.page-contact {
  --contact-label-col: 7.5rem;
  --contact-num-col: 3.2rem;
}

/* ---------- 面包屑与首屏 ---------- */
.page-contact .breadcrumb {
  margin-bottom: var(--space-3);
}

.page-contact .contact-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  align-items: start;
}

.page-contact .contact-hero__eyebrow {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-accent);
}

.page-contact .contact-hero__title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-3xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  max-width: 22ch;
}

.page-contact .lead {
  max-width: var(--measure);
  margin: 0;
  color: var(--color-ink-soft);
  line-height: var(--leading-body);
}

.page-contact .contact-kv {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  border-top: var(--border-thin) solid var(--color-primary);
}

.page-contact .contact-kv li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  border-bottom: 1px dashed var(--color-line);
}

.page-contact .contact-kv__label {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-contact .contact-kv__value {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-accent);
  text-align: right;
}

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

/* ---------- 图片框通用保障 ---------- */
.page-contact .media-frame__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.page-contact .media-frame__caption {
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  line-height: 1.6;
}

/* ---------- 章节头 ---------- */
.page-contact .section-head {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.page-contact .section-head__text {
  display: flex;
  flex-direction: column;
  gap: calc(var(--space-1) / 2);
  min-width: 0;
}

.page-contact .section-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-primary-ink);
  background: var(--color-primary);
  border-radius: var(--radius-sm);
  padding: 4px var(--space-1);
  line-height: 1.2;
}

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

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

/* ---------- 对照表 ---------- */
.page-contact .contact-table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  background: var(--color-surface);
}

.page-contact .contact-table caption {
  caption-side: top;
  text-align: left;
  padding: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-contact .contact-table thead th {
  background: var(--color-surface-deep);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-ink);
  border-bottom: var(--border-thin) solid var(--color-primary);
}

.page-contact .contact-table th,
.page-contact .contact-table td {
  text-align: left;
  vertical-align: top;
  padding: var(--space-2);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
  border-bottom: 1px dashed var(--color-line);
  overflow-wrap: anywhere;
}

.page-contact .contact-table tbody th {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  background: var(--color-surface-alt);
  white-space: nowrap;
  border-left: calc(var(--border-thin) * 2) solid var(--color-primary);
}

/* ---------- 通道筛选 ---------- */
.page-contact .contact-filter {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin: 0 0 var(--space-4);
  padding: var(--space-2) 0;
  border-top: 1px dashed var(--color-line);
  border-bottom: 1px dashed var(--color-line);
}

.page-contact .contact-filter .filter-btn {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 700;
  padding: var(--space-1) var(--space-3);
  color: var(--color-ink-soft);
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 120ms ease, border-color 120ms ease,
    background-color 120ms ease, color 120ms ease;
}

.page-contact .contact-filter .filter-btn:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-2);
  transform: translate(-1px, -1px);
}

.page-contact .contact-filter .filter-btn[aria-pressed="true"] {
  color: var(--color-primary-ink);
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.page-contact .contact-filter .filter-btn:focus-visible {
  outline: var(--border-thin) solid var(--color-focus);
  outline-offset: 2px;
}

.page-contact .filter-empty {
  margin: 0;
  padding: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  border: 1px dashed var(--color-line);
  border-radius: var(--radius-sm);
}

/* ---------- 通道面板 ---------- */
.page-contact .channel-panels {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

.page-contact .channel-card {
  min-width: 0;
  padding: var(--space-3);
  background: var(--color-surface-alt);
  border: var(--border-thin) solid var(--color-line);
  border-left: calc(var(--border-thin) * 2) solid var(--color-primary);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
  transition: box-shadow 120ms ease, transform 120ms ease, border-color 120ms ease;
}

.page-contact .channel-card:hover {
  box-shadow: var(--shadow-2);
  transform: translateY(-2px);
}

.page-contact .channel-card__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-1);
  padding-bottom: var(--space-2);
  margin-bottom: var(--space-1);
  border-bottom: 1px dashed var(--color-line);
}

.page-contact .channel-card__title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

/* ---------- 字段行 ---------- */
.page-contact .field-list {
  display: grid;
  gap: 0;
}

.page-contact .field {
  display: grid;
  grid-template-columns: 1fr;
  gap: calc(var(--space-1) / 2);
  padding: var(--space-2) 0;
  border-bottom: 1px dashed var(--color-line);
}

