.page-contact {
  --pc-amber-ink: #8A4A0B;
  --pc-dark-rule: rgba(38, 52, 63, .85);
  --pc-pad-y: 56px;
  background-color: var(--navy);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.page-contact *,
.page-contact *::before,
.page-contact *::after { box-sizing: border-box; }

.page-contact h1,
.page-contact h2,
.page-contact h3,
.page-contact p { margin: 0; }

.page-contact [data-tab-panel][hidden] { display: none; }

.page-contact :focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 2px;
}

/* ---------- 首屏 ---------- */
.page-contact .pc-hero {
  position: relative;
  padding: 24px 0 48px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 84% 0%, rgba(62, 240, 140, .08) 0%, rgba(62, 240, 140, 0) 58%),
    linear-gradient(180deg, var(--navy) 0%, var(--navy-card) 100%);
}

.page-contact .pc-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(180deg, rgba(245, 248, 251, .05) 0 1px, transparent 1px 7px);
  opacity: .6;
}

.page-contact .pc-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

.page-contact .breadcrumb { margin: 0 0 22px; }

.page-contact .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .breadcrumb-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--grey);
}

.page-contact .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: var(--line);
}

.page-contact .breadcrumb-link {
  color: var(--grey);
  text-decoration: none;
  transition: color var(--t-fast) var(--ease);
}

.page-contact .breadcrumb-link:hover { color: var(--green); }

.page-contact .pc-kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-contact h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(34px, 8vw, 62px);
  line-height: 1.04;
  letter-spacing: .01em;
  color: var(--white);
}

.page-contact .pc-hero-lead {
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--grey);
}

.page-contact .pc-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-contact .pc-hero-media {
  margin: 0;
  border: 1px solid var(--line);
  background-color: var(--char);
}

.page-contact .pc-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 通用章节 ---------- */
.page-contact .pc-section { padding: 56px 0; }

.page-contact .pc-head {
  max-width: 64ch;
  margin-bottom: 30px;
}

.page-contact .pc-index {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .24em;
  color: var(--amber);
}

.page-contact .pc-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(24px, 4.6vw, 38px);
  line-height: 1.12;
  letter-spacing: .02em;
  color: var(--white);
}

.page-contact .pc-note {
  font-size: 15px;
  line-height: 1.75;
  color: var(--grey);
}

/* ---------- 通道切换 ---------- */
.page-contact .pc-channels {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}

.page-contact .pc-rail {
  display: grid;
  align-content: start;
  border-left: 2px solid var(--line);
}

.page-contact .pc-tab {
  position: relative;
  display: grid;
  gap: 4px;
  width: 100%;
  padding: 14px 16px 14px 18px;
  border: 0;
  border-bottom: 1px solid var(--pc-dark-rule);
  background: transparent;
  color: var(--grey);
  text-align: left;
  font: inherit;
  cursor: pointer;
  transition: color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease);
}

.page-contact .pc-tab::before {
  content: "";
  position: absolute;
  left: -2px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: transparent;
  transition: background-color var(--t-base) var(--ease);
}

.page-contact .pc-tab:hover { color: var(--white); }

.page-contact .pc-tab[aria-selected="true"] {
  color: var(--white);
  background-color: rgba(62, 240, 140, .07);
}

.page-contact .pc-tab[aria-selected="true"]::before { background-color: var(--green); }

.page-contact .pc-tab-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--amber);
  transition: color var(--t-base) var(--ease);
}

.page-contact .pc-tab[aria-selected="true"] .pc-tab-num { color: var(--green); }

.page-contact .pc-tab-name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: .02em;
}

.page-contact .pc-tab-hint {
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--grey);
}

.page-contact .pc-panel {
  padding: 24px 20px 28px;
  border: 1px solid var(--line);
  background-color: var(--navy-card);
}

.page-contact .pc-panel-title {
  margin: 14px 0 12px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(21px, 4vw, 30px);
  line-height: 1.16;
  letter-spacing: .02em;
  color: var(--white);
}

.page-contact .pc-panel-lead {
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--grey);
}

.page-contact .pc-spec {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .pc-spec li {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-top: 1px solid var(--pc-dark-rule);
}

.page-contact .pc-spec-key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--amber);
}

.page-contact .pc-spec-val {
  font-size: 15px;
  line-height: 1.75;
  color: var(--white);
}

.page-contact .pc-em {
  font-family: var(--font-mono);
  color: var(--green);
  word-break: break-all;
}

/* ---------- 联系方式信息带 ---------- */
.page-contact .pc-band {
  padding: 48px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background-color: var(--char);
}

.page-contact .pc-band-title {
  margin: 0 0 22px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(22px, 4vw, 32px);
  letter-spacing: .02em;
  color: var(--white);
}

.page-contact .pc-band-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  border: 1px solid var(--line);
  background-color: var(--line);
}

.page-contact .pc-band-cell {
  display: grid;
  align-content: start;
  gap: 10px;
  padding: 22px 18px 24px;
  background-color: var(--char);
}

.page-contact .pc-band-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--grey);
}

.page-contact .pc-band-value {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(24px, 6vw, 34px);
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--green);
  overflow-wrap: anywhere;
  -webkit-user-select: all;
  user-select: all;
}

.page-contact .pc-band-value--mail {
  font-size: clamp(15px, 4vw, 21px);
  letter-spacing: 0;
}

.page-contact .pc-band-note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--grey);
}

.page-contact .pc-band-foot {
  margin-top: 18px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--grey);
}

