.page-contact {
  --co-radius: 24px;
  --co-pad: 20px;
  display: block;
  padding-bottom: 40px;
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-contact .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 20px 0 4px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--muted);
}
.page-contact .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease-out), border-color 0.2s var(--ease-out);
}
.page-contact .breadcrumb a:hover {
  color: var(--gold-soft);
  border-bottom-color: var(--gold-soft);
}

/* ---------- 首屏 ---------- */
.page-contact .co-hero {
  padding: 16px 0 56px;
  position: relative;
}
.page-contact .co-hero-grid {
  gap: 30px;
}
.page-contact .co-hero-title {
  font-size: clamp(30px, 5.2vw, 64px);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 14px 0 18px;
  color: var(--ivory);
  max-width: 20ch;
}
.page-contact .co-hero-lede {
  max-width: 38ch;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
}
.page-contact .co-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-contact .co-hero-panel {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 26px 22px 20px;
  background:
    radial-gradient(130% 90% at 100% 0%, rgba(63, 224, 200, 0.14), transparent 58%),
    radial-gradient(90% 70% at 0% 100%, rgba(139, 92, 246, 0.12), transparent 62%),
    linear-gradient(155deg, var(--ink-2), var(--ink) 72%);
}
.page-contact .co-hero-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(27, 74, 60, 0.55) 1px, transparent 1px),
    linear-gradient(90deg, rgba(27, 74, 60, 0.55) 1px, transparent 1px);
  background-size: 44px 44px;
  opacity: 0.3;
  pointer-events: none;
}
.page-contact .co-panel-label {
  position: relative;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
}
.page-contact .co-kpi {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px dashed rgba(27, 74, 60, 0.9);
}
.page-contact .co-kpi:last-child {
  border-bottom: 0;
}
.page-contact .co-kpi-num {
  font-family: var(--font-mono);
  font-size: clamp(30px, 3.6vw, 42px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--gold);
}
.page-contact .co-kpi-label,
.page-contact .kpi-label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}
.page-contact .co-panel-foot {
  position: relative;
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--muted);
}
.page-contact .co-panel-foot a {
  color: var(--gold-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 215, 134, 0.4);
}
.page-contact .co-panel-foot a:hover {
  border-bottom-color: var(--gold-soft);
}

/* ---------- 网格 ---------- */
.page-contact .co-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

/* ---------- 章节通用 ---------- */
.page-contact .co-section {
  padding: 56px 0;
}
.page-contact .chapter-band {
  position: relative;
  height: 6px;
  margin: 0 0 34px;
  border-radius: 6px;
  background: linear-gradient(90deg, var(--gold), var(--cyan) 68%, transparent 100%);
}
.page-contact .chapter-num {
  position: absolute;
  left: 0;
  bottom: 100%;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--gold);
}
.page-contact .section-title {
  font-size: clamp(24px, 3.4vw, 36px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0 0 14px;
  color: var(--ivory);
}
.page-contact .prose {
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 38ch;
  margin: 0;
}
.page-contact .prose a {
  color: var(--gold-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 215, 134, 0.4);
}
.page-contact .prose a:hover {
  border-bottom-color: var(--gold-soft);
}

/* ---------- 合作方向 ---------- */
.page-contact .co-dirs {
  display: flex;
  flex-direction: column;
}
.page-contact .co-dir {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(90deg, rgba(16, 46, 38, 0.95), rgba(11, 31, 26, 0.55));
  margin-bottom: 10px;
  padding: 0 18px;
  transition: border-color 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}
.page-contact .co-dir[open] {
  border-color: rgba(201, 162, 39, 0.55);
  background: var(--ink-2);
}
.page-contact .co-dir:hover {
  transform: translateY(-2px);
}
.page-contact .co-dir-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  color: var(--ivory);
}
.page-contact .co-dir-head::-webkit-details-marker {
  display: none;
}
.page-contact .co-dir-head::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--muted);
}
.page-contact .co-dir[open] .co-dir-head::after {
  content: "–";
  color: var(--gold-soft);
}
.page-contact .co-dir-idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
}
.page-contact .co-dir-name {
  flex: 0 1 auto;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.page-contact .co-dir-head .chip {
  flex: 0 0 auto;
}
.page-contact .co-dir-body {
  padding: 0 0 18px;
  border-top: 1px solid rgba(27, 74, 60, 0.7);
  padding-top: 14px;
}
.page-contact .co-dir-body p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 62ch;
}
.page-contact .co-dir-link {
  margin: 0 !important;
  font-size: 13px !important;
}
.page-contact .co-dir-link a {
  color: var(--gold-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 215, 134, 0.4);
}
.page-contact .co-dir-link a:hover {
  border-bottom-color: var(--gold-soft);
}

