.page-faq {
  background: var(--bg-deep);
  color: var(--text-main);
  font-family: var(--font-body);
  line-height: 1.7;
  overflow-x: hidden;
}

/* ===== Hero ===== */
.page-faq__hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + 2.75rem) 0 3.5rem;
  background:
    radial-gradient(ellipse 60% 50% at 82% 0%, rgba(0, 230, 140, 0.10), transparent 70%),
    radial-gradient(ellipse 40% 40% at 8% 10%, rgba(0, 166, 255, 0.08), transparent 60%);
}

.page-faq__hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 230, 140, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 230, 140, 0.045) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: linear-gradient(to right, transparent, black 70%);
  mask-image: linear-gradient(to right, transparent, black 70%);
  pointer-events: none;
  z-index: 0;
}

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

.page-faq__hero-grid {
  display: grid;
  gap: 2rem;
  margin-top: 2.5rem;
}

.page-faq__hero-main {
  max-width: 760px;
}

.page-faq__title {
  font-family: var(--font-display);
  font-size: clamp(2.05rem, 6vw, 3.4rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin: 1.1rem 0 1.25rem;
}

.page-faq__title::after {
  content: "";
  display: block;
  width: 68px;
  height: 6px;
  margin-top: 1.15rem;
  transform: skewX(-18deg);
  background: linear-gradient(90deg, var(--neon-green), var(--electric-blue));
}

.page-faq__lead {
  color: var(--text-sub);
  font-size: clamp(1rem, 2vw, 1.125rem);
  max-width: 56ch;
  line-height: 1.75;
  margin: 0;
}

.page-faq__hero-side {
  border: 1px solid var(--border-c);
  border-left: 4px solid var(--gold);
  background: rgba(17, 26, 36, 0.7);
  padding: 1.35rem 1.5rem;
}

.page-faq__side-note {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-sub);
  margin: 0 0 1rem;
}

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

.page-faq__stat-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid var(--border-c);
  padding-bottom: 0.6rem;
}

.page-faq__stat-item:last-child {
  border-bottom-color: transparent;
}

.page-faq__stat-item dt {
  color: var(--text-sub);
  font-size: 0.9rem;
}

.page-faq__stat-item dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--neon-green);
  white-space: nowrap;
}

.page-faq__side-help {
  margin: 1.1rem 0 0;
  color: var(--text-sub);
  font-size: 0.88rem;
}

.page-faq__side-help a {
  color: var(--electric-blue);
  text-decoration: none;
  font-weight: 600;
}

/* ===== 主体布局 ===== */
.page-faq__body {
  padding: 2rem 0 var(--space-sec);
}

.page-faq__layout {
  display: grid;
  gap: 2.5rem;
}

.page-faq__content {
  min-width: 0;
}

/* ===== 侧边栏 ===== */
.page-faq__sidebar {
  background: var(--bg-raised);
  border: 1px solid var(--border-c);
  padding: 1.1rem 1.25rem;
  overflow-x: auto;
}

.page-faq__sidebar-label {
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-sub);
  margin: 0 0 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.page-faq__sidebar-label::before {
  content: "";
  width: 22px;
  height: 4px;
  background: var(--neon-green);
  transform: skewX(-20deg);
}

.page-faq__sidebar .chapter-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 0.45rem;
  min-width: max-content;
}

.page-faq__sidebar .chapter-nav li {
  flex-shrink: 0;
}

.page-faq__sidebar .chapter-nav a {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.6rem 0.45rem;
  color: var(--text-sub);
  text-decoration: none;
  font-size: 0.92rem;
  border-bottom: 1px solid var(--border-c);
  transition: color 0.25s, border-color 0.25s, background 0.25s;
  white-space: nowrap;
}

.page-faq__sidebar .chapter-nav a:hover,
.page-faq__sidebar .chapter-nav a.is-active {
  color: var(--text-main);
  border-bottom-color: var(--neon-green);
}

.page-faq__sidebar .chapter-nav a.is-active {
  background: rgba(0, 230, 140, 0.06);
}

.page-faq__sidebar-num {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--gold);
}

.page-faq__sidebar-cta {
  margin-top: 1.75rem;
  padding-top: 1.5rem;
  border-top: 2px solid var(--border-c);
}

.page-faq__sidebar-cta-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  margin: 0 0 0.5rem;
  color: var(--text-main);
}

.page-faq__sidebar-cta-text {
  font-size: 0.85rem;
  color: var(--text-sub);
  margin: 0 0 1rem;
  line-height: 1.6;
}

/* ===== 分类章节 ===== */
.page-faq__category {
  border-top: 2px solid var(--border-c);
  padding: 2.25rem 0 3rem;
}

.page-faq__category:first-child {
  border-top-color: var(--neon-green);
}

.page-faq__category-head {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.page-faq__category-num {
  font-family: var(--font-mono);
  font-size: clamp(2.6rem, 7vw, 4rem);
  font-style: italic;
  font-weight: 800;
  line-height: 0.9;
  color: var(--gold);
  text-shadow: 0 0 34px rgba(255, 184, 0, 0.28);
  flex-shrink: 0;
  margin-top: 0.1em;
}

.page-faq__category-intro {
  min-width: 0;
}

.page-faq__category-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 0.7rem;
}

.page-faq__category-title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.5vw, 1.75rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
  line-height: 1.15;
}

