.page-contact {
  --pc-line: rgba(30, 42, 56, 0.16);
  --pc-line-strong: rgba(30, 42, 56, 0.32);
  --pc-rail-w: 304px;
  background-color: var(--c-warm);
  color: var(--c-ink);
  font-family: var(--font-sans);
  padding-bottom: 76px;
}

.page-contact .mono,
.page-contact .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.page-contact .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--c-cinnabar);
}

/* 首屏 */
.page-contact .pc-hero {
  padding-top: 24px;
}

.page-contact .pc-hero__title {
  margin: 14px 0 16px;
  max-width: 22em;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.7rem, 6.4vw, 2.75rem);
  line-height: 1.26;
  letter-spacing: -0.01em;
}

.page-contact .pc-hero__lede {
  max-width: 34em;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text-sub);
}

.page-contact .pc-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 20px;
  margin: 26px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--pc-line);
  list-style: none;
}

.page-contact .pc-facts li {
  display: grid;
  gap: 4px;
  padding-left: 12px;
  border-left: 2px solid var(--c-terracotta);
}

.page-contact .pc-facts__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.5rem;
  line-height: 1.1;
  color: var(--c-ink);
}

.page-contact .pc-facts__label {
  font-size: 0.8125rem;
  line-height: 1.55;
  color: var(--text-sub);
}

.page-contact .pc-toc {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 20px;
  margin-top: 26px;
  padding-top: 14px;
  border-top: 1px solid var(--pc-line-strong);
}

.page-contact .pc-toc__label {
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  color: var(--c-stone);
}

.page-contact .pc-toc__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .pc-toc__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  font-size: 0.8125rem;
  color: var(--text-sub);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-contact .pc-toc__list .mono {
  font-size: 0.6875rem;
  color: var(--c-stone);
}

.page-contact .pc-toc__list a:hover,
.page-contact .pc-toc__list a.is-active {
  color: var(--c-cinnabar);
  border-bottom-color: var(--c-cinnabar);
}

/* 双栏骨架 */
.page-contact .pc-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
  padding-top: 34px;
}

/* 左侧联系窄栏 */
.page-contact .pc-rail {
  position: relative;
  padding: 22px 20px 24px;
  background-color: var(--c-sand);
  border: 1px solid var(--pc-line-strong);
  border-top: 3px solid var(--c-ink);
}

.page-contact .pc-rail::after {
  content: "";
  position: absolute;
  top: 3px;
  right: -1px;
  width: 22px;
  height: 22px;
  background-color: var(--c-warm);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
  pointer-events: none;
}

.page-contact .pc-rail__title {
  margin: 8px 0 14px;
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.4;
}

.page-contact .pc-channels {
  margin: 0;
}

.page-contact .pc-channel {
  display: grid;
  gap: 3px;
  padding: 12px 0;
  border-top: 1px solid var(--pc-line-strong);
}

.page-contact .pc-channel dt {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: var(--c-stone);
}

.page-contact .pc-channel dd {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.65;
  overflow-wrap: anywhere;
}

.page-contact .pc-channel dd .mono {
  font-size: 0.875rem;
  color: var(--c-ink);
}

.page-contact .pc-rail__hint {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--pc-line-strong);
  font-size: 0.8125rem;
  line-height: 1.75;
  color: var(--text-sub);
}

.page-contact .pc-fold {
  margin-top: 16px;
  background-color: rgba(247, 243, 236, 0.62);
  border: 1px solid var(--pc-line-strong);
}

.page-contact .fold__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  width: 100%;
  padding: 12px 14px;
  border: 0;
  background: none;
  font: inherit;
  font-size: 0.875rem;
  color: var(--c-ink);
  text-align: left;
  cursor: pointer;
}

.page-contact .pc-fold__mark {
  color: var(--c-cinnabar);
  font-size: 0.875rem;
  line-height: 1;
}

.page-contact .fold__body {
  padding: 0 14px 14px;
}

.page-contact .fold__body[hidden] {
  display: none;
}

.page-contact .pc-fold__list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding-left: 18px;
  font-size: 0.8125rem;
  line-height: 1.75;
  color: var(--text-sub);
}

.page-contact .pc-fav {
  width: 100%;
  margin-top: 16px;
  justify-content: center;
}

/* 主栏小节 */
.page-contact .pc-sec {
  padding-top: 26px;
  border-top: 2px solid var(--c-ink);
}

.page-contact .pc-sec + .pc-sec {
  margin-top: 38px;
}

.page-contact .pc-sec__head {
  padding-bottom: 16px;
  margin-bottom: 22px;
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .pc-sec__index {
  display: block;
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--c-cinnabar);
}

.page-contact .pc-sec__title {
  margin: 6px 0 10px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.3rem, 4.4vw, 1.75rem);
  line-height: 1.35;
}

.page-contact .pc-sec__lead {
  margin: 0;
  max-width: 34em;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--text-sub);
}

.page-contact .pc-sec .prose p {
  margin: 0 0 14px;
  max-width: 36em;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--text-sub);
}

.page-contact .pc-sec .prose p:last-child {
  margin-bottom: 0;
}

/* 三类合作 */
.page-contact .pc-types {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .pc-type {
  padding: 20px 0;
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .pc-type__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 12px;
  margin-bottom: 12px;
}

