.page-contact {
  --contact-gap: clamp(22px, 3.2vw, 48px);
  --contact-ease: cubic-bezier(.2, .6, .2, 1);
}

/* ---------- 面包屑与首屏 ---------- */
.page-contact .contact-hero {
  padding-top: clamp(26px, 4vw, 48px);
  padding-bottom: clamp(38px, 6vw, 82px);
  position: relative;
}

.page-contact .contact-hero__grid {
  display: grid;
  gap: var(--contact-gap);
  align-items: end;
}

.page-contact .contact-hero__title {
  margin: 12px 0 20px;
  transform: skewX(-2deg);
  transform-origin: left top;
  max-width: 16ch;
}

.page-contact .contact-hero__title span {
  display: block;
  color: var(--ice);
  text-shadow: 1px 0 0 var(--neon);
}

.page-contact .contact-hero__lede {
  max-width: 38ch;
  color: var(--steel);
}

.page-contact .contact-hero__chips {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .contact-hero__media {
  margin: 0;
  position: relative;
  overflow: hidden;
}

.page-contact .contact-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(.86) contrast(1.06);
}

.page-contact .contact-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--mist) 1px, transparent 1px),
    linear-gradient(90deg, var(--mist) 1px, transparent 1px);
  background-size: 46px 46px;
  opacity: .55;
  pointer-events: none;
}

/* ---------- 联系方式 + 四步阶梯 ---------- */
.page-contact .contact-reach {
  position: relative;
  overflow: hidden;
}

.page-contact .contact-reach__head {
  max-width: 760px;
}

.page-contact .contact-reach__grid {
  display: grid;
  gap: var(--contact-gap);
  margin-top: clamp(26px, 4vw, 46px);
  position: relative;
  z-index: 1;
}

.page-contact .contact-track__row {
  display: grid;
  gap: 8px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.page-contact .contact-track__row:last-child {
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-track__key {
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--ice);
}

.page-contact .contact-track__val {
  font-size: clamp(17px, 2.6vw, 24px);
  color: var(--frost);
  line-height: 1.4;
  word-break: break-word;
}

.page-contact .contact-track__val--text {
  font-family: var(--sans);
  font-weight: 700;
  font-size: clamp(16px, 2.1vw, 20px);
  letter-spacing: -0.01em;
}

.page-contact .contact-track__note {
  font-size: 14px;
  line-height: 1.75;
  color: var(--steel);
  max-width: 44ch;
}

.page-contact .ladder {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-contact .ladder::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 14px;
  bottom: 26px;
  width: 1px;
  background: linear-gradient(180deg, var(--ice), var(--line) 78%, transparent);
}

.page-contact .ladder__step {
  position: relative;
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  gap: 16px;
  padding-bottom: 28px;
}

.page-contact .ladder__step:last-child {
  padding-bottom: 0;
}

.page-contact .ladder__idx {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  font-size: 12px;
  color: var(--frost);
  background: var(--ink);
  border: 1px solid var(--line);
  transition: border-color 160ms var(--contact-ease), color 160ms var(--contact-ease);
}

.page-contact .ladder__step:hover .ladder__idx {
  border-color: var(--ice);
  color: var(--neon);
}

.page-contact .ladder__body h3 {
  margin: 4px 0 8px;
}

.page-contact .ladder__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--steel);
  max-width: 42ch;
}

.page-contact .ladder__jump {
  display: inline-block;
  margin-top: 10px;
  font-size: 13px;
  color: var(--ice);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 160ms var(--contact-ease), color 160ms var(--contact-ease);
}

.page-contact .ladder__jump:hover {
  color: var(--neon);
  border-bottom-color: var(--neon);
}

.page-contact .contact-reach__map {
  margin: clamp(34px, 5vw, 60px) 0 0;
}

.page-contact .contact-reach__map img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  filter: saturate(.8);
}

/* ---------- 四类合作方向 ---------- */
.page-contact .contact-directions .section__head {
  max-width: 720px;
}

.page-contact .cuts {
  display: grid;
  gap: 1px;
  margin-top: clamp(26px, 4vw, 46px);
  background: var(--line);
}

.page-contact .cut {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(24px, 3vw, 38px) clamp(20px, 2.6vw, 30px);
  background: var(--navy);
  border-top: 2px solid var(--line);
  transition: background-color 200ms var(--contact-ease), border-color 200ms var(--contact-ease);
}

