#course_side h3{margin-bottom:20px;color:#222;font-size:24px;font-weight:700}#course_side .side_main_box .side_main{margin-bottom:10px}#course_side .side_main_box .side_main h4{margin:0;width:100%;height:55px;line-height:55px;border:1px solid #41b971;color:#41b971;cursor:pointer}#course_side .side_main_box .side_main h4.active,#course_side .side_main_box .side_main h4.hover{background:#41b971;color:#fff}#course_side .side_main_box .side_main .side_sub_box{background:#fafafa;display:none}#course_side .side_main_box .side_main .side_sub{width:100%;height:45px;padding:0;text-align:left}#course_side .side_main_box .side_main .side_sub a{display:inline-block;left:0;top:0;width:100%;height:100%;line-height:45px;text-indent:20px;color:#444;border-left:3px solid #fff}#course_side .side_main_box .side_main .side_sub a:hover,#course_side .side_main_box .side_main .side_sub a.active{background:#e6f6ec;border-left:3px solid #41b971}