.page-contact {
  --ct-border: 2px solid var(--ink);
  --ct-shadow-lg: 10px 10px 0 var(--ink);
  --ct-shadow-sm: 6px 6px 0 var(--ink);
  --ct-rule: 1px solid var(--grid-line);
  color: var(--ink);
}

/* ---------- 面包屑与首屏 ---------- */

.page-contact .crumbs {
  padding-top: 30px;
}

.page-contact .contact-hero {
  padding: 26px 0 6px;
}

.page-contact .contact-hero .display--xl {
  margin: 12px 0 0;
  max-width: 17ch;
}

.page-contact .contact-hero .lede {
  margin: 22px 0 0;
  max-width: 60ch;
}

.page-contact .hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

/* ---------- 主体分栏 ---------- */

.page-contact .contact-board-section {
  padding-top: 48px;
}

.page-contact .contact-board {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 52px;
}

@media (min-width: 960px) {
  .page-contact .contact-board {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 54px;
    align-items: start;
  }
}

/* ---------- 左侧：地图 + 联系卡片 ---------- */

.page-contact .contact-aside {
  position: relative;
}

.page-contact .aside-map {
  position: relative;
  border: var(--ct-border);
  overflow: hidden;
  background: var(--deep-blue);
}

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

.page-contact .contact-card {
  position: relative;
  z-index: 2;
  margin: -64px 14px 0;
  padding: 26px 22px 30px;
  background: var(--paper);
  border: var(--ct-border);
  box-shadow: var(--ct-shadow-lg);
}

.page-contact .contact-card__title {
  margin: 8px 0 4px;
  font-family: var(--font-display);
  font-size: clamp(22px, 4.4vw, 27px);
  font-weight: 700;
  letter-spacing: .07em;
  line-height: 1.2;
  color: var(--night-blue);
}

.page-contact .channel {
  padding: 22px 0 0;
}

.page-contact .channel + .channel {
  margin-top: 22px;
  border-top: var(--ct-rule);
}

.page-contact .channel__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-contact .channel__value {
  display: inline-block;
  max-width: 100%;
  margin-top: 10px;
  padding-bottom: 4px;
  font-family: var(--font-mono);
  font-size: clamp(14px, 3.4vw, 18px);
  font-weight: 700;
  color: var(--night-blue);
  text-decoration: none;
  border-bottom: 2px solid var(--lamp-orange);
  overflow-wrap: anywhere;
}

.page-contact .channel__value:hover,
.page-contact .channel__value:focus-visible {
  color: var(--lamp-orange);
}

.page-contact .channel__desc {
  margin: 14px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
}

.page-contact .channel__samples {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height var(--speed-state) ease, opacity var(--speed-state) ease, margin-top var(--speed-state) ease;
}

.page-contact .channel__samples li {
  position: relative;
  padding-left: 18px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--lime);
}

.page-contact .channel__samples li + li {
  margin-top: 6px;
}

.page-contact .channel__samples li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 10px;
  height: 1px;
  background: var(--lamp-orange);
}

.page-contact .channel:hover .channel__samples,
.page-contact .channel:focus-within .channel__samples {
  max-height: 320px;
  opacity: 1;
  margin-top: 14px;
}

@media (hover: none) {
  .page-contact .channel__samples {
    max-height: none;
    opacity: 1;
    margin-top: 14px;
  }
}

/* ---------- 右侧：三步同步流程 ---------- */

.page-contact .contact-sync__title {
  margin: 10px 0 0;
  max-width: 14ch;
}

.page-contact .contact-sync__lede {
  margin: 18px 0 0;
  max-width: 54ch;
  font-size: 15.5px;
  line-height: 1.85;
}

.page-contact .contact-sync__lede a {
  color: var(--night-blue);
  text-decoration: none;
  border-bottom: 2px solid var(--amber);
}

.page-contact .contact-sync__lede a:hover {
  color: var(--lamp-orange);
  border-bottom-color: var(--lamp-orange);
}

.page-contact .sync-steps {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
}

.page-contact .sync-step {
  position: relative;
  padding: 0 0 30px 58px;
}

.page-contact .sync-step:last-child {
  padding-bottom: 0;
}

.page-contact .sync-step::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 44px;
  bottom: 6px;
  width: 1px;
  background: var(--grid-line);
}

.page-contact .sync-step:last-child::before {
  display: none;
}

.page-contact .sync-step__num {
  position: absolute;
  left: 0;
  top: -6px;
  font-family: var(--font-mono);
  font-size: clamp(24px, 4.2vw, 30px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--lamp-orange);
}

.page-contact .sync-step .expander__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin: 0;
  padding-bottom: 8px;
  font-family: var(--font-display);
  font-size: clamp(17px, 3.2vw, 20px);
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--night-blue);
  border-bottom: 2px solid var(--ink);
  cursor: pointer;
}

.page-contact .sync-step .expander__mark {
  flex: none;
  width: 10px;
  height: 10px;
  background: var(--lamp-orange);
}

.page-contact .sync-step .expander__body p {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.85;
}

