.page-faq {
  --faq-gap: 2px;
  --faq-block: 46px;
  --faq-pad-y: 16px;
  background: var(--ink-950);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--step-15);
  line-height: 1.75;
  overflow-x: clip;
  padding-top: var(--faq-pad-y);
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

.page-faq .container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

@media (min-width: 768px) {
  .page-faq .container {
    padding-left: 32px;
    padding-right: 32px;
  }
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs {
  padding: 18px 0 0;
  font-size: var(--step-13);
}

.page-faq .breadcrumbs-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  color: var(--muted);
}

.page-faq .breadcrumbs-item::after {
  content: "/";
  margin-left: 8px;
  color: var(--line);
}

.page-faq .breadcrumbs-item:last-child::after {
  content: "";
  margin: 0;
}

.page-faq .breadcrumbs-link {
  color: var(--cyan);
  text-decoration: none;
}

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  margin-top: 20px;
  padding: 40px 0 34px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 8% 0%, rgba(23, 185, 120, 0.22), rgba(6, 20, 38, 0) 62%),
    linear-gradient(180deg, rgba(10, 43, 34, 0.55), rgba(6, 20, 38, 0) 78%),
    var(--ink-950);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(29, 62, 92, 0.55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(29, 62, 92, 0.35) 1px, transparent 1px);
  background-size: 68px 68px;
  pointer-events: none;
}

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

.page-faq .faq-hero-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--step-11);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--green);
}

.page-faq .faq-hero-title {
  margin: 14px 0 18px;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(34px, 9vw, 72px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-faq .faq-hero-accent {
  color: var(--amber);
}

.page-faq .faq-hero-lede {
  margin: 0;
  max-width: 62ch;
  font-size: var(--step-17);
  line-height: 1.9;
  color: var(--text);
}

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 30px;
  padding: 0;
  border: 1px solid var(--line);
  background: var(--line);
}

.page-faq .faq-stats .score-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px;
  background: var(--ink-950);
}

.page-faq .faq-stats .score-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--step-26);
  font-weight: 700;
  line-height: 1;
  color: var(--text);
}

.page-faq .faq-stats .score-item:nth-child(2) .score-value,
.page-faq .faq-stats .score-item:nth-child(4) .score-value {
  color: var(--green);
}

.page-faq .faq-stats .score-label {
  font-size: var(--step-11);
  letter-spacing: 0.08em;
  color: var(--muted);
}

@media (min-width: 720px) {
  .page-faq .faq-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    max-width: 760px;
  }
}

/* ---------- 区块通用 ---------- */
.page-faq .faq-section {
  padding: var(--faq-block) 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-section-head {
  max-width: 68ch;
}

.page-faq .section-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--step-11);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green);
}

.page-faq .section-title {
  margin: 10px 0 0;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(24px, 5.4vw, 34px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .faq-section-note {
  margin: 12px 0 0;
  font-size: var(--step-13);
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-section-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 217, 240, 0.4);
}

.page-faq .faq-section-note a:hover,
.page-faq .faq-section-note a:focus-visible {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

/* ---------- 口径切换 ---------- */
.page-faq .caliber-switch {
  display: inline-flex;
  gap: 1px;
  margin-top: 26px;
  border: 1px solid var(--line);
  background: var(--line);
}

.page-faq .caliber-tab {
  appearance: none;
  border: 0;
  margin: 0;
  padding: 10px 20px;
  background: var(--ink-950);
  color: var(--muted);
  font-family: var(--font-sans);
  font-size: var(--step-13);
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: color 0.18s ease, background-color 0.18s ease;
}

.page-faq .caliber-tab:hover {
  color: var(--text);
}

.page-faq .caliber-tab.is-active {
  background: var(--pitch);
  color: var(--green);
  box-shadow: inset 0 -2px 0 var(--green);
}

.page-faq .caliber-tab:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .caliber-panel {
  margin-top: 20px;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  background: var(--ink-800);
}

.page-faq .caliber-kv {
  display: grid;
  gap: 14px;
  margin: 0;
}

.page-faq .caliber-kv > div {
  display: grid;
  grid-template-columns: 8.5em minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
}

.page-faq .caliber-kv dt {
  font-family: var(--font-mono);
  font-size: var(--step-11);
  letter-spacing: 0.1em;
  color: var(--amber);
  text-transform: uppercase;
}

.page-faq .caliber-kv dd {
  margin: 0;
  font-size: var(--step-15);
  line-height: 1.7;
  color: var(--text);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 28px 0 0;
  border: 1px solid var(--line);
  background: var(--ink-900);
  padding: 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 2 / 1;
  filter: saturate(0.85) contrast(1.05);
}

.page-faq .media-caption {
  display: block;
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  font-size: var(--step-11);
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ---------- 问答组 ---------- */
.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--faq-gap);
  margin-top: 28px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-item {
  position: relative;
  border-bottom: 1px solid var(--line);
  border-left: 2px solid transparent;
  background: transparent;
  scroll-margin-top: calc(var(--header-h) + 20px);
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.page-faq .faq-item[open] {
  border-left-color: var(--amber);
  background: linear-gradient(90deg, rgba(255, 176, 32, 0.07), rgba(12, 33, 54, 0.5) 46%);
}

