.page-contact {
  --contact-gap: 14px;
  --contact-pad: clamp(18px, 3vw, 26px);
  background: var(--ink-900);
  color: var(--mist-050);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-contact .breadcrumb {
  padding-top: clamp(20px, 4vw, 34px);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  padding-top: clamp(20px, 4vw, 36px);
}

.page-contact .contact-hero__grid {
  display: grid;
  gap: 28px;
  align-items: start;
}

.page-contact .contact-hero__lead h1 {
  margin: 10px 0 16px;
  font-size: clamp(30px, 6.4vw, 58px);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--mist-050);
}

.page-contact .contact-hero__deck {
  max-width: 46ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate-300);
}

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

/* ---------- 版本核对条 ---------- */
.page-contact .version-bar {
  margin-top: clamp(22px, 4vw, 32px);
  padding: var(--contact-pad);
  background: var(--ink-800);
  border: 2px solid var(--line-600);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
  display: grid;
  gap: 14px;
}

.page-contact .version-bar__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--line-600);
}

.page-contact .version-bar__label {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--slate-300);
}

.page-contact .version-bar__code {
  font-family: var(--font-mono);
  font-size: clamp(26px, 5vw, 34px);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--teal-400);
}

.page-contact .version-bar__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
}

.page-contact .version-bar__hint {
  flex: 1 1 200px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate-300);
}

.page-contact .version-bar__more {
  border-top: 2px solid var(--line-600);
  padding-top: 12px;
}

.page-contact .version-bar__more summary {
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  color: var(--orange-500);
  list-style: none;
}

.page-contact .version-bar__more summary::-webkit-details-marker {
  display: none;
}

.page-contact .version-bar__more summary::before {
  content: "+ ";
  font-family: var(--font-mono);
}

.page-contact .version-bar__more[open] summary::before {
  content: "− ";
}

.page-contact .version-bar__more p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate-300);
}

/* ---------- 章节头 ---------- */
.page-contact .section__head h2 {
  margin: 0;
  font-size: clamp(22px, 3.6vw, 32px);
  font-weight: 700;
  line-height: 1.25;
  color: var(--mist-050);
}

.page-contact .section__note {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate-300);
}

/* ---------- 三步 ---------- */
.page-contact .step-list {
  list-style: none;
  margin: clamp(22px, 4vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: var(--contact-gap);
  counter-reset: none;
}

.page-contact .step-card {
  position: relative;
  padding: var(--contact-pad);
  padding-left: calc(var(--contact-pad) + 6px);
  background: var(--ink-800);
  border: 2px solid var(--line-600);
  border-left: 4px solid var(--orange-500);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-contact .step-card:hover {
  transform: translate(2px, -2px);
  box-shadow: var(--shadow-hard);
}

.page-contact .step-card .num {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--orange-500);
}

.page-contact .step-card h3 {
  margin: 8px 0 8px;
  font-size: 18px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--mist-050);
}

.page-contact .step-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--slate-300);
}

/* ---------- 三条通道 ---------- */
.page-contact .channel-grid {
  margin-top: clamp(22px, 4vw, 32px);
  display: grid;
  gap: 18px;
  align-items: start;
}

.page-contact .channel-card {
  padding: var(--contact-pad);
  background: var(--ink-700);
  border: 2px solid var(--line-600);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
  display: grid;
  gap: 12px;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .channel-card__head {
  display: grid;
  gap: 6px;
}

.page-contact .channel-card__tag {
  justify-self: start;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  padding: 3px 8px;
  border: 1px solid var(--line-600);
  border-radius: var(--radius);
  color: var(--slate-300);
}

.page-contact .channel-card h3 {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--mist-050);
}

.page-contact .channel-card__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.9;
  color: var(--teal-400);
  overflow-wrap: anywhere;
}

.page-contact .channel-card__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist-050);
}

.page-contact .channel-card__fit {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--line-600);
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate-300);
  opacity: 0.78;
  transition: opacity var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-contact .channel-card:hover .channel-card__fit,
.page-contact .channel-card:focus-within .channel-card__fit {
  opacity: 1;
  color: var(--orange-500);
}

.page-contact .channel-card--phone {
  background: var(--ink-800);
}

.page-contact .channel-card--letter .channel-card__value {
  color: var(--grayblue-200);
}

/* ---------- 咨询清单 ---------- */
.page-contact .checklist-layout {
  margin-top: clamp(22px, 4vw, 32px);
  display: grid;
  gap: 22px;
  align-items: start;
}

