@media screen and (max-width:1300px) {
    .bansa p{font-size: 16px;line-height: 1.5;}
    .bansa h3{font-size: 1.7rem;}
    .aboutab{font-size: 0.9rem;line-height: 1.8;}
    header{position:relative;top: 0;}
    .produ p{font-size: 0.9rem;}
}
@media screen and (max-width:780px) {
    .topa h1{width: 73px;}
    .topa{width:auto;margin: 10px 0;}
    .topb{display:none;position: absolute;top: 100%;left: 0;width: 100%;background: #f9f9f9;}
    .topba ul{display:block;}
    .topba li{width:100%;}
    .topba li>p{display: block;border-bottom: 1px solid #f1f1f1;}
    .topba li>p a{padding: 16px 0;text-align: left;box-sizing: border-box;padding-left: 5%;}
    .topba li i{display:block;position: absolute;right: 3%;top: 40%;transform: rotate(-90deg);}
    .topba dl{position: inherit;background: #fff;}
    .topba dd{border-bottom: 1px solid #f3f3f3;}
    .topba dl a{font-size: 14px;}
    .tox{margin:0 60px 0 0;}
    .zhz{display:block;}
    .tox img{width: 20px;}
    .banner-box img.iu2{display:block;}
    .banner-box img.iu1{display:none;}
    .bansa div{width: 90%;margin-top:10%;}
    .bansa p{display:None;}
    .bansa h3{font-size:20px;}
    .bansa{align-items: flex-start;}
    .about{margin: 40px auto;display:block;}
    .abouta{width:100%;}
    .aboutaa{font-size:20px;}
    .aboutab{font-size: 14px;line-height: 1.5;margin: 10px auto 20px;display: -webkit-box;-webkit-box-orient: vertical;-webkit-line-clamp: 10;overflow: hidden;}
    .aboutac a{width:100%;box-sizing: border-box;text-align: center;}
    .aboutb{width:100%;margin-top:20px;}
    #produ{padding: 30px 0;}
    .produ h4{font-size: 26px;}
    .produ p{max-width:100%;font-size: 14px;line-height: 1.2rem;}
    .pros {margin: 20px auto 0;}
    .pros ul{margin:auto;flex-wrap: wrap;}
    .pros li{width: 48%;margin: 0 2% 10px 0;}
    .pros li p{padding: 1rem 0 1rem;font-size: 14px;}
    .pros li .div2{padding:0;}
    .pros li p:after{display:none;}
    .pros li span{display:none;}
    .fosta{display:None;}
    .fostb{width:100%;}
    .fost{padding: 10px 0 20px;}
    .fostbb{margin-top: 10px;}
    .fostba {width: 60px;margin:auto;}
    .n-ry{display:block;overflow: hidden;margin: 10px auto;}
    .n-tit{padding: 15px 0;}
    .n-ri{position: inherit;width: 100%;}
    .n-prob{display:block;}
    .n-proba{width:100%;}
    .n-probb{width:100%;margin-top:10px;}
    .n-yi{width:100%;position: inherit;}
    .n-ban{height: 100px;}
    .n-prs{display: block;}
    .n-prsa{width: 100%;}
    .n-prsb{width: 100%;font-family:Arial, Helvetica, sans-serif;margin-top:20px;}
    .n-prsu,.n-prsj p,.n-vdsba{font-family:Arial, Helvetica, sans-serif;}
    .n-vdsba{margin-bottom:20px;}
    .n-video {margin: 10px auto 20px;}
    .n-video ul{margin:auto;display:block;}
    .n-video li{width:100%;max-height: none;margin:0 auto 20px;background: none;}
    .n-news li{display:block;margin-bottom: 10px;}
    .n-newsa{width:100%;border-bottom-left-radius:0;}
    .n-newsb{width:100%;margin-top:10px;}
    .n-newsb .p{font-family:Arial, Helvetica, sans-serif;}
    .n-contact{margin: 20px auto 30px;display:block;}
    .n-cona{width:100%;margin-top:0;}
    .n-conb{width:100%;margin:20px auto;}
}