.page-contact {
  --contact-bg-blend: rgba(13, 13, 13, 0.75);
  --contact-card-border-glow: rgba(255, 215, 0, 0.2);
  --contact-grid-color: rgba(255, 215, 0, 0.06);
  --contact-accent-soft: rgba(0, 255, 255, 0.08);
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
  padding: calc(var(--header-height, 64px) + 1rem) 1rem 3rem;
  background: var(--color-dark-bg, #0D0D0D);
  overflow: hidden;
}

/* ── 背景层 ── */
.contact-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.contact-bg-img {
  position: absolute;
  inset: -5% -5% -5% -5%;
  width: 110%;
  height: 110%;
  object-fit: cover;
  opacity: 0.3;
  filter: grayscale(0.8) brightness(0.5) saturate(0.4);
  animation: contact-bg-drift 16s ease-in-out infinite alternate;
  will-change: transform;
}
.contact-grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--contact-grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--contact-grid-color) 1px, transparent 1px);
  background-size: 48px 48px;
  animation: contact-grid-pulse 8s ease-in-out infinite alternate;
}
.page-contact:hover .contact-bg-img {
  animation-duration: 8s;
}
.page-contact:hover .contact-grid-overlay {
  animation-duration: 4s;
  background-color: var(--contact-accent-soft);
}

@keyframes contact-bg-drift {
  0%   { transform: translate(0, 0) scale(1); }
  50%  { transform: translate(-1.2%, 0.8%) scale(1.04); }
  100% { transform: translate(0.6%, -0.4%) scale(1.02); }
}
@keyframes contact-grid-pulse {
  0%   { opacity: 0.5; background-size: 48px 48px; }
  100% { opacity: 1;   background-size: 52px 52px; }
}

/* ── 容器 ── */
.contact-container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--container-max, 1280px);
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* ── 面包屑 ── */
.contact-breadcrumb {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--fs-small, 0.875rem);
  color: var(--color-text-secondary, #B0B0B0);
  margin-bottom: var(--spacing-lg, 2rem);
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-border, #2D2D44);
}
.contact-breadcrumb a {
  color: var(--color-text-secondary, #B0B0B0);
  text-decoration: none;
  transition: color var(--transition-fast, 0.2s ease);
}
.contact-breadcrumb a:hover,
.contact-breadcrumb a:focus-visible {
  color: var(--color-secondary, #FFD700);
}
.contact-breadcrumb-sep {
  color: var(--color-border, #2D2D44);
  font-weight: 300;
}
.contact-breadcrumb [aria-current="page"] {
  color: var(--color-text-primary, #FFFFFF);
  font-weight: var(--fw-bold, 700);
}

/* ── 标题 ── */
.contact-title {
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: var(--fw-heading, 800);
  font-size: clamp(2.2rem, 6vw, 4.2rem);
  line-height: var(--lh-heading, 1.1);
  letter-spacing: var(--ls-heading, -0.02em);
  color: var(--color-text-primary, #FFFFFF);
  text-align: center;
  margin: 0 0 0.25rem;
}
.contact-subtitle {
  font-family: var(--font-body, 'Inter', sans-serif);
  font-weight: var(--fw-body, 300);
  font-size: clamp(1rem, 2vw, 1.3rem);
  color: var(--color-text-secondary, #B0B0B0);
  text-align: center;
  margin: 0 0 var(--spacing-2xl, 5rem);
  letter-spacing: 0.06em;
}

/* ── 通用章节 ── */
.contact-section {
  width: 100%;
  margin-bottom: var(--spacing-2xl, 5rem);
}
.contact-section-heading {
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: var(--fw-heading, 800);
  font-size: clamp(1.2rem, 2.8vw, 1.8rem);
  line-height: var(--lh-heading, 1.1);
  letter-spacing: var(--ls-heading, -0.02em);
  color: var(--color-secondary, #FFD700);
  margin: 0 0 var(--spacing-lg, 2rem);
  position: relative;
  display: inline-block;
}
.contact-section-heading::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 60%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-secondary, #FFD700), transparent);
}

