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

/* 面包屑 */
.page-contact .breadcrumb {
  padding: var(--space-3) 0 0;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}
.page-contact .crumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-contact .crumb-list li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--color-line);
}
.page-contact .crumb-list a {
  color: var(--color-primary);
  text-decoration: none;
}
.page-contact .crumb-list a:hover {
  text-decoration: underline;
}

/* 首屏 */
.page-contact .contact-intro {
  padding: var(--space-6) 0 var(--space-8);
}
.page-contact .intro-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  align-items: start;
}
.page-contact .contact-rule {
  display: block;
  width: 96px;
  height: 3px;
  margin-bottom: var(--space-2);
  border-radius: var(--radius-pill);
  background: repeating-linear-gradient(
    90deg,
    var(--color-accent) 0 14px,
    transparent 14px 24px
  );
}
.page-contact .intro-copy h1 {
  margin: var(--space-2) 0 var(--space-3);
  max-width: 19ch;
  font-family: var(--font-heading);
  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 .intro-copy .lead {
  max-width: var(--measure);
  color: var(--color-ink-soft);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

.page-contact .intro-facts {
  padding: var(--space-3) var(--space-4);
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-lg);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  box-shadow: var(--shadow-1);
}
.page-contact .fact {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-contrast-line);
}
.page-contact .fact:first-child { padding-top: 0; }
.page-contact .fact:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}
.page-contact .fact-key {
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  opacity: .76;
}
.page-contact .fact-val {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-xl);
  line-height: 1.1;
  color: var(--color-contrast-accent);
}

/* 通用区块头 */
.page-contact .section-head h2 {
  margin: var(--space-2) 0 var(--space-2);
  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 .section-lede {
  max-width: var(--measure);
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* 渠道面板 */
.page-contact .channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin-top: var(--space-4);
}
.page-contact .channel-panel {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-1);
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}
.page-contact .channel-panel::before {
  content: "";
  display: block;
  width: 44px;
  height: 3px;
  border-radius: var(--radius-pill);
  background: var(--color-line);
}
.page-contact .channel-panel--mail::before { background: var(--color-accent); }
.page-contact .channel-panel--phone::before { background: var(--color-primary); }
.page-contact .channel-panel--mail {
  border-color: color-mix(in srgb, var(--color-accent) 40%, var(--color-line));
}
.page-contact .channel-panel--phone {
  border-color: color-mix(in srgb, var(--color-primary) 34%, var(--color-line));
}
.page-contact .channel-panel:hover,
.page-contact .channel-panel:focus-within {
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
}
.page-contact .channel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}
.page-contact .channel-no {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  letter-spacing: .06em;
}
.page-contact .channel-name {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}
.page-contact .channel-value {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-base);
  line-height: 1.5;
  color: var(--color-ink);
  word-break: break-word;
}
.page-contact .channel-meta {
  display: grid;
  gap: 6px;
  margin: 0;
  padding-top: var(--space-2);
  border-top: 1px solid var(--color-line);
}
.page-contact .channel-meta-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  font-size: var(--text-sm);
}
.page-contact .channel-meta dt {
  color: var(--color-ink-muted);
  white-space: nowrap;
}
.page-contact .channel-meta dd {
  margin: 0;
  text-align: right;
  color: var(--color-ink-soft);
}
.page-contact .channel-meta dd.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.page-contact .channel-fit {
  border-top: 1px dashed var(--color-line);
}
.page-contact .channel-fit-inner {
  padding-top: var(--space-2);
}
.page-contact .channel-fit-title {
  margin: 0 0 var(--space-1);
  font-size: var(--text-xs);
  letter-spacing: .12em;
  color: var(--color-ink-muted);
}
.page-contact .channel-fit ul {
  display: grid;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--color-ink-soft);
}
.page-contact .channel-fit li {
  position: relative;
  padding-left: var(--space-2);
}
.page-contact .channel-fit li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 6px;
  height: 1px;
  background: var(--color-accent);
}
.page-contact .channel-panel--phone .channel-fit li::before { background: var(--color-primary); }
.page-contact .channel-panel--write .channel-fit li::before { background: var(--color-ink-muted); }

@media (hover: hover) and (min-width: 900px) {
  .page-contact .channel-fit {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 220ms ease, opacity 180ms ease;
  }
  .page-contact .channel-panel:hover .channel-fit,
  .page-contact .channel-panel:focus-within .channel-fit {
    max-height: 300px;
    opacity: 1;
  }
}

@media (min-width: 760px) {
  .page-contact .channel-grid { grid-template-columns: 1fr 1fr; }
  .page-contact .channel-panel--mail { grid-column: span 2; }
}
@media (min-width: 1040px) {
  .page-contact .channel-grid { grid-template-columns: 5fr 4fr 3fr; }
  .page-contact .channel-panel--mail,
  .page-contact .channel-panel--phone,
  .page-contact .channel-panel--write { grid-column: auto; }
  .page-contact .channel-panel--mail { padding: var(--space-6) var(--space-4); }
}

.page-contact .channel-texture {
  margin: var(--space-6) 0 0;
  overflow: hidden;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-surface-alt);
  box-shadow: var(--shadow-1);
}
.page-contact .channel-texture img {
  display: block;
  width: 100%;
  height: clamp(150px, 21vw, 260px);
  max-width: 100%;
  object-fit: cover;
}
.page-contact .channel-texture figcaption {
  padding: var(--space-2) var(--space-3);
  border-top: 1px solid var(--color-line);
  background: var(--color-surface);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

