body {
    background-color: #F0F0F0;
    color: #64686d;
    font-family: 'PingFangSC-Regular', 'Times New Roman', 'Raleway', 'Sans-Serif';
    font-weight: 400;
    margin: 0 auto;
    max-width: 760px;
}

a {
    color: #4154f1;
    -webkit-transition: color 400ms, background-color 400ms;
    -moz-transition: color 400ms, background-color 400ms;
    -o-transition: color 400ms, background-color 400ms;
    transition: color 400ms, background-color 400ms;
    text-decoration: none;
}

a:hover, a:focus {
    color: #717ff5;
}

.nav-tabs-bordered {
    border-bottom: 2px solid #ebeef4;
}
.nav-tabs-bordered .nav-link {
    border: none;
    border-color: transparent;
    color: #2c384e;
    margin-bottom: -2px;
}
.nav-tabs-bordered .nav-link.active {
    background-color: #fff;
    color: #4154f1;
    border-bottom: 2px solid #4154f1;
}