.page-contact {
  --contact-card-bg: #13243a;
  --chat-bubble-agent-bg: #1c2e4a;
  --chat-bubble-user-bg: #0d1f33;
  --timeline-line-color: #2a3f5a;
  --promise-bg: #0f1f35;
  --info-card-border: #2a3f5a;
  display: block;
  max-width: var(--max-content, 1200px);
  margin: 0 auto;
  padding: 1.25rem 1rem 3rem;
  color: var(--text-primary, #ffffff);
}

/* 面包屑 */
.page-contact .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  margin-bottom: 1.5rem;
  color: var(--text-secondary, #b0b8c4);
}

.page-contact .breadcrumb a {
  color: var(--text-secondary, #b0b8c4);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-contact .breadcrumb a:hover {
  color: var(--primary-accent, #d4a745);
}

.page-contact .breadcrumb .meta-divider {
  color: var(--tertiary-accent, #c0c0c0);
}

.page-contact .breadcrumb [aria-current="page"] {
  color: var(--primary-accent, #d4a745);
  font-weight: 600;
}

/* 框景首屏 */
.page-contact .contact-hero {
  position: relative;
  margin-bottom: 2.5rem;
  padding: 2rem 1.5rem;
  border: 1px solid var(--tertiary-accent, #c0c0c0);
  background: linear-gradient(135deg, rgba(10,22,40,0.9) 0%, rgba(28,46,74,0.4) 100%);
}

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

.page-contact .scale-mark {
  position: absolute;
  width: 12px;
  height: 12px;
  border-color: var(--primary-accent, #d4a745);
  border-style: solid;
}

.page-contact .scale-mark.top-left {
  top: -1px;
  left: -1px;
  border-width: 2px 0 0 2px;
}

.page-contact .scale-mark.top-right {
  top: -1px;
  right: -1px;
  border-width: 2px 2px 0 0;
}

.page-contact .scale-mark.bottom-left {
  bottom: -1px;
  left: -1px;
  border-width: 0 0 2px 2px;
}

.page-contact .scale-mark.bottom-right {
  bottom: -1px;
  right: -1px;
  border-width: 0 2px 2px 0;
}

.page-contact .page-title {
  font-size: 2.25rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
  background: linear-gradient(135deg, var(--gold-start, #d4a745), var(--gold-end, #f0c040));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
}

.page-contact .page-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary, #b0b8c4);
  margin: 0 0 1rem;
  line-height: 1.5;
}

.page-contact .gold-divider {
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--gold-start, #d4a745), var(--gold-end, #f0c040));
  margin: 0 0 1rem;
  border: 0;
}

.page-contact .hero-desc {
  font-size: 0.95rem;
  color: var(--text-secondary, #b0b8c4);
  margin: 0;
  max-width: 640px;
  line-height: 1.6;
}

/* 通用section标题 */
.page-contact .section-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--info-card-border, #2a3f5a);
  color: var(--text-primary, #ffffff);
  position: relative;
}

.page-contact .section-title::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 80px;
  height: 2px;
  background: linear-gradient(90deg, var(--gold-start, #d4a745), transparent);
}

/* 双栏非对称布局 — 移动端单栏 */
.page-contact .contact-dual {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}

/* 对话区域 */
.page-contact .chat-section {
  display: flex;
  flex-direction: column;
}

.page-contact .chat-window {
  background: var(--contact-card-bg, #13243a);
  border: 1px solid var(--info-card-border, #2a3f5a);
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 1.5rem;
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.page-contact .chat-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0.75rem 1rem;
  background: rgba(0,0,0,0.25);
  border-bottom: 1px solid var(--info-card-border, #2a3f5a);
}

.page-contact .chat-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--tertiary-accent, #c0c0c0);
  opacity: 0.5;
}

.page-contact .chat-dot:first-child {
  background: var(--secondary-accent, #e63946);
  opacity: 1;
}

.page-contact .chat-dot:nth-child(2) {
  background: var(--primary-accent, #d4a745);
  opacity: 1;
}

.page-contact .chat-label {
  margin-left: auto;
  font-size: 0.8rem;
  color: var(--text-secondary, #b0b8c4);
  font-family: var(--font-mono, ui-monospace, monospace);
  letter-spacing: 0.3px;
}

