/* ===== 合作洽谈 / cooperation ===== */
.page-contact {
  --co-gap: clamp(22px, 3.2vw, 44px);
  --co-rule-d: rgba(243, 247, 236, 0.16);
  --co-rule-l: rgba(14, 21, 18, 0.14);
  --co-shadow-lift: 0 26px 50px -34px rgba(14, 21, 18, 0.7);
}

/* ---------- 通用段落头 ---------- */
.page-contact .co-section-head {
  max-width: 62ch;
  margin-bottom: clamp(26px, 4vw, 42px);
}

.page-contact .co-section-head .h2 {
  margin: 10px 0 12px;
  line-height: 1.08;
  letter-spacing: -0.01em;
}

.page-contact .co-section-head__lede {
  margin: 0;
  font-size: 17px;
  line-height: 1.68;
  color: var(--ink-soft);
}

.page-contact .co-section-head--dark .h2 {
  color: var(--c-flesh);
}

.page-contact .co-section-head--dark .co-section-head__lede {
  color: var(--on-dark-soft);
}

/* ---------- 首屏 ---------- */
.page-contact .co-hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(20px, 3vw, 32px);
  padding-bottom: clamp(52px, 7vw, 100px);
}

.page-contact .co-hero::before {
  content: "";
  position: absolute;
  top: -20%;
  right: -16%;
  width: min(72vw, 720px);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: radial-gradient(circle at 38% 34%, rgba(79, 191, 63, 0.34), rgba(14, 21, 18, 0) 66%);
  pointer-events: none;
}

.page-contact .co-hero__shell {
  position: relative;
  z-index: 1;
}

.page-contact .co-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-bottom: clamp(22px, 3vw, 34px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-contact .co-crumbs .crumbs__link {
  color: var(--on-dark-soft);
  text-decoration: none;
  transition: color 0.25s var(--ease);
}

.page-contact .co-crumbs .crumbs__link:hover {
  color: var(--c-lime);
}

.page-contact .co-crumbs .crumbs__sep {
  color: rgba(243, 247, 236, 0.3);
}

.page-contact .co-crumbs .crumbs__current {
  color: var(--c-lime);
}

.page-contact .co-hero__grid {
  display: grid;
  gap: clamp(30px, 5vw, 58px);
  align-items: center;
}

@media (min-width: 980px) {
  .page-contact .co-hero__grid {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
  }
}

.page-contact .co-hero__title {
  margin: 14px 0 0;
  color: var(--c-flesh);
  font-size: clamp(2.3rem, 7.4vw, 4.9rem);
  line-height: 1.0;
  letter-spacing: -0.035em;
}

.page-contact .co-hero__title-em {
  display: block;
  width: 84px;
  height: 8px;
  margin-top: 18px;
  border-radius: var(--r-pill);
  background: linear-gradient(90deg, var(--c-lime), var(--c-kiwi));
}

.page-contact .co-hero__lede {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  max-width: 46ch;
  color: var(--on-dark);
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.72;
}

.page-contact .co-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-contact .co-hero__facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(10px, 2vw, 22px);
  margin: clamp(30px, 4vw, 46px) 0 0;
  padding-top: clamp(20px, 3vw, 28px);
  border-top: 1px dashed var(--co-rule-d);
}

.page-contact .co-fact {
  min-width: 0;
}

.page-contact .co-fact dt {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--on-dark-soft);
}

.page-contact .co-fact dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 2.6vw, 1.5rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--c-lime);
}

.page-contact .co-hero__media {
  margin: 0;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--co-rule-d);
  border-radius: var(--r-lg);
  border-bottom-left-radius: 0;
  box-shadow: 0 30px 60px -42px rgba(0, 0, 0, 0.95);
}

.page-contact .co-hero__media .media__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.page-contact .co-hero__media .media__cap {
  display: block;
  padding: 12px 16px;
  font-size: 12px;
  line-height: 1.55;
  color: var(--on-dark-soft);
  border-top: 1px solid var(--co-rule-d);
  background: rgba(14, 21, 18, 0.55);
}

/* ---------- 合作类型 ---------- */
.page-contact .co-types {
  padding-top: clamp(48px, 7vw, 92px);
  padding-bottom: clamp(48px, 7vw, 92px);
}

