h1,h2,h3,h4{
	font-family:Georgia, serif;
	color:#3A4523;
	text-align: center;
}
#navigation{
	text-align: center;
}
a:hover {
    color: black;
    text-decoration: underline;
}
#h1h2{
	background-color:lightgray;
}
#diyiju{
	text-align: center;
}
#lianxi{
	background-color: lightyellow;
}
p{
	font-family: revert;
}