.page-contact {
  --fold-size: 16px;
  --contact-gap: clamp(20px, 4vw, 44px);
  background: var(--paper-000);
  color: var(--ink-700);
  overflow-x: hidden;
}

.page-contact a {
  color: var(--jade-600);
  text-decoration: none;
  border-bottom: 1px solid rgba(15, 122, 108, .32);
  transition: border-color .18s var(--ease), color .18s var(--ease);
}

.page-contact a:hover {
  border-color: var(--jade-600);
  color: var(--ink-900);
}

.page-contact .contact-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--fs-32);
  font-weight: 700;
  line-height: 1.1;
  color: var(--gold-500);
  display: block;
}

/* 面包屑 */
.page-contact .contact-crumb {
  padding-top: clamp(16px, 3vw, 28px);
}

.page-contact .breadcrumb__item + .breadcrumb__sep,
.page-contact .breadcrumb__item[aria-current="page"] {
  color: var(--gray-500);
}

/* 首屏 */
.page-contact .contact-hero {
  padding-top: clamp(24px, 4vw, 48px);
  padding-bottom: clamp(32px, 6vw, 72px);
}

.page-contact .contact-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--contact-gap);
}

.page-contact .contact-hero__intro h1 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -.01em;
  color: var(--ink-900);
  font-size: clamp(30px, 7vw, var(--fs-48));
  line-height: 1.18;
  margin: 12px 0 18px;
}

.page-contact .contact-hero__intro .lede {
  font-size: var(--fs-18);
  line-height: 1.85;
  color: var(--ink-700);
  max-width: 34em;
}

.page-contact .contact-hero__facts {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
  border-top: 1px solid var(--line-200);
  padding-top: 20px;
}

.page-contact .contact-hero__facts li {
  display: grid;
  gap: 2px;
}

.page-contact .contact-hero__facts .muted {
  font-size: var(--fs-14);
  line-height: 1.6;
}

/* 折角便签卡，错落排列 */
.page-contact .contact-hero__notes {
  display: grid;
  gap: 18px;
}

.page-contact .note-card {
  --fold: var(--fold-size);
  position: relative;
  background: #fff;
  border: 1px solid var(--line-200);
  padding: 20px 22px 22px;
  box-shadow: var(--shadow-s);
  clip-path: polygon(0 0, calc(100% - var(--fold)) 0, 100% var(--fold), 100% 100%, 0 100%);
  transition: transform .2s var(--ease), box-shadow .2s var(--ease);
  cursor: pointer;
}

.page-contact .note-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: var(--fold);
  height: var(--fold);
  background: linear-gradient(135deg, var(--gold-100), rgba(199, 154, 59, .32));
  clip-path: polygon(0 0, 100% 0, 100% 100%);
}

.page-contact .note-card:hover,
.page-contact .note-card:focus-visible {
  transform: translateY(-4px);
  box-shadow: var(--shadow-m);
  outline: none;
}

.page-contact .note-card__kicker {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--gray-500);
  margin: 0 0 6px;
  text-transform: uppercase;
}

.page-contact .note-card__title {
  font-family: var(--font-display);
  font-size: var(--fs-18);
  font-weight: 800;
  color: var(--ink-900);
  margin: 0 0 8px;
}

.page-contact .note-card__value {
  font-size: var(--fs-16);
  color: var(--jade-600);
  font-weight: 700;
  margin: 0;
  word-break: break-all;
}

.page-contact .note-card--b .note-card__value,
.page-contact .note-card--a .note-card__value {
  font-size: var(--fs-18);
}

.page-contact .tag-note {
  margin: 10px 0 0;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--gray-500);
  border-left: 2px solid var(--jade-400);
  padding-left: 10px;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height .24s var(--ease), opacity .24s var(--ease), margin .24s var(--ease);
}

.page-contact .note-card.is-open .tag-note,
.page-contact .tag-toggle.is-open + .tag-note {
  max-height: 200px;
  opacity: 1;
}

.page-contact .contact-hero__photo {
  margin: 6px 0 0;
  background: var(--mist-050);
}

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

.page-contact .contact-hero__photo .media__caption {
  font-size: var(--fs-12);
  color: var(--gray-500);
  padding-top: 8px;
  line-height: 1.6;
}

/* 主体：左侧跟随索引 + 右侧章节流 */
.page-contact .contact-body {
  padding-bottom: clamp(40px, 7vw, 86px);
}

.page-contact .contact-body__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--contact-gap);
}

.page-contact .contact-rail {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  align-items: baseline;
  border-bottom: 1px solid var(--line-200);
  padding-bottom: 14px;
}

