.page-contact {
  --pc-wrap: min(100% - (var(--gutter) * 2), var(--shell));
  --pc-block: clamp(56px, 8vw, 104px);
  --pc-radius: clamp(18px, 2.4vw, 28px);
  --pc-soft: rgba(238, 243, 245, 0.68);
  padding-block: clamp(20px, 3.5vw, 40px) clamp(64px, 9vw, 120px);
  background: var(--snow);
  color: var(--text);
}

.page-contact .contact-wrap {
  width: var(--pc-wrap);
  margin-inline: auto;
}

/* ---------- 面包屑 ---------- */
.page-contact .breadcrumb {
  margin-bottom: clamp(20px, 3vw, 36px);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  padding-bottom: clamp(32px, 5vw, 56px);
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-hero__title {
  margin: 0 0 16px;
  font-size: clamp(40px, 8vw, 76px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1;
}

.page-contact .contact-hero__lead {
  margin: 0;
  max-width: 46ch;
  font-size: 17px;
  line-height: 1.75;
  color: var(--text);
}

.page-contact .contact-hero__aside {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
  padding-top: 4px;
}

.page-contact .contact-hero__hint {
  margin: 0;
  max-width: 40ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--sand);
}

/* ---------- 章节通用 ---------- */
.page-contact .contact-block {
  padding-top: var(--pc-block);
}

/* ---------- 渠道面板 ---------- */
.page-contact .channel-layout {
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
  margin-top: clamp(24px, 3.5vw, 40px);
}

.page-contact .channel-board {
  display: grid;
  padding: clamp(20px, 3vw, 34px);
  background: var(--ink);
  border-radius: var(--pc-radius);
  color: #EEF3F5;
}

.page-contact .channel-item {
  padding: 22px 0;
  border-top: 1px solid rgba(180, 195, 203, 0.22);
}

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

.page-contact .channel-item:last-child {
  padding-bottom: 0;
}

.page-contact .channel-item__key {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--pulse);
}

.page-contact .channel-item__value {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: clamp(17px, 2.4vw, 22px);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.35;
  color: #EEF3F5;
  word-break: break-word;
}

.page-contact .channel-item__use {
  margin: 0;
  max-width: 52ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--pc-soft);
}

.page-contact .channel-figure {
  position: relative;
  margin: 0;
  aspect-ratio: 16 / 10;
  border-radius: var(--pc-radius);
  overflow: hidden;
  background: var(--ink-soft);
}

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

.page-contact .channel-figure figcaption {
  position: absolute;
  inset: auto 0 0 0;
  padding: 48px 20px 16px;
  font-size: 13px;
  line-height: 1.65;
  color: #EEF3F5;
  background: linear-gradient(to top, rgba(13, 20, 24, 0.94), rgba(13, 20, 24, 0));
}

/* ---------- 坐标索引图 ---------- */
.page-contact .coord-figure {
  display: grid;
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--pc-radius);
  overflow: hidden;
  background: #FFFFFF;
}

.page-contact .coord-figure img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 180px;
  object-fit: cover;
}

.page-contact .coord-figure__caption {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: clamp(18px, 2.6vw, 26px);
  font-size: 14px;
  line-height: 1.75;
  color: var(--sand);
}

.page-contact .coord-figure__key {
  flex: none;
  padding: 2px 12px;
  border-radius: var(--r-pill);
  background: var(--snow-mid);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--copper-deep);
}

/* ---------- 纠错步骤 ---------- */
.page-contact .fix-steps {
  list-style: none;
  margin: clamp(24px, 3.5vw, 40px) 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-contact .fix-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .fix-step__num {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--copper);
  padding-top: 3px;
}

.page-contact .fix-step__title {
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.4;
}

.page-contact .fix-step__body p {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
}

.page-contact .fix-note {
  margin: clamp(20px, 2.8vw, 28px) 0 0;
  padding: 18px 20px;
  border-left: 3px solid var(--copper);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: var(--snow-mid);
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
}

