.page-contact {
  background: var(--ink-900);
  color: var(--paper);
  --contact-gap: clamp(20px, 3.4vw, 40px);
}

.page-contact .section {
  padding: clamp(52px, 7vw, 92px) 0;
}

.page-contact .contact-crumb-wrap {
  padding-top: clamp(18px, 3vw, 30px);
}

.page-contact .contact-crumb-wrap .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-contact .contact-crumb-wrap .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: 8px;
  color: var(--mist-a);
}

.page-contact .breadcrumb-link {
  color: var(--slate);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-contact .breadcrumb-link:hover,
.page-contact .breadcrumb-link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-contact .breadcrumb-link[aria-current="page"] {
  color: var(--amber);
  border-bottom-color: var(--amber-line);
}

/* ---------- 首屏路径板 ---------- */

.page-contact .contact-hero {
  position: relative;
  background: var(--indigo-jewel);
  border-top: 2px solid var(--cyan-line);
  border-bottom: 2px solid var(--line-strong);
  overflow: hidden;
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  top: -40%;
  right: -12%;
  width: 42%;
  height: 180%;
  background: rgba(63, 214, 196, 0.06);
  transform: skewX(-14deg);
  pointer-events: none;
}

.page-contact .contact-hero .container {
  position: relative;
  z-index: 1;
}

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

.page-contact .hero-copy .eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-contact .hero-copy h1 {
  margin: 0;
  max-width: 16ch;
  font-family: var(--font-sans);
  font-size: clamp(32px, 6vw, 56px);
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-contact .hero-copy .lead {
  margin: 20px 0 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist-b);
}

.page-contact .hero-visual img {
  display: block;
  width: 100%;
  height: auto;
  border: 2px solid var(--cyan-line);
  box-shadow: var(--shadow);
}

.page-contact .channel-list {
  margin: clamp(30px, 5vw, 52px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--line-strong);
}

.page-contact .channel-row {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 0 14px;
  padding: 20px 0;
  border-bottom: 2px solid var(--line);
  transition: border-color 180ms var(--ease);
}

.page-contact .channel-row:hover,
.page-contact .channel-row:focus-within {
  border-bottom-color: var(--cyan);
}

.page-contact .channel-index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--amber);
  padding-top: 4px;
}

.page-contact .channel-body {
  display: flex;
  flex-direction: column;
  gap: 7px;
  min-width: 0;
}

.page-contact .channel-label {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--slate);
}

.page-contact .channel-value {
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.4vw, 20px);
  line-height: 1.3;
  color: var(--cyan);
  letter-spacing: 0.01em;
  overflow-wrap: anywhere;
  border-bottom: 2px solid var(--cyan-line);
  padding-bottom: 3px;
  align-self: flex-start;
}

.page-contact .channel-note {
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist-b);
}

/* ---------- 纸白准备板 ---------- */

.page-contact .prep-section {
  background: var(--paper);
  color: var(--graphite);
  border-bottom: 2px solid var(--line-strong);
}

.page-contact .prep-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 48px);
}

.page-contact .prep-main .eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--wine-jewel);
}

.page-contact .prep-main h2,
.page-contact .topics-head h2,
.page-contact .rollout-copy h2,
.page-contact .next-panel h2 {
  margin: 0;
  font-size: clamp(26px, 4.4vw, 40px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.015em;
}

.page-contact .prep-main .prose {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.78;
  color: var(--graphite);
}

.page-contact .prep-main .num-list {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: prep;
  max-width: 36em;
}

.page-contact .prep-main .num-list li {
  position: relative;
  counter-increment: prep;
  padding: 0 0 0 46px;
  margin-bottom: 14px;
  font-size: 15px;
  line-height: 1.75;
  color: #2b3339;
}

.page-contact .prep-main .num-list li::before {
  content: counter(prep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--wine-jewel);
  border-bottom: 2px solid var(--amber);
  padding-bottom: 2px;
}

.page-contact .prep-main .hint {
  margin: 14px 0 0;
  padding-left: 14px;
  border-left: 3px solid var(--amber);
  font-size: 14px;
  line-height: 1.7;
  color: #4a565f;
  max-width: 36em;
}

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

.page-contact .prep-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 2px solid var(--graphite);
  box-shadow: var(--shadow);
  background: var(--navy-800);
}

.page-contact .prep-figure figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  line-height: 1.6;
  color: #5c6970;
}

/* ---------- 咨询方向 ---------- */

.page-contact .topics-section {
  background: var(--ink-900);
}

.page-contact .topics-head {
  max-width: 44em;
  margin-bottom: clamp(26px, 4vw, 40px);
}

.page-contact .topics-head .eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-contact .topics-head h2 {
  color: var(--paper);
}

