body,html{margin:0;padding:0;width:100%;height:100%}#app{font-family:Avenir,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-align:center;color:#2c3e50;background:url(../img/bj.31808dcb.jpg) no-repeat 50%;background-size:100% 100%;min-height:100vh}#nav{padding:30px}#nav a{font-weight:700;color:#2c3e50}#nav a.router-link-exact-active{color:#42b983}.flex{display:flex}.flex-content-center{justify-content:center}.flex-space-between{justify-content:space-between}.flex-space-around{justify-content:space-around}.flex-items-center{align-items:center}.flex-wrap{flex-wrap:wrap}