/* ============ 商务合作页 · page-contact ============ */

.page-contact img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ---------- 首屏 ---------- */
.page-contact .ct-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(36px, 6vw, 76px) 0 clamp(44px, 7vw, 92px);
  border-bottom: 1px solid var(--line);
}

.page-contact .ct-hero::before {
  content: "";
  position: absolute;
  top: -22%;
  right: -12%;
  width: min(62vw, 720px);
  height: min(62vw, 720px);
  background: radial-gradient(circle, rgba(46, 139, 118, .22), transparent 66%);
  pointer-events: none;
}

.page-contact .ct-hero .wrap {
  position: relative;
}

.page-contact .ct-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 5vw, 64px);
  margin-top: clamp(26px, 4vw, 48px);
}

.page-contact .ct-hero__main {
  position: relative;
  border-left: 2px solid var(--vermilion);
  padding-left: clamp(16px, 2.2vw, 30px);
}

.page-contact .ct-hero__main::before {
  content: "";
  position: absolute;
  left: -2px;
  top: 0;
  width: 2px;
  height: 60px;
  background: var(--gold);
}

.page-contact .ct-hero__title {
  margin: 0 0 clamp(16px, 2vw, 24px);
  font-size: clamp(38px, 6.4vw, 80px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--limestone);
}

.page-contact .ct-hero__lead {
  max-width: 36em;
  color: var(--mist);
  font-size: clamp(15px, 1.35vw, 17px);
  line-height: 1.9;
}

.page-contact .ct-hero__side {
  border-top: 1px solid var(--line-strong);
  padding-top: clamp(18px, 2.4vw, 26px);
}

.page-contact .ct-hero__facts {
  list-style: none;
  margin: 0 0 clamp(22px, 3vw, 30px);
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .ct-hero__facts li {
  display: grid;
  grid-template-columns: minmax(44px, auto) 1fr;
  gap: 14px;
  align-items: baseline;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .ct-hero__facts .mono {
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 500;
  letter-spacing: .02em;
  color: var(--gold);
}

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

/* ---------- 01 合作线 ---------- */
.page-contact .ct-tracks {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 34px);
  margin-top: clamp(28px, 4vw, 46px);
}

.page-contact .ct-track {
  position: relative;
  background: rgba(10, 26, 28, .44);
  border: 1px solid var(--line);
  border-top: 2px solid var(--karst);
  padding: clamp(20px, 2.6vw, 30px);
  transition: border-color .18s var(--ease), border-top-color .18s var(--ease);
}

.page-contact .ct-track:hover,
.page-contact .ct-track:focus-within {
  border-color: var(--line-strong);
  border-top-color: var(--vermilion);
}

.page-contact .ct-track__num {
  display: inline-block;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--gold);
  margin-bottom: 12px;
}

.page-contact .ct-track__title {
  margin: 0 0 10px;
  font-size: clamp(19px, 2vw, 23px);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--limestone);
}

.page-contact .ct-track__for {
  margin: 0 0 12px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--light-teal);
}

.page-contact .ct-track__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-contact .ct-track__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-contact .ct-track__list li {
  position: relative;
  padding-left: 18px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .ct-track__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .74em;
  width: 8px;
  height: 1px;
  background: var(--live);
}

.page-contact .ct-tracks__figure {
  margin: clamp(30px, 4.4vw, 50px) 0 0;
}

/* ---------- 02 洽谈流程 ---------- */
.page-contact .ct-steps {
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3vw, 30px);
}

.page-contact .ct-step {
  position: relative;
  padding-top: 24px;
  border-top: 1px solid var(--line-strong);
}

.page-contact .ct-step::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 36px;
  height: 2px;
  background: var(--gold);
}

.page-contact .ct-step:first-child::before {
  background: var(--vermilion);
}

.page-contact .ct-step__num {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--gold);
  margin-bottom: 10px;
}

.page-contact .ct-step__title {
  margin: 0 0 10px;
  font-size: clamp(17px, 1.8vw, 20px);
  font-weight: 700;
  color: var(--limestone);
}

.page-contact .ct-step__text {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-contact .ct-step__meta {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--light-teal);
  border: 1px solid var(--line-strong);
  padding: 3px 9px;
}

/* ---------- 03 联系卡片 ---------- */
.page-contact .ct-contact {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.6vw, 42px);
  margin-top: clamp(28px, 4vw, 46px);
}

.page-contact .ct-cards {
  display: grid;
  gap: 12px;
}

.page-contact .ct-card {
  display: flex;
  align-items: flex-start;
  gap: clamp(14px, 2vw, 22px);
  padding: clamp(18px, 2.4vw, 26px);
  background: rgba(10, 26, 28, .55);
  border: 1px solid var(--line);
  transition: border-color .18s var(--ease);
}

.page-contact .ct-card:hover {
  border-color: var(--gold-line);
}

.page-contact .ct-card__icon {
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  margin-top: 2px;
  color: var(--gold);
}

.page-contact .ct-card__body {
  min-width: 0;
}

.page-contact .ct-card__label {
  margin: 0 0 8px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .16em;
  color: var(--mist);
}

.page-contact .ct-card__value {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: clamp(14px, 1.5vw, 17px);
  line-height: 1.5;
  letter-spacing: .01em;
  color: var(--limestone);
  word-break: break-word;
}

