.page-contact {
  --contact-gap: clamp(1.25rem, 3.2vw, 2rem);
  --contact-field-bg: var(--paper-100);
  background-color: var(--paper-000);
  color: var(--ink-900);
  font-family: var(--font-ui);
  overflow-x: hidden;
}

.page-contact__crumbs {
  padding-top: clamp(1.5rem, 5vw, 3rem);
}

/* ---------- 首屏：信纸 ---------- */

.page-contact .contact-hero {
  padding-block: clamp(1.5rem, 4vw, 2.5rem) clamp(2.5rem, 6vw, 4.5rem);
}

.page-contact .contact-hero__shell {
  display: grid;
  gap: var(--contact-gap);
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .contact-hero__letter {
  position: relative;
  padding: clamp(1.5rem, 5vw, 3rem) clamp(1.25rem, 4.5vw, 3.25rem) clamp(1.5rem, 4vw, 2.75rem);
  background-color: var(--paper-000);
  border: var(--hair) solid var(--rule-2);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-paper);
}

.page-contact .contact-hero__seal {
  position: absolute;
  top: clamp(1rem, 3vw, 1.75rem);
  right: clamp(1rem, 3vw, 1.75rem);
  width: 56px;
  height: 56px;
  color: var(--anchor-600);
}

.page-contact .seal-frame,
.page-contact .seal-env {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
}

.page-contact .seal-dot--spring { fill: var(--spring-400); }
.page-contact .seal-dot--summer { fill: var(--summer-500); }
.page-contact .seal-dot--autumn { fill: var(--autumn-300); }
.page-contact .seal-dot--winter { fill: var(--winter-700); }

.page-contact .contact-hero__title {
  margin: 0.6rem 0 0;
  max-width: 15em;
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 7.5vw, 4.5rem);
  font-weight: 600;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--ink-900);
}

.page-contact .contact-hero__lede {
  margin: 1rem 0 0;
  max-width: 34em;
  font-size: clamp(1rem, 2.2vw, 1.125rem);
  line-height: 1.85;
  color: var(--ink-600);
}

.page-contact .contact-hero__fields {
  display: grid;
  gap: 0.6rem;
  margin: clamp(1.5rem, 4vw, 2.25rem) 0 0;
  padding-top: clamp(1rem, 3vw, 1.5rem);
  border-top: var(--hair) solid var(--rule);
}

.page-contact .contact-hero__field {
  display: grid;
  grid-template-columns: 4.25rem minmax(0, 1fr);
  gap: 0.75rem;
  align-items: baseline;
}

.page-contact .contact-hero__field dt {
  font-family: var(--font-figure);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--ink-300);
}

.page-contact .contact-hero__field dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-900);
  overflow-wrap: anywhere;
}

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

.page-contact .contact-hero__aside .media__caption {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-600);
}

/* ---------- 三条路径 ---------- */

.page-contact .contact-paths {
  padding-block: clamp(2rem, 6vw, 4rem);
  background-color: var(--paper-100);
  border-block: var(--hair) solid var(--rule);
}

.page-contact .contact-paths__head {
  max-width: 40rem;
  margin-bottom: clamp(1.75rem, 4vw, 3rem);
}

.page-contact .contact-paths__title,
.page-contact .contact-compose__title,
.page-contact .contact-corrections__title,
.page-contact .contact-partners__title {
  margin: 0.5rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4.4vw, 2.75rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-contact .contact-paths__lede,
.page-contact .contact-compose__lede {
  margin: 0.85rem 0 0;
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--ink-600);
}

.page-contact .contact-paths__grid {
  display: grid;
  gap: var(--contact-gap);
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .path-card {
  position: relative;
  padding: clamp(1.25rem, 3.5vw, 2rem) clamp(1.15rem, 3vw, 1.85rem);
  background-color: var(--paper-000);
  border: var(--hair) solid var(--rule-2);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-contact .path-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
}

