@media screen and (min-width: 1440px) {
	* {
		padding: 0px;
		margin: 0px;
	}

	.all {
		margin: 0 auto;
		width: 1000px;
		height: 800px;
	}

	.small {
		width: 950px;
		height: 415px;
		position: relative;
	}

	.small img {
		/*border:1px solid gray ;*/
		width: 950px;
		height: 415px;
	}

	.shadow {
		width: 100px;
		height: 100px;
		background-color: black;
		opacity: .2;
		position: absolute;
		top: 0px;
		left: 0px;
		display: none;
		cursor: move;
	}

	.cover {
		width: 100%;
		height: 100%;
		z-index: 10;
		position: absolute;
		left: 0px;
		top: 0px;
		cursor: move;
	}

	.big {
		width: 950px;
		height: 415px;
		position: relative;
		overflow: hidden;
		display: none;
		float: right;

	}

	.big img {
		width: 1900px;
		height: 830px;
		position: absolute;
		top: 0px;
		left: 0px;
	}
}
@media screen and (max-width: 1440px) {
	* {
		padding: 0px;
		margin: 0px;
	}

	.all {
		margin: 0 auto;
		width: 1000px;
		height: 800px;
	}

	.small {
		width: 100%;
		height: 415px;
		position: relative;
	}

	.small img {
		/*border:1px solid gray ;*/
		width: 100%;
		height: 415px;
	}

	.shadow {
		width: 100px;
		height: 100px;
		background-color: black;
		opacity: .2;
		position: absolute;
		top: 0px;
		left: 0px;
		display: none;
		cursor: move;
	}

	.cover {
		width: 100%;
		height: 100%;
		z-index: 10;
		position: absolute;
		left: 0px;
		top: 0px;
		cursor: move;
	}

	.big {
		width: 950px;
		height: 415px;
		position: relative;
		overflow: hidden;
		display: none;
		float: right;

	}

	.big img {
		width: 1900px;
		height: 830px;
		position: absolute;
		top: 0px;
		left: 0px;
	}
}