.page-contact {
  --ct-lede: #BFD9D0;
  --ct-hair: 1px solid var(--grid-600);
  background: var(--ink-900);
}

/* ---------- 首屏 ---------- */
.page-contact .ct-hero {
  position: relative;
  padding-block: 48px 40px;
  border-bottom: var(--ct-hair);
  overflow: hidden;
}

.page-contact .ct-hero::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 62%;
  background-image: linear-gradient(to right, rgba(30, 74, 60, 0.75) 0 1px, transparent 1px);
  background-size: 25% 100%;
  opacity: 0.42;
  pointer-events: none;
}

.page-contact .ct-hero__rail {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 22px;
}

.page-contact .ct-hero__side {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-contact .ct-hero__eyebrow {
  margin: 0;
}

.page-contact .ct-hero__anno {
  display: none;
  margin: 0;
}

.page-contact .ct-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 8.6vw, 100px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--white-100);
}

.page-contact .ct-hero__lede {
  margin: 22px 0 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ct-lede);
}

.page-contact .ct-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

/* ---------- 章节标题 ---------- */
.page-contact .ct-head {
  display: grid;
  gap: 12px;
  padding-top: 26px;
  border-top: var(--ct-hair);
  margin-bottom: 36px;
}

.page-contact .ct-head .section-index {
  margin: 0;
}

.page-contact .ct-head .section-title {
  margin: 0;
}

.page-contact .ct-head .section-lede {
  margin: 0;
  max-width: 54ch;
}

/* ---------- 合作方向 ---------- */
.page-contact .ct-tracks__grid {
  display: grid;
  gap: 44px;
}

.page-contact .ct-tracks__list {
  display: grid;
}

.page-contact .ct-track {
  display: grid;
  gap: 16px;
  padding: 26px 0;
  border-top: var(--ct-hair);
}

.page-contact .ct-track:last-child {
  border-bottom: var(--ct-hair);
}

.page-contact .ct-track__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
}

.page-contact .ct-track__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--neon-500);
}

.page-contact .ct-track__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 23px;
  line-height: 1.2;
  color: var(--white-100);
}

.page-contact .ct-track__meta {
  margin: 0;
  display: grid;
  gap: 10px;
}

.page-contact .ct-track__meta > div {
  display: grid;
  gap: 4px;
}

.page-contact .ct-track__meta dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted-400);
  text-transform: uppercase;
}

.page-contact .ct-track__meta dd {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--white-100);
}

.page-contact .ct-track__meta dd a {
  color: var(--neon-500);
  text-decoration: none;
  border-bottom: 1px solid rgba(46, 242, 192, 0.35);
}

.page-contact .ct-tracks__figure {
  margin: 0;
  display: grid;
  gap: 12px;
}

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

.page-contact .ct-tracks__figure figcaption {
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted-400);
}

/* ---------- 对接流程 ---------- */
.page-contact .ct-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-contact .ct-steps::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 24px;
  bottom: 24px;
  width: 1px;
  background: linear-gradient(
    to bottom,
    transparent,
    var(--grid-600) 6%,
    var(--grid-600) 94%,
    transparent
  );
}

.page-contact .ct-step {
  position: relative;
}

.page-contact .ct-step__box {
  border-top: var(--ct-hair);
}

.page-contact .ct-step:last-child .ct-step__box {
  border-bottom: var(--ct-hair);
}

.page-contact .ct-step__sum {
  display: grid;
  grid-template-columns: 22px 44px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 22px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-contact .ct-step__dot {
  width: 9px;
  height: 9px;
  justify-self: center;
  background: var(--ink-800);
  border: 1px solid var(--grid-600);
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-contact .ct-step__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--muted-400);
  transition: color 0.2s var(--ease);
}

.page-contact .ct-step__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.25;
  color: var(--white-100);
}

.page-contact .ct-step__time {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted-400);
  white-space: nowrap;
}

.page-contact .ct-step[open] .ct-step__dot {
  background: var(--neon-500);
  border-color: var(--neon-500);
}

.page-contact .ct-step[open] .ct-step__num {
  color: var(--neon-500);
}

.page-contact .ct-step__body {
  display: grid;
  gap: 14px;
  padding: 0 0 26px 22px;
}

