.swiper {
      width: 100%;
      height: 100vh;
    }

    .swiper-slide {
      width: 100%;
      height: 55vh; /* 或 100vh 全屏，看需求 */
      background-size: cover;      /* 铺满容器 */
      background-position: center; /* 居中裁切 */
      background-repeat: no-repeat;
    }

    .swiper-slide img {
      display: block;
      width: 100%;
      height: 55vh;
      object-fit: cover;
      background-size: cover;      /* 铺满容器 */
      background-position: center; /* 居中裁切 */
      background-repeat: no-repeat;
    }