.page-faq {
  --faq-glow: rgba(123, 47, 191, 0.28);
  --faq-line: rgba(184, 194, 214, 0.18);
  background:
    radial-gradient(ellipse at 18% 8%, rgba(123, 47, 191, 0.18), transparent 46%),
    radial-gradient(ellipse at 88% 18%, rgba(0, 212, 255, 0.1), transparent 40%),
    var(--bg-space);
}

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(115deg, var(--bg-deep) 0%, var(--bg-space) 58%, var(--bg-space-2) 100%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -90px;
  right: -130px;
  width: 420px;
  height: 420px;
  border-radius: 50px;
  background: linear-gradient(135deg, rgba(123, 47, 191, 0.42), rgba(0, 212, 255, 0.14));
  transform: rotate(18deg);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  bottom: -60px;
  left: 8%;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(198, 244, 50, 0.16), transparent 70%);
  pointer-events: none;
}

.page-faq .faq-hero__container {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 36px;
  padding-top: calc(var(--header-height) * 0.5 + 40px);
  padding-bottom: 64px;
}

.page-faq .faq-hero__content {
  max-width: 680px;
}

.page-faq .faq-breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
  color: var(--text-muted);
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
}

.page-faq .faq-breadcrumb a {
  color: var(--electric-blue);
  text-decoration: none;
}

.page-faq .faq-breadcrumb a:hover {
  color: var(--neon-bright);
}

.page-faq .faq-breadcrumb__sep {
  opacity: 0.5;
}

.page-faq .faq-hero__title {
  margin: 12px 0 18px;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-weight: 700;
  font-style: italic;
  font-size: clamp(1.9rem, 5vw, 3.4rem);
  line-height: 1.1;
  color: var(--text-primary);
  transform: skewX(-5deg);
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 58ch;
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.75;
}

.page-faq .faq-hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 22px;
}

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

.page-faq .faq-hero__visual {
  display: flex;
  align-items: center;
}

.page-faq .faq-hero__visual-frame {
  position: relative;
  width: 100%;
  max-width: 620px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(0, 212, 255, 0.4);
  background: var(--bg-deep);
  box-shadow:
    0 24px 70px rgba(8, 15, 36, 0.65),
    0 0 0 1px rgba(164, 76, 240, 0.2),
    0 0 90px rgba(123, 47, 191, 0.25);
  transform: rotate(1.2deg) skewY(-1.2deg);
  transition: transform 0.3s ease;
}

.page-faq .faq-hero__visual:hover .faq-hero__visual-frame {
  transform: rotate(0deg) skewY(0deg);
}

.page-faq .faq-hero__visual-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(123, 47, 191, 0.12), rgba(0, 212, 255, 0.08));
  pointer-events: none;
}

.page-faq .faq-hero__img,
.page-faq .faq-item__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-layout {
  display: grid;
  gap: 40px;
  padding-top: 48px;
  padding-bottom: 96px;
}

.page-faq .faq-toc__sticky {
  display: grid;
  gap: 20px;
}

.page-faq .faq-toc__title {
  display: inline-block;
  justify-self: start;
  margin: 0;
  padding: 10px 16px;
  border: 1px solid rgba(198, 244, 50, 0.4);
  border-radius: var(--radius-pill);
  color: var(--lime);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-faq .faq-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  background: rgba(16, 34, 75, 0.6);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-faq .faq-toc__link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--faq-line);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  line-height: 1.4;
  transition: background 0.3s ease, color 0.3s ease, padding-left 0.3s ease;
}

.page-faq .faq-toc__link:last-child {
  border-bottom: 0;
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  background: rgba(123, 47, 191, 0.26);
  color: var(--text-primary);
  padding-left: 22px;
  outline: none;
}

.page-faq .faq-toc__num {
  color: var(--lime);
  font-weight: 600;
  font-size: 0.8125rem;
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-toc__card {
  padding: 22px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(123, 47, 191, 0.22), rgba(16, 34, 75, 0.72));
  border: 1px solid rgba(164, 76, 240, 0.35);
}

.page-faq .faq-toc__card-label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--electric-blue);
}

.page-faq .faq-toc__card-text {
  margin: 0 0 16px;
  color: var(--text-secondary);
  font-size: 0.85rem;
  line-height: 1.6;
}

.page-faq .faq-toc__card-btn {
  width: 100%;
}

.page-faq .faq-section {
  scroll-margin-top: calc(var(--header-height) + 24px);
  margin-bottom: 52px;
}

.page-faq .faq-section:target {
  outline: 1px dashed rgba(0, 212, 255, 0.4);
  outline-offset: 10px;
  border-radius: var(--radius-md);
}

.page-faq .faq-section__head {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 22px;
  padding-left: 18px;
}

.page-faq .faq-section__head::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 3px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--neon-purple), var(--electric-blue));
}

.page-faq .faq-section__index {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 42px;
  padding: 8px 12px;
  border: 1px solid rgba(198, 244, 50, 0.45);
  border-radius: var(--radius-pill);
  color: var(--lime);
  font-weight: 600;
  font-size: 0.8125rem;
}

