body {
    font-family: Source Han Sans CN,SF Pro SC,SF Pro Text,SF Pro Icons,PingFang SC,Helvetica Neue,Helvetica,Arial,sans-serif;
}
.bd-placeholder-img {
    font-size: 1.125rem;
    text-anchor: middle;
    -webkit-user-select: none;
    -moz-user-select: none;
    user-select: none;
}
@media (min-width: 768px) {
    .bd-placeholder-img-lg {
        font-size: 3.5rem;
    }
}
.nav-link:focus, .nav-link:hover {
    color: #2B80FD;
}
.row {
    margin: 0;
}