/* ================= 商务合作 /cooperation/ ================= */
.page-contact {
  --c-line: 2px solid var(--edge);
  background: var(--ink);
  color: var(--paper);
  padding-bottom: clamp(56px, 9vw, 112px);
  overflow-x: clip;
}

.page-contact .section {
  padding-block: clamp(48px, 8vw, 100px);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding-block: clamp(72px, 11vw, 132px) clamp(32px, 5vw, 56px);
  background:
    radial-gradient(110% 82% at 8% -12%, rgba(242, 104, 31, .34), transparent 62%),
    radial-gradient(78% 64% at 102% 2%, rgba(43, 232, 176, .16), transparent 58%),
    var(--ink);
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 2px;
  background: linear-gradient(90deg, var(--mint), var(--orange));
}

.page-contact .contact-hero__inner {
  max-width: 900px;
}

.page-contact .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 clamp(22px, 4vw, 40px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-contact .breadcrumb a {
  color: var(--steel-light);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}

.page-contact .breadcrumb a:hover {
  color: var(--mint);
  border-bottom-color: var(--mint);
}

.page-contact .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--mint);
}

.page-contact h1 {
  margin: 12px 0 22px;
  font-family: var(--font-sans);
  font-size: clamp(33px, 6vw, 64px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--paper-white);
}

.page-contact h1 em {
  font-style: normal;
  color: var(--orange);
}

.page-contact .contact-hero__lede {
  max-width: 60ch;
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.8;
  color: var(--steel-light);
}

.page-contact .contact-hero__jump {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3.6vw, 40px);
}

/* ---------- 开场氛围图 ---------- */
.page-contact .contact-stage {
  position: relative;
  margin: 0;
  border-block: var(--c-line);
  background: var(--ink-deep);
}

.page-contact .contact-stage img {
  display: block;
  width: 100%;
  height: auto;
  max-height: min(62vh, 560px);
  object-fit: cover;
  filter: saturate(1.05) contrast(1.03);
}

.page-contact .contact-stage::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 27, 51, .18) 0%, rgba(11, 27, 51, .04) 40%, rgba(7, 11, 18, .88) 100%);
  pointer-events: none;
}

.page-contact .contact-stage__tag {
  position: absolute;
  left: clamp(18px, 5vw, 64px);
  bottom: clamp(18px, 4vw, 44px);
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  max-width: calc(100% - 36px);
  padding: 10px 18px;
  border: 2px solid var(--mint);
  background: rgba(7, 11, 18, .82);
  color: var(--paper-white);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
}

/* ---------- 章节标题 ---------- */
.page-contact .contact-sec-head {
  max-width: 760px;
  margin-bottom: clamp(26px, 4vw, 48px);
}

.page-contact .contact-sec-head h2 {
  margin: 12px 0 14px;
  font-size: clamp(26px, 3.8vw, 42px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--paper-white);
}

.page-contact .contact-sec-sub {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--steel-light);
}

/* ---------- 合作方向卡片 ---------- */
.page-contact .contact-directions {
  background: var(--ink);
}

.page-contact .contact-cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.4vw, 26px);
}

.page-contact .contact-card {
  display: flex;
  flex-direction: column;
  padding: clamp(22px, 3vw, 32px);
  background: var(--panel);
  border: 2px solid var(--edge);
  box-shadow: var(--shadow-hard);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}

.page-contact .contact-card:hover,
.page-contact .contact-card:focus-within {
  transform: translate(-3px, -3px);
  border-color: var(--orange);
  box-shadow: 10px 10px 0 var(--edge);
}

.page-contact .contact-card__num {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--orange-soft);
}

.page-contact .contact-card h3 {
  margin: 0 0 12px;
  font-size: clamp(19px, 2.2vw, 23px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--paper-white);
}

.page-contact .contact-card > p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--steel-light);
}

.page-contact .contact-card__more {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px dashed rgba(126, 151, 180, .5);
}

.page-contact .contact-card__more summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: clamp(14px, 2.2vw, 20px);
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mint);
}

