#home .sec1 .main-img{
  background-image: url(https://kodomo-shokudou.city.fukuoka.lg.jp/wp-content/themes/kodomo-cafe/img/main-img5.png);
}

.acd-label:after {
 content: ' ';
 background-image: url(https://kodomo-shokudou.city.fukuoka.lg.jp/wp-content/themes/kodomo-cafe/img/faq-arrow2.png);
 background-size: 100% auto;
 background-repeat: no-repeat;
}

.acd-check:checked+.acd-label:after {
 content: ' ';
 background-image: url(https://kodomo-shokudou.city.fukuoka.lg.jp/wp-content/themes/kodomo-cafe/img/faq-arrow1.png);
 background-repeat: no-repeat;
}