.slider_gallery_box {
  position: relative;
  width: 100%;
  overflow: hidden;
  margin: 5px auto 0 auto;
}

.slider_gallery_box ul {
  position: relative;
  width: 100%;
  margin: 0;
  padding: 0;
  height: 200px;
  display: inline-block;
  list-style: none;
  background: #458;
}


.slider_gallery_box ul li {
  position: relative;
  float: left;
  display: inline-block;
  margin: 0;
  padding: 0;
  width: 300px;
  max-height: 200px;
  text-align: center;
  color: #333;
}


.control_zz {
  position: absolute;
  top: 40%;
  z-index: 999;
  display: block;
  padding: 4% 3%;
  width: auto;
  height: auto;
  background: #2a2a2a;
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  font-size: 18px;
  opacity: 0.8;
  cursor: pointer;
}

.slider_gallery_box_prev {
  left: 0px;
}

.slider_gallery_box_next {
  right: 0px;
}