.page-contact {
  --pc-line: rgba(127, 233, 216, .16);
  --pc-line-soft: rgba(183, 198, 222, .13);
  --pc-rail: 380px;
  --pc-space: clamp(26px, 4vw, 56px);
  background: var(--ink-900);
  color: var(--slate-300);
  font-family: var(--font-body);
}

.page-contact .contact-crumb {
  padding-top: calc(var(--header-h) + clamp(16px, 2vw, 28px));
  padding-bottom: clamp(6px, 1.2vw, 14px);
}

.page-contact .breadcrumb {
  font-size: 13px;
  letter-spacing: .02em;
}

/* ---------- 首屏 ---------- */

.page-contact .deck-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 52px);
  align-items: end;
  padding-bottom: var(--pc-space);
}

.page-contact .deck-copy h1 {
  margin: 14px 0 20px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 5.3vw, 74px);
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--slate-100);
}

.page-contact .deck-lede {
  margin: 0 0 26px;
  max-width: 36em;
  font-size: clamp(15px, 1.15vw, 17px);
  line-height: 1.65;
  color: var(--slate-300);
}

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

.page-contact .deck-figure {
  margin: 0;
}

.page-contact .figure__frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: var(--ratio, 16/9);
  border: 1px solid var(--pc-line);
  background: var(--ink-800);
  border-radius: var(--radius);
}

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

.page-contact .deck-figure .figure__frame {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), 0 100%);
}

.page-contact .figure__caption {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--slate-500);
  line-height: 1.6;
}

/* ---------- 两栏骨架 ---------- */

.page-contact .contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 5vw, 64px);
  padding-bottom: var(--pc-space);
}

.page-contact .reach-rail,
.page-contact .flow-section {
  scroll-margin-top: calc(var(--header-h-compact) + 24px);
}

.page-contact .reach-card {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 2.6vw, 30px) clamp(20px, 2.4vw, 28px);
  background: var(--glass-layer);
  border: var(--edge);
  border-radius: var(--radius);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.page-contact .reach-card::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--cyan-400), var(--cyan-700));
}

.page-contact .reach-title {
  margin: 10px 0 18px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 2vw, 24px);
  line-height: 1.28;
  letter-spacing: -.01em;
  color: var(--slate-100);
}

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

.page-contact .reach-item {
  padding: 16px 0;
  border-top: 1px solid var(--pc-line-soft);
}

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

.page-contact .reach-label {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--slate-500);
}

.page-contact .reach-value {
  display: block;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.42;
  letter-spacing: .01em;
  color: var(--cyan-400);
  word-break: break-word;
}

.page-contact .reach-value--line {
  color: var(--amber-400);
}

.page-contact .reach-value--plain {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 15px;
  line-height: 1.55;
  letter-spacing: 0;
  color: var(--slate-100);
}

.page-contact .reach-note {
  display: block;
  margin-top: 7px;
  font-size: 13.5px;
  line-height: 1.62;
  color: var(--slate-500);
}

/* ---------- 右列章节 ---------- */

.page-contact .flow-section + .flow-section {
  margin-top: clamp(44px, 6vw, 76px);
}

.page-contact .section-head {
  margin-bottom: clamp(20px, 2.6vw, 30px);
}

.page-contact .section-head h2 {
  margin: 10px 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.2vw, 40px);
  line-height: 1.18;
  letter-spacing: -.02em;
  color: var(--slate-100);
}

.page-contact .section-lede {
  margin: 0;
  max-width: 38em;
  font-size: 15.5px;
  line-height: 1.68;
  color: var(--slate-300);
}

/* ---------- 合作方向色带 ---------- */

.page-contact .lane-stack {
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .lane {
  border-top: 1px solid var(--pc-line);
}

.page-contact .lane-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 20px 6px;
  list-style: none;
  cursor: pointer;
  transition: background-color .2s var(--ease);
}

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

.page-contact .lane-head:hover,
.page-contact .lane-head:focus-visible {
  background: rgba(127, 233, 216, .07);
}

.page-contact .lane-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .16em;
  color: var(--amber-400);
}

.page-contact .lane-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 1.9vw, 21px);
  line-height: 1.3;
  color: var(--slate-100);
}