.page-contact .chat-body {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.page-contact .chat-bubble {
  max-width: 88%;
  padding: 0.75rem 1rem;
  border-radius: 12px;
  font-size: 0.9rem;
  line-height: 1.5;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  will-change: transform;
}

.page-contact .chat-bubble:hover {
  transform: scale(1.02);
  box-shadow: 0 4px 16px rgba(212,167,69,0.15);
}

.page-contact .chat-bubble.agent {
  align-self: flex-start;
  background: var(--chat-bubble-agent-bg, #1c2e4a);
  border: 1px solid rgba(212,167,69,0.2);
  border-bottom-left-radius: 4px;
}

.page-contact .chat-bubble.user {
  align-self: flex-end;
  background: var(--chat-bubble-user-bg, #0d1f33);
  border: 1px solid rgba(192,192,192,0.15);
  border-bottom-right-radius: 4px;
  color: var(--text-secondary, #b0b8c4);
}

.page-contact .chat-bubble.highlight {
  border-color: var(--primary-accent, #d4a745);
  background: linear-gradient(135deg, rgba(212,167,69,0.08), transparent);
}

.page-contact .chat-bubble p {
  margin: 0;
}

.page-contact .bubble-link {
  color: var(--primary-accent, #d4a745);
  text-decoration: none;
  word-break: break-all;
}

.page-contact .bubble-link:hover {
  text-decoration: underline;
  color: var(--nav-hover, #f0c040);
}

.page-contact .chat-figure {
  margin: 0;
  width: 100%;
}

.page-contact .chat-image {
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: 8px;
  border: 1px solid rgba(192,192,192,0.15);
  object-fit: cover;
  aspect-ratio: 5 / 6;
}

/* 时间线区域 */
.page-contact .timeline-section {
  display: flex;
  flex-direction: column;
}

.page-contact .timeline-intro {
  font-size: 0.95rem;
  color: var(--text-secondary, #b0b8c4);
  margin: 0 0 1.5rem;
  line-height: 1.6;
}

.page-contact .timeline {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 1.5rem;
}

.page-contact .timeline::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--primary-accent, #d4a745), var(--timeline-line-color, #2a3f5a) 60%, transparent);
}

.page-contact .timeline-node {
  position: relative;
  margin-bottom: 1.75rem;
  padding-left: 1.25rem;
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.page-contact .timeline-node[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
}

.page-contact .timeline-node[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

.page-contact .timeline-marker {
  position: absolute;
  left: -1.5rem;
  top: 4px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--primary-bg, #0a1628);
  border: 2px solid var(--primary-accent, #d4a745);
  box-shadow: 0 0 0 3px rgba(212,167,69,0.2);
  z-index: 1;
  transition: box-shadow 0.3s ease;
}

.page-contact .timeline-node:hover .timeline-marker {
  box-shadow: 0 0 0 6px rgba(212,167,69,0.3);
}

.page-contact .timeline-content {
  background: var(--contact-card-bg, #13243a);
  padding: 1rem 1.25rem;
  border-radius: 8px;
  border: 1px solid rgba(212,167,69,0.1);
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.page-contact .timeline-content:hover {
  border-color: rgba(212,167,69,0.3);
  transform: translateX(4px);
}

.page-contact .timeline-step {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--primary-accent, #d4a745);
  margin-bottom: 0.25rem;
  letter-spacing: 1px;
}

.page-contact .timeline-content h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0 0 0.35rem;
  color: var(--text-primary, #ffffff);
}

.page-contact .timeline-content p {
  font-size: 0.875rem;
  color: var(--text-secondary, #b0b8c4);
  margin: 0;
  line-height: 1.5;
}

.page-contact .timeline-figure {
  margin: 0 0 1rem;
  width: 100%;
}

.page-contact .timeline-image {
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: 8px;
  border: 1px solid rgba(192,192,192,0.15);
  object-fit: cover;
  aspect-ratio: 5 / 6;
}

.page-contact .timeline-note {
  font-size: 0.9rem;
  color: var(--text-secondary, #b0b8c4);
  margin: 0;
  line-height: 1.6;
}

.page-contact .text-gold {
  color: var(--primary-accent, #d4a745);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-contact .text-gold:hover {
  color: var(--nav-hover, #f0c040);
  text-decoration: underline;
}

.page-contact .text-mono {
  font-family: var(--font-mono, ui-monospace, monospace);
}

