/* ===== 商务合作 /contact ===== */
.page-contact {
  --pc-gap: clamp(24px, 4vw, 56px);
  --pc-panel: #ffffff;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
}

/* ---------- 首屏 ---------- */
.page-contact .pc-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--deep);
  color: var(--paper);
  padding: calc(var(--header-h) + 40px) 0 var(--s-7);
}

.page-contact .pc-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(var(--line-on-deep) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-on-deep) 1px, transparent 1px);
  background-size: 96px 96px;
  opacity: 0.6;
  pointer-events: none;
}

.page-contact .pc-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 6px;
  background: var(--orange);
  z-index: -1;
}

.page-contact .pc-hero .breadcrumb,
.page-contact .pc-hero .breadcrumb a {
  color: rgba(244, 241, 233, 0.72);
}

.page-contact .pc-hero .breadcrumb [aria-current="page"] {
  color: var(--yellow);
}

.page-contact .pc-hero__grid {
  display: grid;
  gap: var(--pc-gap);
  margin-top: var(--s-7);
}

.page-contact .pc-hero__lead .eyebrow {
  color: var(--yellow);
}

.page-contact .pc-hero h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(32px, 7vw, 56px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: var(--s-2) 0 var(--s-3);
  max-width: 18ch;
}

.page-contact .pc-hero h1::after {
  content: "";
  display: block;
  width: 72px;
  height: 4px;
  margin-top: var(--s-3);
  background: var(--orange);
}

.page-contact .pc-hero__intro {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: rgba(244, 241, 233, 0.84);
  max-width: 46ch;
}

.page-contact .pc-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
  margin-top: var(--s-4);
}

.page-contact .pc-hero__aside {
  border-top: 1px solid var(--line-on-deep);
  padding-top: var(--s-3);
}

.page-contact .pc-hero__aside-title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--turf);
  color: #6FC79B;
  margin: 0 0 var(--s-2);
}

.page-contact .pc-hero__list {
  list-style: none;
  margin: 0 0 var(--s-3);
  padding: 0;
}

.page-contact .pc-hero__list li {
  font-size: 15px;
  line-height: 1.6;
  padding: 8px 0;
  border-bottom: 1px dashed var(--line-on-deep);
  color: rgba(244, 241, 233, 0.9);
}

.page-contact .pc-hero__links {
  font-size: 13px;
  line-height: 1.8;
  color: rgba(244, 241, 233, 0.66);
  margin: 0;
}

.page-contact .pc-hero__links a {
  color: var(--yellow);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .pc-stats {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--s-3);
  margin: var(--s-7) 0 0;
  padding: var(--s-4) 0 0;
  border-top: 1px solid var(--line-on-deep);
}

.page-contact .pc-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-contact .pc-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--yellow);
}

.page-contact .pc-stat__label {
  font-size: 13px;
  line-height: 1.5;
  color: rgba(244, 241, 233, 0.72);
}

/* ---------- 通用题头 ---------- */
.page-contact .sec-head__title {
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.15;
}

.page-contact .sec-head__lead {
  max-width: 62ch;
  line-height: 1.8;
}

/* ---------- 合作方向 ---------- */
.page-contact .pc-banner {
  position: relative;
  overflow: hidden;
  margin-bottom: var(--s-7);
  background: var(--deep-2);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 calc(100% - 22px));
}

.page-contact .pc-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(0.92);
}

.page-contact .pc-banner__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  margin: 0;
  padding: var(--s-2) var(--s-3);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--paper);
  background: rgba(11, 44, 74, 0.82);
  max-width: 100%;
}

.page-contact .pc-dirs {
  display: grid;
  gap: 1px;
  margin-top: var(--s-7);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-contact .pc-dir {
  position: relative;
  background: var(--paper);
  padding: var(--s-3) var(--s-3) var(--s-4);
  border-top: 3px solid transparent;
  transition: background-color 0.25s ease, border-top-color 0.25s ease;
}

.page-contact .pc-dir:hover,
.page-contact .pc-dir:focus-within {
  background: var(--pc-panel);
  border-top-color: var(--orange);
}

.page-contact .pc-dir__index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--clay);
  margin: 0 0 var(--s-1);
}

.page-contact .pc-dir__title {
  font-family: var(--font-head);
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0 0 var(--s-1);
}

