.page-faq {
  --faq-index-w: 216px;
  --faq-gap: clamp(24px, 3.6vw, 56px);
  --faq-tint: rgba(34, 217, 206, 0.14);
  --faq-orange-tint: rgba(255, 106, 31, 0.08);
  background-color: var(--ink);
  color: var(--silver);
}

.page-faq .lede {
  max-width: 34em;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding-top: calc(var(--header-h) + clamp(40px, 8vw, 104px));
  padding-bottom: clamp(52px, 8vw, 104px);
  border-bottom: 2px solid var(--edge);
  background-image:
    radial-gradient(118% 96% at 88% 4%, var(--faq-tint) 0%, rgba(10, 23, 48, 0) 62%),
    linear-gradient(166deg, var(--ink) 0%, #0C1B37 62%, #122445 100%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(42, 59, 94, 0.5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(42, 59, 94, 0.5) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.42;
  pointer-events: none;
  z-index: 0;
}

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

.page-faq .faq-hero .breadcrumb {
  margin-bottom: clamp(20px, 3.4vw, 40px);
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
  min-width: 0;
}

.page-faq .faq-hero-copy {
  min-width: 0;
}

.page-faq .faq-hero-copy .field-label {
  color: var(--cyan);
  margin: 0 0 14px;
}

.page-faq .faq-hero h1 {
  margin: 0 0 clamp(14px, 2vw, 22px);
  color: var(--white);
}

.page-faq .faq-hero-readouts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  margin-top: clamp(24px, 3.4vw, 42px);
  background-color: var(--edge);
  border: 2px solid var(--edge);
}

.page-faq .faq-hero-readouts .readout {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px;
  background-color: #0B1933;
}

.page-faq .faq-hero-readouts .readout-value {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  line-height: 1;
  color: var(--white);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-hero-readouts .readout-label {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--graphite);
}

.page-faq .faq-hero-figure {
  min-width: 0;
  position: relative;
}

.page-faq .faq-hero-figure .figure {
  margin: 0;
}

.page-faq .faq-hero-figure .figure-frame {
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-hero-figure .figure-cap {
  display: block;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--graphite);
}

/* ---------- 路径选择 ---------- */

.page-faq .faq-routes {
  border-bottom: 2px solid var(--edge);
}

.page-faq .routes-head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(24px, 3.4vw, 40px);
}

.page-faq .routes-head h2 {
  margin: 0;
  color: var(--white);
}

.page-faq .routes-head .meta-note {
  max-width: 56ch;
}

.page-faq .route-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(14px, 2vw, 22px);
  grid-template-columns: repeat(auto-fit, minmax(226px, 1fr));
}

.page-faq .route-card {
  display: flex;
  min-width: 0;
}

.page-faq .route-link {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
  padding: clamp(18px, 2.4vw, 26px);
  background-color: var(--ink-2);
  border: 2px solid var(--edge);
  color: inherit;
  text-decoration: none;
  transition:
    transform var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.page-faq .route-link:hover,
.page-faq .route-link:focus-visible {
  transform: translate(-3px, -3px);
  border-color: var(--cyan);
  box-shadow: var(--shadow-hard);
}

.page-faq .route-no {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-faq .route-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.06rem, 2.2vw, 1.24rem);
  font-weight: 700;
  line-height: 1.25;
  color: var(--white);
}

.page-faq .route-desc {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--silver);
}

.page-faq .route-go {
  margin-top: auto;
  padding-top: 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-faq .route-go::after {
  content: " →";
}

/* ---------- 分栏问答 ---------- */

.page-faq .faq-workbench {
  padding-top: clamp(48px, 7vw, 92px);
}

.page-faq .faq-layout {
  display: grid;
  gap: var(--faq-gap);
  min-width: 0;
}

.page-faq .faq-index {
  min-width: 0;
}

.page-faq .faq-index .section-index-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--graphite);
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 2px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index-link {
  display: grid;
  grid-template-columns: auto auto;
  gap: 10px;
  align-items: baseline;
  white-space: nowrap;
  padding: 10px 14px;
  border-left: 3px solid transparent;
  color: var(--graphite);
  text-decoration: none;
  font-size: 0.9rem;
  transition:
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.page-faq .faq-index-link:hover {
  color: var(--silver);
  background-color: rgba(20, 40, 76, 0.62);
}

.page-faq .faq-index-link.is-current {
  color: var(--white);
  border-left-color: var(--orange);
  background-color: var(--faq-orange-tint);
}

.page-faq .faq-index-num {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .faq-index-link.is-current .faq-index-num {
  color: var(--orange);
}

.page-faq .faq-groups {
  display: flex;
  flex-direction: column;
  gap: clamp(34px, 5vw, 72px);
  min-width: 0;
}

.page-faq .dossier {
  scroll-margin-top: calc(var(--header-h) + 28px);
  background-color: rgba(20, 40, 76, 0.32);
  border: 2px solid var(--edge);
}

.page-faq .dossier-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  padding: 16px clamp(16px, 2.4vw, 26px);
  background-color: rgba(20, 40, 76, 0.72);
  border-bottom: 2px solid var(--edge);
}