/* 联系信息展示区 */
.page-contact .contact-info-section {
  margin-bottom: 2.5rem;
  padding-top: 0.5rem;
}

.page-contact .info-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.page-contact .info-card {
  background: var(--contact-card-bg, #13243a);
  border: 1px solid var(--info-card-border, #2a3f5a);
  border-radius: 10px;
  padding: 1.5rem;
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.page-contact .info-card:hover {
  border-color: var(--primary-accent, #d4a745);
  transform: translateY(-3px);
}

.page-contact .info-card[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease, border-color 0.3s ease;
}

.page-contact .info-card[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

.page-contact .info-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
  line-height: 1;
}

.page-contact .info-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  color: var(--text-primary, #ffffff);
}

.page-contact .info-value {
  display: block;
  font-size: 0.95rem;
  color: var(--primary-accent, #d4a745);
  margin-bottom: 0.35rem;
  word-break: break-all;
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-contact .info-value:hover {
  color: var(--nav-hover, #f0c040);
}

.page-contact .info-desc {
  font-size: 0.85rem;
  color: var(--text-secondary, #b0b8c4);
  margin: 0;
  line-height: 1.5;
}

.page-contact .response-promise {
  background: var(--promise-bg, #0f1f35);
  border: 1px solid rgba(212,167,69,0.15);
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.page-contact .response-promise[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.page-contact .response-promise[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

.page-contact .promise-badge {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--primary-accent, #d4a745);
  background: rgba(212,167,69,0.1);
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  white-space: nowrap;
  letter-spacing: 0.5px;
  border: 1px solid rgba(212,167,69,0.2);
}

.page-contact .response-promise p {
  font-size: 0.9rem;
  color: var(--text-secondary, #b0b8c4);
  margin: 0;
  line-height: 1.6;
  flex: 1;
}

/* 底部导航 */
.page-contact .contact-footer-nav {
  padding-top: 1.5rem;
  border-top: 1px solid var(--info-card-border, #2a3f5a);
  text-align: center;
}

.page-contact .contact-footer-nav[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.page-contact .contact-footer-nav[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

.page-contact .contact-footer-nav p {
  font-size: 0.95rem;
  color: var(--text-secondary, #b0b8c4);
  margin: 0;
  line-height: 1.6;
}

/* data-reveal 默认状态 */
.page-contact [data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.page-contact [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* 桌面端布局 — 768px 以上 */
@media (min-width: 768px) {
  .page-contact {
    padding: 2rem 2rem 4rem;
  }

  .page-contact .contact-hero {
    padding: 3rem 2.5rem;
    margin-bottom: 3rem;
  }

  .page-contact .page-title {
    font-size: 3rem;
  }

  .page-contact .page-subtitle {
    font-size: 1.25rem;
  }

  .page-contact .hero-desc {
    font-size: 1rem;
  }

  /* 双栏并排 */
  .page-contact .contact-dual {
    flex-direction: row;
    align-items: flex-start;
    gap: 2rem;
  }

  .page-contact .chat-section {
    flex: 1 1 45%;
    max-width: 45%;
  }

  .page-contact .timeline-section {
    flex: 1 1 55%;
    max-width: 55%;
  }

  .page-contact .chat-bubble {
    max-width: 85%;
  }

  .page-contact .info-cards {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
  }

  .page-contact .info-card {
    padding: 1.75rem;
  }

  .page-contact .contact-footer-nav p {
    font-size: 1rem;
  }
}

/* 大桌面端精细调整 */
@media (min-width: 1024px) {
  .page-contact {
    padding: 2.5rem 2.5rem 5rem;
  }

  .page-contact .contact-dual {
    gap: 2.5rem;
  }

  .page-contact .page-title {
    font-size: 3.5rem;
  }

  .page-contact .chat-window {
    margin-bottom: 1.75rem;
  }

  .page-contact .timeline {
    padding-left: 2rem;
  }
}

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  .page-contact [data-reveal],
  .page-contact .timeline-node[data-reveal],
  .page-contact .info-card[data-reveal],
  .page-contact .response-promise[data-reveal],
  .page-contact .contact-footer-nav[data-reveal] {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .page-contact .chat-bubble:hover {
    transform: none !important;
  }

  .page-contact .timeline-content:hover {
    transform: none !important;
  }

  .page-contact .info-card:hover {
    transform: none !important;
  }
}
<<<END>>>