.page-contact {
  --pc-line: var(--hairline);
  --pc-line-strong: var(--hairline-strong);
  display: block;
}

/* ---------- 顶部 ---------- */
.page-contact .pc-top {
  padding-top: clamp(20px, 3vw, 34px);
  padding-bottom: clamp(18px, 2.6vw, 28px);
}

.page-contact .pc-top .crumb {
  margin-bottom: clamp(20px, 3.4vw, 36px);
}

.page-contact .pc-top__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
  align-items: end;
}

.page-contact .pc-top__kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-contact .pc-top__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 7vw, 52px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--mist);
  text-wrap: balance;
}

.page-contact .pc-top__lede {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--text-dim);
}

.page-contact .pc-top__meta {
  margin: 0;
  display: grid;
  gap: 1px;
  background: var(--pc-line);
  border: 1px solid var(--pc-line);
  box-shadow: var(--shadow-print);
}

.page-contact .pc-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 16px;
  padding: 14px 16px;
  background: var(--bg-2);
}

.page-contact .pc-meta__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.page-contact .pc-meta__val {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--mist);
}

/* ---------- 横幅图 ---------- */
.page-contact .pc-banner {
  margin: 0 auto clamp(34px, 5vw, 60px);
}

.page-contact .pc-banner__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  border: 1px solid var(--pc-line);
  background: var(--bg-2);
}

.page-contact .pc-banner__cap {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 主体：左侧主线 + 右侧章节 ---------- */
.page-contact .pc-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 52px);
}

.page-contact .pc-rail__cap {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--slate);
}

.page-contact .pc-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-contact .pc-rail__item {
  flex: 0 0 auto;
}

.page-contact .pc-rail__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 10px 14px;
  border: 1px solid var(--pc-line);
  background: var(--bg-2);
  color: var(--text-dim);
  text-decoration: none;
  font-size: 13px;
  line-height: 1.4;
  white-space: nowrap;
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.page-contact .pc-rail__link:hover,
.page-contact .pc-rail__link:focus-visible {
  color: var(--mist);
  border-color: var(--pc-line-strong);
}

.page-contact .pc-rail__index {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
}

/* ---------- 章节 ---------- */
.page-contact .pc-sec {
  scroll-margin-top: calc(var(--bar-h) + 24px);
}

.page-contact .pc-sec + .pc-sec {
  margin-top: clamp(40px, 6vw, 72px);
  padding-top: clamp(40px, 6vw, 72px);
  border-top: 1px solid var(--pc-line);
}

.page-contact .pc-sec .chapter__head {
  margin-bottom: 14px;
}

.page-contact .pc-sec .chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.6vw, 34px);
  line-height: 1.24;
  letter-spacing: -0.02em;
  color: var(--mist);
  text-wrap: balance;
}

.page-contact .pc-sec .chapter__lede {
  margin: 0 0 6px;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-contact .pc-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--pc-line-strong);
  padding-bottom: 1px;
}

.page-contact .pc-link:hover,
.page-contact .pc-link:focus-visible {
  color: var(--amber-soft);
  border-bottom-color: var(--amber-soft);
}

.page-contact .pc-sec__cross {
  margin: 22px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--cyan-deep);
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
}

/* ---------- 四类方向 ---------- */
.page-contact .pc-quad {
  margin-top: clamp(22px, 3.2vw, 32px);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}

.page-contact .pc-quad__card {
  display: flex;
  flex-direction: column;
  padding: 20px 20px 22px;
  border: 1px solid var(--pc-line);
  background: var(--surface);
  box-shadow: var(--shadow-print);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.page-contact .pc-quad__card:hover,
.page-contact .pc-quad__card:focus-within {
  border-color: var(--pc-line-strong);
  transform: translate(-1px, -1px);
}

.page-contact .pc-quad__tag {
  align-self: flex-start;
  margin: 0 0 14px;
  padding: 3px 9px;
  background: var(--cyan);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.page-contact .pc-quad__card:nth-child(2) .pc-quad__tag {
  background: var(--cyan-deep);
  color: var(--mist);
}

.page-contact .pc-quad__card:nth-child(3) .pc-quad__tag {
  background: var(--amber);
  color: var(--ink);
}

.page-contact .pc-quad__card:nth-child(4) .pc-quad__tag {
  background: var(--amber-soft);
  color: var(--ink);
}

.page-contact .pc-quad__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.38;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-contact .pc-quad__text {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-dim);
}

.page-contact .pc-quad__fit {
  margin: auto 0 0;
  padding-top: 13px;
  border-top: 1px dashed var(--pc-line);
  font-size: 14px;
  line-height: 1.65;
  color: var(--mist);
}

.page-contact .pc-quad__fitKey {
  display: block;
  margin-bottom: 5px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

/* ---------- 关系示意图 ---------- */
.page-contact .pc-diagram {
  margin: clamp(24px, 3.4vw, 34px) 0 0;
  padding: 12px;
  border: 1px solid var(--pc-line);
  background: var(--bg-2);
}

