.page-contact {
  position: relative;
  color: var(--text);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

/* ============ 首屏 ============ */
.page-contact .contact-hero {
  position: relative;
  padding: clamp(1.75rem, 4vw, 3rem) 0 clamp(3rem, 7vw, 5.5rem);
  overflow: hidden;
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(42, 37, 54, 0.42) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(42, 37, 54, 0.42) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 34% 24%, #000 0%, transparent 78%);
  mask-image: radial-gradient(ellipse 80% 70% at 34% 24%, #000 0%, transparent 78%);
  pointer-events: none;
  opacity: 0.85;
}

.page-contact .contact-hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: center;
}

.page-contact .contact-hero__eyebrow {
  margin: 0 0 1.1rem;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--neon);
}

.page-contact .contact-hero__title {
  margin: 0 0 1.25rem;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(2.125rem, 6.2vw, 3.75rem);
  line-height: 1.16;
  letter-spacing: 0.01em;
  color: var(--gold-bright);
  text-shadow: 0 0 42px rgba(214, 169, 74, 0.22);
}

.page-contact .contact-hero__lead {
  margin: 0 0 1.75rem;
  max-width: 34rem;
  font-size: clamp(0.95rem, 1.35vw, 1.0625rem);
  line-height: 1.8;
  color: var(--text);
}

.page-contact .contact-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: clamp(1.75rem, 3.5vw, 2.5rem);
}

.page-contact .contact-hero__facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(0.75rem, 2vw, 1.5rem);
  margin: 0;
  padding: 1.25rem 0 0;
  list-style: none;
  border-top: 1px solid var(--steel);
}

.page-contact .contact-hero__fact {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 0;
}

.page-contact .contact-hero__fact-num {
  font-family: var(--font-mono);
  font-size: clamp(1.25rem, 2.6vw, 1.75rem);
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.page-contact .contact-hero__fact-num small {
  font-size: 0.62em;
  font-weight: 400;
  color: var(--text-dim);
  margin-left: 0.18em;
}

.page-contact .contact-hero__fact-label {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  line-height: 1.5;
}

.page-contact .contact-hero__visual {
  position: relative;
  border: 1px solid var(--steel);
  background: linear-gradient(160deg, var(--layer) 0%, var(--layer-2) 100%);
  padding: 10px;
  box-shadow: var(--shadow-stack);
}

.page-contact .contact-hero__visual::after {
  content: "";
  position: absolute;
  left: -1px;
  top: -1px;
  width: 26px;
  height: 26px;
  border-top: 2px solid var(--gold);
  border-left: 2px solid var(--gold);
  pointer-events: none;
}

.page-contact .contact-hero__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.9) contrast(1.05);
}

.page-contact .contact-hero__coord {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--neon);
  background: rgba(7, 6, 10, 0.82);
  padding: 3px 8px;
  border: 1px solid var(--steel);
}

.page-contact .contact-hero__coord--a {
  right: 22px;
  top: 22px;
}

.page-contact .contact-hero__coord--b {
  left: 22px;
  bottom: 22px;
  color: var(--gold);
}

/* ============ 区块与标题 ============ */
.page-contact .section {
  position: relative;
  padding: clamp(2.5rem, 6vw, 4.5rem) 0;
}

.page-contact .section--channels {
  border-top: 1px solid var(--steel);
}

.page-contact .section-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(0.75rem, 2vw, 1.5rem);
  align-items: start;
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

.page-contact .section-head--tight {
  margin-bottom: clamp(1.25rem, 2.5vw, 1.75rem);
}

.page-contact .section-head__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--gold);
  padding-top: 0.6rem;
  border-top: 2px solid var(--gold);
}

.page-contact .section-head__body {
  min-width: 0;
}

.page-contact .section-head__title {
  margin: 0 0 0.55rem;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.6vw, 2.25rem);
  line-height: 1.28;
  color: var(--gold-bright);
}

.page-contact .section-head__note {
  margin: 0;
  max-width: 40rem;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--text-dim);
}

