.page-contact {
  --contact-card-bg: var(--ink-800);
  --contact-sub-bg: var(--ink-850);
  --mail-fs: clamp(1.15rem, 5vw, 2.35rem);
  --tactical-line: rgba(53, 242, 208, 0.08);
  background: var(--ink-900);
  color: var(--ice);
}

.page-contact .section {
  padding-block: clamp(2.25rem, 6vw, 4.25rem);
}

.page-contact .contact-crumb-wrap {
  padding-block: 1.25rem 0;
}

.page-contact .crumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--fs-annot);
  color: var(--mist);
}

.page-contact .crumb-item a {
  color: var(--mist);
  text-decoration: none;
}

.page-contact .crumb-item + .crumb-item::before {
  content: "/";
  margin-right: 0.4rem;
  color: var(--ink-700);
}

.page-contact .crumb-current {
  color: var(--cyan);
}

/* 首屏 */
.page-contact .contact-hero {
  padding-block: clamp(1.5rem, 4vw, 3rem) clamp(2rem, 5vw, 3.5rem);
}

.page-contact .contact-hero-inner {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-contact .contact-hero-title {
  margin: 0.6rem 0 0;
  font-size: clamp(1.85rem, 5.6vw, 3.6rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--ice);
}

.page-contact .contact-hero-title .hl {
  display: block;
  color: var(--cyan);
}

.page-contact .contact-lead {
  margin: 1rem 0 0;
  max-width: 34rem;
  color: var(--mist);
  font-size: var(--fs-body);
  line-height: 1.75;
}

.page-contact .mail-card {
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
  padding: clamp(1.15rem, 3vw, 1.9rem);
  background: var(--contact-card-bg);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  border-radius: var(--radius);
  box-shadow: 0 22px 46px rgba(2, 10, 18, 0.55);
}

.page-contact .mail-label {
  margin: 0;
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-contact .mail-address {
  margin: 0.4rem 0 0.55rem;
  font-size: var(--mail-fs);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.15;
  color: var(--ice);
  overflow-wrap: anywhere;
}

.page-contact .mail-note {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .mail-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1rem;
}

.page-contact .copy-status {
  min-height: 1em;
  font-size: var(--fs-annot);
  color: var(--cyan);
}

.page-contact .contact-hero-side {
  display: grid;
  gap: 0.85rem;
  min-width: 0;
}

.page-contact .contact-hero-figure {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-contact .contact-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-contact .side-stack {
  display: grid;
  gap: 0.6rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .side-card {
  display: grid;
  gap: 0.3rem;
  padding: 0.85rem 1rem;
  background: var(--contact-sub-bg);
  border-left: 2px solid var(--ink-700);
}

.page-contact .side-card--help {
  border-left-color: var(--orange);
}

.page-contact .side-key {
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-contact .side-value {
  font-size: 1rem;
  line-height: 1.55;
  color: var(--ice);
  overflow-wrap: anywhere;
}

.page-contact .side-copy {
  justify-self: start;
  padding: 0.3rem 0.65rem;
  font: inherit;
  font-size: 0.75rem;
  color: var(--cyan);
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  cursor: pointer;
}

.page-contact .side-copy:hover,
.page-contact .side-copy:focus-visible {
  background: rgba(53, 242, 208, 0.12);
}

.page-contact .side-link {
  color: var(--orange);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  justify-self: start;
}

.page-contact .side-link:hover,
.page-contact .side-link:focus-visible {
  color: var(--amber);
}

/* 通道选择 */
.page-contact .channel-section {
  border-top: 1px solid var(--line);
}

.page-contact .channel-layout {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.75rem);
  min-width: 0;
}

.page-contact .channel-intro {
  min-width: 0;
}

.page-contact .channel-lead {
  margin: 0.85rem 0 1.4rem;
  max-width: 30rem;
  color: var(--mist);
  font-size: var(--fs-body);
  line-height: 1.75;
}

.page-contact .channel-figure {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-contact .channel-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-contact .channel-list {
  display: grid;
  gap: 0.75rem;
  min-width: 0;
}

