.page-contact {
  background: var(--c-deep);
  color: var(--c-white);
  font-family: var(--font-sans);
  overflow-x: clip;
}

.page-contact .section-title {
  margin: 0 0 18px;
  font-size: clamp(1.45rem, 3.2vw, 2.3rem);
  font-weight: 400;
  letter-spacing: 0.06em;
  line-height: 1.22;
  color: var(--c-white);
}

.page-contact .prose {
  color: var(--c-grey);
  font-size: 0.97rem;
  line-height: 1.85;
  max-width: 38em;
  margin: 0 0 14px;
}

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

.page-contact .prose a {
  color: var(--c-violet-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--c-orbit);
  transition: border-color var(--t-draw) ease, color var(--t-fast) ease;
}

.page-contact .prose a:hover {
  border-color: var(--c-violet-soft);
  color: var(--c-white);
}

.page-contact .idx {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-violet-soft);
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  padding-top: clamp(40px, 6vw, 76px);
}

.page-contact .contact-hero__inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--edge);
}

.page-contact .contact-hero__title {
  margin: 26px 0 0;
  font-size: clamp(2.05rem, 6vw, 4.2rem);
  font-weight: 300;
  letter-spacing: 0.05em;
  line-height: 1.12;
  color: var(--c-white);
  max-width: 20em;
}

.page-contact .contact-hero__lower {
  display: grid;
  gap: clamp(24px, 4vw, 52px);
  grid-template-columns: 1fr;
  margin-top: clamp(28px, 4.5vw, 52px);
}

.page-contact .contact-hero__meta {
  margin: 20px 0 0;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-grey);
  word-break: break-word;
}

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

/* ---------- 通道 ---------- */

.page-contact .channel-band {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--edge) var(--band);
}

.page-contact .channels {
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--c-orbit);
}

.page-contact .channel {
  padding: clamp(22px, 3vw, 32px) clamp(4px, 1.5vw, 20px);
  border-bottom: 1px solid var(--c-orbit);
  transition: background var(--t-fast) ease, box-shadow var(--t-fast) ease;
}

.page-contact .channel:hover {
  background: rgba(21, 27, 48, 0.6);
  box-shadow: inset 3px 0 0 var(--c-violet);
}

.page-contact .channel__tag {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-grey);
}

.page-contact .channel__name {
  margin: 0 0 10px;
  font-size: 1.02rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--c-white);
}

.page-contact .channel__value {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  letter-spacing: 0.03em;
  line-height: 1.6;
  color: var(--c-violet-soft);
  word-break: break-word;
}

.page-contact .channel__desc {
  margin: 0 0 18px;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--c-grey);
}

.page-contact .channel__copy {
  margin-top: 2px;
}

.page-contact .channel__copy[data-copied] {
  border-color: var(--c-aurora);
  color: var(--c-aurora);
}

/* ---------- 双栏骨架 ---------- */

.page-contact .split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--edge);
}

.page-contact .split__aside .prose {
  max-width: 30em;
}

/* ---------- 自查清单 ---------- */

.page-contact .selfcheck {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--c-orbit);
}

.page-contact .selfcheck__item {
  border-bottom: 1px solid var(--c-orbit);
}

.page-contact .selfcheck__label {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: 20px 4px;
  cursor: pointer;
  align-items: start;
  transition: background var(--t-fast) ease;
}

.page-contact .selfcheck__label:hover {
  background: rgba(21, 27, 48, 0.5);
}

.page-contact .selfcheck__box {
  appearance: none;
  -webkit-appearance: none;
  flex: none;
  width: 18px;
  height: 18px;
  margin: 4px 0 0;
  border: 1px solid var(--c-orbit);
  background: var(--c-deep-2);
  position: relative;
  cursor: pointer;
  transition: border-color var(--t-fast) ease, background var(--t-fast) ease;
}

.page-contact .selfcheck__box:checked {
  background: var(--c-violet);
  border-color: var(--c-violet);
}

.page-contact .selfcheck__box:checked::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 5px;
  height: 10px;
  border-right: 2px solid var(--c-white);
  border-bottom: 2px solid var(--c-white);
  transform: rotate(42deg);
}

