.page-contact {
  --pc-pad: clamp(18px, 3.4vw, 34px);
  --pc-soft: #0A2620;
  display: block;
}

.page-contact h1,
.page-contact h2,
.page-contact h3 {
  font-family: var(--font-display);
  color: var(--warm);
  font-weight: 800;
}

.page-contact h1 {
  font-size: clamp(34px, 6.6vw, 62px);
  line-height: 1.02;
  letter-spacing: -0.01em;
  margin: 10px 0 0;
}

.page-contact h2 {
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1.08;
  margin: 8px 0 0;
}

.page-contact h3 {
  font-size: 20px;
  line-height: 1.2;
  margin: 0;
}

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

/* 首屏 */
.page-contact .contact-hero__grid {
  display: grid;
  gap: var(--gut);
}

.page-contact .contact-hero__lead .lede {
  max-width: 34ch;
  margin-top: 14px;
  color: var(--muted);
}

.page-contact .contact-quick {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-contact .contact-quick__item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-quick__key {
  font-size: 14px;
  color: var(--muted);
}

.page-contact .contact-quick__val {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--cyan);
  letter-spacing: 0.01em;
}

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

.page-contact .media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-contact .media--wide .media__inner {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-contact .media--wide img {
  height: 100%;
}

.page-contact .media__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* 章节抬头共用 */
.page-contact .direction__head {
  max-width: 62ch;
  margin-bottom: 26px;
}

.page-contact .direction__head .section-head__note {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
}

/* 合作方向 */
.page-contact .direction__grid {
  display: grid;
  gap: var(--gut);
}

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

.page-contact .media--tall .media__inner {
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-contact .media--tall img {
  height: 100%;
}

.page-contact .dir-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .dir-card {
  position: relative;
  padding: 20px 18px 18px;
  background: var(--board);
  border: 1px solid var(--line);
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}

.page-contact .dir-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 46px;
  height: 3px;
  background: var(--cyan);
  transition: width 160ms ease, background 160ms ease;
}

.page-contact .dir-card--alt::before {
  background: var(--orange);
}

.page-contact .dir-card:hover,
.page-contact .dir-card:focus-within {
  border-color: var(--cyan);
  background: var(--pc-soft);
  transform: translateY(-2px);
}

.page-contact .dir-card:hover::before {
  width: 100%;
}

.page-contact .dir-card__num {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-contact .dir-card__desc {
  margin: 8px 0 12px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .dir-card__who {
  margin: 0;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  line-height: 1.6;
  color: var(--cyan);
}

.page-contact .dir-card--alt .dir-card__who {
  color: var(--orange);
}

/* 联系方式 */
.page-contact .channel-shell {
  display: grid;
  gap: 16px;
}

.page-contact .channel-main {
  padding: var(--pc-pad);
  background: var(--board);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

.page-contact .channel-main__key {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-contact .channel-main__mail {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(18px, 3.9vw, 40px);
  line-height: 1.2;
  color: var(--cyan);
  text-decoration: none;
  overflow-wrap: anywhere;
  border-bottom: 2px solid transparent;
  transition: border-color 160ms ease;
}

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

.page-contact .channel-main__note {
  margin: 16px 0 0;
  max-width: 48ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .channel-side {
  display: grid;
  gap: 16px;
}

.page-contact .channel-side__card {
  padding: 20px var(--pc-pad);
  background: var(--pc-soft);
  border: 1px solid var(--line);
  transition: border-color 160ms ease;
}

.page-contact .channel-side__card:hover {
  border-color: var(--cyan);
}

.page-contact .channel-side__key {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-contact .channel-side__tel {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 5vw, 38px);
  letter-spacing: 0.02em;
  color: var(--warm);
  text-decoration: none;
  border-bottom: 2px solid var(--orange);
  transition: color 160ms ease;
}

.page-contact .channel-side__tel:hover {
  color: var(--orange);
}

.page-contact .channel-side__addr {
  display: inline-block;
  margin: 0;
  padding: 8px 12px;
  background: var(--pale);
  color: var(--charcoal);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.5;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
}

.page-contact .channel-side__hint {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* 响应节奏 */
.page-contact .response__grid {
  display: grid;
  gap: var(--gut);
}

.page-contact .response__head .section-head__note {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
}

.page-contact .resp-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-contact .resp-item {
  display: grid;
  grid-template-columns: 16px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .resp-item__dot {
  width: 12px;
  height: 12px;
  margin-top: 6px;
  background: var(--cyan);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}

.page-contact .resp-item--accent .resp-item__dot {
  background: var(--orange);
}

.page-contact .resp-item__time {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-contact .resp-item--accent .resp-item__time {
  color: var(--orange);
}

.page-contact .resp-item__title {
  margin: 4px 0 6px;
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--warm);
}

.page-contact .resp-item__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

/* 来信清单 */
.page-contact .check-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .check-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 14px 16px;
  background: var(--pale);
  color: var(--charcoal);
  border-left: 3px solid var(--line);
  cursor: pointer;
  transition: border-color 160ms ease, transform 160ms ease;
}

.page-contact .check-item:hover,
.page-contact .check-item:focus-within {
  border-left-color: var(--orange);
  transform: translateX(2px);
}

.page-contact .check-item input {
  width: 20px;
  height: 20px;
  margin: 2px 0 0;
  accent-color: var(--board);
}

.page-contact .check-item__body strong {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--charcoal);
}

.page-contact .check-item__body span {
  display: block;
  margin-top: 4px;
  font-size: 14px;
  line-height: 1.65;
  color: #3A4741;
}

/* 支持 */
.page-contact .support-grid {
  display: grid;
  gap: 16px;
}

.page-contact .support-panel {
  padding: var(--pc-pad);
  background: var(--pc-soft);
  border: 1px solid var(--line);
}

.page-contact .support-panel--links {
  background: var(--board);
}

.page-contact .support-panel__title {
  font-size: 19px;
  line-height: 1.35;
  margin-bottom: 14px;
}

.page-contact .support-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .support-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .support-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  background: var(--orange);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}

.page-contact .support-panel__note {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--cyan);
}

.page-contact .next-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-contact .next-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  color: var(--warm);
  font-size: 15px;
  line-height: 1.5;
  text-decoration: none;
  transition: border-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.page-contact .next-list a span {
  font-family: var(--font-mono);
  color: var(--cyan);
}

.page-contact .next-list a:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  transform: translateX(2px);
}

/* 窄屏保底 */
@media (max-width: 400px) {
  .page-contact .channel-main__mail {
    font-size: 17px;
  }
}

@media (min-width: 640px) {
  .page-contact .dir-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: end;
    gap: calc(var(--gut) * 1.4);
  }

  .page-contact .channel-shell {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: stretch;
  }

  .page-contact .channel-side {
    align-content: stretch;
  }

  .page-contact .response__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: calc(var(--gut) * 1.4);
  }

  .page-contact .support-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: var(--gut);
  }
}

@media (min-width: 1000px) {
  .page-contact .direction__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
    gap: calc(var(--gut) * 1.2);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .dir-card,
  .page-contact .dir-card::before,
  .page-contact .check-item,
  .page-contact .next-list a,
  .page-contact .channel-side__card {
    transition: none;
  }

  .page-contact .dir-card:hover,
  .page-contact .check-item:hover,
  .page-contact .next-list a:hover {
    transform: none;
  }
}