.page-contact {
  padding-bottom: 104px;
  overflow-x: hidden;
}

.page-contact .crumbs {
  margin-top: 28px;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding: 44px 0 36px;
  isolation: isolate;
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  top: -60px;
  right: 0;
  left: 0;
  height: 320px;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(620px 240px at 8% 0%, rgba(47, 243, 224, 0.16), transparent 72%),
    radial-gradient(560px 220px at 92% 18%, rgba(122, 59, 255, 0.22), transparent 74%);
}

.page-contact .contact-hero > * {
  position: relative;
  z-index: 1;
}

.page-contact .contact-hero h1 {
  margin: 16px 0 0;
  max-width: 20ch;
}

.page-contact .contact-hero .lede {
  max-width: 62ch;
  margin-top: 22px;
  color: var(--muted);
}

.page-contact .hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.page-contact .hero-meta__item {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-contact .hero-meta__item .dot {
  flex: none;
}

.page-contact .hero-meta__value {
  font-family: var(--mono);
  letter-spacing: 0.06em;
  color: var(--ink);
}

/* ---------- 章节通用 ---------- */
.page-contact .section {
  padding-top: 66px;
}

.page-contact .chapter {
  margin-bottom: 20px;
}

.page-contact .chapter__title {
  margin: 8px 0 0;
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 400;
  letter-spacing: 0.02em;
  line-height: 1.3;
}

.page-contact .section-intro {
  max-width: 58ch;
  margin: 0 0 30px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
}

/* ---------- 01 联络通道 ---------- */
.page-contact .channels {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-contact .channel-stack {
  display: grid;
  gap: 20px;
  align-content: start;
}

.page-contact .channel-card {
  position: relative;
  padding: 26px 24px 22px;
  border-radius: var(--r-md);
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform 0.36s var(--ease), border-color 0.36s var(--ease);
}

.page-contact .channel-card::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: var(--grad-flow);
}

.page-contact .channel-card--hot::after {
  background: var(--grad-heat);
}

.page-contact .channel-card:hover {
  transform: translateY(-3px);
  border-color: rgba(47, 243, 224, 0.5);
}

.page-contact .channel-card--hot:hover {
  border-color: rgba(255, 122, 47, 0.5);
}

.page-contact .channel-card__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}

.page-contact .channel-card__name {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-contact .channel-value {
  display: block;
  font-family: var(--mono);
  font-size: clamp(17px, 2.3vw, 23px);
  letter-spacing: 0.04em;
  line-height: 1.4;
  color: var(--cyan);
  word-break: break-all;
}

.page-contact .channel-card--hot .channel-value {
  color: var(--orange);
  word-break: keep-all;
}

.page-contact .channel-card__desc {
  margin: 14px 0 18px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--muted);
}

.page-contact .channel-card__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.page-contact .channel-card .btn {
  flex: none;
}

.page-contact .channel-visual {
  position: relative;
  margin: 0;
  min-height: 250px;
  aspect-ratio: 4 / 3;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: var(--panel);
  overflow: hidden;
}

.page-contact .channel-visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-width: 100%;
  opacity: 0.92;
}

.page-contact .channel-visual figcaption {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  padding: 34px 20px 16px;
  font-size: 13px;
  line-height: 1.6;
  letter-spacing: 0.03em;
  color: var(--ink);
  background: linear-gradient(180deg, rgba(10, 14, 39, 0) 0%, rgba(10, 14, 39, 0.94) 72%);
}

/* ---------- 02 提交前准备 ---------- */
.page-contact .tabs {
  margin-top: 4px;
}

.page-contact .tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 6px;
  border-radius: 999px;
  background: var(--panel);
  border: 1px solid var(--line);
}

.page-contact .tab {
  flex: 1 1 auto;
  min-width: 120px;
  padding: 12px 18px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 14px;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: color 0.3s var(--ease), background 0.3s var(--ease);
}

.page-contact .tab:hover {
  color: var(--ink);
}

.page-contact .tab[aria-selected="true"] {
  color: var(--bg);
  background: var(--cyan);
  font-weight: 600;
}

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

.page-contact .tabpanel {
  margin-top: 22px;
  padding: 26px 24px;
  border-radius: var(--r-md);
  background: linear-gradient(158deg, rgba(32, 42, 92, 0.92), rgba(22, 28, 63, 0.92));
  border: 1px solid var(--line);
}

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

.page-contact .checklist {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .checklist li {
  position: relative;
  padding-left: 30px;
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--ink);
}

.page-contact .checklist li::before {
  content: "";
  position: absolute;
  top: 9px;
  left: 3px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--cyan);
  transform: rotate(45deg);
}

