.page-contact {
  --ct-key: 9.5rem;
  --ct-pad-block: clamp(56px, 8vw, 112px);
}

/* ===== 分区底色与节奏 ===== */
.page-contact .zone {
  padding-block: var(--ct-pad-block);
  position: relative;
}

.page-contact .zone--ink {
  background-color: var(--ink-900);
  color: var(--porcelain-000);
}

.page-contact .zone--deep {
  background-color: var(--ink-700);
  color: var(--porcelain-000);
}

.page-contact .zone--paper {
  background-color: var(--paper-050);
  color: var(--ink-900);
}

.page-contact .zone--paper-2 {
  background-color: var(--paper-200);
  color: var(--ink-900);
}

.page-contact .zone + .zone {
  border-top: 1px solid var(--hairline-gold);
}

/* ===== 首屏 ===== */
.page-contact .ct-hero {
  padding-block: clamp(26px, 4vw, 46px) clamp(56px, 8vw, 104px);
}

.page-contact .ct-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 4.4vw, 56px);
  margin-top: clamp(26px, 4vw, 48px);
}

.page-contact .ct-h1 {
  font-family: var(--font-title);
  font-size: clamp(1.9rem, 4.8vw, 3.2rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
  max-width: 18ch;
}

.page-contact .ct-lede {
  max-width: 34em;
  color: var(--paper-050);
}

.page-contact .ct-hero-note {
  margin: 22px 0 0;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  line-height: 1.8;
  color: var(--blue-200);
}

.page-contact .ct-hero-side {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 24px;
}

.page-contact .ct-seal {
  width: clamp(56px, 8vw, 78px);
  height: auto;
  color: var(--gold-600);
}

.page-contact .ct-toc {
  width: 100%;
  max-width: 24rem;
}

.page-contact .ct-toc-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--gold-300);
  margin: 0 0 12px;
}

.page-contact .ct-toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-contact .ct-toc-link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--hairline-gold);
  color: var(--porcelain-000);
  text-decoration: none;
  font-size: 0.96rem;
  line-height: 1.6;
  transition: color var(--dur-fast) var(--ease), padding-left var(--dur-fast) var(--ease);
}

.page-contact .ct-toc-link:hover,
.page-contact .ct-toc-link:focus-visible {
  color: var(--gold-300);
  padding-left: 6px;
}

.page-contact .ct-toc-no {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--gold-600);
  flex: none;
}

/* ===== 章节通用 ===== */
.page-contact .ct-section-lead {
  font-size: 1.0625rem;
  line-height: 1.9;
  margin: 0 0 clamp(22px, 3vw, 34px);
  max-width: 40em;
  color: inherit;
}

.page-contact .zone--ink .ct-section-lead,
.page-contact .zone--deep .ct-section-lead {
  color: var(--paper-050);
}

.page-contact .ct-note-inline {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.85;
  letter-spacing: 0.02em;
  color: var(--blue-200);
  margin: 0;
  max-width: 34em;
}

/* ===== 渠道区 ===== */
.page-contact .ct-channel-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 4.4vw, 56px);
}

.page-contact .ct-media {
  margin: 0;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--ink-700);
}

.page-contact .ct-media img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-contact .ct-channels {
  margin: 0;
  display: grid;
  gap: 0;
}

.page-contact .ct-channel {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding-block: clamp(20px, 2.8vw, 30px);
  border-top: 1px solid var(--hairline-ink);
}

.page-contact .ct-channel:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-contact .ct-channel dd {
  margin: 0;
}

.page-contact .ct-channel-key {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--blue-700);
}

.page-contact .ct-channel-no {
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  color: var(--muted-500);
}

.page-contact .ct-channel-val {
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 2.2vw, 1.35rem);
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.5;
  color: var(--ink-900);
  overflow-wrap: anywhere;
}

.page-contact .ct-channel-desc {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--muted-500);
  max-width: 40em;
}

/* ===== 核验区 ===== */
.page-contact .ct-verify-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 3.6vw, 48px);
}

.page-contact .ct-checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  max-width: 46rem;
}

.page-contact .ct-check {
  display: grid;
  grid-template-columns: 1.25rem 2.4rem minmax(0, 1fr);
  align-items: start;
  gap: 14px;
  padding: clamp(14px, 2vw, 20px) 0;
  border-bottom: 1px solid var(--hairline-gold);
  cursor: pointer;
}

.page-contact .ct-checklist > li:first-child .ct-check {
  border-top: 1px solid var(--hairline-gold);
}

.page-contact .ct-check-box {
  appearance: none;
  -webkit-appearance: none;
  width: 1.25rem;
  height: 1.25rem;
  margin: 3px 0 0;
  border: 1px solid var(--gold-300);
  border-radius: 5px;
  background-color: transparent;
  position: relative;
  cursor: pointer;
  transition: background-color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.page-contact .ct-check-box:checked {
  background-color: var(--gold-600);
  border-color: var(--gold-600);
}

