.page-faq {
  --faq-nav-w: 208px;
  padding-bottom: clamp(56px, 9vw, 104px);
}

/* 面包屑 */
.page-faq .breadcrumb {
  padding-top: clamp(16px, 3vw, 26px);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--archive-blue);
}
.page-faq .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-faq .breadcrumb li {
  display: flex;
  align-items: center;
  gap: 6px;
}
.page-faq .breadcrumb li + li::before {
  content: "/";
  color: var(--glass-line);
}
.page-faq .breadcrumb a {
  color: var(--archive-blue);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--neon-cyan);
  border-bottom-color: var(--neon-cyan);
}
.page-faq .breadcrumb [aria-current="page"] {
  color: var(--glass-white);
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(22px, 4.5vw, 44px) 0 clamp(26px, 4vw, 42px);
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -18%;
  left: -12%;
  right: -12%;
  height: 360px;
  background:
    radial-gradient(58% 100% at 26% 6%, var(--glow-purple), transparent 72%),
    radial-gradient(48% 96% at 82% 18%, var(--glow-cyan), transparent 74%);
  opacity: .32;
  filter: blur(46px);
  pointer-events: none;
  z-index: 0;
}
.page-faq .faq-hero > * {
  position: relative;
  z-index: 1;
}
.page-faq .faq-hero .eyebrow {
  color: var(--neon-cyan);
}
.page-faq .faq-hero__title {
  margin: 10px 0 16px;
  font-family: var(--font-display);
  font-size: clamp(30px, 6.4vw, 56px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -.012em;
  color: var(--glass-white);
  text-shadow: 0 0 22px var(--glow-purple), 0 0 2px rgba(168, 85, 247, .9);
  max-width: 20ch;
}
.page-faq .faq-hero .lede {
  max-width: 44ch;
  margin: 0;
  font-family: var(--font-editorial);
  font-size: 16px;
  line-height: 1.85;
  color: var(--archive-blue);
}

/* 顶部要点索引带 */
.page-faq .faq-quick {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: clamp(20px, 3.5vw, 30px);
}
.page-faq .faq-quick__item {
  display: inline-flex;
  align-items: center;
  padding: 9px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--glass);
  color: var(--glass-white);
  font-size: 13px;
  line-height: 1.4;
  text-decoration: none;
  transition: border-color .2s var(--ease), color .2s var(--ease), background .2s var(--ease);
}
.page-faq .faq-quick__item:hover,
.page-faq .faq-quick__item:focus-visible {
  border-color: var(--neon-cyan);
  color: var(--neon-cyan);
  background: rgba(34, 211, 238, .1);
}

/* 分栏骨架 */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  align-items: start;
  margin-top: clamp(6px, 2vw, 18px);
}

/* 左侧锚点窄栏 */
.page-faq .faq-nav {
  position: relative;
}
.page-faq .faq-nav__label {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--archive-blue);
}
.page-faq .faq-nav__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}
.page-faq .faq-nav__list > li {
  flex: 0 0 auto;
}
.page-faq .faq-nav__link {
  display: flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
  padding: 9px 14px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  background: rgba(255, 255, 255, .04);
  color: var(--archive-blue);
  font-size: 14px;
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}
.page-faq .faq-nav__link:hover,
.page-faq .faq-nav__link:focus-visible {
  color: var(--glass-white);
  border-color: var(--neon-purple);
  background: rgba(168, 85, 247, .16);
}
.page-faq .faq-nav__count {
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--rank-orange);
}

/* 右侧内容流 */
.page-faq .faq-body {
  display: flex;
  flex-direction: column;
  gap: clamp(34px, 5.5vw, 58px);
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: 120px;
  min-width: 0;
}
.page-faq .faq-group__head {
  padding-left: 15px;
  border-left: 2px solid var(--neon-purple);
  margin-bottom: 18px;
}
.page-faq .faq-group__index {
  margin: 0 0 6px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--rank-orange);
}
.page-faq .faq-group__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.6vw, 32px);
  font-weight: 800;
  line-height: 1.2;
  color: var(--glass-white);
}
.page-faq .faq-group__desc {
  margin: 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--archive-blue);
}

/* 插图 */
.page-faq .faq-figure {
  margin: 0 0 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--ink-800);
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.page-faq .faq-figure figcaption {
  padding: 10px 16px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  line-height: 1.6;
  color: var(--archive-blue);
}

