.swiper {
      width: 100%;
      aspect-ratio: 16 / 7;
      /* 这里是纵横比，根据你的需求调整 */
      height: auto;
      background-color: aqua;

    }

    .swiper-slide {
      background-position: center;
      background-size: cover;
    }

    .swiper-slide img {
      display: block;
      width: 100%;
    }