ul, li, p {
    list-style: none;
    margin: 0;
    padding: 0;
    line-height: 100%;
}

.clear {
    clear: both;
}

.container1200 {
    position: relative;
    width: 1200px;
    margin: 0 auto;
}

.course_list {
    position: relative;
    margin-top: 60px;
}

.course_list:before {
    content: '';
    width: 1px;
    height: 100%;
    background-color: #e6e9ef;
    position: absolute;
    left: 50%;
    top: 0;
}

.course_list li {
    position: relative;
    padding: 30px 30px 0 30px;
    width: 460px;
    background-color: #ffffff;
    border: solid 1px #e6e9ef;
    margin-top: 80px;
}

.course_list li:first-child {
    margin-top: 0
}

.course_list li:nth-child(odd) {
    text-align: right;
    float: left;
}

.course_list li:nth-child(even) {
    text-align: left;
    float: right;
}

.course_list li:nth-child(odd):before {
    content: '';
    display: block;
    position: absolute;
    background: url(/static/v2020/pc/img/course_l.png);
    width: 85px;
    height: 9px;
    right: -85px;
    top: 0;
}

.course_list li:nth-child(even):before {
    content: '';
    display: block;
    position: absolute;
    background: url(/static/v2020/pc/img/course_r.png);
    width: 84px;
    height: 9px;
    left: -84px;
    top: 0;
}

.course_list li .font-style-h3 {
    font-size: 18px;
    margin-bottom: 20px;
    line-height: 100%;
    padding: 0
}

.course_list li .font-style-h5 {
    font-size: 16px;
    font-weight: normal;
    line-height: 30px
}

.course_list li p {
    font-size: 14px;
    color: #9bacb9;
    line-height: 30px;
    padding-bottom: 24px
}

@media screen and (max-width: 768px) {
    .course_list {
        margin-top: 10px;
    }
    .container1200 {
        width: 100%;
        padding: 0;
    }
    .course_list li{
        width: 80%;
        text-align: center !important;
        float: left !important;
        margin: 10px;
    }
    .course_list li:nth-child(odd):before {
        content: none;
        display: none;
    }
    .course_list li:nth-child(even):before {
        content: none;
        display: none;
    }
    .course_list:before{
        content: none;
        display: none;
    }

}