.casepage-nav{ width:1200px; margin:0 auto; font-size:16px; color:#444; line-height:30px; padding-top:70px; padding-bottom:100px;  font-family:"微软雅黑";}

.casepage-nav .pic{ text-align:center;}

.casepage-nav p img{ padding-top:30px; padding-bottom:10px;height: auto !important;width: 100% !important;}



@media (max-width: 639px) {

.casepage-nav{ width:80%;  font-size:14px;  padding-top:20px; padding-bottom:30px; font-family:"微软雅黑";}

.casepage-nav .pic{ text-align:center;}

.casepage-nav .pic img{ width:100%; height:auto; padding-top:20px; padding-bottom:10px;}

}



@media (min-width: 640px) and (max-width:1023px ) {

.casepage-nav{ width:80%;  font-size:14px;  padding-top:20px; padding-bottom:30px; font-family:"微软雅黑";}

.casepage-nav .pic{ text-align:center;}

.casepage-nav .pic img{ width:100%; height:auto; padding-top:20px; padding-bottom:10px;}

}



@media (min-width: 1024px) and (max-width:1440px ) {

.casepage-nav{ width:80%;  font-size:14px;  padding-top:20px; padding-bottom:30px;  font-family:"微软雅黑";}

.casepage-nav .pic{ text-align:center;}

.casepage-nav .pic img{ width:100%; height:auto; padding-top:20px; padding-bottom:10px;}

}

@media (min-width: 1441px) and (max-width:1920px ) {

}