.page-contact .sync-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-contact .sync-list li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.75;
}

.page-contact .sync-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 12px;
  height: 1px;
  background: var(--silver);
}

/* ---------- 准备清单 ---------- */

.page-contact .contact-prep {
  padding-top: 76px;
}

.page-contact .prep-panel {
  padding: 30px 22px 30px;
  background: var(--cream);
  border: var(--ct-border);
  box-shadow: var(--ct-shadow-lg);
}

@media (min-width: 760px) {
  .page-contact .prep-panel {
    padding: 40px 44px 38px;
  }
}

.page-contact .prep-panel .display {
  margin: 10px 0 0;
}

.page-contact .prep-lede {
  margin: 16px 0 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.85;
}

.page-contact .prep-list {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.page-contact .prep-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px 18px;
  background: var(--paper);
  border: 1px solid rgba(34, 28, 23, .18);
  cursor: pointer;
  transition: border-color var(--speed-state) ease, background-color var(--speed-state) ease;
}

.page-contact .prep-item:hover {
  border-color: var(--ink);
}

.page-contact .prep-item input {
  flex: none;
  width: 20px;
  height: 20px;
  margin: 2px 0 0;
  accent-color: var(--lamp-orange);
  cursor: pointer;
}

.page-contact .prep-item:has(input:checked) {
  background: #FFFDF7;
  border-color: var(--grass);
}

.page-contact .prep-item__name {
  display: block;
  font-size: 15.5px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--night-blue);
}

.page-contact .prep-item__desc {
  display: block;
  margin-top: 7px;
  font-size: 14px;
  line-height: 1.75;
}

.page-contact .prep-hint {
  display: block;
  margin: 24px 0 0;
  padding: 16px 18px;
  background: var(--paper);
  border-left: 4px solid var(--grass);
  font-size: 14.5px;
  line-height: 1.8;
}

.page-contact .prep-list:has(input:not(:checked)) + .prep-hint {
  display: none;
}

/* ---------- 回复节奏 ---------- */

.page-contact .contact-rhythm {
  padding-top: 80px;
}

.page-contact .rhythm-head .display {
  margin: 10px 0 0;
}

.page-contact .rhythm-list {
  margin-top: 32px;
  border-top: 2px solid var(--ink);
}

.page-contact .rhythm-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 20px 0;
  border-bottom: 1px solid var(--grid-line);
}

@media (min-width: 700px) {
  .page-contact .rhythm-item {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 26px;
    align-items: baseline;
  }
}

.page-contact .rhythm-item__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--lamp-orange);
}

.page-contact .rhythm-item__val {
  font-size: 15.5px;
  line-height: 1.8;
}

/* ---------- 档案纠错 ---------- */

.page-contact .contact-fix {
  padding-top: 80px;
}

.page-contact .fix-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
}

@media (min-width: 900px) {
  .page-contact .fix-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 54px;
    align-items: start;
  }
}

.page-contact .fix-copy .display {
  margin: 10px 0 0;
}

.page-contact .fix-copy p {
  margin: 18px 0 0;
  font-size: 15.5px;
  line-height: 1.85;
}

.page-contact .fix-copy a {
  color: var(--night-blue);
  text-decoration: none;
  border-bottom: 2px solid var(--amber);
}

.page-contact .fix-copy a:hover {
  color: var(--lamp-orange);
  border-bottom-color: var(--lamp-orange);
}

.page-contact .fix-figure {
  margin: 0;
}

.page-contact .fix-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: var(--ct-border);
  box-shadow: var(--ct-shadow-sm);
}

.page-contact .fix-figure figcaption {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.75;
  letter-spacing: .04em;
  color: var(--lime);
}

/* ---------- 备案信息带 ---------- */

.page-contact .contact-legal {
  margin-top: 88px;
  padding: 32px 0;
  background: var(--deep-blue);
  border-top: 2px solid var(--ink);
  color: var(--silver);
}

.page-contact .contact-legal__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .05em;
}

@media (min-width: 780px) {
  .page-contact .contact-legal__inner {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px 48px;
  }
}

.page-contact .legal-item {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.page-contact .legal-item__key {
  color: var(--amber);
  letter-spacing: .18em;
}

.page-contact .legal-item__val {
  color: var(--cream);
  overflow-wrap: anywhere;
}

/* ---------- 窄屏保护 ---------- */

@media (max-width: 640px) {
  .page-contact {
    --ct-shadow-lg: 4px 4px 0 var(--ink);
    --ct-shadow-sm: 3px 3px 0 var(--ink);
  }

  .page-contact .contact-card {
    margin: -46px 10px 0;
  }

  .page-contact .sync-step {
    padding-left: 48px;
  }

  .page-contact .sync-step::before {
    left: 17px;
  }

  .page-contact .contact-rhythm,
  .page-contact .contact-fix,
  .page-contact .contact-prep {
    padding-top: 60px;
  }

  .page-contact .contact-legal {
    margin-top: 64px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel__samples,
  .page-contact .prep-item {
    transition: none;
  }
}