.page-contact {
  --pc-pad: 24px;
  --pc-gap: 16px;
  display: block;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding-top: var(--sp-3);
  padding-bottom: var(--sp-5);
  background:
    radial-gradient(130% 96% at 10% 0%, rgba(15, 58, 84, .9) 0%, rgba(7, 26, 47, 0) 62%),
    radial-gradient(84% 74% at 94% 8%, rgba(53, 242, 214, .13) 0%, rgba(7, 26, 47, 0) 58%);
  border-bottom: 1px solid var(--c-line-soft);
}

.page-contact .contact-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-3);
  align-items: start;
}

.page-contact .contact-hero-mark {
  display: none;
  color: var(--c-mist);
}

.page-contact .contact-hero-main .eyebrow {
  color: var(--c-cyan);
  letter-spacing: .28em;
}

.page-contact .contact-hero-main .display-title {
  margin: var(--sp-1) 0 0;
  color: var(--c-white);
}

.page-contact .contact-hero-main .lede {
  margin-top: var(--sp-2);
  max-width: 62ch;
  color: var(--c-text-soft);
}

.page-contact .contact-hero-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  gap: 1px;
  margin-top: var(--sp-3);
  background: var(--c-line-soft);
  border: 1px solid var(--c-line-soft);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-contact .contact-fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px;
  background: rgba(14, 39, 64, .78);
  transition: background var(--dur) var(--ease);
}

.page-contact .contact-fact:hover {
  background: rgba(14, 39, 64, 1);
}

.page-contact .contact-fact-key {
  font-size: var(--fs-micro);
  letter-spacing: .2em;
  color: var(--c-mist);
}

.page-contact .contact-fact-val {
  font-size: var(--fs-h3);
  font-weight: 700;
  color: var(--c-white);
  line-height: 1.2;
}

.page-contact .contact-hero-figure {
  margin: var(--sp-4) 0 0;
}

/* ---------- 两栏主体 ---------- */
.page-contact .contact-body {
  padding-top: var(--sp-5);
  padding-bottom: var(--sp-5);
}

.page-contact .contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-4);
}

.page-contact .contact-sub {
  margin-top: var(--sp-2);
  max-width: 66ch;
  color: var(--c-text-soft);
}

/* 清单 */
.page-contact .check-list {
  list-style: none;
  margin: var(--sp-3) 0 0;
  padding: 0;
}

.page-contact .check-item {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--c-line-soft);
}

.page-contact .check-item:first-child {
  border-top: 1px solid var(--c-line-soft);
}

.page-contact .check-mark::before {
  content: "";
  display: block;
  width: 8px;
  height: 8px;
  margin-top: 9px;
  border-radius: 2px;
  background: var(--c-cyan);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-contact .check-item:hover .check-mark::before {
  transform: rotate(45deg);
  background: var(--c-gold);
}

.page-contact .check-title {
  margin: 0;
  font-size: var(--fs-h3);
  font-weight: 700;
  color: var(--c-white);
}

.page-contact .check-text {
  margin: 6px 0 0;
  font-size: var(--fs-small);
  line-height: 1.75;
  color: var(--c-text-soft);
}

.page-contact .contact-main-col .fold {
  margin-top: var(--sp-4);
}

.page-contact .contact-main-col .fold-body {
  color: var(--c-text-soft);
}

/* 渠道卡 */
.page-contact .channel-card {
  padding: var(--pc-pad);
  border: 1px solid rgba(53, 242, 214, .42);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, rgba(14, 39, 64, .96) 0%, rgba(10, 33, 55, .96) 100%);
  box-shadow: 0 22px 44px -36px rgba(3, 11, 22, .95);
}

.page-contact .channel-title {
  margin: 0;
  font-size: var(--fs-h3);
  font-weight: 700;
  color: var(--c-white);
}

.page-contact .channel-sub {
  margin: 8px 0 0;
  font-size: var(--fs-small);
  line-height: 1.7;
  color: var(--c-text-soft);
}

.page-contact .channel-list {
  list-style: none;
  margin: var(--sp-3) 0 0;
  padding: 0;
}

.page-contact .channel-item {
  padding: 16px 0;
  border-top: 1px solid var(--c-line-soft);
}

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

.page-contact .channel-key {
  display: block;
  margin-bottom: 7px;
  font-size: var(--fs-micro);
  letter-spacing: .2em;
  color: var(--c-mist);
}

.page-contact .channel-value {
  display: block;
  font-size: 16px;
  line-height: 1.5;
  color: var(--c-white);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  word-break: break-all;
  user-select: all;
  -webkit-user-select: all;
}

.page-contact .channel-value--accent {
  color: var(--c-cyan);
}

.page-contact .channel-hint {
  display: block;
  margin-top: 5px;
  font-size: var(--fs-micro);
  letter-spacing: .06em;
  color: var(--c-grid);
}

.page-contact .channel-note {
  margin: 8px 0 0;
  font-size: var(--fs-small);
  line-height: 1.65;
  color: var(--c-text-soft);
}

