.page-contact {
  --pc-paper-accent: #0B7A6B;
  --pc-paper-ink: #16324A;
  background: var(--c-deep);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ---------- 面包屑 ---------- */
.page-contact .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 22px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-mute);
}

.page-contact .breadcrumb a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.18s var(--ease);
}

.page-contact .breadcrumb a:hover {
  border-bottom-color: var(--c-cyan);
}

/* ---------- 首屏斜切 ---------- */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  padding: 32px 0 44px;
  border-bottom: var(--rule);
  background: linear-gradient(180deg, rgba(53, 240, 216, 0.06), rgba(6, 26, 46, 0) 62%);
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  right: -10%;
  bottom: -78px;
  width: 62%;
  height: 210px;
  background: linear-gradient(135deg, var(--c-steel), rgba(14, 44, 72, 0));
  transform: skewY(-7deg);
  pointer-events: none;
}

.page-contact .contact-hero .shell {
  position: relative;
  z-index: 1;
}

.page-contact .contact-hero h1 {
  margin: 14px 0 0;
  max-width: 880px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 6.4vw, 56px);
  line-height: 1.14;
  letter-spacing: -0.015em;
  color: var(--c-ink);
}

.page-contact .contact-hero .lede {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: clamp(16px, 2.4vw, 18px);
  line-height: 1.8;
  color: var(--ink-dim);
}

/* ---------- 首屏数字条 ---------- */
.page-contact .hero-metrics {
  margin-top: 36px;
  display: grid;
  gap: 1px;
  background: var(--c-grid);
  border: var(--rule);
}

.page-contact .hero-metric {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  background: var(--c-deep);
}

.page-contact .hero-metric-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--c-mist);
}

.page-contact .hero-metric-value {
  font-size: 17px;
  color: var(--c-cyan);
  font-variant-numeric: tabular-nums;
}

/* ---------- 主体两栏 ---------- */
.page-contact .contact-layout {
  display: grid;
  gap: 32px;
  padding: 40px 0 0;
}

.page-contact .contact-rail {
  display: flex;
  flex-direction: column;
  gap: 22px;
  min-width: 0;
}

.page-contact .contact-stream {
  display: flex;
  flex-direction: column;
  gap: 24px;
  min-width: 0;
}

/* ---------- 联系卡上方的氛围图 ---------- */
.page-contact .rail-media {
  margin: 0;
  border: var(--rule);
  background: var(--c-trench);
}

.page-contact .rail-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-contact .rail-media .media-caption,
.page-contact .mail-figure .media-caption {
  padding: 12px 14px;
  border-top: var(--rule);
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 13px;
  line-height: 1.65;
  color: var(--ink-mute);
}

/* ---------- 固定联系卡 ---------- */
.page-contact .contact-card {
  border: var(--rule);
  background: var(--c-trench);
}

.page-contact .contact-card-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 16px;
  padding: 15px 18px;
  border-bottom: var(--rule);
  background: linear-gradient(90deg, rgba(53, 240, 216, 0.09), rgba(53, 240, 216, 0) 72%);
}

.page-contact .contact-card-head .eyebrow {
  margin: 0;
}

.page-contact .contact-card-stamp {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--c-cyan);
}

.page-contact .channel {
  padding: 18px;
  border-bottom: var(--rule);
}

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

.page-contact .channel-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--c-cyan);
}

.page-contact .channel-value {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(15px, 3.6vw, 18px);
  line-height: 1.55;
  letter-spacing: 0.01em;
  color: var(--c-ink);
  word-break: break-word;
  font-variant-numeric: tabular-nums;
}

.page-contact .channel-value--text {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.72;
  letter-spacing: 0;
}

.page-contact .channel .note {
  margin: 9px 0 0;
  font-size: 13.5px;
  line-height: 1.68;
  color: var(--ink-mute);
  font-weight: 300;
}

/* ---------- 通用画板 ---------- */
.page-contact .stream-card {
  position: relative;
  border: var(--rule);
  background: var(--c-steel);
  padding: 24px 20px 26px;
  transition: opacity 0.34s var(--ease), transform 0.34s var(--ease);
}

.page-contact .stream-card::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 74px;
  height: 2px;
  background: var(--c-cyan);
}

.page-contact .card-head {
  margin-bottom: 18px;
}

.page-contact .card-head .eyebrow {
  margin: 0 0 8px;
}

.page-contact .card-head .section-title {
  margin: 0;
}

.page-contact .stream-card .section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(21px, 3.6vw, 30px);
  line-height: 1.3;
  letter-spacing: -0.005em;
  color: var(--c-ink);
}

.page-contact .stream-card .prose {
  margin: 0 0 20px;
  max-width: 68ch;
  font-size: 16.5px;
  line-height: 1.82;
  color: var(--ink-dim);
}

.page-contact .stream-card .note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  font-weight: 300;
  color: var(--c-mist);
}

/* ---------- 邮件标题示例 ---------- */
.page-contact .mail-template {
  margin: 0 0 4px;
  padding: 16px 18px;
  border: var(--rule);
  border-left: 2px solid var(--c-cyan);
  background: var(--c-trench);
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.95;
  color: var(--ink-dim);
  overflow-x: auto;
  word-break: break-word;
}

.page-contact .mail-template p {
  margin: 0;
}

.page-contact .mail-template p + p {
  margin-top: 4px;
}

/* ---------- 要点清单 ---------- */
.page-contact .rule-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-contact .rule-list li {
  display: grid;
  grid-template-columns: 16px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--ink-dim);
}

