.aboutus .graybox {
  box-sizing: border-box;
  width: 100%;
  max-width: min(46rem, 100%);
  min-width: 0;
  padding: 0;
  isolation: auto;
  background: transparent;
  border: none;
  border-radius: 0;
  box-shadow: none;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}

.aboutus .graybox::before {
  content: none;
  display: none;
}

.aboutus .graybox > * {
  position: static;
  z-index: auto;
}

.about-letter {
  box-sizing: border-box;
  width: 100%;
  max-width: min(44rem, 100%);
  min-width: 0;
  margin-inline: auto;
  padding: 2.5rem 2.75rem 2.25rem;
  overflow: visible;
  color: var(--color-text-letter);
  background-color: var(--color-bg-letter);
  border-radius: var(--radius-letter);
  box-shadow: var(--shadow-letter);
  font-family: var(--font-family-base);
  text-align: start;
}

.about-letter__portrait {
  display: flex;
  justify-content: center;
  margin: 0 0 1.25rem;
}

.about-letter__heading {
  margin: 0 0 1.25rem;
  color: var(--color-text-letter);
  font-family: var(--font-family-bold);
  font-size: clamp(1.5rem, 1.2rem + 1vw, 1.75rem);
  font-weight: 700;
  font-style: normal;
  line-height: 1.25;
  letter-spacing: normal;
  text-align: center;
  text-wrap: balance;
}

.about-letter__p {
  max-width: none;
  min-width: 0;
  margin: 0;
  color: var(--color-text-letter);
  font-family: var(--font-family-base);
  font-size: 1.0625rem;
  font-weight: 400;
  line-height: 1.55;
  letter-spacing: normal;
  text-align: start;
  overflow-wrap: anywhere;
}

.about-letter__p + .about-letter__p {
  margin-top: 1rem;
}

.about-letter a {
  color: var(--color-text-accent);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

.about-letter a:hover,
.about-letter a:focus-visible {
  text-decoration-thickness: 2px;
}

.about-letter__close {
  margin-top: 2rem;
}

.about-letter__sincerely {
  margin: 0 0 0.5rem;
  color: var(--color-text-letter);
  font-family: var(--font-family-base);
  font-size: 1.0625rem;
  font-style: normal;
  line-height: 1.5;
}

.about-letter__marks {
  position: relative;
  width: min(20rem, 100%);
  min-height: 8.75rem;
}

.about-letter__sign {
  display: block;
  width: min(10.75rem, 58%);
  height: auto;
}

.about-letter__seal {
  position: absolute;
  left: 6.25rem;
  top: 0.15rem;
  width: 10.625rem;
  height: auto;
  transform: rotate(-8deg);
  pointer-events: none;
}

@media screen and (max-width: 767px) {
  .about-letter {
    padding: 1.75rem 1.35rem 1.5rem;
  }

  .about-letter__p,
  .about-letter__sincerely {
    font-size: 1rem;
  }

  .about-letter__sign {
    width: min(9.5rem, 52%);
  }

  .about-letter__seal {
    left: 5.25rem;
    width: 9.5rem;
  }
}

@media screen and (max-width: 479px) {
  .about-letter__marks {
    min-height: 8.25rem;
  }

  .about-letter__seal {
    left: 4.5rem;
    top: 0.5rem;
    width: 8.75rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .about-letter__seal {
    transform: none;
  }
}