.page-contact {
  --ct-line: #1E2F66;
  --ct-line-soft: rgba(30, 47, 102, .8);
  --ct-glow: rgba(47, 242, 213, .35);
  color: var(--ice-050);
  font-family: var(--font-head);
}

/* ---------- 首屏 ---------- */
.page-contact .crumb {
  margin-bottom: 18px;
}

.page-contact .contact-hero {
  padding-top: 24px;
}

.page-contact .contact-hero__grid {
  display: grid;
  gap: 28px;
}

.page-contact .contact-hero__title {
  margin: 14px 0 0;
  font-size: clamp(32px, 7.2vw, 56px);
  font-weight: 300;
  line-height: 1.14;
  letter-spacing: -.015em;
  color: var(--ice-050);
}

.page-contact .contact-hero__intro {
  margin: 20px 0 0;
  max-width: 36em;
  font-size: 17px;
  line-height: 1.85;
  color: var(--ice-300);
}

.page-contact .contact-hero__meta {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .contact-hero__meta li {
  padding-left: 14px;
  border-left: 2px solid var(--ct-line);
  font-size: 14px;
  color: var(--ice-300);
}

.page-contact .contact-hero__meta .num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 22px;
  color: var(--cyan-500);
  letter-spacing: -.02em;
}

.page-contact .contact-hero__meta .unit {
  font-size: 14px;
  color: var(--ice-300);
}

.page-contact .contact-hero__meta-note {
  display: block;
  margin-top: 2px;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--ice-300);
}

.page-contact .contact-hero__figure {
  margin: 0;
}

.page-contact .figure__media img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r-lg);
  object-fit: cover;
}

.page-contact .figure__cap {
  margin-top: 10px;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--ice-300);
}

/* ---------- 章节头部 ---------- */
.page-contact .sec-head {
  margin-bottom: 26px;
}

.page-contact .sec-head__title {
  margin: 8px 0 0;
  font-size: clamp(24px, 4.6vw, 40px);
  font-weight: 300;
  line-height: 1.24;
  letter-spacing: -.01em;
  color: var(--ice-050);
}

.page-contact .sec-head__note {
  margin: 12px 0 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ice-300);
}

/* ---------- 01 渠道与场景 ---------- */
.page-contact .contact-split {
  display: grid;
  gap: 20px;
}

.page-contact .contact-card {
  position: relative;
  border-radius: 32px;
  padding: 30px 24px;
  background: linear-gradient(180deg, #142048 0%, #0C1533 100%);
  border: 1px solid var(--ct-line);
  transition: border-color 200ms var(--ease), box-shadow 200ms var(--ease);
}

.page-contact .contact-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: var(--aurora);
  opacity: .3;
  pointer-events: none;
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
}

.page-contact .contact-card:hover,
.page-contact .contact-card:focus-within {
  border-color: var(--cyan-500);
  box-shadow: 0 0 0 1px var(--ct-glow), 0 24px 48px -32px var(--ct-glow);
}

.page-contact .contact-card__label {
  margin: 0;
  font-size: 13px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ice-300);
}

.page-contact .contact-card__value {
  margin: 10px 0 16px;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--cyan-500);
  word-break: break-all;
}

.page-contact .contact-card__hint {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ice-300);
}

.page-contact .contact-card__row {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--ct-line-soft);
}

.page-contact .contact-card__plain {
  margin: 12px 0 0;
  font-size: 17px;
  line-height: 1.7;
  color: var(--ice-050);
}

.page-contact .copy-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: var(--r-pill);
  border: 1px solid var(--orange-500);
  background: rgba(255, 122, 46, .12);
  color: var(--orange-200);
  font-family: var(--font-head);
  font-size: 13px;
  letter-spacing: .08em;
  cursor: pointer;
  transition: background-color 180ms var(--ease), color 180ms var(--ease);
}

.page-contact .copy-pill:hover {
  background: var(--orange-500);
  color: var(--sky-900);
}

.page-contact .copy-pill:focus-visible {
  outline: 2px solid var(--orange-500);
  outline-offset: 2px;
}

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

.page-contact .route-item {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 18px 18px 14px;
  border-radius: var(--r-lg);
  background: #0C1533;
  border: 1px solid var(--ct-line);
  transition: transform 200ms var(--ease), border-color 200ms var(--ease), background-color 200ms var(--ease);
}

.page-contact .route-item__no {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 46px;
  border-radius: var(--r-md);
  background: rgba(47, 242, 213, .1);
  border: 1px solid rgba(47, 242, 213, .28);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  color: var(--cyan-500);
}

.page-contact .route-item__title {
  margin: 0;
  font-size: 17px;
  font-weight: 500;
  color: var(--ice-050);
}

.page-contact .route-item__desc {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ice-300);
}

/* ---------- 02 邮件要素 ---------- */
.page-contact .mail-grid {
  display: grid;
  gap: 24px;
}

.page-contact .prose p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ice-300);
}

