.whyjava{
	background:#0b183c;
	height:1242px;
	text-align: center;
	width: 100%;
}
.whyjava01{
	background:#fff;
	height:644px;
	text-align: center;
}
.whyyateng{
	background:#0b183c;
	height:846px;
	text-align: center;
}
.bawo{
	background:#fff;
	height:644px;
	text-align: center;
}