.page-contact {
  --ct-rule: 1px solid var(--line-soft);
  --ct-radius: 2px;
}

.page-contact .breadcrumbs {
  margin: 22px 0 0;
}

/* ---------- Hero ---------- */
.page-contact .ct-hero {
  padding: 34px 0 56px;
}

.page-contact .ct-hero__intro {
  max-width: 66ch;
}

.page-contact .ct-hero__title,
.page-contact h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(34px, 6vw, 68px);
  line-height: 1.02;
  letter-spacing: -0.01em;
  color: var(--white);
  margin: 14px 0 18px;
}

.page-contact .ct-hero__lede {
  color: var(--mist);
  font-size: 17px;
  line-height: 1.85;
  max-width: 46ch;
  margin: 0;
}

.page-contact .ct-hero__grid {
  display: flex;
  flex-direction: column;
  gap: 32px;
  margin-top: 38px;
}

.page-contact .ct-hero__sub {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--cyan-soft);
  margin: 0 0 18px;
  padding-bottom: 10px;
  border-bottom: var(--ct-rule);
}

.page-contact .ct-hero__aside {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.page-contact .ct-contact-panel {
  order: 1;
}

.page-contact .ct-shot {
  order: 2;
}

/* ---------- 流程时间轴 ---------- */
.page-contact .ct-flow {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  position: relative;
}

.page-contact .ct-flow::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(47, 227, 210, 0.25) 62%, var(--orange) 100%);
}

.page-contact .ct-flow__item {
  position: relative;
  padding-bottom: 24px;
}

.page-contact .ct-flow__item:last-child {
  padding-bottom: 0;
}

.page-contact .ct-flow__item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 5px;
  width: 11px;
  height: 11px;
  background: var(--ink-900);
  border: 1px solid var(--cyan);
  border-radius: var(--ct-radius);
}

.page-contact .ct-flow__item:nth-child(4)::before {
  border-color: var(--orange);
}

.page-contact .ct-flow__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-contact .ct-flow__name {
  display: block;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.005em;
  color: var(--white);
  margin: 3px 0 6px;
}

.page-contact .ct-flow__meta {
  color: var(--graphite);
  font-size: 13.5px;
  line-height: 1.72;
  margin: 0;
  max-width: 40ch;
}

/* ---------- 联系信息面板 ---------- */
.page-contact .ct-contact-panel {
  border: 1px solid var(--line);
  border-radius: var(--ct-radius);
  background: var(--ink-800);
  padding: 22px 20px;
  position: relative;
}

.page-contact .ct-contact-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 34px;
  height: 34px;
  border-top: 2px solid var(--cyan);
  border-left: 2px solid var(--cyan);
}

.page-contact .ct-contact-panel__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding-bottom: 14px;
  margin-bottom: 6px;
  border-bottom: var(--ct-rule);
}

.page-contact .ct-contact-panel__head .panel__title {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  color: var(--white);
  margin: 0;
}

.page-contact .ct-channel {
  padding: 14px 0;
  border-bottom: var(--ct-rule);
}

.page-contact .ct-channel:last-child {
  border-bottom: 0;
  padding-bottom: 2px;
}

.page-contact .ct-channel__label {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan-soft);
  margin: 0 0 6px;
}

.page-contact .ct-channel__value {
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--white);
  margin: 0 0 6px;
  word-break: break-word;
}

.page-contact .ct-channel__note {
  color: var(--graphite);
  font-size: 13.5px;
  line-height: 1.72;
  margin: 0;
}

/* ---------- 图片说明 ---------- */
.page-contact .ct-shot__cap {
  display: block;
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--graphite);
}

/* ---------- 通用区块 ---------- */
.page-contact .ct-section {
  padding: 52px 0;
  border-top: var(--ct-rule);
}

.page-contact .ct-section__head {
  max-width: 64ch;
  margin-bottom: 30px;
}

.page-contact .ct-section__head--tight {
  margin-bottom: 22px;
}

.page-contact .ct-section__head h2,
.page-contact .ct-prep__left h2,
.page-contact .ct-feedback__intro h2,
.page-contact .ct-cta__text h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--white);
  margin: 12px 0 14px;
}

.page-contact .ct-section__lede {
  color: var(--mist);
  font-size: 16px;
  line-height: 1.85;
  margin: 0;
}

/* ---------- 分段切换：三类合作方向 ---------- */
.page-contact .ct-tabs__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-bottom: var(--ct-rule);
  margin-bottom: 26px;
}

