body{
    font-size:18px;
}
h2{
    background-color:#ff6214; 
    padding: 2px 5px;
    color: white;
    border-radius: 0 5px 5px 0;
    font-size:20px;
    max-width:350px;
}
footer{
    padding:5px 0 5px 0;
    background-color:#ff6214;
}
.tieu-de{
font-size:32px;
font-weight:800;
text-align:center;
color:blue;
text-decoration:underline;
}
ol{
    padding-left:10%;
}
ol li{
    color:blue;
}
ol li:hover{
    color: red;
}
ol a{
    color:blue;
}
ol a:hover{
    color:red;
}
#menu{
    font-size:14px;
    font-weight:700;
#menu a{
    color:white;
}
#menu a:hover{
    color:yellow;
}