.page-contact {
  --contact-label-w: calc(var(--space-8) + var(--space-6));
  --contact-line: var(--color-line);
}

/* ---------- 页面导语 ---------- */

.page-contact .contact-intro {
  max-width: var(--measure);
  padding: var(--space-6) 0 var(--space-8);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-contact .contact-intro__kicker {
  margin: 0 0 var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.page-contact h1 {
  margin: 0 0 var(--space-4);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-contact .contact-intro__lede {
  margin: 0 0 var(--space-4);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-contact .contact-intro__notice {
  margin: 0;
  padding-left: var(--space-2);
  border-left: 2px solid var(--color-primary);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-soft);
}

/* ---------- 渠道速览 ---------- */

.page-contact .media-block {
  margin: 0;
}

.page-contact .media-block .media {
  margin: 0;
}

.page-contact .media-block .media__note {
  margin: var(--space-2) 0 0;
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-ink-muted);
}

.page-contact .channel-glance {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .channel-glance__item {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-1) var(--space-3);
  padding: var(--space-4) var(--space-2) var(--space-4) var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
  transition: background-color 160ms ease-out;
}

.page-contact .channel-glance__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: var(--space-4);
  bottom: var(--space-4);
  width: 2px;
  background-color: var(--color-primary);
  transition: width 160ms ease-out, background-color 160ms ease-out;
}

.page-contact .channel-glance__item:hover,
.page-contact .channel-glance__item:focus-within {
  background-color: var(--color-highlight);
}

.page-contact .channel-glance__item:hover::before,
.page-contact .channel-glance__item:focus-within::before {
  width: 4px;
  background-color: var(--color-accent);
}

.page-contact .channel-glance__item:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.page-contact .channel-glance__index {
  margin: 0;
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
}

.page-contact .channel-glance__body {
  min-width: 0;
}

.page-contact .channel-glance__name {
  margin: 0 0 var(--space-1);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-contact .channel-glance__value {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-variant-numeric: tabular-nums lining-nums;
  letter-spacing: 0.02em;
  color: var(--color-ink);
  word-break: break-word;
  overflow-wrap: anywhere;
}

.page-contact .channel-glance__note {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.65;
  color: var(--color-ink-soft);
}

/* ---------- 渠道详情 ---------- */

.page-contact .channel-detail {
  padding-top: var(--space-6);
}

.page-contact .channel-detail + .channel-detail {
  margin-top: var(--space-6);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-contact .channel-detail__title {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  margin: 0 0 var(--space-2);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-contact .channel-detail__num {
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-ink-muted);
}

.page-contact .channel-detail__value {
  margin: 0 0 var(--space-4);
  padding-left: var(--space-2);
  border-left: 2px solid var(--color-accent);
  font-size: var(--text-lg);
  font-variant-numeric: tabular-nums lining-nums;
  letter-spacing: 0.02em;
  color: var(--color-ink);
  word-break: break-word;
  overflow-wrap: anywhere;
}

.page-contact .channel-detail__aside {
  margin: var(--space-4) 0 0;
  padding-left: var(--space-2);
  border-left: 2px solid var(--color-primary-soft);
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

/* ---------- 字段网格 ---------- */

.page-contact .field-grid {
  margin: 0;
  border-top: var(--border-thin) solid var(--contact-line);
}

.page-contact .field-grid__row {
  display: grid;
  gap: var(--space-1) var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: var(--border-thin) solid var(--contact-line);
}

.page-contact .field-grid__key {
  margin: 0;
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

.page-contact .field-grid__value {
  margin: 0;
  min-width: 0;
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--color-ink);
}

.page-contact .field-grid__row--na .field-grid__value {
  color: var(--color-ink-muted);
  text-decoration: line-through;
  text-decoration-thickness: 1px;
  text-decoration-color: var(--color-line);
}

/* ---------- 页脚固定入口（反色收束） ---------- */

.page-contact .contact-entry {
  color: var(--color-contrast-ink);
}

.page-contact .contact-entry__index {
  margin: 0 0 var(--space-3);
  font-size: var(--text-xs);
  letter-spacing: 0.24em;
  color: var(--color-contrast-accent);
}

.page-contact .contact-entry__title {
  margin: 0 0 var(--space-3);
  padding-left: var(--space-3);
  border-left: 3px solid var(--color-contrast-accent);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
}

.page-contact .contact-entry__lede {
  margin: 0 0 var(--space-6);
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

.page-contact .field-grid--on-dark {
  border-top-color: var(--color-contrast-line);
}

.page-contact .field-grid--on-dark .field-grid__row {
  border-bottom-color: var(--color-contrast-line);
}

.page-contact .field-grid--on-dark .field-grid__key {
  color: var(--color-contrast-ink);
  opacity: 0.6;
}

.page-contact .field-grid--on-dark .field-grid__value {
  color: var(--color-contrast-ink);
}

.page-contact .contact-entry__media .media {
  margin: 0;
}

.page-contact .contact-entry__media .media__note {
  margin: var(--space-2) 0 0;
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-contrast-ink);
  opacity: 0.66;
}

/* ---------- 断点 ---------- */

@media (min-width: 720px) {
  .page-contact .contact-intro {
    padding: var(--space-8) 0 var(--space-8);
  }

  .page-contact h1 {
    font-size: var(--text-3xl);
  }

  .page-contact .field-grid__row {
    grid-template-columns: var(--contact-label-w) 1fr;
    align-items: start;
    gap: 0 var(--space-4);
  }

  .page-contact .field-grid__key {
    padding-top: 0.35em;
  }

  .page-contact .channel-detail__aside {
    margin-left: calc(var(--contact-label-w) + var(--space-4));
  }
}

@media (min-width: 860px) {
  .page-contact .grid--7-5 {
    gap: var(--space-6);
    align-items: start;
  }

  .page-contact .channel-glance__item {
    padding-right: var(--space-3);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-glance__item,
  .page-contact .channel-glance__item::before {
    transition: none;
  }
}