.page-contact .ct-tabs__nav .tabs__btn {
  appearance: none;
  background: transparent;
  border: 1px solid transparent;
  border-bottom: 2px solid transparent;
  color: var(--graphite);
  font-family: var(--font-body);
  font-size: 15px;
  letter-spacing: 0.02em;
  min-height: 44px;
  padding: 10px 16px;
  cursor: pointer;
  border-radius: 0;
  transition: color 160ms var(--ease), border-color 160ms var(--ease), background-color 160ms var(--ease);
}

.page-contact .ct-tabs__nav .tabs__btn:hover {
  color: var(--mist);
}

.page-contact .ct-tabs__nav .tabs__btn[aria-selected="true"] {
  color: var(--white);
  background: var(--ink-800);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
  border-bottom: 2px solid var(--cyan);
}

.page-contact .ct-tabs__nav .tabs__btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-contact .tabs__panel {
  animation: none;
}

.page-contact .tabs__panel[hidden] {
  display: none;
}

.page-contact .ct-dir {
  display: flex;
  flex-direction: column;
  gap: 26px;
  border: 1px solid var(--line);
  border-radius: var(--ct-radius);
  background: var(--ink-800);
  padding: 24px 20px;
}

.page-contact .ct-dir__lead {
  font-size: 17px;
  line-height: 1.75;
  color: var(--white);
  margin: 0 0 12px;
  font-weight: 500;
}

.page-contact .ct-dir__main p {
  color: var(--mist);
  font-size: 15.5px;
  line-height: 1.85;
  margin: 0;
}

.page-contact .ct-dir__facts {
  margin: 0;
  display: grid;
  gap: 0;
  border-top: var(--ct-rule);
}

.page-contact .ct-dir__fact {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 14px 0;
  border-bottom: var(--ct-rule);
}

.page-contact .ct-dir__fact:last-child {
  border-bottom: 0;
  padding-bottom: 2px;
}

.page-contact .ct-dir__fact dt {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan-soft);
}

.page-contact .ct-dir__fact dd {
  margin: 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.75;
}

/* ---------- 对接准备 ---------- */
.page-contact .ct-prep {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.page-contact .ct-prep__shot {
  margin: 26px 0 0;
}

.page-contact .ct-step {
  border: 1px solid var(--line);
  border-left: 2px solid var(--line);
  border-radius: var(--ct-radius);
  background: var(--ink-800);
  margin-bottom: 10px;
  transition: border-color 160ms var(--ease), background-color 160ms var(--ease);
}

.page-contact .ct-step:last-child {
  margin-bottom: 0;
}

.page-contact .ct-step[open] {
  background: var(--ink-700);
  border-left-color: var(--cyan);
}

.page-contact .ct-step__sum {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 16px;
  min-height: 44px;
  cursor: pointer;
  list-style: none;
}

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

.page-contact .ct-step__sum::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
}

.page-contact .ct-step[open] .ct-step__sum::after {
  content: "\2212";
}

.page-contact .ct-step__sum:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-contact .ct-step__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-contact .ct-step__title {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  color: var(--white);
}

.page-contact .ct-step__body {
  padding: 0 16px 18px 16px;
  border-top: var(--ct-rule);
  margin-top: 2px;
  padding-top: 14px;
}

.page-contact .ct-step__body > p {
  color: var(--mist);
  font-size: 15px;
  line-height: 1.8;
  margin: 0 0 12px;
}

.page-contact .ct-step__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .ct-step__list li {
  position: relative;
  padding: 0 0 10px 18px;
  color: var(--mist);
  font-size: 14.5px;
  line-height: 1.78;
}

.page-contact .ct-step__list li:last-child {
  padding-bottom: 0;
}

.page-contact .ct-step__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 7px;
  background: var(--cyan);
  opacity: 0.7;
}

/* ---------- 读者反馈 ---------- */
.page-contact .ct-feedback__lede {
  color: var(--mist);
  font-size: 16px;
  line-height: 1.85;
  margin: 0 0 28px;
  max-width: 62ch;
}

.page-contact .ct-feedback__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: var(--ct-rule);
}

.page-contact .ct-feedback__cell {
  padding: 20px 0;
  border-bottom: var(--ct-rule);
}

.page-contact .ct-feedback__idx {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--orange);
  border: 1px solid rgba(255, 122, 31, 0.45);
  padding: 2px 8px;
  margin-bottom: 10px;
}

.page-contact .ct-feedback__title {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  color: var(--white);
  margin: 0 0 8px;
}

.page-contact .ct-feedback__cell p {
  color: var(--mist);
  font-size: 14.5px;
  line-height: 1.78;
  margin: 0;
}

.page-contact .ct-feedback__foot {
  margin: 26px 0 0;
  padding: 16px 18px;
  border-left: 2px solid var(--cyan);
  background: var(--ink-800);
  color: var(--mist);
  font-size: 15px;
  line-height: 1.8;
}

