.page-contact {
  background: var(--ink-950);
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-contact .coop-hero {
  padding: calc(var(--header-h) + 52px) 0 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .coop-hero .breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 30px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--steel);
}

.page-contact .coop-hero .breadcrumb a {
  color: var(--steel);
  text-decoration: none;
}

.page-contact .coop-hero .breadcrumb a:hover {
  color: var(--cyan);
}

.page-contact .coop-hero .crumb-sep {
  color: rgba(167, 179, 218, 0.5);
}

.page-contact .coop-hero-grid {
  display: grid;
  gap: 40px;
}

.page-contact .coop-hero-main .label {
  margin: 0 0 16px;
}

.page-contact .coop-hero h1 {
  margin: 0 0 22px;
  font-size: clamp(38px, 8vw, 66px);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -0.01em;
}

.page-contact .coop-lede {
  max-width: 48ch;
  margin: 0;
  font-size: 17px;
  line-height: 1.85;
  color: var(--steel);
}

.page-contact .coop-hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--line-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-contact .coop-hero-facts > div {
  min-width: 0;
  padding: 20px 16px 18px;
  background: var(--ink-950);
}

.page-contact .coop-hero-facts dt {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-contact .coop-hero-facts dd {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 28px;
  line-height: 1;
  color: var(--paper);
}

.page-contact .coop-hero-facts p {
  margin: 0;
  font-size: 12px;
  line-height: 1.6;
  color: var(--steel);
}

.page-contact .coop-index {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 26px;
  margin-top: 44px;
  padding: 16px 0 20px;
  border-top: 1px solid var(--line);
}

.page-contact .coop-index a {
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  padding-bottom: 4px;
  border-bottom: 1px solid transparent;
  font-size: 14px;
  color: var(--steel);
  text-decoration: none;
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-contact .coop-index a .num {
  font-size: 12px;
  color: var(--cyan);
}

.page-contact .coop-index a:hover,
.page-contact .coop-index a[aria-current="true"] {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 主体网格 ---------- */
.page-contact .coop-body {
  display: grid;
  gap: 48px;
  padding: 60px 0 0;
}

.page-contact .coop-rail,
.page-contact .coop-flow-col {
  min-width: 0;
}

/* ---------- 左侧联系信息块 ---------- */
.page-contact .coop-contact-card {
  background: var(--paper);
  color: var(--ink-deep);
  padding: 26px 22px 22px;
  border-top: 4px solid var(--cyan);
}

.page-contact .coop-contact-card .label {
  margin: 0;
  color: var(--cyan-deep);
}

.page-contact .contact-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
}

.page-contact .contact-list li {
  padding: 15px 0;
  border-top: 1px solid rgba(11, 14, 28, 0.16);
}

.page-contact .contact-list li:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-contact .contact-key {
  display: block;
  margin-bottom: 7px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: rgba(11, 14, 28, 0.55);
}

.page-contact .contact-value {
  display: block;
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink-deep);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.page-contact .contact-value.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.page-contact .contact-hint {
  display: block;
  margin-top: 7px;
  font-size: 12px;
  line-height: 1.6;
  color: rgba(11, 14, 28, 0.62);
}

.page-contact .contact-note {
  margin: 18px 0 0;
  padding-top: 15px;
  border-top: 1px solid rgba(11, 14, 28, 0.16);
  font-size: 13px;
  line-height: 1.75;
  color: rgba(11, 14, 28, 0.72);
}

/* ---------- 章节骨架 ---------- */
.page-contact .coop-section {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-contact .coop-section + .coop-section {
  margin-top: 68px;
  padding-top: 56px;
  border-top: 1px solid var(--line);
}

.page-contact .coop-intro {
  max-width: 58ch;
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--steel);
}

/* ---------- 合作方向 ---------- */
.page-contact .coop-item {
  --coop-accent: var(--cyan);
  margin-top: 28px;
  padding: 26px 22px 30px;
  background: var(--ink-900);
  border-left: 3px solid var(--coop-accent);
}

.page-contact .coop-item--data {
  --coop-accent: var(--cyan);
  padding-bottom: 26px;
}

.page-contact .coop-item--content {
  --coop-accent: var(--orange);
  padding-bottom: 42px;
  background: var(--ink-800);
}

.page-contact .coop-item--channel {
  --coop-accent: var(--magenta);
  padding-bottom: 20px;
}

.page-contact .coop-tag {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--coop-accent);
}

.page-contact .coop-tag::before {
  content: "";
  width: 18px;
  height: 3px;
  background: var(--coop-accent);
}

.page-contact .coop-item h3 {
  margin: 0 0 12px;
  font-size: 22px;
  font-weight: 800;
  line-height: 1.3;
  color: var(--paper);
}

.page-contact .coop-item > p {
  max-width: 56ch;
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--steel);
}

.page-contact .coop-meta {
  margin: 0;
  border-top: 1px solid var(--line);
}

.page-contact .coop-meta > div {
  display: grid;
  gap: 5px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .coop-meta dt {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--coop-accent);
}

.page-contact .coop-meta dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--steel);
}

.page-contact .coop-shot {
  margin: 32px 0 0;
}

.page-contact .coop-shot img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--line);
  filter: saturate(0.8) contrast(1.06);
}

.page-contact .coop-shot .media-caption,
.page-contact .channel-shot .media-caption {
  display: block;
  margin-top: 12px;
  padding-left: 12px;
  border-left: 2px solid var(--cyan);
  font-size: 13px;
  line-height: 1.7;
  color: var(--steel);
}