.page-contact .path-card--mail::before { background-color: var(--spring-400); }
.page-contact .path-card--phone::before { background-color: var(--summer-500); }
.page-contact .path-card--post::before { background-color: var(--autumn-300); }

.page-contact .path-card__tag {
  margin: 0;
  font-family: var(--font-figure);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ink-300);
}

.page-contact .path-card__title {
  margin: 0.5rem 0 0.85rem;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.3;
}

.page-contact .path-card__value {
  margin: 0;
  font-size: 1.0rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink-900);
  overflow-wrap: anywhere;
}

.page-contact .path-card__link {
  color: var(--anchor-600);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.page-contact .path-card__link:hover,
.page-contact .path-card__link:focus-visible {
  color: var(--anchor-500);
}

.page-contact .path-card__figure {
  font-family: var(--font-figure);
  font-size: 1.125rem;
  letter-spacing: 0.04em;
}

.page-contact .path-card__desc {
  margin: 0.9rem 0 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--ink-600);
}

.page-contact .path-card__note {
  margin: 1.1rem 0 0;
  padding-top: 0.85rem;
  border-top: var(--hair) solid var(--rule);
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--ink-300);
}

/* ---------- 写信要点 ---------- */

.page-contact .contact-compose {
  padding-block: clamp(2.5rem, 7vw, 5rem);
}

.page-contact .contact-compose__shell {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .compose-list {
  list-style: none;
  counter-reset: compose;
  margin: clamp(1.5rem, 4vw, 2.25rem) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-contact .compose-list__item {
  counter-increment: compose;
  position: relative;
  padding: 1.25rem 0 1.25rem 3rem;
  border-bottom: var(--hair) solid var(--rule);
}

.page-contact .compose-list__item:first-child {
  border-top: var(--hair) solid var(--rule);
}

.page-contact .compose-list__item::before {
  content: counter(compose, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1.35rem;
  font-family: var(--font-figure);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--anchor-600);
}

.page-contact .compose-list__title {
  margin: 0;
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.6;
}

.page-contact .compose-list__text {
  margin: 0.4rem 0 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--ink-600);
}

.page-contact .contact-compose__figure {
  margin: clamp(1.75rem, 4vw, 2.5rem) 0 0;
}

.page-contact .contact-compose__figure .media__caption {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-600);
}

.page-contact .contact-compose__aside {
  padding: clamp(1.25rem, 3.5vw, 2rem);
  background-color: var(--mist-050);
  border: var(--hair) solid var(--rule-2);
  border-top: 4px solid var(--winter-700);
  border-radius: var(--r-md);
}

.page-contact .compose-aside__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.4;
}

.page-contact .compose-aside__text {
  margin: 0.85rem 0 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--ink-600);
}

.page-contact .compose-aside__links {
  margin: 1.35rem 0 0;
}

/* ---------- 纠错与建议 ---------- */

.page-contact .contact-corrections {
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
  background-color: var(--paper-100);
  border-block: var(--hair) solid var(--rule);
}

.page-contact .contact-corrections__shell {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3.5rem);
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .contact-corrections__block {
  padding-left: clamp(1rem, 3vw, 1.75rem);
  border-left: 2px solid var(--spring-200);
}

.page-contact .contact-corrections__block:last-child {
  border-left-color: var(--autumn-300);
}

.page-contact .contact-corrections__title {
  font-size: clamp(1.5rem, 3.6vw, 2.125rem);
}

.page-contact .contact-corrections__text {
  margin: 0.9rem 0 0;
  max-width: 36em;
  font-size: 0.9375rem;
  line-height: 1.9;
  color: var(--ink-600);
}

/* ---------- 合作与授权 ---------- */

.page-contact .contact-partners {
  padding-block: clamp(2.5rem, 7vw, 5rem);
}

.page-contact .contact-partners__panel {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  grid-template-columns: minmax(0, 1fr);
  padding: clamp(1.5rem, 4.5vw, 3rem);
  background-color: var(--paper-000);
  border: var(--hair) solid var(--rule-2);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-float);
}