.page-contact .ct-feedback__mail {
  font-family: var(--font-mono);
  color: var(--cyan);
  word-break: break-word;
}

/* ---------- 常见问题 ---------- */
.page-contact .ct-faq {
  max-width: 940px;
}

.page-contact .ct-faq__item {
  border-bottom: var(--ct-rule);
}

.page-contact .ct-faq__sum {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 18px 40px 18px 0;
  cursor: pointer;
  list-style: none;
  position: relative;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  color: var(--white);
  line-height: 1.35;
}

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

.page-contact .ct-faq__sum::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--cyan);
}

.page-contact .ct-faq__item[open] .ct-faq__sum::after {
  content: "\2212";
}

.page-contact .ct-faq__sum:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-contact .ct-faq__body {
  padding: 0 40px 22px 0;
}

.page-contact .ct-faq__body p {
  color: var(--mist);
  font-size: 15px;
  line-height: 1.85;
  margin: 0;
  max-width: 60ch;
}

/* ---------- 收尾 ---------- */
.page-contact .ct-cta {
  padding: 46px 0 72px;
  border-top: var(--ct-rule);
  background:
    linear-gradient(135deg, rgba(47, 227, 210, 0.07) 0%, rgba(4, 16, 29, 0) 46%, rgba(255, 122, 31, 0.06) 100%);
}

.page-contact .ct-cta__inner {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.page-contact .ct-cta__text h2 {
  margin-top: 0;
}

.page-contact .ct-cta__text p {
  color: var(--mist);
  font-size: 16px;
  line-height: 1.85;
  margin: 0;
  max-width: 52ch;
}

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

.page-contact .ct-cta__actions .btn {
  border-radius: var(--ct-radius);
  min-height: 44px;
}

/* ---------- 桌面 ---------- */
@media (min-width: 720px) {
  .page-contact .ct-section {
    padding: 68px 0;
  }

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

  .page-contact .ct-dir__fact {
    grid-template-columns: 132px 1fr;
    gap: 18px;
    align-items: baseline;
  }

  .page-contact .ct-dir__fact dt {
    padding-top: 3px;
  }

  .page-contact .ct-feedback__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    border-bottom: var(--ct-rule);
  }

  .page-contact .ct-feedback__cell {
    padding: 24px 22px 24px 0;
    border-bottom: 0;
    border-right: var(--ct-rule);
  }

  .page-contact .ct-feedback__cell:nth-child(3n) {
    border-right: 0;
    padding-right: 0;
  }

  .page-contact .ct-feedback__cell:not(:nth-child(3n + 1)) {
    padding-left: 22px;
  }

  .page-contact .ct-cta__inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
  }

  .page-contact .ct-cta__actions {
    flex: 0 0 auto;
  }
}

@media (min-width: 900px) {
  .page-contact .ct-hero {
    padding: 44px 0 72px;
  }

  .page-contact .ct-hero__grid {
    flex-direction: row;
    align-items: flex-start;
    gap: 48px;
    margin-top: 46px;
  }

  .page-contact .ct-hero__timeline {
    flex: 0 0 36%;
    max-width: 36%;
  }

  .page-contact .ct-hero__aside {
    flex: 1 1 auto;
    min-width: 0;
    gap: 24px;
  }

  .page-contact .ct-contact-panel,
  .page-contact .ct-shot {
    order: 0;
  }

  .page-contact .ct-contact-panel {
    padding: 26px 24px;
  }

  .page-contact .ct-prep {
    flex-direction: row;
    align-items: flex-start;
    gap: 52px;
  }

  .page-contact .ct-prep__left {
    flex: 0 0 37%;
    max-width: 37%;
    position: sticky;
    top: 28px;
  }

  .page-contact .ct-prep__right {
    flex: 1 1 auto;
    min-width: 0;
  }

  .page-contact .ct-step__sum {
    padding: 17px 20px;
  }

  .page-contact .ct-step__body {
    padding: 16px 20px 20px 60px;
  }
}

@media (min-width: 1180px) {
  .page-contact .ct-hero__timeline {
    flex: 0 0 32%;
    max-width: 32%;
  }

  .page-contact .ct-dir {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 380px);
    gap: 40px;
    align-items: start;
  }

  .page-contact .ct-dir__facts {
    border-top: 0;
    border-left: var(--ct-rule);
    padding-left: 32px;
  }

  .page-contact .ct-dir__fact {
    grid-template-columns: 1fr;
    gap: 5px;
  }

  .page-contact .ct-prep__left {
    flex: 0 0 34%;
    max-width: 34%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .ct-tabs__nav .tabs__btn,
  .page-contact .ct-step {
    transition: none;
  }
}