.freeintroduction-top {
    width: 100%;
    height: 240px;
    overflow: hidden;
    background: url(../images/longVideo/04.png) no-repeat;
}

.freeintroduction-box {
    width: 100%;
    background-color: #F4F4F4;
    padding-left: 240px;
    padding-top: 30px;
    padding-bottom: 40px;
    display: flex;
}

.freeintroduction {
    margin-top: 68px;
}

.zhangjie {
    width: 100%;
    height: 60px;
    background-color: #fff;
    font-family: PingFang SC, PingFang SC;
    font-weight: 400;
    font-size: 16px;
    line-height: 40px;
    color: #1669E5;
    font-style: normal;
    text-transform: none;
    padding: 15px 240px;
}

.in {
    width: 35px;
    border-bottom: 2px solid #1669E5;
}

.jianjie {
    width: 1056px;
    min-height: 138px;
    font-family: PingFang SC, PingFang SC;
    font-weight: 400;
    font-size: 16px;
    color: #666666;
    line-height: 30px;
    text-align: left;
    font-style: normal;
    text-transform: none;
    background-color: #fff;
    padding: 30px;
    margin-top: 30px;
    margin-bottom: 10px;
}

.jianjie>span {
    width: 1005px !important;
    display: inline-block;
    overflow: hidden;

}

.detail_one {
    width: 1056px;
    padding: 30px;
    background-color: #fff;
    margin-bottom: 10px;
}

.title {
    /* width: 165px; */
    height: 22px;
    font-family: PingFang SC, PingFang SC;
    font-weight: bold;
    font-size: 16px;
    color: #333333;
    line-height: 30px;
    text-align: left;
    font-style: normal;
    text-transform: none;
}

.title-two {
    width: 1005px;
    /* height: 37px; */
    font-family: PingFang SC, PingFang SC;
    font-weight: 400;
    font-size: 12px;
    color: #666666;
    line-height: 20px;
    font-style: normal;
    text-transform: none;
    margin-top: 10px;
    margin-bottom: 10px;
}

.dfc {
    height: 44px;
    font-family: PingFang SC, PingFang SC;
    font-weight: 400;
    font-size: 16px;
    color: #666666;
    line-height: 44px;
    text-align: left;
    font-style: normal;
    text-transform: none;
    display: flex;
    justify-content: space-between;
    padding-left: 10px;
    padding-right: 10px;
    cursor: pointer;
}

.dfc:hover {
    background-color: #fef3f3;
    color: red;
}

.buy_box {
    width: 1056px;
    background-color: #fff;
    padding: 30px;

}

.buy_title {
    height: 22px;
    font-family: PingFang SC, PingFang SC;
    font-weight: bold;
    font-size: 16px;
    color: #333333;
    line-height: 30px;
    text-align: center;
    font-style: normal;
    text-transform: none;
}

.gobuy {
    width: 160px;
    height: 46px;
    background-color: #1669E5;
    font-family: PingFang SC, PingFang SC;
    font-weight: 400;
    font-size: 18px;
    color: #FFFFFF;
    line-height: 40px;
    text-align: center;
    font-style: normal;
    text-transform: none;
    border-radius: 40px;
    margin: 20px auto 30px;
}

.line {
    border: 2px dotted #333333;
    margin-bottom: 40px;
}

.study {
    width: 361px;
    height: 460px;
    background-color: #fff;
    padding: 20px 30px;
}

.right {
    margin-left: 48px;
    font-family: PingFang SC, PingFang SC;
    font-weight: bold;
    font-size: 16px;
    color: #333333;
    line-height: 30px;
    font-style: normal;
    text-transform: none;
}

.btn {
    width: 301px;
    height: 46px;
    background-color: #1669E5;
    border-radius: 26px;
    font-family: PingFang SC, PingFang SC;
    font-weight: 400;
    font-size: 18px;
    color: #FFFFFF;
    line-height: 32px;
    text-align: center;
    font-style: normal;
    text-transform: none;
    margin: 20px 0px;
}