.page-contact .ct-check-box:checked::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 2px;
  width: 5px;
  height: 10px;
  border: solid var(--ink-900);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.page-contact .ct-check-box:focus-visible {
  outline: 2px solid var(--gold-300);
  outline-offset: 3px;
}

.page-contact .ct-check-no {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--gold-300);
  padding-top: 3px;
}

.page-contact .ct-check-text {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--paper-050);
  transition: color var(--dur-fast) var(--ease);
}

.page-contact .ct-check-box:checked ~ .ct-check-text {
  color: var(--blue-200);
}

/* ===== 回复时段区 ===== */
.page-contact .ct-window-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 4vw, 52px);
}

.page-contact .ct-window {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 20px;
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  background-color: var(--blue-700);
  color: var(--porcelain-000);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.page-contact .ct-window-main .ct-section-lead {
  margin-bottom: 18px;
  color: var(--ink-900);
}

.page-contact .ct-window-main .ct-section-lead:last-child {
  margin-bottom: 0;
}

.page-contact .ct-window-media {
  margin: 0;
  width: 100%;
  max-width: 340px;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--ink-700);
}

.page-contact .ct-window-media img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

/* ===== 替代入口区 ===== */
.page-contact .ct-alt-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-contact .ct-alt-link {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 6px 20px;
  padding: clamp(16px, 2.2vw, 24px) 0;
  border-top: 1px solid var(--hairline-ink);
  text-decoration: none;
  color: var(--ink-900);
  transition: color var(--dur-fast) var(--ease), padding-left var(--dur-fast) var(--ease);
}

.page-contact .ct-alt-list > li:last-child .ct-alt-link {
  border-bottom: 1px solid var(--hairline-ink);
}

.page-contact .ct-alt-link:hover,
.page-contact .ct-alt-link:focus-visible {
  color: var(--blue-700);
  padding-left: 10px;
}

.page-contact .ct-alt-title {
  font-family: var(--font-title);
  font-size: clamp(1rem, 2vw, 1.18rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.5;
}

.page-contact .ct-alt-from {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--muted-500);
  opacity: 1;
  transition: opacity var(--dur-fast) var(--ease);
}

/* ===== 备案停顿区 ===== */
.page-contact .ct-filing {
  padding-block: clamp(48px, 7vw, 92px);
}

.page-contact .ct-filing-inner {
  border-top: 1px solid var(--hairline-gold);
  padding-top: 26px;
  display: grid;
  gap: 14px;
}

.page-contact .ct-filing-line {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(0.95rem, 1.8vw, 1.1rem);
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--gold-300);
}

.page-contact .ct-filing-note {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.85;
  max-width: 42em;
  color: var(--paper-050);
  opacity: 0.72;
}

/* ===== 响应式 ===== */
@media (min-width: 720px) {
  .page-contact .ct-channel {
    grid-template-columns: var(--ct-key) minmax(0, 1fr);
    column-gap: clamp(20px, 2.6vw, 34px);
  }

  .page-contact .ct-channel-key {
    grid-column: 1;
    grid-row: 1 / span 3;
    padding-top: 4px;
  }

  .page-contact .ct-channel-val,
  .page-contact .ct-channel-desc {
    grid-column: 2;
  }

  .page-contact .ct-alt-from {
    opacity: 0;
  }

  .page-contact .ct-alt-link:hover .ct-alt-from,
  .page-contact .ct-alt-link:focus-visible .ct-alt-from {
    opacity: 1;
  }
}

@media (min-width: 900px) {
  .page-contact .ct-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-contact .ct-hero-side {
    align-items: flex-end;
    padding-top: 6px;
  }

  .page-contact .ct-channel-layout {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-contact .ct-media {
    margin-top: 42px;
  }

  .page-contact .ct-verify-layout {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-contact .ct-window-main {
    grid-column: 1;
  }

  .page-contact .ct-window-media {
    grid-column: 2;
    margin-left: auto;
  }
}

@media (min-width: 860px) {
  .page-contact .ct-window-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }
}

@media (max-width: 420px) {
  .page-contact {
    --ct-key: 100%;
  }

  .page-contact .ct-check {
    grid-template-columns: 1.15rem minmax(0, 1fr);
    row-gap: 6px;
  }

  .page-contact .ct-check-no {
    grid-column: 2;
    padding-top: 0;
  }

  .page-contact .ct-check-text {
    grid-column: 2;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .ct-toc-link,
  .page-contact .ct-alt-link,
  .page-contact .ct-check-box,
  .page-contact .ct-check-text,
  .page-contact .ct-alt-from {
    transition: none;
  }

  .page-contact .ct-alt-link:hover,
  .page-contact .ct-alt-link:focus-visible,
  .page-contact .ct-toc-link:hover,
  .page-contact .ct-toc-link:focus-visible {
    padding-left: 0;
  }
}
<<<END>>>