.slogan {
  margin: 0 auto;
  width: 100%;
  text-align: center;
  top: 50%;
  margin-top: -150px;
  font-size: 46px;
  line-height: 50px;
}
.quick_3 .item {
  padding: 0px;
}
div.main_slick3 img{
	height:86vw;
}
 div.main_slick3 .slick-slide{height:106vw;}