.page-contact {
  --ct-axis: rgba(154, 164, 196, 0.28);
  --ct-hair: rgba(38, 53, 107, 0.85);
  --ct-block: clamp(2.5rem, 6vw, 5rem);
  background: var(--deep);
  color: var(--starlight);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-contact .breadcrumb {
  padding-top: clamp(1.25rem, 3.5vw, 2.25rem);
  font-size: var(--fs-xs);
  letter-spacing: 0.06em;
}

/* ---------- 首屏 ---------- */
.page-contact .signal-hero {
  padding: clamp(1.25rem, 3.5vw, 2.25rem) 0 var(--ct-block);
}

.page-contact .signal-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.75rem);
}

.page-contact .signal-hero__plate {
  position: relative;
  margin: 0;
  border: 1px solid var(--orbit);
  background: var(--nebula);
  overflow: hidden;
}

.page-contact .signal-hero__plate img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  opacity: 0.82;
}

.page-contact .signal-hero__plate::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 26px;
  background-image: repeating-linear-gradient(
    to right,
    rgba(154, 164, 196, 0.45) 0 1px,
    transparent 1px 24px
  );
  pointer-events: none;
}

.page-contact .signal-hero__plate-cap {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 1;
  padding: 0.55rem 0.9rem;
  background: var(--deep);
  border-top: 1px solid var(--orbit);
  border-right: 1px solid var(--orbit);
  font-size: var(--fs-xs);
  letter-spacing: 0.16em;
  color: var(--pulse);
}

.page-contact .signal-hero__eyebrow {
  margin: 0 0 0.9rem;
  font-size: var(--fs-xs);
  letter-spacing: 0.22em;
  color: var(--violet);
}

.page-contact .signal-hero__copy h1 {
  margin: 0 0 1.1rem;
  font-size: clamp(1.85rem, 5.4vw, 3.1rem);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: 0.03em;
  max-width: 18ch;
}

.page-contact .signal-hero__lead {
  margin: 0 0 1.6rem;
  max-width: 46ch;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: var(--obs);
}

.page-contact .signal-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ---------- 区块标题 ---------- */
.page-contact .section-head {
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

.page-contact .section-head__index {
  margin: 0 0 0.75rem;
  font-size: var(--fs-xs);
  letter-spacing: 0.2em;
}

.page-contact .section-head__title {
  margin: 0 0 0.85rem;
  font-size: clamp(1.4rem, 3.6vw, 2.1rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 0.02em;
}

.page-contact .section-head__lead {
  margin: 0;
  max-width: 52ch;
  font-size: var(--fs-sm);
  line-height: 1.85;
}

/* ---------- 联系渠道 ---------- */
.page-contact .channels {
  padding: var(--ct-block) 0;
  background: var(--nebula);
  border-top: 1px solid var(--orbit);
  border-bottom: 1px solid var(--orbit);
}

.page-contact .channels .section-head__index {
  color: var(--violet);
}

.page-contact .channels .section-head__lead {
  color: var(--obs);
}

.page-contact .channel-rack {
  position: relative;
  padding-left: 1.6rem;
}

.page-contact .channel-rack::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 1px;
  background: var(--ct-axis);
}

.page-contact .channel-card {
  position: relative;
  padding: 1.35rem 0 1.5rem;
  border-bottom: 1px solid var(--ct-hair);
  transition: border-color 200ms var(--ease);
}

.page-contact .channel-card:first-child {
  padding-top: 0.35rem;
}

.page-contact .channel-card:last-child {
  border-bottom: none;
  padding-bottom: 0.35rem;
}

.page-contact .channel-card::before {
  content: "";
  position: absolute;
  left: calc(-1.6rem + 0px);
  top: 0.9rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--pulse);
  animation: ct-pulse 2.4s ease-in-out infinite;
}

.page-contact .channel-card:first-child::before {
  top: 0.6rem;
}

.page-contact .channel-card:hover,
.page-contact .channel-card:focus-within {
  border-bottom-color: var(--pulse);
}

@keyframes ct-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(53, 224, 208, 0.42); }
  50%      { box-shadow: 0 0 0 7px rgba(53, 224, 208, 0); }
}

.page-contact .channel-card__kind {
  margin: 0 0 0.55rem;
  font-size: var(--fs-xs);
  letter-spacing: 0.18em;
  color: var(--violet);
}

.page-contact .channel-card__value {
  margin: 0 0 0.7rem;
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2.7vw, 1.3rem);
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: 0.01em;
  color: var(--starlight);
  word-break: break-word;
}

.page-contact .channel-card__use {
  margin: 0 0 1rem;
  max-width: 58ch;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: var(--obs);
}

.page-contact .channel-card__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
}

