.help{width: 1200px; height: auto; margin: 20px auto;  background: #fff; overflow: hidden;}

/*左导航*/
.left_nav{width: 250px; height: auto; float: left; overflow: hidden; }
.left_nav li{display: block; height: 60px; border-bottom: 1px solid #e5e5e5; border-top: 1px solid #FFF; }
.left_nav li a{display: block; height: 60px; text-align: center; font: 400 14px/60px "Microsoft YaHei"; color: #000; border-right: 1px solid #e5e5e5; overflow:hidden;}
.left_nav li.on a, .left_nav li.on a:hover{color: #000;  font-weight: bold; border-left: 5px solid #2dbb55;}
.left_nav li a:hover{text-decoration: none; color: #000;border-left: 5px solid #2dbb55;}
.left_nav li.title a{ color: #000; background:#2dbb55; font-size:18px; border-right: 1px solid #e5e5e5; overflow:hidden;}

/*右内容*/
.right_con{width: 950px; min-height:500px; float: left; background: #fff; padding: 20px;}
/*标题*/
.right_con h1{height: 38px; margin-bottom: 15px; border-bottom: 2px solid #2dbb55; text-align: left; font: 700 20px/25px "Microsoft YaHei","微软雅黑",Arial,"宋体"; color: #000;}

/*内容*/
.textbox{height: auto; font-size: 14px; overflow: hidden;}
.textbox p{margin-top:12px; text-indent: 2em; line-height: 30px;}
.textbox img{ max-width:100%;}


@media screen and (max-width: 767px) {
.help{width: 100%; margin:0;}
.left_nav{ width: 100%;}
.left_nav li{ height:40px; width:50%; float:left;}
.left_nav li.title{ display:none;}
.left_nav li a{ height:40px; line-height:40px;}


.right_con{ width:100%; padding:10px; border-top:5px solid #e9ecef; min-height:400px;}
.textbox p{ text-indent:0; margin:0 0 10px 0;}






}