/* ============ 通道卡与面板 ============ */
.page-contact .channels {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.25rem, 3vw, 2.25rem);
}

.page-contact .channels__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.85rem;
}

.page-contact .channel-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-rows: auto auto;
  gap: 0.35rem 0.9rem;
  width: 100%;
  padding: 1rem 1.1rem;
  text-align: left;
  cursor: pointer;
  font: inherit;
  color: var(--text);
  background: linear-gradient(135deg, var(--layer) 0%, var(--layer-2) 100%);
  border: 1px solid var(--steel);
  border-left: 3px solid var(--steel);
  transition: transform 220ms ease, border-color 220ms ease, background-color 220ms ease;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}

.page-contact .channel-card:hover {
  border-color: rgba(214, 169, 74, 0.55);
  border-left-color: var(--gold);
  transform: translateY(-3px);
}

.page-contact .channel-card:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
}

.page-contact .channel-card[aria-selected="true"] {
  border-color: var(--gold);
  border-left-color: var(--neon);
  background: linear-gradient(135deg, rgba(107, 63, 212, 0.22) 0%, var(--layer-2) 78%);
  transform: translateY(-3px);
}

.page-contact .channel-card__num {
  grid-row: span 2;
  align-self: center;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 0.04em;
}

.page-contact .channel-card__label {
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.page-contact .channel-card__value {
  font-family: var(--font-mono);
  font-size: clamp(0.8125rem, 1.7vw, 0.9375rem);
  line-height: 1.6;
  color: var(--neon);
  word-break: break-word;
}

.page-contact .channels__panels {
  display: grid;
  gap: 1rem;
}

.page-contact .channels__panel {
  padding: 1.35rem 1.35rem 1.5rem;
  background: var(--layer-2);
  border: 1px solid var(--steel);
  border-top: 2px solid var(--royal);
  position: relative;
}

.page-contact .channels__panel::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 44px;
  height: 44px;
  border-right: 1px solid var(--steel);
  border-bottom: 1px solid var(--steel);
  pointer-events: none;
}

.page-contact .channels__panel-title {
  margin: 0 0 0.7rem;
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 0.02em;
}

.page-contact .channels__panel-text {
  margin: 0 0 1rem;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--text);
}

.page-contact .channels__bullets {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.55rem;
  border-top: 1px dashed var(--steel);
  padding-top: 0.9rem;
}

.page-contact .channels__bullets li {
  position: relative;
  padding-left: 1.15rem;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-contact .channels__bullets li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  background: var(--neon);
  box-shadow: 0 0 8px rgba(43, 227, 214, 0.7);
}

/* ============ 准备清单 ============ */
.page-contact .section--checklist {
  background: linear-gradient(180deg, transparent 0%, rgba(43, 21, 80, 0.28) 40%, transparent 100%);
}

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

.page-contact .checklist-col {
  min-width: 0;
}

.page-contact .checklist {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--steel);
}

.page-contact .checklist__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--steel);
}

.page-contact .checklist__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--gold);
  border: 1px solid var(--gold);
  background: rgba(214, 169, 74, 0.08);
  flex-shrink: 0;
}

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

.page-contact .checklist__title {
  margin: 0 0 0.4rem;
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--gold-bright);
}

.page-contact .checklist__desc {
  margin: 0;
  font-size: 0.90625rem;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-contact .checklist-figure {
  margin: 0;
  padding: 10px;
  background: var(--layer-2);
  border: 1px solid var(--steel);
  box-shadow: var(--shadow-stack);
}

.page-contact .checklist-figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-contact .checklist-figure__caption {
  margin-top: 0.85rem;
  font-size: 12px;
  letter-spacing: 0.06em;
  line-height: 1.7;
  color: var(--text-dim);
  padding-left: 0.75rem;
  border-left: 2px solid var(--royal);
}

/* ============ 处理流程 ============ */
.page-contact .flow {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  position: relative;
}

