h1{
		font-size: 22px;
		margin-bottom:15px;
	}
	h2{
		font-size: 20px;
		margin-bottom:12px;
	}
	h3{
		font-size: 18px;
		margin-bottom:10px;
	}
	h4{
		font-size: 16px;
		margin-bottom:8px;
	}
	h5{
		font-size: 14px;
		margin-bottom:5px;
	}
	
	.mheader{
		overflow: hidden;
		padding: 20px;
		background: #efefef;
	}
	.mheader h1{
		font-size: 18px; text-align: center;
	}
	.mmenu{
		overflow: hidden; /*padding: 10px;*/
	}
	.mmenu ul{
		overflow: hidden; 
		/*border: 1px solid #999;*/
		border-top: none;
		min-height: 360px;
		background: #fff;
		box-shadow: #999 1px 2px 1px;
	}
	.mmenu ul li{
		float: left;
		padding: 10px 15px; 
		box-shadow: #999 3px 3px 5px;
	}
	.mmenu dl{
		float: left; background: #fff; width: 33%; height:360px; overflow: auto;  text-align: center;
		margin-bottom:2px; margin-right: 2px;
	}
	.mmenu dl dt{
		font-size: 14px; line-height: 36px; 
	}
	.mmenu dl dd{
		line-height: 24px;

	}
	
	.contents{
		background: #fff;
		padding: 20px;
		font-size: 16px;
		margin: 10px auto;
		line-height: 1.6em;
		/*padding-left: 180px;*/
	}
	#buy-course-tip{
		padding: 50px 16px;
		margin: 30px 0px;
		background-color: #eee;
		text-align: center;
		font-size: 20px;
		color: #ec554a;
	}
	.contents a{
		color: #007dbb;
	}
	.contents img{
		max-width: 100%;
	}
	.contents h2{
		margin: 15px auto;
		font-size: 28px;
		line-height: 1.6;	
		background: #d1d1d126;
	}
	.contents h3{
		margin: 12px auto;
		font-size: 24px;
		line-height: 1.6;
		background: #d1d1d126;
	}
	.contents h4{
		margin: 8px auto;
		font-size: 20px;
		line-height: 1.6;
		background: #d1d1d126;
	}
	.contents ul{
		list-style: disc;
		padding-left: 20px;
	}
	.contents ol{
		list-style:decimal;
		padding-left: 20px;
	}
	.contents table{
		margin: auto;
		max-width: 100%;
		border-collapse:collapse;
	}
	.contents table td{
		padding:5px 5px;
		border:1px solid #ccc;
	}
	.contents table th{
		padding:7px 5px;
		border:1px solid #ccc;
		background-color:#EDEDED;
		color:#444;
	}
	.contents p.pb{
		padding-bottom: 12px;
	}
	.contents p.info-box{
	    padding: 10px;
    	margin: 6px auto;
    	color: #444;
    	background-color: #f8f8f8;
    	border: 1px solid #e1e1e1;
    	border-radius: 4px;
	}
	.contents code{
		    display: inline-block;
    font-size: 100%;
    color: rgb(51, 51, 51);
    font-family: "Helvetica Neue", 微软雅黑, "Microsoft Yahei", Helvetica, Arial, sans-serif;
    margin: auto 2px;
    padding: 0px 4px;
    border-width: 1px;
    border-style: solid;
    border-color: rgb(221, 221, 221);
    border-image: initial;
    background: rgb(246, 246, 246);
    border-radius: 2px;
	}

	/**iframe**/
	.leftMenu::-webkit-scrollbar
	{
	  width: 6px;
	  height: 10px;
	  background-color: #d1d1d1;
	}
	/*定义滚动条轨道 内阴影+圆角*/
	.leftMenu::-webkit-scrollbar-track
	{
	  -webkit-box-shadow: inset 0 0 6px rgba(0,0,0,0.3);
	  background-color: #fff;
	}
	/*定义滑块 内阴影+圆角*/
	.leftMenu::-webkit-scrollbar-thumb
	{
	  -webkit-box-shadow: inset 0 0 6px rgba(15,0,0,.3);
	  background-color: #d1d1d1;
	}
	.leftMenu::-webkit-scrollbar-thumb:hover{
	  background-color: #DDDBDA;
	}

	.leftMenu{
		position: fixed;
		z-index: 999;
		background: #fff;
		text-align: center;
		left: 0px;
		top: 100px;
		width: 180px;
		height:calc(100% - 100px);
		overflow-y:scroll;
		overflow-x:visible; 
		box-shadow: #999 2px 1px 2px;
	}
	.leftMenu dl dt a{
		color: #666; display: block;
	}
	.leftMenu dl dt a:hover{
		color: #fff; background: none !important; 
	}
	.leftMenu h3{
		height: 36px; line-height: 36px; background: #d1d1d1; margin: 0px !important; padding: 0px !important;
	}
	.leftMenu dl{
		overflow: hidden; margin-bottom: 5px;
	}
	.leftMenu dl dt{
		cursor: pointer;
		color: #666;
		font-size: 12px;  padding: 2px 0px;
		margin-top: 0px !important;
	}
	.leftMenu dl dt.on{
		background: #ee7100; color: #fff;
	}
	.leftMenu dl dt:hover{
		background: #ee7100; color: #fff;
	}
	.leftMenu dl dd {
		line-height: 24px; min-height: 24px; overflow: hidden; background: #f1f1f1; margin: 0px !important;
		text-align: left;
    	text-indent: 0.5em;
    	border-bottom: 1px dashed #d4d4d4;
    	color: #333;
	}
	.leftMenu dl dd a{
		color: #007dbb;
		font-size: 12px;
		font-weight: bold;
		/*color:#999;*/
	}
	.leftMenu dl dd a:hover{
		color: #333;
	}
	.leftMenu dl dd a:visited{
		color: #999;
	}
	.leftMenu .btn{
		position: absolute;
		width: 25px; height: 30px; display: block;
		right: 0px; top: 3px; 
		background: #999;
		text-align: center; line-height: 30px;
		z-index: 10;
	}