3 {
    display: inline-block;
    width: 25%;
    position: relative;
}

.col-md-3:not(:last-of-type)::after {
    content: '';
    position: absolute;
    right: -50px;
    top: 70px;
    width: 100px;
    display: inline-block;
    height: 8px;
    background: url(../images/dash-dot.png) no-repeat center;
}

.track_video {
    width: 140px;
    height: 140px;
    margin: 0 auto;
    position: relative;
}

.track_video img {
    margin-top: 50%;
    transform: translateY(-50%);
}

.track_play {
    display: inline-block;
    width: 35px;
    height: 35px;
    background: url(../images/icon-trackplay.svg) no-repeat center;
    background-size: contain;
    box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.50);
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.track_title {
    font-size: 18px;
    font-weight: bold;
    margin-top: 24px;
    margin-bottom: 16px;
}

.track_border {
    width: 32px;
    height: 3px;
    background-color: #adb0b8;
    margin: 0 auto;
    transition: all 0.5s;
}

.track_content .col-md-3 .track_box:hover .track_title {
    color: #c7000b;
}

.track_content .col-md-3 .track_box:hover .track_border {
    width: 40px;
    background-color: #c7000b;
}

.track_star {
    margin-top: 24px;
    margin-bottom: 12px;
}

.track_star li {
    display: inline-block;
}

.track_star li img {
    width: 16px;
    height: 16px;
    margin-right: 4px;
}

.track_num {
    color: #575d6c;
    font-size: 14px;
}

/* 全部教程 */
.pc_video {
    display: flex;
    align-items: flex-start;
    margin-bottom: 36px;
}

.mb_track,
.mb_video {
    display: none;
}

.left_content {
    width: 896px;
    text-align: left;
    margin-right: 16px;
}

.video_nav {
    padding: 32px 0;
}

.video_nav .tags+.tags {
    margin-top: 20px;
}

.video_nav span {
    font-size: 14px;
}

.video_nav .tags .selectBtn {
    display: inline-block;
    padding: 7px 16px;
    line-height: 18px;
    border: 1px solid #adb0b8;
}

.video_nav .tags .selectBtn:not(:last-child) {
    margin-right: 12px;
}

.video_nav .tags .selectBtn:hover {
    cursor: pointer;
}

.video_nav .tags .selectBtn.active {
    color: #c7000b;
    border-color: #c7000b;
}

.video_nav .tags .videoSearch {
    float: right;
    position: relative;
}

.videoSearch input {
    width: 200px;
    height: 32px;
    border: 1px solid #adb0b8;
    padding: 6px 10px;
}

.videoSearch input:focus {
    border-color: #575d6c;
}

.videoSearch .clearIcon {
    position: absolute;
    top: 10px;
    right: 18px;
    background: url(../images/clear.png) no-repeat center;
    background-size: contain;
}

.videoSearch .clearIcon:hover {
    cursor: pointer;
}

.videoSearch .searchIcon {
    position: absolute;
    width: 12px;
    height: 12px;
    top: 10px;
    right: 5px;
    background: url(../images/search.png) no-repeat center;
    background-size: contain;
}

.viedo_menu {
    display: flex;
    flex-flow: row wrap;
    justify-content: flex-start;
    align-items: center;
    padding-top: 32px;
}

.video_cards {
    display: inline-block;
    width: 288px;
    margin-bottom: 16px;
    box-shadow: 0 1px 4px 0 rgba(0, 0, 0, 0.10);
    border-radius: 2px;
    margin-right: 16px;
}

.video_cards:hover {
    box-shadow: 0 6px 12px 0 rgba(0, 0, 0, 0.10);
}

.video_cards:nth-child(3n+3) {
    margin-right: 0;
}

.video_cards .video_img {
    position: relative;
}

.video_img img {
    width: 100%;
    height: 140px;
    vertical-align: middle;
}

.video_img .video_times {
    position: absolute;
    bottom: 4px;
    right: 4px;
    color: #fff;
}

.video_des {
    padding: 20px;
    height: 146px;
}

.video_des .video_title {
    font-size: 16px;
    font-weight: bold;
    height: 44px;
    line-height: 22px;
    display: -webkit-box;
    overflow: hidden;
    text-overflow: ellipsis;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.video_cards:hover .video_title {
    color: #c7000b;
}

.video_des .video_tags {
    margin: 12px 0;
    height: auto;
}

.video_des .video_tags span {
    font-size: 12px;
    color: #575d6c;
    border: 1px solid #adb0b8;
    padding: 0 4px;
    border-radius: 2px;
    margin-right: 4px;
}

.video_des .video_bottom {
    display: flex;
    justify-content: space-between;
    margin-top: 10px;
}

.video_des .viedo_nums {
    color: #575d6c;
    font-size: 14px;
}

.video_des ul li {
    display: inline-block;
}

.video_des ul li img {
    width: 14px;
    height: 14px;
    margin-right: 4px;
    vertical-align: middle;
}

.right_content {

}
.right_help {
    padding: 0 20px;
    margin: 32px 0;
    background-color: #f5f5f6;
}
.xtxsp_div{
    margin-top: 50px;
    height: 48px;
    margin-left: 0px;

}
.xtxsp_div a{
    height: 66px;
    font-size: 24px;
    color: #252B3B;
    letter-spacing: 0;
    line-height: 52px;
    text-align: center;
    margin-left: -40px;
    font-weight: bold;
}
.red_xtx{
    float: left;
    height: 24px;
    width: 5px;
    margin-top: 14px;
    background: #C7000B;
    border-radius: 1px;
}


