.page-contact {
  --pc-cut: 18px;
  --pc-pad: clamp(20px, 3.2vw, 32px);
  background:
    radial-gradient(circle at 90% 2%, rgba(200, 255, 61, 0.10), transparent 44%),
    linear-gradient(180deg, var(--ink-green) 0%, var(--ink-blue) 58%, var(--ink-green) 100%);
  color: var(--paper);
  font-family: var(--font-body);
  padding: clamp(22px, 4vw, 44px) 0 clamp(56px, 8vw, 100px);
  overflow-x: clip;
}

.page-contact a:not(.btn) {
  color: inherit;
  text-decoration: none;
}

.page-contact .contact-hero {
  display: grid;
  gap: clamp(28px, 5vw, 52px);
  margin-top: clamp(18px, 3vw, 30px);
}

.page-contact .contact-hero__lead h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.9rem, 6.4vw, 3.05rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0.42em 0 0.5em;
}

.page-contact .contact-hero__lead .lede {
  max-width: 48ch;
  opacity: 0.88;
  margin: 0;
}

.page-contact .contact-card {
  margin-top: clamp(22px, 3vw, 30px);
  padding: var(--pc-pad);
  background: var(--ink-indigo);
  border: 1px solid var(--lime);
  display: grid;
  gap: 22px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--pc-cut)), calc(100% - var(--pc-cut)) 100%, 0 100%);
}

.page-contact .contact-card__row + .contact-card__row {
  padding-top: 20px;
  border-top: 1px dashed var(--line);
}

.page-contact .contact-card__label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-contact .contact-card__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1rem, 3.7vw, 1.35rem);
  line-height: 1.35;
  overflow-wrap: anywhere;
  color: var(--paper);
}

.page-contact .contact-card__value--tel {
  font-size: clamp(1.55rem, 7vw, 2.2rem);
  letter-spacing: 0.02em;
  color: var(--lime);
}

.page-contact .contact-card__hint {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
  max-width: 46ch;
}

.page-contact .hero-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  margin-top: 22px;
}

.page-contact .hero-links__note {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--orange);
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
}

.page-contact .contact-hero__flow {
  display: grid;
  gap: 20px;
  align-content: start;
}

.page-contact .flow-note {
  margin: 0;
  padding-left: 14px;
  border-left: 2px solid var(--lime);
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-contact .topic-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-contact .topic-chip {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  padding: 9px 13px;
  background: rgba(30, 26, 60, 0.68);
  border: 1px solid var(--line-strong);
  color: var(--paper);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: background 0.2s ease, color 0.2s ease;
}

.page-contact .topic-chip:hover,
.page-contact .topic-chip:focus-visible {
  background: var(--lime);
  color: var(--ink-green);
  border-color: var(--lime);
}

.page-contact .contact-topics,
.page-contact .contact-reply,
.page-contact .contact-partner,
.page-contact .contact-next {
  margin-top: clamp(52px, 7vw, 96px);
}

.page-contact .section-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-contact .section-head__index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--lime);
}

.page-contact .section-head__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.32rem, 3.6vw, 1.9rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.page-contact .section-lede {
  max-width: 62ch;
  margin: 16px 0 0;
  font-size: 15.5px;
  line-height: 1.82;
  opacity: 0.84;
}

.page-contact .topic-layout {
  display: grid;
  gap: 24px;
  margin-top: 26px;
}

.page-contact .topic-list {
  display: grid;
  gap: 12px;
}

.page-contact .topic-item {
  background: rgba(16, 28, 51, 0.78);
  border: 1px solid var(--line);
  padding: 16px 18px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}

.page-contact .topic-item[open] {
  border-color: var(--lime);
  background: rgba(30, 26, 60, 0.86);
}

.page-contact .topic-item__summary {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.02rem;
}

.page-contact .topic-item__summary::-webkit-details-marker {
  display: none;
}

.page-contact .topic-item__summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--font-mono);
  font-weight: 400;
  color: var(--lime);
}

.page-contact .topic-item[open] .topic-item__summary::after {
  content: "－";
}

.page-contact .topic-item__body p {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  opacity: 0.84;
}

.page-contact .topic-item__sample {
  display: inline-block;
  margin-top: 12px;
  padding: 7px 11px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink-green);
  background: var(--lime);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
}

.page-contact .topic-aside {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-contact .mail-guide {
  background: rgba(16, 28, 51, 0.62);
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--orange);
  padding: 16px 18px;
}

.page-contact .mail-guide__summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--orange);
}

.page-contact .mail-guide__summary::-webkit-details-marker {
  display: none;
}

.page-contact .mail-guide__steps {
  margin: 14px 0 0;
  padding-left: 20px;
  display: grid;
  gap: 10px;
  font-size: 14px;
  line-height: 1.76;
  opacity: 0.86;
}

.page-contact .reply-timeline {
  list-style: none;
  margin: 28px 0 0;
  padding: 0 0 0 22px;
  border-left: 1px solid var(--line-strong);
  display: grid;
  gap: 24px;
}

.page-contact .reply-step {
  position: relative;
  max-width: 62ch;
}

.page-contact .reply-step::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(200, 255, 61, 0.15);
}

.page-contact .reply-step__time {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-contact .reply-step p {
  margin: 7px 0 0;
  font-size: 15px;
  line-height: 1.8;
  opacity: 0.86;
}

.page-contact .reply-note {
  margin: 26px 0 0;
  max-width: 64ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .reply-note a {
  color: var(--lime);
  border-bottom: 1px solid currentColor;
}

.page-contact .partner-panel {
  position: relative;
  padding: clamp(24px, 4vw, 44px);
  background:
    radial-gradient(circle at 94% 8%, rgba(255, 138, 61, 0.16), transparent 48%),
    var(--ink-indigo);
  border: 1px solid var(--line-strong);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--pc-cut)), calc(100% - var(--pc-cut)) 100%, 0 100%);
}

.page-contact .partner-panel__title {
  margin: 16px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.28rem, 3.6vw, 1.78rem);
  line-height: 1.32;
  letter-spacing: -0.01em;
}

.page-contact .partner-panel__text {
  max-width: 64ch;
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.82;
  opacity: 0.86;
}

.page-contact .partner-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  max-width: 60ch;
}

.page-contact .partner-list li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.75;
}

.page-contact .partner-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 9px;
  height: 9px;
  background: var(--lime);
  transform: skewX(-12deg);
}

.page-contact .next-links {
  display: grid;
  gap: 12px;
  margin-top: 26px;
}

.page-contact .next-link {
  display: block;
  padding: 16px 18px;
  background: rgba(16, 28, 51, 0.55);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.page-contact .next-link:hover,
.page-contact .next-link:focus-visible {
  border-color: var(--lime);
  transform: translateY(-2px);
}

.page-contact .next-link__title {
  display: block;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1rem;
}

.page-contact .next-link__desc {
  display: block;
  margin-top: 6px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--mist);
}

@media (min-width: 720px) {
  .page-contact .next-links {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 900px) {
  .page-contact .topic-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 330px);
    gap: clamp(24px, 3vw, 40px);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-contact .contact-hero {
    grid-template-columns: minmax(0, 44fr) minmax(0, 56fr);
    align-items: start;
  }

  .page-contact .contact-hero__flow {
    padding-top: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .topic-chip,
  .page-contact .next-link {
    transition: none;
  }

  .page-contact .next-link:hover,
  .page-contact .next-link:focus-visible {
    transform: none;
  }
}
<<<PAGE_CSS_END>>>