.os-info{font-size:15px;max-width:575px;margin:0 auto;text-align:left;color:#312d2d}.btn-p{text-align:center;margin:40px 0 20px}.btn-p .common-btn{display:inline-block;padding:10px 20px;border-radius:5px;color:#fff;background-color:#92e1c0}.btn-p .common-btn:hover{box-shadow:0 0 3px rgba(0,0,0,.35)}.btn-p .product{margin-left:20px;background-color:#00bcd4}.os{background:#f8f8f8}.os .os-p{font-size:30px;color:#312d2d;text-align:center;margin-top:100px;margin-bottom:30px}.os img{display:block;margin:40px auto 0;width:676px}.oc{background:#f8f8f8}.oc .os-p{font-size:30px;color:#312d2d;text-align:center;margin-top:70px;margin-bottom:30px}.oc img{display:block;margin:40px auto 50px;width:686px}