#slider {
  position: relative;
  overflow: hidden;
  width:700px;
  /*margin: 20px auto 0 auto;
  border-radius: 4px;*/
  text-align:center;
  margin:auto;
}

#slider ul {
	position: relative;
	margin: 0;
	padding: 0;
	height:400px;
	list-style: none;
	overflow:hidden;
}

#slider ul li {

  display: block;
  /*  float: left;text-align: center; position: relative;float: left;line-height: 300px; width: 500px; height: 300px;*/
  margin: auto;
  padding: 0;
}
 a.slider_on{
 
  position: absolute;
  top: 0;
  right:50%;
  z-index: 100;
  display: block;
	cursor: pointer;
 }
a.control_prev, a.control_next{
	/*visibility:hidden;*/
  position: absolute;
  top: 40%;
  z-index: 90;
  display: block;
  padding: 4% 3%;
  width: auto;
  height: auto;
  background: #eee;
  opacity: 0.8;
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  font-size: 18px;
  
  cursor: pointer;
}

a.control_prev:hover, a.control_next:hover {
  opacity: 1;
  -webkit-transition: all 0.2s ease;
}

a.control_prev {
  border-radius: 0 2px 2px 0;
  left:0;
}

a.control_next {
  right: 0;
  border-radius: 2px 0 0 2px;
}

.slider_option {
  position: relative;
  margin: 10px auto;
  width: 160px;
  font-size: 18px;
}