.page-contact {
  --paper-accent: #B4430E;
  --contact-shadow: 8px 8px 0 rgba(0, 0, 0, 0.5);
  --contact-shadow-lift: 8px 13px 0 rgba(0, 0, 0, 0.55);
  background: var(--ink);
  color: var(--snow);
}

.page-contact h2 {
  font-size: clamp(1.5rem, 4vw, 2.45rem);
  line-height: 1.12;
  letter-spacing: -0.015em;
  font-weight: 900;
  margin: 0.45rem 0 0;
}

.page-contact a:focus-visible,
.page-contact .checklist__box:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  background:
    radial-gradient(115% 85% at 90% 0%, rgba(0, 209, 193, 0.17), transparent 62%),
    linear-gradient(200deg, rgba(11, 110, 138, 0.28), transparent 70%),
    var(--ink-2);
  border-bottom: 1px solid var(--line);
  padding-block: clamp(1.1rem, 3vw, 1.75rem) clamp(2.5rem, 6vw, 4rem);
}

.page-contact .contact-hero__body {
  margin-top: clamp(1.25rem, 4vw, 2.5rem);
}

.page-contact .contact-hero__title {
  font-size: clamp(2.05rem, 6.4vw, 4rem);
  line-height: 1.02;
  letter-spacing: -0.025em;
  font-weight: 900;
  margin: 0.5rem 0 0;
  max-width: 20ch;
}

.page-contact .contact-hero__lead {
  margin: 1.1rem 0 0;
  max-width: 46ch;
  font-size: var(--step-4);
  line-height: 1.75;
  color: rgba(244, 249, 255, 0.82);
}

.page-contact .hero-chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.5rem 0 0;
  padding: 0;
}

.page-contact .hero-chip {
  font-size: var(--step-2);
  letter-spacing: 0.08em;
  padding: 0.38rem 0.85rem;
  border: 1px solid var(--line);
  border-left: 4px solid var(--orange);
  color: var(--snow);
  background: rgba(11, 110, 138, 0.2);
}

/* ---------- 联系方式 ---------- */

.page-contact .contact-lines {
  background: var(--ink);
  border-bottom: 1px solid var(--line);
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
}

.page-contact .contact-lines__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 5vw, 3rem);
}

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

.page-contact .contact-lines__intro {
  margin: 1rem 0 0;
  max-width: 44ch;
  font-size: var(--step-4);
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .contact-stack {
  list-style: none;
  margin: 1.9rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.1rem;
}

.page-contact .contact-card {
  position: relative;
  padding: 1.15rem 1.2rem 1.25rem 1.4rem;
  border: 3px solid var(--line);
  background: linear-gradient(150deg, rgba(11, 110, 138, 0.3), rgba(7, 23, 34, 0.75));
  box-shadow: var(--contact-shadow);
  transition: border-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}

.page-contact .contact-card::before {
  content: "";
  position: absolute;
  left: -3px;
  top: 16px;
  width: 3px;
  height: 30px;
  background: var(--teal);
}

.page-contact .contact-card::after {
  content: "";
  position: absolute;
  left: -3px;
  top: 16px;
  width: 12px;
  height: 3px;
  background: var(--teal);
}

.page-contact .contact-card:hover,
.page-contact .contact-card:focus-within {
  border-color: var(--teal);
  transform: translateY(-4px);
  box-shadow: var(--contact-shadow-lift);
}

.page-contact .contact-card__tag {
  margin: 0;
  font-size: var(--step-1);
  letter-spacing: 0.24em;
  color: var(--teal);
}

.page-contact .contact-card__val {
  margin: 0.45rem 0 0;
  font-size: clamp(1.05rem, 2.6vw, 1.4rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--snow);
  overflow-wrap: anywhere;
}

.page-contact .contact-card__val--mail {
  font-family: var(--font-mono);
  font-size: clamp(0.92rem, 2.3vw, 1.15rem);
  letter-spacing: -0.01em;
}

.page-contact .contact-card__desc {
  margin: 0.6rem 0 0;
  font-size: var(--step-3);
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .contact-lines__map {
  margin: 0;
}

/* ---------- 回复时段 ---------- */

.page-contact .contact-hours {
  background: var(--ice);
  padding-block: clamp(2.5rem, 6vw, 4rem);
}

.page-contact .contact-hours__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 4vw, 3rem);
}

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

.page-contact .eyebrow--snow {
  color: rgba(244, 249, 255, 0.86);
}

.page-contact .contact-hours__lead {
  margin: 1rem 0 0;
  max-width: 42ch;
  font-size: var(--step-3);
  line-height: 1.75;
  color: rgba(244, 249, 255, 0.88);
}

.page-contact .hours-list {
  margin: 1.75rem 0 0;
  display: grid;
  gap: 0.85rem;
  border-top: 1px solid rgba(244, 249, 255, 0.32);
  padding-top: 1.15rem;
}

.page-contact .hours-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.15rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px dashed rgba(244, 249, 255, 0.3);
}

.page-contact .hours-item dt {
  font-size: var(--step-3);
  font-weight: 700;
  color: var(--snow);
}

.page-contact .hours-item dd {
  margin: 0;
  font-size: var(--step-3);
  line-height: 1.6;
  color: rgba(244, 249, 255, 0.86);
}

.page-contact .contact-hours__figure {
  margin: 0;
}

/* ---------- 纸面区块 ---------- */

.page-contact .contact-paper {
  background: var(--paper);
  color: var(--ink-paper);
  padding-block: clamp(2.5rem, 6vw, 4.25rem);
}

