.osSlider-main .slider-btn-prev {
  position: absolute;
  z-index: 30;
  top: 50%;
  left: -45px;
  width: 40px;
  height: 40px;
  text-indent: -9999px;
  margin-top: -20px;
  background: url(/upload/images/2018/9/7172845248.png) 50% 50% no-repeat;
  transition: all .5s linear
}
.osSlider-main:hover .slider-btn-prev{left:3%;}
.osSlider-main .slider-main li a img{width:100%;}
.osSlider-main .slider-btn-next {
  position: absolute;
  z-index: 30;
  top: 50%;
  right: -45px;
  width: 40px;
  height: 40px;
  text-indent: -9999px;
  margin-top: -20px;
  background: url(/upload/images/2018/9/7172934641.png) 50% 50% no-repeat;
  transition: all .5s linear
}
.osSlider-main:hover .slider-btn-next{right:3%;}
.osSlider-main .slider-nav{position: absolute; width: 100%; height: 5px; bottom: 40px; text-align: center; z-index: 25}
.osSlider-main .slider-nav li{display: inline-block; height: 5px; width:40px; margin: 0 12px; font-size: 12px; color: #eee; background:#d2d2d2; cursor: pointer; text-indent:9999px;}
.osSlider-main .slider-nav li.active{color: #333; background: #7ecef4;}
.osSlider-main .slider-nav li:hover{background: #82aff2;}
.slider{width:100%!important;margin:0 auto;overflow:hidden;height:400px;z-index:0;}
.slider-main > li > img{width: 100%;}