.page-contact {
  background:
    linear-gradient(180deg, var(--lake-tint) 0, rgba(238, 245, 251, 0) 340px),
    var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  padding-bottom: 88px;
}

.page-contact .crumbs {
  padding-top: 22px;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  padding-top: 26px;
}

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

.page-contact .eyebrow {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--lake);
}

.page-contact h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 6vw, 52px);
  line-height: 1.16;
  letter-spacing: 0.01em;
  color: var(--lake-deep);
  max-width: 15em;
}

.page-contact .hero-lead::after {
  content: "";
  display: block;
  width: 88px;
  height: 6px;
  margin-top: 22px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--lake-deep), var(--lake) 55%, var(--gold));
}

.page-contact .hero-side .lede {
  margin: 0;
  font-size: 17px;
  line-height: 1.75;
  font-weight: 500;
  color: var(--ink-soft);
}

.page-contact .hero-facts {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-contact .hero-facts li {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 6px 12px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 15px;
}

.page-contact .hero-facts .mono {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: var(--mist);
}

.page-contact .hero-facts strong {
  font-weight: 600;
  color: var(--lake-deep);
}

/* ---------- 图形 ---------- */
.page-contact .contact-figure {
  margin: 46px 0 0;
}

.page-contact .media__frame {
  overflow: hidden;
  border-radius: var(--radius-m);
  background: var(--lake-soft);
  aspect-ratio: 16 / 10;
}

.page-contact .media__frame img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-contact .media__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* ---------- 主体分栏 ---------- */
.page-contact .contact-body {
  margin-top: 62px;
}

.page-contact .split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 44px;
}

.page-contact .section__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 3.4vw, 28px);
  line-height: 1.3;
  color: var(--lake-deep);
}

.page-contact .aside-note,
.page-contact .aside-foot {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .aside-foot {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  padding-top: 6px;
}

.page-contact .split-lede {
  margin: 14px 0 26px;
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-contact .split-lede a,
.page-contact .coop-item a,
.page-contact .prep-intro a,
.page-contact .prep-foot a,
.page-contact .reg-note a {
  color: var(--lake);
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 121, 183, 0.35);
}

.page-contact .split-lede a:hover,
.page-contact .coop-item a:hover,
.page-contact .prep-intro a:hover,
.page-contact .prep-foot a:hover,
.page-contact .reg-note a:hover {
  border-bottom-color: var(--lake);
}

/* ---------- 渠道卡片 ---------- */
.page-contact .chan {
  margin-top: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--white);
  overflow: hidden;
  transition: border-color var(--t-fast) var(--ease);
}

.page-contact .chan[open] {
  border-color: rgba(31, 121, 183, 0.34);
}

.page-contact .chan__head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  background: var(--lake-tint);
  transition: background var(--t-fast) var(--ease);
}

.page-contact .chan__head::-webkit-details-marker {
  display: none;
}

.page-contact .chan__head:hover {
  background: var(--lake-soft);
}

.page-contact .chan__code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--lake);
}

.page-contact .chan__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--lake-deep);
}

.page-contact .chan__head .tag {
  margin-left: auto;
  white-space: nowrap;
}

.page-contact .chan__body {
  padding: 16px;
  border-top: 1px solid var(--line-soft);
}

.page-contact .chan__value {
  margin: 0 0 12px;
  padding: 9px 11px;
  border-radius: var(--radius-s);
  background: var(--lake-tint);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--lake-deep);
  word-break: break-all;
}

.page-contact .copy-btn {
  font-family: var(--font-mono);
  font-size: 12.5px;
}

.page-contact .chan__col {
  margin-top: 16px;
  padding-left: 13px;
  border-left: 3px solid var(--line);
}

.page-contact .chan__col--yes {
  border-left-color: var(--grass);
}

.page-contact .chan__col--no {
  border-left-color: var(--amber);
}

.page-contact .chan__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-contact .chan__col ul {
  margin: 8px 0 0;
  padding-left: 16px;
}

.page-contact .chan__col li {
  margin-bottom: 3px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--ink-soft);
}

/* ---------- 合作方向 ---------- */
.page-contact .coop-list {
  display: grid;
  gap: 14px;
}

.page-contact .coop-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 18px 20px;
  border: 1px solid var(--line-soft);
  border-left: 4px solid var(--lake);
  border-radius: var(--radius-m);
  background: var(--white);
}

.page-contact .coop-item--grass {
  border-left-color: var(--grass);
}

.page-contact .coop-item--gold {
  border-left-color: var(--gold);
}

.page-contact .coop-item__code {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-contact .coop-item__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 17.5px;
  font-weight: 700;
  color: var(--lake-deep);
}

.page-contact .coop-item p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ink-soft);
}

/* ---------- 准备清单 ---------- */
.page-contact .prep {
  margin-top: 46px;
  padding: 24px 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-l);
  background: var(--lake-tint);
}

.page-contact .prep-intro {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-contact .prep-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-contact .prep-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-s);
  background: var(--white);
  transition: background var(--t-fast) var(--ease);
}

.page-contact .prep-item:hover {
  background: var(--grass-soft);
}

.page-contact .prep-item input {
  appearance: none;
  -webkit-appearance: none;
  position: relative;
  flex: 0 0 18px;
  width: 18px;
  height: 18px;
  margin: 3px 0 0;
  border: 1.5px solid var(--lake);
  border-radius: 5px;
  background: var(--white);
  cursor: pointer;
  transition: background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-contact .prep-item input:checked {
  background: var(--grass);
  border-color: var(--grass);
}

.page-contact .prep-item input:checked::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 6px;
  height: 10px;
  border-right: 2px solid var(--white);
  border-bottom: 2px solid var(--white);
  transform: rotate(40deg);
}

.page-contact .prep-item label {
  font-size: 15px;
  line-height: 1.68;
  color: var(--ink-soft);
  cursor: pointer;
}

.page-contact .prep-foot {
  margin: 18px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* ---------- 登记信息 ---------- */
.page-contact .contact-registry {
  margin-top: 74px;
  padding-top: 44px;
  border-top: 1px solid var(--line);
}

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

.page-contact .registry-lede {
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-contact .reg-list {
  margin: 26px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-contact .reg-list > div {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .reg-list dt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-contact .reg-list dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink);
  word-break: break-word;
}

.page-contact .reg-note {
  margin: 20px 0 0;
  padding: 14px 16px;
  border-left: 3px solid var(--amber);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
  background: rgba(200, 106, 34, 0.07);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}

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

.page-contact .registry-figure .media__frame {
  aspect-ratio: 10 / 7;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .coop-item {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 18px;
    padding: 20px 24px;
  }

  .page-contact .reg-list > div {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }

  .page-contact .prep {
    padding: 30px 28px;
  }

  .page-contact .media__frame {
    aspect-ratio: 21 / 9;
  }

  .page-contact .registry-figure .media__frame {
    aspect-ratio: 10 / 7;
  }
}

@media (min-width: 900px) {
  .page-contact {
    padding-bottom: 110px;
  }

  .page-contact .hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 56px;
    align-items: end;
  }

  .page-contact .contact-figure {
    margin-top: 56px;
  }

  .page-contact .contact-body {
    margin-top: 76px;
  }

  .page-contact .split {
    grid-template-columns: minmax(0, 400px) minmax(0, 1fr);
    gap: 60px;
    align-items: start;
  }

  .page-contact .registry-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 52px;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .chan,
  .page-contact .chan__head,
  .page-contact .prep-item,
  .page-contact .prep-item input {
    transition: none;
  }
}
</main>