.page-contact .pc-dir__for {
  display: inline-block;
  font-size: 12px;
  line-height: 1.5;
  color: var(--turf);
  border: 1px solid rgba(46, 125, 91, 0.4);
  background: rgba(46, 125, 91, 0.08);
  padding: 4px 8px;
  margin: 0 0 var(--s-2);
}

.page-contact .pc-dir__body {
  font-size: 15px;
  line-height: 1.8;
  margin: 0 0 var(--s-3);
  color: #2A323C;
}

.page-contact .pc-dir__meta {
  list-style: none;
  margin: 0;
  padding: var(--s-2) 0 0;
  border-top: 1px solid var(--line);
}

.page-contact .pc-dir__meta li {
  display: flex;
  gap: var(--s-2);
  font-size: 13px;
  line-height: 1.7;
  color: var(--rock);
}

.page-contact .pc-dir__meta .num {
  font-family: var(--font-mono);
  color: var(--ink);
  min-width: 4em;
}

.page-contact .pc-dir__more {
  display: grid;
  grid-template-rows: 1fr;
  margin-top: var(--s-2);
}

.page-contact .pc-dir__more > div {
  overflow: hidden;
}

.page-contact .pc-dir__more-title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--orange);
  margin: 0 0 4px;
}

.page-contact .pc-dir__more p:last-child {
  font-size: 13px;
  line-height: 1.75;
  color: var(--rock);
  margin: 0;
  padding-top: var(--s-1);
  border-top: 1px solid var(--line);
}

/* ---------- 对接流程 ---------- */
.page-contact .pc-flow {
  list-style: none;
  display: grid;
  gap: var(--s-1);
  margin: var(--s-7) 0 var(--s-4);
  padding: 0;
  counter-reset: none;
}

.page-contact .pc-flow__step a {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: var(--s-2);
  padding: var(--s-2) var(--s-3);
  text-decoration: none;
  color: var(--ink);
  border-top: 2px solid var(--line-strong);
  background: var(--paper-2);
  transition: border-top-color 0.2s ease, background-color 0.2s ease;
}

.page-contact .pc-flow__step a:hover,
.page-contact .pc-flow__step a:focus-visible {
  border-top-color: var(--orange);
  background: var(--pc-panel);
}

.page-contact .pc-flow__num {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--orange);
}

.page-contact .pc-flow__label {
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.page-contact .pc-flow__time {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--rock);
}

.page-contact .pc-flow__details {
  display: grid;
  gap: var(--s-3);
}

.page-contact .pc-flow__detail {
  background: var(--pc-panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--turf);
  padding: var(--s-3);
  box-shadow: var(--shadow-soft);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-contact .pc-flow__detail-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--clay);
  margin: 0 0 6px;
}

.page-contact .pc-flow__detail h3 {
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 800;
  margin: 0 0 var(--s-1);
}

.page-contact .pc-flow__detail p:last-child {
  font-size: 15px;
  line-height: 1.8;
  color: #2A323C;
  margin: 0;
}

/* ---------- 问答 ---------- */
.page-contact .pc-faq {
  margin-top: var(--s-7);
  border-top: 1px solid var(--line);
}

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

.page-contact .pc-faq__item summary {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  padding: var(--s-3) 0;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 800;
  line-height: 1.5;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

.page-contact .pc-faq__item summary::before {
  content: "+";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--paper);
  background: var(--deep);
}

.page-contact .pc-faq__item[open] summary::before {
  content: "−";
  background: var(--orange);
}

.page-contact .pc-faq__item summary:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
}

.page-contact .pc-faq__item p {
  font-size: 15px;
  line-height: 1.85;
  color: #2A323C;
  max-width: 68ch;
  margin: 0 0 var(--s-3);
  padding-left: 32px;
}

/* ---------- 意向与联系 ---------- */
.page-contact .pc-intent-wrap {
  background: var(--paper-2);
}

.page-contact .pc-intent {
  display: grid;
  gap: var(--pc-gap);
  margin-top: var(--s-7);
}

.page-contact .pc-intent__checklist {
  background: var(--pc-panel);
  border: 1px solid var(--line);
  padding: var(--s-4) var(--s-3);
  box-shadow: var(--shadow-soft);
}

.page-contact .pc-intent__sub {
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 800;
  margin: 0 0 var(--s-3);
  padding-bottom: var(--s-2);
  border-bottom: 1px solid var(--line);
}

