app页面固定定位水平居中

.apbutton {
			width: 550rpx;
			height: 70rpx;
			position: fixed;
			bottom: 70rpx;
			left: 0;
			right: 0;
			margin: auto;
			background-image: linear-gradient(#ffffff,
					#ffffff),
				linear-gradient(#2659f5,
					#2659f5);
			background-blend-mode: normal,
				normal;
			box-shadow: 0rpx 0rpx 10rpx 0rpx rgba(0, 0, 0, 0.1);
			border-radius: 35rpx;
			text-align: center;
			line-height: 70rpx;
			color: #2659f5;
			font-size: 24rpx;
		}.apbutton {
			width: 550rpx;
			height: 70rpx;
			position: fixed;
			bottom: 70rpx;
			left: 0;
			right: 0;
			margin: auto;
			background-image: linear-gradient(#ffffff,
					#ffffff),
				linear-gradient(#2659f5,
					#2659f5);
			background-blend-mode: normal,
				normal;
			box-shadow: 0rpx 0rpx 10rpx 0rpx rgba(0, 0, 0, 0.1);
			border-radius: 35rpx;
			text-align: center;
			line-height: 70rpx;
			color: #2659f5;
			font-size: 24rpx;
		}