/* ===== 商务合作 /cooperation/ ===== */

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

/* ---------- 首屏框景 ---------- */

.page-contact .co-hero {
  padding-top: clamp(96px, 16vw, 152px);
  padding-bottom: var(--gap-lg);
}

.page-contact .co-hero .breadcrumbs {
  margin-bottom: var(--gap-md);
}

.page-contact .co-hero__frame {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: clamp(20px, 4vw, 44px);
  background:
    linear-gradient(158deg,
      rgba(255, 255, 255, .94) 0%,
      rgba(255, 255, 255, .62) 52%,
      rgba(227, 241, 236, .74) 100%);
  box-shadow: var(--shadow-md);
}

.page-contact .co-hero__frame::before,
.page-contact .co-hero__frame::after {
  content: "";
  position: absolute;
  left: 50%;
  translate: -50% 0;
  width: min(64%, 460px);
  height: 7px;
  background-image: repeating-linear-gradient(90deg, var(--grass) 0 1px, transparent 1px 11px);
  opacity: .5;
  pointer-events: none;
}

.page-contact .co-hero__frame::before { top: -4px; }
.page-contact .co-hero__frame::after { bottom: -4px; }

.page-contact .co-hero__grid {
  display: grid;
  gap: var(--gap-lg);
}

.page-contact .co-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(30px, 6vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--navy);
}

.page-contact .co-hero__text {
  margin: var(--gap-sm) 0 0;
  max-width: 54ch;
  font-size: clamp(16px, 1.5vw, 17.5px);
  line-height: 1.8;
  color: var(--co-copy);
}

.page-contact .co-hero__actions {
  margin-top: var(--gap-md);
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-sm);
}

.page-contact .co-hero__board {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-radius: var(--r-md);
  padding: clamp(20px, 3vw, 28px);
  background: var(--navy);
  color: var(--paper);
  display: grid;
  gap: var(--gap-sm);
  align-content: start;
}

.page-contact .co-hero__board::after {
  content: "";
  position: absolute;
  right: -46%;
  bottom: -54%;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(23, 163, 127, .58), transparent 68%);
  z-index: -1;
}

.page-contact .co-hero__board-title {
  margin: 0 0 4px;
  font-size: 12px;
  letter-spacing: .3em;
  color: var(--grass-soft);
}

.page-contact .co-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .co-stats__item {
  display: grid;
  gap: 5px;
  padding-top: 14px;
  border-top: 1px dashed rgba(246, 241, 231, .2);
}

.page-contact .co-stats__item:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-contact .co-stats__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 5vw, 36px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: #FFFFFF;
}

.page-contact .co-stats__label {
  font-size: 13px;
  line-height: 1.6;
  color: rgba(246, 241, 231, .74);
}

/* ---------- 四类合作方式卡片带 ---------- */

.page-contact .co-rail {
  list-style: none;
  margin: var(--gap-lg) 0 0;
  padding: 0 0 var(--gap-sm);
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: min(80vw, 296px);
  gap: var(--gap-sm);
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-contact .co-rail::-webkit-scrollbar { height: 4px; }

.page-contact .co-rail::-webkit-scrollbar-thumb {
  border-radius: var(--r-pill);
  background: var(--grass-soft);
}

.page-contact .co-rail__card {
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: var(--gap-md);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: #FFFFFF;
  box-shadow: var(--shadow-sm);
  transition:
    transform .28s var(--ease),
    border-color .28s var(--ease),
    box-shadow .28s var(--ease);
}

.page-contact .co-rail__card--lead {
  background: var(--grass-mist);
  border-color: rgba(14, 124, 102, .3);
}

.page-contact .co-rail__icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: var(--r-sm);
  background: var(--navy);
  color: var(--paper);
}

.page-contact .co-rail__card--lead .co-rail__icon {
  background: var(--grass);
  color: #FFFFFF;
}

.page-contact .co-rail__icon svg {
  display: block;
  width: 22px;
  height: 22px;
}

.page-contact .co-rail__title {
  margin: 4px 0 0;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--navy);
}

.page-contact .co-rail__for {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.65;
  color: var(--grass);
}

.page-contact .co-rail__facts {
  margin: auto 0 0;
  padding-top: var(--gap-sm);
  display: grid;
  gap: 10px;
  font-size: 14px;
  line-height: 1.7;
}

.page-contact .co-rail__fact {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 10px;
  padding-top: 10px;
  border-top: 1px dashed rgba(15, 61, 110, .16);
}

.page-contact .co-rail__fact:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-contact .co-rail__fact dt {
  padding-top: 3px;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--co-copy);
}

.page-contact .co-rail__fact dd {
  margin: 0;
  color: var(--ink);
}

.page-contact .co-rail__hint {
  margin: var(--gap-xs) 0 0;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--co-copy);
}

/* ---------- 对接流程轨道 ---------- */

.page-contact .co-flow__rail {
  position: relative;
  list-style: none;
  margin: var(--gap-lg) 0 0;
  padding: 0;
  max-width: 760px;
  display: grid;
  gap: var(--gap-lg);
}