.page-contact .paper-block + .paper-block {
  margin-top: clamp(2.5rem, 6vw, 4rem);
  padding-top: clamp(2.5rem, 6vw, 4rem);
  border-top: 2px solid rgba(10, 16, 22, 0.16);
}

.page-contact .paper-block__head h2 {
  color: var(--ink-paper);
  max-width: 27ch;
}

.page-contact .eyebrow--paper {
  color: var(--paper-accent);
}

.page-contact .paper-block__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  margin-top: clamp(1.25rem, 3vw, 2rem);
}

.page-contact .contact-paper .prose {
  color: var(--ink-paper);
}

.page-contact .paper-block__prose p {
  font-size: var(--step-3);
  line-height: 1.8;
}

.page-contact .paper-block__prose p + p {
  margin-top: 0.9rem;
}

.page-contact .coop-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.page-contact .coop-list__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.9rem;
  align-items: start;
  padding: 0.8rem 0.95rem;
  background: rgba(11, 110, 138, 0.09);
  border-left: 4px solid var(--ice);
}

.page-contact .coop-list__idx {
  font-size: var(--step-2);
  letter-spacing: 0.1em;
  color: var(--paper-accent);
  padding-top: 0.1rem;
}

.page-contact .coop-list__text {
  font-size: var(--step-3);
  line-height: 1.65;
  color: var(--ink-paper);
}

.page-contact .correct-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-contact .correct-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.9rem;
  align-items: baseline;
  padding: 0.8rem 0;
  border-bottom: 1px solid rgba(10, 16, 22, 0.16);
}

.page-contact .correct-step:first-child {
  border-top: 1px solid rgba(10, 16, 22, 0.16);
}

.page-contact .correct-step__num {
  font-size: var(--step-2);
  letter-spacing: 0.1em;
  color: var(--paper-accent);
}

.page-contact .correct-step__text {
  font-size: var(--step-3);
  line-height: 1.65;
  color: var(--ink-paper);
}

/* ---------- 提交前自查与内链 ---------- */

.page-contact .contact-wrap {
  background:
    linear-gradient(160deg, rgba(255, 106, 43, 0.08), transparent 55%),
    var(--ink-2);
  border-top: 1px solid var(--line);
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
}

.page-contact .contact-wrap__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 4vw, 2.5rem);
}

.page-contact .contact-wrap__lead {
  margin: 1rem 0 0;
  max-width: 40ch;
  font-size: var(--step-3);
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.page-contact .checklist__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.8rem;
  align-items: start;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--line);
  background: rgba(11, 110, 138, 0.15);
  cursor: pointer;
  transition: border-color 160ms ease, background-color 160ms ease;
}

.page-contact .checklist__item:hover {
  border-color: var(--teal);
  background: rgba(0, 209, 193, 0.1);
}

.page-contact .checklist__box {
  appearance: none;
  -webkit-appearance: none;
  position: relative;
  width: 1.05rem;
  height: 1.05rem;
  margin: 0.2rem 0 0;
  border: 2px solid var(--ice-light);
  background: transparent;
  cursor: pointer;
  flex: none;
}

.page-contact .checklist__box:checked {
  background: var(--teal);
  border-color: var(--teal);
}

.page-contact .checklist__box:checked::after {
  content: "";
  position: absolute;
  left: 0.27rem;
  top: 0.04rem;
  width: 0.28rem;
  height: 0.58rem;
  border-right: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  transform: rotate(42deg);
}

.page-contact .checklist__label {
  font-size: var(--step-3);
  line-height: 1.65;
  color: var(--snow);
}

.page-contact .contact-wrap__links {
  padding-top: clamp(1.25rem, 3vw, 2rem);
  border-top: 1px solid var(--line);
}

.page-contact .contact-wrap__links-title {
  margin: 0;
  font-size: var(--step-3);
  font-weight: 700;
  color: var(--snow);
}

.page-contact .link-list {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.page-contact .link-list a {
  color: var(--teal);
  text-decoration: none;
  font-size: var(--step-3);
  line-height: 1.6;
  border-bottom: 1px solid rgba(0, 209, 193, 0.42);
  padding-bottom: 0.12rem;
  transition: color 160ms ease, border-color 160ms ease;
}

.page-contact .link-list a:hover {
  color: var(--orange);
  border-color: var(--orange);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-contact .contact-card:nth-child(2) {
    margin-left: clamp(0.6rem, 3vw, 1.5rem);
  }

  .page-contact .contact-card:nth-child(3) {
    margin-left: clamp(1.2rem, 6vw, 3rem);
  }
}

@media (min-width: 768px) {
  .page-contact .hours-item {
    grid-template-columns: 10rem minmax(0, 1fr);
    gap: 1rem;
    align-items: baseline;
  }

  .page-contact .link-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.8rem 1.5rem;
  }
}

@media (min-width: 960px) {
  .page-contact .contact-lines__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: start;
  }

  .page-contact .contact-hours__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
    align-items: center;
  }

  .page-contact .paper-block__body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .contact-wrap__grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    align-items: start;
  }

  .page-contact .contact-wrap__links {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1200px) {
  .page-contact .contact-lines__map {
    margin-top: 3.2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-card,
  .page-contact .checklist__item,
  .page-contact .link-list a {
    transition: none;
  }

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