.page-contact {
  --pc-line: rgba(42, 74, 99, 0.62);
  --pc-line-dark: rgba(5, 9, 15, 0.18);
  --pc-panel: linear-gradient(158deg, rgba(23, 56, 79, 0.92) 0%, rgba(11, 27, 43, 0.96) 100%);
}

.page-contact .breadcrumbs {
  padding-top: 20px;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  display: grid;
  gap: 28px;
  padding: 18px 0 48px;
  background-image: radial-gradient(58% 62% at 86% 4%, rgba(255, 106, 19, 0.16), transparent 72%);
  background-repeat: no-repeat;
}

.page-contact .contact-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(38px, 8.4vw, 74px);
  line-height: 0.96;
  letter-spacing: -0.02em;
  color: var(--bone);
}

.page-contact .contact-hero__title span {
  display: block;
  padding-left: 0.12em;
}

.page-contact .contact-hero__lead {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: 17px;
  line-height: 1.85;
  color: var(--stone);
}

.page-contact .quick-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.page-contact .quick-list li {
  border-left: 2px solid var(--steel);
  padding: 4px 0 4px 12px;
}

.page-contact .quick-list__key {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--stone);
}

.page-contact .quick-list__val {
  display: block;
  margin-top: 5px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.5;
  color: var(--bone);
  word-break: break-word;
}

.page-contact .contact-hero__media {
  margin: 0;
  border: 1px solid var(--pc-line);
  border-radius: 2px 18px 2px 18px;
  overflow: hidden;
  background: var(--lane);
}

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

.page-contact .contact-hero__media .media__caption {
  padding: 10px 14px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--stone);
  background: rgba(5, 9, 15, 0.55);
}

/* ---------- 两栏主体 ---------- */
.page-contact .contact-split__inner {
  display: grid;
  gap: 36px;
}

.page-contact .reach-card {
  padding: 24px 22px 26px;
  border: 1px solid var(--pc-line);
  border-left: 3px solid var(--orange);
  border-radius: 2px 16px 16px 2px;
  background: var(--pc-panel);
}

.page-contact .reach-card__title {
  margin: 6px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 26px;
  letter-spacing: -0.01em;
  color: var(--bone);
}

.page-contact .reach-list {
  margin: 20px 0 0;
}

.page-contact .reach-row {
  padding: 13px 0;
  border-top: 1px dashed var(--pc-line);
}

.page-contact .reach-row:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-contact .reach-row dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--stone);
}

.page-contact .reach-row dd {
  margin: 6px 0 0;
  font-size: 19px;
  line-height: 1.55;
  color: var(--bone);
  word-break: break-word;
}

.page-contact .reach-note {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--stone);
}

.page-contact .reach-note a,
.page-contact .checklist__foot a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 255, 61, 0.45);
}

/* ---------- 合作方向 ---------- */
.page-contact .contact-main {
  display: grid;
  gap: 72px;
}

.page-contact .coop__intro {
  margin: 12px 0 0;
  max-width: 52ch;
  color: var(--stone);
}

.page-contact .coop-grid {
  display: grid;
  gap: 16px;
  margin-top: 26px;
}

.page-contact .coop-card {
  padding: 20px 20px 22px;
  border: 1px solid var(--pc-line);
  border-radius: 12px 2px 12px 2px;
  background: rgba(23, 56, 79, 0.46);
  transition: transform 180ms var(--ease), border-color 180ms var(--ease);
}

.page-contact .coop-card:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 106, 19, 0.55);
}

.page-contact .coop-card h3 {
  margin: 14px 0 0;
  font-size: 21px;
  line-height: 1.4;
  color: var(--bone);
}

.page-contact .coop-card p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--stone);
}

.page-contact .coop-details {
  margin-top: 16px;
  border-top: 1px solid var(--pc-line);
  padding-top: 12px;
}

.page-contact .coop-details summary {
  list-style: none;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--lime);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

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

.page-contact .coop-details summary::after {
  content: "+";
  font-size: 16px;
  line-height: 1;
  color: var(--stone);
  transition: transform 180ms var(--ease);
}

.page-contact .coop-details[open] summary::after {
  transform: rotate(45deg);
}

.page-contact .coop-details ul {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-contact .coop-details li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--stone);
}

.page-contact .coop-details li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 1px;
  background: var(--orange);
}

/* ---------- 来信清单 ---------- */
.page-contact .checklist-block .prose {
  margin: 12px 0 0;
  max-width: 52ch;
  color: var(--stone);
}

.page-contact .checklist {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
}

.page-contact .checklist__item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 12px;
  padding: 16px 8px 16px 0;
  border-top: 1px solid var(--pc-line);
  transition: background-color 160ms var(--ease);
}

.page-contact .checklist__item:last-child {
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .checklist__item:hover {
  background: rgba(198, 255, 61, 0.05);
}

