body {
	text-align: center;
	padding: 0px;
	margin: 0px;
	background-color: #f7f7f9;
}
#substance #container_1 p {
	font-family: "微软雅黑";
	font-size: 15px;
	margin-right: 14px;
	margin-left: 14px;
	color: #2A3F00;
	line-height: 1.5em;
	letter-spacing: 1.6px;
}
#container_1 h4 {
	text-align: center;
	margin-right: auto;
	margin-left: auto;
	color: #555F55;
}