.page-faq__category-intro p {
  color: var(--text-sub);
  font-size: 0.95rem;
  line-height: 1.7;
  margin: 0;
  max-width: 62ch;
}

/* ===== 分类视觉图片 ===== */
.page-faq__category-visual {
  margin: 0 0 1.75rem;
  max-width: 380px;
  border: 1px solid var(--border-c);
  background: var(--bg-raised);
  overflow: hidden;
}

.page-faq__category-visual--square {
  max-width: 300px;
}

.page-faq__category-visual img {
  display: block;
  width: 100%;
  height: auto;
}

/* ===== 手风琴 ===== */
.page-faq [data-accordion] .accordion__item {
  border-bottom: 1px solid var(--border-c);
}

.page-faq [data-accordion] .accordion__item:first-child {
  border-top: 1px solid var(--border-c);
}

.page-faq [data-accordion] .accordion__trigger {
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 100%;
  margin: 0;
  padding: 1.2rem 0.25rem;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 1.02rem;
  line-height: 1.45;
  color: var(--text-main);
  transition: color 0.25s, padding-left 0.3s;
}

.page-faq [data-accordion] .accordion__trigger:hover {
  color: var(--electric-blue);
  padding-left: 0.5rem;
}

.page-faq [data-accordion] .accordion__item[data-open] .accordion__trigger {
  color: var(--neon-green);
}

.page-faq__q-num {
  font-family: var(--font-mono);
  font-style: italic;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--gold);
  flex-shrink: 0;
  transition: transform 0.3s, color 0.3s;
}

.page-faq [data-accordion] .accordion__item[data-open] .page-faq__q-num {
  transform: scale(1.3);
  color: var(--gold);
}

.page-faq__q-text {
  flex: 1;
  min-width: 0;
  font-weight: 600;
}

.page-faq [data-accordion] .accordion__icon {
  position: relative;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  border: 1px solid var(--border-c);
  background: var(--bg-raised);
  transition: transform 0.3s, border-color 0.3s;
}

.page-faq [data-accordion] .accordion__icon::before,
.page-faq [data-accordion] .accordion__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 10px;
  height: 2px;
  background: var(--electric-blue);
  transition: background 0.25s;
}

.page-faq [data-accordion] .accordion__icon::before {
  transform: translate(-50%, -50%);
}

.page-faq [data-accordion] .accordion__icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.page-faq [data-accordion] .accordion__item[data-open] .accordion__icon {
  transform: rotate(45deg);
  border-color: var(--neon-green);
}

.page-faq [data-accordion] .accordion__item[data-open] .accordion__icon::before,
.page-faq [data-accordion] .accordion__item[data-open] .accordion__icon::after {
  background: var(--neon-green);
}

.page-faq [data-accordion] .accordion__panel {
  padding: 0 0.25rem 1.4rem 2.6rem;
  color: var(--text-sub);
  font-size: 0.95rem;
  line-height: 1.85;
}

.page-faq [data-accordion] .accordion__panel p {
  margin: 0;
}

.page-faq [data-accordion] .accordion__panel a {
  color: var(--electric-blue);
  text-decoration: none;
  font-weight: 600;
}

.page-faq [data-accordion] .accordion__panel a:hover {
  text-decoration: underline;
}

/* ===== JS 手风琴动画 ===== */
.js .page-faq [data-accordion] .accordion__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.35s ease-out;
}

.js .page-faq [data-accordion] .accordion__item[data-open] .accordion__panel {
  grid-template-rows: 1fr;
}

.js .page-faq [data-accordion] .accordion__panel > * {
  min-height: 0;
  overflow: hidden;
}

/* ===== 移动端标签式目录 ===== */
@media (max-width: 991px) {
  .page-faq__sidebar .chapter-nav a {
    border: 1px solid var(--border-c);
    background: var(--bg-deep);
    border-radius: 4px;
    padding: 0.5rem 0.85rem;
  }
}

/* ===== 桌面端 ===== */
@media (min-width: 992px) {
  .page-faq__hero {
    padding: calc(var(--header-h) + 4.5rem) 0 4.5rem;
  }

  .page-faq__hero-grid {
    grid-template-columns: minmax(0, 1fr) 320px;
    align-items: end;
    gap: 3rem;
    margin-top: 3rem;
  }

  .page-faq__body {
    padding: 3.5rem 0 var(--space-sec);
  }

  .page-faq__layout {
    grid-template-columns: 270px minmax(0, 1fr);
    gap: 3.5rem;
    align-items: start;
  }

  .page-faq__sidebar {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
    overflow: visible;
    background: transparent;
    border: 0;
    padding: 0;
  }

  .page-faq__sidebar .chapter-nav ul {
    display: block;
    min-width: 0;
  }

  .page-faq__sidebar .chapter-nav li {
    margin-bottom: 0.1rem;
  }

  .page-faq__sidebar .chapter-nav a {
    border-radius: 0;
    border: 0;
    border-bottom: 1px solid var(--border-c);
    background: transparent;
    padding: 0.65rem 0.5rem;
  }

  .page-faq__sidebar-cta {
    background: var(--bg-raised);
    border: 1px solid var(--border-c);
    padding: 1.25rem 1.35rem;
  }

  .page-faq__category {
    padding: 2.75rem 0 3.5rem;
  }

  .page-faq__category-head {
    gap: 2rem;
    margin-bottom: 2rem;
  }

  .page-faq__category-visual {
    margin-left: 4.25rem;
  }
}