.tips { display: none; position: fixed; left: 50%; top: 50%; margin-top: -24px; font-size: 24px; background: #fff; z-index: 9999; }
.tips .normal, .tips .success, .tips .error { padding: 15px 35px; color: #464646; border: 2px solid #ddd; background-color: #fafafa; }
.tips .success {  border-color: #c7eea4; background-color: #f7fcf2; }
.tips .error { border-color: #fcd0d0; background-color: #fff9f9; }
.tips .success b, .tips .error b { float: left; margin-right: 10px; width: 32px; height: 32px; background: url(../images/tip_icon.png) no-repeat left top; }
.tips .success b { background-position: right top; }