.page-contact {
  --pc-gap: clamp(16px, 3vw, 28px);
  --pc-muted: rgba(244, 245, 242, 0.72);
  --pc-faint: rgba(244, 245, 242, 0.56);
  background: var(--asphalt-900);
  color: var(--pit-white);
  font-family: var(--font-body);
  padding-bottom: clamp(48px, 7vw, 88px);
}

/* ---------- 首屏 ---------- */
.page-contact .hero {
  position: relative;
  padding: clamp(18px, 3vw, 32px) 0 clamp(30px, 5vw, 56px);
  background:
    repeating-linear-gradient(135deg, rgba(244, 245, 242, 0.03) 0 2px, transparent 2px 10px),
    linear-gradient(180deg, var(--asphalt-800) 0%, var(--asphalt-900) 82%);
  border-bottom: var(--line) solid var(--grid-gray);
}

.page-contact .hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 3px;
  background: linear-gradient(90deg, var(--signal-yellow) 0 18%, var(--grid-gray) 18% 100%);
}

.page-contact .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-index);
  font-size: var(--fs-index);
  letter-spacing: 0.08em;
  color: var(--mist-cyan);
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-contact .breadcrumbs__link {
  color: var(--pit-white);
  text-decoration: none;
  border-bottom: 1px solid var(--grid-gray);
  padding-bottom: 2px;
}

.page-contact .breadcrumbs__link:hover,
.page-contact .breadcrumbs__link:focus-visible {
  color: var(--signal-yellow);
  border-color: var(--signal-yellow);
}

.page-contact .breadcrumbs__sep {
  color: var(--pc-faint);
}

.page-contact .hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-contact .hero__title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(44px, 10vw, 92px);
  line-height: 0.95;
  letter-spacing: 0.01em;
  margin: 14px 0 18px;
}

.page-contact .hero__title em {
  display: block;
  font-style: normal;
  color: var(--signal-yellow);
  letter-spacing: 0.02em;
}

.page-contact .hero .lede {
  color: var(--pc-muted);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  max-width: 34em;
  margin: 0;
}

.page-contact .hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 28px);
}

.page-contact .hero__facts {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  border-top: var(--line) solid var(--grid-gray);
}

.page-contact .hero__facts li {
  padding: 14px 0 0;
  border-bottom: 1px dashed var(--grid-gray);
}

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

.page-contact .hero__facts-num {
  display: block;
  font-family: var(--font-index);
  font-size: clamp(24px, 3.2vw, 32px);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  color: var(--signal-yellow);
  line-height: 1;
}

.page-contact .hero__facts-label {
  display: block;
  margin-top: 8px;
  font-family: var(--font-index);
  font-size: var(--fs-index);
  letter-spacing: 0.06em;
  color: var(--pc-faint);
}

.page-contact .hero__figure {
  margin: 0;
  border: var(--line) solid var(--grid-gray);
  box-shadow: var(--shadow-hard-lg);
  background: var(--deep-ink);
}

.page-contact .hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

.page-contact .hero__figure figcaption {
  padding: 10px 12px;
  border-top: var(--line) solid var(--grid-gray);
  font-family: var(--font-index);
  font-size: var(--fs-index);
  letter-spacing: 0.06em;
  color: var(--pc-faint);
}

@media (min-width: 560px) {
  .page-contact .hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .hero__facts li {
    padding: 14px 14px 0 0;
    border-bottom: 0;
    border-right: 1px dashed var(--grid-gray);
  }

  .page-contact .hero__facts li:last-child {
    border-right: 0;
  }
}

@media (min-width: 920px) {
  .page-contact .hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: end;
  }
}

/* ---------- 主体布局 ---------- */
.page-contact .layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
  padding-top: clamp(32px, 5vw, 56px);
}

.page-contact .main-col {
  min-width: 0;
}

.page-contact .block {
  padding: clamp(26px, 4vw, 44px) 0;
  border-top: var(--line) solid var(--grid-gray);
  scroll-margin-top: var(--sticky-offset);
}

.page-contact .main-col > .block:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-contact .block__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: clamp(16px, 2vw, 22px);
}

.page-contact .block__num {
  font-family: var(--font-index);
  font-size: var(--fs-index);
  letter-spacing: 0.08em;
  color: var(--signal-yellow);
  padding: 3px 7px;
  border: 1px solid var(--signal-yellow);
  line-height: 1;
  flex: none;
}