.page-contact .checklist__mark {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--orange);
  padding-top: 3px;
  transition: color 160ms var(--ease);
}

.page-contact .checklist__item:hover .checklist__mark {
  color: var(--lime);
}

.page-contact .checklist__item h3 {
  margin: 0;
  font-size: 17px;
  line-height: 1.5;
  color: var(--bone);
}

.page-contact .checklist__item p {
  margin: 6px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--stone);
}

.page-contact .checklist__foot {
  margin: 20px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--stone);
}

/* ---------- 流程（浅色区块） ---------- */
.page-contact .process {
  --pc-line-dark: rgba(5, 9, 15, 0.16);
  padding: 56px 0 60px;
  background: var(--bone);
  color: var(--ink);
  border-top: 1px solid rgba(5, 9, 15, 0.08);
  border-bottom: 1px solid rgba(5, 9, 15, 0.08);
}

.page-contact .process .eyebrow {
  color: var(--clay);
}

.page-contact .process .section-title {
  color: var(--ink);
}

.page-contact .process__grid {
  display: grid;
  gap: 24px;
  margin-top: 14px;
}

.page-contact .process__intro {
  margin: 0;
  max-width: 44ch;
  color: rgba(5, 9, 15, 0.74);
}

.page-contact .process__media {
  margin: 0;
  border: 1px solid var(--pc-line-dark);
  border-radius: 2px;
  overflow: hidden;
  background: var(--lane);
}

.page-contact .process__media .media__caption {
  padding: 10px 14px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--bone);
  background: var(--deep);
}

.page-contact .steps {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-contact .step {
  position: relative;
  padding: 8px 0 22px 34px;
}

.page-contact .step::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 22px;
  bottom: 0;
  width: 1px;
  background: var(--pc-line-dark);
}

.page-contact .step:last-child::before {
  display: none;
}

.page-contact .step::after {
  content: "";
  position: absolute;
  left: 0;
  top: 15px;
  width: 9px;
  height: 9px;
  border: 2px solid var(--clay);
  border-radius: 50%;
  background: var(--bone);
}

.page-contact .step__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--clay);
}

.page-contact .step h3 {
  margin: 6px 0 0;
  font-size: 18px;
  line-height: 1.4;
  color: var(--ink);
}

.page-contact .step p {
  margin: 6px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(5, 9, 15, 0.72);
}

/* ---------- 来访 ---------- */
.page-contact .visit__inner {
  display: grid;
  gap: 28px;
}

.page-contact .visit__lead .section-title {
  margin-top: 8px;
}

.page-contact .visit__lead .prose {
  margin: 14px 0 0;
  max-width: 34ch;
  color: var(--stone);
}

.page-contact .visit-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .visit-list li {
  display: grid;
  gap: 6px;
  padding: 14px 0;
  border-top: 1px solid var(--pc-line);
}

.page-contact .visit-list li:last-child {
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .visit-list__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--stone);
}

.page-contact .visit-list p {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--bone);
}

.page-contact .visit__note {
  margin: 18px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--moss);
  font-size: 14px;
  line-height: 1.8;
  color: var(--stone);
}

.page-contact .visit__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .process__grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-contact .checklist__item {
    grid-template-columns: 52px minmax(0, 1fr);
    gap: 16px;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: 40px 48px;
    padding: 26px 0 76px;
  }

  .page-contact .contact-hero__media {
    transform: translateY(26px);
  }

  .page-contact .contact-split__inner {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 56px;
    align-items: start;
  }

  .page-contact .reach-card {
    position: sticky;
    top: calc(var(--bar-h) + 28px);
  }

  .page-contact .coop-grid {
    grid-template-columns: 1.12fr 1fr 0.94fr;
    align-items: start;
  }

  .page-contact .coop-card:nth-child(2) {
    margin-top: 28px;
  }

  .page-contact .coop-card:nth-child(3) {
    margin-top: 12px;
  }

  .page-contact .process {
    padding: 88px 0 96px;
  }

  .page-contact .process__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    align-items: end;
    gap: 40px;
    margin-top: 24px;
  }

  .page-contact .steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0 28px;
    margin-top: 48px;
  }

  .page-contact .step {
    padding: 28px 0 6px;
  }

  .page-contact .step::before {
    left: 0;
    top: 0;
    bottom: auto;
    width: 100%;
    height: 1px;
  }

  .page-contact .step:last-child::before {
    display: block;
  }

  .page-contact .step::after {
    top: -5px;
  }

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

@media (min-width: 1200px) {
  .page-contact .contact-hero {
    gap: 48px 64px;
  }

  .page-contact .contact-hero__lead {
    font-size: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .coop-card,
  .page-contact .checklist__item,
  .page-contact .coop-details summary::after {
    transition: none;
  }

  .page-contact .coop-card:hover {
    transform: none;
  }

  .page-contact .contact-hero__media {
    transform: none;
  }
}