 .img_xtx {
    float: right;
    width: 24px;
    height: 24px;

}
.play_icon {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: inline-block;
    width: 32px;
    height: 32px;
    background: url(./images/play.svg) no-repeat center;
    background-size: cover;
    /*background: #526ECC;*/
}
.right_content .help_img {
    display: inline-block;
    width: 248px;
    height: 180px;
    background: url(../images/advanceHelp.png) no-repeat center;
    background-size: contain;
}

/* 分页 */
.contentBottom {
    width: 100%;
    text-align: center;
    margin-top: 32px;
}

.contentBottom a {
    font-size: 12px;
    user-select: none;
}

.totalNum {
    margin-right: 10px;
}

.pageNo,
.prePage,
.nextPage {
    padding: 5px 6px;
}

.pageNo {
    margin: 0 1px;
}

.pageNo.active,
.pageNo:hover {
    background-color: #dfe1e6;
}

.prePage,
.nextPage {
    border: 1px solid #adb0b8;
    padding: 5px 12px;
}

.prePage:hover,
.nextPage:hover {
    background-color: #f5f5f6;
}

.pageNo:active,
.prePage:active,
.nextPage:active {
    color: #c7000b;
}

.prePage.disabled,
.nextPage.disabled {
    cursor: not-allowed;
}

.prePage.disabled:hover,
.nextPage.disabled:hover {
    background-color: transparent;
}

.prePage.disabled:active,
.nextPage.disabled:active {
    color: #252b3a;
}

@media (max-width: 768px) {
    .mb_bannerBgi {
        background-image: url(../images/advanceBGI_mb.png);
    }

    .wotu-content {
        background-color: #f8f8f8;
        padding: 0;
        padding-bottom: 15px;
        min-height: 0;
    }

    .changeType {
        border-color: #DFE1E6;
    }

    .changeType li {
        padding: 0;
    }

    .changeType li+li {
        margin-left: 16px;
    }

    .changeType li a {
        font-size: 14px;
        padding: 17px 6px 12px;
    }

    .track_content {
        margin: 0;
    }

    .pc_track,
    .pc_video {
        display: none;
    }

    .mb_track,
    .mb_video {
        display: block;
        width: 100%;
    }

    .mb_track {
        padding: 0 15px;
    }

    .track_card {
        background-color: #fff;
        text-align: left;
    }

    .track_card {
        margin-top: 8px;
    }

    .track_box {
        padding: 6px 15px;
        display: flex;
    }

    .track_video {
        display: inline-block;
        width: 64px;
        height: 64px;
        margin: 0;
        vertical-align: top;
        margin-right: 15px;
        flex-shrink: 0;
        align-self: center;
    }

    .track_video img {
        margin: 0;
        transform: none;
    }

    .track_play {
        width: 20px;
        height: 20px;
    }

    .track_right {
        display: inline-block;
    }

    .track_title {
        font-size: 14px;
        line-height: 18px;
        margin-top: 12px;
        margin-bottom: 8px;
    }

    .track_num {
        font-size: 12px;
        line-height: 16px;
    }

    .video_content {
        margin: 0;
    }

    .viedo_menu {
        padding: 0 15px;
        justify-content: space-between;
    }

    .video_cards {
        width: calc((100% - 10px) / 2);
        height: 118px;
        margin: 0;
        margin-top: 8px;
        background-color: #fff;
    }

    .video_cards .video_img,
    .video_cards .video_img img {
        height: 70px;
    }

    .video_cards .video_img img {
        background-color: rgba(0, 0, 0, 0.50);
    }

    .video_img .video_play {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        width: 32px;
        height: 32px;
        background: url(../images/icon-trackplay.svg) no-repeat center;
        background-size: cover;
    }

    .video_img .video_times {
        bottom: 4px;
        right: 4px;
        width: 50px;
        height: 18px;
        font-size: 12px;
        line-height: 18px;
        color: #fff;
    }

    .video_des {
        padding: 8px 8px 6px;
    }

    .video_des .video_title {
        font-size: 12px;
        height: 16px;
        line-height: 16px;
        white-space: nowrap;
        text-overflow: ellipsis;
        text-align: left;
    }

    .video_des .video_bottom {
        margin-top: 2px;
    }

    .video_des .viedo_nums {
        font-size: 12px;
        line-height: 16px;
    }

    .videos_more,
    .videos_nomore {
        width: 100%;
        text-align: center;
        margin: 18px 0;
        font-size: 12px;
        line-height: 16px;
    }

    .videos_more {
        color: #526ecc;
        cursor: pointer;
    }

    .icon_more {
        display: inline-block;
        width: 18px;
        height: 12px;
        background: url(../images/more.svg) no-repeat center;
        background-size: cover;
        margin-left: -6px;
        vertical-align: middle;
    }

    .help_techinique {
        display: inline-block;
        width: 100%;
        height: 120px;
        background: url(../images/advanceHelp_mb.png) no-repeat center;
        background-size: cover;
        position: relative;
    }

    .help_content {
        position: absolute;
        top: 50%;
        left: 30px;
        transform: translateY(-50%);
    }

    .help_content span {
        font-size: 24px;
        line-height: 32px;
        font-weight: bold;
    }

    .help_line {
        display: inline-block;
        width: 4px;
        height: 20px;
        background-color: #c7000b;
        margin-right: 5px;
        vertical-align: text-bottom;
    }



}