*{
	margin: opx;
	padding: 0px;
}
.dau_trang{
	background-color: black;
	height: 50px;
	width: 100%;
text-align: center;
line-height: 50px;
font-size: 40px;
color: white;
}
.dt_1{
display: inline-block;
margin-left: 20px;
margin-right: 20px;
}
.giua{
	width: 100%;
	height: 500px;
	background-color: gold;
	text-align: center;
}
.avt{
	width: 300px;
	height: 300px;
	margin-top: 70px;
	border-radius: 40%;
	text-align: center;
}
.ho_ten{
font-size: 40px;
font-weight: bold;
}
.ho_ten:hover{
color: greenyellow;
font-size: 60px;
text-align: center;
}
.dt_1:hover{
color: greenyellow;
text-align: center;
}