.page-contact {
  --contact-gap: clamp(2.25rem, 5vw, 4.5rem);
  --contact-line: rgba(47, 93, 78, 0.55);
  --contact-line-soft: rgba(138, 147, 142, 0.28);
  --contact-amber-line: rgba(232, 163, 61, 0.55);
  --contact-amber-soft: rgba(232, 163, 61, 0.28);
  --contact-ink-text: rgba(242, 239, 230, 0.78);
  --contact-ink-text-dim: rgba(242, 239, 230, 0.58);
  --contact-paper-text: rgba(14, 42, 36, 0.82);
  display: block;
  background: var(--ink);
  color: var(--paper);
  overflow-x: hidden;
}

/* ---------- 面包屑与首屏 ---------- */

.page-contact .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  padding: clamp(1rem, 2.5vw, 1.75rem) 0 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--contact-ink-text-dim);
}

.page-contact .breadcrumb a {
  color: var(--contact-ink-text-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 180ms ease, border-color 180ms ease;
}

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

.page-contact .breadcrumb [aria-current="page"] {
  color: var(--cyan);
}

.page-contact .contact-hero {
  position: relative;
  padding: clamp(1.75rem, 4vw, 3rem) 0 clamp(2.5rem, 6vw, 5.5rem);
  background:
    radial-gradient(120% 78% at 88% 4%, rgba(53, 240, 200, 0.11), transparent 62%),
    radial-gradient(90% 60% at 6% 96%, rgba(169, 96, 63, 0.14), transparent 68%),
    var(--ink);
}

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

.page-contact .contact-hero__text {
  min-width: 0;
}

.page-contact .contact-hero__title {
  margin: 0.85rem 0 0;
  font-size: clamp(2.15rem, 7.2vw, 4.9rem);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.02em;
  max-width: 17ch;
}

.page-contact .contact-hero__lede {
  margin: 1.35rem 0 0;
  max-width: 34em;
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  line-height: 1.78;
  color: var(--contact-ink-text);
}

.page-contact .contact-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.85rem;
}

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

/* ---------- 图片容器 ---------- */

.page-contact .contact-figure {
  position: relative;
  display: block;
  border: 1px solid var(--moss-line);
  background: var(--moss);
  overflow: hidden;
}

.page-contact .contact-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: grayscale(0.42) contrast(1.06) brightness(0.9);
}

.page-contact .contact-figure__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 0.75rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  line-height: 1.6;
  color: var(--paper);
  background: linear-gradient(to top, rgba(7, 26, 22, 0.9), rgba(7, 26, 22, 0));
}

/* ---------- 章节通用头部 ---------- */

.page-contact .contact-sec {
  position: relative;
}

.page-contact .contact-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.6rem;
  margin-bottom: clamp(2rem, 4.5vw, 3.5rem);
}

.page-contact .contact-head__body {
  min-width: 0;
}

.page-contact .contact-head__title {
  margin: 0.5rem 0 0;
  font-size: clamp(1.5rem, 3.6vw, 2.35rem);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.01em;
  max-width: 22ch;
}

.page-contact .contact-head__note {
  margin: 0.95rem 0 0;
  max-width: 34em;
  font-size: 0.9375rem;
  line-height: 1.78;
}

.page-contact .section--paper .contact-head__note {
  color: var(--contact-paper-text);
}

.page-contact .section--ink .contact-head__note,
.page-contact .section--moss .contact-head__note {
  color: var(--contact-ink-text);
}

.page-contact .chapter-no {
  font-family: var(--font-mono);
  font-size: clamp(1.75rem, 4.2vw, 2.75rem);
  line-height: 1;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--stone);
  transition: color 320ms ease;
}

.page-contact .section--paper .chapter-no {
  color: var(--clay);
}

.page-contact .section--ink.is-active .chapter-no,
.page-contact .section--moss.is-active .chapter-no {
  color: var(--cyan);
}

.page-contact .section--paper.is-active .chapter-no {
  color: var(--amber);
}

.page-contact .contact-sec__tail {
  margin: clamp(1.75rem, 3.5vw, 2.5rem) 0 0;
  max-width: 34em;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--contact-ink-text);
}

