.page-contact {
  --pc-r: 16px;
  --pc-gap: clamp(18px, 4vw, 34px);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  background-image:
    radial-gradient(92% 120% at 90% 0%, rgba(46, 125, 255, 0.22), transparent 58%),
    radial-gradient(72% 90% at 0% 100%, rgba(159, 230, 224, 0.10), transparent 62%);
}

.page-contact .contact-hero__inner {
  display: grid;
  gap: var(--pc-gap);
}

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

.page-contact .contact-hero__head .page-head__title {
  letter-spacing: -0.012em;
  line-height: 1.2;
  color: var(--text-strong);
}

.page-contact .contact-hero__head .page-head__lede {
  margin-top: 16px;
  max-width: 34em;
  color: var(--text);
}

.page-contact .anchor-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

.page-contact .anchor-link {
  display: inline-block;
  padding: 7px 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--blue-soft);
  text-decoration: none;
  transition: border-color 0.22s var(--ease), color 0.22s var(--ease);
}

.page-contact .anchor-link:hover,
.page-contact .anchor-link:focus-visible {
  border-color: var(--blue);
  color: var(--text-strong);
}

/* ---------- 联系卡片 ---------- */
.page-contact .contact-card {
  position: relative;
  min-width: 0;
  padding: clamp(20px, 5vw, 30px);
  border: 1px solid var(--line-strong);
  border-radius: var(--pc-r);
  background:
    linear-gradient(155deg, rgba(46, 125, 255, 0.22), rgba(18, 24, 38, 0.62) 52%),
    var(--glass-soft);
  backdrop-filter: blur(8px);
  overflow: hidden;
}

.page-contact .contact-card::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 3px;
  background: linear-gradient(90deg, var(--blue), var(--cyan) 44%, var(--orange));
  opacity: 0.85;
}

.page-contact .contact-card__label {
  margin: 0 0 20px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-contact .contact-card__row + .contact-card__row {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.page-contact .contact-card__k {
  display: block;
  font-size: 0.82rem;
  color: var(--text-dim);
}

.page-contact .contact-card__v {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: clamp(0.98rem, 4.1vw, 1.4rem);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text-strong);
  overflow-wrap: anywhere;
}

.page-contact .contact-card__v--tel {
  color: var(--lime);
  letter-spacing: 0.02em;
}

.page-contact .contact-card__hint {
  margin: 10px 0 0;
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--text-dim);
}

.page-contact .contact-card__foot {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
}

/* ---------- 章节通用 ---------- */
.page-contact .section-note {
  margin: 14px 0 0;
  max-width: 40em;
  font-size: 0.96rem;
  line-height: 1.75;
  color: var(--text-dim);
}

/* ---------- 01 准备清单 ---------- */
.page-contact .chip-row {
  margin: 26px 0 22px;
}

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

.page-contact .prep-item {
  position: relative;
  min-width: 0;
  padding: 20px 18px 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--ink-800);
  transition: border-color 0.22s var(--ease);
}

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

.page-contact .prep-item[hidden] {
  display: none;
}

.page-contact .prep-item__head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.page-contact .prep-item__num {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  color: var(--blue-soft);
}

.page-contact .prep-item__title {
  margin: 0 0 14px;
  font-size: 1.02rem;
  line-height: 1.5;
  color: var(--text-strong);
}

.page-contact .field-list {
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .field-list li {
  display: grid;
  grid-template-columns: 5.4em minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text);
}

.page-contact .field-list b {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--text-dim);
}

/* ---------- 02 纠错 ---------- */
.page-contact .correct-grid {
  display: grid;
  gap: 30px;
  margin-top: 26px;
}

.page-contact .example-toggle {
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: var(--ink-800);
  overflow: hidden;
}

.page-contact .example-toggle > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 15px 18px;
  font-size: 0.96rem;
  font-weight: 600;
  color: var(--text-strong);
  cursor: pointer;
  list-style: none;
}

.page-contact .example-toggle > summary::-webkit-details-marker {
  display: none;
}

.page-contact .example-toggle > summary::after {
  content: "展开";
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--blue-soft);
}

.page-contact .example-toggle[open] > summary::after {
  content: "收起";
}

.page-contact .example-toggle[open] > summary {
  border-bottom: 1px solid var(--line);
}