.page-contact .checklist {
  display: grid;
  gap: 18px;
}

.page-contact .checklist__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-contact .check-item {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: start;
  gap: 12px;
  padding: 12px 14px;
  background: var(--ink-800);
  border: 2px solid var(--line-600);
  border-radius: var(--radius);
}

.page-contact .check-item input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin-top: 3px;
  accent-color: var(--teal-400);
  cursor: pointer;
}

.page-contact .check-item label {
  display: grid;
  gap: 4px;
  cursor: pointer;
}

.page-contact .check-item strong {
  font-size: 15px;
  font-weight: 500;
  color: var(--mist-050);
}

.page-contact .check-item span {
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate-300);
}

.page-contact .check-item:has(input:checked) {
  border-color: var(--teal-400);
}

.page-contact .checklist__template {
  padding: var(--contact-pad);
  background: var(--paper-050);
  border: 2px solid var(--line-600);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}

.page-contact .checklist__template .eyebrow {
  color: var(--ink-800);
}

.page-contact .template-text {
  margin: 10px 0 0;
  padding: 14px;
  background: var(--ink-900);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.9;
  color: var(--teal-400);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

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

/* ---------- 时间轴 ---------- */
.page-contact .timeline {
  position: relative;
  list-style: none;
  margin: clamp(28px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-contact .timeline::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 5px;
  width: 4px;
  background: var(--line-600);
  border-radius: 2px;
}

.page-contact .timeline__point {
  position: relative;
  padding-left: 28px;
}

.page-contact .timeline__point::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 14px;
  height: 14px;
  background: var(--ink-900);
  border: 4px solid var(--teal-400);
  border-radius: 50%;
}

.page-contact .timeline__clock {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--orange-500);
}

.page-contact .timeline__point h3 {
  margin: 6px 0 6px;
  font-size: 17px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--mist-050);
}

.page-contact .timeline__point p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--slate-300);
}

.page-contact .timeline__note {
  margin: 22px 0 0;
  padding: 14px 16px;
  border-left: 4px solid var(--orange-500);
  background: var(--ink-800);
  border-radius: var(--radius);
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate-300);
}

/* ---------- 联系方式 ---------- */
.page-contact .reach-grid {
  margin-top: clamp(22px, 4vw, 32px);
  display: grid;
  gap: 16px;
}

.page-contact .reach-card {
  padding: var(--contact-pad);
  background: var(--ink-800);
  border: 2px solid var(--line-600);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  display: grid;
  gap: 10px;
  align-content: start;
}

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

.page-contact .reach-card--paper .eyebrow {
  color: var(--ink-800);
}

.page-contact .reach-card--paper .reach-card__value {
  color: var(--ink-900);
}

.page-contact .reach-card--paper .reach-card__note {
  color: var(--ink-700);
}

.page-contact .reach-card__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(16px, 2.6vw, 20px);
  letter-spacing: 0.02em;
  color: var(--teal-400);
  overflow-wrap: anywhere;
}

.page-contact .reach-card__addr {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.9;
  color: var(--grayblue-200);
  overflow-wrap: anywhere;
}

.page-contact .reach-card__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate-300);
}

.page-contact .reach-actions {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-contact .collect-row {
  margin-top: 20px;
  padding: 16px var(--contact-pad);
  background: var(--ink-700);
  border: 2px solid var(--line-600);
  border-radius: var(--radius);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.page-contact .collect-row__text {
  margin: 0;
  flex: 1 1 240px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate-300);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-contact .step-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-contact .reach-card--wide {
    grid-column: 1 / -1;
  }

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

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

@media (min-width: 900px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: 44px;
  }

  .page-contact .checklist-layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 30px;
  }

  .page-contact .channel-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-contact .channel-card:nth-child(2) {
    margin-top: 26px;
  }

  .page-contact .channel-card:nth-child(3) {
    margin-top: 52px;
  }
}

@media (min-width: 1080px) {
  .page-contact .timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    column-gap: 24px;
  }

  .page-contact .timeline::before {
    top: 6px;
    left: 0;
    right: 0;
    bottom: auto;
    width: auto;
    height: 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .step-card,
  .page-contact .channel-card,
  .page-contact .channel-card__fit {
    transition: none;
  }

  .page-contact .step-card:hover {
    transform: none;
  }
}