/* ---------- 合作流程 ---------- */
.page-contact .flow {
  margin-top: 28px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.page-contact .flow-rail {
  display: block;
  width: 100%;
  height: 8px;
  margin: 0 0 18px;
}

.page-contact .flow-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 26px;
}

.page-contact .flow-step {
  position: relative;
  min-width: 0;
}

.page-contact .flow-no {
  display: block;
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1;
  color: var(--cyan);
}

.page-contact .flow-step h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 800;
  line-height: 1.35;
  color: var(--paper);
}

.page-contact .flow-role {
  margin: 0 0 9px;
  font-size: 11px;
  letter-spacing: 0.14em;
  line-height: 1.5;
  color: var(--orange);
}

.page-contact .flow-step > p:last-child {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--steel);
}

.page-contact .flow-step::before {
  content: "";
  position: absolute;
  left: -17px;
  top: 7px;
  width: 7px;
  height: 7px;
  background: var(--cyan);
}

.page-contact .flow-step {
  padding-left: 18px;
  border-left: 1px solid var(--line);
}

/* ---------- 联系渠道 ---------- */
.page-contact .channel-split {
  margin-top: 28px;
  display: grid;
  gap: 32px;
}

.page-contact .channel-copy h3 {
  margin: 0 0 14px;
  font-size: 20px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--paper);
}

.page-contact .channel-copy > p {
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--steel);
}

.page-contact .checklist {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-contact .checklist li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper);
}

.page-contact .checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border: 1px solid var(--cyan);
}

.page-contact .channel-reply {
  margin: 0;
  padding: 18px 18px 18px 20px;
  background: rgba(38, 242, 226, 0.07);
  border-left: 3px solid var(--cyan);
  font-size: 14px;
  line-height: 1.85;
  color: var(--paper);
}

.page-contact .channel-reply a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .channel-reply a:hover {
  color: var(--orange);
}

.page-contact .channel-shot {
  margin: 0;
}

.page-contact .channel-shot img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border: 1px solid var(--line);
  filter: saturate(0.78) contrast(1.05);
}

/* ---------- 常见问题 ---------- */
.page-contact .faq {
  margin-top: 28px;
  border-top: 1px solid var(--line);
}

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

.page-contact .faq-item summary {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 19px 0;
  list-style: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--paper);
  transition: color 0.24s var(--ease);
}

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

.page-contact .faq-item summary::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--cyan);
}

.page-contact .faq-item[open] summary::after {
  content: "−";
  color: var(--orange);
}

.page-contact .faq-item summary:hover {
  color: var(--cyan);
}

.page-contact .faq-no {
  flex: none;
  font-size: 13px;
  color: var(--steel);
}

.page-contact .faq-body {
  padding: 0 0 22px 34px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--steel);
}

.page-contact .faq-body p {
  margin: 0;
}

.page-contact .faq-body a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 收束 ---------- */
.page-contact .coop-closing {
  margin-top: 86px;
  padding-bottom: 68px;
}

.page-contact .closing-band {
  height: 12px;
  margin-bottom: 26px;
  background: linear-gradient(
    90deg,
    var(--cyan) 0%,
    var(--cyan) 22%,
    var(--orange) 22%,
    var(--orange) 46%,
    var(--magenta) 46%,
    var(--magenta) 62%,
    var(--ink-800) 62%,
    var(--ink-800) 100%
  );
}

.page-contact .closing-inner {
  display: grid;
  gap: 20px;
  align-items: center;
}

.page-contact .closing-text {
  max-width: 44ch;
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.7;
  color: var(--paper);
}

.page-contact .closing-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-contact .closing-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 38px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.page-contact .closing-nav a {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--steel);
  text-decoration: none;
  transition: color 0.24s var(--ease);
}

.page-contact .closing-nav a:hover {
  color: var(--cyan);
}

.page-contact .closing-nav a.closing-top {
  color: var(--cyan);
}

/* ---------- 响应式 ---------- */
@media (max-width: 639px) {
  .page-contact .coop-hero-facts {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-contact .coop-hero-facts > div {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 4px 16px;
    align-items: baseline;
    padding: 16px 14px;
  }

  .page-contact .coop-hero-facts dt {
    grid-column: 1 / -1;
    margin-bottom: 4px;
  }

  .page-contact .coop-hero-facts dd {
    margin: 0;
    font-size: 24px;
  }

  .page-contact .coop-hero-facts p {
    margin: 0;
  }

  .page-contact .faq-body {
    padding-left: 0;
  }
}

@media (min-width: 760px) {
  .page-contact .coop-meta > div {
    grid-template-columns: 104px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }

  .page-contact .flow-steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 18px;
  }

  .page-contact .flow-step {
    padding-left: 16px;
  }

  .page-contact .flow-step::before {
    left: -4px;
  }

  .page-contact .closing-inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

@media (min-width: 1000px) {
  .page-contact .coop-hero {
    padding-top: calc(var(--header-h) + 72px);
  }

  .page-contact .coop-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: end;
  }

  .page-contact .coop-body {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 56px;
    align-items: start;
    padding-top: 72px;
  }

  .page-contact .coop-rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-contact .channel-split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-contact .coop-item {
    padding: 30px 30px 34px;
  }

  .page-contact .coop-item--data {
    padding-bottom: 26px;
  }

  .page-contact .coop-item--content {
    padding-bottom: 48px;
  }

  .page-contact .coop-item--channel {
    padding-bottom: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .coop-index a,
  .page-contact .faq-item summary,
  .page-contact .closing-nav a {
    transition: none;
  }
}