.page-contact {
  --pc-gap: clamp(1rem, 2.4vw, 1.5rem);
  --pc-pad: clamp(2.2rem, 5vw, 4rem);
}

.page-contact a:focus-visible,
.page-contact summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-contact .contact-hero {
  padding: clamp(2rem, 5vw, 3.4rem) 0 clamp(2.4rem, 5vw, 4rem);
  background:
    radial-gradient(90% 120% at 78% 0%, rgba(85, 230, 210, 0.08), transparent 62%),
    radial-gradient(70% 100% at 0% 100%, rgba(242, 184, 75, 0.06), transparent 60%);
}

.page-contact .hero-split {
  display: grid;
  gap: clamp(1.6rem, 4vw, 3rem);
  margin-top: clamp(1.6rem, 4vw, 2.6rem);
}

.page-contact .hero-kicker {
  margin: 0 0 0.9rem;
  font-size: 0.76rem;
  letter-spacing: 0.18em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-contact h1 {
  margin: 0;
  font-size: clamp(2.3rem, 6.2vw, 4.1rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.04;
  color: var(--paper);
}

.page-contact .hero-lede {
  margin: 1.1rem 0 0;
  max-width: 40ch;
  font-size: clamp(0.98rem, 1.6vw, 1.08rem);
  line-height: 1.85;
  color: var(--muted);
}

.page-contact .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.6rem;
}

.page-contact .hero-visual {
  margin: 0;
}

.page-contact .hero-visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: linear-gradient(150deg, var(--raise), var(--surface));
}

.page-contact .hero-visual figcaption {
  margin-top: 0.65rem;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-contact .channels {
  padding-bottom: var(--pc-pad);
}

.page-contact .channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pc-gap);
}

.page-contact .channel {
  position: relative;
  padding: clamp(1.2rem, 2.6vw, 1.9rem);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.page-contact .channel:hover {
  transform: translateY(-3px);
  border-color: rgba(85, 230, 210, 0.5);
  background: var(--raise);
}

.page-contact .channel h2 {
  margin: 0.8rem 0 0.7rem;
  font-size: clamp(1.1rem, 2vw, 1.32rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-contact .channel p {
  margin: 0.8rem 0 0;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .channel__value {
  display: block;
  font-size: clamp(0.95rem, 2vw, 1.22rem);
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.5;
  color: var(--cyan);
  text-decoration: none;
  word-break: break-all;
}

.page-contact .channel__value:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-contact .channel__value--addr {
  font-family: var(--font-sans);
  font-weight: 600;
  color: var(--paper);
  word-break: normal;
}

.page-contact .channel--mail {
  border-color: rgba(85, 230, 210, 0.32);
  background:
    linear-gradient(160deg, rgba(85, 230, 210, 0.11), rgba(16, 31, 46, 0) 58%),
    var(--surface);
}

.page-contact .channel--mail .btn {
  margin-top: 1.2rem;
}

.page-contact .detail {
  padding: var(--pc-pad) 0;
  border-top: 1px solid var(--line-soft);
}

.page-contact .detail__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.8rem, 4vw, 3.2rem);
}

.page-contact .block-num {
  margin: 0 0 0.7rem;
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  color: var(--amber);
  text-transform: uppercase;
}

.page-contact .detail__block h2,
.page-contact .visit__copy h2,
.page-contact .response h2 {
  margin: 0;
  font-size: clamp(1.45rem, 3vw, 2.1rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.25;
  color: var(--paper);
}

.page-contact .detail__block p {
  margin: 0.9rem 0 0;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--muted);
}

.page-contact .detail__block .btn {
  margin-top: 1.4rem;
}

.page-contact .checklist {
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.page-contact .checklist li {
  padding-left: 0.95rem;
  border-left: 2px solid var(--line);
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--muted);
  transition: border-color var(--dur) var(--ease);
}

.page-contact .checklist li:hover {
  border-left-color: var(--cyan);
}

.page-contact .checklist li strong {
  display: block;
  margin-bottom: 0.15rem;
  color: var(--paper);
  font-weight: 600;
}

.page-contact .visit {
  padding: var(--pc-pad) 0;
  background: var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-contact .visit__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.6rem, 4vw, 2.8rem);
}

.page-contact .visit__copy > p {
  margin: 0.9rem 0 0;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--muted);
}

.page-contact .fold {
  margin-top: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--raise);
  overflow: hidden;
}

.page-contact .fold > summary {
  position: relative;
  padding: 0.9rem 2.6rem 0.9rem 1rem;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--paper);
  cursor: pointer;
  list-style: none;
}

.page-contact .fold > summary::-webkit-details-marker {
  display: none;
}

.page-contact .fold > summary::after {
  content: "+";
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--cyan);
}

.page-contact .fold[open] > summary::after {
  content: "–";
  color: var(--amber);
}

.page-contact .fold ul,
.page-contact .fold p {
  margin: 0;
  padding: 0 1rem 1rem;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .fold ul {
  list-style: none;
  display: grid;
  gap: 0.55rem;
}

.page-contact .fold ul li {
  position: relative;
  padding-left: 0.9rem;
}

.page-contact .fold ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 5px;
  height: 1px;
  background: var(--cyan);
}

.page-contact .visit__visual {
  margin: 0;
}

.page-contact .visit__visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: linear-gradient(140deg, var(--raise), var(--ink));
}

.page-contact .visit__visual figcaption {
  margin-top: 0.65rem;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-contact .collab {
  padding: var(--pc-pad) 0;
}

.page-contact .collab__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pc-gap);
  margin-top: 1.6rem;
}

.page-contact .collab__item {
  padding: 1.25rem 1.2rem 1.4rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .collab__item:hover {
  transform: translateY(-2px);
  border-color: rgba(143, 163, 184, 0.55);
}

.page-contact .collab__item h3 {
  margin: 0.75rem 0 0.55rem;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-contact .collab__item p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .response {
  padding: var(--pc-pad) 0;
  border-top: 1px solid var(--line-soft);
  background:
    linear-gradient(180deg, rgba(85, 230, 210, 0.05), transparent 42%);
}

.page-contact .response__note {
  margin: 0.85rem 0 0;
  max-width: 52ch;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .timeline {
  list-style: none;
  margin: 1.7rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.1rem;
}

.page-contact .timeline li {
  padding-top: 0.9rem;
  border-top: 2px solid rgba(85, 230, 210, 0.55);
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .timeline .mono {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--amber);
}

.page-contact .tail {
  padding: 0 0 clamp(2.6rem, 5vw, 4rem);
}

.page-contact .tail__inner p {
  margin: 0;
  padding-top: 1.4rem;
  border-top: 1px solid var(--line-soft);
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--muted);
}

.page-contact .tail__inner a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(85, 230, 210, 0.4);
  transition: border-color var(--dur) var(--ease);
}

.page-contact .tail__inner a:hover {
  border-bottom-color: var(--cyan);
}

@media (min-width: 760px) {
  .page-contact .channel-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .channel--mail {
    grid-column: 1 / -1;
  }

  .page-contact .collab__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-contact .hero-split {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: center;
  }

  .page-contact .hero-visual {
    transform: translateY(-1.4rem);
  }

  .page-contact .detail__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .visit__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
  }
}

@media (min-width: 1080px) {
  .page-contact .channel-grid {
    grid-template-columns: 1.55fr 1fr 1fr;
    align-items: stretch;
  }

  .page-contact .channel--mail {
    grid-column: auto;
  }

  .page-contact .collab__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
<<<END>>>