.course,
.studydetail {

    font-family: PingFang SC, PingFang SC;
    font-weight: 400;
    font-size: 12px;
    color: #666666;
    line-height: 20px;
    text-align: left;
    font-style: normal;
    text-transform: none;
    margin-bottom: 30px;
    margin-top: 10px;
}

.aboutcourse {
    margin-top: 30px;
    font-family: PingFang SC, PingFang SC;
    font-weight: bold;
    font-size: 16px;
    color: #333333;
    line-height: 30px;
    text-align: left;
    font-style: normal;
    text-transform: none;
}

.aboutcourse ul li {
    display: flex;
    align-items: center;
    margin-top: 15px;
}

.course_box {
    margin-left: 10px;
    height: 80px;
    overflow: hidden;
}

.courseone {
    width: 234px;
    min-height: 25px;
    max-height: 25px;
    font-family: PingFang SC, PingFang SC;
    font-weight: 400;
    font-size: 18px;
    color: #484848;
    line-height: 25px;
    text-align: left;
    font-style: normal;
    text-transform: none;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    margin-bottom: 3px;

}

.courseone:hover {
    overflow: visible;
    white-space: normal;
    max-height: 52px;
}

.playimg {
    width: 13px;
    height: 13px;
}

.coursetwo {
    height: 20px;
    font-family: PingFang SC, PingFang SC;
    font-weight: 400;
    font-size: 14px;
    color: #707070;
    line-height: 20px;
    text-align: left;
    font-style: normal;
    text-transform: none;
    margin-bottom: 7px;
}

.coursetime {
    width: 50px;
    height: 14px;
    font-family: PingFang SC, PingFang SC;
    font-weight: 400;
    font-size: 10px;
    color: #FFFFFF;
    line-height: 14px;
    text-align: center;
    font-style: normal;
    text-transform: none;
    background-color: #484848;
    padding: 0 4px;
}

.bread {
    margin-left: 240px;
    margin-top: 20px;
    margin-bottom: 30px;
    height: 17px;
    font-family: PingFang SC, PingFang SC;
    font-weight: 400;
    font-size: 12px;
    color: #999999;
    line-height: 17px;
    text-align: left;
    font-style: normal;
    text-transform: none;
}

.course_title {
    height: 42px;
    font-family: PingFang SC, PingFang SC;
    font-weight: 400;
    font-size: 30px;
    color: #FFFFFF;
    line-height: 42px;
    text-align: left;
    font-style: normal;
    text-transform: none;
    margin-left: 240px;

}

.course_title span {
    height: 22px;
    font-family: PingFang SC, PingFang SC;
    font-weight: 400;
    font-size: 16px;
    color: #FFFFFF;
    line-height: 0px;
    text-align: left;
    font-style: normal;
    text-transform: none;
    margin-left: 790px;
}

.teacher {
    margin-left: 240px;
    margin-top: 23px;
    display: flex;
}

.teacher_detail {
    margin-left: 10px;
}

.name {
    height: 28px;
    font-family: PingFang SC, PingFang SC;
    font-weight: bold;
    font-size: 20px;
    color: #FFFFFF;
    line-height: 28px;
    text-align: left;
    font-style: normal;
    text-transform: none;
}

.zhiwei {
    height: 22px;
    font-family: PingFang SC, PingFang SC;
    font-weight: bold;
    font-size: 16px;
    color: #FFFFFF;
    line-height: 0px;
    text-align: left;
    font-style: normal;
    text-transform: none;
    margin-top: 20px;
    display: flex;
}

.zhiwei .spanbox {
    /* width: 978px; */
    font-family: PingFang SC, PingFang SC;
    font-weight: 400;
    font-size: 16px;
    color: #FFFFFF;
    line-height: 0px;
    text-align: left;
    font-style: normal;
    text-transform: none;
    margin-left: 2px;
    display: flex;
    flex-wrap: wrap;
}

.courseimg {
    width: 50px;
    height: 50px;
    border-radius: 50%;
}

.phone_freeintroduction {
    display: none;
}

@media (max-width: 750px) {
    /* .freeintroduction {
        margin-top: 0.44rem;
    }