.page-contact .topics-head .lead {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--slate);
}

.page-contact .topic-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
  background: var(--line-strong);
  border: 2px solid var(--line-strong);
  box-shadow: var(--shadow);
}

.page-contact .topic-card {
  background: var(--navy-800);
  padding: 20px;
  transition: background 180ms var(--ease);
}

.page-contact .topic-card[open] {
  background: var(--navy-700);
}

.page-contact .topic-card summary {
  display: flex;
  align-items: baseline;
  gap: 10px;
  cursor: pointer;
  list-style: none;
  outline-offset: 4px;
}

.page-contact .topic-card summary::-webkit-details-marker {
  display: none;
}

.page-contact .topic-card summary:focus-visible {
  outline: 2px solid var(--cyan);
}

.page-contact .topic-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-contact .topic-name {
  flex: 1 1 auto;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-contact .topic-mark {
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--cyan);
}

.page-contact .topic-mark::before {
  content: "+";
}

.page-contact .topic-card[open] .topic-mark::before {
  content: "\2212";
}

.page-contact .topic-body {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.page-contact .topic-body p {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist-b);
}

.page-contact .topic-body .topic-tip {
  margin: 0;
  padding-left: 12px;
  border-left: 3px solid var(--amber);
  font-size: 13px;
  color: var(--slate);
}

/* ---------- 批量上线 ---------- */

.page-contact .rollout-section {
  background: var(--teal-jewel);
  border-top: 2px solid var(--line-strong);
  border-bottom: 2px solid var(--line-strong);
}

.page-contact .rollout-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4.5vw, 52px);
}

.page-contact .rollout-copy .eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--amber);
}

.page-contact .rollout-copy h2 {
  color: var(--paper);
  max-width: 18ch;
}

.page-contact .rollout-copy .prose {
  margin: 18px 0 0;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist-b);
}

.page-contact .rollout-facts {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-contact .fact-block {
  position: relative;
  padding: 16px 18px 16px 20px;
  background: rgba(8, 19, 31, 0.55);
  border: 2px solid var(--line-strong);
  border-left: 3px solid var(--cyan);
}

.page-contact .fact-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--amber);
  margin-bottom: 6px;
}

.page-contact .fact-block p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist-b);
}

/* ---------- 尾板 ---------- */

.page-contact .next-section {
  background: var(--indigo-jewel);
}

.page-contact .next-panel {
  border: 2px solid var(--line-strong);
  border-top: 3px solid var(--cyan);
  background: rgba(8, 19, 31, 0.42);
  padding: clamp(24px, 4vw, 40px);
  box-shadow: var(--shadow);
}

.page-contact .next-panel .eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-contact .next-panel h2 {
  color: var(--paper);
  max-width: 20ch;
}

.page-contact .next-panel .lead {
  margin: 16px 0 0;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist-b);
}

.page-contact .next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-contact .next-links .btn {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 20px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border: 2px solid var(--line-strong);
  background: transparent;
  color: var(--paper);
  box-shadow: var(--shadow-sm);
  transition: transform 160ms var(--ease), border-color 160ms var(--ease),
    background 160ms var(--ease), color 160ms var(--ease);
}

.page-contact .next-links .btn:hover,
.page-contact .next-links .btn:focus-visible {
  transform: translate(-1px, -1px);
  border-color: var(--cyan);
  color: var(--cyan);
}

.page-contact .next-links .btn--primary {
  border-color: var(--cyan);
  background: rgba(63, 214, 196, 0.14);
  color: var(--cyan);
}

.page-contact .next-links .btn--primary:hover,
.page-contact .next-links .btn--primary:focus-visible {
  background: var(--cyan);
  color: var(--ink-900);
}

.page-contact .next-panel .hint {
  margin: 20px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

.page-contact .inline-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-line);
}

.page-contact .inline-link:hover,
.page-contact .inline-link:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-contact .topic-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .rollout-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-contact .hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 5vw, 64px);
  }

  .page-contact .channel-row {
    grid-template-columns: 56px minmax(0, 1fr);
    gap: 0 20px;
    padding: 24px 0;
  }

  .page-contact .channel-body {
    display: grid;
    grid-template-columns: 120px minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: baseline;
    gap: 10px 22px;
  }

  .page-contact .prep-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }

  .page-contact .rollout-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }
}

@media (min-width: 1100px) {
  .page-contact .topic-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .rollout-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .breadcrumb-link,
  .page-contact .channel-row,
  .page-contact .topic-card,
  .page-contact .next-links .btn {
    transition: none;
  }

  .page-contact .next-links .btn:hover,
  .page-contact .next-links .btn:focus-visible {
    transform: none;
  }
}