.page-contact .pc-check {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--s-3);
}

.page-contact .pc-check__item {
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: var(--s-2);
  row-gap: 4px;
}

.page-contact .pc-check__num {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--orange);
  padding-top: 3px;
}

.page-contact .pc-check__label {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  margin: 0;
}

.page-contact .pc-check__hint {
  font-size: 14px;
  line-height: 1.75;
  color: var(--rock);
  margin: 0;
}

.page-contact .pc-intent__note {
  margin: var(--s-4) 0 0;
  padding-top: var(--s-3);
  border-top: 1px dashed var(--line-strong);
  font-size: 14px;
  line-height: 1.8;
  color: #2A323C;
}

.page-contact .pc-contact {
  position: relative;
  background: var(--deep);
  color: var(--paper);
  padding: 0 0 var(--s-4);
  box-shadow: var(--shadow-lift);
}

.page-contact .pc-contact__figure {
  overflow: hidden;
  background: var(--deep-2);
}

.page-contact .pc-contact__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  opacity: 0.88;
}

.page-contact .pc-contact__title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--yellow);
  margin: var(--s-3) var(--s-3) var(--s-2);
}

.page-contact .pc-contact__list {
  margin: 0;
  padding: 0 var(--s-3);
}

.page-contact .pc-contact__row {
  display: grid;
  grid-template-columns: 5.5em 1fr;
  gap: var(--s-2);
  padding: var(--s-2) 0;
  border-bottom: 1px dashed var(--line-on-deep);
}

.page-contact .pc-contact__row dt {
  font-size: 13px;
  color: rgba(244, 241, 233, 0.62);
}

.page-contact .pc-contact__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.page-contact .pc-contact__row a {
  color: var(--paper);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .pc-contact__row a:hover,
.page-contact .pc-contact__row a:focus-visible {
  color: var(--yellow);
}

.page-contact .pc-contact__note {
  margin: var(--s-3) var(--s-3) 0;
  font-size: 13px;
  line-height: 1.8;
  color: rgba(244, 241, 233, 0.72);
}

.page-contact .pc-contact__legal {
  margin: var(--s-3) var(--s-3) 0;
  padding-top: var(--s-2);
  border-top: 1px solid var(--line-on-deep);
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(244, 241, 233, 0.56);
}

/* ---------- 焦点环 ---------- */
.page-contact a:focus-visible,
.page-contact summary:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
}

/* ---------- 悬停展开（仅指针设备） ---------- */
@media (hover: hover) and (pointer: fine) {
  .page-contact .pc-dir__more {
    grid-template-rows: 0fr;
    opacity: 0;
    transition: grid-template-rows 0.28s ease, opacity 0.28s ease;
  }

  .page-contact .pc-dir:hover .pc-dir__more,
  .page-contact .pc-dir:focus-within .pc-dir__more {
    grid-template-rows: 1fr;
    opacity: 1;
  }
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-contact .pc-flow__details {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .pc-faq__item summary {
    font-size: 18px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-contact .pc-hero {
    padding: calc(var(--header-h) + 72px) 0 var(--s-12);
  }

  .page-contact .pc-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
    gap: var(--s-7);
  }

  .page-contact .pc-hero__aside {
    border-top: none;
    border-left: 1px solid var(--line-on-deep);
    padding: 0 0 0 var(--s-3);
  }

  .page-contact .pc-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: var(--s-12);
  }

  .page-contact .pc-banner img {
    aspect-ratio: 21 / 9;
  }

  .page-contact .pc-dirs {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .pc-dir {
    padding: var(--s-4) var(--s-3);
  }

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

  .page-contact .pc-flow__step a {
    grid-template-columns: 1fr;
    gap: 6px;
    height: 100%;
  }

  .page-contact .pc-flow__details {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .pc-intent {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
    gap: var(--s-7);
  }

  .page-contact .pc-intent__checklist {
    padding: var(--s-7) var(--s-4);
  }

  .page-contact .pc-contact__title {
    margin-top: var(--s-4);
  }
}

@media (min-width: 1180px) {
  .page-contact .pc-flow__details {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-contact .pc-dir,
  .page-contact .pc-dir__more,
  .page-contact .pc-flow__step a {
    transition: none;
  }

  .page-contact .pc-dir__more {
    grid-template-rows: 1fr;
    opacity: 1;
  }
}