* {
	margin: 0;
	padding: 0
}

li {
	list-style: none outside none
}

.silder-box {
	position: relative;
	margin: 50px auto
}

.silder {
	margin: 0 auto
}

.silder li {
	width: 420px;
	height: 300px
}

.silder li img {
	width: 100%;
	height: 100%
}

.silder-button {
	top: 173px;
	width: 25px;
	height: 54px;
	position: absolute;
	cursor: pointer
}

.silder-button.btl {
	left: 10px;
	background: url(../images/bl.png)
}

.silder-button.btr {
	right: 10px;
	background: url(../images/br.png)
}

.silder-box-1 {
	width: 1000px
}

.silder-box-2 {
	width: 500px
}

.silder-box-2 .silder li {
	width: 200px;
	height: 200px
}

.silder-box-3 {
	width: 1000px
}