@charset "utf-8";

@media (max-width: 1300px) {
    /*小于1300时*/
    .teachingCourseware_video {
        margin: 0 0 0 50px;
    }

}

@media (max-width: 1000px) {
    /*小于1000时*/
    .course_video {
        float: none;
        margin: auto;
        /*margin-left: 0;*/
    }

    .teachingCourseware_video {
        float: none;
        margin: auto;
    }

    .left_img,
    .title_img {
        margin-top: 20px;
        margin-left: 0;
    }

    .courseTraining {
        margin-bottom: 50px;
    }

    .teachingCourseware_video,
    .course_video {
        margin: 20px auto;
    }

    .teachingCourseware {
        padding: 50px 0 100px;
    }

}

@media (max-width: 767px) {
    /*小于767时*/
    .course_video {
        width: 100%;
        height: auto;
        background: none;
        position: static;
        margin: auto;
        text-align: center;
    }

    .course_video video {
        width: 300px;
        height: auto;
        position: static;
        left: 0;
        top: 0;
        border-radius: 20px;
    }

    .teachingCourseware_video {
        width: 100%;
        height: auto;
        background: none;
        position: static;
        margin: auto;
        text-align: center;
    }

    .teachingCourseware_video video {
        width: 300px;
        height: auto;
        position: static;
        left: 0;
        top: 0;
        border-radius: 20px;
    }

    .left_img,
    .title_img {
        width: 160px;
        height: auto;
        margin-top: 0;
        margin-bottom: 0;
    }
    .title_img{
        margin-bottom: 15px;

    }

    .toTeaching .scrollimgs .bd li a span,
    .openClass .scrollimgs .bd li a span {
        font-size: 12px;
    }

    .course_txt p {
        font-size: 13px;
        line-height: 25px;
    }

    .courseTraining_btn a {
        font-size: 14px;
    }

    .courseTraining_btn {
        margin-top: 20px;
    }

    .teachingCourseware_video video,
    .course_video video {
        margin: 20px auto;
    }

    .teachingCourseware {
        padding: 30px 0 60px;
    }

    .toTeaching {
        background: #f9f1e2;
        padding: 30px 0 60px;
    }

    .openClass{
        padding: 30px 0 60px;
    }

}