.page-contact .channel-card {
  padding: 1.15rem 1.15rem 1.25rem;
  background: var(--contact-card-bg);
  border: 1px solid var(--line);
  border-top: 2px solid var(--ink-700);
  border-radius: var(--radius);
}

.page-contact .channel-card--mail {
  border-top-color: var(--cyan);
}

.page-contact .channel-card--phone {
  border-top-color: var(--grass);
}

.page-contact .channel-card--help {
  border-top-color: var(--orange);
}

.page-contact .channel-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-contact .channel-name {
  margin: 0.4rem 0 0.5rem;
  font-size: var(--fs-h3);
  font-weight: 800;
  color: var(--ice);
}

.page-contact .channel-desc {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .channel-foot {
  margin: 0.75rem 0 0;
  font-size: 0.8125rem;
  color: var(--cyan-soft);
}

.page-contact .channel-link {
  color: var(--orange);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-contact .channel-link:hover,
.page-contact .channel-link:focus-visible {
  color: var(--amber);
}

/* 两栏说明 */
.page-contact .contact-two-col {
  display: grid;
  gap: clamp(1.5rem, 3.5vw, 2.5rem);
  min-width: 0;
}

.page-contact .two-col-lead {
  min-width: 0;
}

.page-contact .two-col-lead p:not(.eyebrow) {
  margin: 0.9rem 0 0;
  color: var(--mist);
  font-size: var(--fs-body);
  line-height: 1.8;
}

.page-contact .two-col-lead .annot {
  font-size: var(--fs-annot);
  color: var(--mist);
  border-left: 2px solid var(--ink-700);
  padding-left: 0.75rem;
}

.page-contact .letter-card {
  padding: clamp(1.15rem, 3vw, 1.75rem);
  background: var(--contact-sub-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 16px 34px rgba(2, 10, 18, 0.45);
}

.page-contact .letter-title {
  margin: 0 0 0.9rem;
  font-size: 1rem;
  font-weight: 800;
  color: var(--amber);
  letter-spacing: 0.02em;
}

.page-contact .check-list {
  display: grid;
  gap: 0.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .check-list li {
  padding-top: 0.7rem;
  border-top: 1px dashed var(--line);
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .check-key {
  display: block;
  margin-bottom: 0.15rem;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-contact .route-card {
  padding: clamp(1.15rem, 3vw, 1.75rem);
  background: var(--contact-card-bg);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
}

.page-contact .route-title {
  margin: 0 0 1rem;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-contact .route-list {
  margin: 0;
  display: grid;
  gap: 0.9rem;
}

.page-contact .route-row {
  display: grid;
  gap: 0.25rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--line);
}

.page-contact .route-row:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-contact .route-row dt {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-contact .route-row dd {
  margin: 0;
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--ice);
  overflow-wrap: anywhere;
}

.page-contact .route-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  margin-top: 1.1rem;
}

.page-contact .route-actions .copy-btn {
  padding: 0.4rem 0.8rem;
  font: inherit;
  font-size: 0.8125rem;
  color: var(--cyan);
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  cursor: pointer;
}

.page-contact .route-actions .copy-btn:hover,
.page-contact .route-actions .copy-btn:focus-visible {
  background: rgba(53, 242, 208, 0.12);
}

/* 帮助中心第三项 */
.page-contact .help-band {
  padding: clamp(1.3rem, 3.5vw, 2.5rem);
  background:
    repeating-linear-gradient(0deg, var(--tactical-line) 0 1px, transparent 1px 44px),
    repeating-linear-gradient(90deg, var(--tactical-line) 0 1px, transparent 1px 44px),
    var(--ink-850);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius);
}

.page-contact .help-head .section-title {
  margin: 0.7rem 0 0.75rem;
}

.page-contact .help-lead {
  margin: 0;
  max-width: 46rem;
  color: var(--mist);
  font-size: var(--fs-body);
  line-height: 1.8;
}