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

.page-contact .pc-diagram__cap {
  margin: 12px 2px 2px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--text-dim);
}

/* ---------- 四步流程 ---------- */
.page-contact .pc-steps {
  list-style: none;
  margin: clamp(24px, 3.4vw, 34px) 0 0;
  padding: 0;
}

.page-contact .pc-step {
  position: relative;
  margin-left: 5px;
  padding: 0 0 26px 30px;
  border-left: 1px solid var(--pc-line);
}

.page-contact .pc-step:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-contact .pc-step::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 5px;
  width: 9px;
  height: 9px;
  background: var(--cyan);
  border: 1px solid var(--ink);
}

.page-contact .pc-step:nth-child(3)::before {
  background: var(--amber);
}

.page-contact .pc-step__num {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-contact .pc-step__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.4;
  color: var(--mist);
}

.page-contact .pc-step__text {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-dim);
}

.page-contact .pc-step__need {
  margin: 0;
  padding: 9px 12px;
  border-left: 2px solid var(--cyan-deep);
  background: var(--accent-soft);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 准备清单 ---------- */
.page-contact .pc-checklist {
  list-style: none;
  margin: clamp(24px, 3.4vw, 34px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.page-contact .pc-checklist__item {
  position: relative;
  padding: 13px 16px 13px 42px;
  border: 1px solid var(--pc-line);
  background: var(--bg-2);
  font-size: 15px;
  line-height: 1.66;
  font-weight: 600;
  color: var(--mist);
}

.page-contact .pc-checklist__item::before {
  content: "✓";
  position: absolute;
  left: 15px;
  top: 12px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--cyan);
}

/* ---------- 对接安排 ---------- */
.page-contact .pc-cycle {
  margin-top: clamp(24px, 3.4vw, 34px);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}

.page-contact .pc-cycle__cell {
  padding-top: 16px;
  border-top: 3px solid var(--cyan-deep);
}

.page-contact .pc-cycle__cell:nth-child(2) {
  border-top-color: var(--cyan);
}

.page-contact .pc-cycle__cell:nth-child(3) {
  border-top-color: var(--amber);
}

.page-contact .pc-cycle__key {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--slate);
}

.page-contact .pc-cycle__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.4;
  color: var(--mist);
}

.page-contact .pc-cycle__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-dim);
}

/* ---------- 联系方式 ---------- */
.page-contact .pc-contact {
  margin-top: clamp(46px, 7vw, 84px);
  padding: clamp(34px, 5vw, 58px) 0 clamp(38px, 5vw, 62px);
  background: var(--bg-2);
  border-top: 1px solid var(--pc-line-strong);
  scroll-margin-top: calc(var(--bar-h) + 24px);
}

.page-contact .pc-contact__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.6vw, 34px);
  line-height: 1.24;
  letter-spacing: -0.02em;
  color: var(--mist);
}

.page-contact .pc-contact__lede {
  margin: 0 0 clamp(24px, 3.4vw, 34px);
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-contact .pc-channels {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}

.page-contact .pc-channel {
  padding: 18px 18px 20px;
  border: 1px solid var(--pc-line);
  border-left: 3px solid var(--cyan);
  background: var(--surface);
}

.page-contact .pc-channel__tag {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-contact .pc-channel__value {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: clamp(15px, 1.8vw, 18px);
  line-height: 1.5;
  color: var(--amber);
  word-break: break-word;
}

.page-contact .pc-channel__value--text {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  color: var(--mist);
  line-height: 1.7;
}

.page-contact .pc-channel__note {
  display: block;
  font-size: 13px;
  line-height: 1.75;
  color: var(--text-dim);
}

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

  .page-contact .pc-checklist {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 20px;
  }

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

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

@media (min-width: 900px) {
  .page-contact .pc-top__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(260px, 0.85fr);
  }

  .page-contact .pc-body {
    grid-template-columns: 178px minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .pc-rail {
    position: sticky;
    top: calc(var(--bar-h) + 28px);
  }

  .page-contact .pc-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--pc-line);
  }

  .page-contact .pc-rail__item {
    flex: 0 0 auto;
    width: 100%;
  }

  .page-contact .pc-rail__link {
    border: 0;
    border-left: 2px solid transparent;
    margin-left: -1px;
    padding: 13px 12px 13px 18px;
    background: transparent;
    white-space: normal;
  }

  .page-contact .pc-rail__link[data-active] {
    border-left-color: var(--cyan);
    background: var(--accent-soft);
    color: var(--mist);
  }

  .page-contact .pc-rail__link[data-active] .pc-rail__index {
    color: var(--amber);
  }
}

@media (min-width: 1120px) {
  .page-contact .pc-quad {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: calc(var(--gap) * 1.1);
  }

  .page-contact .pc-banner {
    margin-bottom: clamp(46px, 5vw, 72px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .pc-quad__card,
  .page-contact .pc-rail__link {
    transition: none;
  }

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