<div class="container">
      <!-- Sliderを包むコンテナ要素 -->
      <div class="swiper">
        <!-- スライド要素を包む要素 -->
        <div class="swiper-wrapper">
          <!-- 各スライド -->
          <div class="swiper-slide slide1">
            <p>スライド1</p>
          </div>
          <div class="swiper-slide slide2">
            <p>スライド2</p>
          </div>
          <div class="swiper-slide slide3">
            <p>スライド3</p>
          </div>
        </div>
        <div class="swiper-button-prev"></div>
        <div class="swiper-button-next"></div>
        <!--<div class="swiper-pagination"></div> ここではなく-->
      </div>
      <div class="swiper-pagination"></div>  <!--ここに書く-->
    </div>

.container {
  margin-left: auto;
  margin-right: auto;
  max-width: 100%;
  position: relative;
}
.swiper {
  /*スライダーの幅と高さを調整*/
  width: 90%;
  height: 200px;
  margin: 0.5rem auto;
}

.swiper-slide {
  /*スライド要素の幅と高さを調整*/
  width: 100%;
  height: 100%;

  /*テキストの位置調整*/
  display: flex;
  justify-content: center;
  align-items: center;

  /*テキストの色と太さを指定*/
  color: #fff;
  font-weight: bold;
}

/*各スライドの背景色の設定*/
.slide1 {
  background-color: #88acbd;
}

.slide2 {
  background-color: #99cb1f;
}

.slide3 {
  background-color: #e43a47;
}

/* ページネーション */
.swiper-pagination-bullets.swiper-pagination-horizontal,
.swiper-pagination-custom,
.swiper-pagination-fraction {
  bottom: -2rem; //2文字分下に下げる
}

const swiper = new Swiper(".swiper", {
  navigation: {
    nextEl: ".swiper-button-next",
    prevEl: ".swiper-button-prev",
  },
  pagination: {
    el: ".swiper-pagination", 
    type: "bullets",
    clickable: "clickable",
  },
});