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

.page-contact .contact-card__more summary::after {
  content: "+";
  font-size: 16px;
  line-height: 1;
  color: var(--mint);
}

.page-contact .contact-card__more[open] summary::after {
  content: "\2212";
}

.page-contact .contact-card__more p {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--paper);
}

/* ---------- 推进流程 ---------- */
.page-contact .contact-process {
  background: linear-gradient(180deg, var(--ink-deep) 0%, var(--ink) 100%);
  border-block: var(--c-line);
}

.page-contact .contact-process__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3vw, 40px);
  align-items: end;
  margin-bottom: clamp(30px, 5vw, 56px);
}

.page-contact .contact-process__head .contact-sec-head {
  margin-bottom: 0;
}

.page-contact .contact-process__media {
  margin: 0;
  border: 2px solid var(--edge);
  box-shadow: var(--shadow-hard);
  background: var(--panel);
}

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

.page-contact .contact-steps {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.4vw, 22px);
}

.page-contact .contact-step {
  position: relative;
  padding: clamp(20px, 2.6vw, 26px);
  background: var(--panel);
  border: 2px solid var(--edge);
  border-left: 4px solid var(--mint);
}

.page-contact .contact-step__dot {
  display: none;
}

.page-contact .contact-step__idx {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--orange-soft);
}

.page-contact .contact-step h3 {
  margin: 0 0 10px;
  font-size: 19px;
  font-weight: 800;
  color: var(--paper-white);
}

.page-contact .contact-step > p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--steel-light);
}

.page-contact .contact-step__need {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed rgba(126, 151, 180, .45);
  font-size: 14px;
  line-height: 1.75;
  color: var(--paper);
}

.page-contact .contact-step__need .tag {
  margin-right: 6px;
}

/* ---------- 合作资源（暖纸章节） ---------- */
.page-contact .contact-assets {
  background: var(--paper);
  color: var(--ink);
  border-block: var(--c-line);
}

.page-contact .contact-assets .eyebrow {
  color: #A63C0B;
}

.page-contact .contact-assets .contact-sec-head h2 {
  color: var(--ink);
}

.page-contact .contact-assets .contact-sec-sub {
  color: #46536B;
}

.page-contact .contact-assets__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: 2px solid var(--edge);
}

.page-contact .contact-asset {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: clamp(18px, 2.6vw, 26px) 0;
  border-bottom: 2px solid var(--edge);
}

.page-contact .contact-asset__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.page-contact .contact-asset h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 800;
  color: var(--ink);
}

.page-contact .contact-asset__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: #46536B;
}

/* ---------- 联系方式面板 ---------- */
.page-contact .contact-reach {
  background:
    radial-gradient(96% 70% at 84% 4%, rgba(43, 232, 176, .12), transparent 60%),
    var(--ink);
}

.page-contact .contact-reach__panel {
  padding: clamp(26px, 4vw, 52px);
  background: linear-gradient(160deg, var(--panel) 0%, var(--ink-deep) 100%);
  border: 2px solid var(--edge);
  box-shadow: var(--shadow-hard);
  transition: border-color .3s ease, box-shadow .3s ease;
}

.page-contact .contact-reach__panel.is-visible {
  border-color: var(--orange);
  box-shadow: 8px 8px 0 var(--edge), 0 0 30px rgba(242, 104, 31, .28);
}

.page-contact .contact-reach__panel h2 {
  margin: 12px 0 14px;
  font-size: clamp(26px, 3.8vw, 42px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--paper-white);
}

.page-contact .contact-reach__lede {
  max-width: 62ch;
  margin: 0 0 clamp(22px, 3.4vw, 34px);
  font-size: 16px;
  line-height: 1.8;
  color: var(--steel-light);
}

.page-contact .contact-channels {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid rgba(126, 151, 180, .35);
}

.page-contact .contact-channel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 7px;
  padding: 20px 0;
  border-bottom: 1px solid rgba(126, 151, 180, .35);
}

