/* =========================================================
   商务合作 /cooperation/  —  页面专属样式
   作用域：.page-contact
   ========================================================= */

.page-contact {
  background: var(--deep);
  overflow-x: clip;
}

/* ---------- 01 首屏 ---------- */

.page-contact .contact-hero {
  position: relative;
  padding: clamp(34px, 6vw, 76px) 0 clamp(46px, 7vw, 94px);
  background:
    radial-gradient(900px 520px at 84% -12%, rgba(0, 230, 195, .18), transparent 64%),
    radial-gradient(680px 420px at 2% 108%, rgba(255, 107, 74, .13), transparent 62%),
    linear-gradient(158deg, var(--deep) 0%, var(--deep-2) 46%, var(--night) 100%);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--cobalt) 44%, var(--coral));
  opacity: .78;
}

.page-contact .contact-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4.5vw, 56px);
  align-items: center;
}

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

.page-contact .contact-hero__eyebrow {
  display: inline-block;
  margin-top: 20px;
  color: var(--cyan);
}

.page-contact .contact-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(32px, 5.4vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.03em;
  color: var(--cream);
  max-width: 16ch;
}

.page-contact .contact-hero__lede {
  margin: 20px 0 0;
  max-width: 48ch;
  font-size: clamp(14.5px, 1.35vw, 17px);
  line-height: 1.78;
  color: var(--mist);
}

.page-contact .contact-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 0;
}

.page-contact .contact-hero__media {
  position: relative;
  margin: 0;
  border-radius: 14px 4px 14px 4px;
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 34px 76px -46px rgba(0, 230, 195, .55);
}

.page-contact .contact-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 小标题通用覆盖（浅底） ---------- */

.page-contact .tracks-sec .section-head__index,
.page-contact .flow-sec .section-head__index {
  color: var(--coral);
}

.page-contact .tracks-sec .section-head__title,
.page-contact .flow-sec .section-head__title {
  color: var(--ink);
}

.page-contact .tracks-sec .section-head__sub,
.page-contact .flow-sec .section-head__sub {
  color: rgba(23, 18, 14, .68);
}

.page-contact .tracks-sec .section-head,
.page-contact .flow-sec .section-head {
  max-width: 62ch;
}

/* ---------- 02 合作方向 ---------- */

.page-contact .tracks-sec {
  padding: clamp(50px, 7vw, 96px) 0 clamp(52px, 7vw, 100px);
  background: var(--cream);
  color: var(--ink);
}

.page-contact .tracks {
  margin-top: clamp(28px, 4vw, 52px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-contact .track-card {
  position: relative;
  min-width: 0;
  padding: 26px 26px 28px;
  background: #FFFDF9;
  border: 1px solid var(--line-dark);
  border-radius: 14px 4px 14px 4px;
  transition: transform .3s var(--ease), border-color .3s var(--ease),
              box-shadow .3s var(--ease);
}

.page-contact .track-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-top: 30px solid var(--coral);
  border-left: 30px solid transparent;
  border-radius: 0 4px 0 0;
  opacity: .88;
}

.page-contact .track-card:hover,
.page-contact .track-card:focus-within {
  transform: translateY(-4px);
  border-color: var(--cyan);
  box-shadow: 0 26px 48px -34px rgba(7, 26, 51, .58);
}

.page-contact .track-card__idx {
  display: block;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--coral);
}

.page-contact .track-card__title {
  margin: 10px 0 0;
  font-size: clamp(20px, 2.2vw, 25px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--ink);
}

.page-contact .track-card__desc {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: #3B342D;
}

.page-contact .track-card__row {
  margin: 14px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: #554D44;
}

.page-contact .track-card__row .label {
  display: inline-block;
  margin-right: 8px;
  padding: 3px 9px;
  border-radius: 999px;
  background: rgba(0, 230, 195, .18);
  color: #0E3D36;
  vertical-align: 1px;
}

/* ---------- 03 联系方式 ---------- */

.page-contact .contact-sec {
  position: relative;
  padding: clamp(52px, 7vw, 100px) 0;
  background:
    radial-gradient(780px 470px at 10% 0%, rgba(45, 108, 255, .24), transparent 62%),
    radial-gradient(620px 400px at 96% 100%, rgba(0, 230, 195, .14), transparent 60%),
    linear-gradient(202deg, var(--night) 0%, var(--deep) 60%, var(--deep-2) 100%);
  color: var(--cream);
}

.page-contact .contact-sec__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4.5vw, 56px);
  align-items: center;
}

.page-contact .contact-sec__media {
  margin: 0;
  border-radius: 14px 4px 14px 4px;
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-contact .contact-sec__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-contact .contact-panel {
  min-width: 0;
  padding: clamp(22px, 3vw, 36px);
  border: 1px solid var(--line);
  border-radius: 14px 4px 14px 4px;
  background: rgba(255, 255, 255, .045);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .06);
}

