body{
	font-size: 17px;
	line-height: 1.8;
	background: #efefef;
}
.wrapper{
	margin:0 auto;
	padding:10px;
	background: #fff;
}
#str_ketqua{
	overflow: auto;
	max-height: 250px;
}
.clear{
	clear: both;
	content: '';
}
.input-group{
	margin: 5px 0;
}

input, button, select, textarea{
	height: 30px;
}
.desc p{
	padding-bottom: 30px;
	text-align: center;
}