main:after {
  content: '';
  background-image: url('/images/bg/pc/top.webp'), url('/images/bg/pc/works.webp'),
    url('/images/bg/pc/works-detail.webp'), url('/images/bg/pc/members.webp'), url('/images/bg/pc/members-detail.webp'),
    url('/images/bg/pc/about.webp'), url('/images/bg/pc/news.webp'), url('/images/bg/pc/news-detail.webp'),
    url('/images/bg/pc/recruit.webp'), url('/images/bg/pc/404.webp');

  background-image: image-set('/images/bg/pc/top.avif' type('image/avif'), '/images/bg/pc/top.webp' type('image/webp')),
    image-set('/images/bg/pc/works.avif' type('image/avif'), '/images/bg/pc/works.webp' type('image/webp')),
    image-set(
      '/images/bg/pc/works-detail.avif' type('image/avif'),
      '/images/bg/pc/works-detail.webp' type('image/webp')
    ),
    image-set('/images/bg/pc/members.avif' type('image/avif'), '/images/bg/pc/members.webp' type('image/webp')),
    image-set(
      '/images/bg/pc/members-detail.avif' type('image/avif'),
      '/images/bg/pc/members-detail.webp' type('image/webp')
    ),
    image-set('/images/bg/pc/about.avif' type('image/avif'), '/images/bg/pc/about.webp' type('image/webp')),
    image-set('/images/bg/pc/news.avif' type('image/avif'), '/images/bg/pc/news.webp' type('image/webp')),
    image-set('/images/bg/pc/news-detail.avif' type('image/avif'), '/images/bg/pc/news-detail.webp' type('image/webp')),
    image-set('/images/bg/pc/recruit.avif' type('image/avif'), '/images/bg/pc/recruit.webp' type('image/webp')),
    image-set('/images/bg/pc/404.avif' type('image/avif'), '/images/bg/pc/404.webp' type('image/webp'));
}
@media print, screen and (max-width: 767px) {
  main:after {
    content: '';
    background-image: url('/images/bg/sp/top.webp'), url('/images/bg/sp/works.webp'),
      url('/images/bg/sp/works-detail.webp'), url('/images/bg/sp/members.webp'),
      url('/images/bg/sp/members-detail.webp'), url('/images/bg/sp/about.webp'), url('/images/bg/sp/news.webp'),
      url('/images/bg/sp/news-detail.webp'), url('/images/bg/sp/recruit.webp'), url('/images/bg/sp/404.webp');

    background-image: image-set(
        '/images/bg/sp/top.avif' type('image/avif'),
        '/images/bg/sp/top.webp' type('image/webp')
      ),
      image-set('/images/bg/sp/works.avif' type('image/avif'), '/images/bg/sp/works.webp' type('image/webp')),
      image-set(
        '/images/bg/sp/works-detail.avif' type('image/avif'),
        '/images/bg/sp/works-detail.webp' type('image/webp')
      ),
      image-set('/images/bg/sp/members.avif' type('image/avif'), '/images/bg/sp/members.webp' type('image/webp')),
      image-set(
        '/images/bg/sp/members-detail.avif' type('image/avif'),
        '/images/bg/sp/members-detail.webp' type('image/webp')
      ),
      image-set('/images/bg/sp/about.avif' type('image/avif'), '/images/bg/sp/about.webp' type('image/webp')),
      image-set('/images/bg/sp/news.avif' type('image/avif'), '/images/bg/sp/news.webp' type('image/webp')),
      image-set(
        '/images/bg/sp/news-detail.avif' type('image/avif'),
        '/images/bg/sp/news-detail.webp' type('image/webp')
      ),
      image-set('/images/bg/sp/recruit.avif' type('image/avif'), '/images/bg/sp/recruit.webp' type('image/webp')),
      image-set('/images/bg/sp/404.avif' type('image/avif'), '/images/bg/sp/404.webp' type('image/webp'));
  }
}