.page-contact .co-flow__rail::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 16px;
  bottom: 16px;
  width: 2px;
  background-image: repeating-linear-gradient(180deg, rgba(14, 124, 102, .55) 0 6px, transparent 6px 14px);
}

.page-contact .co-flow__step {
  position: relative;
  padding-left: 56px;
}

.page-contact .co-flow__no {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 1.5px solid var(--grass);
  border-radius: 50%;
  background: var(--paper);
  color: var(--grass);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
}

.page-contact .co-flow__name {
  margin: 4px 0 0;
  font-size: 20px;
  font-weight: 800;
  color: var(--navy);
}

.page-contact .co-flow__desc {
  margin: 8px 0 0;
  max-width: 60ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--co-copy);
}

.page-contact .co-flow__figure {
  margin: var(--gap-lg) 0 0;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--paper-deep);
}

.page-contact .co-flow__figure img,
.page-contact .co-prep__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 准备材料 ---------- */

.page-contact .co-prep__grid {
  display: grid;
  gap: var(--gap-lg);
}

.page-contact .co-prep__lead {
  margin: var(--gap-sm) 0 0;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--co-copy);
}

.page-contact .co-prep__list {
  list-style: none;
  margin: var(--gap-md) 0 0;
  padding: 0;
  display: grid;
  gap: var(--gap-sm);
}

.page-contact .co-prep__item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--grass);
  border-radius: var(--r-sm);
  background: #FFFFFF;
}

.page-contact .co-prep__idx {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--grass-mist);
  color: var(--grass);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
}

.page-contact .co-prep__name {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--navy);
}

.page-contact .co-prep__desc {
  margin: 6px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--co-copy);
}

.page-contact .co-prep__figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--paper-deep);
}

/* ---------- 深色联络板 ---------- */

.page-contact .co-board {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(24px, 4.5vw, 52px);
  border-radius: var(--r-lg);
  background: linear-gradient(155deg, var(--navy) 0%, #0A2E52 58%, #08243F 100%);
  color: var(--paper);
  box-shadow: var(--shadow-lg);
}

.page-contact .co-board::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -20%;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(23, 163, 127, .44), transparent 70%);
  z-index: -1;
}

.page-contact .co-board .spec {
  color: var(--grass-soft);
}

.page-contact .co-board__title {
  margin: 10px 0 0;
  color: var(--paper);
}

.page-contact .co-board__lead {
  margin: var(--gap-sm) 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(246, 241, 231, .8);
}

.page-contact .co-board__grid {
  list-style: none;
  margin: var(--gap-lg) 0 0;
  padding: 0;
  display: grid;
  gap: var(--gap-sm);
}

.page-contact .co-board__cell {
  padding: 18px 20px;
  border: 1px solid rgba(246, 241, 231, .16);
  border-radius: var(--r-sm);
  background: rgba(255, 255, 255, .08);
  backdrop-filter: blur(8px);
}

.page-contact .co-board__label {
  margin: 0;
  font-size: 11px;
  letter-spacing: .28em;
  color: var(--grass-soft);
}

.page-contact .co-board__value {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(14px, 2.4vw, 17px);
  line-height: 1.5;
  color: #FFFFFF;
  word-break: break-word;
}

.page-contact .co-board__value--text {
  font-family: var(--font-sans);
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.75;
}

.page-contact .co-board__hint {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(246, 241, 231, .72);
}

/* ---------- 响应时效 ---------- */

.page-contact .co-promise__grid {
  list-style: none;
  margin: var(--gap-lg) 0 0;
  padding: 0;
  display: grid;
  gap: var(--gap-md);
}

.page-contact .co-promise__item {
  padding: 22px 20px;
  border-radius: var(--r-md);
  border-top: 3px solid var(--blue);
  background: var(--blue-mist);
}

.page-contact .co-promise__item:nth-child(2) {
  border-top-color: var(--grass);
  background: var(--grass-mist);
}

.page-contact .co-promise__item:nth-child(3) {
  border-top-color: var(--orange);
  background: rgba(242, 107, 42, .1);
}

.page-contact .co-promise__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--navy);
}

.page-contact .co-promise__desc {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--co-copy);
}

.page-contact .co-promise__foot {
  margin: var(--gap-md) 0 0;
  max-width: 72ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--co-copy);
}

.page-contact .co-promise__foot a {
  color: var(--grass);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 悬停与桌面布局 ---------- */

@media (hover: hover) and (pointer: fine) {
  .page-contact .co-rail__card:hover {
    transform: translateY(-3px);
    border-color: var(--orange);
    box-shadow: var(--shadow-md);
  }
}

@media (min-width: 760px) {
  .page-contact .co-board__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-contact .co-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .85fr);
    align-items: start;
  }

  .page-contact .co-prep__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }

  .page-contact .co-prep__figure {
    position: sticky;
    top: 108px;
  }
}

@media (min-width: 1024px) {
  .page-contact .co-rail {
    grid-auto-flow: row;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    grid-auto-columns: auto;
    gap: var(--gap-md);
    padding-bottom: 0;
    overflow: visible;
  }

  .page-contact .co-rail__hint {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .co-rail__card,
  .page-contact .co-rail__card:hover {
    transform: none;
    transition: opacity .2s linear;
  }
}