/* ---------- 03 处理流程 ---------- */
.page-contact .timeline-media {
  position: relative;
  margin: 0 0 36px;
  aspect-ratio: 16 / 9;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: var(--panel);
  overflow: hidden;
}

.page-contact .timeline-media img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  opacity: 0.88;
}

.page-contact .timeline {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .tl-item {
  position: relative;
  padding-left: 46px;
  padding-bottom: 14px;
}

.page-contact .tl-item::before {
  content: "";
  position: absolute;
  top: 28px;
  bottom: -6px;
  left: 15px;
  width: 1px;
  background: linear-gradient(180deg, rgba(47, 243, 224, 0.6), rgba(122, 59, 255, 0.34), rgba(58, 69, 133, 0.3));
}

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

.page-contact .tl-item:last-child::before {
  display: none;
}

.page-contact .tl-node {
  position: absolute;
  top: 16px;
  left: 8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(47, 243, 224, 0.12);
  z-index: 1;
}

.page-contact .tl-step {
  border-radius: var(--r-md);
  background: rgba(22, 28, 63, 0.72);
  border: 1px solid var(--line);
  transition: border-color 0.32s var(--ease), background 0.32s var(--ease);
}

.page-contact .tl-step[open] {
  border-color: rgba(47, 243, 224, 0.42);
  background: rgba(22, 28, 63, 0.95);
}

.page-contact .tl-step__summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  cursor: pointer;
  list-style: none;
}

.page-contact .tl-step__summary::-webkit-details-marker {
  display: none;
}

.page-contact .tl-step__summary::marker {
  content: "";
}

.page-contact .tl-step__summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
  border-radius: var(--r-md);
}

.page-contact .tl-step__idx {
  flex: none;
  min-width: 26px;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-contact .tl-step__label {
  flex: 1 1 auto;
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-contact .tl-step__chev {
  flex: none;
  width: 9px;
  height: 9px;
  margin-right: 4px;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: rotate(45deg) translateY(-2px);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-contact .tl-step[open] .tl-step__chev {
  border-color: var(--cyan);
  transform: rotate(-135deg) translateY(-2px);
}

.page-contact .tl-step__panel {
  padding: 0 22px 20px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.78;
}

.page-contact .tl-step__panel p {
  margin: 0;
}

/* ---------- 04 地址与备案 ---------- */
.page-contact .office-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-contact .office-card {
  padding: 26px 24px;
  border-radius: var(--r-md);
  background: var(--panel);
  border: 1px solid var(--line);
}

.page-contact .office-card__label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-contact .office-card__value {
  display: block;
  margin-top: 14px;
  font-size: 18px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-contact .office-card__value--mono {
  font-family: var(--mono);
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-contact .office-note {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 05 相关入口 ---------- */
.page-contact .quick-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-contact .quick-link {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px;
  border-radius: var(--r-md);
  background: var(--panel);
  border: 1px solid var(--line);
  text-decoration: none;
  color: var(--ink);
  transition: transform 0.34s var(--ease), border-color 0.34s var(--ease), background 0.34s var(--ease);
}

.page-contact .quick-link:hover {
  transform: translateY(-3px);
  border-color: rgba(47, 243, 224, 0.5);
  background: rgba(32, 42, 92, 0.82);
}

.page-contact .quick-link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-contact .quick-link__title {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.page-contact .quick-link__desc {
  font-size: 14px;
  line-height: 1.68;
  color: var(--muted);
}

.page-contact .quick-link__go {
  margin-top: auto;
  padding-top: 8px;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-contact .checklist {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 30px;
  }

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

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

  .page-contact .tabpanel {
    padding: 30px 32px;
  }

  .page-contact .timeline-media {
    aspect-ratio: 8 / 3;
  }
}

@media (min-width: 960px) {
  .page-contact .channels {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
    align-items: stretch;
    gap: 30px;
  }

  .page-contact .channel-visual {
    height: 100%;
    min-height: 420px;
    aspect-ratio: auto;
  }

  .page-contact .section {
    padding-top: 80px;
  }

  .page-contact .contact-hero {
    padding: 56px 0 44px;
  }
}

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

@media (max-width: 479px) {
  .page-contact .tab {
    min-width: 100%;
    text-align: center;
  }

  .page-contact .tl-item {
    padding-left: 34px;
  }

  .page-contact .tl-node {
    left: 2px;
  }

  .page-contact .tl-item::before {
    left: 9px;
  }

  .page-contact .tl-step__panel {
    padding: 0 18px 18px;
  }
}

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

  .page-contact .channel-card:hover,
  .page-contact .quick-link:hover {
    transform: none;
  }
}