.page-faq .faq-item:target {
  border-left-color: var(--cyan);
  animation: faq-flash 1s ease-out 1;
}

@keyframes faq-flash {
  from {
    background-color: rgba(56, 217, 240, 0.24);
  }
  to {
    background-color: rgba(56, 217, 240, 0.06);
  }
}

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 16px 16px 16px;
  cursor: pointer;
  list-style: none;
  font-size: var(--step-17);
  font-weight: 600;
  line-height: 1.55;
  color: var(--text);
}

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

.page-faq .faq-q::marker {
  content: "";
}

.page-faq .faq-q:hover {
  color: var(--amber);
}

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .faq-num {
  flex: none;
  min-width: 2.8em;
  padding-top: 4px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--step-13);
  letter-spacing: 0.04em;
  color: var(--amber);
}

.page-faq .faq-item[open] .faq-num {
  color: var(--green);
}

.page-faq .faq-q-text {
  flex: 1 1 auto;
}

.page-faq .faq-mark {
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
  margin-top: 7px;
}

.page-faq .faq-mark::before,
.page-faq .faq-mark::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform 0.18s ease, background-color 0.18s ease;
}

.page-faq .faq-mark::before {
  top: 6px;
  left: 0;
  width: 14px;
  height: 2px;
}

.page-faq .faq-mark::after {
  top: 0;
  left: 6px;
  width: 2px;
  height: 14px;
}

.page-faq .faq-item[open] .faq-mark::after {
  transform: scaleY(0);
}

.page-faq .faq-item[open] .faq-mark::before {
  background: var(--amber);
}

.page-faq .faq-a {
  padding: 0 18px 20px 18px;
  font-size: var(--step-15);
  line-height: 1.9;
  color: var(--text);
}

.page-faq .faq-a p {
  margin: 0;
  max-width: 70ch;
}

.page-faq .faq-a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 217, 240, 0.45);
}

.page-faq .faq-a a:hover,
.page-faq .faq-a a:focus-visible {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

@media (min-width: 768px) {
  .page-faq .faq-q {
    padding: 18px 20px;
    font-size: var(--step-20);
  }

  .page-faq .faq-a {
    padding: 0 20px 24px 20px;
  }

  .page-faq .faq-num {
    min-width: 3.4em;
    padding-top: 6px;
  }
}

/* ---------- 索引区 ---------- */
.page-faq .faq-index {
  position: relative;
  border-bottom: 0;
  overflow: hidden;
  background: var(--pitch);
}

.page-faq .faq-index-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.page-faq .faq-index-bg img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  opacity: 0.26;
  filter: saturate(0.55) brightness(0.7);
}

.page-faq .faq-index-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(6, 20, 38, 0.94) 0%, rgba(6, 20, 38, 0.78) 40%, rgba(10, 43, 34, 0.92) 100%);
}

.page-faq .faq-index-inner {
  position: relative;
  z-index: 1;
}

.page-faq .idx-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: 30px;
  border: 1px solid var(--line);
  background: var(--line);
}

.page-faq .idx-cell {
  display: grid;
  grid-template-columns: 3.2em minmax(0, 1fr);
  grid-template-rows: auto auto;
  column-gap: 12px;
  row-gap: 4px;
  padding: 14px 16px;
  background: rgba(6, 20, 38, 0.92);
  text-decoration: none;
  color: var(--text);
  transition: background-color 0.18s ease, box-shadow 0.18s ease;
}

.page-faq .idx-cell:hover,
.page-faq .idx-cell:focus-visible {
  background: var(--ink-800);
  box-shadow: inset 3px 0 0 var(--amber);
  outline: none;
}

.page-faq .idx-cell:focus-visible {
  box-shadow: inset 3px 0 0 var(--amber), 0 0 0 2px var(--cyan);
}

.page-faq .idx-cell-num {
  grid-row: 1 / 3;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--step-15);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--amber);
  line-height: 1.5;
}

.page-faq .idx-cell-text {
  font-size: var(--step-15);
  line-height: 1.5;
}

.page-faq .idx-cell-meta {
  grid-column: 2;
  font-size: var(--step-11);
  letter-spacing: 0.05em;
  line-height: 1.5;
  color: var(--muted);
  transition: color 0.18s ease;
}

.page-faq .idx-cell:hover .idx-cell-meta,
.page-faq .idx-cell:focus-visible .idx-cell-meta {
  color: var(--cyan);
}

.page-faq .idx-scope-note {
  max-width: 76ch;
  margin: 24px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--green);
  font-size: var(--step-13);
  line-height: 1.85;
  color: var(--muted);
}

@media (min-width: 640px) {
  .page-faq .idx-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-faq .idx-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq {
    --faq-block: 76px;
  }

  .page-faq .faq-hero {
    padding: 60px 0 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}