.page-contact {
  --contact-line: rgba(0, 229, 255, .16);
  --grid-size: 64px;
  background: var(--ink-900);
  color: var(--white-000);
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + 72px) 0 56px;
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(0, 229, 255, .10) 0%, transparent 58%),
    linear-gradient(180deg, var(--ink-900) 0%, var(--deep-800) 100%);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.page-contact .contact-hero__grid {
  position: relative;
  display: grid;
  gap: 40px;
  align-items: end;
}

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

.page-contact .contact-hero__title {
  margin-top: 22px;
  font-size: clamp(34px, 8.4vw, 60px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -.03em;
  color: var(--white-000);
}

.page-contact .contact-hero__text {
  margin-top: 20px;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--grey-400);
}

.page-contact .contact-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.page-contact .contact-hero__meta .tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  padding: 6px 12px;
  border: 1px solid var(--contact-line);
  color: var(--cyan-300);
}

.page-contact .hero-facts {
  margin-top: 36px;
  border-top: 1px solid var(--contact-line);
}

.page-contact .hero-facts__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(27, 58, 87, .8);
}

.page-contact .hero-facts__row dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--cyan-500);
}

.page-contact .hero-facts__row dd {
  font-size: 15px;
  color: var(--white-000);
}

.page-contact .contact-hero__media {
  margin: 0;
  border: 1px solid var(--line-600);
  background: var(--deep-800);
  clip-path: polygon(0 0, 100% 5%, 100% 100%, 0 95%);
}

.page-contact .contact-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  filter: saturate(.85) contrast(1.05);
}

/* ---------- 通用区块标题 ---------- */

.page-contact .sec-head {
  max-width: 62ch;
}

.page-contact .sec-head__index {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--cyan-500);
}

.page-contact .sec-head__title {
  margin-top: 12px;
  font-size: clamp(24px, 4.6vw, 36px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -.025em;
  color: var(--white-000);
}

.page-contact .sec-head__desc {
  margin-top: 16px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--grey-400);
}

/* ---------- 渠道带 ---------- */

.page-contact .contact-channels {
  padding: 72px 0 64px;
  background: var(--deep-800);
  border-top: 1px solid var(--line-600);
}

.page-contact .channels {
  display: grid;
  gap: 20px;
  margin-top: 44px;
}

.page-contact .channel {
  position: relative;
  min-width: 0;
  padding: 26px 22px 30px;
  border: 1px solid var(--line-600);
  border-top: 2px solid var(--cyan-500);
  background: linear-gradient(180deg, var(--surface-700) 0%, rgba(11, 30, 51, .92) 100%);
}

.page-contact .channel--mail {
  border-top-color: var(--orange-500);
}

.page-contact .channel--addr {
  border-top-color: var(--cyan-300);
}

.page-contact .channel__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--grey-400);
}

.page-contact .channel__value {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: clamp(22px, 6.2vw, 30px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: .01em;
  font-variant-numeric: tabular-nums;
  color: var(--orange-500);
  overflow-wrap: anywhere;
}

.page-contact .channel__value--text {
  font-family: var(--font-sans);
  font-size: clamp(18px, 5vw, 21px);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--white-000);
}

.page-contact .channel__desc {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--grey-400);
}

.page-contact .channel__list {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid rgba(27, 58, 87, .9);
  display: grid;
  gap: 9px;
}

.page-contact .channel__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--white-000);
}

.page-contact .channel__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 6px;
  height: 1px;
  background: var(--cyan-500);
}

/* ---------- 工作时间 ---------- */

.page-contact .contact-hours {
  padding: 72px 0;
  background: var(--ink-900);
  border-top: 1px solid var(--line-600);
}

.page-contact .hours-grid {
  display: grid;
  gap: 40px;
}

.page-contact .hours-panel {
  min-width: 0;
  padding: 28px 22px 32px;
  border: 1px solid var(--line-600);
  background:
    linear-gradient(var(--grid-line) 1px, transparent 1px) 0 0 / 100% 32px,
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px) 0 0 / 32px 100%,
    linear-gradient(180deg, rgba(16, 42, 68, .9), rgba(6, 18, 31, .9));
}

.page-contact .hours-panel__cap {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan-300);
}

.page-contact .hours-scale {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
}

.page-contact .hours-scale__edge {
  font-family: var(--font-mono);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  color: var(--white-000);
  flex: none;
}

.page-contact .hours-scale__track {
  position: relative;
  flex: 1 1 auto;
  min-width: 0;
  height: 42px;
  background-image: linear-gradient(90deg, var(--line-600) 1px, transparent 1px);
  background-size: 11.111% 100%;
  border-bottom: 1px solid var(--line-600);
}

.page-contact .hours-scale__fill {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 4px;
  background: linear-gradient(90deg, var(--cyan-500), var(--cyan-300));
}

.page-contact .hours-list {
  margin-top: 28px;
  display: grid;
  gap: 18px;
}

.page-contact .hours-list > div {
  padding-top: 14px;
  border-top: 1px solid rgba(27, 58, 87, .9);
}

.page-contact .hours-list dt {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--cyan-300);
}

.page-contact .hours-list dd {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--grey-400);
}

/* ---------- 提交流程 ---------- */

.page-contact .contact-flow {
  padding: 72px 0;
  background: var(--deep-800);
  border-top: 1px solid var(--line-600);
}

