.page-contact {
  --contact-panel-bg: rgba(16, 42, 84, .58);
  --contact-accent-soft-bg: rgba(255, 107, 53, .12);
  --contact-line-strong: rgba(255, 107, 53, .5);
}

.page-contact [id] {
  scroll-margin-top: calc(var(--header-h-mobile) + 14px);
}

/* ===== 首屏联络封面 ===== */
.page-contact .contact-hero {
  position: relative;
  padding: calc(var(--header-h-mobile) + 44px) 0 52px;
  overflow: hidden;
  border-bottom: 1px solid var(--c-line);
  background:
    linear-gradient(135deg, rgba(255, 107, 53, .1) 0%, transparent 42%),
    var(--c-bg);
}

.page-contact .contact-hero .grid-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--c-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--c-grid) 1px, transparent 1px);
  background-size: 42px 42px;
}

.page-contact .contact-hero-rail {
  position: absolute;
  top: 26%;
  right: -6%;
  width: 42%;
  height: 2px;
  background: linear-gradient(to left, transparent, rgba(255, 107, 53, .48), rgba(255, 107, 53, .12) 70%, transparent);
  transform: rotate(-16deg);
  pointer-events: none;
  z-index: 0;
}

.page-contact .contact-hero-rail--b {
  top: 38%;
  right: 2%;
  width: 26%;
  opacity: .45;
}

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

.page-contact .contact-hero .breadcrumbs {
  margin-bottom: 28px;
  font-size: .85rem;
}

.page-contact .contact-hero .breadcrumbs a {
  color: var(--c-muted);
  text-decoration: none;
  transition: color .2s var(--ease);
}

.page-contact .contact-hero .breadcrumbs a:hover {
  color: var(--c-accent);
}

.page-contact .contact-hero .breadcrumbs [aria-current="page"] {
  color: var(--c-accent-soft);
}

.page-contact .breadcrumbs-sep {
  margin: 0 8px;
  color: var(--c-muted);
}

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

.page-contact .contact-hero-copy h1 {
  margin: 16px 0;
  font-size: clamp(2.1rem, 8vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -.02em;
}

.page-contact .contact-hero-lead {
  max-width: 58ch;
  margin: 0;
  color: var(--c-muted);
  font-size: 1rem;
  line-height: 1.75;
}

.page-contact .contact-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-contact .contact-hero-index {
  padding: 22px 20px;
  background: var(--contact-panel-bg);
  border: 1px solid var(--c-line);
}

.page-contact .contact-hero-index .map-legend {
  margin-bottom: 6px;
}

.page-contact .contact-index-list,
.page-contact .map-coordinate-list {
  margin: 14px 0 0;
  padding: 0;
}

.page-contact .contact-index-row,
.page-contact .map-coordinate-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--c-line);
}

.page-contact .contact-index-row:last-child,
.page-contact .map-coordinate-row:last-child {
  border-bottom: 0;
}

.page-contact .contact-index-row dt,
.page-contact .map-coordinate-row dt {
  color: var(--c-muted);
  font-size: .8rem;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.page-contact .contact-index-row dd,
.page-contact .map-coordinate-row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .88rem;
  color: var(--c-white);
  text-align: right;
}

.page-contact .contact-page-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 18px;
}

.page-contact .contact-page-nav a {
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--c-silver);
  text-decoration: none;
  border: 1px solid var(--c-line);
  background: rgba(255, 255, 255, .02);
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-contact .contact-page-nav a:hover {
  color: var(--c-accent);
  border-color: var(--contact-line-strong);
  background: var(--contact-accent-soft-bg);
}

.page-contact .mono {
  font-family: var(--font-mono);
}

/* ===== 01 联系渠道 ===== */
.page-contact .contact-channels {
  padding: 58px 0 64px;
}

.page-contact .contact-channels h2,
.page-contact .contact-map-section h2,
.page-contact .contact-topics h2 {
  margin: 12px 0 10px;
  font-size: clamp(1.5rem, 3.6vw, 2.2rem);
  line-height: 1.2;
}

