.page-contact {
  --pc-gap: 24px;
  background: var(--paper);
}

/* ---------- 首屏框景 ---------- */
.page-contact .contact-hero {
  padding-block: 22px 40px;
  background: var(--paper);
}

.page-contact .breadcrumbs {
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: #5A6469;
}

.page-contact .breadcrumbs a {
  color: var(--grass);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .2s var(--ease);
}

.page-contact .breadcrumbs a:hover,
.page-contact .breadcrumbs a:focus-visible {
  border-bottom-color: var(--grass);
}

.page-contact .breadcrumbs span[aria-hidden] {
  margin: 0 6px;
  color: var(--line-strong);
}

.page-contact .hero-frame {
  position: relative;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: #FFFFFF;
  padding: 30px 18px 22px;
  overflow: hidden;
}

.page-contact .hero-frame::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 6px;
  background-image: repeating-linear-gradient(90deg, var(--line-strong) 0 1px, transparent 1px 22px);
  pointer-events: none;
}

.page-contact .hero-frame::after {
  content: "";
  position: absolute;
  top: 16px;
  right: 16px;
  width: 9px;
  height: 9px;
  border-radius: 1px;
  background: var(--lime);
  box-shadow: 0 0 0 3px rgba(215, 242, 74, .22);
}

.page-contact .hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-contact .hero-copy h1 {
  margin: 12px 0 0;
  font-size: clamp(30px, 7.4vw, 54px);
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: 1.12;
  color: var(--paper-ink);
}

.page-contact .hero-lede {
  margin: 16px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.75;
  color: #333B42;
}

.page-contact .hero-stats {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(128px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-contact .hero-stats li {
  background: var(--paper);
  padding: 13px 14px 14px;
}

.page-contact .hero-stats .stat__value {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 23px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -.01em;
  color: var(--grass);
}

.page-contact .hero-stats .stat__unit {
  margin-left: 3px;
  font-size: 12px;
  font-weight: 500;
  color: var(--paper-ink);
}

.page-contact .hero-stats .stat__label {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  line-height: 1.55;
  color: #5A6469;
}

.page-contact .hero-media {
  margin: 0;
  border-color: var(--line);
}

/* ---------- 渠道面板 ---------- */
.page-contact .contact-channels {
  background: var(--paper);
  padding-block: 20px 48px;
}

.page-contact .channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-contact .channel-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px 18px 18px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  transition: border-color .22s var(--ease), transform .22s var(--ease), box-shadow .22s var(--ease);
}

.page-contact .channel-card::after {
  content: "";
  position: absolute;
  top: 14px;
  right: 14px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--line-strong);
  transition: background .22s var(--ease);
}

.page-contact .channel-card:hover,
.page-contact .channel-card:focus-within {
  border-color: var(--grass);
  transform: translateY(-4px);
  box-shadow: var(--shadow-2);
}

.page-contact .channel-card:hover::after,
.page-contact .channel-card:focus-within::after {
  background: var(--grass);
}

.page-contact .channel-card__index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--grass);
}

.page-contact .channel-card__icon {
  width: 22px;
  height: 22px;
  color: var(--grass);
  flex: none;
}

.page-contact .channel-card__value {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(15px, 4vw, 19px);
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: -.01em;
  color: var(--paper-ink);
  overflow-wrap: anywhere;
}

.page-contact .channel-card__use {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: #4B555B;
}

.page-contact .channel-card .fold {
  margin-top: auto;
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.page-contact .channel-card .fold summary {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--sky);
  cursor: pointer;
}

.page-contact .channel-card .fold__body {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: #4B555B;
}

/* ---------- 时段与要点 ---------- */
.page-contact .contact-window {
  padding-block: 52px;
}

.page-contact .contact-window .section-title {
  color: var(--ink-inverse);
  font-size: clamp(22px, 4.6vw, 30px);
  line-height: 1.32;
  letter-spacing: -.01em;
  margin: 12px 0 0;
}

.page-contact .window-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-contact .window-lede {
  margin: 14px 0 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-inverse-dim);
}

.page-contact .time-ruler {
  margin-top: 24px;
  padding: 16px 16px 14px;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .04);
}

.page-contact .time-ruler__track {
  height: 8px;
  border-radius: 2px;
  background: rgba(155, 163, 168, .22);
  overflow: hidden;
}

.page-contact .time-ruler__fill {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--grass) 0%, var(--sky) 64%, var(--lime) 100%);
}

.page-contact .time-ruler__scale {
  display: flex;
  justify-content: space-between;
  margin-top: 9px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--silver);
}

.page-contact .time-ruler__caption {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-contact .window-subtitle {
  margin: 0 0 4px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink-inverse);
}

.page-contact .need-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-contact .need-list li {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 13px 0;
  border-bottom: 1px solid var(--line-dark);
}

.page-contact .need-list li:first-child {
  border-top: 1px solid var(--line-dark);
}

.page-contact .need-list__num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.75;
  color: var(--lime);
}

.page-contact .need-list__text {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-inverse-dim);
}

.page-contact .need-list__text strong {
  color: var(--ink-inverse);
  font-weight: 700;
}

.page-contact .window-foot {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-inverse-dim);
}

.page-contact .link-inline {
  color: var(--sky);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 127, 214, .45);
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.page-contact .link-inline:hover,
.page-contact .link-inline:focus-visible {
  color: var(--grass);
  border-bottom-color: var(--grass);
}

