.page-contact {
  --contact-line: 2px solid var(--arena-blue);
  --contact-gap: clamp(22px, 3vw, 40px);
  background: var(--space-blue);
  color: var(--paper);
  padding-bottom: clamp(36px, 6vw, 84px);
}

/* 面包屑上下文 */
.page-contact .contact-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: clamp(16px, 3vw, 26px);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}
.page-contact .contact-crumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.page-contact .contact-crumb a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}
.page-contact .contact-crumb span[aria-current="page"] {
  color: var(--paper);
}

/* 首屏 */
.page-contact .contact-hero {
  display: grid;
  gap: clamp(22px, 4vw, 44px);
  padding-top: clamp(22px, 4vw, 42px);
  padding-bottom: clamp(8px, 2vw, 16px);
}
.page-contact .contact-hero__kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0;
}
.page-contact .contact-hero h1 {
  margin: 12px 0 0;
  font-size: clamp(30px, 5.4vw, 54px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--paper);
}
.page-contact .contact-hero__lead {
  margin: 16px 0 0;
  max-width: 44ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--mist);
}
.page-contact .contact-hero__meta {
  margin: 18px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--mist);
}
.page-contact .contact-hero__meta strong {
  color: var(--cyan);
  font-weight: 600;
  font-size: 15px;
}
.page-contact .contact-hero__links {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-contact .contact-photo {
  margin: 0;
  position: relative;
  border: var(--contact-line);
  box-shadow: var(--shadow-hard);
  background: var(--night-blue);
  overflow: hidden;
}
.page-contact .contact-photo img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}
.page-contact .contact-photo__tag {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 6px 10px;
  background: var(--space-blue);
  border-top: 2px solid var(--cyan);
  border-right: 2px solid var(--cyan);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

/* 左卡右单 */
.page-contact .contact-shell {
  margin-top: clamp(26px, 4.5vw, 52px);
  display: grid;
  gap: var(--contact-gap);
}

.page-contact .contact-card {
  display: grid;
  gap: 16px;
  align-content: start;
  padding: clamp(16px, 2.4vw, 26px);
  background: var(--night-blue);
  border: 2px solid var(--arena-blue);
  box-shadow: var(--shadow-hard);
}
.page-contact .contact-card__status {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(22, 74, 138, 0.7);
}
.page-contact .contact-dot {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--cyan);
  animation: contact-dot-pulse 2.4s ease-in-out infinite;
}
@keyframes contact-dot-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(59, 240, 220, 0.55); }
  50% { box-shadow: 0 0 0 6px rgba(59, 240, 220, 0); }
}
.page-contact .contact-card__group {
  display: grid;
  gap: 7px;
}
.page-contact .contact-card__group .label {
  margin: 0;
  color: var(--mist);
}
.page-contact .contact-card__note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
  border-left: 4px solid var(--orange);
  padding-left: 12px;
}
.page-contact .contact-card__cta {
  justify-self: start;
}

.page-contact .copy {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 6px 10px;
  width: 100%;
  padding: 10px 12px;
  background: rgba(22, 74, 138, 0.22);
  border: 1px solid rgba(22, 74, 138, 0.9);
  color: var(--paper);
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease);
}
.page-contact .copy:hover {
  border-color: var(--cyan);
  background: rgba(59, 240, 220, 0.08);
}
.page-contact .copy__value {
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: 0.04em;
  color: var(--cyan);
  overflow-wrap: anywhere;
  min-width: 0;
}
.page-contact .copy__hint {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}
.page-contact .copy[data-copied="true"] .copy__hint {
  color: var(--orange);
}

/* 右侧正文 */
.page-contact .contact-body {
  display: grid;
  gap: clamp(30px, 4.6vw, 56px);
  min-width: 0;
}
.page-contact .contact-block {
  border-top: 2px solid var(--arena-blue);
  padding-top: clamp(16px, 2.4vw, 24px);
  min-width: 0;
}
.page-contact .contact-block__head {
  margin-bottom: clamp(14px, 2vw, 22px);
}
.page-contact .contact-block__num {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}
.page-contact .contact-block h2 {
  margin: 0;
  font-size: clamp(21px, 2.7vw, 29px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--paper);
}
.page-contact .contact-block__intro {
  margin: 10px 0 0;
  max-width: 54ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* 通道清单 */
.page-contact .channel-list {
  border-top: 1px solid rgba(22, 74, 138, 0.55);
}
.page-contact .channel {
  display: grid;
  gap: 6px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(22, 74, 138, 0.55);
}
.page-contact .channel__name {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 3px;
  font-size: 15px;
  font-weight: 800;
  color: var(--paper);
}
.page-contact .channel__value {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--cyan);
  overflow-wrap: anywhere;
}
.page-contact .channel__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--mist);
}
.page-contact .channel__eta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
}
.page-contact .contact-block__foot {
  margin: 16px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
  padding-left: 12px;
  border-left: 4px solid var(--cyan);
}