.page-contact .contact-rail .eyebrow {
  width: 100%;
  margin-bottom: 2px;
}

.page-contact .toc__link {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  color: var(--gray-500);
  border-bottom: 1px solid transparent;
  padding: 2px 0;
}

.page-contact .toc__link.is-active,
.page-contact .toc__link:hover {
  color: var(--ink-900);
  border-bottom-color: var(--gold-500);
}

.page-contact .contact-chapters {
  display: grid;
  gap: clamp(34px, 6vw, 64px);
}

.page-contact .contact-chapter {
  scroll-margin-top: calc(var(--header-h) + 24px);
  border-top: 1px solid var(--line-200);
  padding-top: 22px;
}

.page-contact .contact-chapter__num {
  font-size: var(--fs-14);
  letter-spacing: .12em;
  color: var(--gold-500);
  margin: 0 0 8px;
}

.page-contact .contact-chapter h2 {
  font-family: var(--font-display);
  font-size: clamp(22px, 4.4vw, var(--fs-32));
  font-weight: 900;
  color: var(--ink-900);
  line-height: 1.3;
  margin: 0 0 14px;
}

.page-contact .contact-chapter h3 {
  font-family: var(--font-display);
  font-size: var(--fs-18);
  font-weight: 800;
  color: var(--ink-900);
  margin: 0 0 6px;
}

.page-contact .contact-chapter .prose {
  font-size: var(--fs-16);
  line-height: 1.85;
  margin: 0 0 16px;
  max-width: 40em;
}

.page-contact .contact-chapter__foot {
  font-size: var(--fs-14);
  line-height: 1.8;
}

/* 三种人工场景 */
.page-contact .human-list {
  list-style: none;
  margin: 22px 0 18px;
  padding: 0;
  display: grid;
  gap: 14px;
  counter-reset: none;
}

.page-contact .human-item {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 14px;
  background: #fff;
  border: 1px solid var(--line-200);
  border-left: 3px solid var(--jade-600);
  padding: 16px 18px;
  box-shadow: var(--shadow-s);
  transition: transform .2s var(--ease), border-color .2s var(--ease);
}

.page-contact .human-item:hover {
  transform: translateY(-2px);
  border-left-color: var(--gold-500);
}

.page-contact .human-item__num {
  font-size: var(--fs-24);
  font-weight: 700;
  color: var(--gold-500);
  line-height: 1.1;
}

.page-contact .human-item p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--gray-500);
}

/* 服务范围两栏 */
.page-contact .scope-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 22px 0 20px;
}

.page-contact .scope-col {
  background: #fff;
  border: 1px solid var(--line-200);
  padding: 18px 18px 8px;
  box-shadow: var(--shadow-s);
  transition: box-shadow .2s var(--ease), transform .2s var(--ease);
}

.page-contact .scope-col--compare {
  background: var(--mist-050);
}

.page-contact .scope-col.is-open {
  box-shadow: var(--shadow-m);
  transform: translateY(-2px);
}

.page-contact .tag-toggle {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  background: none;
  border: none;
  border-bottom: 1px solid var(--line-200);
  padding: 0 0 10px;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: var(--fs-18);
  font-weight: 800;
  color: var(--ink-900);
  text-align: left;
}

.page-contact .tag-toggle__icon {
  font-family: var(--font-mono);
  color: var(--jade-600);
  font-size: var(--fs-18);
  transition: transform .2s var(--ease);
}

.page-contact .tag-toggle.is-open .tag-toggle__icon {
  transform: rotate(45deg);
}

.page-contact .scope-col .tag-note {
  max-height: 0;
  opacity: 0;
  margin-top: 0;
}

.page-contact .scope-col .tag-note.is-open {
  max-height: 160px;
  opacity: 1;
  margin-top: 12px;
}

.page-contact .scope-list {
  list-style: none;
  margin: 14px 0 18px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .scope-list li {
  position: relative;
  padding-left: 20px;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--ink-700);
}

.page-contact .scope-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 8px;
  height: 8px;
  border: 1px solid var(--jade-400);
  transform: rotate(45deg);
}

.page-contact .callout {
  border: 1px solid var(--line-200);
  padding: 16px 18px;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--ink-700);
  background: var(--gold-100);
  border-left: 3px solid var(--gold-500);
  margin-top: 8px;
}

.page-contact .callout--jade {
  background: var(--mist-050);
  border-left-color: var(--jade-600);
}

.page-contact .callout p {
  margin: 0;
}

/* 提交前准备 */
.page-contact .prep-list {
  margin: 22px 0 20px;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line-200);
}

.page-contact .prep-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  border-bottom: 1px solid var(--line-200);
  padding: 16px 0;
}

.page-contact .prep-item dt {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: var(--fs-18);
  font-weight: 800;
  color: var(--ink-900);
}

