.page-contact {
  --contact-line: var(--color-border);
  position: relative;
  background-color: var(--color-paper);
  background-image:
    linear-gradient(rgba(23, 42, 58, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(23, 42, 58, 0.018) 1px, transparent 1px);
  background-size: 28px 28px;
}

.page-contact a:focus-visible,
.page-contact details summary:focus-visible {
  outline: 2px solid var(--color-cyan);
  outline-offset: 3px;
  border-radius: 0;
}

/* 信纸页眉 */
.contact-letterhead {
  position: relative;
  padding-top: clamp(72px, 9vw, 120px);
  border-bottom: 1px solid var(--color-border);
}

.contact-letterhead::before {
  content: "";
  position: absolute;
  top: 36px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--color-cyan) 0, var(--color-cyan) 120px, var(--color-border) 120px);
  z-index: 1;
}

.contact-letterhead-inner {
  padding-bottom: clamp(44px, 6vw, 72px);
}

.contact-crop {
  position: absolute;
  width: 22px;
  height: 22px;
  z-index: 2;
  pointer-events: none;
  opacity: 0.9;
}

.contact-crop--tl {
  top: 12px;
  left: 12px;
  border-top: 2px solid var(--color-border);
  border-left: 2px solid var(--color-border);
}

.contact-crop--tr {
  top: 12px;
  right: 12px;
  border-top: 2px solid var(--color-border);
  border-right: 2px solid var(--color-border);
}

.contact-crop--bl {
  bottom: 12px;
  left: 12px;
  border-bottom: 2px solid var(--color-border);
  border-left: 2px solid var(--color-border);
}

.contact-crop--br {
  bottom: 12px;
  right: 12px;
  border-bottom: 2px solid var(--color-border);
  border-right: 2px solid var(--color-border);
}

.page-contact .section-kicker {
  margin-bottom: 4px;
}

.page-contact .section-kicker--cyan {
  color: var(--color-cyan-text);
}

.contact-title {
  margin: 12px 0 16px;
  max-width: 860px;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 4.2vw, 3.4rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--color-ink);
}

.contact-lede {
  margin: 0;
  max-width: 640px;
  font-size: clamp(0.9rem, 1.1vw, 1.05rem);
  line-height: 1.8;
  color: var(--color-muted);
}

.contact-summary-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.contact-summary-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.45);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-muted);
}

.contact-summary-chip strong {
  font-weight: 700;
  color: var(--color-cyan-text);
}

/* 01 官方联系方式 */
.contact-directory {
  padding: clamp(44px, 6vw, 80px) 0 20px;
}

.contact-directory-head {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 28px;
}

.contact-subtitle {
  margin: 6px 0 0;
  font-size: clamp(1.3rem, 2vw, 1.8rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-ink);
}

.contact-desc {
  max-width: 520px;
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-muted);
}

.contact-ticket-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.contact-ticket {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 18px 18px 14px;
  background: var(--color-paper);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-frame);
  box-shadow: var(--shadow-card);
  transition: border-color 150ms ease, box-shadow 150ms ease, transform 150ms ease;
}

.contact-ticket:hover {
  border-color: var(--color-cyan);
  border-top-color: var(--color-cyan);
  box-shadow: 4px 4px 0 rgba(0, 184, 176, 0.08);
  transform: translate(-1px, -1px);
}

.ticket-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.ticket-serial {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--color-purple-text);
}

.ticket-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border);
  background: var(--color-paper-layered);
}

.ticket-icon svg {
  width: 20px;
  height: 20px;
  color: var(--color-cyan-text);
}

.ticket-content {
  display: grid;
  gap: 6px;
}

.ticket-type {
  margin: 0;
  font-size: 13px;
  font-weight: 700;
  color: var(--color-muted);
}

.ticket-value {
  font-family: var(--font-mono);
  font-size: clamp(0.85rem, 1.2vw, 1.05rem);
  font-weight: 700;
  color: var(--color-cyan-text);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  word-break: break-all;
  transition: border-color 150ms ease, color 150ms ease;
}

.ticket-value--link:hover,
.ticket-value--link:focus-visible {
  border-bottom-color: var(--color-cyan);
  color: var(--color-ink);
}

.ticket-use {
  margin: 0;
  font-size: 12px;
  line-height: 1.6;
  color: var(--color-muted);
  opacity: 0.55;
  transition: opacity 150ms ease, color 150ms ease;
}

.contact-ticket:hover .ticket-use,
.contact-ticket:focus-within .ticket-use {
  opacity: 1;
  color: var(--color-cyan-text);
}

.ticket-more {
  margin-top: auto;
  border-top: 1px solid var(--color-border);
  padding-top: 6px;
}

.ticket-more summary {
  list-style: none;
  cursor: pointer;
  padding: 6px 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-muted);
  transition: color 150ms ease;
}

.ticket-more summary::-webkit-details-marker {
  display: none;
}

.ticket-more summary::after {
  content: "+";
  float: right;
  font-size: 16px;
  line-height: 1;
  color: var(--color-purple);
  transition: transform 150ms ease;
}

.ticket-more[open] summary::after {
  transform: rotate(45deg);
}

.ticket-more summary:hover,
.ticket-more[open] summary {
  color: var(--color-cyan-text);
}

.ticket-more-body {
  margin-top: 6px;
  padding: 10px 12px;
  border-left: 2px solid var(--color-cyan);
  background: var(--color-paper-layered);
  font-size: 13px;
  line-height: 1.75;
  color: var(--color-muted);
}