/* ── 联系方式卡片 ── */
.contact-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg, 2rem);
}
.contact-card {
  background: var(--color-card-bg, #1A1A2E);
  border: 1px solid var(--color-border, #2D2D44);
  border-radius: var(--radius-md, 8px);
  padding: var(--spacing-xl, 3rem) var(--spacing-lg, 2rem);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  transition: border-color var(--transition-base, 0.35s ease),
              box-shadow var(--transition-base, 0.35s ease),
              transform var(--transition-base, 0.35s ease);
  will-change: transform;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
}
.contact-card:hover,
.contact-card:focus-within {
  border-color: var(--color-secondary, #FFD700);
  box-shadow: var(--shadow-glow, 0 0 20px rgba(255,215,0,0.15));
  transform: translateY(-3px);
}
.contact-card-icon {
  color: var(--color-secondary, #FFD700);
  margin-bottom: var(--spacing-md, 1rem);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 215, 0, 0.08);
  border-radius: var(--radius-sm, 4px);
  padding: 6px;
  transition: background var(--transition-fast, 0.2s ease);
}
.contact-card:hover .contact-card-icon {
  background: rgba(255, 215, 0, 0.16);
}
.contact-card-label {
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: var(--fw-bold, 700);
  font-size: 0.85rem;
  color: var(--color-text-secondary, #B0B0B0);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 0.35rem;
}
.contact-card-value {
  font-family: var(--font-body, 'Inter', sans-serif);
  font-weight: var(--fw-body, 300);
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--color-text-primary, #FFFFFF);
  margin: 0 0 0.75rem;
  word-break: break-word;
}
.contact-card-link {
  color: var(--color-accent, #00FFFF);
  text-decoration: none;
  position: relative;
  transition: color var(--transition-fast, 0.2s ease);
}
.contact-card-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 1px;
  background: var(--color-accent, #00FFFF);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base, 0.35s ease);
}
.contact-card-link:hover,
.contact-card-link:focus-visible {
  color: var(--color-secondary, #FFD700);
}
.contact-card-link:hover::after,
.contact-card-link:focus-visible::after {
  transform: scaleX(1);
  background: var(--color-secondary, #FFD700);
}
.contact-card-desc {
  font-size: var(--fs-small, 0.875rem);
  color: var(--color-text-secondary, #B0B0B0);
  margin: 0;
  line-height: 1.5;
}
.contact-card-desc-note {
  font-size: var(--fs-tiny, 0.75rem);
  color: rgba(176, 176, 176, 0.7);
  border-left: 2px solid var(--color-border, #2D2D44);
  padding-left: 0.75rem;
  margin-top: auto;
}
.contact-info-footnote {
  width: 100%;
  max-width: 720px;
  margin: var(--spacing-xl, 3rem) auto 0;
  text-align: center;
  font-size: var(--fs-small, 0.875rem);
  color: var(--color-text-secondary, #B0B0B0);
  line-height: 1.6;
  padding: var(--spacing-md, 1rem) var(--spacing-lg, 2rem);
  border-top: 1px solid var(--color-border, #2D2D44);
}

