switch/addons/blog/wxapp/page/index/index.wxss

swiper{
  height:180px;
}
.swiper-item{
  height:100%;
  display: block;
  background-size:cover;
  background-position: center center;
}


.swiper .text {
  color: #fff;
  position: absolute;
  width: 100%;
  text-align: center;
  bottom: 30px;
  font-size: 16px;
  left: 0;
}