.page-contact .selfcheck__box:focus-visible {
  outline: 2px solid var(--c-violet-soft);
  outline-offset: 2px;
}

.page-contact .selfcheck__body {
  display: grid;
  gap: 6px;
  min-width: 0;
}

.page-contact .selfcheck__name {
  display: block;
  font-size: 1rem;
  letter-spacing: 0.04em;
  color: var(--c-white);
}

.page-contact .selfcheck__num {
  margin-right: 12px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-grey);
}

.page-contact .selfcheck__hint {
  display: block;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--c-grey);
}

/* ---------- 反馈分类 ---------- */

.page-contact .cat-head {
  max-width: var(--shell);
  margin: 0 auto clamp(20px, 3vw, 32px);
  padding: 0 var(--edge);
}

.page-contact .cat-figure {
  max-width: var(--shell);
  margin: 0 auto clamp(28px, 4vw, 44px);
  width: calc(100% - var(--edge) * 2);
}

.page-contact .fb-list {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--edge);
  border-top: 1px solid var(--c-orbit);
}

.page-contact .fb-item {
  border-bottom: 1px solid var(--c-orbit);
}

.page-contact .fb-item__summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 14px;
  align-items: baseline;
  padding: 20px 4px;
  cursor: pointer;
  list-style: none;
  transition: background var(--t-fast) ease;
}

.page-contact .fb-item__summary::-webkit-details-marker {
  display: none;
}

.page-contact .fb-item__summary::marker {
  content: "";
}

.page-contact .fb-item__summary:hover {
  background: rgba(21, 27, 48, 0.5);
}

.page-contact .fb-item__num {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-grey);
  transition: color var(--t-fast) ease;
}

.page-contact .fb-item[open] .fb-item__num {
  color: var(--c-violet);
}

.page-contact .fb-item__name {
  font-size: 1rem;
  letter-spacing: 0.05em;
  color: var(--c-white);
}

.page-contact .fb-item__pace {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--c-grey);
  white-space: nowrap;
}

.page-contact .fb-item__body {
  padding: 0 4px 24px;
}

/* ---------- 导出专用通道 ---------- */

.page-contact .export-path {
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(24px, 4vw, 48px);
  border: 1px solid var(--c-orbit);
  background:
    linear-gradient(148deg, rgba(108, 77, 255, 0.13), rgba(5, 7, 15, 0) 58%),
    var(--c-deep-2);
}

.page-contact .field-list {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--c-orbit);
}

.page-contact .field-list__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid var(--c-orbit);
}

.page-contact .field-list__key {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-violet-soft);
}

.page-contact .field-list__val {
  font-size: 0.93rem;
  line-height: 1.78;
  color: var(--c-grey);
}

.page-contact .export-path__foot {
  margin: 26px 0 0;
}

/* ---------- 公示信息 ---------- */

.page-contact .public-info {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--edge) var(--band);
}

.page-contact .public-info__inner {
  max-width: 660px;
  border-top: 1px solid var(--c-orbit);
  padding-top: 26px;
}

.page-contact .public-info__title {
  margin: 0 0 18px;
  font-size: 0.95rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--c-grey);
}

.page-contact .public-info__list {
  margin: 0;
  display: grid;
  gap: 10px;
}

.page-contact .public-info__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
}

.page-contact .public-info__key {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--c-grey);
  opacity: 0.75;
}

.page-contact .public-info__val {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--c-grey);
  word-break: break-word;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-contact .field-list__item {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 26px;
    align-items: baseline;
  }

  .page-contact .public-info__row {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero__lower {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-contact .split {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    align-items: start;
  }

  .page-contact .channels {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    border-bottom: 1px solid var(--c-orbit);
  }

  .page-contact .channel {
    border-bottom: 0;
    border-right: 1px solid var(--c-orbit);
    padding: clamp(24px, 3vw, 34px) clamp(16px, 2.4vw, 28px);
  }

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

@media (min-width: 1280px) {
  .page-contact .contact-hero__title {
    letter-spacing: 0.07em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel,
  .page-contact .selfcheck__label,
  .page-contact .selfcheck__box,
  .page-contact .fb-item__summary,
  .page-contact .fb-item__num,
  .page-contact .prose a {
    transition: none;
  }
}
</main>