.page-contact {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-contact .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(18px, 3vw, 30px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--index-gray);
}
.page-contact .breadcrumb a {
  color: var(--index-gray);
  text-decoration: none;
}
.page-contact .breadcrumb a:hover {
  color: var(--gold-soft);
}
.page-contact .breadcrumb [aria-current] {
  color: var(--gold);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding-block: clamp(24px, 4vw, 52px) clamp(36px, 6vw, 76px);
}
.page-contact .contact-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
}
.page-contact .contact-hero__title {
  margin: 12px 0 18px;
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(30px, 6vw, 56px);
  line-height: 1.14;
  letter-spacing: -.01em;
  color: var(--paper);
}
.page-contact .lede {
  margin: 0;
  max-width: 60ch;
  font-size: 16.5px;
  line-height: 1.8;
  color: rgba(244, 239, 228, .78);
}

/* 首屏三条合作线短说明 */
.page-contact .direction-mini {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
}
.page-contact .direction-mini li {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 14px;
  padding: 14px 0;
  border-top: 1px solid var(--indigo-mid);
}
.page-contact .direction-mini li:last-child {
  border-bottom: 1px solid var(--indigo-mid);
}
.page-contact .direction-mini__num {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gold);
}
.page-contact .direction-mini strong {
  display: block;
  margin-bottom: 4px;
  font-size: 15px;
  font-weight: 500;
  color: var(--paper);
}
.page-contact .direction-mini p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(244, 239, 228, .64);
}

.page-contact .contact-hero__media {
  margin: clamp(28px, 4vw, 44px) 0 0;
  border-radius: var(--radius-card);
  overflow: hidden;
}
.page-contact .contact-hero__media img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* ---------- 首屏联系卡 ---------- */
.page-contact .contact-card {
  background: var(--paper);
  color: var(--black);
  border-radius: var(--radius-card);
  border-top: 4px solid var(--gold);
  padding: clamp(20px, 3vw, 30px);
  box-shadow: var(--shadow-float);
}
.page-contact .contact-card__title {
  margin: 0 0 6px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 20px;
  color: var(--black);
}
.page-contact .contact-card__sub {
  margin: 0 0 18px;
  font-size: 13px;
  line-height: 1.7;
  color: #5b6273;
}
.page-contact .contact-card__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0;
  border-top: 1px solid rgba(16, 19, 26, .12);
}
.page-contact .contact-card__key {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: #6a7183;
}
.page-contact .contact-card__val {
  font-family: var(--font-mono);
  font-size: 14.5px;
  font-weight: 600;
  text-align: right;
  color: var(--black);
  word-break: break-all;
}
.page-contact .contact-copy {
  width: 100%;
  margin-top: 8px;
  padding: 10px 14px;
  border: 1px solid rgba(16, 19, 26, .2);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--black);
  font-family: var(--font-sans);
  font-size: 13px;
  cursor: pointer;
  transition: background .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}
.page-contact .contact-copy:hover {
  background: rgba(199, 160, 58, .18);
  border-color: var(--gold);
}
.page-contact .contact-copy.is-copied {
  background: var(--jade-a);
  border-color: var(--jade-a);
  color: #fff;
}

/* ---------- 通用标题 ---------- */
.page-contact .section-head {
  margin-bottom: clamp(24px, 4vw, 42px);
}
.page-contact .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--gold);
}
.page-contact .section-title {
  margin: 10px 0 12px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(24px, 3.4vw, 36px);
  line-height: 1.26;
  color: var(--paper);
}
.page-contact .section-sub {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 239, 228, .68);
}

/* ---------- 浅色流程章节内的标题配色 ---------- */
.page-contact .section--paper {
  background: var(--paper);
  color: var(--black);
}
.page-contact .section--paper .eyebrow {
  color: var(--jade-a);
}
.page-contact .section--paper .section-title {
  color: var(--black);
}
.page-contact .section--paper .section-sub {
  color: rgba(16, 19, 26, .66);
}