.page-contact .field:last-child {
  border-bottom: 0;
  padding-bottom: var(--space-1);
}

.page-contact .field__label {
  justify-self: start;
  padding: 3px var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-ink-soft);
  background: var(--color-surface-deep);
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

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

.page-contact .field__value .mono {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-accent);
}

/* ---------- 折叠细节 ---------- */
.page-contact .field-more {
  margin-top: var(--space-2);
  padding-top: var(--space-2);
  border-top: 1px dashed var(--color-line);
}

.page-contact .field-more summary {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-accent);
}

.page-contact .field-more summary::-webkit-details-marker {
  display: none;
}

.page-contact .field-more summary::before {
  content: "[+]";
  flex: 0 0 auto;
}

.page-contact .field-more[open] summary::before {
  content: "[-]";
}

.page-contact .field-more summary:focus-visible {
  outline: var(--border-thin) solid var(--color-focus);
  outline-offset: 2px;
}

.page-contact .mail-outline {
  list-style: none;
  margin: var(--space-2) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-1);
}

.page-contact .mail-outline li {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr);
  gap: var(--space-1);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-contact .mail-outline .mono {
  font-family: var(--font-mono);
  color: var(--color-primary);
  font-weight: 700;
}

/* ---------- 资料准备 ---------- */
.page-contact .prepare-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  align-items: start;
}

.page-contact .prepare-figure {
  margin: 0;
}

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

.page-contact .bracket-list > li {
  display: grid;
  grid-template-columns: var(--contact-num-col) minmax(0, 1fr);
  gap: var(--space-2);
  padding: var(--space-2) 0;
  border-top: 1px dashed var(--color-line);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
  overflow-wrap: anywhere;
}

.page-contact .bracket-list > li:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-contact .bracket-list strong {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-contact .bracket {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-primary);
  border-left: var(--border-thin) solid var(--color-primary);
  padding-left: calc(var(--space-1) / 2);
}

.page-contact .bracket-list--refused {
  margin-top: 0;
  padding: var(--space-3);
  background: var(--color-surface-alt);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
}

.page-contact .bracket-list--refused .bracket {
  color: var(--color-accent);
  border-left-color: var(--color-accent);
}

/* ---------- 相关入口 ---------- */
.page-contact .next-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
}

.page-contact .next-item {
  display: grid;
  grid-template-columns: var(--contact-num-col) minmax(0, 1fr);
  grid-template-areas:
    "num title"
    "desc desc";
  align-items: baseline;
  gap: calc(var(--space-1) / 2) var(--space-2);
  padding: var(--space-3);
  text-decoration: none;
  color: inherit;
  background: var(--color-surface);
  border: var(--border-thin) dashed var(--color-line);
  border-radius: var(--radius-md);
  transition: border-color 120ms ease, box-shadow 120ms ease, transform 120ms ease,
    background-color 120ms ease;
}

.page-contact .next-item:hover {
  border-style: solid;
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
  box-shadow: var(--shadow-2);
  transform: translateY(-2px);
}

.page-contact .next-item:focus-visible {
  outline: var(--border-thin) solid var(--color-focus);
  outline-offset: 2px;
}

.page-contact .next-item__num {
  grid-area: num;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-accent);
}

.page-contact .next-item__title {
  grid-area: title;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  color: var(--color-ink);
}

.page-contact .next-item__desc {
  grid-area: desc;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 断点 ---------- */
@media (min-width: 560px) {
  .page-contact .field {
    grid-template-columns: var(--contact-label-col) minmax(0, 1fr);
    align-items: baseline;
    gap: var(--space-2);
  }

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

  .page-contact .next-item {
    grid-template-areas:
      "num title"
      "desc desc";
  }
}

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

  .page-contact .contact-hero__title {
    font-size: var(--text-4xl);
  }

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

@media (min-width: 980px) {
  .page-contact .channel-panels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .channel-panels > .channel-card:first-child {
    grid-column: 1 / -1;
  }

  .page-contact .channel-panels > .channel-card:first-child .field-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: var(--space-4);
  }

  .page-contact .channel-panels > .channel-card:first-child .field:nth-last-child(2) {
    border-bottom: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .next-item,
  .page-contact .contact-filter .filter-btn {
    transition: none;
  }

  .page-contact .channel-card:hover,
  .page-contact .next-item:hover,
  .page-contact .contact-filter .filter-btn:hover {
    transform: none;
  }
}