.page-contact {
  --contact-hair: rgba(174, 183, 204, 0.18);
  --contact-panel: rgba(18, 28, 61, 0.72);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding: 36px 0 52px;
  overflow: hidden;
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto -10%;
  height: 130%;
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: 0.34;
  -webkit-mask-image: radial-gradient(120% 80% at 15% 0%, #000 0%, transparent 72%);
  mask-image: radial-gradient(120% 80% at 15% 0%, #000 0%, transparent 72%);
  pointer-events: none;
  z-index: 0;
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  right: -18%;
  top: -34%;
  width: 62vw;
  height: 62vw;
  max-width: 680px;
  max-height: 680px;
  background: radial-gradient(circle, rgba(47, 227, 208, 0.13), transparent 62%);
  pointer-events: none;
  z-index: 0;
}

.page-contact .contact-hero > .container {
  position: relative;
  z-index: 1;
}

.page-contact .eyebrow {
  margin: 26px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-contact .contact-title {
  margin: 12px 0 0;
  color: var(--paper);
}

.page-contact .hero-lede {
  margin: 22px 0 0;
  max-width: 66ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--silver);
}

.page-contact .hero-status {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 30px 0 0;
  padding: 9px 14px;
  border: 1px solid var(--contact-hair);
  background: rgba(18, 28, 61, 0.5);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--silver);
}

.page-contact .hero-status::before {
  content: "";
  flex: none;
  width: 7px;
  height: 7px;
  background: var(--lime);
  box-shadow: 0 0 10px rgba(196, 249, 74, 0.65);
}

/* ---------- 渠道带 ---------- */
.page-contact .channel-band {
  border-top: 1px solid var(--grid-line);
  border-bottom: 1px solid var(--grid-line);
  background: linear-gradient(180deg, rgba(18, 28, 61, 0.85), rgba(10, 18, 38, 0.55));
}

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

.page-contact .channel {
  padding: 24px 0;
  border-top: 1px solid var(--contact-hair);
}

.page-contact .channel:first-child {
  border-top: 0;
  padding-top: 34px;
}

.page-contact .channel:last-child {
  padding-bottom: 34px;
}

.page-contact .channel-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--lime);
}

.page-contact .channel-value {
  margin: 12px 0 0;
  font-size: clamp(17px, 4.6vw, 23px);
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: 0.01em;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-contact .channel-value.mono {
  font-weight: 500;
  font-size: clamp(16px, 4.4vw, 21px);
  letter-spacing: 0.02em;
}

.page-contact .channel-note {
  margin: 12px 0 0;
  max-width: 40ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--silver);
}

/* ---------- 章节通用 ---------- */
.page-contact .section {
  padding: 64px 0;
}

.page-contact .section-head {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 36px;
}

.page-contact .chapter-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  line-height: 1;
  color: var(--silver);
}

.page-contact .section-title {
  margin: 0;
}

.page-contact .section-head .lead {
  margin: 0;
  max-width: 66ch;
}

/* ---------- 01 覆盖范围 ---------- */
.page-contact .scope-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--contact-hair);
}

.page-contact .scope-item {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  column-gap: 16px;
  row-gap: 6px;
  padding: 20px 0;
  border-bottom: 1px solid var(--contact-hair);
}

.page-contact .scope-index {
  grid-column: 1;
  grid-row: 1;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--silver);
  padding-top: 4px;
  transition: color 0.24s ease;
}

.page-contact .scope-name {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--paper);
  transition: transform 0.24s ease;
}

.page-contact .scope-desc {
  grid-column: 2;
  grid-row: 2;
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--silver);
}

.page-contact .scope-item:hover .scope-index,
.page-contact .scope-item:focus-within .scope-index {
  color: var(--lime);
}

.page-contact .scope-item:hover .scope-name,
.page-contact .scope-item:focus-within .scope-name {
  transform: translateX(4px);
}

/* ---------- 02 准备 ---------- */
.page-contact .prepare-grid {
  display: grid;
  gap: 30px;
}