.page-contact .channel-card__copy {
  font: inherit;
  font-size: var(--fs-xs);
  letter-spacing: 0.12em;
  padding: 0.5rem 0.95rem;
  background: transparent;
  border: 1px solid var(--orbit);
  color: var(--pulse);
  cursor: pointer;
  transition: background 200ms var(--ease), color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-contact .channel-card__copy:hover,
.page-contact .channel-card__copy:focus-visible {
  background: var(--pulse);
  border-color: var(--pulse);
  color: var(--deep);
}

.page-contact .channel-card__meta {
  font-size: var(--fs-xs);
  letter-spacing: 0.1em;
  color: var(--obs);
}

/* ---------- 反馈清单（暖纸面） ---------- */
.page-contact .brief {
  padding: var(--ct-block) 0;
  background: var(--paper);
  color: var(--ink);
}

.page-contact .brief .section-head__index {
  color: var(--violet);
}

.page-contact .brief .section-head__title {
  color: var(--ink);
}

.page-contact .brief .section-head__lead {
  color: var(--ink-soft);
}

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

.page-contact .brief-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--paper-line);
}

.page-contact .brief-item {
  border-bottom: 1px solid var(--paper-line);
}

.page-contact .brief-item__label {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.15rem 0.25rem;
  cursor: pointer;
}

.page-contact .brief-item__check {
  flex: none;
  width: 1.15rem;
  height: 1.15rem;
  margin: 0.28rem 0 0;
  padding: 0;
  appearance: none;
  -webkit-appearance: none;
  border: 1px solid var(--orbit);
  background: transparent;
  cursor: pointer;
  transition: background 180ms var(--ease), border-color 180ms var(--ease), box-shadow 180ms var(--ease);
}

.page-contact .brief-item__check:checked {
  background: var(--violet);
  border-color: var(--violet);
  box-shadow: inset 0 0 0 3px var(--paper);
}

.page-contact .brief-item__check:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

.page-contact .brief-item__body {
  display: grid;
  gap: 0.35rem;
}

.page-contact .brief-item__num {
  font-size: var(--fs-xs);
  letter-spacing: 0.16em;
  color: var(--violet);
}

.page-contact .brief-item__title {
  font-size: var(--fs-md);
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-contact .brief-item__hint {
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-contact .brief-item__label:hover .brief-item__title {
  color: var(--violet);
}

.page-contact .brief__side {
  display: grid;
  gap: 1.1rem;
  align-content: start;
}

.page-contact .brief__figure {
  margin: 0;
  border: 1px solid var(--paper-line);
  background: var(--nebula);
  overflow: hidden;
}

.page-contact .brief__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 11 / 7;
  object-fit: cover;
}

.page-contact .brief__caption {
  padding: 0.7rem 0.95rem;
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  color: var(--starlight);
  background: var(--nebula);
}

.page-contact .brief__note {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-contact .brief__link,
.page-contact .coverage__link {
  justify-self: start;
  font-size: var(--fs-sm);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--violet);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-contact .brief__link:hover,
.page-contact .brief__link:focus-visible,
.page-contact .coverage__link:hover,
.page-contact .coverage__link:focus-visible {
  border-bottom-color: var(--violet);
}

/* ---------- 处理流程 ---------- */
.page-contact .respond {
  padding: var(--ct-block) 0;
  background: var(--deep);
}

.page-contact .respond .section-head__index {
  color: var(--violet);
}

.page-contact .respond .section-head__lead {
  color: var(--obs);
}

.page-contact .respond-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.85rem;
}

.page-contact .respond-step {
  display: grid;
  gap: 0.5rem;
  align-content: start;
  padding: 1.15rem 1.1rem 1.35rem;
  background: var(--nebula);
  border: 1px solid var(--orbit);
  transition: border-color 200ms var(--ease), background 200ms var(--ease);
}

.page-contact .respond-step:hover {
  border-color: var(--pulse);
  background: #14204a;
}

.page-contact .respond-step__num {
  font-size: var(--fs-xs);
  letter-spacing: 0.2em;
  color: var(--violet);
}

.page-contact .respond-step__title {
  margin: 0;
  font-size: var(--fs-md);
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--starlight);
}

.page-contact .respond-step__text {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: var(--obs);
}

/* ---------- 协作沟通 ---------- */
.page-contact .partners {
  padding: var(--ct-block) 0;
  background: var(--nebula);
  border-top: 1px solid var(--orbit);
  border-bottom: 1px solid var(--orbit);
}

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

.page-contact .partners__copy h2 {
  margin: 0 0 1rem;
  font-size: clamp(1.35rem, 3.4vw, 1.95rem);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: 0.02em;
  color: var(--starlight);
}

.page-contact .partners__copy .section-head__index {
  margin: 0 0 0.75rem;
  color: var(--violet);
}

.page-contact .partners__copy p {
  margin: 0 0 0.95rem;
  max-width: 52ch;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: var(--obs);
}

.page-contact .partners__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  align-content: start;
}

.page-contact .partners-item {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--ct-hair);
}

