1.
.panel-heading { background-image:linear-gradient(to bottom,rgba(0,0,0,0.05) 0%,rgba(0,0,0,0) 100%) !important; border-bottom-width: 1px; border-bottom-style: solid; border-bottom-color: rgba(0,0,0,0); border-top-left-radius:3px; border-top-right-radius:3px; padding:10px; }
2.
.panel-primary>.panel-heading>a { color:#fff; }
3.
.panel-primary>.panel-heading>a:hover { color:#dcdcdc; }
Cái naỳ là trong file style.css của nukeviet 4.1