/* ---------- 三条合作线 ---------- */
.page-contact .coop-section {
  padding-block: clamp(46px, 7vw, 88px);
}
.page-contact .coop-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 2.4vw, 26px);
}
.page-contact .coop-card {
  position: relative;
  padding: 30px 24px 24px;
  background: var(--indigo-deep);
  border: 1px solid var(--indigo-mid);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: transform .24s var(--ease), border-color .24s var(--ease);
}
.page-contact .coop-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--jade-a), var(--jade-b));
}
.page-contact .coop-card:hover {
  transform: translateY(-4px);
  border-color: var(--jade-a);
}
.page-contact .coop-card .index-num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gold);
}
.page-contact .coop-card .card-title {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 22px;
  color: var(--paper);
}
.page-contact .coop-card .card-text {
  margin: 0 0 16px;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(244, 239, 228, .74);
}
.page-contact .coop-need {
  padding-top: 14px;
  border-top: 1px dashed var(--indigo-mid);
  overflow: hidden;
}
.page-contact .coop-need__title {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--jade-b);
}
.page-contact .coop-need ul {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 6px;
}
.page-contact .coop-need li {
  font-size: 13.5px;
  line-height: 1.68;
  color: rgba(244, 239, 228, .7);
}
.page-contact .coop-link {
  display: inline-block;
  margin-top: 16px;
  font-size: 13.5px;
  color: var(--gold-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .2s var(--ease);
}
.page-contact .coop-link:hover {
  border-bottom-color: var(--gold-soft);
}

/* ---------- 四步流程 ---------- */
.page-contact .flow-section {
  padding-block: clamp(46px, 7vw, 88px);
}
.page-contact .flow-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 38px);
  align-items: end;
  margin-bottom: clamp(26px, 4vw, 46px);
}
.page-contact .contact-flow__media {
  margin: 0;
  border-radius: var(--radius-card);
  overflow: hidden;
}
.page-contact .contact-flow__media img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}
.page-contact .flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.page-contact .flow-item {
  position: relative;
  padding: 22px 20px 20px;
  background: rgba(255, 255, 255, .58);
  border: 1px solid rgba(16, 19, 26, .1);
  border-radius: var(--radius-card);
}
.page-contact .flow-num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .14em;
  color: var(--jade-a);
}
.page-contact .flow-title {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 19px;
  color: var(--black);
}
.page-contact .flow-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(16, 19, 26, .72);
}

/* ---------- 联系渠道 ---------- */
.page-contact .reach-section {
  padding-block: clamp(46px, 7vw, 88px);
}
.page-contact .reach-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.page-contact .reach-item {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px 22px;
  background: var(--indigo-deep);
  border: 1px solid var(--indigo-mid);
  border-left: 3px solid var(--gold);
  border-radius: var(--radius-card);
}
.page-contact .reach-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--gold);
}
.page-contact .reach-value {
  margin: 0;
}
.page-contact .reach-value--mono {
  font-family: var(--font-mono);
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 600;
  color: var(--paper);
  word-break: break-all;
}
.page-contact .reach-value--text {
  font-size: 15.5px;
  line-height: 1.74;
  color: var(--paper);
}
.page-contact .reach-copy {
  align-self: flex-start;
  padding: 9px 18px;
  border: 1px solid var(--indigo-mid);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--gold-soft);
  font-family: var(--font-sans);
  font-size: 13px;
  cursor: pointer;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}
.page-contact .reach-copy:hover {
  background: rgba(199, 160, 58, .16);
  border-color: var(--gold);
}
.page-contact .reach-copy.is-copied {
  background: var(--jade-a);
  border-color: var(--jade-a);
  color: #fff;
}
.page-contact .reach-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--index-gray);
}

/* ---------- 反馈与纠错 ---------- */
.page-contact .feedback-section {
  padding-block: clamp(42px, 6vw, 78px);
}
.page-contact .feedback-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
}
.page-contact .feedback-panel {
  padding: 26px 24px;
  border-radius: var(--radius-card);
  background: linear-gradient(155deg, rgba(46, 125, 116, .42), rgba(20, 34, 74, .3)) , var(--indigo-deep);
  border: 1px solid var(--indigo-mid);
}
.page-contact .feedback-panel__title {
  margin: 0 0 16px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 19px;
  color: var(--paper);
}
.page-contact .feedback-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-contact .feedback-list li {
  position: relative;
  padding-left: 22px;
  font-size: 14.5px;
  line-height: 1.74;
  color: rgba(244, 239, 228, .84);
}
.page-contact .feedback-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border: 1px solid var(--cinnabar);
  background: rgba(182, 59, 46, .35);
  border-radius: 2px;
  transform: rotate(45deg);
}
.page-contact .feedback-grid .prose {
  max-width: 72ch;
}
.page-contact .feedback-grid .prose .section-title {
  margin-top: 0;
}
.page-contact .feedback-grid .prose p {
  margin: 0 0 15px;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(244, 239, 228, .76);
}
.page-contact .feedback-link {
  display: inline-block;
  padding: 10px 20px;
  border: 1px solid var(--jade-a);
  border-radius: var(--radius-pill);
  color: var(--jade-b);
  font-size: 13.5px;
  text-decoration: none;
  transition: background .2s var(--ease), color .2s var(--ease);
}
.page-contact .feedback-link:hover {
  background: var(--jade-a);
  color: var(--paper);
}

