*,ul,li,a{
	margin: 0;
	padding: 0;
	list-style: none;
	text-decoration: none;
}
/*公司简介*/
.about_introduce .content{color: #999;line-height: 2em;text-indent: 2em;margin-top: 2em;margin-bottom: 2em;text-align: left;}
.about_layout .con img{width: 100%;}
.about_layout .con .img2{width: 25%;}
video{width: 100%;}

/*发展历程*/
.about_course .list{overflow: hidden;}
.about_course .list li{float: left;}
.about_course .content{padding-left: 5px;}
.about_course .list{border-left: 1px solid #ff9900;padding-bottom: 20px;}
.about_course .list_f{position: relative;}
.about_course .list_f .axle{position: absolute;
top: 3px;left: -11px;z-index: 9;}
.about_course .list_f .axle img{width: 25px;height: 25px;}
.about_course .list .text{padding: 10px;background: #f5f5f5;font-size: 16px;color: #555;width: 95%;margin-left: 20px;
color: #999;line-height: 2em;padding-left: 2em;}
.about_course .list .year{font-size: 22px;color: #ff9900;font-weight: bold;width: 200px;margin-left: 20px;margin-bottom: 10px;}
.about_course .list{text-align: left;}

.about_layout .con{text-align: left;}
/*企业荣誉*/
.about_encourage{width: 100%;background: red;margin-top: 40px;}
.about_encourage li{float: left;
width: 260px;
    height: 200px;
    border: solid 1px #e9e9e9;
    transition: all 1s ease 0s;
    float: left;
    margin-left: 20px;
    box-sizing: border-box;
    position: relative;
    margin-bottom: 20px;
    }
.about_encourage li img{width: 260px;height: 200px;}
/*产品专利*/
.about_responsibility{width: 100%;background: red;margin-top: 40px;}
.about_responsibility li{float: left;
width: 260px;
    height: 400px;
    border: solid 1px #e9e9e9;
    transition: all 1s ease 0s;
    float: left;
    margin-left: 20px;
    box-sizing: border-box;
    position: relative;
    margin-bottom: 20px;}
.about_responsibility li img{width: 260px;height: 400px;}