.ticket-more-body p {
  margin: 0;
}

.contact-address-strip {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 20px;
  padding: 14px 18px;
  border: 1px solid var(--color-border);
  background: var(--color-paper-layered);
}

.contact-address-strip p {
  margin: 0;
}

.contact-address-strip > p:first-child {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-ink);
}

.address-strip-label {
  margin-right: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--color-purple-text);
}

.address-strip-note {
  font-size: 12px;
  line-height: 1.6;
  color: var(--color-muted);
}

/* 02 哈尔滨联系点 */
.contact-harbin {
  padding: 36px 0 clamp(52px, 8vw, 88px);
}

.contact-harbin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.contact-harbin-address {
  margin: 14px 0 12px;
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 1.8vw, 1.5rem);
  font-weight: 700;
  line-height: 1.5;
  color: var(--color-ink);
}

.contact-harbin-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-muted);
}

.contact-harbin-note {
  list-style: none;
  display: grid;
  gap: 8px;
  margin: 16px 0;
  padding: 0 0 0 14px;
  border-left: 2px solid var(--color-border);
}

.contact-harbin-note li {
  position: relative;
  padding-left: 12px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-muted);
}

.contact-harbin-note li::before {
  content: "";
  position: absolute;
  left: -8px;
  top: 0.55em;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-cyan);
}

.contact-harbin-extra {
  display: inline-block;
  padding: 8px 12px;
  border: 1px dashed var(--color-border);
  background: rgba(255, 255, 255, 0.4);
  font-size: 12px;
  line-height: 1.7;
  color: var(--color-muted);
}

.contact-harbin-media {
  display: grid;
  gap: 8px;
  align-content: start;
}

.contact-harbin-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--color-border);
}

.media-caption {
  margin: 0;
  font-size: 12px;
  color: var(--color-muted);
}

/* 03 沟通边界与回应说明 */
.contact-boundary {
  background: var(--color-frame);
  padding: clamp(44px, 7vw, 84px) 0;
}

.contact-boundary-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-contact .contact-subtitle--light {
  color: var(--color-paper);
}

.contact-boundary-lead {
  margin: 12px 0 0;
  max-width: 560px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(245, 242, 234, 0.75);
}

.contact-boundary-list {
  list-style: none;
  display: grid;
  gap: 12px;
  margin: 24px 0;
  padding: 0;
}

.boundary-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(185, 192, 200, 0.28);
}

.boundary-item-tag {
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
}

.boundary-item-text {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(245, 242, 234, 0.85);
}

.contact-notice {
  margin-top: 20px;
  padding: 16px 18px;
  border: 1px solid rgba(0, 184, 176, 0.45);
  background: rgba(0, 184, 176, 0.08);
}

.contact-notice-title {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--color-neon);
}

.contact-notice p:last-child {
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  color: rgba(245, 242, 234, 0.85);
}

.contact-boundary-media {
  display: grid;
  gap: 12px;
  align-content: start;
}

.contact-boundary-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid rgba(185, 192, 200, 0.3);
}

.page-contact .media-caption--dark {
  color: rgba(245, 242, 234, 0.6);
}

.boundary-hours {
  padding: 14px 16px;
  border-left: 2px solid var(--color-cyan);
  background: rgba(245, 242, 234, 0.06);
}

.boundary-hours-line {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--color-neon);
}

.boundary-hours-bar {
  position: relative;
  height: 6px;
  overflow: hidden;
  background: rgba(185, 192, 200, 0.25);
}

.boundary-hours-bar span {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 37.5%;
  background: linear-gradient(90deg, var(--color-cyan), var(--color-neon));
}

.boundary-hours-note {
  margin: 8px 0 0;
  font-size: 12px;
  color: rgba(245, 242, 234, 0.7);
}

/* 04 更多帮助 */
.contact-more-gallery {
  padding: clamp(44px, 7vw, 84px) 0;
}

.contact-more-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: 14px;
  margin-bottom: 26px;
}

.page-contact .btn--primary {
  display: inline-block;
  padding: 10px 18px;
  border: 1px solid var(--color-frame);
  background: var(--color-frame);
  color: var(--color-paper);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: background-color 150ms ease, border-color 150ms ease;
}

.page-contact .btn--primary:hover {
  border-color: var(--color-cyan-text);
  background: var(--color-cyan-text);
}

.contact-more-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.contact-more-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px;
  border: 1px solid var(--color-border);
  background: var(--color-paper);
  color: var(--color-ink);
  text-decoration: none;
  transition: border-color 150ms ease, box-shadow 150ms ease, transform 150ms ease;
}

.contact-more-card:hover {
  border-color: var(--color-cyan);
  box-shadow: 4px 4px 0 rgba(0, 184, 176, 0.06);
  transform: translateY(-2px);
}

.contact-more-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--color-purple-text);
  transition: color 150ms ease;
}

.contact-more-card:hover .contact-more-num {
  color: var(--color-cyan);
}

.contact-more-title {
  font-size: 15px;
  font-weight: 700;
}

.contact-more-desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-muted);
}

/* 响应式进阶 */
@media (min-width: 640px) {
  .contact-ticket-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .contact-address-strip {
    flex-direction: row;
    justify-content: space-between;
    align-items: baseline;
  }

  .contact-more-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 860px) {
  .contact-harbin-grid {
    grid-template-columns: 7fr 5fr;
    gap: 40px;
  }

  .contact-boundary-grid {
    grid-template-columns: 7fr 5fr;
    gap: 48px;
  }

  .contact-directory-head {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-end;
  }
}

@media (min-width: 1000px) {
  .contact-more-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}