.page-contact .flow__step {
  position: relative;
  padding-left: 2.4rem;
}

.page-contact .flow__dot {
  position: absolute;
  left: 0;
  top: 0.2rem;
  width: 18px;
  height: 18px;
  border: 1px solid var(--steel);
  background: var(--ink);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.page-contact .flow__dot::after {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--neon);
  box-shadow: 0 0 10px rgba(43, 227, 214, 0.85);
}

.page-contact .flow__label {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
  text-transform: uppercase;
}

.page-contact .flow__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ============ 本地说明 ============ */
.page-contact .section--local {
  border-top: 1px solid var(--steel);
}

.page-contact .local__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  align-items: start;
}

.page-contact .local__text {
  margin: 0;
  max-width: 46rem;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--text);
}

.page-contact .seal {
  display: inline-grid;
  grid-template-columns: auto auto;
  align-items: stretch;
  gap: 0;
  margin: 0;
  width: max-content;
  max-width: 100%;
  border: 1px solid var(--gold);
  background: rgba(214, 169, 74, 0.07);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  transform: rotate(-1.2deg);
}

.page-contact .seal__label {
  padding: 0.5rem 0.7rem;
  color: var(--ink);
  background: var(--gold);
  letter-spacing: 0.16em;
  white-space: nowrap;
}

.page-contact .seal__value {
  padding: 0.5rem 0.85rem;
  color: var(--gold-bright);
  white-space: nowrap;
}

/* ============ 合作 ============ */
.page-contact .section--collab {
  border-top: 1px solid var(--steel);
  padding-bottom: clamp(3.5rem, 8vw, 6rem);
}

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

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

.page-contact .collab__text {
  margin: 0 0 1rem;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--text);
  max-width: 44rem;
}

.page-contact .collab__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.6rem;
}

.page-contact .collab__aside {
  padding: 1.35rem 1.25rem;
  background: linear-gradient(160deg, rgba(43, 21, 80, 0.55) 0%, var(--layer-2) 70%);
  border: 1px solid var(--steel);
  border-top: 2px solid var(--neon);
}

.page-contact .collab__aside-tag {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--neon);
}

.page-contact .collab__list {
  margin: 0 0 1.1rem;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.7rem;
}

.page-contact .collab__list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.7rem;
  align-items: baseline;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--text);
}

.page-contact .collab__list-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gold);
  border: 1px solid var(--steel);
  padding: 1px 6px;
  letter-spacing: 0.08em;
}

.page-contact .collab__aside-note {
  margin: 0;
  padding-top: 0.9rem;
  border-top: 1px dashed var(--steel);
  font-size: 12px;
  line-height: 1.75;
  color: var(--text-dim);
}

/* ============ 断点 ============ */
@media (min-width: 720px) {
  .page-contact .channels__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-contact .flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.25rem;
    padding-top: 2.25rem;
  }

  .page-contact .flow::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 0.75rem;
    height: 1px;
    background: linear-gradient(90deg, var(--steel) 0%, var(--steel) 88%, transparent 100%);
    pointer-events: none;
  }

  .page-contact .flow__step {
    padding-left: 0;
    padding-right: 0.75rem;
  }

  .page-contact .flow__dot {
    position: relative;
    top: 0;
    margin-bottom: 1rem;
    background: var(--ink);
  }

  .page-contact .checklist-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: start;
  }

  .page-contact .local__body {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 2rem;
  }
}

@media (min-width: 960px) {
  .page-contact .contact-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: clamp(2.5rem, 5vw, 4rem);
  }

  .page-contact .collab {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    gap: clamp(2rem, 5vw, 4rem);
  }

  .page-contact .channels {
    grid-template-columns: minmax(280px, 0.72fr) minmax(0, 1.28fr);
    align-items: start;
  }

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

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

  .page-contact .channels__panel {
    padding: 1.75rem 1.75rem 1.9rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card {
    transition: none;
  }
  .page-contact .channel-card:hover,
  .page-contact .channel-card[aria-selected="true"] {
    transform: none;
  }
  .page-contact .seal {
    transform: none;
  }
}