.ab_sider{width:200px;float:left;}
.sdnav, .sdnav:visited{color:#000;display:inline-block;width:200px;border:2px solid #a8c51c;margin-bottom:8px;height:36px;line-height:36px;text-align:center; font-size:16px;border-radius: 4px;background:#fff;cursor:pointer;}
.sdnav:hover{border-color:#6B8003;}
.ab_main{width:750px;float:right;min-height:450px;}
.ab_main h1{width:700px;padding-bottom: 10px;font-size:18px;border-bottom: 1px solid #a8c51c;padding-left:50px;font-weight:bold;padding-top:10px;font-family: '微软雅黑',Arial, Helvetica, sans-serif;}
.article{font-size:14px;line-height:28px;padding:20px 10px 30px 10px;}
.article p{text-indent:2em;}
.article h3{width:100%;text-indent:2em;border-bottom:1px dotted #dfdfdf;padding-top:10px;font-weight:bold;}