.p-letter {
  width: 100vw;
  background-color: #de8314;
  margin: 0 calc(50% - 50vw) 80px;
  padding: 56px 0 100px;
}

.p-letter .p-letter__cont {
  width: 94%;
  max-width: 1000px;
  margin: 0 auto;
  padding: 48px 40px 18px 40px;
  background-color: #fff;
  box-sizing: border-box;
}

.p-letter .p-letter__title {
  position: relative;
  display: block;
  width: fit-content;
  margin: 0 auto 25px;
  color: #de8314;
  font-size: 18px;
  font-weight: 700;
  text-align: center;
}

.p-letter .p-letter__title .fs-small {
  font-size: 16px;
}
.p-letter .p-letter__title .fs-large {
  font-size: 26px;
}

.p-letter .p-letter__title::before {
  content: '';
  position: absolute;
  top: 50%;
  left: -46px;
  transform: translateY(-52%);
  background-image: url(../images/icon-quill-pen.png);
  background-repeat: no-repeat;
  background-position: center;
  background-size: contain;
  width: 55px;
  height: 72px;
}

.p-letter .p-letter__cont--note {
  background-color: #fff; /* 背景色 */
  background-image: linear-gradient(90deg, transparent 0%, transparent 50%, #fff 50%, #fff 100%), linear-gradient(180deg, #e4e4e4 1px, transparent 1px);
  background-size: 0 100%, /* 点線1のサイズ */ 100% 2.8em; /* 点線2のサイズ */
  line-height: 2.8em; /* 文字の高さ */
  padding-bottom: 1px; /* 最終行の下にも罫線を引く */
}

.p-letter .p-letter__cont p.u-note {
  margin: 0.5em auto 0;
  font-size: 14px;
  line-height: inherit;
  text-align: right;
}

.p-letter .p-letter__cont--note p {
  margin: 0;
  font-size: 14px;
  line-height: inherit;
}

.p-letter .p-letter__cont--note p span {
  background: linear-gradient(transparent 60%, #fffe98 60%);
}

@media screen and (max-width: 640px) {
  .p-letter {
    background-color: #de8314;
    margin: 0 calc(50% - 50vw) 80px;
    padding: 26px 0;
  }

  .p-letter .p-letter__cont {
    padding: 43px 24px 16px 24px;
  }

  .p-letter .p-letter__title {
    position: relative;
    display: block;
    width: fit-content;
    margin: 0 auto 25px;
    color: #de8314;
    font-size: 12px;
    font-weight: 700;
    text-align: center;
    line-height: 1.4;
  }

  .p-letter .p-letter__title .fs-small {
    font-size: 12px;
  }
  .p-letter .p-letter__title .fs-large {
    font-size: 20px;
  }

  .p-letter .p-letter__title::before {
    left: -28px;
    width: min(14.666666666666666vw, 55px);
    height: min(19.2vw, 72px);
  }

  .p-letter .p-letter__cont--note {
    background-color: #fff; /* 背景色 */
    background-image: linear-gradient(90deg, transparent 0%, transparent 50%, #fff 50%, #fff 100%), linear-gradient(180deg, #e4e4e4 1px, transparent 1px);
    background-size: 0 100%, /* 点線1のサイズ */ 100% 2.3em; /* 点線2のサイズ */
    line-height: 2.3em; /* 文字の高さ */
    padding-bottom: 1px; /* 最終行の下にも罫線を引く */
  }

  .p-letter .p-letter__cont p.u-note {
    margin: 0.5em auto 0;
    font-size: 12px;
    line-height: inherit;
    text-align: right;
  }

  .p-letter .p-letter__cont--note p {
    margin: 0;
    font-size: 12px;
    line-height: inherit;
  }
}

@media screen and (max-width: 375px) {
  .p-letter .p-letter__title {
    font-size: 3.2vw;
  }

  .p-letter .p-letter__title .fs-small {
    font-size: 3.2vw;
  }

  .p-letter .p-letter__title .fs-large {
    font-size: 5.333333333333334vw;
  }
}

#index .idx_btn01 a span.c-under::after {
  transform: rotate(90deg);
}

#index .idx_btn01 a span.c-under::after {
  transform: rotate(90deg);
}

#index .idx_btn01 a:hover span.c-under::after {
  right: 0;
}

.about-list-img {
  display: block;
  width: 100%;
}

.about-list-img img {
  width: 100%;
  object-fit: contain;
}