/* ============================================================
   联系品牌 · page-contact
   ============================================================ */

.page-contact {
  --contact-ring: 0 0 0 3px color-mix(in srgb, var(--color-focus) 32%, transparent);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  padding-top: var(--space-3);
  padding-bottom: var(--space-8);
}

.page-contact .contact-hero__grid {
  display: grid;
  gap: var(--space-6);
}

.page-contact .contact-hero__lead .marker {
  margin-bottom: var(--space-2);
}

.page-contact .contact-hero h1 {
  margin: 0;
  max-width: 20ch;
  font-size: var(--text-3xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-contact .contact-hero__text {
  margin: var(--space-3) 0 0;
  max-width: 44ch;
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-contact .contact-hero__media .media {
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

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

/* ---------- 主渠道卡片 ---------- */
.page-contact .mail-card {
  margin-top: var(--space-4);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  color: var(--color-primary-ink);
  box-shadow: var(--shadow-2);
}

.page-contact .mail-card__label {
  margin: 0;
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  font-weight: 700;
  color: color-mix(in srgb, var(--color-primary-ink) 80%, transparent);
}

.page-contact .mail-card__address {
  margin: var(--space-2) 0 0;
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.01em;
  word-break: break-all;
}

.page-contact .mail-card__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-3);
  margin-top: var(--space-3);
}

.page-contact .mail-card__hint {
  font-size: var(--text-sm);
  color: color-mix(in srgb, var(--color-primary-ink) 84%, transparent);
}

/* ---------- 次级渠道 ---------- */
.page-contact .sub-channels {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.page-contact .sub-channel__head {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  margin: 0;
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-ink-soft);
}

.page-contact .sub-channel__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-accent);
}

.page-contact .sub-channel__value {
  margin: var(--space-1) 0 0;
  font-family: var(--font-mono);
  font-size: var(--text-base);
  line-height: 1.5;
  color: var(--color-ink);
  word-break: break-word;
}

.page-contact .sub-channels__note {
  margin: 0;
  max-width: 52ch;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
}

@media (min-width: 760px) {
  .page-contact .sub-channels {
    grid-template-columns: minmax(0, 0.6fr) minmax(0, 1fr);
    align-items: start;
  }
  .page-contact .sub-channels__note {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: center;
    gap: var(--space-8);
  }
  .page-contact .sub-channels {
    grid-template-columns: minmax(0, 0.5fr) minmax(0, 0.9fr) minmax(0, 1.4fr);
    align-items: baseline;
    margin-top: var(--space-8);
    padding-top: var(--space-4);
  }
  .page-contact .sub-channels__note {
    grid-column: auto;
  }
}

/* ---------- 问题分流 ---------- */
.page-contact .contact-routes__title,
.page-contact .contact-prep__title,
.page-contact .contact-beats__title,
.page-contact .contact-outro__title {
  margin: var(--space-2) 0 0;
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  max-width: 22ch;
}

.page-contact .contact-routes__lead,
.page-contact .contact-prep__lead,
.page-contact .contact-beats__lead {
  margin: var(--space-2) 0 0;
  max-width: 56ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-contact .contact-routes__grid {
  display: grid;
  gap: var(--space-6);
  margin-top: var(--space-4);
}

@media (min-width: 920px) {
  .page-contact .contact-routes__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.8fr);
    align-items: start;
    gap: var(--space-8);
    margin-top: var(--space-4);
  }
}

.page-contact .contact-routes__media .media {
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

/* 选项卡 */
.page-contact .route-switch {
  position: relative;
}

.page-contact .route-switch__input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  padding: 0;
  opacity: 0;
  pointer-events: none;
}

.page-contact .route-switch__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-bottom: var(--space-3);
}

.page-contact .route-switch__tab {
  display: inline-flex;
  align-items: center;
  padding: calc(var(--space-1) * 1.25) var(--space-3);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1.3;
  cursor: pointer;
  transition: background-color 200ms ease, border-color 200ms ease, color 200ms ease;
}

.page-contact .route-switch__tab:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.page-contact .route-switch__input:focus-visible ~ .route-switch__tabs .route-switch__tab {
  outline: calc(var(--border-thin) * 2) solid var(--color-focus);
  outline-offset: calc(var(--border-thin) * 2);
}

.page-contact .route-switch__input:focus-visible ~ .route-switch__tabs {
  border-radius: var(--radius-pill);
}

.page-contact #route-sub:checked ~ .route-switch__tabs .route-switch__tab:nth-child(1),
.page-contact #route-schedule:checked ~ .route-switch__tabs .route-switch__tab:nth-child(2),
.page-contact #route-partner:checked ~ .route-switch__tabs .route-switch__tab:nth-child(3) {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-ink);
  box-shadow: var(--shadow-1);
}

.page-contact .route-panel {
  display: none;
  padding: var(--space-4);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-1);
}

.page-contact #route-sub:checked ~ .route-switch__panels #panel-sub,
.page-contact #route-schedule:checked ~ .route-switch__panels #panel-schedule,
.page-contact #route-partner:checked ~ .route-switch__panels #panel-partner {
  display: block;
  animation: page-contact-panel 240ms ease both;
}

