.page-contact {
  --pc-rail: 178px;
  --pc-gap: clamp(1.25rem, 3.2vw, 2.75rem);
  --pc-block: clamp(2.5rem, 6vw, 4.5rem);
  position: relative;
  padding-block: clamp(1.5rem, 4vw, 2.5rem) clamp(3rem, 8vw, 6rem);
  color: var(--ink);
}

.page-contact::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 68vh;
  background:
    radial-gradient(circle at 84% 6%, rgba(34, 230, 216, 0.15), transparent 58%),
    radial-gradient(circle at 8% 0%, rgba(255, 92, 43, 0.11), transparent 52%);
  pointer-events: none;
  z-index: 0;
}

/* ---------- 骨架：左索引 + 右内容 ---------- */

.page-contact .contact-shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--pc-gap);
  align-items: start;
}

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

.page-contact .contact-rail .rail-title {
  margin: 0 0 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-contact .contact-rail .rail-list {
  display: flex;
  gap: 0.4rem;
  margin: 0;
  padding: 0 0 0.35rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-contact .contact-rail .rail-list::-webkit-scrollbar {
  display: none;
}

.page-contact .contact-rail .rail-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  white-space: nowrap;
  padding: 0.42rem 0.82rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.82rem;
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-contact .contact-rail .rail-link:hover,
.page-contact .contact-rail .rail-link:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
  background-color: rgba(34, 230, 216, 0.07);
}

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

.page-contact .content > .section + .section {
  margin-top: var(--pc-block);
}

.page-contact .section-head {
  display: grid;
  gap: 0.55rem;
  margin-bottom: clamp(1rem, 2.5vw, 1.6rem);
}

.page-contact .section-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.45rem, 3.4vw, 2.2rem);
  line-height: 1.14;
  letter-spacing: -0.015em;
}

.page-contact .section-lede {
  margin: 0;
  max-width: 40em;
  color: var(--muted);
  line-height: 1.75;
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  padding-top: clamp(0.5rem, 2vw, 1rem);
}

.page-contact .contact-title {
  margin: 0.5rem 0 0.9rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 6.4vw, 3.9rem);
  line-height: 1.04;
  letter-spacing: -0.022em;
}

.page-contact .contact-title em {
  font-style: normal;
  color: var(--cyan);
}

/* ---------- 联系渠道 ---------- */

.page-contact .contact-visual {
  margin: 0 0 clamp(1.1rem, 2.6vw, 1.8rem);
  border-radius: var(--radius-soft);
  border: 1px solid var(--line);
  background: linear-gradient(140deg, rgba(34, 230, 216, 0.08), rgba(255, 92, 43, 0.06) 70%, transparent);
}

.page-contact .contact-visual img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-contact .channel-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(0.85rem, 2vw, 1.15rem);
}

.page-contact .channel-card {
  position: relative;
  padding: clamp(1.05rem, 2.4vw, 1.6rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-soft);
  background: linear-gradient(165deg, rgba(34, 230, 216, 0.06), transparent 58%), var(--bg-2);
  transition: transform 0.24s var(--ease), border-color 0.24s var(--ease), box-shadow 0.24s var(--ease);
}

.page-contact .channel-card::before {
  content: "";
  display: block;
  width: 46px;
  height: 3px;
  margin-bottom: 0.95rem;
  border-radius: 2px;
  background: var(--cyan);
}

.page-contact .channel-card--warm::before {
  background: var(--orange);
}

.page-contact .channel-card--lime::before {
  background: var(--lime);
}

.page-contact .channel-card:hover,
.page-contact .channel-card:focus-within {
  transform: translateY(-4px);
  border-color: var(--orange);
  box-shadow: 0 18px 38px -24px rgba(255, 92, 43, 0.55);
}

.page-contact .channel-card .card-meta {
  margin: 0 0 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-contact .channel-card .card-title {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.15rem, 2.4vw, 1.4rem);
  letter-spacing: -0.01em;
}

.page-contact .channel-card .card-text {
  margin: 0.85rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.75;
}

/* 复制字段 */

.page-contact .copy-field {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(6, 10, 22, 0.6);
}

.page-contact .copy-value {
  flex: 1 1 11ch;
  min-width: 0;
  font-size: 0.86rem;
  line-height: 1.5;
  color: var(--ink);
  word-break: break-all;
}

.page-contact .copy-feedback {
  flex: 0 0 auto;
  font-size: 0.72rem;
  color: var(--lime);
  min-height: 1em;
}

.page-contact .copy-feedback:empty {
  display: none;
}

/* ---------- 问题分流 ---------- */

.page-contact .route-tabs {
  margin-top: 0.4rem;
}

.page-contact .tab-bar {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
  scrollbar-width: none;
}

.page-contact .tab-bar::-webkit-scrollbar {
  display: none;
}

.page-contact .route-tab {
  flex: 0 0 auto;
  padding: 0.55rem 1rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.86rem;
  cursor: pointer;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-contact .route-tab:hover,
.page-contact .route-tab:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
}

.page-contact .route-tab[aria-selected="true"],
.page-contact .route-tab.is-active {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #04131a;
}

.page-contact .tab-panels {
  display: grid;
  gap: 0.85rem;
  margin-top: 0.85rem;
}

.page-contact .route-panel {
  position: relative;
  padding: clamp(1.05rem, 2.4vw, 1.6rem) clamp(1.05rem, 2.4vw, 1.6rem) clamp(1.05rem, 2.4vw, 1.6rem) clamp(1.2rem, 2.8vw, 1.9rem);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  border-radius: 6px 16px 16px 6px;
  background: var(--bg-2);
}