/* ---------- 流程章节 ---------- */
.page-contact .co-flow-head {
  margin-bottom: 24px;
}
.page-contact .co-flow-head .lede {
  max-width: 46ch;
  color: var(--muted);
}
.page-contact .co-flow-figure {
  margin: 0 0 26px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
}
.page-contact .co-flow-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-contact .co-rail {
  list-style: none;
  margin: 0;
  padding: 6px 4px 18px;
  display: flex;
  gap: 14px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}
.page-contact .co-rail::-webkit-scrollbar {
  height: 4px;
}
.page-contact .co-rail::-webkit-scrollbar-thumb {
  background: var(--line);
  border-radius: 4px;
}
.page-contact .co-step {
  position: relative;
  flex: 0 0 78%;
  scroll-snap-align: start;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--ink-2);
  padding: 22px 20px 20px;
  transition: transform 0.3s var(--ease-out), border-color 0.3s var(--ease-out);
}
.page-contact .co-step::before {
  content: "";
  position: absolute;
  top: 0;
  left: 20px;
  right: 20px;
  height: 3px;
  border-radius: 0 0 3px 3px;
  background: linear-gradient(90deg, var(--gold), var(--cyan));
  opacity: 0.8;
}
.page-contact .co-step-idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--gold);
}
.page-contact .co-step-name {
  margin: 10px 0 6px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ivory);
}
.page-contact .co-step-time {
  display: inline-block;
  margin: 0 0 12px;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  background: rgba(63, 224, 200, 0.12);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}
.page-contact .co-step-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 数据对接 ---------- */
.page-contact .co-data-copy .prose {
  max-width: 34ch;
}
.page-contact .co-data-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
}
.page-contact .co-data-list li {
  padding: 14px 0;
  border-top: 1px solid rgba(27, 74, 60, 0.8);
}
.page-contact .co-data-key {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
  margin-bottom: 6px;
}
.page-contact .co-data-val {
  display: block;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}
.page-contact .co-data-link {
  margin: 20px 0 0;
  font-size: 13px;
  color: var(--muted);
}
.page-contact .co-data-link a {
  color: var(--gold-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 215, 134, 0.4);
}
.page-contact .co-data-figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(160deg, rgba(16, 46, 38, 0.9), rgba(11, 31, 26, 0.7));
}
.page-contact .co-data-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-contact .co-data-figure figcaption {
  padding: 12px 18px 16px;
  font-size: 13px;
  color: var(--muted);
  border-top: 1px solid rgba(27, 74, 60, 0.7);
}

