.page-faq {
  --faq-line: var(--line);
  --faq-gap: clamp(16px, 2.4vw, 28px);
  padding-bottom: clamp(48px, 7vw, 96px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(24px, 4vw, 48px) 0 clamp(32px, 5vw, 64px);
  border-bottom: var(--edge) solid var(--faq-line);
  background:
    radial-gradient(120% 100% at 6% 0%, rgba(43, 26, 140, 0.62), rgba(43, 26, 140, 0) 62%),
    linear-gradient(180deg, rgba(17, 18, 31, 0.94), rgba(7, 7, 12, 0));
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, rgba(167, 167, 196, 0.06) 0 1px, transparent 1px 40px),
    repeating-linear-gradient(90deg, rgba(167, 167, 196, 0.05) 0 1px, transparent 1px 40px);
  opacity: 0.9;
}

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

.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin: 0 0 clamp(18px, 3vw, 30px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-faq .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-faq .breadcrumb a:hover {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.page-faq .breadcrumb span:last-child {
  color: var(--paper);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-faq .faq-hero__lead h1 {
  margin: 14px 0 18px;
  font-family: var(--font-display);
  font-size: clamp(2rem, 8vw, 4.25rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--paper);
  max-width: 18em;
}

.page-faq .faq-hero__text {
  margin: 0 0 26px;
  max-width: 60ch;
  font-size: clamp(0.95rem, 1.6vw, 1.0625rem);
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-hero__frame {
  position: relative;
  border: var(--edge) solid var(--violet);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
  background: linear-gradient(160deg, rgba(17, 18, 31, 0.96), rgba(35, 36, 58, 0.72));
  padding: clamp(18px, 3vw, 28px);
}

.page-faq .faq-hero__frame::before,
.page-faq .faq-hero__frame::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border: 2px solid var(--lime);
  pointer-events: none;
}

.page-faq .faq-hero__frame::before {
  top: -9px;
  left: -9px;
  border-right: 0;
  border-bottom: 0;
}

.page-faq .faq-hero__frame::after {
  right: -9px;
  bottom: -9px;
  border-top: 0;
  border-left: 0;
}

.page-faq .faq-hero__frame-label {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.page-faq .faq-stat {
  border-top: 1px solid var(--line-soft);
  padding-top: 12px;
}

.page-faq .faq-stat__n {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.15rem, 2.4vw, 1.5rem);
  font-weight: 700;
  color: var(--paper);
  letter-spacing: -0.01em;
  overflow-wrap: anywhere;
}

.page-faq .faq-stat__k {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 置顶热门三条 ---------- */
.page-faq .faq-hot {
  padding: clamp(32px, 5vw, 56px) 0 clamp(8px, 2vw, 16px);
}

.page-faq .faq-hot__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-hot__card {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  height: 100%;
  padding: clamp(16px, 2.4vw, 22px);
  border: var(--edge) solid var(--line);
  border-top-color: var(--orange);
  border-radius: var(--radius);
  background: var(--ink-2);
  color: var(--paper);
  text-decoration: none;
  transition: transform 200ms var(--ease-out), box-shadow 200ms var(--ease-out), border-color 200ms var(--ease-out);
}

.page-faq .faq-hot__card:hover,
.page-faq .faq-hot__card:focus-visible {
  transform: translateY(-4px);
  border-color: var(--violet);
  box-shadow: var(--shadow-hard-sm);
}

.page-faq .faq-hot__no {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--orange);
  padding-top: 3px;
}

.page-faq .faq-hot__q {
  flex: 1 1 auto;
  min-width: 0;
  font-size: clamp(0.95rem, 1.6vw, 1.0625rem);
  font-weight: 700;
  line-height: 1.6;
}

.page-faq .faq-hot__arrow {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  color: var(--lime);
  padding-top: 2px;
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-body {
  padding-top: clamp(24px, 3vw, 40px);
}

.page-faq .faq-layout {
  display: grid;
  gap: clamp(24px, 3vw, 40px);
}

.page-faq .faq-index {
  border: var(--edge) solid var(--line);
  border-left-color: var(--violet);
  border-radius: var(--radius);
  background: var(--ink-2);
  padding: 18px;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index__list li {
  flex: 0 0 auto;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border: 2px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
  font-size: 0.875rem;
  white-space: nowrap;
  transition: border-color 160ms var(--ease-out), color 160ms var(--ease-out);
}

.page-faq .faq-index__no {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--violet);
}

.page-faq .faq-index__n {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-color: var(--lime);
  color: var(--lime);
}

.page-faq .faq-index__foot {
  margin: 14px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 分组 ---------- */
.page-faq .faq-list {
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--bar-h) + 24px);
  padding-bottom: clamp(28px, 4vw, 44px);
  margin-bottom: clamp(28px, 4vw, 44px);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.page-faq .faq-group__no {
  font-family: var(--font-mono);
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--violet);
}

.page-faq .faq-group__head h3 {
  flex: 1 1 auto;
  min-width: 0;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 2rem);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-group__count {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 3px 8px;
  white-space: nowrap;
}

.page-faq .faq-group__note {
  margin: 0 0 18px;
  max-width: 68ch;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-group:target .faq-group__head h3 {
  color: var(--lime);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-items {
  display: grid;
  gap: 12px;
}

.page-faq .faq-item {
  border: var(--edge) solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-2);
  transition: border-color 180ms var(--ease-out), box-shadow 180ms var(--ease-out);
}

.page-faq .faq-item[open] {
  border-color: var(--violet);
  box-shadow: inset 5px 0 0 var(--lime);
}