.page-contact .contact-panel__idx {
  color: var(--cyan);
}

.page-contact .contact-panel__title {
  margin: 12px 0 0;
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: var(--cream);
}

.page-contact .contact-lines {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
}

.page-contact .contact-line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
  transition: border-color .26s var(--ease);
}

.page-contact .contact-line:last-child {
  border-bottom: 0;
}

.page-contact .contact-line:hover {
  border-color: var(--line-strong);
}

.page-contact .contact-line__key {
  flex: 0 0 100%;
  color: var(--cyan);
}

.page-contact .contact-line__val {
  flex: 1 1 190px;
  min-width: 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--cream);
  word-break: break-word;
}

.page-contact .contact-line__val--mono {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  letter-spacing: .005em;
}

.page-contact .contact-note {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 10px 14px;
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.page-contact .contact-note p {
  flex: 1 1 200px;
  min-width: 0;
  margin: 0;
  font-size: 13.5px;
  line-height: 1.74;
  color: var(--mist);
}

/* ---------- 04 合作流程 ---------- */

.page-contact .flow-sec {
  padding: clamp(50px, 7vw, 96px) 0;
  background: var(--cream);
  color: var(--ink);
}

.page-contact .flow {
  list-style: none;
  margin: clamp(30px, 4.5vw, 52px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.page-contact .flow__step {
  min-width: 0;
  padding-left: 16px;
  border-left: 2px solid rgba(23, 18, 14, .14);
}

.page-contact .flow__num {
  display: block;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--coral);
}

.page-contact .flow__title {
  margin: 8px 0 0;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.015em;
  color: var(--ink);
}

.page-contact .flow__text {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.74;
  color: #554D44;
}

/* ---------- 05 用户反馈 ---------- */

.page-contact .feedback-sec {
  padding: clamp(52px, 7vw, 96px) 0 clamp(56px, 7vw, 104px);
  background:
    radial-gradient(720px 430px at 90% 0%, rgba(255, 107, 74, .17), transparent 62%),
    linear-gradient(178deg, var(--deep) 0%, var(--night-2) 100%);
  color: var(--cream);
}

.page-contact .feedback__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4.5vw, 56px);
}

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

.page-contact .feedback__index {
  color: var(--coral);
}

.page-contact .feedback__title {
  margin: 12px 0 0;
  font-size: clamp(26px, 3.6vw, 42px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--cream);
  max-width: 16ch;
}

.page-contact .feedback__lede {
  margin: 16px 0 0;
  max-width: 46ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--mist);
}

.page-contact .feedback__link {
  margin: 24px 0 0;
}

.page-contact .fb-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-contact .fb-item {
  min-width: 0;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 14px 4px 14px 4px;
  background: rgba(255, 255, 255, .035);
  transition: transform .28s var(--ease), border-color .28s var(--ease),
              background .28s var(--ease);
}

.page-contact .fb-item:hover,
.page-contact .fb-item:focus-within {
  transform: translateY(-3px);
  border-color: var(--cyan);
  background: var(--panel-cyan);
}

.page-contact .fb-item__title {
  margin: 0;
  font-size: 15.5px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.page-contact .fb-item__text {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.74;
  color: var(--mist);
}

/* ---------- 响应式 ---------- */

@media (min-width: 560px) {
  .page-contact .contact-line__key {
    flex: 0 0 84px;
  }
}

@media (min-width: 720px) {
  .page-contact .fb-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-contact .tracks {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 22px;
  }

  .page-contact .track-card:nth-child(1) {
    grid-column: 1 / span 7;
  }

  .page-contact .track-card:nth-child(2) {
    grid-column: 8 / span 5;
  }

  .page-contact .track-card:nth-child(3) {
    grid-column: 1 / span 5;
  }

  .page-contact .track-card:nth-child(4) {
    grid-column: 6 / span 7;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 7fr);
  }

  .page-contact .contact-sec__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  }

  .page-contact .feedback__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-contact .fb-list {
    gap: 14px;
  }
}

@media (min-width: 880px) {
  .page-contact .flow {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0;
  }

  .page-contact .flow__step {
    position: relative;
    padding: 26px 18px 0;
    border-left: 1px solid rgba(23, 18, 14, .16);
  }

  .page-contact .flow__step:first-child {
    padding-left: 0;
    border-left: 0;
  }

  .page-contact .flow__step::before {
    content: "";
    position: absolute;
    top: 0;
    left: -4px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--coral);
  }

  .page-contact .flow__step:first-child::before {
    left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .track-card,
  .page-contact .fb-item,
  .page-contact .contact-line {
    transition: none;
  }

  .page-contact .track-card:hover,
  .page-contact .track-card:focus-within,
  .page-contact .fb-item:hover,
  .page-contact .fb-item:focus-within {
    transform: none;
  }
}