/* ---------- 合作收益 ---------- */
.page-contact .co-gains {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}
.page-contact .co-gain {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(16, 46, 38, 0.72);
  padding: 20px 20px 20px 62px;
  transition: transform 0.3s var(--ease-out), border-color 0.3s var(--ease-out);
}
.page-contact .co-gain:hover {
  transform: translateY(-4px);
  border-color: rgba(201, 162, 39, 0.5);
}
.page-contact .co-gain-num {
  position: absolute;
  left: 18px;
  top: 20px;
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1;
  color: var(--gold);
  opacity: 0.9;
}
.page-contact .co-gain h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ivory);
}
.page-contact .co-gain p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 联系区块（浅色） ---------- */
.page-contact .co-contact {
  background: var(--ivory);
  color: var(--ink-text);
  padding: 60px 0 52px;
}
.page-contact .co-contact .chapter-band {
  background: linear-gradient(90deg, var(--gold), var(--violet) 68%, transparent 100%);
}
.page-contact .co-contact .chapter-num {
  color: #997C14;
}
.page-contact .co-contact .section-title {
  color: var(--ink-text);
}
.page-contact .co-contact-lede {
  max-width: 48ch;
  color: var(--ink-text-soft);
}
.page-contact .co-channels {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 28px;
}
.page-contact .co-channel {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: #ffffff;
  border: 1px solid rgba(11, 31, 26, 0.1);
  border-radius: var(--radius-md);
  padding: 22px 20px;
  box-shadow: 0 1px 0 rgba(11, 31, 26, 0.04);
}
.page-contact .co-channel-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #997C14;
}
.page-contact .co-channel-value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(16px, 2.4vw, 20px);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink-text);
  overflow-wrap: anywhere;
}
.page-contact .co-channel-value--sm {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.7;
}
.page-contact .co-channel-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-text-soft);
}
.page-contact .co-contact-foot {
  margin: 26px 0 0;
  padding-top: 18px;
  border-top: 1px solid rgba(11, 31, 26, 0.12);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-text-soft);
}

/* ---------- 资料清单 ---------- */
.page-contact .co-checklist {
  display: grid;
  gap: 12px;
}
.page-contact .co-check {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(16, 46, 38, 0.6);
  padding: 18px 20px;
}
.page-contact .co-check-box {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  border: 1px solid rgba(201, 162, 39, 0.5);
  background: rgba(201, 162, 39, 0.1);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--gold);
}
.page-contact .co-check-body h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ivory);
}
.page-contact .co-check-body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 常见问题 ---------- */
.page-contact .co-faq {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.page-contact .co-faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(16, 46, 38, 0.62);
  padding: 0 20px;
}
.page-contact .co-faq-item[open] {
  background: var(--ink-2);
  border-color: rgba(63, 224, 200, 0.35);
}
.page-contact .co-faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 30px 16px 0;
  position: relative;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ivory);
}
.page-contact .co-faq-item summary::-webkit-details-marker {
  display: none;
}
.page-contact .co-faq-item summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 17px;
  color: var(--muted);
}
.page-contact .co-faq-item[open] summary::after {
  content: "–";
  color: var(--cyan);
}
.page-contact .co-faq-item p {
  margin: 0;
  padding: 0 0 18px;
  border-top: 1px solid rgba(27, 74, 60, 0.7);
  padding-top: 14px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 响应式 ---------- */
@media (max-width: 899px) {
  .page-contact .co-rail {
    margin-inline: -16px;
    padding-inline: 16px;
  }
  .page-contact .co-hero-title {
    max-width: none;
  }
}

@media (min-width: 900px) {
  .page-contact .co-hero {
    padding: 30px 0 76px;
  }
  .page-contact .co-grid {
    grid-template-columns: repeat(12, 1fr);
    gap: 36px;
  }
  .page-contact .co-col-4 {
    grid-column: span 4;
  }
  .page-contact .co-col-5 {
    grid-column: span 5;
  }
  .page-contact .co-col-7 {
    grid-column: span 7;
  }
  .page-contact .co-col-8 {
    grid-column: span 8;
  }
  .page-contact .co-grid > .co-col-4:first-child {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }
  .page-contact .co-rail {
    overflow: visible;
    scroll-snap-type: none;
    padding: 6px 0 6px;
  }
  .page-contact .co-step {
    flex: 1 1 0;
    min-width: 0;
  }
  .page-contact .co-step:hover {
    transform: translateY(-4px);
    border-color: rgba(201, 162, 39, 0.5);
  }
  .page-contact .co-gains {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }
  .page-contact .co-channels {
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
  }
  .page-contact .co-checklist {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .page-contact .co-section {
    padding: 84px 0;
  }
  .page-contact .co-contact {
    padding: 84px 0 72px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .co-step,
  .page-contact .co-dir,
  .page-contact .co-gain {
    transition: none;
  }
  .page-contact .co-step:hover,
  .page-contact .co-dir:hover,
  .page-contact .co-gain:hover {
    transform: none;
  }
}