/* 分流图与折叠清单 */
.page-contact .contact-figure {
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  border: var(--contact-line);
  box-shadow: var(--shadow-mid);
  background: var(--night-blue);
}
.page-contact .contact-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}
.page-contact .route-list {
  display: grid;
  gap: 12px;
}
.page-contact .route {
  background: var(--night-blue);
  border: 2px solid var(--arena-blue);
  box-shadow: var(--shadow-soft);
  transition: border-color 0.18s var(--ease), transform 0.18s var(--ease), box-shadow 0.18s var(--ease);
}
.page-contact .route:hover {
  border-color: var(--cyan);
  box-shadow: var(--shadow-mid);
  transform: translateY(-2px);
}
.page-contact .route summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  padding: 12px 14px;
  cursor: pointer;
  list-style: none;
}
.page-contact .route summary::-webkit-details-marker {
  display: none;
}
.page-contact .route summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--cyan);
}
.page-contact .route[open] summary::after {
  content: "−";
}
.page-contact .route[open] {
  border-color: var(--cyan);
  background: #0e2b4d;
}
.page-contact .route__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}
.page-contact .route__title {
  font-size: 15.5px;
  font-weight: 800;
  color: var(--paper);
}
.page-contact .route__via {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--orange);
  margin-left: auto;
}
.page-contact .route__body {
  padding: 12px 14px 16px;
  border-top: 1px solid rgba(22, 74, 138, 0.7);
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--mist);
}
.page-contact .route__body p {
  margin: 0;
}
.page-contact .route__body p + p {
  margin-top: 10px;
}
.page-contact .route__body strong {
  color: var(--paper);
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: 0.04em;
}
.page-contact .route__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(59, 240, 220, 0.5);
  transition: border-color 0.18s var(--ease);
}
.page-contact .route__body a:hover {
  border-bottom-color: var(--cyan);
}

/* 到馆信息 */
.page-contact .arrive-list {
  margin: 0;
  border-top: 1px solid rgba(22, 74, 138, 0.55);
}
.page-contact .arrive-row {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(22, 74, 138, 0.55);
}
.page-contact .arrive-row dt {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}
.page-contact .arrive-row dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--paper);
}
.page-contact .arrive-row dd .mono {
  color: var(--cyan);
}
.page-contact .arrive-row dd a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(59, 240, 220, 0.5);
}
.page-contact .arrive-row dd a:hover {
  border-bottom-color: var(--cyan);
}

/* 准备清单 */
.page-contact .prep-list {
  display: grid;
  gap: 12px;
}
.page-contact .prep {
  background: var(--night-blue);
  border-left: 4px solid var(--cyan);
  box-shadow: var(--shadow-soft);
  padding: 14px 16px;
}
.page-contact .prep__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--orange);
}
.page-contact .prep h3 {
  margin: 7px 0 6px;
  font-size: 15px;
  font-weight: 800;
  color: var(--paper);
}
.page-contact .prep p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

/* 页尾地址带 */
.page-contact .coord-band {
  margin-top: clamp(34px, 5vw, 64px);
  position: relative;
  background: linear-gradient(180deg, var(--night-blue) 0%, var(--space-blue) 100%);
  border-top: 2px solid var(--cyan);
  border-bottom: 2px solid var(--arena-blue);
}
.page-contact .coord-band::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 8px;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(59, 240, 220, 0.75) 0,
    rgba(59, 240, 220, 0.75) 1px,
    transparent 1px,
    transparent 24px
  );
  pointer-events: none;
}
.page-contact .coord-band__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px 28px;
  padding-top: clamp(22px, 3vw, 32px);
  padding-bottom: clamp(22px, 3vw, 32px);
}
.page-contact .coord-band__text {
  margin: 0;
  font-size: clamp(14px, 1.6vw, 17px);
  line-height: 1.7;
  color: var(--paper);
  max-width: 62ch;
}
.page-contact .coord-band__text .mono {
  color: var(--cyan);
  margin-right: 10px;
}
.page-contact .coord-band__hint {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}

/* 断点 */
@media (min-width: 720px) {
  .page-contact .channel {
    grid-template-columns: 168px minmax(0, 1fr) 148px;
    align-items: start;
    gap: 18px;
  }
  .page-contact .arrive-row {
    grid-template-columns: 108px minmax(0, 1fr);
    align-items: start;
    gap: 18px;
  }
  .page-contact .arrive-row dt {
    padding-top: 5px;
  }
  .page-contact .prep-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }
  .page-contact .route:nth-child(even) {
    margin-left: 32px;
  }
}

@media (min-width: 960px) {
  .page-contact .contact-shell {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
    gap: clamp(28px, 3.5vw, 48px);
  }
  .page-contact .contact-card {
    position: sticky;
    top: 104px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-dot {
    animation: none;
  }
  .page-contact .route,
  .page-contact .route:hover,
  .page-contact .copy,
  .page-contact .contact-crumb a {
    transition: none;
    transform: none;
  }
}
<<<END>>>