.page-contact {
  padding-bottom: var(--section-y);
}

.page-contact .breadcrumb {
  padding-top: var(--space-3);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-intro {
  max-width: 780px;
  margin: 0 auto;
  padding: var(--space-6) 0 0;
  text-align: center;
}

.page-contact .contact-intro__title {
  margin: var(--space-2) 0 0;
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  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: var(--space-3) auto 0;
  color: var(--color-ink-soft);
  text-align: left;
}

/* ---------- 区块节奏 ---------- */
.page-contact .contact-block {
  padding-top: var(--section-y);
}

.page-contact .contact-block--tight {
  padding-top: var(--space-8);
}

/* ---------- 渠道索引 ---------- */
.page-contact .channel-index {
  max-width: 780px;
  margin: var(--space-6) auto 0;
}

.page-contact .channel-row {
  position: relative;
  padding: var(--space-4) var(--space-2);
  text-align: center;
  transition: background-color 200ms ease-out;
}

.page-contact .channel-row::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: 0;
  height: var(--border-thick);
  background: var(--color-primary);
  transform: translateX(-50%);
  transition: width 200ms ease-out;
}

.page-contact .channel-row:hover,
.page-contact .channel-row:focus-within {
  background: var(--color-primary-soft);
}

.page-contact .channel-row:hover::before,
.page-contact .channel-row:focus-within::before {
  width: var(--space-6);
}

.page-contact .channel-row__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: center;
  gap: var(--space-2);
  margin: 0;
}

.page-contact .channel-row__no {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.16em;
  color: var(--color-primary);
}

.page-contact .channel-row__label {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-contact .channel-row__value {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  margin: var(--space-2) 0 0;
}

.page-contact .channel-row__text {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  line-height: 1.6;
  color: var(--color-ink);
  overflow-wrap: anywhere;
}

.page-contact .channel-row__text--mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.page-contact .channel-row__scope {
  margin: var(--space-2) 0 0;
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

.page-contact .channel-sep {
  height: calc(var(--border-thin) * 5);
  border-top: var(--border-thin) solid var(--color-line);
  border-bottom: var(--border-thin) solid var(--color-line);
}

/* ---------- 首图 ---------- */
.page-contact .contact-figure {
  margin: var(--space-6) auto 0;
  max-width: 900px;
}

.page-contact .contact-figure__caption {
  margin: var(--space-2) 0 0;
  font-size: var(--text-xs);
  line-height: 1.75;
  color: var(--color-ink-muted);
  text-align: center;
}

/* ---------- 渠道条目 ---------- */
.page-contact .channel-details {
  margin-top: var(--space-6);
  display: grid;
  gap: var(--space-8);
}

.page-contact .channel-detail {
  display: grid;
  gap: var(--space-3);
}

.page-contact .channel-detail__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2);
  padding-bottom: var(--space-2);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-contact .channel-detail__no {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.16em;
  color: var(--color-primary);
}

.page-contact .channel-detail__title {
  margin: 0;
  font-family: var(--font-heading);
  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-fields {
  margin: 0;
  display: grid;
  gap: var(--space-3);
}

.page-contact .channel-fields__row {
  display: grid;
  gap: var(--space-1);
}

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

.page-contact .channel-fields__row dt::before {
  content: "";
  display: inline-block;
  width: var(--space-2);
  height: var(--border-thin);
  margin-right: var(--space-1);
  vertical-align: middle;
  background: var(--color-primary);
}

.page-contact .channel-fields__row dd {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-contact .channel-detail__split {
  display: grid;
  gap: var(--space-4);
}

.page-contact .channel-detail__figure {
  margin: 0;
}

/* ---------- 响应节奏 ---------- */
.page-contact .rhythm-grid {
  margin-top: var(--space-6);
}

.page-contact .rhythm-lead {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-lg);
  line-height: 1.8;
  color: var(--color-ink-soft);
}

.page-contact .rhythm-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.page-contact .rhythm-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-2);
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-contact .rhythm-item:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-contact .rhythm-item__no {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-primary);
  padding-top: 0.4em;
}

.page-contact .rhythm-item__body {
  display: block;
}

.page-contact .rhythm-item__title {
  display: block;
  margin-bottom: var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-contact .rhythm-item__text {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 深色区块：不在受理范围 ---------- */
.page-contact .out-of-scope {
  padding: var(--space-8) var(--space-4);
}

.page-contact .out-of-scope__inner {
  max-width: var(--container);
  margin: 0 auto;
}

.page-contact .out-of-scope__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.22em;
  color: var(--color-contrast-accent);
}

.page-contact .out-of-scope__title {
  margin: var(--space-2) 0 0;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
}

.page-contact .out-of-scope__note {
  margin: var(--space-2) 0 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

.page-contact .scope-list {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.page-contact .scope-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-left: var(--border-thick) solid var(--color-contrast-accent);
  background: color-mix(in srgb, var(--color-contrast-line) 42%, transparent);
}

.page-contact .scope-item__no {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-contrast-accent);
  padding-top: 0.3em;
}

.page-contact .scope-item__text {
  font-size: var(--text-sm);
  line-height: 1.8;
  color: var(--color-contrast-ink);
}

/* ---------- 备案信息 ---------- */
.page-contact .registry {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}

.page-contact .registry__title {
  margin: var(--space-2) 0 0;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-contact .registry .keyline {
  display: block;
  margin: var(--space-3) auto;
}

.page-contact .registry__list {
  margin: var(--space-4) 0 0;
  display: grid;
  gap: 0;
}

.page-contact .registry__row {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-3) 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-contact .registry__row:last-child {
  border-bottom: var(--border-thin) solid var(--color-line);
}

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

.page-contact .registry__row dd {
  margin: 0;
  font-size: var(--text-base);
  font-variant-numeric: tabular-nums;
  line-height: 1.7;
  color: var(--color-ink);
  overflow-wrap: anywhere;
}

.page-contact .registry__note {
  margin: var(--space-4) auto 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-contact .registry__note a {
  color: var(--color-ink);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-primary);
  transition: color 180ms ease-out;
}

.page-contact .registry__note a:hover,
.page-contact .registry__note a:focus-visible {
  color: var(--color-primary);
}

/* ---------- 焦点反馈 ---------- */
.page-contact .channel-row__copy:focus-visible,
.page-contact .channel-row a:focus-visible,
.page-contact .registry__note a:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: 2px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-contact .contact-intro__title {
    font-size: var(--text-4xl);
  }

  .page-contact .contact-block--tight {
    padding-top: var(--section-y);
  }

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

  .page-contact .registry__row {
    grid-template-columns: 200px 1fr;
    align-items: baseline;
    gap: var(--space-3);
  }

  .page-contact .registry__row dt {
    text-align: right;
  }

  .page-contact .registry__row dd {
    text-align: left;
  }
}

@media (min-width: 900px) {
  .page-contact .channel-detail--split .channel-detail__split {
    grid-template-columns: 7fr 5fr;
    gap: var(--space-6);
    align-items: start;
  }

  .page-contact .out-of-scope {
    padding: var(--space-8) var(--space-6);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-row,
  .page-contact .channel-row::before,
  .page-contact .registry__note a {
    transition: none;
  }
}
</main>