    .freeintroduction-top {
        width: 100%;
        height: 2.1rem;
        overflow: hidden;
        background: url(../images/longVideo/04_phone.png) no-repeat;
    } */

    /* .course_title {
        height: 0.24rem;
        font-family: PingFang SC, PingFang SC;
        font-weight: 400;
        font-size: 0.2rem;
        color: #FFFFFF;
        line-height: 0rem;
        text-align: left;
        font-style: normal;
        text-transform: none;
        margin-left: 0.25rem;
        margin-top: 1.3rem;
    }

    .bread {
        display: none;
    }

    .course_title>span {
        display: block;
        height: 22px;
        font-family: PingFang SC, PingFang SC;
        font-weight: 400;
        font-size: 0.13rem;
        color: #FFFFFF;
        line-height: 0px;
        text-align: left;
        font-style: normal;
        text-transform: none;
        margin-left: 0rem;
        margin-top: 0.3rem;
    }
    .teacher{
        display: none;
    } */
    .phone_freeintroduction {
        display: block;
        width: 100%;
    }

    .freeintroduction {
        display: none;
    }

    .phone_freeintroduction-top {
        width: 100%;
        margin-top: -0.4rem;
    }

    .phone_freeintroduction-top .bgimg {
        width: 100%;
        height: 2.7rem;
    }

    .fhimg {
        position: absolute;
        top: 0.7rem;
        left: 0.2rem;
        width: 0.12rem;
        height: 0.18rem;
    }

    .phone_name {
        font-family: PingFang SC, PingFang SC;
        font-weight: 400;
        font-size: 0.19rem;
        color: #FFFFFF;
        position: absolute;
        top: 1.4rem;
        left: 0.2rem;
    }

    .phone_nandu {
        font-family: PingFang SC, PingFang SC;
        font-weight: 400;
        font-size: 0.12rem;
        color: #FFFFFF;
        position: absolute;
        top: 1.8rem;
        left: 0.2rem;
    }

    .phone_bar {
        font-family: PingFang SC, PingFang SC;
        font-weight: 400;
        font-size: 0.14rem;
        color: #999999;
        display: flex;
        align-items: center;
        justify-content: space-around;
        height: 0.6rem;
        padding-left: 0.5rem;
        padding-right: 1.5rem;
        padding-top: 0.1rem;
        background-color: white;
        border-bottom: 1px solid #cccccc;
    }

    .phone_bar>div {
        padding: 0.02rem 0.02rem;
    }

    .ac {
        font-family: PingFang SC, PingFang SC;
        font-weight: bold;
        font-size: 0.14rem;
        color: #000000;
        border-bottom: 2px solid #1669E5;
        text-align: center;
        padding-bottom: 0.03rem;
    }

    .phone_jianjie {
        background-color: #F8FAFC;
    }

    .phone_jianjie>div {
        margin-bottom: 0.1rem;
        background-color: #fff;
        padding: 0.09rem 0.15rem;
        font-family: PingFang SC, PingFang SC;
        font-weight: bold;
        font-size: 0.15rem;
        color: #000000;
    }

    .phone_jianjie_text {
        font-family: PingFang SC, PingFang SC;
        font-weight: 400;
        font-size: 0.13rem;
        color: #666666;
        margin-top: 0.08rem;
        width: 100%;
        overflow: hidden;
    }

    .phone_teacher_detail {
        display: flex;
        align-items: center;
        margin-top: 0.1rem;
    }

    .phone_teacher_detail img {
        border-radius: 50%;
        overflow: hidden;
        margin-right: 0.08rem;
        width: 0.42rem;
        height: 0.42rem;
    }

    .main_teacher {
        font-family: PingFang SC, PingFang SC;
        font-weight: 400;
        font-size: 0.09rem;
        color: #666666;
        margin-top: 0.03rem;
    }

    .phone_teacher_text {
        font-family: PingFang SC, PingFang SC;
        font-weight: 400;
        font-size: 0.11rem;
        color: #666666;
        padding: 0.08rem 0.12rem;
        background-color: #F8F8F8;
        margin-top: 0.09rem;
        margin-bottom: 0.05rem;
    }

