.page-contact {
  --ct-line-soft: color-mix(in srgb, var(--color-line) 65%, transparent);
  --ct-accent-tint: color-mix(in srgb, var(--color-accent) 38%, transparent);
}

/* ---------- 首屏 ---------- */
.page-contact .ct-intro__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  align-items: center;
}

.page-contact .ct-intro__text {
  max-width: var(--measure);
}

.page-contact .ct-kicker {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
}

.page-contact .ct-intro__title {
  margin: 0 0 var(--space-3);
  font-size: var(--text-3xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  font-weight: var(--weight-heading);
}

.page-contact .ct-intro__figure {
  margin: 0;
}

.page-contact .ct-intro__figure img,
.page-contact .ct-letter__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: 0 0 0 var(--border-thin) var(--ct-line-soft);
}

.page-contact .ct-intro__cap {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

/* ---------- 渠道速览（反相对照区块） ---------- */
.page-contact .ct-overview {
  padding: var(--space-6) var(--space-3);
  border-radius: var(--radius-lg);
}

.page-contact .ct-overview__head {
  max-width: var(--measure);
  margin-bottom: var(--space-4);
}

.page-contact .pg-contrast .ct-kicker {
  color: var(--color-contrast-accent);
}

.page-contact .ct-overview__title {
  margin: 0;
  color: var(--color-contrast-ink);
}

.page-contact .ct-overview__lede {
  margin: var(--space-2) 0 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

.page-contact .ct-table {
  display: block;
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
}

.page-contact .ct-table caption {
  display: block;
  caption-side: top;
  text-align: left;
  padding-bottom: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-contrast-accent);
}

.page-contact .ct-table thead {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.page-contact .ct-table tbody,
.page-contact .ct-table tr,
.page-contact .ct-table td {
  display: block;
  width: 100%;
}

.page-contact .ct-table tr {
  padding: var(--space-3) 0;
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.page-contact .ct-table tr:last-child {
  border-bottom: 0;
}

.page-contact .ct-table td {
  padding: var(--space-1) 0;
  border: 0;
  line-height: var(--leading-body);
}

.page-contact .ct-table td::before {
  content: attr(data-label);
  display: block;
  margin-bottom: calc(var(--space-1) / 2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-contrast-accent);
}

.page-contact .ct-cell--name {
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
}

.page-contact .ct-type {
  display: inline-block;
  margin-left: var(--space-1);
  padding: calc(var(--space-1) / 4) var(--space-1);
  border: var(--border-thin) solid var(--color-contrast-accent);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-body);
  letter-spacing: 0.08em;
  color: var(--color-contrast-accent);
  vertical-align: middle;
}

.page-contact .ct-addr {
  font-family: var(--font-mono);
  letter-spacing: -0.01em;
  overflow-wrap: anywhere;
}

.page-contact .ct-cell--warn {
  color: var(--color-contrast-accent);
}

/* ---------- 两类渠道细节 ---------- */
.page-contact .ct-detail__title {
  margin: 0 0 var(--space-4);
}

.page-contact .ct-channels {
  row-gap: var(--space-6);
}

.page-contact .ct-channel {
  padding-top: var(--space-4);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-contact .ct-channel--primary {
  padding-left: var(--space-4);
  border-left: var(--border-thick) solid var(--color-primary);
}

.page-contact .ct-channel__index {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.14em;
  color: var(--color-ink-muted);
}

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

.page-contact .ct-channel__addr {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  letter-spacing: -0.01em;
  color: var(--color-ink);
  overflow-wrap: anywhere;
}

.page-contact .ct-cadence {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  margin: 0 0 var(--space-3);
  padding: calc(var(--space-1) / 2) var(--space-2);
  border: var(--border-thin) solid var(--ct-accent-tint);
  border-radius: var(--radius-pill);
  background: color-mix(in srgb, var(--color-accent) 6%, transparent);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
}

.page-contact .ct-cadence .pg-dot {
  flex: none;
  width: var(--space-1);
  height: var(--space-1);
  border-radius: 50%;
  background: var(--color-accent);
}

.page-contact .ct-sub + .ct-sub {
  margin-top: var(--space-4);
}

.page-contact .ct-sub__name {
  margin: 0 0 var(--space-2);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
}

.page-contact .ct-sub__addr {
  display: block;
  margin-top: calc(var(--space-1) / 2);
  font-family: var(--font-mono);
  font-size: var(--text-base);
  font-weight: var(--weight-body);
  letter-spacing: -0.01em;
  color: var(--color-ink);
  overflow-wrap: anywhere;
}