.page-contact .co-tabs {
  margin-top: clamp(4px, 1vw, 10px);
}

.page-contact .co-tabs__list {
  display: flex;
  gap: 8px;
  margin: 0 0 clamp(20px, 3vw, 30px);
  padding-bottom: 4px;
  overflow-x: auto;
  scrollbar-width: thin;
}

@media (min-width: 720px) {
  .page-contact .co-tabs__list {
    flex-wrap: wrap;
    overflow: visible;
    padding-bottom: 0;
  }
}

.page-contact .co-tabs__btn {
  flex: 0 0 auto;
  padding: 11px 20px;
  border: 1px solid var(--co-rule-l);
  border-radius: var(--r-pill);
  background: rgba(255, 255, 255, 0.6);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-contact .co-tabs__btn:hover {
  border-color: var(--c-kiwi);
  color: var(--c-board);
}

.page-contact .co-tabs__btn[aria-selected="true"] {
  background: var(--c-board);
  border-color: var(--c-board);
  color: var(--c-lime);
}

.page-contact .co-tabs__panel {
  padding: clamp(22px, 3.4vw, 34px);
  border: 1px solid var(--co-rule-l);
  border-left: 5px solid var(--c-kiwi);
  border-radius: var(--r-md);
  background: #ffffff;
  box-shadow: var(--shadow-sheet);
}

.page-contact .co-tabs__panel[hidden] {
  display: none;
}

.page-contact .co-types__body {
  display: grid;
  gap: clamp(14px, 2.2vw, 20px);
}

.page-contact .co-types__fit {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink);
}

.page-contact .co-types__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-contact .co-types__list li {
  position: relative;
  padding-left: 22px;
  font-size: 16px;
  line-height: 1.68;
  color: var(--ink-soft);
}

.page-contact .co-types__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--c-kiwi);
}

.page-contact .co-types__out {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  margin: 0;
  padding-top: clamp(12px, 2vw, 18px);
  border-top: 1px dashed var(--co-rule-l);
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}

/* ---------- 对接流程 ---------- */
.page-contact .co-flow {
  padding-top: clamp(48px, 7vw, 92px);
  padding-bottom: clamp(48px, 7vw, 92px);
}

.page-contact .co-flow__list {
  display: grid;
  gap: clamp(14px, 2.2vw, 22px);
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 700px) {
  .page-contact .co-flow__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1060px) {
  .page-contact .co-flow__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-contact .co-step {
  position: relative;
  padding: clamp(20px, 2.6vw, 26px);
  border: 1px solid var(--co-rule-d);
  border-radius: var(--r-md);
  background: rgba(243, 247, 236, 0.04);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), background 0.35s var(--ease);
}

.page-contact .co-step:hover {
  transform: translateY(-4px);
  border-color: rgba(79, 191, 63, 0.6);
  background: rgba(79, 191, 63, 0.1);
}

.page-contact .co-step__idx {
  display: inline-block;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--c-kiwi);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--c-lime);
}

.page-contact .co-step__title {
  margin: 0 0 10px;
  font-size: 1.15rem;
  line-height: 1.3;
  color: var(--c-flesh);
}

.page-contact .co-step__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--on-dark-soft);
}

/* ---------- 准备清单 + 联系卡 ---------- */
.page-contact .co-desk {
  padding-top: clamp(48px, 7vw, 92px);
  padding-bottom: clamp(48px, 7vw, 92px);
}

.page-contact .co-desk__grid {
  display: grid;
  gap: clamp(30px, 4vw, 48px);
}

@media (min-width: 960px) {
  .page-contact .co-desk__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }
}

.page-contact .co-desk__col {
  min-width: 0;
}

.page-contact .co-prep {
  display: grid;
  gap: clamp(12px, 2vw, 18px);
}

@media (min-width: 640px) {
  .page-contact .co-prep {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-contact .co-prep__item {
  display: grid;
  gap: 8px;
  padding: clamp(16px, 2.2vw, 22px);
  border: 1px solid var(--co-rule-l);
  border-radius: var(--r-md);
  background: #ffffff;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-contact .co-prep__item:hover {
  transform: translateY(-3px);
  box-shadow: var(--co-shadow-lift);
}

.page-contact .co-prep__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-kiwi);
}

.page-contact .co-prep__title {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.35;
}

