.tieude{
    font-weight: bold;
    font-size:18pt;
    color:#f00;
    margin-bottom: 20px;
    text-align: center;
}
.gioithieu{
    text-indent: 50px;
    margin-bottom: 20px;
    text-align: justify;
}
.headtitle{
    text-align: center;
    font-weight: bold;
}
@media (max-width:768px) {
    .panel-title .logo{
        width:100%;
    }
}