.page-contact {
  --contact-grid-size: 24px;
  --contact-gold-line: var(--line-pale);
  position: relative;
  background: var(--parchment);
}

/* ============ 顶部标题区 ============ */
.page-contact .contact-hero {
  padding: 24px 20px 36px;
  max-width: var(--page-w);
  margin: 0 auto;
}

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

.page-contact .contact-heading {
  position: relative;
  padding-left: 24px;
}

.page-contact .contact-heading::before {
  content: '';
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 4px;
  background: linear-gradient(180deg, var(--cinnabar) 0%, var(--gold) 72%);
  border-radius: 2px;
}

.page-contact .contact-heading h1 {
  font-family: var(--font-serif);
  font-size: 30px;
  font-weight: 700;
  line-height: 1.3;
  margin: 16px 0 14px;
  color: var(--ink);
  letter-spacing: .01em;
}

.page-contact .contact-heading .page-intro {
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-muted);
  max-width: 720px;
  margin: 0;
}

/* ============ 主网格：左联系方式 / 右写信 ============ */
.page-contact .contact-main-grid {
  display: grid;
  gap: 28px;
  padding: 0 20px 48px;
  max-width: var(--page-w);
  margin: 0 auto;
}

/* ============ 左·联系通道卡片 ============ */
.page-contact .contact-channels {
  position: relative;
  background: var(--white);
  border: 1px solid var(--contact-gold-line);
  border-top: 3px solid var(--gold);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.page-contact .contact-channels::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(26, 26, 26, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26, 26, 26, .035) 1px, transparent 1px);
  background-size: var(--contact-grid-size) var(--contact-grid-size);
  pointer-events: none;
  z-index: 0;
}

.page-contact .contact-channels-head {
  position: relative;
  z-index: 1;
  padding: 26px 24px 0;
}

.page-contact .contact-channels-head h2,
.page-contact .contact-compose h2,
.page-contact .contact-guidance h2,
.page-contact .contact-response h2,
.page-contact .contact-common-nav h2 {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 6px;
  letter-spacing: .02em;
}

.page-contact .contact-channels-head .section-caption,
.page-contact .contact-compose .section-caption,
.page-contact .contact-common-nav .section-caption {
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--ink-muted);
  line-height: 1.6;
  margin: 0 0 16px;
}

.page-contact .contact-channel-visual {
  position: relative;
  z-index: 1;
  margin: 16px 24px 0;
}

.page-contact .contact-channel-visual img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  max-height: 200px;
  object-fit: cover;
}

.page-contact .contact-channel-list {
  position: relative;
  z-index: 1;
  padding: 18px 24px 12px;
  display: grid;
  gap: 2px;
}

.page-contact .contact-item {
  display: grid;
  grid-template-columns: 84px 1fr;
  gap: 12px;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid var(--line-ink);
}

.page-contact .contact-item:last-child {
  border-bottom: none;
}

.page-contact .contact-item-label {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: .08em;
}

.page-contact .contact-item-value {
  font-family: var(--font-sans);
  font-size: 16px;
  color: var(--ink);
  text-decoration: none;
  word-break: break-all;
  line-height: 1.5;
}

.page-contact a.contact-item-value {
  text-decoration: underline;
  text-decoration-color: transparent;
  transition: color var(--transition-base), text-decoration-color var(--transition-base);
}

.page-contact a.contact-item-value:hover {
  color: var(--celadon);
  text-decoration-color: var(--celadon);
}

.page-contact .contact-channel-note {
  position: relative;
  z-index: 1;
  margin: 0 24px;
  padding: 16px 0 20px;
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.65;
  color: var(--ink-muted);
  border-top: 1px solid var(--contact-gold-line);
}

/* ============ 右·写信操作区 ============ */
.page-contact .contact-compose {
  position: relative;
  background: var(--mist);
  border: 1px solid var(--contact-gold-line);
  border-radius: var(--radius);
  padding: 26px 24px 22px;
  box-shadow: var(--shadow-card);
}

.page-contact .contact-compose::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 128px;
  height: 3px;
  background: var(--gold);
  border-radius: 0 0 3px 3px;
}

.page-contact .contact-compose-panel {
  display: grid;
  gap: 14px;
}

.page-contact .contact-compose-item {
  background: var(--white);
  border: 1px solid var(--line-ink);
  border-left: 3px solid var(--celadon);
  border-radius: var(--radius-sm);
  padding: 18px;
  display: grid;
  gap: 8px;
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

.page-contact .contact-compose-item:hover {
  border-left-color: var(--gold);
  border-color: var(--pale-gold);
  box-shadow: var(--shadow-lift);
}

.page-contact .contact-compose-label {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-contact .compose-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--brown);
  color: var(--pale-gold);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
}

.page-contact .contact-compose-item p {
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--ink-muted);
  line-height: 1.6;
  margin: 0;
}

.page-contact .contact-compose-item .btn {
  justify-self: start;
  margin-top: 6px;
}

.page-contact .contact-compose-hint {
  margin-top: 18px;
  padding: 14px 16px;
  background: var(--parchment);
  border-left: 3px solid var(--gold);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.page-contact .contact-compose-hint {
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.65;
  color: var(--ink-muted);
  margin: 18px 0 0;
}

/* ============ 来信须知 ============ */
.page-contact .contact-guidance {
  position: relative;
  background: var(--brown);
  padding: 44px 20px;
}

