<style>
  .youtube-list-section {
    max-width: 1200px !important;
    margin: 2em auto !important;
    font-family: sans-serif !important;
  }
  .youtube-list-section .youtube-list-title {
    font-size: 1.8em;
    font-weight: bold !important;
    margin-bottom: 1em;
    border-bottom: 3px solid #cc0000 !important;
    padding-bottom: 0.5em;
  }
  
  /* スライダー全体のコンテナ */
  .youtube-list-section .swiper.youtube-slider {
    padding: 10px 0 40px 0;
    width: 100% !important;
    height: auto !important;
    position: relative !important; /* Swiperの矢印配置のために必要 */
    z-index: 1 !important;
  }

  /* --- 共通のカードスタイル --- */
  .youtube-list-section .video-card {
    text-decoration: none !important;
    color: #111 !important;
    display: block !important;
    height: 100% !important;
  }
  .youtube-list-section .video-card-thumbnail {
    position: relative !important;
    width: 100% !important;
    padding-top: 56.25% !important; /* 16:9比率 */
    background-color: #f0f0f0 !important;
    border-radius: 8px !important;
    overflow: hidden !important;
  }
  .youtube-list-section .video-card-thumbnail img {
    position: absolute !important;
    top: 0 !important; left: 0 !important;
    width: 100% !important; height: 100% !important;
    object-fit: cover !important;
  }
  .youtube-list-section .video-card-title {
    font-size: 0.9em !important;
    font-weight: bold !important;
    line-height: 1.4 !important;
    margin-top: 10px !important;
    color: #111 !important;
  }

  /* --- PC表示用のスタイル (769px以上) --- */
  @media (min-width: 769px) {
    .youtube-list-section .swiper-wrapper {
      display: flex !important;
      justify-content: flex-start !important;
      overflow-x: auto !important;
      padding-bottom: 15px !important;
    }
    .youtube-list-section .swiper-slide {
      width: 24% !important;
      margin-right: 1.33% !important;
      flex-shrink: 0 !important;
    }
    .youtube-list-section .swiper-button-next,
    .youtube-list-section .swiper-button-prev,
    .youtube-list-section .swiper-pagination {
      display: none !important;
    }
  }

  /* --- スマホ表示用のスタイル (768px以下) --- */
  @media (max-width: 768px) {
    .youtube-list-section .swiper-button-next,
    .youtube-list-section .swiper-button-prev {
      color: #095DAD !important;
    }
    .youtube-list-section .swiper-pagination-bullet-active {
      background: #095DAD !important;
    }
  }
</style>