*{
    margin: 0px;
    padding: 0px;
}
.dau_trang{
    background-color: green;
    height: 50px;
    width: 100%;
    text-align: center;
    line-height: 50px;
    font-size: 30px;
    color: white;
}
.dt_1{
    display: inline-block;
    margin-left: 20px;
    margin-right: 20px;
}
.giua{
    width: 100%;
    height: 300px;
    background-color: pink;
    text-align: center;
}
.avt{
    width: 150px;
    height: 150px;
    margin-top:70px;
    border-radius: 50%;
}
.ho_ten{
    font-size: 40;
    font-weight: bold;
    color: blue;
    font-size: 60px;
}
.ho_ten:hover{
    color:greenyellow ;
    font-size:60px;
}