.banner {
    width: 100%;
    background: url("../img/aboutus_img_01.jpg") no-repeat top center;
    background-size: 100% 100%;
    height: 500px;
    overflow: hidden;
    position: relative;
}

.banner_div {
    width: 1200px;
    overflow: hidden;
    margin: 0 auto;
    position: relative;
}

.banner_p {
    font-size: 30px;
    color: #fff;
      margin-top: 19%;
}

.banner_p2 {
    font-size: 30px;
    color: #fff;
}

.section {
    width: 100%;
    background: #fff;
    overflow: hidden;
    position: relative;
      padding: 20px 0 0 0;
}

.section_div {
    width: 1200px;
    overflow: hidden;
    position: relative;
    margin: 0 auto;
}

.section_div_top {
    width: 100%;
    overflow: hidden;
}
.course_div_left_pp {
       height: 100%;
    width: 1px;
    position: absolute;
    border-left: 2px dashed #dedede;
    left: 71px;    margin-top: 30px;
}
.section_divdiv_bottom {
    width: 100%;
    overflow: hidden;
    position: relative;
    padding-bottom: 120px;
}

.divdiv_bottom_left {
    width: 510px;
    float: left;
    font-size: 14px;
    color: #333333;
    line-height: 26px;
}

.divdiv_bottom_h4 {
    font-size: 24px;
    color: #333333;
    font-weight: normal;
}

.divdiv_bottom_p {
    margin-top: 20px;
}

.divdiv_bottom_right {
    display: block;
    float: right;

}


.course {
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
    background: #f9f9f9;
    padding: 66px 0 60px 0;
}

.course_div {
    width: 1200px;
    overflow: hidden;
    position: relative;
    margin: 0 auto;
}

.course_h4 {
    padding-bottom: 18px;
    border-bottom: 1px solid #d9d9d9;
    font-size: 30px;
    color: #333333;
    font-weight: normal;
}
.course_div_left{
    width: 600px;
    float: left;
    overflow: hidden;
}
.course_left {
    margin-top: 30px;
    float: left;
    overflow: hidden;
}

.course_left_p {
    float: left;
    font-size: 20px;
    color: #666666;
}

.course_ul {
    float: left;
    font-size: 15px;
    line-height: 40px;
	width:500px;
}

.course_li {
    color: #999999;
    overflow: hidden;
    margin-left: 20px;
    position: relative;
}

.course_li_p {
    float: left;
    margin-left: 20px;
    color: #333;
}

.course_i {
    width: 10px;
    height: 10px;
    display: inline-block;
    background: url("../img/ul_dian_03.png") no-repeat center;
    background-size: 100% 100%;
    vertical-align: middle;
    float: left;
    margin-top: 10px;
        z-index: 11111111;
    position: absolute;
    top: 5px;
}
.course_div_right{
    float: right;
	width: 600px;
}