.page-contact .contact-guidance::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(201, 165, 74, .08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201, 165, 74, .08) 1px, transparent 1px);
  background-size: 30px 30px;
  pointer-events: none;
}

.page-contact .contact-guidance-grid {
  position: relative;
  max-width: var(--page-w);
  margin: 0 auto;
  display: grid;
  gap: 28px;
}

.page-contact .contact-guidance-intro h2 {
  color: var(--pale-gold);
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  margin: 0 0 10px;
}

.page-contact .contact-guidance-intro p {
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, .72);
  margin: 0;
}

.page-contact .contact-guidance-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  counter-reset: guidance;
}

.page-contact .contact-guidance-item {
  position: relative;
  counter-increment: guidance;
  padding: 12px 0 12px 52px;
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.6;
  color: var(--white);
  border-bottom: 1px solid rgba(255, 255, 255, .1);
}

.page-contact .contact-guidance-item:last-child {
  border-bottom: none;
}

.page-contact .contact-guidance-item::before {
  content: counter(guidance, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--gold);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--gold);
  background: rgba(201, 165, 74, .08);
}

/* ============ 回复预期 ============ */
.page-contact .contact-response {
  padding: 44px 20px;
  background: var(--mist);
  border-top: 1px solid var(--line-pale);
  border-bottom: 1px solid var(--line-pale);
}

.page-contact .contact-response-grid {
  max-width: var(--page-w);
  margin: 0 auto;
  display: grid;
  gap: 28px;
  align-items: center;
}

.page-contact .contact-response-content h2 {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 12px;
}

.page-contact .contact-response-lead {
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 600;
  color: var(--cinnabar);
  margin: 0 0 10px;
}

.page-contact .contact-response-content p {
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-muted);
  margin: 0 0 10px;
}

.page-contact .contact-response-content p:last-child {
  margin-bottom: 0;
}

.page-contact .contact-response-content a {
  color: var(--celadon);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base);
}

.page-contact .contact-response-content a:hover {
  border-color: var(--celadon);
}

.page-contact .contact-response-visual img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

/* ============ 常见导航 ============ */
.page-contact .contact-common-nav {
  padding: 44px 20px 56px;
}

.page-contact .contact-common-nav .section-heading {
  max-width: var(--page-w);
  margin: 0 auto 24px;
}

.page-contact .contact-common-nav h2 {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 6px;
}

.page-contact .contact-common-nav .section-caption {
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--ink-muted);
  margin: 0;
}

.page-contact .contact-nav-grid {
  display: grid;
  gap: 18px;
  max-width: var(--page-w);
  margin: 0 auto;
}

.page-contact .contact-nav-card {
  display: block;
  padding: 24px;
  text-decoration: none;
  color: inherit;
}

.page-contact .contact-nav-card h3 {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  margin: 14px 0 8px;
}

.page-contact .contact-nav-card p {
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink-muted);
  margin: 0 0 14px;
}

.page-contact .contact-nav-more {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  color: var(--cinnabar);
  letter-spacing: .04em;
  transition: color var(--transition-base);
}

.page-contact .contact-nav-card:hover .contact-nav-more {
  color: var(--gold);
}

/* ============ 桌面端 ≥860px ============ */
@media (min-width: 860px) {
  .page-contact .contact-hero {
    padding: 40px 32px 52px;
  }

  .page-contact .contact-heading h1 {
    font-size: 40px;
  }

  .page-contact .contact-heading .page-intro {
    font-size: 17px;
  }

  .page-contact .contact-main-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 36px;
    padding: 0 32px 64px;
  }

  .page-contact .contact-guidance {
    padding: 56px 32px;
  }

  .page-contact .contact-guidance-grid {
    grid-template-columns: 300px 1fr;
    gap: 56px;
  }

  .page-contact .contact-guidance-intro h2 {
    font-size: 24px;
  }

  .page-contact .contact-guidance-item {
    font-size: 15px;
    padding-top: 14px;
    padding-bottom: 14px;
  }

  .page-contact .contact-response {
    padding: 56px 32px;
  }

  .page-contact .contact-response-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
    gap: 48px;
  }

  .page-contact .contact-response-content h2 {
    font-size: 24px;
  }

  .page-contact .contact-response-content p {
    font-size: 16px;
  }

  .page-contact .contact-common-nav {
    padding: 56px 32px 64px;
  }

  .page-contact .contact-nav-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .page-contact .contact-compose-item {
    padding: 20px;
  }

  .page-contact .contact-compose-item .btn {
    margin-top: 2px;
  }
}

/* ============ 大屏 ≥1200px ============ */
@media (min-width: 1200px) {
  .page-contact .contact-hero {
    padding-top: 48px;
    padding-bottom: 60px;
  }

  .page-contact .contact-heading h1 {
    font-size: 44px;
  }

  .page-contact .contact-main-grid {
    gap: 48px;
  }

  .page-contact .contact-channels-head,
  .page-contact .contact-channel-list {
    padding-left: 32px;
    padding-right: 32px;
  }

  .page-contact .contact-channel-visual {
    margin-left: 32px;
    margin-right: 32px;
  }

  .page-contact .contact-channel-note {
    margin-left: 32px;
    margin-right: 32px;
  }

  .page-contact .contact-compose {
    padding: 30px 28px 26px;
  }
}