.page-contact .channels-intro,
.page-contact .map-intro {
  max-width: 64ch;
  margin: 0;
  color: var(--c-muted);
}

.page-contact .channels-grid {
  margin-top: 30px;
}

.page-contact .channel-card {
  position: relative;
  padding: 26px 22px;
  background: var(--c-bg-card);
  border: 1px solid var(--c-line);
  transition: border-color .25s var(--ease), background-color .25s var(--ease), transform .25s var(--ease);
}

.page-contact .channel-card:hover {
  border-color: var(--contact-line-strong);
  background: #143562;
  transform: translateY(-3px);
}

.page-contact .channel-card-icon {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  margin-bottom: 18px;
  color: var(--c-accent);
  background: var(--contact-accent-soft-bg);
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
}

.page-contact .channel-card-icon svg {
  width: 24px;
  height: 24px;
}

.page-contact .channel-card .tag {
  margin-bottom: 10px;
}

.page-contact .channel-card h3 {
  margin: 4px 0 8px;
  font-size: 1.18rem;
}

.page-contact .channel-card p {
  margin: 0;
  color: var(--c-muted);
  font-size: .92rem;
  line-height: 1.65;
}

.page-contact .channel-email-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.page-contact .channel-value {
  font-family: var(--font-mono);
  font-size: .95rem;
  font-weight: 700;
  word-break: break-all;
}

.page-contact .channel-value--email,
.page-contact .channel-value--phone {
  padding-bottom: 2px;
  color: var(--c-white);
  text-decoration: none;
  border-bottom: 1px dashed var(--c-silver);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-contact .channel-value--email {
  color: var(--c-accent-soft);
  border-color: rgba(255, 140, 98, .45);
}

.page-contact .channel-value--email:hover,
.page-contact .channel-value--phone:hover {
  color: var(--c-accent);
  border-color: var(--c-accent);
}

.page-contact .channel-value--address {
  display: block;
  margin-bottom: 12px;
  color: var(--c-white);
  line-height: 1.5;
}

.page-contact .contact-copy-btn {
  flex: 0 0 auto;
  padding: 2px 9px 3px;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .06em;
  color: var(--c-accent);
  border: 1px solid var(--c-accent);
  background: transparent;
  white-space: nowrap;
  opacity: 0;
  transform: translateX(-8px);
  transition: opacity .22s var(--ease), transform .22s var(--ease), background-color .2s var(--ease);
  pointer-events: none;
  clip-path: polygon(4px 0, 100% 0, calc(100% - 4px) 100%, 0 100%);
}

.page-contact .channel-email-row:hover .contact-copy-btn,
.page-contact .channel-email-row:focus-within .contact-copy-btn {
  opacity: 1;
  transform: translateX(0);
}

.page-contact .channels-visual {
  position: relative;
  display: grid;
  gap: 22px;
  margin-top: 44px;
  padding: 22px;
  border: 1px solid var(--c-line);
  background: var(--c-bg-deep);
}

.page-contact .channels-visual::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 84px;
  height: 3px;
  background: var(--c-accent);
}

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

.page-contact .channels-visual-copy .section-label {
  margin-bottom: 10px;
}

.page-contact .channels-visual-copy p {
  color: var(--c-muted);
  line-height: 1.7;
}

.page-contact .channels-visual-copy .btn {
  margin-top: 8px;
}

/* ===== 02 邮件响应说明 ===== */
.page-contact .contact-note {
  position: relative;
  padding: 56px 0;
  overflow: hidden;
}

.page-contact .contact-note .container {
  position: relative;
  z-index: 1;
}

.page-contact .contact-note .note-grid {
  display: grid;
  gap: 26px;
}

.page-contact .note-heading h2 {
  margin: 12px 0 8px;
  font-size: clamp(1.5rem, 3.6vw, 2rem);
}

.page-contact .note-sub {
  margin: 0;
  color: var(--c-muted);
}

.page-contact .note-quote {
  margin: 0 0 18px;
  padding: 18px 22px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.04rem;
  line-height: 1.6;
  color: var(--c-white);
  border-left: 4px solid var(--c-accent);
  background: rgba(255, 107, 53, .09);
}