.page-contact .ct-card__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

.page-contact .ct-contact__figure {
  margin: 0;
  align-self: start;
}

/* ---------- 04 回复节奏 ---------- */
.page-contact .ct-rhythm {
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.page-contact .ct-rhythm > li {
  padding: clamp(20px, 2.6vw, 26px) 0;
  border-top: 1px solid var(--line);
}

.page-contact .ct-rhythm > li:first-child {
  border-top: 2px solid var(--vermilion);
}

.page-contact .ct-rhythm__stamp {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gold);
  border: 1px solid var(--gold-line);
  padding: 3px 9px;
  margin-bottom: 14px;
}

.page-contact .ct-rhythm__title {
  margin: 0 0 10px;
  font-size: clamp(16px, 1.7vw, 19px);
  font-weight: 700;
  color: var(--limestone);
}

.page-contact .ct-rhythm__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 05 常见问题 ---------- */
.page-contact .ct-faq {
  margin-top: clamp(28px, 4vw, 44px);
  border-top: 1px solid var(--line);
}

.page-contact .ct-faq__item {
  border-bottom: 1px solid var(--line);
}

.page-contact .ct-faq__q {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: start;
  gap: clamp(12px, 2vw, 20px);
  padding: clamp(18px, 2.4vw, 24px) 0;
  cursor: pointer;
  list-style: none;
  font-size: clamp(15px, 1.6vw, 18px);
  font-weight: 600;
  line-height: 1.6;
  color: var(--limestone);
  transition: color .18s var(--ease);
}

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

.page-contact .ct-faq__q:hover {
  color: var(--light-teal);
}

.page-contact .ct-faq__mark {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gold);
  padding-top: 5px;
}

.page-contact .ct-faq__toggle {
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 6px;
  flex: 0 0 auto;
}

.page-contact .ct-faq__toggle::before,
.page-contact .ct-faq__toggle::after {
  content: "";
  position: absolute;
  background: var(--live);
  transition: transform .2s var(--ease), opacity .2s var(--ease);
}

.page-contact .ct-faq__toggle::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 1.5px;
}

.page-contact .ct-faq__toggle::after {
  left: 6px;
  top: 0;
  width: 1.5px;
  height: 14px;
}

.page-contact .ct-faq__item[open] .ct-faq__toggle::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-contact .ct-faq__item[open] .ct-faq__toggle::before {
  background: var(--vermilion);
}

.page-contact .ct-faq__a {
  padding: 0 0 clamp(20px, 2.6vw, 28px);
  padding-left: clamp(0px, 3vw, 42px);
  padding-right: clamp(0px, 3vw, 60px);
}

.page-contact .ct-faq__a p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--mist);
}

/* ---------- 结尾入口 ---------- */
.page-contact .ct-outro {
  border-top: 1px solid var(--line-strong);
  padding: clamp(40px, 6vw, 76px) 0 clamp(48px, 7vw, 88px);
}

.page-contact .ct-outro__note {
  margin: 0 0 clamp(22px, 3vw, 32px);
  max-width: 40em;
  font-size: 15px;
  line-height: 1.9;
  color: var(--mist);
}

.page-contact .ct-outro__note a {
  color: var(--light-teal);
  border-bottom: 1px solid var(--line-strong);
  text-decoration: none;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-contact .ct-outro__note a:hover {
  color: var(--gold);
  border-color: var(--gold);
}

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

/* ---------- 进入动效（渐进增强） ---------- */
@keyframes ct-rise {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-contact [data-reveal].is-in {
  animation: ct-rise .3s var(--ease) both;
}

/* ---------- 响应式 ---------- */
@media (min-width: 768px) {
  .page-contact .ct-tracks {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .ct-track:nth-child(even) {
    margin-top: clamp(20px, 3vw, 40px);
  }

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

  .page-contact .ct-rhythm > li {
    padding-right: clamp(18px, 2.4vw, 28px);
  }

  .page-contact .ct-rhythm > li:nth-child(even) {
    border-left: 1px solid var(--line);
    padding-left: clamp(18px, 2.4vw, 28px);
    padding-right: 0;
  }
}

@media (min-width: 900px) {
  .page-contact .ct-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
  }

  .page-contact .ct-step {
    padding: 26px clamp(14px, 1.8vw, 24px) 0;
  }

  .page-contact .ct-step + .ct-step {
    border-left: 1px solid var(--line);
  }

  .page-contact .ct-step:first-child {
    padding-left: 0;
  }

  .page-contact .ct-step:last-child {
    padding-right: 0;
  }

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

  .page-contact .ct-rhythm > li {
    border-top: 2px solid var(--karst);
    padding: clamp(22px, 2.6vw, 32px) clamp(16px, 2vw, 26px) 10px;
  }

  .page-contact .ct-rhythm > li:first-child {
    border-top-color: var(--vermilion);
    padding-left: 0;
  }

  .page-contact .ct-rhythm > li:last-child {
    padding-right: 0;
  }
}

@media (min-width: 960px) {
  .page-contact .ct-hero__grid {
    grid-template-columns: 7fr 5fr;
    align-items: end;
  }

  .page-contact .ct-contact {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact [data-reveal].is-in {
    animation: none;
  }

  .page-contact .ct-track,
  .page-contact .ct-card,
  .page-contact .ct-faq__toggle::before,
  .page-contact .ct-faq__toggle::after,
  .page-contact .ct-faq__q {
    transition: none;
  }
}