@keyframes page-contact-panel {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact #route-sub:checked ~ .route-switch__panels #panel-sub,
  .page-contact #route-schedule:checked ~ .route-switch__panels #panel-schedule,
  .page-contact #route-partner:checked ~ .route-switch__panels #panel-partner {
    animation: none;
  }
}

.page-contact .route-panel__kicker {
  margin: 0;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--color-accent);
}

.page-contact .route-panel__title {
  margin: var(--space-2) 0 0;
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  letter-spacing: -0.008em;
}

.page-contact .route-panel__text {
  margin: var(--space-2) 0 0;
  max-width: 60ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-contact .route-panel__link {
  margin: var(--space-3) 0 0;
  font-size: var(--text-base);
}

.page-contact .route-panel__link a {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
  border-bottom: var(--border-thin) solid color-mix(in srgb, var(--color-primary) 40%, transparent);
  padding-bottom: 2px;
}

.page-contact .route-panel__link a:hover {
  border-bottom-color: var(--color-primary);
}

/* ---------- 发信准备清单 ---------- */
.page-contact .prep-list {
  display: grid;
  gap: var(--space-2);
  margin-top: var(--space-4);
  max-width: 68ch;
}

.page-contact .prep-item {
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  overflow: hidden;
  transition: border-color 200ms ease;
}

.page-contact .prep-item[open] {
  border-color: color-mix(in srgb, var(--color-primary) 45%, var(--color-line));
  background: var(--color-surface);
  box-shadow: var(--shadow-1);
}

.page-contact .prep-item summary {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  list-style: none;
  cursor: pointer;
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-ink);
}

.page-contact .prep-item summary::-webkit-details-marker {
  display: none;
}

.page-contact .prep-item summary::after {
  content: "展开";
  margin-left: auto;
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  white-space: nowrap;
}

.page-contact .prep-item[open] summary::after {
  content: "收起";
  color: var(--color-primary);
}

.page-contact .prep-item summary:focus-visible {
  outline: calc(var(--border-thin) * 2) solid var(--color-focus);
  outline-offset: calc(var(--border-thin) * -2);
}

.page-contact .prep-item__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-primary);
}

.page-contact .prep-item__body {
  margin: 0;
  padding: 0 var(--space-4) var(--space-4);
  max-width: 62ch;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-contact .contact-prep__note {
  margin: var(--space-4) 0 0;
  max-width: 62ch;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
}

.page-contact .contact-prep__note a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: var(--border-thin) solid color-mix(in srgb, var(--color-primary) 40%, transparent);
}

.page-contact .contact-prep__note a:hover {
  border-bottom-color: var(--color-primary);
}

/* ---------- 响应节奏（深色区） ---------- */
.page-contact .contact-beats .marker__num {
  color: var(--color-contrast-accent);
}

.page-contact .contact-beats__title {
  color: var(--color-contrast-ink);
}

.page-contact .contact-beats__lead {
  color: color-mix(in srgb, var(--color-contrast-ink) 78%, transparent);
}

.page-contact .beat-list {
  display: grid;
  gap: 0;
  margin: var(--space-6) 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .beat {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-2) var(--space-4);
  padding-block: var(--space-4);
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-contact .beat:first-child {
  border-top: none;
  padding-top: 0;
}

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

.page-contact .beat__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--color-contrast-accent);
  padding-top: var(--space-2);
}

.page-contact .beat__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-contrast-accent);
  font-variant-numeric: tabular-nums;
}

.page-contact .beat__title {
  margin: var(--space-1) 0 0;
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  font-weight: var(--weight-heading);
  color: var(--color-contrast-ink);
}

.page-contact .beat__text {
  margin: var(--space-1) 0 0;
  max-width: 58ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 80%, transparent);
}

@media (min-width: 900px) {
  .page-contact .beat-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: var(--space-8);
  }
  .page-contact .beat:nth-child(2) {
    border-top: none;
    padding-top: 0;
  }
  .page-contact .beat:nth-child(odd) {
    padding-right: var(--space-4);
  }
}

/* ---------- 收尾出口 ---------- */
.page-contact .contact-outro {
  padding-bottom: var(--space-8);
}

.page-contact .contact-outro__inner {
  max-width: var(--measure);
}

.page-contact .contact-outro__text {
  margin: var(--space-3) 0 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-contact .contact-outro__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

/* ---------- 通用微调 ---------- */
.page-contact .marker {
  margin: 0;
}

.page-contact .contact-hero .marker,
.page-contact .contact-prep .marker,
.page-contact .contact-outro .marker {
  margin-bottom: var(--space-2);
}

@media (max-width: 719px) {
  .page-contact .mail-card {
    padding: var(--space-3);
  }
  .page-contact .mail-card__address {
    font-size: var(--text-base);
  }
  .page-contact .route-panel {
    padding: var(--space-3);
  }
  .page-contact .route-switch__tab {
    font-size: var(--text-xs);
  }
}