.page-faq .dossier-no {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-faq .dossier-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.14rem, 2.6vw, 1.42rem);
  font-weight: 700;
  color: var(--white);
}

.page-faq .dossier-status {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--graphite);
}

.page-faq .dossier-body {
  padding: 4px clamp(16px, 2.4vw, 26px) clamp(18px, 2.6vw, 28px);
}

.page-faq .qa-list {
  display: flex;
  flex-direction: column;
}

.page-faq .qa-item {
  border-bottom: 2px solid var(--edge);
}

.page-faq .qa-item:last-child {
  border-bottom: none;
}

.page-faq .qa-summary {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: start;
  padding: 16px 4px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: clamp(1rem, 2.2vw, 1.18rem);
  font-weight: 600;
  line-height: 1.35;
  color: var(--white);
  transition: color var(--dur) var(--ease);
}

.page-faq .qa-summary::-webkit-details-marker {
  display: none;
}

.page-faq .qa-summary:hover {
  color: var(--cyan);
}

.page-faq .qa-summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1.4;
  color: var(--cyan);
}

.page-faq .qa-item[open] > .qa-summary::after {
  content: "\2212";
  color: var(--orange);
}

.page-faq .qa-num {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--orange);
}

.page-faq .qa-body {
  padding: 0 4px 20px;
  display: grid;
  gap: 10px;
}

.page-faq .qa-field {
  display: grid;
  grid-template-columns: 2.9rem 1fr;
  gap: 12px;
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--silver);
}

.page-faq .qa-field .field-label {
  color: var(--cyan);
  padding-top: 2px;
}

.page-faq .qa-field .btn-line {
  color: var(--orange);
}

.page-faq .spec-banner {
  margin: clamp(16px, 2.6vw, 26px) 0 clamp(20px, 3vw, 30px);
}

.page-faq .spec-banner .figure-cap {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--graphite);
}

/* ---------- 口径对照 ---------- */

.page-faq .faq-scope {
  padding-top: clamp(52px, 7vw, 96px);
  padding-bottom: clamp(52px, 7vw, 96px);
  border-top: 2px solid var(--edge);
  border-bottom: 2px solid var(--edge);
  background-color: rgba(20, 40, 76, 0.28);
}

.page-faq .scope-head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(22px, 3.2vw, 36px);
}

.page-faq .scope-head .field-label {
  color: var(--orange);
}

.page-faq .scope-head h2 {
  margin: 0;
  color: var(--white);
}

.page-faq .scope-head .meta-note {
  max-width: 58ch;
}

.page-faq .scope-table th {
  position: sticky;
  top: 0;
  background-color: var(--ink-2);
  color: var(--white);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.page-faq .scope-table tbody tr {
  transition: background-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .scope-table tbody tr:hover {
  background-color: rgba(34, 217, 206, 0.08);
  box-shadow: inset 3px 0 0 var(--orange);
}

.page-faq .scope-table td:first-child {
  color: var(--white);
  font-weight: 600;
}

.page-faq .scope-tail {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  max-width: 68ch;
}

.page-faq .scope-tail .btn-line {
  color: var(--cyan);
}

/* ---------- 提交 ---------- */

.page-faq .submit-block {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  padding: clamp(22px, 3.2vw, 38px);
  border: 2px solid var(--cyan);
  box-shadow: var(--shadow-hard);
  background-image: linear-gradient(136deg, rgba(34, 217, 206, 0.11) 0%, rgba(10, 23, 48, 0.94) 46%, rgba(10, 23, 48, 1) 100%);
}

.page-faq .submit-copy .field-label {
  color: var(--orange);
  margin: 0 0 10px;
}

.page-faq .submit-copy h2 {
  margin: 0 0 16px;
  color: var(--white);
}

.page-faq .submit-list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 10px;
  border-top: 2px solid var(--edge);
  padding-top: 16px;
}

.page-faq .submit-list li {
  display: grid;
  grid-template-columns: 2.4rem 1fr;
  gap: 10px;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--silver);
}

.page-faq .submit-no {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
  padding-top: 3px;
}

.page-faq .submit-note {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.72;
  color: var(--graphite);
}

.page-faq .submit-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-start;
}

.page-faq .submit-actions .btn {
  width: 100%;
  text-align: center;
}

.page-faq .submit-meta {
  margin: 4px 0 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--graphite);
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-faq .faq-hero-readouts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .submit-actions .btn {
    width: auto;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }

  .page-faq .faq-index-list {
    flex-direction: column;
    overflow-x: visible;
  }

  .page-faq .faq-index-link {
    white-space: normal;
  }

  .page-faq .submit-block {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.9fr);
    align-items: start;
  }
}

@media (min-width: 1180px) {
  .page-faq {
    --faq-index-w: 248px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .route-link,
  .page-faq .faq-index-link,
  .page-faq .scope-table tbody tr {
    transition: none;
  }

  .page-faq .route-link:hover {
    transform: none;
  }
}