.page-contact {
  --coop-glass: rgba(28, 28, 34, .58);
  --coop-hair: 1px solid rgba(200, 164, 92, .45);
  --coop-hair-soft: 1px solid rgba(223, 223, 228, .16);
  --coop-shadow: 0 30px 64px -42px rgba(10, 10, 12, .82);
  --coop-ink-soft: rgba(246, 239, 230, .72);
}

.page-contact .section--dark .kicker { color: var(--gold); }
.page-contact .section--ivory .kicker { color: var(--gold-deep); }
.page-contact .section--dark .lede { color: rgba(246, 239, 230, .8); }
.page-contact .section--ivory .lede { color: var(--graphite); }
.page-contact .section--dark h2,
.page-contact .section--dark h3 { color: var(--ivory); }
.page-contact .section--ivory h2,
.page-contact .section--ivory h3 { color: var(--black); }

/* ---------- 面包屑 ---------- */
.page-contact .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: clamp(22px, 4vw, 34px);
}
.page-contact .section--dark .breadcrumb,
.page-contact .section--dark .breadcrumb a {
  color: rgba(246, 239, 230, .66);
  font-family: var(--font-mono);
  font-size: var(--s2);
  letter-spacing: .08em;
}
.page-contact .section--dark .breadcrumb a:hover { color: var(--pink-bright); }
.page-contact .breadcrumb__sep { color: var(--gold); }

/* ---------- 首屏 ---------- */
.page-contact .coop-hero {
  position: relative;
  overflow: hidden;
}
.page-contact .coop-hero::before {
  content: "";
  position: absolute;
  inset: auto 42% -42% -12%;
  height: 76%;
  background: radial-gradient(closest-side, rgba(228, 0, 127, .3), transparent 72%);
  pointer-events: none;
}
.page-contact .coop-hero > .shell {
  position: relative;
  z-index: 2;
}
.page-contact .coop-hero__grid {
  display: grid;
  gap: clamp(28px, 5vw, 52px);
  align-items: center;
}
.page-contact .coop-hero h1 {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(1.9rem, 4.6vw, 3.4rem);
  line-height: 1.16;
  letter-spacing: -0.02em;
  margin: 14px 0 18px;
  max-width: 22ch;
}
.page-contact .coop-hero .lede {
  max-width: 40ch;
  font-size: var(--s3);
}
.page-contact .coop-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}
.page-contact .coop-hero__facts {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-contact .coop-hero__facts li {
  border-top: var(--coop-hair);
  padding-top: 12px;
  font-size: var(--s2);
  color: var(--coop-ink-soft);
  line-height: 1.6;
}
.page-contact .coop-hero__num {
  display: block;
  color: var(--gold);
  font-size: var(--s4);
  letter-spacing: .06em;
  margin-bottom: 6px;
}
.page-contact .coop-hero__figure {
  margin: 0;
}
.page-contact .coop-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-contact .coop-hero__figure .media-frame__caption {
  color: rgba(246, 239, 230, .6);
  font-size: var(--s1);
}

/* ---------- 章节标题 ---------- */
.page-contact .coop-section-head {
  max-width: 46rem;
  margin-bottom: clamp(32px, 5vw, 56px);
}
.page-contact .coop-section-head h2 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.55rem, 3vw, 2.3rem);
  line-height: 1.24;
  letter-spacing: -0.01em;
  margin: 12px 0 14px;
}
.page-contact .coop-section-head .lede { max-width: 42ch; }

/* ---------- 三类合作形式 ---------- */
.page-contact .coop-forms__grid {
  display: grid;
  gap: 22px;
}
.page-contact .coop-form {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
  background: var(--white);
  border: var(--coop-hair);
  padding: clamp(24px, 3vw, 32px);
  transition: transform var(--t) var(--ease), box-shadow var(--t) var(--ease);
}
.page-contact .coop-form::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 52px;
  height: 3px;
  background: var(--pink);
}
.page-contact .coop-form:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}
.page-contact .coop-form__index {
  color: var(--gold-deep);
  font-size: var(--s2);
}
.page-contact .coop-form__title {
  font-family: var(--font-serif);
  font-size: var(--s4);
  font-weight: 700;
  margin: 0;
}
.page-contact .coop-form__text {
  margin: 0;
  font-size: var(--s3);
  line-height: 1.75;
  color: var(--graphite);
}
.page-contact .coop-form__meta {
  margin: auto 0 0;
  padding-top: 14px;
  border-top: var(--hair);
}
.page-contact .coop-form__meta dt {
  font-family: var(--font-mono);
  font-size: var(--s1);
  letter-spacing: .08em;
  color: var(--pink);
  margin-bottom: 6px;
}
.page-contact .coop-form__meta dd {
  margin: 0;
  font-size: var(--s2);
  line-height: 1.7;
  color: var(--black);
}
.page-contact .coop-form__more summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 12px;
  border-top: var(--hair);
  font-family: var(--font-mono);
  font-size: var(--s2);
  letter-spacing: .08em;
  color: var(--gold-deep);
}
.page-contact .coop-form__more summary::-webkit-details-marker { display: none; }
.page-contact .coop-form__more summary::after {
  content: "＋";
  color: var(--pink);
  font-size: var(--s3);
}
.page-contact .coop-form__more[open] summary::after { content: "－"; }
.page-contact .coop-form__more p {
  margin: 10px 0 0;
  font-size: var(--s2);
  line-height: 1.75;
  color: var(--graphite);
}