.page-contact .contact-channel__label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-contact .contact-channel__value {
  justify-self: start;
  max-width: 100%;
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.2vw, 22px);
  font-weight: 700;
  line-height: 1.35;
  color: var(--paper-white);
  text-decoration: none;
  word-break: break-word;
  border-bottom: 2px solid var(--orange);
  padding-bottom: 2px;
  transition: color .2s ease, border-color .2s ease;
}

.page-contact .contact-channel__value:hover,
.page-contact .contact-channel__value:focus-visible {
  color: var(--mint);
  border-color: var(--mint);
}

.page-contact .contact-channel__value--plain {
  font-family: var(--font-sans);
  font-size: clamp(15px, 1.8vw, 18px);
  font-weight: 600;
  border-bottom-color: rgba(43, 232, 176, .55);
}

.page-contact .contact-channel__note {
  font-size: 14px;
  line-height: 1.75;
  color: var(--steel-light);
}

.page-contact .contact-reach__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3.4vw, 32px);
}

.page-contact .contact-reach__legal {
  margin: 20px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--steel);
}

/* ---------- 回复节奏 ---------- */
.page-contact .contact-reply {
  background: var(--ink);
}

.page-contact .contact-reply__list {
  counter-reset: rp;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(12px, 1.8vw, 18px);
}

.page-contact .contact-reply__list li {
  position: relative;
  padding: 20px 22px 20px 58px;
  background: var(--panel);
  border: 2px solid var(--edge);
}

.page-contact .contact-reply__list li::before {
  counter-increment: rp;
  content: counter(rp, decimal-leading-zero);
  position: absolute;
  left: 20px;
  top: 21px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--mint);
}

.page-contact .contact-reply__list h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
  color: var(--paper-white);
}

.page-contact .contact-reply__list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--steel-light);
}

.page-contact .contact-reply__foot {
  margin: clamp(24px, 3.6vw, 36px) 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--steel-light);
}

.page-contact .contact-reply__foot a {
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 232, 176, .55);
  transition: color .2s ease, border-color .2s ease;
}

.page-contact .contact-reply__foot a:hover {
  color: var(--orange-soft);
  border-bottom-color: var(--orange-soft);
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-contact .contact-process__head {
    grid-template-columns: minmax(0, 1fr) minmax(0, .82fr);
  }

  .page-contact .contact-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .contact-assets__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .contact-asset {
    padding-inline: 22px;
    border-right: 2px solid var(--edge);
  }

  .page-contact .contact-asset:nth-child(2n) {
    border-right: 0;
  }

  .page-contact .contact-reply__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 桌面：横向轮次刻度 ---------- */
@media (min-width: 980px) {
  .page-contact .contact-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
    padding-top: 60px;
  }

  .page-contact .contact-steps::before {
    content: "";
    position: absolute;
    top: 24px;
    left: 8%;
    right: 8%;
    height: 2px;
    background: linear-gradient(90deg, var(--mint), var(--orange));
  }

  .page-contact .contact-step {
    padding: clamp(22px, 2vw, 28px) 20px;
    border-left-width: 2px;
  }

  .page-contact .contact-step + .contact-step {
    margin-left: -2px;
  }

  .page-contact .contact-step:hover {
    border-color: var(--orange);
  }

  .page-contact .contact-step__dot {
    display: block;
    position: absolute;
    top: -40px;
    left: 20px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--ink);
    border: 3px solid var(--mint);
  }

  .page-contact .contact-step:nth-child(4) .contact-step__dot {
    border-color: var(--orange);
  }

  .page-contact .contact-reply__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .contact-reply__list li {
    padding: 22px 20px 22px 20px;
  }

  .page-contact .contact-reply__list li::before {
    position: static;
    display: block;
    margin-bottom: 12px;
  }
}

@media (min-width: 1180px) {
  .page-contact .contact-assets__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .contact-asset {
    border-right: 2px solid var(--edge);
  }

  .page-contact .contact-asset:nth-child(2n) {
    border-right: 2px solid var(--edge);
  }

  .page-contact .contact-asset:nth-child(3n) {
    border-right: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-card,
  .page-contact .contact-reach__panel,
  .page-contact .contact-channel__value,
  .page-contact .contact-reply__foot a {
    transition: none;
  }

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