.page-faq .faq-section__title {
  margin: 0 0 6px;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-weight: 700;
  font-style: italic;
  font-size: clamp(1.5rem, 3vw, 2rem);
  line-height: 1.2;
  color: var(--text-primary);
  transform: skewX(-5deg);
}

.page-faq .faq-section__lead {
  margin: 0;
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.page-faq .faq-section__foot {
  margin-top: 18px;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  border: 1px dashed rgba(0, 212, 255, 0.3);
  background: rgba(0, 212, 255, 0.06);
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.6;
}

.page-faq .faq-section__foot--center {
  text-align: center;
}

.page-faq .faq-section__foot-btn {
  margin-left: 8px;
}

.page-faq .faq-accordion {
  display: grid;
  gap: 12px;
}

.page-faq .faq-item {
  background: rgba(16, 34, 75, 0.6);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-md);
  transition: border-color 0.3s ease, background 0.3s ease, box-shadow 0.3s ease;
}

.page-faq .faq-item[open] {
  border-color: rgba(164, 76, 240, 0.5);
  background: linear-gradient(135deg, rgba(123, 47, 191, 0.18), rgba(16, 34, 75, 0.72));
  box-shadow: 0 14px 40px rgba(8, 15, 36, 0.45);
}

.page-faq .faq-item__summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item__summary:focus-visible {
  outline: 2px solid var(--electric-blue);
  outline-offset: -2px;
  border-radius: var(--radius-md);
}

.page-faq .faq-item__num {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(198, 244, 50, 0.14);
  border: 1px solid rgba(198, 244, 50, 0.4);
  color: var(--lime);
  font-size: 0.75rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  transition: background 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
}

.page-faq .faq-item[open] .faq-item__num {
  background: linear-gradient(135deg, var(--neon-purple), var(--neon-bright));
  border-color: transparent;
  color: var(--white);
  box-shadow: 0 6px 18px rgba(123, 47, 191, 0.4);
}

.page-faq .faq-item__title {
  flex: 1;
  min-width: 0;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-weight: 600;
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--text-primary);
}

.page-faq .faq-item__icon {
  flex-shrink: 0;
  position: relative;
  width: 18px;
  height: 18px;
}

.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 14px;
  height: 2px;
  border-radius: 2px;
  background: var(--text-secondary);
  transform: translate(-50%, -50%);
  transition: background 0.3s ease, transform 0.3s ease;
}

.page-faq .faq-item__icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.page-faq .faq-item[open] .faq-item__icon::before {
  background: var(--electric-blue);
  transform: translate(-50%, -50%) rotate(45deg);
}

.page-faq .faq-item[open] .faq-item__icon::after {
  background: var(--electric-blue);
  transform: translate(-50%, -50%) rotate(-45deg);
}

.page-faq .faq-item__body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.3s ease;
}

.page-faq .faq-item[open] .faq-item__body {
  grid-template-rows: 1fr;
}

.page-faq .faq-item__inner {
  overflow: hidden;
  min-height: 0;
  padding: 0 18px;
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.page-faq .faq-item__inner p {
  margin: 0 0 10px;
}

.page-faq .faq-item__inner > :last-child {
  margin-bottom: 18px;
}

.page-faq .faq-item__inner a {
  color: var(--electric-blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 212, 255, 0.3);
  transition: color 0.3s ease, border-color 0.3s ease;
}

.page-faq .faq-item__inner a:hover {
  color: var(--neon-bright);
  border-color: currentColor;
}

.page-faq .faq-tip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 4px 0 0;
  padding: 7px 12px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(0, 212, 255, 0.28);
  background: rgba(0, 212, 255, 0.08);
  color: var(--electric-blue);
  font-size: 0.8125rem;
  line-height: 1.4;
}

.page-faq .faq-tip::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(198, 244, 50, 0.16);
}

.page-faq .faq-item__cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  align-items: center;
}

.page-faq .faq-item__figure {
  max-width: 200px;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid rgba(0, 212, 255, 0.25);
}

.page-faq .faq-density {
  display: grid;
  gap: 10px;
  margin: 14px 0 2px;
}

.page-faq .faq-density__item {
  display: grid;
  grid-template-columns: 82px 1fr;
  gap: 12px;
  align-items: center;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.page-faq .faq-density__bar {
  height: 8px;
  border-radius: 99px;
  background: var(--neon-purple);
}

.page-faq .faq-density__bar--freq {
  width: 100%;
  background: var(--lime);
}

.page-faq .faq-density__bar--core {
  width: 78%;
  background: linear-gradient(90deg, var(--neon-purple), var(--neon-bright));
}

.page-faq .faq-density__bar--extra {
  width: 56%;
  background: var(--electric-blue);
}

@media (min-width: 700px) {
  .page-faq .faq-hero__container {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
    gap: 48px;
    padding-top: calc(var(--header-height) * 0.5 + 56px);
    padding-bottom: 84px;
  }

  .page-faq .faq-item__cols {
    grid-template-columns: 1fr 180px;
  }

  .page-faq .faq-density {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .page-faq .faq-density__item {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-toc__sticky {
    position: sticky;
    top: calc(var(--header-height) + 24px);
  }
}