.page-contact .help-steps {
  display: grid;
  gap: 0.75rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.page-contact .help-steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.75rem;
  align-items: start;
  padding: 0.8rem 0.9rem;
  background: rgba(6, 24, 38, 0.6);
  border: 1px solid var(--line);
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--ice);
}

.page-contact .step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.6rem;
  height: 1.6rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--on-accent);
  background: var(--cyan);
  border-radius: var(--radius);
}

.page-contact .help-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.9rem;
  margin-top: 1.4rem;
}

.page-contact .help-note {
  margin: 0;
  font-size: var(--fs-annot);
  color: var(--mist);
}

/* 合作与反馈 */
.page-contact .feedback-head .lead {
  margin: 0.75rem 0 0;
  max-width: 42rem;
  color: var(--mist);
  font-size: var(--fs-body);
  line-height: 1.75;
}

.page-contact .feedback-stack {
  display: grid;
  gap: 1rem;
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
}

.page-contact .feedback-card {
  padding: 1.2rem 1.2rem 1.35rem;
  background: var(--contact-sub-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 14px 30px rgba(2, 10, 18, 0.5);
}

.page-contact .feedback-tag {
  display: inline-block;
  margin: 0;
  padding: 0.2rem 0.5rem;
  font-size: var(--fs-tag);
  letter-spacing: 0.1em;
  color: var(--ink-900);
  background: var(--amber);
  border-radius: var(--radius);
}

.page-contact .feedback-card:nth-child(2) .feedback-tag {
  background: var(--grass);
}

.page-contact .feedback-card:nth-child(3) .feedback-tag {
  background: var(--cyan);
}

.page-contact .feedback-title {
  margin: 0.75rem 0 0.55rem;
  font-size: 1.0625rem;
  font-weight: 800;
  color: var(--ice);
}

.page-contact .feedback-body {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--mist);
}

/* 来访提示 */
.page-contact .visit-panel {
  padding: clamp(1.3rem, 3.5vw, 2.25rem);
  background: var(--contact-card-bg);
  border: 1px solid var(--line);
  border-top: 2px solid var(--cyan);
  border-radius: var(--radius);
}

.page-contact .visit-grid {
  display: grid;
  gap: 1rem;
  margin-top: 1.25rem;
}

.page-contact .visit-item {
  padding-left: 0.85rem;
  border-left: 2px solid var(--ink-700);
}

.page-contact .visit-key {
  margin: 0 0 0.35rem;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--cyan-soft);
}

.page-contact .visit-text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--mist);
}

/* 继续浏览 */
.page-contact .contact-next {
  padding-bottom: clamp(2.5rem, 6vw, 4.5rem);
}

.page-contact .next-links {
  display: grid;
  gap: 0.75rem;
  margin-top: 1rem;
}

.page-contact .next-link {
  display: grid;
  gap: 0.3rem;
  padding: 1rem 1.1rem;
  text-decoration: none;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.page-contact .next-link:hover,
.page-contact .next-link:focus-visible {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.page-contact .next-name {
  font-size: 1rem;
  font-weight: 800;
  color: var(--cyan);
}

.page-contact .next-desc {
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--mist);
}

/* 桌面栅格 */
@media (min-width: 48rem) {
  .page-contact .contact-hero-inner {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: start;
  }

  .page-contact .channel-layout {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    align-items: start;
  }

  .page-contact .channel-list {
    gap: 0.85rem;
  }

  .page-contact .contact-two-col {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .help-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .help-steps li {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }

  .page-contact .feedback-stack {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-contact .feedback-card:nth-child(2) {
    transform: translateY(0.85rem);
  }

  .page-contact .feedback-card:nth-child(3) {
    transform: translateY(1.7rem);
  }

  .page-contact .visit-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .next-links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 64rem) {
  .page-contact .channel-card {
    padding: 1.35rem 1.5rem 1.45rem;
  }

  .page-contact .contact-hero-side {
    padding-top: 0.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .next-link {
    transition: none;
  }

  .page-contact .feedback-card:nth-child(2),
  .page-contact .feedback-card:nth-child(3) {
    transform: none;
  }
}