/* ---------- 流程 ---------- */
.page-contact .contact-flow {
  padding-top: var(--sp-5);
  padding-bottom: var(--sp-5);
}

.page-contact .flow-bar {
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: var(--sp-4) 0 0;
  padding: 0;
  background: var(--c-line-soft);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-contact .flow-seg {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px 22px;
  background: var(--c-panel);
  border-top: 3px solid var(--c-line-2);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .flow-seg.step-01,
.page-contact .flow-seg.step-02,
.page-contact .flow-seg.step-03 {
  border-top-color: var(--c-cyan);
}

.page-contact .flow-seg.step-04 {
  border-top-color: var(--c-gold);
}

.page-contact .flow-seg-num {
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--c-white);
}

.page-contact .flow-seg-name {
  font-size: var(--fs-body);
  font-weight: 700;
  color: var(--c-white);
}

.page-contact .flow-seg-text {
  font-size: var(--fs-small);
  line-height: 1.65;
  color: var(--c-text-soft);
}

.page-contact .stage-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-3);
  margin-top: var(--sp-4);
}

.page-contact .stage-item {
  padding: 4px 0 4px 18px;
  border-left: 2px solid var(--c-line);
  transition: border-color var(--dur) var(--ease);
}

.page-contact .stage-item:hover {
  border-left-color: var(--c-cyan);
}

.page-contact .stage-title {
  margin: 0;
  font-size: var(--fs-h3);
  font-weight: 700;
  color: var(--c-white);
}

.page-contact .stage-title .mono {
  margin-right: 8px;
  font-size: var(--fs-small);
  color: var(--c-gold);
}

.page-contact .stage-text {
  margin: 8px 0 0;
  font-size: var(--fs-small);
  line-height: 1.75;
  color: var(--c-text-soft);
}

/* 悬停高亮联动（渐进增强，无 :has 支持时内容依然完整） */
.page-contact:has(.stage-item.step-01:hover) .flow-seg.step-01,
.page-contact:has(.stage-item.step-02:hover) .flow-seg.step-02,
.page-contact:has(.stage-item.step-03:hover) .flow-seg.step-03,
.page-contact:has(.stage-item.step-04:hover) .flow-seg.step-04 {
  background: rgba(53, 242, 214, .12);
  border-top-color: var(--c-cyan);
}

.page-contact .contact-flow-figure {
  margin: var(--sp-4) 0 0;
}

/* ---------- 不受理范围 ---------- */
.page-contact .contact-scope {
  padding-top: var(--sp-5);
  padding-bottom: var(--sp-5);
}

.page-contact .scope-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-4);
}

.page-contact .scope-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .scope-item {
  padding: 16px 18px;
  border-left: 3px solid var(--c-coral);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: rgba(14, 39, 64, .6);
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-contact .scope-item:hover {
  background: rgba(14, 39, 64, .92);
  transform: translateX(3px);
}

.page-contact .scope-title {
  margin: 0;
  font-size: var(--fs-h3);
  font-weight: 700;
  color: var(--c-white);
}

.page-contact .scope-text {
  margin: 7px 0 0;
  font-size: var(--fs-small);
  line-height: 1.7;
  color: var(--c-text-soft);
}

/* ---------- 用途说明 ---------- */
.page-contact .contact-usage {
  padding-top: var(--sp-5);
  padding-bottom: var(--sp-6);
}

.page-contact .usage-panel {
  padding: clamp(24px, 4vw, 48px);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  background: linear-gradient(135deg, rgba(15, 58, 84, .62) 0%, rgba(7, 26, 47, .18) 70%);
}

.page-contact .usage-lead {
  margin: var(--sp-2) 0 0;
  max-width: 66ch;
  color: var(--c-text-soft);
}

.page-contact .usage-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: var(--sp-3);
}

.page-contact .usage-meta {
  margin: var(--sp-3) 0 0;
  padding-top: var(--sp-3);
  border-top: 1px solid var(--c-line-soft);
  max-width: 74ch;
  font-size: var(--fs-small);
  line-height: 1.8;
  color: var(--c-text-soft);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .stage-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--sp-3) var(--sp-4);
  }
}

@media (min-width: 820px) {
  .page-contact .flow-bar {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero-grid {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: var(--sp-3) var(--sp-4);
  }

  .page-contact .contact-hero-mark {
    display: block;
    padding-top: 12px;
  }

  .page-contact .scope-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 5fr);
    gap: var(--sp-5);
  }

  .page-contact .scope-lead {
    position: sticky;
    top: 112px;
  }
}

@media (min-width: 1000px) {
  .page-contact .contact-layout {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: var(--sp-5);
    align-items: start;
  }

  .page-contact .contact-side-col {
    position: sticky;
    top: 112px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-fact,
  .page-contact .check-mark::before,
  .page-contact .flow-seg,
  .page-contact .stage-item,
  .page-contact .scope-item {
    transition: none;
  }

  .page-contact .scope-item:hover {
    transform: none;
  }
}