.page-contact .contact-partners__text {
  margin: 0.85rem 0 0;
  font-size: 0.9375rem;
  line-height: 1.9;
  color: var(--ink-600);
}

.page-contact .contact-partners__subtitle {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.1875rem;
  font-weight: 600;
  line-height: 1.4;
}

.page-contact .contact-partners__link,
.page-contact .contact-record__link {
  color: var(--anchor-600);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.page-contact .contact-partners__link:hover,
.page-contact .contact-partners__link:focus-visible,
.page-contact .contact-record__link:hover,
.page-contact .contact-record__link:focus-visible {
  color: var(--anchor-500);
}

.page-contact .contact-partners__links {
  margin: 1.35rem 0 0;
}

/* ---------- 备案与归属 ---------- */

.page-contact .contact-record {
  padding-block: clamp(2rem, 5vw, 3.5rem);
  background-color: var(--winter-700);
  color: var(--paper-000);
}

.page-contact .contact-record__shell {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .contact-record__fields {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .record-field {
  padding: 0.85rem 1rem;
  background-color: rgba(247, 243, 234, 0.08);
  border: var(--hair) solid rgba(247, 243, 234, 0.22);
  border-radius: var(--r-sm);
}

.page-contact .record-field__label {
  margin: 0;
  font-family: var(--font-figure);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: rgba(247, 243, 234, 0.6);
}

.page-contact .record-field__value {
  margin: 0.4rem 0 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--paper-000);
  overflow-wrap: anywhere;
}

.page-contact .record-field__value:only-child {
  margin-top: 0;
}

.page-contact .contact-record__text {
  margin: 0;
  max-width: 40em;
  font-size: 0.9375rem;
  line-height: 1.9;
  color: rgba(247, 243, 234, 0.82);
}

.page-contact .contact-record__link {
  color: var(--paper-000);
  text-decoration-color: var(--anchor-500);
}

/* ---------- 签名收束 ---------- */

.page-contact .contact-sign {
  padding-block: clamp(2rem, 5vw, 3.5rem) clamp(2.5rem, 6vw, 4rem);
}

.page-contact .contact-sign__line {
  margin: 0;
  height: 1px;
  background-color: var(--rule-2);
}

.page-contact .contact-sign__text {
  margin: clamp(1.5rem, 4vw, 2.25rem) 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 3.4vw, 1.75rem);
  font-weight: 600;
  line-height: 1.4;
  color: var(--ink-900);
}

.page-contact .contact-sign__meta {
  margin: 0.6rem 0 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--ink-600);
}

/* ---------- 平板及以上 ---------- */

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

  .page-contact .contact-hero__field {
    grid-template-columns: 5.5rem minmax(0, 1fr);
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero__shell {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 0.68fr);
    align-items: start;
  }

  .page-contact .contact-hero__aside {
    margin-top: clamp(1rem, 3vw, 2.5rem);
  }

  .page-contact .contact-paths__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-contact .path-card--phone {
    margin-top: 1.75rem;
  }

  .page-contact .path-card--post {
    margin-top: 0.5rem;
  }

  .page-contact .contact-compose__shell {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.66fr);
    align-items: start;
  }

  .page-contact .contact-corrections__shell {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(2rem, 5vw, 4rem);
  }

  .page-contact .contact-partners__panel {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    align-items: start;
  }

  .page-contact .contact-partners__side {
    padding-left: clamp(1rem, 3vw, 2rem);
    border-left: var(--hair) solid var(--rule);
  }

  .page-contact .contact-record__shell {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

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

@media (min-width: 1180px) {
  .page-contact .contact-paths__grid {
    gap: clamp(1.5rem, 2.5vw, 2.25rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact *,
  .page-contact *::before,
  .page-contact *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
  }
}