.page-contact {
  --contact-glass: color-mix(in srgb, var(--color-surface) 88%, transparent);
  --contact-glass-line: color-mix(in srgb, var(--color-surface) 62%, var(--color-primary-soft));
  --contact-tint: color-mix(in srgb, var(--color-surface) 78%, var(--color-primary-soft));
  --contact-h1: clamp(var(--text-2xl), 5.6vw, var(--text-4xl));
  --contact-ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

/* ---------- 面包屑 ---------- */
.page-contact .breadcrumb {
  padding: var(--space-3) 0 0;
}
.page-contact .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}
.page-contact .breadcrumb li {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.page-contact .breadcrumb li + li::before {
  content: "/";
  color: var(--color-line);
}
.page-contact .breadcrumb a {
  color: var(--color-ink-soft);
  text-decoration: none;
  border-bottom: var(--border-thin) solid transparent;
  transition: color 200ms var(--contact-ease), border-color 200ms var(--contact-ease);
}
.page-contact .breadcrumb a:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}
.page-contact .breadcrumb [aria-current="page"] {
  color: var(--color-accent);
}

/* ---------- 首屏：渠道面板叠在图片底上 ---------- */
.page-contact .contact-deck-section {
  position: relative;
  overflow: hidden;
  padding-top: var(--space-6);
  padding-bottom: var(--section-y);
}
.page-contact .deck-canvas {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.page-contact .deck-canvas img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  object-position: center 30%;
}
.page-contact .deck-canvas__scrim {
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
}
.page-contact .deck-inner {
  position: relative;
  z-index: 1;
}

.page-contact .deck-head {
  max-width: 46rem;
}
.page-contact .deck-tag {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-contrast-accent);
}
.page-contact .deck-head h1 {
  margin: 0 0 var(--space-3);
  font-size: var(--contact-h1);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
  overflow-wrap: break-word;
}
.page-contact .deck-head .lead {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 84%, transparent);
}

.page-contact .deck-subhead {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-1) var(--space-3);
  margin: var(--space-6) 0 var(--space-3);
}
.page-contact .deck-subhead h2 {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-contrast-ink);
}
.page-contact .deck-hours {
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 4px var(--space-2);
  border-radius: var(--radius-sm);
  border: var(--border-thin) solid var(--color-contrast-line);
  background: color-mix(in srgb, var(--color-contrast-surface) 62%, transparent);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-contrast-ink);
}
.page-contact .deck-hours__k {
  color: var(--color-contrast-accent);
}

/* ---------- 渠道面板 ---------- */
.page-contact .channel-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-2);
}
.page-contact .channel {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-3);
  min-width: 0;
  border: var(--border-thin) solid var(--contact-glass-line);
  border-radius: var(--radius-lg);
  background: var(--contact-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--shadow-1);
  transition: transform 240ms var(--contact-ease), box-shadow 240ms var(--contact-ease);
}
.page-contact .channel:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
}
.page-contact .channel__tag {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
}
.page-contact .channel__title {
  margin: 0;
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}
.page-contact .channel__value {
  margin: 0;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  background: var(--color-surface-deep);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-accent);
  overflow-wrap: anywhere;
  word-break: break-word;
}
.page-contact .channel__use {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-contact .channel__more {
  margin-top: auto;
  padding-top: var(--space-2);
  background-image: repeating-linear-gradient(
    90deg,
    var(--color-line) 0 6px,
    transparent 6px 12px
  );
  background-repeat: no-repeat;
  background-position: top left;
  background-size: 100% var(--border-thin);
}
.page-contact .channel__more summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-1);
  cursor: pointer;
  list-style: none;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
}
.page-contact .channel__more summary::-webkit-details-marker {
  display: none;
}
.page-contact .channel__more summary::after {
  content: "＋";
  font-family: var(--font-mono);
  font-size: var(--text-base);
  line-height: 1;
  color: var(--color-accent);
}
.page-contact .channel__more[open] summary::after {
  content: "－";
}
.page-contact .channel__more summary:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}
.page-contact .channel__facts {
  margin: var(--space-2) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--space-1);
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
}
.page-contact .channel__facts li {
  position: relative;
  padding-left: var(--space-2);
}
.page-contact .channel__facts li::before {
  content: "·";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}

/* ---------- 通用小标题 ---------- */
.page-contact .section__index {
  margin: 0 0 var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  color: var(--color-ink-muted);
}
.page-contact .band-head {
  max-width: var(--measure);
  margin-bottom: var(--space-6);
}
.page-contact .band-head h2,
.page-contact .contact-rhythm h2,
.page-contact .contact-return h2 {
  margin: 0 0 var(--space-2);
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}
.page-contact .band-head .lead,
.page-contact .return-lead {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 四类问题：编号行 ---------- */
.page-contact .route-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--space-2);
}
.page-contact .route-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-1) var(--space-3);
  padding: var(--space-3);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--contact-tint);
  transition: background 220ms var(--contact-ease), border-color 220ms var(--contact-ease);
}
.page-contact .route-row:hover {
  border-color: color-mix(in srgb, var(--color-primary) 42%, var(--color-line));
  background: color-mix(in srgb, var(--color-surface) 58%, var(--color-highlight));
}
.page-contact .route-row__no {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.04em;
  color: color-mix(in srgb, var(--color-accent) 72%, transparent);
}
.page-contact .route-row__copy {
  min-width: 0;
}
.page-contact .route-row__title {
  margin: 0 0 var(--space-1);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}
.page-contact .route-row__desc {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}
.page-contact .route-row__meta {
  grid-column: 2;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-1) var(--space-2);
  margin: 0;
}
.page-contact .route-row__label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}
.page-contact .route-row__value {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
}
.page-contact .route-row__meta:nth-of-type(3) .route-row__value {
  color: var(--color-accent);
}