.page-contact .co-prep__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-contact .co-desk__figure {
  margin: clamp(22px, 4vw, 36px) 0 0;
  overflow: hidden;
  border-radius: var(--r-md);
  border: 1px solid var(--co-rule-l);
}

.page-contact .co-desk__figure .media__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-contact .co-desk__figure .media__cap {
  display: block;
  padding: 12px 16px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--ink-soft);
  background: rgba(14, 21, 18, 0.04);
}

.page-contact .co-desk__note {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-contact .co-desk__note a {
  color: #2f7a2a;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .co-contact {
  min-width: 0;
}

@media (min-width: 960px) {
  .page-contact .co-contact {
    position: sticky;
    top: calc(var(--bar-h) + 24px);
  }
}

.page-contact .co-contact__inner {
  padding: clamp(22px, 3vw, 32px);
  border: 1px solid rgba(215, 255, 62, 0.26);
  border-radius: var(--r-lg);
  background:
    linear-gradient(158deg, rgba(79, 191, 63, 0.2), rgba(14, 21, 18, 0) 58%),
    var(--c-board);
  color: var(--c-flesh);
  box-shadow: var(--co-shadow-lift);
}

.page-contact .co-contact__title {
  margin: 8px 0 0;
  color: var(--c-flesh);
  line-height: 1.28;
}

.page-contact .co-contact__list {
  display: grid;
  gap: 0;
  margin: clamp(18px, 2.4vw, 26px) 0 0;
}

.page-contact .co-contact__row {
  display: grid;
  gap: 5px;
  padding: 14px 0;
  border-top: 1px dashed var(--co-rule-d);
}

.page-contact .co-contact__key {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--on-dark-soft);
}

.page-contact .co-contact__val {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(0.95rem, 2.5vw, 1.06rem);
  font-weight: 600;
  line-height: 1.5;
  color: var(--c-lime);
  word-break: break-word;
}

.page-contact .co-contact__note {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--on-dark);
}

.page-contact .co-contact__cta {
  display: block;
  margin-top: clamp(20px, 3vw, 26px);
  text-align: center;
}

/* ---------- 常见合作问题 ---------- */
.page-contact .co-faq {
  padding-top: clamp(48px, 7vw, 92px);
  padding-bottom: clamp(48px, 7vw, 92px);
}

.page-contact .co-faq__list {
  display: grid;
  gap: 10px;
}

.page-contact .co-faq__item {
  border: 1px solid var(--co-rule-l);
  border-radius: var(--r-md);
  background: #ffffff;
  overflow: hidden;
}

.page-contact .co-faq__q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: clamp(15px, 2vw, 19px) clamp(16px, 2.4vw, 24px);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

.page-contact .co-faq__q::-webkit-details-marker {
  display: none;
}

.page-contact .co-faq__q::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--c-kiwi);
  transition: transform 0.3s var(--ease);
}

.page-contact .co-faq__item[open] .co-faq__q::after {
  transform: rotate(45deg);
}

.page-contact .co-faq__item[open] .co-faq__q {
  color: var(--c-board);
}

.page-contact .co-faq__a {
  padding: 0 clamp(16px, 2.4vw, 24px) clamp(16px, 2.2vw, 20px);
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-contact .co-faq__a p {
  margin: 0;
}

.page-contact .co-faq__more {
  margin: clamp(20px, 3vw, 28px) 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-contact .co-faq__more a {
  color: #2f7a2a;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 收尾 ---------- */
.page-contact .co-outro {
  padding-top: clamp(44px, 6vw, 76px);
  padding-bottom: clamp(48px, 7vw, 88px);
}

.page-contact .co-outro__inner {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  align-items: center;
}

@media (min-width: 860px) {
  .page-contact .co-outro__inner {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  }
}

.page-contact .co-outro__copy .h2 {
  margin: 0 0 12px;
  color: var(--c-flesh);
  line-height: 1.12;
}

.page-contact .co-outro__lede {
  margin: 0;
  max-width: 52ch;
  font-size: 16px;
  line-height: 1.7;
  color: var(--on-dark-soft);
}

.page-contact .co-outro__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .co-step,
  .page-contact .co-prep__item,
  .page-contact .co-tabs__btn,
  .page-contact .co-faq__q::after {
    transition: none;
  }
  .page-contact .co-step:hover,
  .page-contact .co-prep__item:hover {
    transform: none;
  }
}
</main>