.tieude {    padding: 10px 0px 10px 0px;    border: #E4E4E4 1px solid;    margin-bottom: 2px;    font-size: 14px;    font-weight: bold;    text-align: center;    color: #3624c2;}.header_n {    margin-bottom: 2px;    font-size: 14px;    font-weight: bold;    text-align: center;    background: #91bef4;}.content_n {    margin-bottom: 2px;    font-size: 12px;    font-weight: normal;    text-align: center;    color: #1b0669;}.thongbao {    margin: 10px;    font-size: 12px;}.thongbao h1 {    color: #F00;    font-size: 15px;    font-weight: bold;    text-align: center;    text-transform: uppercase;    border-bottom: 1px solid #F6F;    padding-bottom: 15px;    margin-bottom: 15px;}.thongbao p {    text-align: justify;}td {    vertical-align: middle;    margin: 0px 0px 0px 0px;}