/* ---------- 类型分流 ---------- */
.page-contact .route-list {
  display: grid;
  gap: 14px;
  margin-top: clamp(24px, 3.5vw, 40px);
}

.page-contact .route-fold {
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-contact .route-fold .fold-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 6px 16px;
  width: 100%;
  padding: 18px 20px;
  margin: 0;
  background: none;
  border: 0;
  border-radius: 0;
  font: inherit;
  color: var(--text);
  text-align: left;
  cursor: pointer;
  transition: background var(--dur) var(--ease);
}

.page-contact .route-fold .fold-head:hover {
  background: var(--snow-mid);
}

.page-contact .route-fold .fold-head[aria-expanded="true"] {
  background: var(--snow-mid);
}

.page-contact .route-fold__name {
  flex: none;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--copper-deep);
}

.page-contact .route-fold__scope {
  flex: 1 1 16ch;
  font-size: 14px;
  line-height: 1.6;
  color: var(--sand);
}

.page-contact .route-fold .fold-head__arrow {
  flex: none;
  margin-left: auto;
  align-self: center;
}

.page-contact .route-fold .fold-panel__inner {
  padding: 0 20px 20px;
  border-top: 1px solid var(--line);
}

.page-contact .route-fold .fold-panel__inner p {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
}

.page-contact .route-fold .fold-panel__inner a {
  color: var(--copper-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 渠道边界 ---------- */
.page-contact .boundary-grid {
  display: grid;
  gap: clamp(18px, 2.6vw, 28px);
  margin-top: clamp(24px, 3.5vw, 40px);
}

.page-contact .boundary-copy {
  display: grid;
  gap: 16px;
}

.page-contact .boundary-copy p {
  margin: 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
}

.page-contact .boundary-card {
  padding: clamp(24px, 3.4vw, 36px);
  background: var(--copper);
  border-radius: var(--pc-radius);
  color: #EEF3F5;
}

.page-contact .boundary-card__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: rgba(238, 243, 245, 0.82);
}

.page-contact .boundary-card__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(24px, 4vw, 34px);
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.2;
  color: #FFFFFF;
  font-variant-numeric: tabular-nums;
}

.page-contact .boundary-card__unit {
  margin: 6px 0 18px;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: rgba(238, 243, 245, 0.8);
}

.page-contact .boundary-card__note {
  margin: 0;
  padding-top: 18px;
  border-top: 1px solid rgba(238, 243, 245, 0.34);
  font-size: 14px;
  line-height: 1.75;
  color: rgba(238, 243, 245, 0.92);
}

/* ---------- 行动区 ---------- */
.page-contact .contact-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3.5vw, 36px);
}

.page-contact .contact-next__line {
  margin: clamp(20px, 2.8vw, 28px) 0 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sand);
}

.page-contact .contact-next__line a {
  color: var(--copper-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 回到顶部 ---------- */
.page-contact .contact-topline {
  margin: clamp(40px, 6vw, 72px) 0 0;
  display: flex;
  justify-content: flex-end;
}

.page-contact .top-chip {
  display: inline-flex;
  align-items: center;
  padding: 9px 20px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: var(--snow-mid);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-contact .top-chip:hover,
.page-contact .top-chip:focus-visible {
  border-color: var(--copper);
  color: var(--copper-deep);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-contact .fix-step {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 24px;
    padding: 26px 0;
  }

  .page-contact .fix-steps {
    margin-top: clamp(28px, 4vw, 44px);
  }
}

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

  .page-contact .contact-hero__aside {
    align-items: flex-end;
    text-align: right;
    padding-bottom: 6px;
  }

  .page-contact .channel-layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-contact .channel-figure {
    aspect-ratio: auto;
    min-height: 100%;
  }

  .page-contact .coord-figure {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: stretch;
  }

  .page-contact .coord-figure img {
    min-height: 220px;
  }

  .page-contact .route-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    align-items: start;
  }

  .page-contact .boundary-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .route-fold .fold-head,
  .page-contact .top-chip {
    transition: none;
  }
}