swiper 圆点样式修改

/* 当前点点的样式 */
.banner .wx-swiper-dot{
  width: 10rpx;
  height: 10rpx;
  border-radius: 50%;
}
.banner .wx-swiper-dot.wx-swiper-dot-active {
  width: 20rpx;
  height: 10rpx;
  border-radius: 4rpx;
}