html,body{color:#666;font-family:'OPPOSansR',-apple-system, BlinkMacSystemFont,"Microsoft Yahei", "PingFang SC",'Roboto', 'Helvetica Neue', Helvetica, Arial, sans-serif;font-style:normal;font-size:100%;line-height:1.75;}
.nav-link{font-weight: 600;}
.title-model h2{font-weight: 600;}