@charset "UTF-8";

@media (max-width: 991px) {
  .illust_line_2 {
    display: none;
  }
  .illust_line_1 {
    top: 46rem;
  }
  .illust_line_4 {
    width: 73vw;
    top: 250rem;
    background-size: 115%;
  }
}
@media (min-width: 992px) {
  .illust_line_1 {
    display: none;
  }
  .illust_line_2 {
    top: 172rem;
  }
  .illust_line_4 {
    top: 53rem;
  }
}


#main {
  --color2: #CA6600;
}
#main .ttl {
  font-weight: 700;
  line-height: 1.75;
}


@media (max-width: 991px) {
  .sticky_nav ul.toc li .btn{
    background: var(--white);
    color: var(--color2);
    border-color: currentColor;
    min-height: 4rem;
    letter-spacing: 0;
  }
}
@media (min-width: 992px) {
  .sticky_nav {
    display: none;
  }
}



@media (max-width: 575px) {
  #dl .ttl {
    font-size: 1.1rem;
  }
}

@media (max-width: 575px) {
  #about h2.ttl {
    background: var(--white);
    padding: .75em 0;
    border-radius: .75rem;
  }
}


#howto .flow {
  row-gap: 4rem;
  --gap: 2rem;
}
#howto .flow li {
  position: relative;
}
#howto .flow li:not(:last-child)::after {
  content: '';
  display: block;
  width: 1.75em;
  aspect-ratio: 1/1;
  border-top: 1px solid currentColor;
  border-right: 1px solid currentColor;
  transform: translate(50%,25%) rotate(135deg);
  position: absolute;
  top: 100%;
  right: 50%;
}
@media (min-width: 768px) {
  #howto .flow li:not(:last-child)::after {
    transform: translate(25%,-50%) rotate(45deg);
    top: 50%;
    right: 0;
  }
}

#howto dl {
  height: 100%;
  background: var(--l-gray);
  border-radius: .75rem;
  padding: 1.5rem;
  line-height: 1.5;
}
#howto dl dt {
  font-size: 1.3em;
  text-align: center;
  border-bottom: 1px solid currentColor;
  padding-bottom: .75em;
  margin-bottom: 1.75em;
}
#howto dl dd {
  margin-bottom: 1.5em;
}
#howto .app-icon {
  filter: drop-shadow(3px 3px 6px #aaa);
  max-width: 70%;
}

@media (max-width: 575px) {
  #howto .app-icon {
    max-width: 35%;
  }
}