.page-contact {
  --pc-rail-w: 210px;
  --pc-step-gap: clamp(20px, 3vw, 36px);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  padding-top: clamp(24px, 4vw, 48px);
  position: relative;
  overflow: hidden;
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto auto;
  width: 46vw;
  height: 46vw;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(70, 240, 190, 0.12), transparent 68%);
  pointer-events: none;
}

.page-contact .contact-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4.5vw, 60px);
  align-items: center;
}

.page-contact .contact-hero__copy h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5.6vw, 60px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--paper);
  margin: 12px 0 18px;
}

.page-contact .contact-hero__lead {
  font-size: 17px;
  line-height: 1.8;
  color: var(--mist);
  max-width: 46ch;
  margin-bottom: 28px;
}

.page-contact .contact-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-m);
  overflow: hidden;
  margin: 0 0 30px;
}

.page-contact .fact {
  background: rgba(28, 58, 48, 0.42);
  padding: 16px 18px;
}

.page-contact .fact__label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--stone);
  margin: 0 0 6px;
}

.page-contact .fact__value {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(20px, 2.6vw, 26px);
  color: var(--cyan);
  letter-spacing: -0.01em;
}

.page-contact .contact-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-contact .contact-hero__figure {
  margin: 0;
  border-radius: var(--radius-m);
  overflow: hidden;
  border: 1px solid var(--glass-brd);
  background: var(--moss);
}

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

.page-contact .contact-hero__figure .figure__caption {
  padding: 12px 16px;
  font-size: 12px;
  color: var(--stone);
  border-top: 1px solid var(--line-soft);
}

/* ---------- 主体双栏 ---------- */
.page-contact .contact-body {
  padding-top: clamp(40px, 6vw, 84px);
}

.page-contact .contact-body__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 56px);
}

.page-contact .contact-rail {
  display: none;
}

.page-contact .contact-rail__note {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--stone);
  border-left: 2px solid var(--clay);
  padding-left: 12px;
}

.page-contact .contact-flow {
  display: grid;
  gap: clamp(48px, 7vw, 96px);
  min-width: 0;
}

/* ---------- 区块标题 ---------- */
.page-contact .block-head {
  max-width: 62ch;
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-contact .block-head h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--paper);
  margin: 8px 0 12px;
}

.page-contact .block-head__lead {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--stone);
}

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

.page-contact .dir-card {
  position: relative;
  padding: clamp(20px, 2.6vw, 28px) clamp(20px, 3vw, 32px);
  background: rgba(28, 58, 48, 0.5);
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--cyan);
  border-radius: var(--radius-s);
  transition: background 0.25s ease, border-left-color 0.25s ease;
}

.page-contact .dir-card:nth-child(2) { border-left-color: var(--amber); }
.page-contact .dir-card:nth-child(3) { border-left-color: var(--mist); }
.page-contact .dir-card:nth-child(4) { border-left-color: var(--clay); }

.page-contact .dir-card:hover {
  background: rgba(28, 58, 48, 0.78);
}

.page-contact .dir-card__idx {
  margin: 0 0 8px;
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--stone);
}

.page-contact .dir-card__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.2vw, 24px);
  color: var(--paper);
  letter-spacing: -0.01em;
}

.page-contact .dir-card__desc {
  margin: 0 0 12px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .dir-card__fit {
  margin: 0;
  font-size: 13px;
  color: var(--stone);
  padding-top: 12px;
  border-top: 1px dashed var(--line-soft);
}

/* ---------- 资源 ---------- */
.page-contact .asset-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-contact .asset-card {
  padding: 22px 22px 24px;
  background: linear-gradient(160deg, rgba(14, 32, 54, 0.9), rgba(10, 31, 25, 0.9));
  border: 1px solid var(--glass-brd);
  border-radius: var(--radius-s);
}

.page-contact .asset-card__title {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
  letter-spacing: 0.01em;
}

.page-contact .asset-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .asset-scale {
  margin-top: clamp(22px, 3vw, 34px);
  padding: clamp(22px, 3vw, 32px);
  border-radius: var(--radius-m);
  background: rgba(6, 18, 29, 0.72);
  border: 1px solid var(--line-soft);
}

.page-contact .asset-scale__lead {
  margin: 0 0 18px;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--stone);
}

.page-contact .asset-scale__list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 24px;
}

.page-contact .asset-scale__list li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
}

.page-contact .asset-scale__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(20px, 2.6vw, 26px);
  color: var(--amber);
  letter-spacing: -0.01em;
}

.page-contact .asset-scale__txt {
  font-size: 13.5px;
  color: var(--stone);
}

.page-contact .asset-scale__note {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .asset-scale__note a,
.page-contact .channel-foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(70, 240, 190, 0.4);
}

.page-contact .asset-scale__note a:hover,
.page-contact .channel-foot a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 流程 ---------- */
.page-contact .contact-block--flow {
  position: relative;
}

.page-contact .contact-block__figure {
  margin: 0 0 clamp(26px, 3.6vw, 42px);
  border-radius: var(--radius-m);
  overflow: hidden;
  border: 1px solid var(--glass-brd);
}

.page-contact .contact-block__figure img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  opacity: 0.78;
}

.page-contact .step-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  counter-reset: pc-step;
}

.page-contact .step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: clamp(16px, 2.4vw, 28px);
  padding: clamp(20px, 2.6vw, 28px);
  border-radius: var(--radius-s);
  background: rgba(28, 58, 48, 0.4);
  border: 1px solid var(--line-soft);
  transition: background 0.25s ease, transform 0.25s ease;
}