.page-contact .section--paper .contact-sec__tail {
  color: var(--contact-paper-text);
}

/* ---------- 章节 01 · 合作方向标签页 ---------- */

.page-contact .contact-sec--coop {
  background: var(--paper) !important;
  color: var(--ink);
}

.page-contact .section--paper .eyebrow {
  color: var(--clay);
}

.page-contact .contact-tabs {
  border-top: 1px solid rgba(169, 96, 63, 0.4);
  padding-top: clamp(1.25rem, 3vw, 2rem);
}

.page-contact .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0;
  margin: 0;
}

.page-contact .tabs__tab {
  appearance: none;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  padding: 0.62rem 0.95rem;
  background: transparent;
  border: 1px solid rgba(14, 42, 36, 0.28);
  color: rgba(14, 42, 36, 0.66);
  cursor: pointer;
  transition: background 180ms ease, color 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.page-contact .tabs__tab:hover {
  border-color: var(--moss);
  color: var(--moss);
}

.page-contact .tabs__tab[aria-selected="true"] {
  background: var(--active);
  border-color: var(--active);
  color: var(--cyan);
}

.page-contact .tabs__panel {
  padding-top: clamp(1.5rem, 3vw, 2.25rem);
}

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

.page-contact .contact-panel {
  max-width: 40em;
  border-left: 2px solid var(--amber);
  padding-left: clamp(1rem, 2.5vw, 1.75rem);
}

.page-contact .contact-panel__title {
  margin: 0;
  font-size: clamp(1.125rem, 2.4vw, 1.375rem);
  font-weight: 500;
  line-height: 1.35;
  color: var(--ink);
}

.page-contact .contact-panel__text {
  margin: 0.9rem 0 0;
  font-size: 1rem;
  line-height: 1.82;
  color: var(--contact-paper-text);
}

.page-contact .contact-panel__meta {
  margin: 1.15rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  line-height: 1.7;
  color: var(--clay);
}

/* ---------- 章节 02 · 纠错流程 ---------- */

.page-contact .contact-sec--fix {
  background: var(--ink);
}

.page-contact .fix-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--contact-amber-line);
}

.page-contact .fix-step {
  display: grid;
  grid-template-columns: 2.25rem minmax(0, 1fr);
  gap: 0.85rem 1.1rem;
  padding: clamp(1.15rem, 2.8vw, 1.7rem) 0;
  border-bottom: 1px solid var(--contact-amber-soft);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 420ms ease, transform 420ms ease;
}

.page-contact .fix-step.is-visible {
  opacity: 1;
  transform: none;
}

.page-contact .fix-step__no {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  letter-spacing: 0.12em;
  line-height: 1.6;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.page-contact .fix-step__body {
  min-width: 0;
}

.page-contact .fix-step__title {
  margin: 0;
  font-size: clamp(1.0625rem, 2.2vw, 1.2rem);
  font-weight: 500;
  line-height: 1.4;
}

.page-contact .fix-step__text {
  margin: 0.55rem 0 0;
  max-width: 33em;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--contact-ink-text);
}

/* ---------- 章节 03 · 联系方式 ---------- */

.page-contact .contact-sec--channels {
  background: var(--moss) !important;
}

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

.page-contact .contact-channels {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--contact-amber-line);
  min-width: 0;
}

.page-contact .contact-channels > li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.4rem;
  padding: clamp(1.15rem, 3vw, 1.6rem) 0;
  border-bottom: 1px solid var(--contact-amber-soft);
}

.page-contact .contact-channels__label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--stone);
}

.page-contact .contact-channels__value {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2.6vw, 1.4rem);
  line-height: 1.5;
  letter-spacing: 0.01em;
  color: var(--paper);
  word-break: break-word;
  overflow-wrap: anywhere;
}

.page-contact .contact-channels__value a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 240, 200, 0.45);
  transition: color 180ms ease, border-color 180ms ease;
}

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

.page-contact .contact-channels__hint {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--contact-ink-text);
}

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

.page-contact .contact-sec__tail--moss {
  color: var(--contact-ink-text);
  border-top: 1px solid var(--contact-amber-soft);
  padding-top: clamp(1.25rem, 3vw, 1.75rem);
}