/* 用途与边界 */
.page-contact .detail-stack {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-4);
}
.page-contact .detail-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  padding: var(--space-4);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-1);
}
.page-contact .detail-key {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-1);
  padding-left: var(--space-2);
  border-left: 3px solid var(--color-line);
}
.page-contact .detail-row--mail .detail-key { border-left-color: var(--color-accent); }
.page-contact .detail-row--phone .detail-key { border-left-color: var(--color-primary); }
.page-contact .detail-no {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-sm);
  letter-spacing: .08em;
  color: var(--color-ink-muted);
}
.page-contact .detail-key h3 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}
.page-contact .detail-body .stat-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-line);
}
.page-contact .detail-body .stat-row:first-child { padding-top: 0; }
.page-contact .detail-body .stat-row:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}
.page-contact .detail-body .stat-key {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}
.page-contact .detail-body .stat-val {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}
.page-contact .detail-body .stat-val a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--color-primary) 40%, transparent);
}
.page-contact .detail-body .stat-val a:hover {
  border-bottom-color: var(--color-primary);
}

@media (min-width: 640px) {
  .page-contact .detail-body .stat-row {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: var(--space-3);
    align-items: baseline;
  }
}
@media (min-width: 900px) {
  .page-contact .detail-row {
    grid-template-columns: minmax(190px, .8fr) minmax(0, 2.2fr);
    gap: var(--space-6);
    align-items: start;
  }
}

/* 勘误处理路径 */
.page-contact .fix-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  align-items: start;
}
.page-contact .fix-copy h2 {
  margin: var(--space-2) 0 var(--space-2);
  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 .fix-lede {
  max-width: var(--measure);
  margin: 0 0 var(--space-4);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}
.page-contact .fix-steps {
  display: grid;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}
.page-contact .fix-step {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: var(--space-2);
  padding-bottom: var(--space-3);
  border-bottom: 1px dashed var(--color-line);
}
.page-contact .fix-step:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}
.page-contact .fix-step-no {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-lg);
  line-height: 1.1;
  color: var(--color-accent);
}
.page-contact .fix-step-body h3 {
  margin: 0 0 4px;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}
.page-contact .fix-step-body p {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}
.page-contact .fix-step-body a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--color-primary) 40%, transparent);
}
.page-contact .fix-step-body a:hover {
  border-bottom-color: var(--color-primary);
}
.page-contact .fix-figure {
  margin: 0;
}
.page-contact .fix-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
@media (min-width: 940px) {
  .page-contact .fix-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 1fr);
    gap: var(--space-8);
  }
}

/* 提交前清单 */
.page-contact .prep-inner {
  padding: var(--space-4);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-surface-alt);
}
.page-contact .prep-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  margin: var(--space-4) 0 0;
  padding: 0;
  list-style: none;
}
.page-contact .prep-item {
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  transition: border-color 160ms ease, background 160ms ease;
}
.page-contact .prep-item:hover {
  border-color: color-mix(in srgb, var(--color-primary) 40%, var(--color-line));
}
.page-contact .prep-label {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: var(--space-2);
  align-items: start;
  padding: var(--space-3);
  cursor: pointer;
}
.page-contact .prep-check {
  width: 18px;
  height: 18px;
  margin: 2px 0 0;
  accent-color: var(--color-primary);
}
.page-contact .prep-check:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}
.page-contact .prep-text {
  display: grid;
  gap: 4px;
}
.page-contact .prep-text strong {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  line-height: 1.4;
  color: var(--color-ink);
}
.page-contact .prep-text span {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}
.page-contact .prep-check:checked ~ .prep-text strong {
  color: var(--color-primary);
}
.page-contact .prep-foot {
  margin: var(--space-3) 0 0;
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-ink-muted);
}
@media (min-width: 780px) {
  .page-contact .prep-list { grid-template-columns: 1fr 1fr; }
  .page-contact .prep-inner { padding: var(--space-6); }
}

/* 备案与站点信息 */
.page-contact .meta-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  padding: var(--space-4);
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-lg);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  box-shadow: var(--shadow-1);
}
.page-contact .meta-col--lead h2 {
  margin: var(--space-2) 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-contrast-ink);
}
.page-contact .meta-col--lead .eyebrow {
  color: var(--color-contrast-accent);
}
.page-contact .meta-note {
  max-width: var(--measure);
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: .82;
}
.page-contact .meta-list {
  display: grid;
  gap: 0;
  margin: 0;
}
.page-contact .meta-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-contrast-line);
  font-size: var(--text-sm);
}
.page-contact .meta-row:first-child { padding-top: 0; }
.page-contact .meta-row:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}
.page-contact .meta-row dt {
  color: var(--color-contrast-ink);
  opacity: .7;
  white-space: nowrap;
}
.page-contact .meta-row dd {
  margin: 0;
  text-align: right;
  color: var(--color-contrast-ink);
}
.page-contact .meta-row dd.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}
.page-contact .meta-row a {
  color: var(--color-contrast-accent);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--color-contrast-accent) 45%, transparent);
}
.page-contact .meta-row a:hover {
  border-bottom-color: var(--color-contrast-accent);
}
@media (min-width: 900px) {
  .page-contact .meta-panel {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: var(--space-8);
    padding: var(--space-6);
  }
}

/* 动效降级 */
@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-panel,
  .page-contact .channel-fit,
  .page-contact .prep-item {
    transition: none;
  }
  .page-contact .channel-panel:hover,
  .page-contact .channel-panel:focus-within {
    transform: none;
  }
}

/* 焦点可见性 */
.page-contact a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: 2px;
}
<<<END>>>