.pptbox{
	width: 400px;
	height: 100px;
	position: relative;
	overflow: hidden;
}

.pptbox  .innerwrapper{
	width:2400px;/*当增加了li之后，大盒子的宽度也要相应的增加 这里增加了两个li，每个400，所以ul 从原来的1600变成了2400*/
	height: 100px;
	list-style: none;
	position: absolute;
	left: -400px;
}

.innerwrapper li
{
	width:400px;
	height:100px;
	float: left;
}
.innerwrapper li a
{
	display: block;
}

.innerwrapper li a img
{
	width: 100%;
/* 	height: 792px; */
	margin: 0 auto;
	display:block;
}

/* .btnleft{
	width: 20px;
	height: 50px;
	position: absolute;
	left:0;
	top:25px;
	background-color: black;

	background-position: center center;
	background-repeat:no-repeat;
	cursor: pointer;
	z-index: 100;
	color:#fff;
}

.btnright{
	width: 20px;
	height: 50px;
	position: absolute;
	right:0;
	top:25px;
	background-color: black;

	background-position: center center;
	background-repeat:no-repeat;
	cursor: pointer;
	z-index: 100;
	color:#fff;
	
} */

/*控制按钮开始*/

.controls{
width:96px;
position: absolute;
left:152px;
bottom:43px !important;
list-style: none;
}
.controls li{
width: 30px;
height:8px;
background-color: white;
float: left;
margin-right:2px;
text-align: center;	
cursor: pointer;
}

.controls li.current{
background-color: #CF1C1C;
color: brown;
}

/*控制按钮结束*/