/* ---------- 流程步骤条 ---------- */
.page-contact .coop-flow__track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}
.page-contact .coop-step {
  position: relative;
  border-top: var(--coop-hair);
  padding: 18px 0 4px;
}
.page-contact .coop-step::before {
  content: "";
  position: absolute;
  top: -4px;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--pink);
  box-shadow: 0 0 0 3px rgba(228, 0, 127, .2);
}
.page-contact .coop-step summary {
  cursor: pointer;
  list-style: none;
  display: grid;
  gap: 6px;
}
.page-contact .coop-step summary::-webkit-details-marker { display: none; }
.page-contact .coop-step__num {
  color: var(--pink-bright);
  font-size: var(--s2);
}
.page-contact .coop-step__title {
  font-family: var(--font-serif);
  font-size: var(--s4);
  color: var(--ivory);
  transition: color var(--t) var(--ease);
}
.page-contact .coop-step__time {
  color: var(--gold);
  font-size: var(--s1);
}
.page-contact .coop-step[open] .coop-step__title,
.page-contact .coop-step summary:hover .coop-step__title {
  color: var(--pink-bright);
}
.page-contact .coop-step p {
  margin: 12px 0 0;
  font-size: var(--s2);
  line-height: 1.8;
  color: var(--coop-ink-soft);
}

/* ---------- 合作方类型 ---------- */
.page-contact .coop-partners__grid {
  display: grid;
  gap: 20px;
}
.page-contact .coop-partner {
  background: var(--white);
  border: var(--hair);
  padding: clamp(22px, 3vw, 30px);
  display: grid;
  gap: 10px;
}
.page-contact .coop-partner__idx {
  color: var(--gold-deep);
  font-size: var(--s2);
}
.page-contact .coop-partner h3 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: var(--s4);
  font-weight: 700;
}
.page-contact .coop-partner__need,
.page-contact .coop-partner__entry {
  margin: 0;
  font-size: var(--s2);
  line-height: 1.78;
  color: var(--graphite);
}
.page-contact .coop-partner__entry {
  border-top: var(--hair);
  padding-top: 12px;
  color: var(--black);
}
.page-contact .coop-partner__entry strong { color: var(--pink); }

/* ---------- 联系卡片（玻璃层） ---------- */
.page-contact .coop-contact { position: relative; }
.page-contact .coop-contact__card {
  position: relative;
  overflow: hidden;
  border: var(--coop-hair);
  border-radius: 20px;
  padding: clamp(26px, 4vw, 50px);
  background: linear-gradient(155deg, rgba(28, 28, 34, .88) 0%, rgba(10, 10, 12, .72) 100%);
  backdrop-filter: blur(14px) saturate(120%);
  -webkit-backdrop-filter: blur(14px) saturate(120%);
  box-shadow: var(--coop-shadow);
}
.page-contact .coop-contact__glow {
  position: absolute;
  top: -34%;
  right: -16%;
  width: 58%;
  height: 150%;
  background: radial-gradient(closest-side, rgba(228, 0, 127, .34), transparent 72%);
  pointer-events: none;
}
.page-contact .coop-contact__head {
  position: relative;
  max-width: 44rem;
}
.page-contact .coop-contact__head h2 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.5rem, 2.9vw, 2.2rem);
  line-height: 1.24;
  margin: 12px 0 14px;
}
.page-contact .coop-contact__list {
  position: relative;
  list-style: none;
  margin: clamp(26px, 3.5vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 24px;
}
.page-contact .coop-contact__list li {
  border-top: var(--coop-hair);
  padding-top: 14px;
  display: grid;
  gap: 8px;
  align-content: start;
}
.page-contact .coop-contact__label {
  color: var(--gold);
  font-size: var(--s2);
}
.page-contact .coop-contact__value {
  font-size: var(--s3);
  font-weight: 600;
  color: var(--ivory);
  line-height: 1.5;
  overflow-wrap: anywhere;
}
.page-contact .coop-contact__note {
  font-size: var(--s2);
  line-height: 1.72;
  color: var(--coop-ink-soft);
}

