header{
	width: 640px;
	height: 44px;
}


h1{
	font-size: 28px;
	line-height: 44px;
	margin: 0;
	padding: 0;
	text-align: center;
}

ul{
	width: 600px;
	margin-left: auto;
	margin-right: auto;
	font-size: 16px;
	/*border: solid thin blue;*/
}

section{
	width: 640px;

}

iframe{
	width: 100%;
	height: 100%;
}

button.category_name{
	width: 640px;
	padding: 5px 0;
	font-size: 22px;
}

.u_no{
	font-size: 18px;
	margin-right: 10px;
	border-radius: 20px;
	width: 30px;
	height: 30px;
	line-height: 30px;
}

.u_no.str{
    width: 60px;
}

.unit{
	font-size: 22px;
	padding: 0 0 0 0;
}

button.viewBtn{
	width: 640px;
	height: 50px;
	font-size: 22px;
	line-height: 32px;
	text-align: center;
	margin: 10px 0 7px 0;
}

span.no{
	font-size: 18px;
	border-radius: 5px;
	line-height: 22px;
	width: 22px;
	height: 22px;
	margin-left: 7px;
	margin-right: 7px;
}

span.title{
	font-size: 20px;
	font-weight: 500;
}

span.title-s{
    font-size: 18px;
}

span.pages{
	font-size: 16px;
	margin-left: ;
}

div.videoframe{
	width: 640px;
	height: 480px;
	margin-left: auto;
	margin-right: auto;
}