.page-contact .media-frame {
  margin: 0;
}

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

.page-contact .media-frame-note {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--silver);
}

.page-contact .prepare-body .prose {
  margin: 0 0 22px;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--paper);
}

.page-contact .checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .checklist li {
  position: relative;
  padding-left: 26px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--silver);
}

.page-contact .checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 13px;
  height: 1px;
  background: var(--cyan);
}

/* ---------- 03 流转 ---------- */
.page-contact .flow {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: flow;
  border-top: 1px solid var(--contact-hair);
}

.page-contact .flow-item {
  position: relative;
  counter-increment: flow;
  padding: 22px 0 22px 52px;
  border-bottom: 1px solid var(--contact-hair);
}

.page-contact .flow-item::before {
  content: counter(flow, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 22px;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid var(--grid-line);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
}

.page-contact .flow-title {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--paper);
}

.page-contact .flow-text {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.72;
  color: var(--silver);
}

/* ---------- 04 纠错 ---------- */
.page-contact .fix-shell {
  display: grid;
  gap: 26px;
  padding: 24px;
  border: 1px solid var(--contact-hair);
  background: linear-gradient(180deg, var(--contact-panel), rgba(10, 18, 38, 0.5));
}

.page-contact .fix-body .prose {
  margin: 0 0 20px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--paper);
}

.page-contact .fix-body .checklist li::before {
  background: var(--orange);
}

/* ---------- 05 边界 ---------- */
.page-contact .limits-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  border: 1px solid var(--contact-hair);
  background: var(--contact-hair);
}

.page-contact .limit-item {
  padding: 22px 20px;
  background: var(--ink-night);
}

.page-contact .limit-title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--paper);
}

.page-contact .limit-title::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 2px;
  margin-right: 10px;
  vertical-align: middle;
  background: var(--red);
}

.page-contact .limit-text {
  margin: 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.72;
  color: var(--silver);
}

.page-contact .contact-tail {
  margin-top: 44px;
  padding-top: 24px;
  border-top: 1px solid var(--contact-hair);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px 28px;
}

.page-contact .contact-tail p {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.72;
  color: var(--silver);
}

.page-contact .contact-tail .btn {
  flex: none;
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 700px) {
  .page-contact .section {
    padding: 80px 0;
  }

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

@media (min-width: 900px) {
  .page-contact .contact-hero {
    padding: 48px 0 76px;
  }

  .page-contact .hero-lede {
    font-size: 17px;
  }

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

  .page-contact .channel {
    padding: 40px 32px 44px;
    border-top: 0;
    border-left: 1px solid var(--contact-hair);
  }

  .page-contact .channel:first-child {
    padding-top: 40px;
    padding-left: 0;
    border-left: 0;
  }

  .page-contact .channel:last-child {
    padding-bottom: 44px;
    padding-right: 0;
  }

  .page-contact .section {
    padding: 96px 0;
  }

  .page-contact .section-head {
    display: grid;
    grid-template-columns: 72px minmax(0, 1fr);
    column-gap: 24px;
    row-gap: 14px;
    align-items: start;
    margin-bottom: 52px;
  }

  .page-contact .section-head > .chapter-num {
    grid-column: 1;
    grid-row: 1;
    padding-top: 10px;
  }

  .page-contact .section-head > .section-head-body {
    grid-column: 2;
    grid-row: 1;
  }

  .page-contact .scope-item {
    grid-template-columns: 38px minmax(0, 240px) minmax(0, 1fr);
    column-gap: 24px;
    align-items: baseline;
    padding: 24px 0;
  }

  .page-contact .scope-name {
    grid-column: 2;
    grid-row: 1;
  }

  .page-contact .scope-desc {
    grid-column: 3;
    grid-row: 1;
  }

  .page-contact .prepare-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 48px;
    align-items: start;
  }

  .page-contact .prepare-body {
    padding-top: 4px;
  }

  .page-contact .fix-shell {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 44px;
    padding: 36px;
    align-items: center;
  }
}
</page_css>