.page-contact .flow-figure {
  margin: 36px 0 0;
  border: 1px solid var(--line-600);
  background: var(--ink-900);
}

.page-contact .flow-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1200 / 620;
  object-fit: cover;
  opacity: .9;
}

.page-contact .flow {
  margin-top: 40px;
  border-top: 1px solid var(--line-600);
}

.page-contact .flow-step {
  border-bottom: 1px solid var(--line-600);
}

.page-contact .flow-step > summary {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 20px 2px;
  cursor: pointer;
  list-style: none;
}

.page-contact .flow-step > summary::-webkit-details-marker {
  display: none;
}

.page-contact .flow-step__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--cyan-500);
}

.page-contact .flow-step__title {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -.015em;
  color: var(--white-000);
}

.page-contact .flow-step__mark {
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
  align-self: center;
}

.page-contact .flow-step__mark::before,
.page-contact .flow-step__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--cyan-500);
  transition: opacity 220ms var(--ease);
}

.page-contact .flow-step__mark::before {
  width: 14px;
  height: 1px;
  transform: translate(-50%, -50%);
}

.page-contact .flow-step__mark::after {
  width: 1px;
  height: 14px;
  transform: translate(-50%, -50%);
}

.page-contact .flow-step[open] .flow-step__mark::after {
  opacity: 0;
}

.page-contact .flow-step__body {
  padding: 0 2px 26px;
}

.page-contact .flow-step__body p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--grey-400);
}

.page-contact .flow-step__list {
  margin-top: 14px;
  display: grid;
  gap: 8px;
}

.page-contact .flow-step__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--white-000);
}

.page-contact .flow-step__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 8px;
  height: 1px;
  background: var(--orange-500);
}

/* ---------- 边界说明 ---------- */

.page-contact .contact-boundary {
  padding: 72px 0;
  background: var(--ink-900);
  border-top: 1px solid var(--line-600);
}

.page-contact .boundary-grid {
  display: grid;
  gap: 20px;
  margin-top: 40px;
}

.page-contact .boundary-col {
  min-width: 0;
  padding: 24px 22px 28px;
  border: 1px solid var(--line-600);
}

.page-contact .boundary-col--yes {
  border-left: 2px solid var(--ok-500);
}

.page-contact .boundary-col--no {
  border-left: 2px solid var(--edge-500);
}

.page-contact .boundary-col__title {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--white-000);
}

.page-contact .boundary-col--no .boundary-col__title {
  color: var(--grey-400);
}

.page-contact .boundary-col ul {
  margin-top: 16px;
  display: grid;
  gap: 10px;
}

.page-contact .boundary-col li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--white-000);
}

.page-contact .boundary-col--no li {
  color: var(--grey-400);
}

.page-contact .boundary-col li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 6px;
  height: 1px;
  background: var(--cyan-500);
}

.page-contact .boundary-col--no li::before {
  background: var(--edge-500);
}

.page-contact .boundary-note {
  margin-top: 28px;
  padding-left: 16px;
  border-left: 1px solid var(--orange-500);
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--grey-400);
}

/* ---------- 备案与身份 ---------- */

.page-contact .contact-identity {
  padding: 64px 0 88px;
  background: var(--deep-800);
  border-top: 1px solid var(--line-600);
}

.page-contact .identity-bar {
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--contact-line);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 64px 64px;
}

.page-contact .identity-facts {
  display: grid;
  gap: 18px;
}

.page-contact .identity-facts > div {
  min-width: 0;
}

.page-contact .identity-facts dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan-500);
}

.page-contact .identity-facts dd {
  margin-top: 8px;
  font-size: 16px;
  color: var(--white-000);
  overflow-wrap: anywhere;
}

.page-contact .identity-facts dd.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .01em;
}

.page-contact .identity-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-contact .contact-hero {
    padding: calc(var(--header-h) + 96px) 0 72px;
  }

  .page-contact .hero-facts__row {
    grid-template-columns: 160px minmax(0, 1fr);
    align-items: baseline;
    gap: 20px;
  }

  .page-contact .hours-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .page-contact .boundary-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
  }

  .page-contact .identity-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px 40px;
  }
}

@media (min-width: 960px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 64px;
  }

  .page-contact .channels {
    grid-template-columns: minmax(0, 40fr) minmax(0, 34fr) minmax(0, 26fr);
    gap: 26px;
    align-items: start;
    padding-bottom: 118px;
  }

  .page-contact .channel--phone {
    transform: translateY(52px);
  }

  .page-contact .channel--addr {
    transform: translateY(104px);
  }

  .page-contact .channels .channel {
    transition: transform 240ms var(--ease);
  }

  .page-contact .hours-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: 56px;
    align-items: start;
  }

  .page-contact .hours-grid__head {
    position: sticky;
    top: calc(var(--header-h) + 32px);
  }

  .page-contact .flow-figure {
    margin-top: 44px;
  }

  .page-contact .flow-step > summary {
    padding: 24px 2px;
  }

  .page-contact .flow-step__title {
    font-size: 20px;
  }

  .page-contact .flow-step__body {
    padding-left: 46px;
    padding-right: 96px;
  }

  .page-contact .identity-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .identity-links {
    margin-top: 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel,
  .page-contact .flow-step__mark::before,
  .page-contact .flow-step__mark::after {
    transition: none;
  }
}