.page-contact .lane-arrow {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border: 1px solid var(--pc-line);
  border-radius: var(--radius);
  color: var(--cyan-400);
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1;
  transition: background-color .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.page-contact .lane-arrow::after {
  content: "+";
}

.page-contact .lane[open] .lane-arrow {
  background: var(--cyan-400);
  border-color: var(--cyan-400);
  color: var(--ink-950);
}

.page-contact .lane[open] .lane-arrow::after {
  content: "\2212";
}

.page-contact .lane-body {
  padding: 0 6px 24px;
}

.page-contact .lane-body p {
  margin: 0 0 14px;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.68;
  color: var(--slate-300);
}

.page-contact .lane-body .lane-mats-label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--slate-500);
}

.page-contact .lane-mats {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .lane-mats li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--slate-300);
}

.page-contact .lane-mats li::before {
  content: "";
  position: absolute;
  top: .68em;
  left: 0;
  width: 8px;
  height: 1px;
  background: var(--cyan-400);
}

/* ---------- 反馈与处理 ---------- */

.page-contact .feedback-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.5vw, 40px);
  align-items: start;
}

.page-contact .check-list {
  display: grid;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
}

.page-contact .check-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 15px 0;
  border-top: 1px solid var(--pc-line-soft);
}

.page-contact .check-item:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-contact .check-idx {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--amber-400);
}

.page-contact .check-body strong {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15.5px;
  line-height: 1.4;
  color: var(--slate-100);
}

.page-contact .check-body span {
  display: block;
  font-size: 14.5px;
  line-height: 1.62;
  color: var(--slate-500);
}

.page-contact .after-note {
  margin: 0;
  padding: 16px 18px;
  border-left: 2px solid var(--cyan-400);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: rgba(127, 233, 216, .07);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--slate-300);
}

.page-contact .feedback-figure {
  margin: 0;
}

.page-contact .feedback-figure .figure__frame {
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 calc(100% - 22px));
}

/* ---------- 主体与备案 ---------- */

.page-contact .entity-panel {
  padding: clamp(20px, 2.6vw, 30px);
  background: var(--ink-800);
  border: 1px solid var(--pc-line-soft);
  border-radius: var(--radius);
}

.page-contact .entity-list {
  display: grid;
  margin: 0 0 18px;
  padding: 0;
}

.page-contact .entity-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 13px 0;
  border-top: 1px solid var(--pc-line-soft);
}

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

.page-contact .entity-row dt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--slate-500);
}

.page-contact .entity-row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--slate-300);
}

.page-contact .entity-code {
  font-family: var(--font-mono);
  font-size: 14.5px;
  letter-spacing: .04em;
  color: var(--slate-100);
}

.page-contact .entity-note {
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid var(--pc-line-soft);
  font-size: 14px;
  line-height: 1.72;
  color: var(--slate-500);
}

.page-contact .inline-link {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 245, 196, .4);
  padding-bottom: 1px;
}

.page-contact .inline-link:hover,
.page-contact .inline-link:focus-visible {
  border-bottom-color: var(--cyan-400);
}

/* ---------- 媒体查询 ---------- */

@media (min-width: 760px) {
  .page-contact .feedback-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
  }

  .page-contact .entity-row {
    grid-template-columns: 128px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }

  .page-contact .deck-figure .figure__frame {
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 40px), 0 100%);
  }
}

@media (min-width: 900px) {
  .page-contact .deck-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

@media (min-width: 1024px) {
  .page-contact .contact-grid {
    grid-template-columns: minmax(0, var(--pc-rail)) minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .reach-rail {
    position: sticky;
    top: calc(var(--header-h-compact) + 28px);
    align-self: start;
  }
}

@media (max-width: 419px) {
  .page-contact .lane-head {
    grid-template-columns: auto minmax(0, 1fr) 24px;
    gap: 10px;
    padding: 16px 4px;
  }

  .page-contact .lane-arrow {
    width: 24px;
    height: 24px;
  }

  .page-contact .deck-actions .btn {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .lane-head,
  .page-contact .lane-arrow {
    transition: none;
  }
}

.page-contact {
  --ratio: inherit;
}