*{margin: 0px;
padding: 0px;
}
.Đầu_trang{
background-color: orange;
height: 60px;
width:100% ;
text-align: center;
line-height: 50px;
font-size: 25px;
color: blue;
}
.dt1{
	display: inline-block;
	margin-left: 20px;
	margin-right: 20px;
	vertical-align: middle;
	font-weight: bold;
}
.avt {
    width: 300px;
    height: 300px;
    object-fit: cover;
    border-radius: 50%;
    vertical-align: middle;
    background-color: white; 
}
.Ho_ten{
	font-size: 40px;
	font-weight: bold;
	color: red;
}
.Ho_ten:hover {
    color: blue;
    cursor: pointer;
}
.giữa {
    background-color: yellowgreen;
    text-align: center;
    padding-top: 50px;
    padding-bottom: 50px; 
}