.page-contact .note-body > p:last-child {
  color: var(--c-muted);
  line-height: 1.75;
}

/* ===== 03 地图导航 ===== */
.page-contact .contact-map-section {
  padding: 60px 0 64px;
}

.page-contact .map-layout {
  display: grid;
  gap: 26px;
  margin-top: 28px;
}

.page-contact .map-viewport {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--c-line);
  background: var(--c-bg-deep);
}

.page-contact .map-image {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  transition: filter .35s var(--ease), transform .6s var(--ease);
}

.page-contact .map-viewport:hover .map-image {
  filter: brightness(1.1) contrast(1.02);
  transform: scale(1.015);
}

.page-contact .map-magnifier {
  position: absolute;
  right: 16px;
  bottom: 16px;
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  color: var(--c-white);
  background: rgba(255, 107, 53, .92);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity .25s var(--ease), transform .25s var(--ease);
  pointer-events: none;
}

.page-contact .map-viewport:hover .map-magnifier {
  opacity: 1;
  transform: translateY(0);
}

.page-contact .map-magnifier svg {
  width: 22px;
  height: 22px;
}

.page-contact .map-side-panel {
  padding: 24px 22px;
  background: var(--c-bg-card);
  border: 1px solid var(--c-line);
  align-self: start;
}

.page-contact .map-side-panel .route-divider {
  margin: 18px 0;
}

.page-contact .map-side-panel p {
  color: var(--c-muted);
  font-size: .92rem;
  line-height: 1.7;
}

.page-contact .map-side-panel .btn {
  margin-top: 6px;
}

/* ===== 04 常见沟通主题 ===== */
.page-contact .contact-topics {
  position: relative;
  padding: 60px 0 68px;
  overflow: hidden;
}

.page-contact .contact-topics .container {
  position: relative;
  z-index: 1;
}

.page-contact .topic-list {
  margin-top: 28px;
  border-top: 1px solid var(--c-line);
}

.page-contact .topic-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px 20px;
  padding: 22px 0;
  border-bottom: 1px solid var(--c-line);
}

.page-contact .topic-row .chapter-index {
  font-family: var(--font-mono);
  font-size: 1.9rem;
  font-weight: 700;
  line-height: 1;
  color: var(--c-accent);
}

.page-contact .topic-row h3 {
  margin: 0;
  font-size: 1.08rem;
}

.page-contact .topic-row p {
  margin: 8px 0 0;
  color: var(--c-muted);
  font-size: .93rem;
  line-height: 1.65;
}

.page-contact .topic-row .btn {
  justify-self: start;
}

/* ===== 交互焦点与桌面布局 ===== */
.page-contact .channel-value--email:focus-visible,
.page-contact .channel-value--phone:focus-visible,
.page-contact .contact-page-nav a:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 3px;
}

@media (min-width: 768px) {
  .page-contact [id] {
    scroll-margin-top: calc(var(--header-h) + 14px);
  }

  .page-contact .contact-hero {
    padding: calc(var(--header-h) + 62px) 0 76px;
  }

  .page-contact .contact-hero-grid {
    grid-template-columns: 1.15fr .85fr;
    gap: 44px;
  }

  .page-contact .contact-hero-copy h1 {
    font-size: clamp(2.4rem, 4vw, 3.6rem);
  }

  .page-contact .channels-visual {
    grid-template-columns: 300px 1fr;
    gap: 30px;
    padding: 26px;
    align-items: center;
  }

  .page-contact .contact-note {
    padding: 68px 0;
  }

  .page-contact .note-grid {
    grid-template-columns: .85fr 1.15fr;
    gap: 52px;
    align-items: start;
  }

  .page-contact .map-layout {
    grid-template-columns: 1.5fr 1fr;
    gap: 30px;
    align-items: start;
  }

  .page-contact .topic-row {
    grid-template-columns: 72px 1fr auto;
    gap: 0 24px;
    align-items: center;
  }

  .page-contact .topic-row .btn {
    justify-self: end;
  }

  .page-contact .topic-row p {
    margin-top: 4px;
  }
}