    .phone_group {
        font-family: PingFang SC, PingFang SC;
        font-weight: 400;
        font-size: 0.13rem;
        color: #666666;
        margin-top: 0.1rem;
        margin-bottom: 0.16rem;
    }

    .phone_study {
        font-family: PingFang SC, PingFang SC;
        font-weight: 400;
        font-size: 0.13rem;
        color: #666666;
        margin-top: 0.1rem;
        margin-bottom: 0.05rem;
    }

    .phone_tuijian_ul {
        padding: 0.15rem;
    }

    .phone_tuijian_ul li {
        display: flex;
        margin-bottom: 0.15rem;
    }

    .phone_tuijian_ul li img {
        width: 1.2rem;
        height: 0.87rem;
        margin-right: 0.14rem;
    }

    .course_box {
        margin-left: 0px;
        height: 0.87rem;
        overflow: hidden;
    }

    .courseone {
        font-family: PingFang SC, PingFang SC;
        font-weight: 400;
        font-size: 0.14rem;
        color: #484848;
        max-height: 0.4rem;
        overflow: hidden;
        width: 3rem;
        min-height: 0.2rem;
        margin-bottom: 0rem;
    }

    .coursetwo {
        font-family: PingFang SC, PingFang SC;
        font-weight: 400;
        font-size: 0.11rem;
        color: #707070;
        margin-top: 0rem;
        margin-bottom: 0.06rem;
        height: 0.15rem;
        line-height: 0.15rem;
    }

    .coursetime {
        width: 0.4rem;
        height: 0.13rem;
        background-color: #484848;
        border: 0.01rem;
        font-family: PingFang SC, PingFang SC;
        font-weight: 400;
        font-size: 0.08rem;
        color: #FFFFFF;
        text-align: center;
        line-height: 0.13rem;
    }

    .phone_tuijian_title {
        margin-top: 0.15rem;
        margin-left: 0.15rem;
        font-family: PingFang SC, PingFang SC;
        font-weight: bold;
        font-size: 0.15rem;
        color: #000000;
        padding: 0 0.06rem;
    }

    .detail_one {
        width: 100%;
        padding: 0.15rem;
        background-color: #fff;
        margin-bottom: 0;
    }

    .title-two {
        display: none;
    }

    .title {
        height: 0.22rem;
        font-family: PingFang SC, PingFang SC;
        font-weight: bold;
        font-size: 0.16rem;
        color: #000000;
        line-height: 0.22rem;
        text-align: left;
        font-style: normal;
        text-transform: none;
    }

    .dfc {
        height: 0.4rem;
        font-family: PingFang SC, PingFang SC;
        font-weight: 400;
        font-size: 0.14rem;
        color: #666666;
        line-height: 0.4rem;
        text-align: left;
        font-style: normal;
        text-transform: none;
        display: flex;
        justify-content: space-between;
        padding-left: 0px;
        padding-right: 0px;
        cursor: pointer;
        border-bottom: 1px solid #cccccc;
    }

    .playimg {
        width: 0.13rem !important;
        height: 0.13rem !important;
        margin-right: 0.02rem !important;
    }

    .phone_footer {
        height: 0.7rem;
        background-color: #F8FAFC;
        display: flex;
        justify-content: center;
        align-items: center;
    }

    .phone_gobut {
        width: 3.05rem;
        height: 0.35rem;
        text-align: center;
        background-color: #1669E5;
        line-height: 0.35rem;
        font-family: PingFang SC, PingFang SC;
        font-weight: 400;
        font-size: 0.15rem;
        color: #FFFFFF;
        border-radius: 0.18rem;
    }

    .collect_text {
        font-family: PingFang SC, PingFang SC;
        font-weight: 400;
        font-size: 0.12rem;
        color: #666666;
        margin-right: 0.1rem;
    }

    .phone_collect img {
        width: 0.13rem;
        height: 0.13rem;
        margin-left: 0.05rem;
    }

    .phone_mulu {
        display: none;
    }

    .phone_tuijian {
        display: none;
    }

}