.page-contact .prep-item dd {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--gray-500);
  max-width: 40em;
}

/* 归属与备案 */
.page-contact .contact-chapter--records {
  background: linear-gradient(180deg, rgba(234, 245, 242, .55), rgba(251, 249, 245, 0));
  padding-bottom: 8px;
}

.page-contact .records-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  margin-top: 18px;
}

.page-contact .records-icp {
  color: var(--gold-500);
  font-size: var(--fs-16);
}

.page-contact .records-meta {
  display: grid;
  gap: 12px;
  margin: 20px 0 14px;
  padding-top: 18px;
  border-top: 1px solid var(--line-200);
}

.page-contact .records-meta dt {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--gray-500);
  margin-bottom: 3px;
}

.page-contact .records-meta dd {
  margin: 0;
  font-size: var(--fs-16);
  color: var(--ink-900);
  word-break: break-all;
}

.page-contact .records-note {
  font-size: var(--fs-14);
  line-height: 1.8;
  border-top: 1px solid var(--line-200);
  padding-top: 14px;
}

.page-contact .records-visual {
  display: grid;
  gap: 14px;
}

.page-contact .contact-map {
  width: 100%;
  height: auto;
  max-width: 340px;
  color: var(--jade-400);
  opacity: .85;
}

.page-contact .records-visual .media {
  margin: 0;
  background: var(--mist-050);
}

.page-contact .records-visual img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

.page-contact .records-visual .media__caption {
  font-size: var(--fs-12);
  color: var(--gray-500);
  line-height: 1.6;
  padding-top: 8px;
}

/* 延伸入口 */
.page-contact .contact-next {
  background: var(--ink-900);
  color: var(--paper-000);
  padding-top: clamp(34px, 6vw, 62px);
  padding-bottom: clamp(34px, 6vw, 62px);
}

.page-contact .contact-next__head {
  margin-bottom: 22px;
}

.page-contact .contact-next__head .eyebrow {
  color: var(--jade-400);
}

.page-contact .contact-next__head h2 {
  font-family: var(--font-display);
  font-size: clamp(22px, 4.4vw, var(--fs-32));
  font-weight: 900;
  color: var(--paper-000);
  margin: 8px 0 0;
  line-height: 1.3;
}

.page-contact .contact-next__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-contact .next-entry a {
  display: grid;
  gap: 4px;
  padding: 16px 4px;
  border-bottom: 1px solid rgba(215, 221, 226, .22);
  color: var(--paper-000);
  transition: background-color .2s var(--ease), padding-left .2s var(--ease);
}

.page-contact .next-entry a:hover {
  background: rgba(15, 122, 108, .22);
  padding-left: 12px;
  border-bottom-color: var(--jade-400);
}

.page-contact .next-entry__title {
  font-family: var(--font-display);
  font-size: var(--fs-18);
  font-weight: 800;
}

.page-contact .next-entry__desc {
  font-size: var(--fs-14);
  line-height: 1.75;
  color: rgba(251, 249, 245, .72);
}

/* 进入视口 */
.page-contact [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .4s var(--ease), transform .4s var(--ease);
}

.page-contact [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (min-width: 720px) {
  .page-contact .contact-hero__notes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }

  .page-contact .note-card--a {
    grid-column: 1 / 2;
  }

  .page-contact .note-card--b {
    grid-column: 2 / 3;
    margin-top: 26px;
  }

  .page-contact .note-card--c {
    grid-column: 1 / 2;
    margin-top: -6px;
  }

  .page-contact .contact-hero__photo {
    grid-column: 2 / 3;
    margin-top: 2px;
  }

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

  .page-contact .prep-item {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
  }

  .page-contact .contact-next__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 28px;
  }
}

@media (min-width: 980px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr);
    align-items: start;
    gap: clamp(32px, 5vw, 68px);
  }

  .page-contact .contact-hero__intro {
    position: sticky;
    top: calc(var(--header-h) + 32px);
  }

  .page-contact .contact-body__grid {
    grid-template-columns: minmax(0, 220px) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }

  .page-contact .contact-rail {
    position: sticky;
    top: calc(var(--header-h) + 32px);
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 10px;
    border-bottom: none;
    border-left: 1px solid var(--line-200);
    padding: 4px 0 4px 16px;
  }

  .page-contact .contact-rail .eyebrow {
    width: auto;
    margin-bottom: 6px;
  }

  .page-contact .contact-rail .toc__link {
    font-size: var(--fs-14);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact *,
  .page-contact *::before,
  .page-contact *::after {
    transition-duration: .001ms !important;
    animation-duration: .001ms !important;
  }

  .page-contact [data-reveal] {
    opacity: 1;
    transform: none;
  }
}
</main>