/* ---------- 通信地址（纸白章节） ---------- */
.page-contact .pc-addr {
  padding: 56px 0;
  background-color: var(--paper);
  color: var(--ink);
}

.page-contact .pc-addr-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  align-items: center;
}

.page-contact .pc-index--ink { color: var(--pc-amber-ink); }

.page-contact .pc-title--ink { color: var(--ink); }

.page-contact .pc-addr-lead {
  max-width: 56ch;
  margin-bottom: 22px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-muted);
}

.page-contact .pc-addr-card {
  display: grid;
  gap: 6px;
  margin: 0;
  padding: 20px 22px;
  border: 1px solid var(--paper-line);
  background-color: var(--white);
  box-shadow: var(--shadow-paper);
  font-style: normal;
}

.page-contact .pc-addr-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--pc-amber-ink);
}

.page-contact .pc-addr-line {
  font-family: var(--font-display);
  font-size: clamp(19px, 3.4vw, 25px);
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: .02em;
  color: var(--ink);
  -webkit-user-select: all;
  user-select: all;
}

.page-contact .pc-addr-note {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-muted);
}

.page-contact .pc-addr-graphic {
  color: var(--ink);
}

.page-contact .pc-addr-graphic svg {
  display: block;
  width: 100%;
  max-width: 520px;
  height: auto;
  margin: 0 auto;
}

/* ---------- 提交前准备 ---------- */
.page-contact .pc-prep-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

.page-contact .pc-prep-media {
  margin: 0;
  border: 1px solid var(--line);
  background-color: var(--char);
}

.page-contact .pc-prep-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-contact .pc-prep-copy .pc-note { margin-bottom: 18px; }

.page-contact .pc-prep-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: prep;
}

.page-contact .pc-prep-list li {
  position: relative;
  padding: 15px 0 15px 46px;
  border-top: 1px solid var(--pc-dark-rule);
  font-size: 15px;
  line-height: 1.72;
  color: var(--grey);
}

.page-contact .pc-prep-list li::before {
  counter-increment: prep;
  content: counter(prep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 16px;
  width: 28px;
  padding: 2px 0;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  text-align: center;
  color: var(--green);
}

.page-contact .pc-prep-list li strong {
  display: block;
  margin-bottom: 2px;
  font-size: 15px;
  font-weight: 600;
  color: var(--white);
}

/* ---------- 响应节奏 ---------- */
.page-contact .pc-section--tight { padding-bottom: 48px; }

.page-contact .pc-pace {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .pc-pace li {
  display: grid;
  gap: 8px;
  padding: 20px 0;
  border-top: 1px solid var(--pc-dark-rule);
}

.page-contact .pc-pace-time {
  font-family: var(--font-mono);
  font-size: clamp(19px, 4vw, 24px);
  font-weight: 600;
  letter-spacing: .01em;
  color: var(--amber);
}

.page-contact .pc-pace-body h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--white);
}

.page-contact .pc-pace-body p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--grey);
}

/* ---------- 收尾 ---------- */
.page-contact .pc-closing {
  padding: 52px 0 68px;
  border-top: 1px solid var(--line);
  background-color: var(--navy-card);
}

.page-contact .pc-closing-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.page-contact .pc-closing-copy .pc-note { max-width: 58ch; }

.page-contact .pc-closing-fine {
  margin-top: 16px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--grey);
}

.page-contact .pc-closing-fine a {
  color: var(--green);
  text-decoration: none;
  border-bottom: 1px solid rgba(62, 240, 140, .4);
}

.page-contact .pc-closing-fine a:hover { border-bottom-color: var(--green); }

.page-contact .pc-closing-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .pc-band-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-contact .pc-band-cell:last-child { grid-column: span 2; }
}

@media (min-width: 760px) {
  .page-contact .pc-spec li {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 22px;
    align-items: baseline;
  }
  .page-contact .pc-spec-key { padding-top: 3px; }
}

@media (min-width: 900px) {
  .page-contact { --pc-pad-y: 88px; }

  .page-contact .pc-hero { padding: 32px 0 84px; }
  .page-contact .pc-hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.04fr);
    gap: 56px;
    align-items: center;
  }

  .page-contact .pc-section { padding: var(--pc-pad-y) 0; }
  .page-contact .pc-section--tight { padding-bottom: 88px; }

  .page-contact .pc-channels {
    grid-template-columns: 268px minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

  .page-contact .pc-rail { position: sticky; top: 96px; }

  .page-contact .pc-panel { padding: 34px 36px 38px; }

  .page-contact .pc-band { padding: 64px 0; }
  .page-contact .pc-band-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .page-contact .pc-band-cell { padding: 30px 26px 32px; }
  .page-contact .pc-band-cell:last-child { grid-column: auto; }

  .page-contact .pc-addr { padding: 88px 0; }
  .page-contact .pc-addr-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    gap: 60px;
  }

  .page-contact .pc-prep-grid {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
    gap: 56px;
    align-items: start;
  }

  .page-contact .pc-pace li {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 30px;
    align-items: baseline;
  }

  .page-contact .pc-closing { padding: 68px 0 88px; }
  .page-contact .pc-closing-grid {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 48px;
    align-items: start;
  }
  .page-contact .pc-closing-links { flex-direction: column; align-items: flex-start; }
}

@media (min-width: 1180px) {
  .page-contact .pc-channels { grid-template-columns: 300px minmax(0, 1fr); gap: 56px; }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact *,
  .page-contact *::before,
  .page-contact *::after {
    transition-duration: 1ms !important;
    animation-duration: 1ms !important;
  }
}