.page-contact .ct-fields {
  margin: var(--space-3) 0 0;
}

.page-contact .ct-fields__row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-1) var(--space-3);
  align-items: baseline;
  padding: var(--space-2) 0;
  border-bottom: var(--border-thin) solid var(--ct-line-soft);
}

.page-contact .ct-fields__row:last-child {
  border-bottom: 0;
}

.page-contact .ct-fields dt {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-soft);
  white-space: nowrap;
}

.page-contact .ct-fields dd {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
  overflow-wrap: anywhere;
}

.page-contact .ct-hint {
  margin-top: var(--space-2);
}

/* ---------- 来函与备案 ---------- */
.page-contact .ct-letter {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  align-items: start;
}

.page-contact .ct-letter__figure {
  margin: 0;
}

.page-contact .ct-letter__title {
  margin: 0 0 var(--space-2);
}

.page-contact .ct-icp {
  font-family: var(--font-mono);
  font-weight: var(--weight-body);
  letter-spacing: 0.04em;
  color: var(--color-ink-soft);
}

/* ---------- 开问之前 ---------- */
.page-contact .ct-ask__head {
  max-width: var(--measure);
}

.page-contact .ct-ask__head .pg-title-md {
  margin: 0;
}

.page-contact .ct-ask__lede {
  margin: var(--space-2) 0 0;
}

.page-contact .ct-ask__list {
  margin-top: var(--space-4);
}

.page-contact .ct-fold {
  border-top: var(--border-thin) solid var(--color-line);
}

.page-contact .ct-fold:last-of-type {
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-contact .ct-fold summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  cursor: pointer;
  list-style: none;
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
}

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

.page-contact .ct-fold summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: var(--weight-body);
  color: var(--color-accent);
}

.page-contact .ct-fold[open] summary::after {
  content: "−";
}

.page-contact .ct-fold .pg-fold__body {
  padding: 0 0 var(--space-3);
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-contact .ct-ask__foot {
  margin-top: var(--space-3);
  max-width: var(--measure);
}

/* ---------- 页尾提示 ---------- */
.page-contact .ct-tail__inner {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  align-items: baseline;
  justify-content: space-between;
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
}

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

.page-contact .ct-tail__stamp {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 720px) {
  .page-contact .ct-overview {
    padding: var(--space-8) var(--space-6);
  }

  .page-contact .ct-table {
    display: table;
  }

  .page-contact .ct-table caption {
    caption-side: top;
  }

  .page-contact .ct-table thead {
    display: table-header-group;
    position: static;
    width: auto;
    height: auto;
    overflow: visible;
    clip-path: none;
    white-space: normal;
  }

  .page-contact .ct-table tbody {
    display: table-row-group;
  }

  .page-contact .ct-table tr {
    display: table-row;
    padding: 0;
    border-bottom: 0;
  }

  .page-contact .ct-table th,
  .page-contact .ct-table td {
    display: table-cell;
    width: auto;
    padding: var(--space-2) var(--space-2) var(--space-2) 0;
    border-bottom: var(--border-thin) solid var(--color-contrast-line);
    vertical-align: top;
  }

  .page-contact .ct-table th {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    font-weight: var(--weight-body);
    letter-spacing: 0.1em;
    color: var(--color-contrast-ink);
    white-space: nowrap;
    border-bottom: var(--border-thick) solid var(--color-contrast-ink);
  }

  .page-contact .ct-table tbody tr:last-child td {
    border-bottom: 0;
  }

  .page-contact .ct-table td::before {
    content: none;
  }

  .page-contact .ct-table tbody tr {
    transition: background-color 180ms ease;
  }

  .page-contact .ct-table tbody tr:hover {
    background: color-mix(in srgb, var(--color-contrast-accent) 10%, transparent);
  }
}

@media (min-width: 720px) and (hover: hover) {
  .page-contact .ct-table tbody tr .ct-cell--warn {
    opacity: 0.5;
    transition: opacity 180ms ease;
  }

  .page-contact .ct-table tbody tr:hover .ct-cell--warn,
  .page-contact .ct-table tbody tr:focus-within .ct-cell--warn {
    opacity: 1;
  }
}

@media (min-width: 900px) {
  .page-contact .ct-intro__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-6);
  }

  .page-contact .ct-letter {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: var(--space-6);
  }

  .page-contact .ct-intro__figure {
    justify-self: end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .ct-table tbody tr,
  .page-contact .ct-table tbody tr .ct-cell--warn {
    transition: none;
  }
}
</main>