/* ---------- 来函材料 ---------- */
.page-contact .coop-materials__grid {
  display: grid;
  gap: clamp(28px, 4vw, 46px);
  align-items: center;
}
.page-contact .coop-materials__text h2 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.5rem, 2.9vw, 2.2rem);
  line-height: 1.24;
  margin: 12px 0 14px;
}
.page-contact .coop-materials__text .lede { max-width: 40ch; }
.page-contact .coop-materials__list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: var(--hair);
}
.page-contact .coop-materials__list li {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-bottom: var(--hair);
}
.page-contact .coop-materials__idx {
  color: var(--gold-deep);
  font-size: var(--s2);
  padding-top: 3px;
}
.page-contact .coop-materials__list strong {
  display: block;
  font-size: var(--s3);
  color: var(--black);
  margin-bottom: 4px;
}
.page-contact .coop-materials__list p {
  margin: 0;
  font-size: var(--s2);
  line-height: 1.72;
  color: var(--graphite);
}
.page-contact .coop-materials__figure {
  margin: 0;
}
.page-contact .coop-materials__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-contact .coop-materials__figure .media-frame__caption {
  color: var(--graphite);
  font-size: var(--s1);
}

/* ---------- 常见问题 ---------- */
.page-contact .coop-faq__list {
  border-top: var(--coop-hair);
}
.page-contact .coop-faq__item {
  border-bottom: var(--coop-hair-soft);
}
.page-contact .coop-faq__item summary {
  cursor: pointer;
  list-style: none;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  padding: 20px 0;
}
.page-contact .coop-faq__item summary::-webkit-details-marker { display: none; }
.page-contact .coop-faq__item summary .mono {
  color: var(--gold);
  font-size: var(--s2);
}
.page-contact .coop-faq__q {
  font-family: var(--font-serif);
  font-size: var(--s4);
  color: var(--ivory);
  transition: color var(--t) var(--ease);
}
.page-contact .coop-faq__item summary::after {
  content: "＋";
  font-family: var(--font-mono);
  font-size: var(--s3);
  color: var(--pink-bright);
}
.page-contact .coop-faq__item[open] summary::after { content: "－"; }
.page-contact .coop-faq__item[open] .coop-faq__q,
.page-contact .coop-faq__item summary:hover .coop-faq__q {
  color: var(--pink-bright);
}
.page-contact .coop-faq__item p {
  margin: 0 0 22px;
  padding-left: 52px;
  max-width: 52em;
  font-size: var(--s3);
  line-height: 1.8;
  color: var(--coop-ink-soft);
}
.page-contact .coop-faq__tail {
  margin: clamp(28px, 4vw, 42px) 0 0;
  max-width: 52em;
  font-size: var(--s2);
  line-height: 1.85;
  color: var(--coop-ink-soft);
}
.page-contact .coop-faq__tail a {
  color: var(--pink-bright);
  border-bottom: 1px solid rgba(255, 95, 162, .45);
  text-decoration: none;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease);
}
.page-contact .coop-faq__tail a:hover {
  color: var(--gold);
  border-color: rgba(200, 164, 92, .6);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .coop-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (min-width: 760px) {
  .page-contact .coop-partners__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-contact .coop-contact__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
  }
}

@media (min-width: 860px) {
  .page-contact .coop-forms__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-contact .coop-hero__grid {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, .84fr);
  }
  .page-contact .coop-materials__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  }

  .page-contact .coop-flow__track {
    position: relative;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 16px;
    align-items: start;
  }
  .page-contact .coop-flow__track::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: rgba(200, 164, 92, .45);
  }
  .page-contact .coop-step {
    border-top: none;
    padding-top: 22px;
  }
  .page-contact .coop-step::before {
    top: -3px;
  }
}

@media (min-width: 1100px) {
  .page-contact .coop-faq__item p {
    padding-left: 0;
    margin-left: 52px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .coop-form,
  .page-contact .coop-step__title,
  .page-contact .coop-faq__q {
    transition: none;
  }
  .page-contact .coop-form:hover { transform: none; }
}
</main>