/* ---------- 响应节奏 ---------- */
.page-contact .contact-rhythm .rhythm-copy p {
  margin: 0 0 var(--space-2);
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}
.page-contact .scale {
  margin-top: var(--space-4);
  padding: var(--space-3);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-surface-alt);
}
.page-contact .scale__track {
  display: block;
  height: 12px;
  border-radius: var(--radius-pill);
  background-color: var(--color-primary);
  background-image: repeating-linear-gradient(
    90deg,
    color-mix(in srgb, var(--color-primary-ink) 55%, transparent) 0 var(--border-thin),
    transparent var(--border-thin) calc(100% / 9)
  );
}
.page-contact .scale__marks {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-1) var(--space-2);
  margin: var(--space-2) 0 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}
.page-contact .scale__marks li:first-child,
.page-contact .scale__marks li:last-child {
  color: var(--color-ink);
}
.page-contact .rhythm-media {
  margin-top: var(--space-6);
}
.page-contact .rhythm-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  border: var(--border-thin) solid var(--color-line);
}
.page-contact .rhythm-media__caption {
  margin: var(--space-2) 0 0;
  font-size: var(--text-xs);
  line-height: 1.7;
  color: var(--color-ink-muted);
}

/* ---------- 提问信息清单 ---------- */
.page-contact .brief-panel {
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-surface-alt);
  box-shadow: var(--shadow-1);
  overflow: hidden;
}
.page-contact .brief-panel__lead {
  padding: var(--space-4) var(--space-3) var(--space-3);
  background: color-mix(in srgb, var(--color-primary-soft) 55%, var(--color-surface));
  border-bottom: var(--border-thin) solid var(--color-line);
}
.page-contact .brief-panel__lead h2 {
  margin: 0 0 var(--space-2);
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}
.page-contact .brief-panel__lead p {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}
.page-contact .brief-fields {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-contact .brief-field {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-2);
  padding: var(--space-3);
}
.page-contact .brief-field + .brief-field {
  background-image: repeating-linear-gradient(
    90deg,
    var(--color-line) 0 6px,
    transparent 6px 12px
  );
  background-repeat: no-repeat;
  background-position: top left;
  background-size: 100% var(--border-thin);
}
.page-contact .brief-field__no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius-sm);
  border: var(--border-thin) solid var(--color-accent);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
}
.page-contact .brief-field__body h3 {
  margin: 0 0 var(--space-1);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}
.page-contact .brief-field__body p {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 渠道边界：深色反相区 ---------- */
.page-contact .limits-panel {
  padding: var(--space-4) var(--space-3);
  border-radius: var(--radius-lg);
  border: var(--border-thin) solid var(--color-contrast-line);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}
.page-contact .limits-panel__index {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  color: var(--color-contrast-accent);
}
.page-contact .limits-panel h2 {
  margin: 0 0 var(--space-2);
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-contrast-ink);
}
.page-contact .limits-panel__lead {
  margin: 0 0 var(--space-4);
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 82%, transparent);
}
.page-contact .limits-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--space-2);
}
.page-contact .limits-list li {
  position: relative;
  padding-left: var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 90%, transparent);
}
.page-contact .limits-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: var(--space-2);
  height: var(--border-thin);
  background: var(--color-contrast-accent);
}
.page-contact .limits-note {
  margin: var(--space-4) 0 0;
  padding-top: var(--space-3);
  background-image: repeating-linear-gradient(
    90deg,
    var(--color-contrast-line) 0 6px,
    transparent 6px 12px
  );
  background-repeat: no-repeat;
  background-position: top left;
  background-size: 100% var(--border-thin);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 74%, transparent);
}

/* ---------- 回到入口 ---------- */
.page-contact .return-lead {
  margin-bottom: var(--space-4);
}
.page-contact .return-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-2);
}
.page-contact .return-list a {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  height: 100%;
  padding: var(--space-3);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-surface-alt);
  text-decoration: none;
  color: var(--color-ink);
  transition: transform 220ms var(--contact-ease), box-shadow 220ms var(--contact-ease),
    border-color 220ms var(--contact-ease);
}
.page-contact .return-list a:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-1);
  border-color: var(--color-primary);
}
.page-contact .return-list a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}
.page-contact .return-list__k {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-accent);
}
.page-contact .return-list__t {
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
}
.page-contact .return-list__d {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 响应式 ---------- */
@media (min-width: 680px) {
  .page-contact .contact-deck-section {
    padding-bottom: var(--section-y-lg);
  }
  .page-contact .brief-panel__lead,
  .page-contact .brief-field {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }
  .page-contact .limits-panel {
    padding: var(--space-6) var(--space-4);
  }
  .page-contact .return-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-contact .channel-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-3);
  }
  .page-contact .channel {
    padding: var(--space-4);
  }
  .page-contact .route-row {
    grid-template-columns: auto minmax(0, 1fr) minmax(0, 11rem) minmax(0, 12rem);
    align-items: start;
    gap: var(--space-3);
    padding: var(--space-4);
  }
  .page-contact .route-row__meta {
    grid-column: auto;
    flex-direction: column;
    gap: var(--space-1);
    padding-top: 2px;
  }
  .page-contact .rhythm-media {
    margin-top: 0;
  }
  .page-contact .return-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1100px) {
  .page-contact .channel-grid {
    gap: var(--space-4);
  }
  .page-contact .deck-head {
    max-width: 52rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel,
  .page-contact .route-row,
  .page-contact .return-list a {
    transition: none;
  }
  .page-contact .channel:hover,
  .page-contact .return-list a:hover {
    transform: none;
  }
}