.bg-event{ 
    background: url(https://cdn.ntu.edu.vn/uploads/50/images/Banner-Slider/background-fish.jpg)  !important;
padding-top: 20px !important;
    padding-bottom: 30px !important;
    background-position: center !important;
    background-repeat: no-repeat !important;
    background-size: cover !important;
    border-bottom: 1px solid #ededed;
}
#main-body{background-color: #ededed;}
#top-bar{background: #3da113;}
#top-bar *{color:#fff}
#about{border-top:10px solid #3da113 ;}
.ui_kit_tab .nav.nav-tabs .nav-link.active{background: green;}