/* ---------- 合作常见问题 ---------- */
.page-contact .qa-section {
  padding-block: clamp(46px, 7vw, 88px);
}
.page-contact .qa-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0 34px;
}
.page-contact .qa-item {
  border-bottom: 1px solid var(--indigo-mid);
  padding: 4px 0 16px;
}
.page-contact .qa-item summary {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 0;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.5;
  color: var(--paper);
}
.page-contact .qa-item summary::-webkit-details-marker {
  display: none;
}
.page-contact .qa-item summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--gold);
}
.page-contact .qa-item[open] summary::after {
  content: "−";
}
.page-contact .qa-item[open] summary {
  color: var(--gold-soft);
}
.page-contact .qa-body {
  padding: 0 0 6px;
}
.page-contact .qa-body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(244, 239, 228, .72);
}

/* ---------- 收尾 ---------- */
.page-contact .contact-tail {
  padding-block: clamp(34px, 5vw, 58px);
  border-top: 2px solid var(--cinnabar);
}
.page-contact .contact-tail__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}
.page-contact .contact-tail__text {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(18px, 2.2vw, 24px);
  line-height: 1.5;
  color: var(--paper);
}
.page-contact .tail-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.page-contact .tail-links a {
  padding: 8px 15px;
  border: 1px solid var(--indigo-mid);
  border-radius: var(--radius-pill);
  color: var(--paper);
  font-size: 13.5px;
  text-decoration: none;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}
.page-contact .tail-links a:hover {
  border-color: var(--gold);
  color: var(--gold-soft);
}

/* ---------- 响应式 ---------- */
@media (min-width: 820px) {
  .page-contact .flow-head {
    grid-template-columns: 7fr 5fr;
  }
  .page-contact .reach-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-contact .contact-tail__inner {
    grid-template-columns: 7fr 5fr;
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-contact .coop-grid {
    grid-template-columns: repeat(3, 1fr);
    align-items: start;
  }
  .page-contact .coop-card:nth-child(2) {
    margin-top: 34px;
  }
  .page-contact .coop-card:nth-child(3) {
    margin-top: 68px;
  }
  .page-contact .flow {
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
  }
  .page-contact .flow-item {
    padding: 30px 22px 26px 0;
    background: transparent;
    border: none;
    border-radius: 0;
  }
  .page-contact .flow-item:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 36px;
    left: 66px;
    right: 12px;
    height: 1px;
    background: linear-gradient(90deg, var(--jade-a), rgba(134, 201, 184, .12));
  }
  .page-contact .flow-num {
    position: relative;
    z-index: 1;
    display: inline-block;
    padding-right: 10px;
    background: var(--paper);
  }
  .page-contact .feedback-grid {
    grid-template-columns: 5fr 7fr;
    align-items: start;
  }
  .page-contact .qa-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }
  .page-contact .contact-card {
    position: sticky;
    top: 104px;
  }
}

@media (hover: hover) and (min-width: 900px) {
  .page-contact .coop-need {
    max-height: 0;
    padding-top: 0;
    opacity: 0;
    border-top-color: transparent;
    transition: max-height .3s var(--ease), opacity .24s var(--ease), padding-top .3s var(--ease);
  }
  .page-contact .coop-card:hover .coop-need,
  .page-contact .coop-card:focus-within .coop-need {
    max-height: 340px;
    padding-top: 14px;
    opacity: 1;
    border-top-color: var(--indigo-mid);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .coop-card,
  .page-contact .coop-need,
  .page-contact .tail-links a,
  .page-contact .feedback-link {
    transition: none;
  }
  .page-contact .coop-card:hover {
    transform: none;
  }
}