.page-contact .pc-type__num {
  padding: 1px 8px;
  border: 1px solid var(--c-cinnabar);
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--c-cinnabar);
}

.page-contact .pc-type__title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.4;
}

.page-contact .pc-type__info {
  display: grid;
  gap: 10px;
  margin: 0;
}

.page-contact .pc-type__info > div {
  display: grid;
  gap: 3px;
}

.page-contact .pc-type__info dt {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--c-stone);
}

.page-contact .pc-type__info dd {
  margin: 0;
  max-width: 38em;
  font-size: 0.9375rem;
  line-height: 1.78;
}

.page-contact .pc-type__info a {
  color: var(--c-turquoise);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 111, 98, 0.42);
}

.page-contact .pc-type__info a:hover {
  border-bottom-color: var(--c-turquoise);
}

/* 邮件要点清单 */
.page-contact .pc-mail {
  margin: 14px 0 0;
  padding: 0;
  border-top: 1px solid var(--pc-line);
  list-style: none;
}

.page-contact .pc-mail li {
  display: grid;
  gap: 3px;
  padding: 12px 0;
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .pc-mail strong {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 400;
  color: var(--c-ink);
}

.page-contact .pc-mail span {
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--text-sub);
}

/* 配图 */
.page-contact .pc-doc-figure {
  margin: 26px 0 0;
}

.page-contact .pc-doc-figure .figure__frame {
  border: 1px solid var(--pc-line-strong);
  background-color: var(--c-mist);
}

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

.page-contact .figure__caption {
  margin-top: 9px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--c-stone);
}

/* 四步流程 */
.page-contact .pc-steps__svg {
  display: block;
  width: 100%;
  height: auto;
  max-height: 150px;
  margin: 0 0 24px;
}

.page-contact .pc-steps__line {
  fill: none;
  stroke: var(--c-terracotta);
  stroke-width: 2;
  stroke-linejoin: round;
}

.page-contact .pc-steps__node circle {
  fill: var(--c-warm);
  stroke: var(--c-terracotta);
  stroke-width: 1.5;
}

.page-contact .pc-steps__node text {
  font-family: var(--font-mono);
  font-size: 13px;
  fill: var(--c-cinnabar);
}

.page-contact .pc-steps__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .pc-steps__list li {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-top: 1px solid var(--pc-line);
}

.page-contact .pc-steps__list h3 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.45;
}

.page-contact .pc-steps__list p {
  margin: 0;
  max-width: 38em;
  font-size: 0.9375rem;
  line-height: 1.82;
  color: var(--text-sub);
}

/* 到访说明 */
.page-contact .pc-visit {
  display: grid;
  gap: 26px;
}

.page-contact .pc-visit__figure {
  margin: 0;
}

.page-contact .pc-visit__figure .figure__frame {
  border: 1px solid var(--pc-line-strong);
  background-color: var(--c-mist);
}

.page-contact .pc-visit__figure .figure__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-contact .pc-visit__list {
  display: grid;
  gap: 9px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .pc-visit__list li {
  position: relative;
  padding-left: 18px;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--text-sub);
}

.page-contact .pc-visit__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  background-color: var(--c-turquoise);
}

/* 延伸入口 */
.page-contact .pc-next {
  margin-top: 40px;
  padding-top: 22px;
  border-top: 1px solid var(--pc-line-strong);
}

.page-contact .pc-next__title {
  margin: 8px 0 0;
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.45;
}

.page-contact .pc-next__list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .pc-next__list li {
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .pc-next__list a {
  display: grid;
  grid-template-columns: 2.6em minmax(0, 1fr);
  gap: 12px;
  padding: 13px 6px;
  font-size: 0.9375rem;
  line-height: 1.72;
  color: var(--c-ink);
  text-decoration: none;
  transition: background-color 0.2s ease;
}

.page-contact .pc-next__list a:hover {
  background-color: rgba(237, 227, 211, 0.72);
}

.page-contact .pc-next__list .mono {
  font-size: 0.75rem;
  color: var(--c-cinnabar);
}

/* 平板与桌面 */
@media (min-width: 700px) {
  .page-contact .pc-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px 22px;
  }

  .page-contact .pc-type__info > div {
    grid-template-columns: 6.4em minmax(0, 1fr);
    gap: 4px 16px;
  }

  .page-contact .pc-type__info dt {
    padding-top: 4px;
  }

  .page-contact .pc-mail li {
    grid-template-columns: 8.5em minmax(0, 1fr);
    gap: 4px 18px;
    align-items: baseline;
  }
}

@media (min-width: 1000px) {
  .page-contact .pc-layout {
    grid-template-columns: var(--pc-rail-w) minmax(0, 1fr);
    gap: 52px;
    padding-top: 44px;
  }

  .page-contact .pc-rail {
    position: sticky;
    top: calc(var(--hint-h) + 18px);
  }

  .page-contact .pc-visit {
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 44px;
    align-items: start;
  }

  .page-contact .pc-steps__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 40px;
  }

  .page-contact .pc-steps__list li:nth-child(1),
  .page-contact .pc-steps__list li:nth-child(2) {
    border-top: 1px solid var(--pc-line);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .pc-toc__list a,
  .page-contact .pc-next__list a {
    transition: none;
  }
}
<<<END>>>