.info_left{float:left;width:800px;color:#666;overflow:hidden}.info_right{float:right;width:375px}.course_list ul{width:790px}.course_list li{background-color:#fff;margin-bottom:18px}.course_list li:hover{-moz-box-shadow:5px 5px 5px #ddd;box-shadow:5px 5px 5px #ddd}.course_list li a{display:block;height:190px;padding:23px 12px 27px 18px}.course_list a h3{font-size:16px;color:#333}.course_list a span{display:block}.course_list a div{height:125px;width:508px;overflow:hidden;line-height:25px;font-size:14px}.course_list a time{width:508px;display:block;font-size:14px}.course_list a h3{font-size:17px;color:#333;font-weight:400}.content{overflow:hidden}.r_wrap{background-color:#fff;padding-left:30px;overflow:hidden;padding-bottom:22px;margin-bottom:14px;color:#666}.r_wrap .ppt_list{width:auto}.r_wrap .ppt_list li{padding:0;width:297px}.r_wrap .ppt_list li img{width:297px;height:198px}.r_wrap .ppt_list li .mark{height:198px}.r_wrap .ppt_list li .down{top:38px}.r_wrap .ppt_list li .collect{top:106px}.r_wrap a{color:#666;font-size:15px}.lm_title{font-size:20px;height:30px;line-height:30px;overflow:hidden;padding:8px 0 9px 0;margin-top:11px;margin-bottom:4px}.lm_title i{height:30px;width:29px;display:inline-block;position:absolute}.lm_title .nav_ico{background:url(/Images/mike.png) no-repeat -102px -230px}.lm_title .favoriate_ico{background:url(/Images/mike.png) no-repeat -37px -230px}.lm_title .today_update_ico{background:url(/Images/mike.png) no-repeat -127px -230px}.lm_title span{margin-left:35px}.lm_nav{width:100%}.lm_nav li{padding:2px 20px 6px 0;line-height:22px;float:left;text-align:center}.r_wrap .d_wrap{margin-top:25px;overflow:hidden}.r_wrap .down{width:209px;height:62px;float:left;background:url(/Images/mike.png) no-repeat -181px -146px;cursor:pointer}.r_wrap .r_collect{width:62px;height:62px;float:left;background:url(/Images/mike.png) no-repeat -747px -33px;margin-left:30px;cursor:pointer}.r_wrap .r_collect:hover{background:url(/Images/mike.png) no-repeat -668px -33px}.dt_wrapper{margin-top:30px}