.page-contact .partners-item:first-child {
  border-top: 1px solid var(--ct-hair);
}

.page-contact .partners-item__num {
  flex: none;
  min-width: 2.6ch;
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--pulse);
  letter-spacing: 0.02em;
}

.page-contact .partners-item__text {
  font-size: var(--fs-sm);
  line-height: 1.75;
  color: var(--obs);
}

/* ---------- 服务范围 ---------- */
.page-contact .coverage {
  padding: var(--ct-block) 0;
  background: var(--deep);
}

.page-contact .coverage .section-head__index {
  color: var(--violet);
}

.page-contact .coverage .section-head__lead {
  color: var(--obs);
}

.page-contact .coverage__list {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.page-contact .coverage__item {
  display: flex;
  align-items: baseline;
  gap: 1.1rem;
  padding: 1rem 0;
  border-top: 1px solid var(--ct-hair);
}

.page-contact .coverage__item:last-child {
  border-bottom: 1px solid var(--ct-hair);
}

.page-contact .coverage__num {
  flex: none;
  min-width: 3.2ch;
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--orange);
  letter-spacing: 0.02em;
}

.page-contact .coverage__label {
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: var(--obs);
}

.page-contact .coverage__note {
  margin: 0 0 1rem;
  max-width: 58ch;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: var(--obs);
}

.page-contact .coverage__link {
  display: inline-block;
  color: var(--pulse);
}

.page-contact .coverage__link:hover,
.page-contact .coverage__link:focus-visible {
  border-bottom-color: var(--pulse);
}

/* ---------- 结束语 ---------- */
.page-contact .closing {
  padding: 0 0 clamp(2rem, 5vw, 3.5rem);
  background: var(--deep);
}

.page-contact .closing__inner {
  display: grid;
  gap: 0.85rem;
  padding-top: clamp(1.5rem, 4vw, 2.5rem);
  border-top: 1px solid var(--ct-hair);
}

.page-contact .closing__scale {
  font-size: var(--fs-xs);
  letter-spacing: 0.22em;
  color: var(--violet);
}

.page-contact .closing__text {
  margin: 0;
  font-size: var(--fs-md);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--starlight);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-contact .respond-steps {
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    align-items: start;
  }

  .page-contact .respond-step {
    border-right: none;
  }

  .page-contact .respond-step:last-child {
    border-right: 1px solid var(--orbit);
  }

  .page-contact .respond-step:nth-child(1) { min-height: 168px; }
  .page-contact .respond-step:nth-child(2) { min-height: 202px; }
  .page-contact .respond-step:nth-child(3) { min-height: 236px; }
  .page-contact .respond-step:nth-child(4) { min-height: 270px; }

  .page-contact .coverage__list {
    grid-template-columns: repeat(2, 1fr);
    gap: 0 2.5rem;
  }

  .page-contact .coverage__item:nth-child(2) {
    border-top: 1px solid var(--ct-hair);
  }
}

@media (min-width: 900px) {
  .page-contact .signal-hero__grid {
    grid-template-columns: 1.05fr 1fr;
    align-items: end;
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-contact .signal-hero__plate img {
    aspect-ratio: 16 / 11;
  }

  .page-contact .channel-rack {
    padding-left: 2.4rem;
  }

  .page-contact .channel-rack::before {
    left: 5px;
  }

  .page-contact .channel-card {
    padding: 1.6rem 0 1.8rem;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "kind kind"
      "value value"
      "use  use"
      "foot foot";
    column-gap: 1.5rem;
  }

  .page-contact .channel-card__kind { grid-area: kind; }
  .page-contact .channel-card__value { grid-area: value; }
  .page-contact .channel-card__use { grid-area: use; }
  .page-contact .channel-card__foot { grid-area: foot; }

  .page-contact .channel-card::before {
    left: calc(-2.4rem + 1px);
  }

  .page-contact .brief__grid {
    grid-template-columns: 1.15fr 1fr;
    align-items: start;
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-contact .partners__grid {
    grid-template-columns: 1.15fr 1fr;
    align-items: start;
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-contact .respond-step {
    padding: 1.35rem 1.25rem 1.5rem;
  }
}

@media (min-width: 1080px) {
  .page-contact .signal-hero__copy {
    padding-bottom: 0.5rem;
  }

  .page-contact .coverage__list {
    grid-template-columns: repeat(4, 1fr);
    gap: 0 2rem;
  }

  .page-contact .coverage__item {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.6rem;
    padding: 1.25rem 0 1.5rem;
  }

  .page-contact .coverage__item:nth-child(2) {
    border-top: 1px solid var(--ct-hair);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card::before {
    animation: none;
  }

  .page-contact .channel-card,
  .page-contact .channel-card__copy,
  .page-contact .respond-step,
  .page-contact .brief-item__check,
  .page-contact .brief__link,
  .page-contact .coverage__link {
    transition: none;
  }
}