/* 手风琴 */
.page-faq .accordion {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.page-faq .accordion-item {
  position: relative;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--glass);
  backdrop-filter: blur(8px);
  overflow: hidden;
  transition: border-color .25s var(--ease), background .25s var(--ease);
}
.page-faq .accordion-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--rank-orange), var(--neon-purple));
  opacity: 0;
  transition: opacity .25s var(--ease);
}
.page-faq .accordion-item:hover,
.page-faq .accordion-item[data-open] {
  border-color: var(--line);
  background: rgba(255, 255, 255, .07);
}
.page-faq .accordion-item:hover::before,
.page-faq .accordion-item[data-open]::before {
  opacity: 1;
}
.page-faq .accordion-h3 {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}
.page-faq .accordion-trigger {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 15px 16px 15px 20px;
  border: 0;
  background: none;
  color: var(--glass-white);
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  text-align: left;
  cursor: pointer;
  transition: color .2s var(--ease);
}
.page-faq .accordion-trigger:hover,
.page-faq .accordion-trigger:focus-visible {
  color: var(--neon-cyan);
}
.page-faq .accordion-trigger:focus-visible {
  outline: 2px solid var(--neon-cyan);
  outline-offset: -2px;
}
.page-faq .accordion-trigger__icon {
  position: relative;
  flex: 0 0 18px;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  border: 1px solid var(--glass-line);
  border-radius: 50%;
  transition: border-color .25s var(--ease);
}
.page-faq .accordion-trigger__icon::before,
.page-faq .accordion-trigger__icon::after {
  content: "";
  position: absolute;
  background: var(--neon-cyan);
}
.page-faq .accordion-trigger__icon::before {
  left: 4px;
  right: 4px;
  top: 50%;
  height: 1.5px;
  transform: translateY(-50%);
}
.page-faq .accordion-trigger__icon::after {
  top: 4px;
  bottom: 4px;
  left: 50%;
  width: 1.5px;
  transform: translateX(-50%);
  transition: transform .25s var(--ease), opacity .25s var(--ease);
}
.page-faq .accordion-trigger[aria-expanded="true"] .accordion-trigger__icon {
  border-color: var(--rank-orange);
}
.page-faq .accordion-trigger[aria-expanded="true"] .accordion-trigger__icon::after {
  opacity: 0;
  transform: translateX(-50%) rotate(90deg);
}
.page-faq .accordion-panel {
  padding: 0 18px 18px 20px;
}
.page-faq .accordion-panel p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--archive-blue);
}

/* 术语速查 */
.page-faq .term-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-faq .term-card {
  min-width: 0;
}
.page-faq .term-card__link {
  display: block;
  height: 100%;
  padding: 14px 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, .04);
  text-decoration: none;
  transition: border-color .2s var(--ease), background .2s var(--ease), transform .2s var(--ease);
}
.page-faq .term-card__link:hover,
.page-faq .term-card__link:focus-visible {
  border-color: var(--neon-purple);
  background: rgba(168, 85, 247, .12);
  transform: translateY(-2px);
}
.page-faq .term-card__term {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--neon-cyan);
}
.page-faq .term-card__def {
  display: block;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--archive-blue);
}

/* 尾部行动区 */
.page-faq .faq-cta {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: clamp(20px, 3.5vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(135deg, rgba(168, 85, 247, .18), rgba(34, 211, 238, .1)),
    var(--ink-800);
}
.page-faq .faq-cta__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.8vw, 24px);
  font-weight: 800;
  color: var(--glass-white);
}
.page-faq .faq-cta__desc {
  margin: 0;
  max-width: 52ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--archive-blue);
}

/* 平板与桌面 */
@media (min-width: 700px) {
  .page-faq .term-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-faq .faq-cta {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
  }
  .page-faq .faq-cta .btn-row {
    flex: 0 0 auto;
  }
}

@media (min-width: 940px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-nav-w) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 52px);
  }
  .page-faq .faq-nav {
    position: sticky;
    top: 108px;
  }
  .page-faq .faq-nav__list {
    flex-direction: column;
    gap: 6px;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-faq .faq-nav__link {
    justify-content: space-between;
    white-space: normal;
    border-radius: var(--radius-sm);
  }
  .page-faq .term-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1180px) {
  .page-faq {
    --faq-nav-w: 232px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .accordion-trigger__icon::after,
  .page-faq .term-card__link,
  .page-faq .faq-quick__item {
    transition: none;
  }
  .page-faq .term-card__link:hover {
    transform: none;
  }
}