.page-contact .block__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(24px, 3.4vw, 40px);
  line-height: 1.12;
  letter-spacing: 0.01em;
}

.page-contact .prose {
  max-width: 38em;
  color: var(--pc-muted);
  font-size: 16px;
  line-height: 1.8;
}

.page-contact .prose p {
  margin: 0 0 12px;
}

.page-contact .prose p:last-child {
  margin-bottom: 0;
}

.page-contact .textlink {
  color: var(--signal-yellow);
  text-decoration: none;
  border-bottom: 1px solid var(--signal-yellow);
  margin-right: 16px;
  font-size: 14px;
  line-height: 1.9;
}

.page-contact .textlink:hover,
.page-contact .textlink:focus-visible {
  color: var(--highlight-yellow);
  border-color: var(--highlight-yellow);
}

/* ---------- 版本条 ---------- */
.page-contact .versions {
  list-style: none;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-contact .versions li {
  background: var(--asphalt-800);
  border: var(--line) solid var(--grid-gray);
  border-left: 4px solid var(--mist-cyan);
  padding: 14px 16px 16px;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.page-contact .versions li:hover {
  transform: translateY(-4px);
  border-color: var(--signal-yellow);
  box-shadow: var(--shadow-hard);
}

.page-contact .versions__tag {
  display: inline-block;
  font-family: var(--font-index);
  font-size: var(--fs-index);
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
  color: var(--asphalt-900);
  background: var(--signal-yellow);
  padding: 2px 6px;
  margin-bottom: 8px;
}

.page-contact .versions__name {
  display: block;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 19px;
  letter-spacing: 0.02em;
  margin-bottom: 6px;
}

.page-contact .versions__text {
  display: block;
  color: var(--pc-faint);
  font-size: 14px;
  line-height: 1.7;
}

@media (min-width: 640px) {
  .page-contact .versions {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 流程 ---------- */
.page-contact .flow-figure {
  margin: clamp(18px, 3vw, 26px) 0 0;
  border: var(--line) solid var(--grid-gray);
  background: var(--deep-ink);
}

.page-contact .flow-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 5 / 3;
  object-fit: cover;
}

.page-contact .flow-figure figcaption {
  padding: 10px 12px;
  border-top: var(--line) solid var(--grid-gray);
  font-family: var(--font-index);
  font-size: var(--fs-index);
  letter-spacing: 0.08em;
  color: var(--mist-cyan);
}

.page-contact .flow {
  list-style: none;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-contact .flow__step {
  position: relative;
  background: var(--asphalt-800);
  border: var(--line) solid var(--grid-gray);
  border-top: 4px solid var(--grid-gray);
  padding: 16px 16px 18px;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.page-contact .flow__step:hover,
.page-contact .flow__step:focus-within {
  transform: translateY(-4px);
  border-color: var(--signal-yellow);
  box-shadow: var(--shadow-hard);
}

.page-contact .flow__num {
  display: block;
  font-family: var(--font-index);
  font-size: clamp(20px, 2.4vw, 26px);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  color: var(--signal-yellow);
  line-height: 1;
  margin-bottom: 10px;
}

.page-contact .flow__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 20px;
  letter-spacing: 0.04em;
}

.page-contact .flow__text {
  margin: 0;
  color: var(--pc-muted);
  font-size: 14px;
  line-height: 1.75;
}

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

@media (min-width: 1080px) {
  .page-contact .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .flow__step:nth-child(even) {
    margin-top: 18px;
  }
}

/* ---------- 合作卡片 ---------- */
.page-contact .cards {
  margin-top: clamp(20px, 3vw, 28px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-contact .cards__item {
  background: var(--asphalt-800);
  border: var(--line) solid var(--grid-gray);
  padding: 18px 18px 20px;
  box-shadow: var(--shadow-hard);
}

.page-contact .cards__index {
  display: inline-block;
  font-family: var(--font-index);
  font-size: var(--fs-index);
  letter-spacing: 0.1em;
  color: var(--asphalt-900);
  background: var(--mist-cyan);
  padding: 2px 7px;
  margin-bottom: 12px;
}

.page-contact .cards__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 21px;
  letter-spacing: 0.02em;
}

.page-contact .cards__text {
  margin: 0;
  color: var(--pc-muted);
  font-size: 14px;
  line-height: 1.8;
}