/* ---------- 章节 04 · 服务时间 ---------- */

.page-contact .contact-facts {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  border-top: 1px solid var(--contact-line);
}

.page-contact .contact-fact {
  padding: clamp(1.25rem, 3vw, 1.85rem) 0;
  border-bottom: 1px solid var(--contact-line-soft);
}

.page-contact .contact-fact__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--stone);
}

.page-contact .contact-fact__value {
  margin: 0.6rem 0 0;
  font-family: var(--font-mono);
  font-size: clamp(1.125rem, 3vw, 1.6rem);
  line-height: 1.3;
  letter-spacing: 0.01em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-contact .contact-fact__text {
  margin: 0.75rem 0 0;
  max-width: 32em;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--contact-ink-text);
}

/* ---------- 章节 05 · 备案与地域 ---------- */

.page-contact .contact-sec--filing {
  background: var(--paper) !important;
  color: var(--ink);
}

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

.page-contact .contact-filing__kv {
  margin: 0;
  border-top: 1px solid var(--contact-amber-line);
  min-width: 0;
}

.page-contact .contact-filing__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.35rem;
  padding: 0.95rem 0;
  border-bottom: 1px solid rgba(169, 96, 63, 0.28);
}

.page-contact .contact-filing__row dt {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--clay);
}

.page-contact .contact-filing__row dd {
  margin: 0;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.page-contact .contact-filing__row dd.numeric {
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

.page-contact .contact-filing__aside {
  min-width: 0;
}

.page-contact .contact-filing__text {
  margin: 0 0 1.1rem;
  max-width: 32em;
  font-size: 0.9375rem;
  line-height: 1.82;
  color: var(--contact-paper-text);
}

.page-contact .contact-filing__text:last-child {
  margin-bottom: 0;
}

/* ---------- 链接与焦点 ---------- */

.page-contact .link-more {
  color: var(--clay);
  text-decoration: none;
  border-bottom: 1px solid rgba(169, 96, 63, 0.45);
  transition: color 180ms ease, border-color 180ms ease;
}

.page-contact .link-more:hover {
  color: var(--amber);
  border-color: var(--amber);
}

.page-contact .section--ink .link-more,
.page-contact .section--moss .link-more {
  color: var(--cyan);
  border-bottom-color: rgba(53, 240, 200, 0.45);
}

.page-contact .section--ink .link-more:hover,
.page-contact .section--moss .link-more:hover {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

.page-contact a:focus-visible,
.page-contact button:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-contact .section--paper a:focus-visible,
.page-contact .section--paper button:focus-visible {
  outline-color: var(--clay);
}

/* ---------- 响应式 ---------- */

@media (min-width: 40rem) {
  .page-contact .contact-channels > li {
    grid-template-columns: 8.5rem minmax(0, 1fr);
    align-items: baseline;
    column-gap: 1.75rem;
  }

  .page-contact .contact-channels__label {
    grid-row: span 2;
  }

  .page-contact .contact-channels__hint {
    grid-column: 2;
  }

  .page-contact .contact-filing__row {
    grid-template-columns: 11rem minmax(0, 1fr);
    align-items: baseline;
    gap: 1.5rem;
  }

  .page-contact .contact-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    column-gap: clamp(1.5rem, 3vw, 2.5rem);
  }

  .page-contact .contact-fact {
    padding-right: 0.5rem;
  }
}

@media (min-width: 52rem) {
  .page-contact .contact-head {
    grid-template-columns: 5.5rem minmax(0, 1fr);
    column-gap: clamp(1.5rem, 3vw, 2.75rem);
    align-items: start;
  }

  .page-contact .contact-head__title {
    margin-top: 0.85rem;
  }
}

@media (min-width: 60rem) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    column-gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-contact .contact-channels-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

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

  .page-contact .fix-step {
    grid-template-columns: 3.25rem minmax(0, 1fr);
    column-gap: 1.75rem;
  }
}

@media (min-width: 76rem) {
  .page-contact .contact-hero__title {
    max-width: 19ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .fix-step {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-contact .chapter-no,
  .page-contact .tabs__tab,
  .page-contact .link-more,
  .page-contact .contact-channels__value a {
    transition: none;
  }
}