.page-contact .rule-list li::before {
  content: "";
  width: 7px;
  height: 7px;
  margin-top: 9px;
  background: var(--c-cyan);
}

/* ---------- 邮件规范配图 ---------- */
.page-contact .mail-figure {
  margin: 24px 0 0;
  border: var(--rule);
  background: var(--c-trench);
}

.page-contact .mail-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 分类折叠 ---------- */
.page-contact .cat-list {
  margin-top: 18px;
  border: var(--rule);
}

.page-contact .cat-item {
  background: var(--c-trench);
  border-bottom: var(--rule);
}

.page-contact .cat-item:last-child {
  border-bottom: 0;
}

.page-contact .cat-item > summary {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) 22px;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  transition: background 0.18s var(--ease);
}

.page-contact .cat-item > summary::-webkit-details-marker {
  display: none;
}

.page-contact .cat-item > summary::marker {
  content: "";
}

.page-contact .cat-item > summary:hover {
  background: rgba(53, 240, 216, 0.06);
}

.page-contact .cat-item > summary::after {
  content: "+";
  justify-self: end;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--c-cyan);
}

.page-contact .cat-item[open] > summary::after {
  content: "–";
}

.page-contact .cat-idx {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-mist);
}

.page-contact .cat-name {
  font-size: 16.5px;
  font-weight: 600;
  color: var(--c-ink);
}

.page-contact .cat-hint {
  display: none;
}

.page-contact .cat-body {
  padding: 2px 18px 20px;
  background: rgba(3, 16, 30, 0.55);
  border-top: 1px solid rgba(18, 59, 87, 0.9);
}

.page-contact .cat-body ul {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .cat-body li {
  display: grid;
  grid-template-columns: 14px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink-dim);
}

.page-contact .cat-body li::before {
  content: "";
  width: 6px;
  height: 6px;
  margin-top: 9px;
  border: 1px solid var(--c-cyan);
}

/* ---------- 地址与运营说明（纸白分区） ---------- */
.page-contact .geo-card {
  background: var(--c-paper);
  border-color: #C9D6DC;
}

.page-contact .geo-card::before {
  background: var(--pc-paper-accent);
}

.page-contact .geo-card .eyebrow {
  color: var(--pc-paper-accent);
}

.page-contact .geo-card .section-title {
  color: var(--ink-dark);
}

.page-contact .geo-card p {
  margin: 0;
  max-width: 66ch;
  font-size: 16px;
  line-height: 1.82;
  color: #24405A;
}

.page-contact .geo-list {
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(10, 34, 55, 0.16);
  border: 1px solid rgba(10, 34, 55, 0.16);
}

.page-contact .geo-list > div {
  padding: 16px 18px;
  background: var(--c-paper);
  display: grid;
  gap: 6px;
}

.page-contact .geo-list dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--pc-paper-accent);
}

.page-contact .geo-list dd {
  margin: 0;
  font-size: 16px;
  line-height: 1.7;
  color: var(--pc-paper-ink);
}

/* ---------- 自查清单 ---------- */
.page-contact .check-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--c-grid);
  border: var(--rule);
}

.page-contact .check-item {
  display: grid;
  grid-template-columns: 16px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 15px 18px;
  background: var(--c-steel);
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--ink-dim);
}

.page-contact .check-box {
  position: relative;
  width: 15px;
  height: 15px;
  margin-top: 6px;
  border: 1px solid var(--c-cyan);
}

.page-contact .check-box::after {
  content: "";
  position: absolute;
  inset: 3px;
  background: rgba(53, 240, 216, 0.2);
}

.page-contact #checklist .note {
  margin-top: 16px;
}

/* ---------- 页面收束 ---------- */
.page-contact .contact-outro {
  margin-top: 44px;
  padding: 34px 0 56px;
  border-top: var(--rule);
  background: var(--c-trench);
}

.page-contact .outro-inner {
  display: grid;
  gap: 22px;
}

.page-contact .outro-text {
  margin: 8px 0 0;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-dim);
}

.page-contact .outro-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-contact .btn {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 640px) {
  .page-contact .hero-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .cat-item > summary {
    grid-template-columns: 34px minmax(0, 1fr) auto 24px;
  }

  .page-contact .cat-hint {
    display: block;
    font-family: var(--font-mono);
    font-size: 12.5px;
    letter-spacing: 0.04em;
    color: var(--c-mist);
    white-space: nowrap;
  }

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

  .page-contact .geo-list > div:last-child {
    grid-column: 1 / -1;
  }

  .page-contact .stream-card {
    padding: 32px 34px 34px;
  }
}

@media (min-width: 960px) {
  .page-contact .contact-layout {
    grid-template-columns: minmax(0, 340px) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
    padding-top: 56px;
  }

  .page-contact .contact-hero {
    padding: 44px 0 58px;
  }

  .page-contact .outro-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
  }

  .page-contact .outro-links {
    justify-content: flex-end;
  }
}

@media (min-width: 1220px) {
  .page-contact .contact-layout {
    grid-template-columns: minmax(0, 372px) minmax(0, 1fr);
    gap: 64px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .stream-card,
  .page-contact .breadcrumb a,
  .page-contact .cat-item > summary {
    transition: none;
  }
}
<<<END>>>