.page-contact .step:hover {
  background: rgba(28, 58, 48, 0.72);
  transform: translateX(4px);
}

.page-contact .step__idx {
  margin: 0;
  font-size: clamp(26px, 3.6vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.03em;
}

.page-contact .step__body {
  min-width: 0;
}

.page-contact .step__title {
  margin: 0 0 8px;
  font-size: clamp(18px, 2vw, 21px);
  font-weight: 800;
  color: var(--paper);
  letter-spacing: 0.01em;
}

.page-contact .step__desc {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .step__meta {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  font-size: 13px;
  color: var(--stone);
  padding-top: 12px;
  border-top: 1px dashed var(--line-soft);
}

.page-contact .step__time {
  color: var(--amber);
}

.page-contact .flow-note {
  margin: clamp(20px, 2.6vw, 28px) 0 0;
  padding: 16px 20px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
  background: rgba(184, 87, 66, 0.12);
  border-left: 3px solid var(--clay);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
}

/* ---------- 联系渠道 ---------- */
.page-contact .channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-contact .channel-card {
  padding: clamp(22px, 3vw, 30px);
  border-radius: var(--radius-m);
  background: rgba(28, 58, 48, 0.55);
  border: 1px solid var(--line-soft);
}

.page-contact .channel-card--main {
  background: linear-gradient(155deg, rgba(10, 31, 25, 0.96), rgba(6, 18, 29, 0.96));
  border: 1px solid rgba(70, 240, 190, 0.5);
  box-shadow: 0 0 0 1px rgba(70, 240, 190, 0.08), 0 18px 48px -28px rgba(70, 240, 190, 0.5);
}

.page-contact .channel-card__label {
  margin: 0 0 12px;
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--stone);
}

.page-contact .channel-card__value {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: clamp(17px, 2.4vw, 23px);
  font-weight: 700;
  letter-spacing: -0.01em;
  word-break: break-all;
}

.page-contact .channel-card__value--text {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: clamp(16px, 2vw, 19px);
  word-break: normal;
  color: var(--paper);
}

.page-contact .channel-card__value a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(70, 240, 190, 0.45);
}

.page-contact .channel-card__value a:hover {
  border-bottom-color: var(--cyan);
}

.page-contact .channel-card__hint {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .channel-foot {
  margin: clamp(20px, 2.6vw, 28px) 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--stone);
}

/* ---------- 问答 ---------- */
.page-contact .qa-list {
  display: grid;
  gap: 10px;
}

.page-contact .qa {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-s);
  background: rgba(14, 32, 54, 0.55);
  overflow: hidden;
}

.page-contact .qa[open] {
  border-color: rgba(70, 240, 190, 0.35);
}

.page-contact .qa__q {
  cursor: pointer;
  list-style: none;
  padding: 18px clamp(18px, 2.6vw, 26px);
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
  letter-spacing: 0.01em;
  display: flex;
  gap: 12px;
  align-items: baseline;
}

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

.page-contact .qa__q::before {
  content: "＋";
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--cyan);
  flex: none;
}

.page-contact .qa[open] .qa__q::before {
  content: "－";
}

.page-contact .qa__a {
  padding: 0 clamp(18px, 2.6vw, 26px) 20px;
}

.page-contact .qa__a p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .qa__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(70, 240, 190, 0.4);
}

/* ---------- 收尾 ---------- */
.page-contact .contact-cta {
  border-top: 1px solid var(--line-soft);
}

.page-contact .contact-cta__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3vw, 40px);
  align-items: center;
}

.page-contact .contact-cta__copy h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 3.2vw, 34px);
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--paper);
  margin: 8px 0 12px;
}

.page-contact .contact-cta__copy p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--stone);
  max-width: 52ch;
}

.page-contact .contact-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 中等屏 ---------- */
@media (min-width: 680px) {
  .page-contact .contact-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .dir-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .asset-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .channel-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .channel-card--main {
    grid-column: 1 / -1;
  }

  .page-contact .contact-cta__inner {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
  }

  .page-contact .contact-cta__actions {
    justify-content: flex-end;
  }
}

/* ---------- 桌面：左窄右宽 ---------- */
@media (min-width: 1024px) {
  .page-contact .contact-body__grid {
    grid-template-columns: var(--pc-rail-w) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
  }

  .page-contact .contact-rail {
    display: block;
    position: sticky;
    top: 104px;
    align-self: start;
  }

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

  .page-contact .contact-rail .toc-link {
    display: block;
    padding: 9px 0 9px 14px;
    font-size: 14px;
    color: var(--stone);
    text-decoration: none;
    border-left: 2px solid var(--line-soft);
    transition: color 0.2s ease, border-color 0.2s ease;
  }

  .page-contact .contact-rail .toc-link:hover {
    color: var(--mist);
  }

  .page-contact .contact-rail .toc-link.is-active {
    color: var(--cyan);
    border-left-color: var(--cyan);
  }

  .page-contact .step {
    grid-template-columns: 72px 1fr;
  }
}

/* ---------- 大屏 ---------- */
@media (min-width: 1280px) {
  .page-contact {
    --pc-rail-w: 232px;
  }

  .page-contact .asset-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-contact .channel-card--main {
    grid-column: auto;
    grid-row: span 1;
  }

  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }
}
</PAGE_CSS>>>