.page-contact .cut--ice { border-top-color: var(--ice); }
.page-contact .cut--aurora { border-top-color: var(--aurora); }
.page-contact .cut--signal { border-top-color: var(--signal); }

.page-contact .cut:hover {
  background: #0E1A2C;
}

.page-contact .cut__idx {
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--steel);
}

.page-contact .cut__title {
  margin: 0;
  font-size: clamp(19px, 2.3vw, 24px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--frost);
}

.page-contact .cut__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--steel);
}

.page-contact .cut__more {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ice);
  opacity: 1;
  max-height: none;
  transition: max-height 260ms var(--contact-ease), opacity 200ms var(--contact-ease);
}

/* ---------- 响应时段与材料准备 ---------- */
.page-contact .contact-prep__grid {
  display: grid;
  gap: var(--contact-gap);
}

.page-contact .timeline {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
}

.page-contact .timeline__item {
  display: grid;
  gap: 4px 18px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.page-contact .timeline__item:last-child {
  border-bottom: 1px solid var(--line);
}

.page-contact .timeline__key {
  font-size: 13px;
  color: var(--aurora);
}

.page-contact .timeline__val {
  font-size: 15px;
  line-height: 1.75;
  color: var(--steel);
}

.page-contact .checklist {
  list-style: none;
  counter-reset: ck;
  margin: 24px 0 0;
  padding: 0;
}

.page-contact .checklist__item {
  counter-increment: ck;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 4px 14px;
  padding: 15px 0;
  border-top: 1px solid var(--line);
}

.page-contact .checklist__item:last-child {
  border-bottom: 1px solid var(--line);
}

.page-contact .checklist__item::before {
  content: "0" counter(ck);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.9;
  color: var(--signal);
}

.page-contact .checklist__title {
  font-size: 15px;
  font-weight: 700;
  color: var(--frost);
}

.page-contact .checklist__text {
  grid-column: 2;
  font-size: 14px;
  line-height: 1.75;
  color: var(--steel);
}

/* ---------- 长期合作 ---------- */
.page-contact .contact-support .section__head {
  max-width: 760px;
}

.page-contact .contact-support__grid {
  margin-top: clamp(26px, 4vw, 44px);
}

.page-contact .contact-support__grid .stat {
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-contact .support-note {
  margin-top: clamp(28px, 4vw, 48px);
  border-top: 1px solid var(--line);
  padding-top: 22px;
}

.page-contact .support-note h3 {
  margin: 0 0 16px;
}

.page-contact .support-note__row {
  display: grid;
  gap: 6px 20px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .support-note__key {
  font-size: 13px;
  color: var(--ice);
}

.page-contact .support-note__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--steel);
}

/* ---------- 页尾 ---------- */
.page-contact .contact-tail {
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-contact .contact-tail__list {
  margin-top: clamp(30px, 4vw, 52px);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-contact .contact-hero__chips {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
  }

  .page-contact .timeline__item {
    grid-template-columns: 180px minmax(0, 1fr);
  }

  .page-contact .support-note__row {
    grid-template-columns: 150px minmax(0, 1fr);
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    gap: clamp(34px, 4vw, 68px);
  }

  .page-contact .contact-reach__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
    gap: clamp(34px, 4.4vw, 76px);
  }

  .page-contact .cuts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    align-items: stretch;
    background: transparent;
    gap: 0;
  }

  .page-contact .cut {
    background: var(--navy);
    clip-path: polygon(0 0, 100% 3.5%, 100% 100%, 0 96.5%);
    border-top-width: 2px;
    padding-top: clamp(30px, 3.4vw, 46px);
    padding-bottom: clamp(30px, 3.4vw, 46px);
    margin: 0 1px;
  }

  .page-contact .cut__more {
    max-height: 0;
    opacity: 0;
  }

  .page-contact .cut:hover .cut__more,
  .page-contact .cut:focus-within .cut__more {
    max-height: 180px;
    opacity: 1;
  }

  .page-contact .contact-prep__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(38px, 5vw, 88px);
  }
}

@media (min-width: 1180px) {
  .page-contact .contact-support__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(24px, 3vw, 48px);
  }
}

@media (max-width: 899px) {
  .page-contact .cut__more {
    color: var(--steel);
    border-left: 2px solid var(--line);
    padding-left: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .cut,
  .page-contact .cut__more,
  .page-contact .ladder__idx,
  .page-contact .ladder__jump {
    transition: none;
  }

  .page-contact .contact-hero__title {
    transform: none;
  }
}