.page-contact .route-num {
  margin: 0 0 0.4rem;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-contact .route-title {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.05rem, 2.2vw, 1.28rem);
  letter-spacing: -0.01em;
}

.page-contact .route-text {
  margin: 0;
  max-width: 40em;
  color: var(--muted);
  font-size: 0.93rem;
  line-height: 1.75;
}

.page-contact .route-note {
  margin: 0.85rem 0 0;
  padding-top: 0.7rem;
  border-top: 1px dashed var(--line);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

/* ---------- 回复时段 ---------- */

.page-contact .contact-timeline {
  margin: 0;
  padding: 0 0 0 1.1rem;
  list-style: none;
  border-left: 1px solid var(--line);
}

.page-contact .contact-timeline .timeline-item {
  position: relative;
  padding: 0 0 1.45rem 0.9rem;
}

.page-contact .contact-timeline .timeline-item:last-child {
  padding-bottom: 0;
}

.page-contact .contact-timeline .timeline-item::before {
  content: "";
  position: absolute;
  left: -1.42rem;
  top: 0.42rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--line);
  box-shadow: 0 0 0 4px rgba(6, 10, 22, 1);
}

.page-contact .contact-timeline .timeline-item:nth-child(1)::before {
  background: var(--cyan);
}

.page-contact .contact-timeline .timeline-item:nth-child(2)::before {
  background: var(--blue-mid);
}

.page-contact .contact-timeline .timeline-item:nth-child(3)::before {
  background: var(--lime);
}

.page-contact .contact-timeline .timeline-item:nth-child(4)::before {
  background: var(--orange);
}

.page-contact .timeline-time {
  margin: 0 0 0.35rem;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-contact .timeline-title {
  margin: 0 0 0.35rem;
  font-size: 1.02rem;
  font-weight: 600;
}

.page-contact .timeline-text {
  margin: 0;
  max-width: 40em;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.75;
}

/* ---------- 提交准备清单 ---------- */

.page-contact .prep-list {
  display: grid;
  gap: 0.7rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .prep-list > li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.95rem;
  align-items: start;
  padding: 0.95rem 1.05rem;
  border-left: 2px solid var(--cyan);
  border-radius: 4px 14px 14px 4px;
  background: rgba(34, 230, 216, 0.05);
}

.page-contact .prep-idx {
  padding-top: 0.12rem;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-contact .prep-list h3 {
  margin: 0 0 0.28rem;
  font-size: 1rem;
  font-weight: 600;
}

.page-contact .prep-list p {
  margin: 0;
  color: var(--muted);
  font-size: 0.91rem;
  line-height: 1.72;
}

/* ---------- 自助跳转 ---------- */

.page-contact .quick-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.85rem;
}

.page-contact .quick-card {
  display: block;
  padding: 1.05rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--bg-2);
  color: inherit;
  text-decoration: none;
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-contact .quick-card:hover,
.page-contact .quick-card:focus-visible {
  transform: translateY(-4px);
  border-color: var(--cyan);
  background: linear-gradient(160deg, rgba(34, 230, 216, 0.08), transparent 60%), var(--bg-2);
}

.page-contact .quick-card .card-meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-contact .quick-card .card-title {
  margin: 0.42rem 0 0.45rem;
  font-size: 1.02rem;
  font-weight: 600;
  line-height: 1.4;
}

.page-contact .quick-card .card-text {
  margin: 0;
  color: var(--muted);
  font-size: 0.89rem;
  line-height: 1.7;
}

/* ---------- 底部通栏与收尾 ---------- */

.page-contact .contact-band {
  margin: var(--pc-block) 0 0;
  border-radius: var(--radius-soft);
  border: 1px solid var(--line);
}

.page-contact .contact-band img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-contact .contact-tail {
  margin-top: clamp(1.6rem, 4vw, 2.6rem);
}

.page-contact .tail-panel {
  padding: clamp(1.3rem, 3.4vw, 2.4rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-soft);
  background:
    radial-gradient(circle at 92% 10%, rgba(255, 92, 43, 0.16), transparent 55%),
    linear-gradient(150deg, rgba(34, 230, 216, 0.09), transparent 62%),
    var(--bg-2);
}

.page-contact .tail-title {
  margin: 0 0 0.7rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.3rem, 3.2vw, 2rem);
  letter-spacing: -0.015em;
}

.page-contact .tail-text {
  margin: 0 0 1.15rem;
  max-width: 40em;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.75;
}

.page-contact .tail-copy {
  max-width: 30rem;
}

.page-contact .tail-legal {
  margin: 1rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.73rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ---------- 平板 ---------- */

@media (min-width: 640px) {
  .page-contact .channel-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .channel-grid > .channel-card:last-child {
    grid-column: 1 / -1;
  }

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

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

/* ---------- 桌面 ---------- */

@media (min-width: 960px) {
  .page-contact .contact-shell {
    grid-template-columns: var(--pc-rail) minmax(0, 1fr);
    gap: var(--pc-gap);
  }

  .page-contact .contact-rail {
    position: sticky;
    top: 96px;
  }

  .page-contact .contact-rail .rail-list {
    flex-direction: column;
    gap: 0.3rem;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-contact .contact-rail .rail-link {
    justify-content: flex-start;
    border-radius: 10px;
    padding: 0.5rem 0.75rem;
  }

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

  .page-contact .channel-grid > .channel-card:last-child {
    grid-column: auto;
  }

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

/* ---------- 动效降级 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .quick-card,
  .page-contact .contact-rail .rail-link,
  .page-contact .route-tab {
    transition: none;
  }

  .page-contact .channel-card:hover,
  .page-contact .channel-card:focus-within,
  .page-contact .quick-card:hover,
  .page-contact .quick-card:focus-visible {
    transform: none;
  }
}