@media (min-width: 760px) {
  .page-contact .cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .cards__item:nth-child(2) {
    margin-top: 18px;
  }
}

/* ---------- 联系渠道 ---------- */
.page-contact .channels {
  list-style: none;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
  border: var(--line) solid var(--grid-gray);
  background: var(--asphalt-800);
}

.page-contact .channel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 15px 16px;
  border-top: 1px solid var(--grid-gray);
}

.page-contact .channel:first-child {
  border-top: 0;
}

.page-contact .channel__k {
  font-family: var(--font-index);
  font-size: var(--fs-index);
  letter-spacing: 0.08em;
  color: var(--mist-cyan);
}

.page-contact .channel__v {
  font-size: 15px;
  line-height: 1.6;
  color: var(--pit-white);
  overflow-wrap: anywhere;
}

.page-contact .channel__v--mono {
  font-family: var(--font-index);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.page-contact .channel__note {
  color: var(--pc-faint);
  font-size: 13px;
  line-height: 1.7;
}

@media (min-width: 720px) {
  .page-contact .channel {
    grid-template-columns: 120px minmax(0, 1fr) minmax(0, 1fr);
    align-items: baseline;
    gap: 18px;
  }

  .page-contact .channel__note {
    text-align: right;
  }
}

/* ---------- 折叠 ---------- */
.page-contact .accordion {
  margin-top: clamp(16px, 2vw, 22px);
  border-top: var(--line) solid var(--grid-gray);
}

.page-contact .accordion__item {
  border-bottom: var(--line) solid var(--grid-gray);
  background: transparent;
}

.page-contact .accordion__trigger {
  cursor: pointer;
  padding: 16px 4px;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 18px;
  letter-spacing: 0.03em;
  color: var(--pit-white);
}

.page-contact .accordion__trigger:hover {
  color: var(--signal-yellow);
}

.page-contact .accordion__panel {
  padding: 0 4px 18px;
  color: var(--pc-muted);
  font-size: 15px;
  line-height: 1.8;
}

.page-contact .accordion__panel p {
  margin: 0 0 10px;
  max-width: 40em;
}

.page-contact .accordion__panel p:last-child {
  margin-bottom: 0;
}

/* ---------- 右侧窄栏 ---------- */
.page-contact .rail {
  display: grid;
  gap: 14px;
  min-width: 0;
}

.page-contact .rail__sticky {
  display: grid;
  gap: 14px;
}

.page-contact .rail-card {
  background: var(--asphalt-800);
  border: var(--line) solid var(--grid-gray);
  padding: 16px 16px 18px;
}

.page-contact .rail-card--accent {
  border-color: var(--signal-yellow);
  box-shadow: var(--shadow-hard);
}

.page-contact .rail-card__label {
  margin: 0 0 10px;
  font-family: var(--font-index);
  font-size: var(--fs-index);
  letter-spacing: 0.1em;
  color: var(--mist-cyan);
  text-transform: uppercase;
}

.page-contact .rail-card--accent .rail-card__label {
  color: var(--signal-yellow);
}

.page-contact .rail-card__big {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 26px;
  letter-spacing: 0.03em;
  line-height: 1.1;
}

.page-contact .rail-card__note {
  margin: 0 0 14px;
  color: var(--pc-faint);
  font-size: 13px;
  line-height: 1.7;
}

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

.page-contact .rail-list li {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--pc-muted);
  line-height: 1.5;
}

.page-contact .rail-contact {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .rail-contact__k {
  display: block;
  font-family: var(--font-index);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--pc-faint);
  margin-bottom: 4px;
}

.page-contact .rail-contact__v {
  display: block;
  font-family: var(--font-index);
  font-size: 13px;
  letter-spacing: 0.01em;
  color: var(--pit-white);
  overflow-wrap: anywhere;
}

@media (min-width: 1000px) {
  .page-contact .layout {
    grid-template-columns: minmax(0, 1.62fr) minmax(300px, 0.78fr);
    align-items: start;
  }

  .page-contact .rail__sticky {
    position: sticky;
    top: var(--sticky-offset);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .versions li,
  .page-contact .flow__step {
    transition: none;
  }

  .page-contact .versions li:hover,
  .page-contact .flow__step:hover,
  .page-contact .flow__step:focus-within {
    transform: none;
  }
}