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

.page-contact .mail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .mail-list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 16px 18px;
  border-radius: var(--r-md);
  background: #142048;
  border-left: 2px solid var(--cyan-500);
  font-size: 15px;
  line-height: 1.75;
  color: var(--ice-300);
}

.page-contact .mail-list li strong {
  display: block;
  margin-bottom: 2px;
  font-weight: 500;
  color: var(--ice-050);
}

.page-contact .mail-list__no {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  color: var(--orange-500);
  padding-top: 2px;
}

/* ---------- 03 合作对接 ---------- */
.page-contact .coop-grid {
  display: grid;
  gap: 16px;
}

.page-contact .coop-card {
  display: flex;
  flex-direction: column;
  padding: 24px 22px;
  border-radius: var(--r-xl);
  background: linear-gradient(160deg, #142048 0%, #0C1533 100%);
  border: 1px solid var(--ct-line);
  transition: transform 200ms var(--ease), border-color 200ms var(--ease);
}

.page-contact .coop-card__title {
  margin: 16px 0 0;
  font-size: 20px;
  font-weight: 400;
  line-height: 1.4;
  color: var(--ice-050);
}

.page-contact .coop-card__body {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ice-300);
}

.page-contact .coop-card__foot {
  margin: 20px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--ct-line);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan-300);
}

/* ---------- 04 回复节奏 ---------- */
.page-contact .pulse-grid {
  display: grid;
  gap: 24px;
}

.page-contact .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .timeline__item {
  position: relative;
  padding: 20px 20px 20px 22px;
  border-radius: var(--r-lg);
  background: #0C1533;
  border: 1px solid var(--ct-line);
  transition: border-color 200ms var(--ease), background-color 200ms var(--ease);
}

.page-contact .timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  bottom: 20px;
  width: 2px;
  border-radius: var(--r-pill);
  background: var(--aurora);
}

.page-contact .timeline__no {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan-500);
}

.page-contact .timeline__title {
  margin: 10px 0 0;
  font-size: 18px;
  font-weight: 500;
  color: var(--ice-050);
}

.page-contact .timeline__desc {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ice-300);
}

.page-contact .pulse-figure {
  margin: 0;
}

/* ---------- 05 站点信息 ---------- */
.page-contact .site-facts {
  display: grid;
  gap: 1px;
  margin: 0;
  border: 1px solid var(--ct-line);
  border-radius: var(--r-lg);
  background: var(--ct-line);
  overflow: hidden;
}

.page-contact .site-facts__row {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  background: #0C1533;
}

.page-contact .site-facts dt {
  margin: 0;
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--ice-300);
}

.page-contact .site-facts dd {
  margin: 0;
  font-size: 16px;
  line-height: 1.7;
  color: var(--ice-050);
}

.page-contact .site-facts dd.is-mono {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 15px;
  color: var(--cyan-300);
  word-break: break-all;
}

.page-contact .ct-links {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.page-contact .ct-link {
  display: block;
  padding: 18px 20px;
  border-radius: var(--r-lg);
  border: 1px solid var(--ct-line);
  background: #0C1533;
  color: var(--ice-050);
  text-decoration: none;
  transition: border-color 180ms var(--ease), background-color 180ms var(--ease), transform 180ms var(--ease);
}

.page-contact .ct-link__title {
  display: block;
  font-size: 17px;
  font-weight: 500;
}

.page-contact .ct-link__note {
  display: block;
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ice-300);
}

.page-contact .ct-link:hover {
  border-color: var(--cyan-500);
  background: #142048;
}

.page-contact .ct-link:focus-visible {
  outline: 2px solid var(--orange-500);
  outline-offset: 2px;
}

/* ---------- 悬停层次 ---------- */
@media (hover: hover) {
  .page-contact .route-item:hover {
    transform: translateX(4px);
    border-color: var(--cyan-500);
    background: #182A5C;
  }

  .page-contact .coop-card:hover,
  .page-contact .timeline__item:hover {
    transform: translateY(-3px);
    border-color: var(--cyan-500);
  }
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 640px) {
  .page-contact .contact-hero__meta {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .ct-links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .site-facts__row {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
    padding: 18px 22px;
  }
}

@media (min-width: 820px) {
  .page-contact .coop-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .mail-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: 36px;
    align-items: start;
  }

  .page-contact .timeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .timeline__item {
    padding-top: 26px;
  }
}

@media (min-width: 940px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 48px;
    align-items: center;
  }

  .page-contact .contact-split {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 1fr);
    gap: 32px;
    align-items: start;
  }

  .page-contact .contact-card {
    padding: 38px 34px;
  }

  .page-contact .contact-card__value {
    font-size: 26px;
  }

  .page-contact .pulse-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
    gap: 36px;
    align-items: start;
  }

  .page-contact .pulse-figure .figure__media img {
    border-radius: var(--r-xl);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .route-item,
  .page-contact .coop-card,
  .page-contact .timeline__item,
  .page-contact .ct-link,
  .page-contact .copy-pill,
  .page-contact .contact-card {
    transition: none;
  }
}