body{font-family:"Microsoft YaHei", SimSun, serif;}.canvas-bg{position:absolute;top:0px;left:0px;width:100%;height:100%;z-index:-1;}.section-padding{padding-top:4rem;padding-bottom:4rem;}.nav-active{color:rgb(59, 130, 246);border-bottom-width:2px;border-bottom-style:solid;border-bottom-color:rgb(59, 130, 246);}