.about-main h2{font-size:42px;color:#20273c;font-weight:bold;font-family:'arial'}.about-main b{color:#4b4f5c;font-size:24px;display:inline-block;margin-bottom:40px;font-weight:inherit}.about-main .content{min-width:1200px;position:relative;height:510px;overflow:hidden}.about-main .content .mask{width:100%;height:650px;position:absolute;left:0;top:0;background:rgba(1,6,10,0.3)}.about-main .content .bannerVideo{width:630px;height:68px;position:absolute;top:50%;left:50%;margin-left:-300px;background:url('/static/images/newAboutusImg/bannervideo.png') 0 0 no-repeat}.about-main .guan-main .qiye-left{background:url('/images/windows_images/about_us/qiye1.png') 0 0 no-repeat;background-size:cover}.about-main .guan-main .qiye-left div{line-height:30px}.about-main .guan-main .qiye-left div h3{margin-bottom:20px;font-size:30px;color:#20273c}.about-main .guan-main .qiye-left div p{color:#666a7b}.about-main .guan-main .qiye-right{cursor:pointer}.about-main .guan-er .qiye-left{background:url('/about-us_images/qiye3.png') 0 0 no-repeat;background-size:cover}.about-main .guan-er .qiye-news{width:56%;padding-left:10%;margin-top:148px}.introdu-div{margin-bottom:145px}.introdu-div h4{margin:95px 0 50px 0;text-align:center;color:#20273c;font-size:30px}.introdu-div p{margin:0 auto;width:640px;color:#666a7b;text-align:left;font-size:14px;line-height:30px}.qiyewenhua p{text-indent:2em}