body {
	margin:0;
	padding:0;
	font-size:16px;
}
form {
	margin:0 auto;
	width:305px;
	transition:all 1s ease-out 0s;
}
input {
	font-size:16px;
	height:25px;
	width:280px;
	margin-top:20px;
	color:#333;
	outline:none;
	border-radius:5px;
	border:1px solid #ccc;
}
input:focus {
	border:1px solid #09f;
}
p {
	display:inline-block;
	font-size:12px;
	color:#ccc;
	margin:0;
	margin-right:6px;
}
span {
	display:none;
	width:42px;
	font-size:12px;
	margin-left:2px;
	color:#ccc;
	background:#ccc;
	text-align:center;
}
span.ruo {
	background:#f00;
	color:#fff;
	opacity:0.5;
}
span.zo {
	background:rgb(255,224,0);
	opacity:1;
	color:#fff;
}
span.qiang {
	background:rgb(3,146,3);
	color:#fff;
}