.page-contact .section--dark .link-inline {
  color: var(--lime);
  border-bottom-color: rgba(215, 242, 74, .45);
}

.page-contact .section--dark .link-inline:hover,
.page-contact .section--dark .link-inline:focus-visible {
  color: #FFFFFF;
  border-bottom-color: #FFFFFF;
}

/* ---------- 提交清单 ---------- */
.page-contact .contact-submit {
  background: var(--paper);
  padding-block: 52px;
}

.page-contact .submit-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-contact .aside-title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--paper-ink);
}

.page-contact .flow-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
  counter-reset: flow;
}

.page-contact .flow-list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  font-size: 14px;
  line-height: 1.75;
  color: #4B555B;
}

.page-contact .flow-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.8;
  color: var(--grass);
  border-right: 1px solid var(--line);
  padding-right: 8px;
}

.page-contact .aside-foot {
  margin: 22px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.7;
  color: #4B555B;
}

.page-contact .form-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #FFFFFF;
  padding: 22px 18px 20px;
  box-shadow: var(--shadow-2);
}

.page-contact .form-grid {
  display: grid;
  grid-template-columns: 1fr;
}

.page-contact .form-field {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  grid-template-areas:
    "idx label"
    "idx hint";
  align-items: baseline;
  gap: 2px 10px;
  padding: 14px 0 12px;
  border-bottom: 1px solid var(--line);
  transition: border-color .2s var(--ease);
}

.page-contact .form-field:first-child {
  padding-top: 4px;
}

.page-contact .form-field:hover,
.page-contact .form-field:focus-within {
  border-bottom-color: var(--grass);
}

.page-contact .form-field__index {
  grid-area: idx;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  font-weight: 700;
  color: var(--sky);
}

.page-contact .form-field__label {
  grid-area: label;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper-ink);
}

.page-contact .form-field__hint {
  grid-area: hint;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: #79838A;
  overflow-wrap: anywhere;
}

.page-contact .form-note {
  margin: 18px 0 0;
  padding: 14px 16px;
  border-left: 3px solid var(--grass);
  background: var(--mint);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 14px;
  line-height: 1.75;
  color: #2C363C;
}

.page-contact .form-note .mono {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--grass-deep);
  overflow-wrap: anywhere;
}

/* ---------- 合作与引用 ---------- */
.page-contact .contact-coop {
  padding-block: 52px;
}

.page-contact .coop-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-contact .coop-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px 20px;
  background: rgba(255, 255, 255, .72);
  border: 1px solid rgba(14, 124, 74, .18);
  border-radius: var(--radius);
  transition: border-color .22s var(--ease), transform .22s var(--ease);
}

.page-contact .coop-card:hover {
  border-color: var(--grass);
  transform: translateY(-4px);
}

.page-contact .coop-card__tag {
  align-self: flex-start;
}

.page-contact .coop-card__title {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper-ink);
}

.page-contact .coop-card__body {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: #4B555B;
}

/* ---------- 来信信息条 ---------- */
.page-contact .contact-mailbar {
  padding-block: 52px 56px;
}

.page-contact .mailbar {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: center;
}

.page-contact .mailbar__map {
  margin: 0;
  border-color: var(--line-dark);
  opacity: .92;
}

.page-contact .mailbar__title {
  margin: 12px 0 0;
  font-size: clamp(21px, 4.4vw, 28px);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -.01em;
  color: var(--ink-inverse);
}

.page-contact .mailbar__list {
  margin: 18px 0 0;
  padding: 0;
  display: grid;
}

.page-contact .mailbar__list > div {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 14px;
  padding: 12px 0;
  border-top: 1px solid var(--line-dark);
}

.page-contact .mailbar__list dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--silver);
  padding-top: 3px;
}

.page-contact .mailbar__list dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink-inverse);
  overflow-wrap: anywhere;
}

.page-contact .mailbar__list dd.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
  letter-spacing: .01em;
}

.page-contact .mailbar__note {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-inverse-dim);
}

.page-contact .mailbar__links {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-inverse-dim);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .form-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 28px;
  }

  .page-contact .form-field--wide {
    grid-column: 1 / -1;
  }

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

@media (min-width: 900px) {
  .page-contact .contact-hero {
    padding-block: 30px 56px;
  }

  .page-contact .hero-frame {
    padding: 36px 34px 30px;
  }

  .page-contact .hero-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: end;
    gap: 44px;
  }

  .page-contact .channel-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    align-items: start;
    gap: 20px;
  }

  .page-contact .channel-card--mail {
    grid-column: span 5;
  }

  .page-contact .channel-card--phone {
    grid-column: span 3;
    margin-top: 42px;
  }

  .page-contact .channel-card--post {
    grid-column: span 4;
    margin-top: 84px;
  }

  .page-contact .window-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 48px;
    align-items: start;
  }

  .page-contact .submit-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 44px;
    align-items: start;
  }

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

  .page-contact .mailbar {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 48px;
  }
}

@media (min-width: 1100px) {
  .page-contact .contact-window,
  .page-contact .contact-submit,
  .page-contact .contact-coop {
    padding-block: 68px;
  }

  .page-contact .contact-mailbar {
    padding-block: 64px 72px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .coop-card,
  .page-contact .form-field {
    transition: none;
  }

  .page-contact .channel-card:hover,
  .page-contact .coop-card:hover {
    transform: none;
  }
}