h3 {
	background-color: #ace;
	background-image: url(setting.png);
	background-repeat: no-repeat;
	background-position: 0px 0px;
	margin-left: 15px;
	padding-left: 30px;
}
h4 {
	background-color: #def;
	margin-left: 20px;
	padding-left: 30px;
}
.section div,
.section pre,
.section p {
	margin-left: 35px;
}
.section div p {
	margin-left: 0;
}

.section pre {
	padding 3px;
	border: 1px solid #ddd;
}