/* ── 响应说明 ── */
.contact-section-response {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg, 2rem);
  align-items: center;
}
.contact-response-visual {
  width: 100%;
  max-width: 400px;
  border-radius: var(--radius-md, 8px);
  overflow: hidden;
  border: 1px solid var(--contact-card-border-glow, rgba(255,215,0,0.2));
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
  transition: border-color var(--transition-base, 0.35s ease);
}
.contact-response-visual:hover {
  border-color: var(--color-secondary, #FFD700);
}
.contact-response-img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.contact-response-content {
  width: 100%;
  max-width: 600px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.contact-response-card {
  background: var(--color-card-bg, #1A1A2E);
  border: 1px solid var(--color-border, #2D2D44);
  border-radius: var(--radius-md, 8px);
  padding: var(--spacing-xl, 3rem) var(--spacing-lg, 2rem);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md, 1rem);
  width: 100%;
  transition: border-color var(--transition-base, 0.35s ease),
              box-shadow var(--transition-base, 0.35s ease);
}
.contact-response-card:hover {
  border-color: var(--color-accent, #00FFFF);
  box-shadow: 0 0 24px rgba(0, 255, 255, 0.08);
}
.contact-response-icon {
  color: var(--color-accent, #00FFFF);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 255, 255, 0.08);
  border-radius: 50%;
  padding: 8px;
  transition: background var(--transition-fast, 0.2s ease),
              transform var(--transition-fast, 0.2s ease);
}
.contact-response-card:hover .contact-response-icon {
  background: rgba(0, 255, 255, 0.18);
  transform: scale(1.05);
}
.contact-response-text {
  font-family: var(--font-body, 'Inter', sans-serif);
  font-weight: var(--fw-body, 300);
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--color-text-primary, #FFFFFF);
  line-height: 1.7;
  margin: 0;
  max-width: 480px;
}
.contact-response-note {
  font-size: var(--fs-small, 0.875rem);
  color: var(--color-text-secondary, #B0B0B0);
  margin: var(--spacing-md, 1rem) 0 0;
  text-align: center;
}
.contact-email-inline {
  color: var(--color-accent, #00FFFF);
  text-decoration: none;
  transition: color var(--transition-fast, 0.2s ease);
}
.contact-email-inline:hover,
.contact-email-inline:focus-visible {
  color: var(--color-secondary, #FFD700);
  text-decoration: underline;
}

/* ── 底部操作按钮 ── */
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-md, 1rem);
  width: 100%;
  margin-top: var(--spacing-lg, 2rem);
}
.contact-actions .btn-outline,
.contact-actions .btn-gold {
  min-width: 180px;
  text-align: center;
}

/* ── 媒体查询：平板及以上 ── */
@media (min-width: 640px) {
  .page-contact {
    padding: calc(var(--header-height, 64px) + 2rem) 2rem 4rem;
  }
  .contact-cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .contact-card:last-child {
    grid-column: 1 / -1;
    max-width: 520px;
    justify-self: center;
  }
  .contact-section-response {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--spacing-xl, 3rem);
  }
  .contact-response-visual {
    flex: 0 0 340px;
    max-width: 340px;
  }
  .contact-response-content {
    flex: 1;
    align-items: flex-start;
    text-align: left;
  }
  .contact-response-card {
    align-items: flex-start;
  }
  .contact-response-text {
    text-align: left;
  }
  .contact-response-note {
    text-align: left;
  }
}

@media (min-width: 960px) {
  .page-contact {
    padding: calc(var(--header-height, 64px) + 3rem) 0 5rem;
  }
  .contact-container {
    padding: 0 2rem;
  }
  .contact-cards {
    grid-template-columns: repeat(3, 1fr);
  }
  .contact-card:last-child {
    grid-column: auto;
    max-width: none;
    justify-self: auto;
  }
  .contact-response-visual {
    flex: 0 0 400px;
    max-width: 400px;
  }
  .contact-section-heading {
    margin-bottom: var(--spacing-xl, 3rem);
  }
}

/* ── 极高密度屏幕微调 ── */
@media (min-width: 1400px) {
  .contact-container {
    padding: 0 0;
  }
  .contact-card {
    padding: var(--spacing-2xl, 5rem) var(--spacing-xl, 3rem);
  }
}
<<<PAGE_JS>>>
(function() {
  'use strict';
  var year = new Date().getFullYear();
  var els = document.querySelectorAll('[data-year]');
  for (var i = 0; i < els.length; i++) {
    els[i].textContent = year;
  }

  var navToggle = document.querySelector('[data-nav-toggle]');
  var nav = document.querySelector('[data-nav]');
  if (navToggle && nav) {
    navToggle.addEventListener('click', function() {
      var isOpen = nav.getAttribute('data-open') === 'true';
      nav.setAttribute('data-open', isOpen ? 'false' : 'true');
      navToggle.setAttribute('aria-expanded', isOpen ? 'false' : 'true');
    });
  }

  var progress = document.querySelector('[data-scroll-progress]');
  if (progress) {
    window.addEventListener('scroll', function() {
      var scrollTop = window.scrollY;
      var docHeight = document.documentElement.scrollHeight - window.innerHeight;
      var pct = docHeight > 0 ? Math.min(scrollTop / docHeight, 1) : 0;
      progress.style.width = (pct * 100) + '%';
    });
  }
})();