.btn{
				font-family: "微软雅黑";
				font-weight:650;
				font-size: 20px;
				margin: 20px auto;

				padding: 10px 100px 10px 100px;
				color: #222;
				border: none;
				text-shadow: 0 1px 1px rgba(255, 255, 255, 0.85);
				background-image: -webkit-gradient(linear, 0% 0%, 0% 100%, from(#fff), to(#aaa));
				background: -ms-linear-gradient(right, #fff 0%, #ddd 100%);
				-ms-filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#fff', endColorstr='#ddd', GradientType=0);
				-webkit-background-color: linear-gradient(to right, #fff, #0ff);
				-webkit-border-radius: 23px;
				-moz-border-radius: 23px;
				-o-border-radius: 23px;
				border-radius: 23px;
				-webkit-box-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
				-moz-box-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
				box-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
			}
			
			@-webkit-keyframes pulse {
				0% {
					-webkit-box-shadow: 0 0 12px rgba(51, 204, 255, 0.2);
				}
				50% {
					-webkit-box-shadow: 0 0 12px rgba(51, 204, 255, 0.9);
				}
				100% {
					-webkit-box-shadow: 0 0 12px rgba(51, 204, 255, 0.2);
				}
			}
			
			.btn:hover,
			.btn:focus {
				cursor: pointer;
				color: #000;
				-webkit-animation: pulse 3s infinite ease-in-out;
				transition: all 0.5s ease-in-out;
				-webkit-box-shadow: 0 3px 5px rgba(0, 0, 0, 0.7);
				-moz-box-shadow: 0 3px 5px rgba(0, 0, 0, 0.7);
				box-shadow: 0 3px 5px rgba(0, 0, 0, 0.7);
			}