.bg,.download{position:absolute;left:50%}body{background:#e8e8e8}.bg{background:url(/img/sites/platform/qh/pc/bg.jpg) top center no-repeat;width:1920px;height:1344px;top:142px;margin-left:-960px;z-index:-1}.download{margin-left:80px;top:400px}.download-btn,.download-icon,.download-qr{width:130px;height:130px;font-size:12px;line-height:20px}.content{width:1200px;background:#fff;min-height:1000px;margin:490px auto 150px;overflow:hidden}