.page-faq .faq-item__summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: clamp(14px, 2vw, 18px) clamp(14px, 2vw, 20px);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item__summary::after {
  content: "+";
  flex: 0 0 auto;
  margin-left: auto;
  padding-left: 12px;
  font-family: var(--font-mono);
  font-size: 1.125rem;
  line-height: 1.4;
  color: var(--lime);
}

.page-faq .faq-item[open] .faq-item__summary::after {
  content: "–";
}

.page-faq .faq-item__summary:hover .faq-item__q,
.page-faq .faq-item__summary:focus-visible .faq-item__q {
  color: var(--lime);
}

.page-faq .faq-item__no {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--orange);
  padding-top: 3px;
}

.page-faq .faq-item__q {
  flex: 1 1 auto;
  min-width: 0;
  font-size: clamp(0.9375rem, 1.5vw, 1.0625rem);
  font-weight: 700;
  line-height: 1.6;
  color: var(--paper);
  overflow-wrap: anywhere;
  transition: color 160ms var(--ease-out);
}

.page-faq .faq-item__a {
  padding: 0 clamp(14px, 2vw, 20px) clamp(16px, 2.4vw, 22px) calc(clamp(14px, 2vw, 20px) + 40px);
  border-top: 1px solid var(--line-soft);
  margin-top: 2px;
}

.page-faq .faq-item__a p {
  margin: 14px 0 0;
  max-width: 68ch;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 插图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 20px;
  border: var(--edge) solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-3);
  box-shadow: var(--shadow-hard-sm);
  overflow: hidden;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 12 / 7;
}

.page-faq .faq-figure__cap {
  padding: 10px 14px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 收尾联络 ---------- */
.page-faq .faq-help {
  scroll-margin-top: calc(var(--bar-h) + 24px);
  border: var(--edge) solid var(--violet);
  border-radius: var(--radius);
  background: linear-gradient(150deg, rgba(43, 26, 140, 0.5), rgba(17, 18, 31, 0.96));
  padding: clamp(20px, 3.2vw, 34px);
}

.page-faq .faq-help__grid {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-faq .faq-help__main h3 {
  margin: 12px 0 14px;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 2rem);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-help__text {
  margin: 0 0 18px;
  max-width: 60ch;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-help__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-help__list li {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  padding: 10px 0;
  border-top: 1px solid var(--line-soft);
  font-size: 0.875rem;
  line-height: 1.7;
}

.page-faq .faq-help__k {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  padding-top: 2px;
}

.page-faq .faq-help__v {
  flex: 1 1 auto;
  min-width: 0;
  color: var(--paper);
}

.page-faq .faq-help__card {
  border: var(--edge) solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-2);
  padding: clamp(16px, 2.4vw, 22px);
}

.page-faq .faq-help__card-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-help__row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  margin: 0 0 10px;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-faq .faq-help__row a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 255, 61, 0.4);
}

.page-faq .faq-help__row a:hover {
  border-bottom-color: var(--lime);
}

.page-faq .faq-help__card .btn {
  margin-top: 8px;
}

/* ---------- 桌面 ---------- */
@media (min-width: 1000px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

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

  .page-faq .faq-layout {
    grid-template-columns: minmax(210px, 250px) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--bar-h) + 20px);
  }

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

  .page-faq .faq-index__list li {
    flex: 1 1 auto;
  }

  .page-faq .faq-index__link {
    white-space: normal;
  }

  .page-faq .faq-index__label {
    flex: 1 1 auto;
    min-width: 0;
  }

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  /* 当前定位的分类高亮 */
  .page-faq .faq-layout:has(#access:target) .faq-index__link[href="#access"],
  .page-faq .faq-layout:has(#tags:target) .faq-index__link[href="#tags"],
  .page-faq .faq-layout:has(#download:target) .faq-index__link[href="#download"],
  .page-faq .faq-layout:has(#presets:target) .faq-index__link[href="#presets"],
  .page-faq .faq-layout:has(#account:target) .faq-index__link[href="#account"],
  .page-faq .faq-layout:has(#help:target) .faq-index__link[href="#help"] {
    border-color: var(--lime);
    box-shadow: inset 4px 0 0 var(--violet);
    color: var(--lime);
  }

  .page-faq .faq-layout:has(#access:target) .faq-index__link[href="#access"] .faq-index__label,
  .page-faq .faq-layout:has(#tags:target) .faq-index__link[href="#tags"] .faq-index__label,
  .page-faq .faq-layout:has(#download:target) .faq-index__link[href="#download"] .faq-index__label,
  .page-faq .faq-layout:has(#presets:target) .faq-index__link[href="#presets"] .faq-index__label,
  .page-faq .faq-layout:has(#account:target) .faq-index__link[href="#account"] .faq-index__label,
  .page-faq .faq-layout:has(#help:target) .faq-index__link[href="#help"] .faq-index__label {
    font-weight: 700;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-item__summary {
    padding: 20px 24px;
  }

  .page-faq .faq-item__a {
    padding: 0 24px 24px 64px;
  }
}

/* ---------- 窄屏 ---------- */
@media (max-width: 640px) {
  .page-faq .faq-hero__stats {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-hero__actions .btn {
    flex: 1 1 auto;
    text-align: center;
  }

  .page-faq .faq-item__a {
    padding-left: clamp(14px, 2vw, 20px);
  }

  .page-faq .faq-group__count {
    order: 3;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-hot__card,
  .page-faq .faq-item,
  .page-faq .faq-item__q,
  .page-faq .faq-index__link {
    transition: none;
  }

  .page-faq .faq-hot__card:hover {
    transform: none;
  }
}