#a4 .overlay {
				text-align: center;
				font-size: 48px;
				font-family: "思源黑体";
				padding: 50px 0 24px 0;
			}
			
			#a4 .span12 {
				margin: 10px auto;
				width: 650px;
			}
			
			#a4 .btn12 {
				width: 650px;
				height: 70px;
				line-height: 0px;
				background-color: #b99b7b;
				font-size: 24px;
				color: #fff;
				border-radius: 10px;
				margin: 30px 0 0;
			}
			
			#a4 .form-group input {
				width: 650px;
				height: 70px;
				border-radius: 10px;
				border: none;
				font-size: 24px;
				line-height: 70px;
				text-indent: 20px;
				color: #a0a0a0;
			}