@media screen and (min-width: 768px) {
  #p-soundproofing-example .l-main-content {
    padding: 0 0 0 280px;
  }
}
#p-soundproofing-example .l-side .u-sp-link {
  padding: 2px 30px 10px 0;
}

.c-heading-2__en:before {
  content: url(../img/p-faq/question.svg);
}

.section:not(:first-of-type) {
  margin: 200px 0 0;
}
@media screen and (max-width: 767px) {
  .section:not(:first-of-type) {
    margin: 100px 0 0;
  }
}

.faq-list {
  display: grid;
  gap: 30px;
  margin: 50px auto 0;
  counter-reset: faq-counter;
}
@media screen and (max-width: 767px) {
  .faq-list {
    gap: 10px;
    margin: 30px auto 0;
  }
}

.faq-item {
  overflow: hidden;
  padding: 30px 50px 30px 80px;
  border-radius: 10px;
  background: #f7f7f5;
  counter-increment: faq-counter;
}
@media screen and (max-width: 767px) {
  .faq-item {
    padding: 15px;
  }
}
.faq-item.is-open .faq-item__name:after {
  background-image: url(../img/p-works-area/open.svg);
}
@media screen and (max-width: 767px) {
  .faq-item.is-open .faq-item__name:after {
    background-image: url(../img/p-works-area/sp/open.svg);
  }
}
.faq-item.is-open .faq-item__content {
  opacity: 1;
}
.faq-item__name {
  position: relative;
  z-index: 0;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: justify;
  -ms-flex-pack: justify;
  justify-content: space-between;
  padding: 0 50px 0 0;
  min-height: 48px;
  width: 100%;
  color: #354b71;
  text-align: left;
  font-weight: bold;
  font-size: 24px;
  cursor: pointer;
  -webkit-transition: 0.3s;
  transition: 0.3s;
}
@media screen and (max-width: 767px) {
  .faq-item__name {
    padding: 0 35px 0 33px;
    min-height: 32px;
    font-size: 16px;
  }
}
.faq-item__name:before {
  position: absolute;
  top: -30px;
  left: -80px;
  z-index: -1;
  padding: 0 0 0 30px;
  width: calc(100% + 130px);
  height: 108px;
  content: "Q" counter(faq-counter) ".";
  font-weight: bold;
  font-size: 30px;
  font-family: "Caveat", cursive, sans-serif;
  line-height: 108px;
}
@media screen and (max-width: 767px) {
  .faq-item__name:before {
    top: -15px;
    left: -15px;
    padding: 0 0 0 15px;
    width: calc(100% + 30px);
    height: 65px;
    font-size: 20px;
    line-height: 65px;
  }
}
.faq-item__name:after {
  position: absolute;
  top: 50%;
  right: 0;
  width: 48px;
  height: 48px;
  background-image: url(../img/p-works-area/close.svg);
  background-position: center;
  background-size: contain;
  background-repeat: no-repeat;
  content: "";
  -webkit-transition: 0.3s;
  transition: 0.3s;
  -webkit-transform: translateY(-50%);
  transform: translateY(-50%);
}
@media screen and (max-width: 767px) {
  .faq-item__name:after {
    width: 32px;
    height: 32px;
    background-image: url(../img/p-works-area/sp/close.svg);
  }
}
.faq-item__content {
  display: none;
  margin: 20px 0 0;
  padding: 25px 0 0;
  border-top: solid 1px #dadcde;
  opacity: 0;
  -webkit-transition: opacity 0.3s;
  transition: opacity 0.3s;
}
@media screen and (max-width: 767px) {
  .faq-item__content {
    margin: 10px 0 0;
    padding: 15px 0 0;
  }
}
.faq-item__content > *:first-child {
  margin: 0;
}
.faq-item__content b {
  display: block;
  margin: 20px 0 0;
}
@media screen and (max-width: 767px) {
  .faq-item__content b {
    margin: 10px 0 0;
  }
}

.back-button {
  margin: 50px auto 0;
}
@media screen and (max-width: 767px) {
  .back-button {
    margin: 30px auto 0;
  }
}