.page-contact .example-toggle__body {
  padding: 18px;
}

.page-contact .formula {
  margin: 0;
  padding: 16px;
  border: 1px dashed var(--line-strong);
  border-left: 3px solid var(--amber);
  border-radius: 10px;
  background: var(--ink-900);
  font-family: var(--font-mono);
  font-size: 0.84rem;
  line-height: 1.95;
  color: var(--text);
  white-space: pre-wrap;
  overflow-x: auto;
}

.page-contact .correct-note {
  margin: 18px 0 0;
  max-width: 38em;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-contact .flow {
  display: grid;
  gap: 18px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
}

.page-contact .flow__step {
  position: relative;
  padding-top: 16px;
  border-top: 1px solid var(--line-strong);
}

.page-contact .flow__step::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 34px;
  height: 2px;
  background: var(--blue);
}

.page-contact .flow__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-contact .flow__title {
  margin: 8px 0 6px;
  font-size: 0.98rem;
  color: var(--text-strong);
}

.page-contact .flow__step p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--text-dim);
}

/* ---------- 03 合作 ---------- */
.page-contact .coop-grid {
  display: grid;
  gap: 16px;
  margin-top: 26px;
}

.page-contact .coop-item {
  min-width: 0;
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-top: 2px solid var(--blue);
  border-radius: 0 0 12px 12px;
  background: linear-gradient(180deg, rgba(46, 125, 255, 0.10), transparent 60%), var(--ink-800);
}

.page-contact .coop-item__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-contact .coop-item__title {
  margin: 12px 0 10px;
  font-size: 1.06rem;
  line-height: 1.45;
  color: var(--text-strong);
}

.page-contact .coop-item p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.72;
  color: var(--text);
}

.page-contact .coop-item__ask {
  margin-top: 12px !important;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 0.86rem !important;
  color: var(--text-dim) !important;
}

.page-contact .coop-foot {
  margin: 22px 0 0;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--text-dim);
}

/* ---------- 04 地址 ---------- */
.page-contact .reach-grid {
  display: grid;
  gap: 26px;
  margin-top: 26px;
}

.page-contact .reach-list {
  display: grid;
  gap: 0;
  margin: 0;
}

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

.page-contact .reach-row:first-child {
  border-top: 1px solid var(--line);
}

.page-contact .reach-row dt {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-contact .reach-row dd {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.68;
  color: var(--text-strong);
}

.page-contact .reach-mono {
  font-family: var(--font-mono);
  letter-spacing: 0.01em;
  overflow-wrap: anywhere;
  color: var(--lime);
}

.page-contact .reach-note {
  margin: 20px 0 0;
  max-width: 36em;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--text-dim);
}

/* ---------- 次级入口 ---------- */
.page-contact .next-links {
  border-top: 1px solid var(--line);
  padding-top: 26px;
}

.page-contact .next-links__label {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.page-contact .next-links__row {
  display: grid;
  gap: 10px;
}

.page-contact .next-link {
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  text-decoration: none;
  background: var(--glass-soft);
  transition: border-color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-contact .next-link:hover,
.page-contact .next-link:focus-visible {
  border-color: var(--blue);
  background: rgba(46, 125, 255, 0.10);
}

.page-contact .next-link__k {
  font-size: 0.96rem;
  font-weight: 600;
  color: var(--text-strong);
}

.page-contact .next-link__d {
  font-size: 0.84rem;
  line-height: 1.6;
  color: var(--text-dim);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-contact .prep-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 860px) {
  .page-contact .flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 26px;
  }

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

@media (min-width: 960px) {
  .page-contact .contact-hero__inner {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
    align-items: start;
    gap: clamp(30px, 5vw, 64px);
  }

  .page-contact .correct-grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    align-items: start;
    gap: clamp(30px, 5vw, 56px);
  }

  .page-contact .reach-grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: center;
    gap: clamp(30px, 5vw, 56px);
  }

  .page-contact .reach-row {
    grid-template-columns: 7.4em minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }

  .page-contact .next-links__row {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (min-width: 1180px) {
  .page-contact .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .anchor-link,
  .page-contact .prep-item,
  .page-contact .next-link {
    transition: none;
  }
}