.page-contact .ct-step__body p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ct-lede);
}

.page-contact .ct-step__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 6px;
}

.page-contact .ct-step__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted-400);
}

.page-contact .ct-step__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 9px;
  height: 1px;
  background: var(--grid-600);
}

/* ---------- 联系方式 ---------- */
.page-contact .ct-reach {
  margin: 0;
  display: grid;
}

.page-contact .ct-reach__row {
  display: grid;
  gap: 8px;
  padding: 20px 0;
  border-top: var(--ct-hair);
}

.page-contact .ct-reach__row:last-child {
  border-bottom: var(--ct-hair);
}

.page-contact .ct-reach__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted-400);
}

.page-contact .ct-reach__val {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(17px, 4.6vw, 30px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--white-100);
  overflow-wrap: anywhere;
}

.page-contact .ct-reach__val--text {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: clamp(17px, 4.2vw, 26px);
  letter-spacing: 0;
  line-height: 1.4;
}

.page-contact .ct-reach__note {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin: 26px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted-400);
}

.page-contact .ct-reach__more {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted-400);
}

.page-contact .ct-reach__more a {
  color: var(--neon-500);
  text-decoration: none;
  border-bottom: 1px solid rgba(46, 242, 192, 0.35);
}

/* ---------- 常见问题 ---------- */
.page-contact .ct-faq__list {
  display: grid;
}

.page-contact .ct-faq__item {
  display: grid;
  gap: 10px;
  padding: 24px 0;
  border-top: var(--ct-hair);
}

.page-contact .ct-faq__item:last-child {
  border-bottom: var(--ct-hair);
}

.page-contact .ct-faq__q {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.35;
  color: var(--white-100);
}

.page-contact .ct-faq__a {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ct-lede);
}

/* ---------- 收束 ---------- */
.page-contact .ct-outro {
  position: relative;
}

.page-contact .ct-outro__fig {
  margin: 0;
  position: relative;
  overflow: hidden;
}

.page-contact .ct-outro__fig::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    var(--ink-900) 0%,
    rgba(4, 18, 14, 0.2) 46%,
    rgba(4, 18, 14, 0.88) 100%
  );
  pointer-events: none;
}

.page-contact .ct-outro__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1400 / 900;
  object-fit: cover;
}

.page-contact .ct-outro__foot {
  display: grid;
  gap: 18px;
  padding-block: 30px 52px;
}

.page-contact .ct-outro__rule {
  display: block;
  width: 24%;
  height: 1px;
  background: var(--neon-500);
}

.page-contact .ct-outro__sign {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted-400);
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-contact .ct-track__meta > div {
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }

  .page-contact .ct-track__meta dt {
    padding-top: 4px;
  }

  .page-contact .ct-step__body {
    padding-left: 78px;
  }
}

@media (min-width: 860px) {
  .page-contact .ct-hero {
    padding-block: 88px 68px;
  }

  .page-contact .ct-hero__rail {
    grid-template-columns: minmax(120px, 3fr) minmax(0, 9fr);
    column-gap: 48px;
    align-items: start;
  }

  .page-contact .ct-hero__anno {
    display: block;
    margin-top: 32px;
  }

  .page-contact .ct-head {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    column-gap: 48px;
    margin-bottom: 56px;
  }

  .page-contact .ct-head .section-index {
    grid-column: 1;
  }

  .page-contact .ct-head .section-title,
  .page-contact .ct-head .section-lede {
    grid-column: 2;
  }

  .page-contact .ct-reach__row {
    grid-template-columns: 170px minmax(0, 1fr);
    column-gap: 40px;
    align-items: baseline;
    padding: 24px 0;
  }

  .page-contact .ct-faq__item {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    column-gap: 48px;
    align-items: start;
    padding: 28px 0;
  }
}

@media (min-width: 1024px) {
  .page-contact .ct-tracks__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    column-gap: 56px;
    align-items: start;
  }

  .page-contact .ct-tracks__figure {
    position: sticky;
    top: calc(var(--header-h) + 40px);
  }

  .page-contact .ct-step__name {
    font-size: 21px;
  }
}