.page-faq {
  --faq-index-w: 238px;
  --faq-dot: var(--phantom);
  background: var(--night);
  color: var(--mist);
  font-family: var(--font-body);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(1.4rem, 3.5vw, 2.6rem) clamp(3rem, 7vw, 5.4rem);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero__glow {
  position: absolute;
  top: -24%;
  right: -16%;
  width: min(680px, 78vw);
  aspect-ratio: 1 / 1;
  background: linear-gradient(142deg, var(--phantom) 0%, var(--shadow-purple) 60%, transparent 100%);
  clip-path: polygon(38% 0, 100% 0, 100% 100%, 0 74%);
  opacity: 0.4;
  pointer-events: none;
}

.page-faq .faq-hero__lines {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(90deg, rgba(142, 147, 168, 0.1) 0 1px, transparent 1px 92px);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.7), transparent 76%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.7), transparent 76%);
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(1.2rem, 3vw, 2rem);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.6rem, 4vw, 3rem);
}

.page-faq .faq-hero__copy .gs-lede {
  max-width: 48ch;
}

.page-faq .faq-hero__media {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  box-shadow: var(--glass-shadow);
}

/* ---------- 主体双栏 ---------- */
.page-faq .faq-main {
  padding-block: clamp(2.4rem, 6vw, 4.4rem);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.6rem, 3.5vw, 2.8rem);
}

/* ---------- 左侧分类索引 ---------- */
.page-faq .faq-index {
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.page-faq .faq-index__title {
  margin: 0 0 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
  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: 0.6rem;
  padding: 0.62rem 0.8rem;
  border: 1px solid transparent;
  border-radius: var(--radius-s);
  color: var(--mist);
  font-size: 0.92rem;
  line-height: 1.3;
  text-decoration: none;
  white-space: nowrap;
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .faq-index__link::before {
  content: "";
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--faq-dot);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-color: var(--line-strong);
  transform: translateX(4px);
}

.page-faq .faq-index__link--install { --faq-dot: var(--phantom); }
.page-faq .faq-index__link--data { --faq-dot: var(--lime); }
.page-faq .faq-index__link--account { --faq-dot: var(--yellow); }
.page-faq .faq-index__link--org { --faq-dot: var(--red); }
.page-faq .faq-index__link--feedback { --faq-dot: var(--steel); }

.page-faq:has(#install:target) .faq-index__link[href="#install"],
.page-faq:has(#data:target) .faq-index__link[href="#data"],
.page-faq:has(#account:target) .faq-index__link[href="#account"],
.page-faq:has(#org:target) .faq-index__link[href="#org"],
.page-faq:has(#feedback:target) .faq-index__link[href="#feedback"] {
  border-color: var(--faq-dot);
  background: rgba(122, 77, 255, 0.16);
}

.page-faq .faq-index__hint {
  margin: 0.9rem 0 0;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--steel);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-panels {
  min-width: 0;
}

.page-faq .faq-group {
  padding-block: clamp(1.6rem, 3.5vw, 2.6rem);
  border-top: 1px solid var(--line);
  scroll-margin-top: 88px;
}

.page-faq .faq-group:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-faq #install { --faq-dot: var(--phantom); }
.page-faq #data { --faq-dot: var(--lime); }
.page-faq #account { --faq-dot: var(--yellow); }
.page-faq #org { --faq-dot: var(--red); }
.page-faq #feedback { --faq-dot: var(--steel); }

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  color: var(--faq-dot);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.4rem, 3.4vw, 2.1rem);
  line-height: 1.02;
  letter-spacing: -0.015em;
  color: var(--mist);
}

.page-faq .faq-group__lede {
  margin: 0.7rem 0 1.2rem;
  max-width: 62ch;
  font-size: 0.96rem;
  line-height: 1.7;
  color: var(--steel);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 0;
}

.page-faq .gs-collapse {
  border-top: 1px solid var(--line);
}

.page-faq .faq-list .gs-collapse:last-child {
  border-bottom: 1px solid var(--line);
}

.page-faq .gs-collapse__toggle {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  padding: 1.05rem 0.2rem 1.05rem 1rem;
  background: none;
  border: 0;
  cursor: pointer;
  text-align: left;
  color: var(--mist);
  font-family: var(--font-body);
  font-size: clamp(1.02rem, 1.9vw, 1.2rem);
  font-weight: 600;
  line-height: 1.42;
  letter-spacing: -0.005em;
  transition: color 0.2s var(--ease);
}

.page-faq .gs-collapse__toggle::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 3px;
  height: 62%;
  border-radius: 3px;
  background: var(--lime);
  transform: translateY(-50%) scaleY(0);
  transform-origin: center;
  transition: transform 0.24s var(--ease);
}

.page-faq .gs-collapse__toggle[aria-expanded="true"]::before {
  transform: translateY(-50%) scaleY(1);
}

.page-faq .gs-collapse__toggle:hover .faq-sign {
  border-color: var(--phantom);
}

.page-faq .faq-sign {
  position: relative;
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  transition: border-color 0.2s var(--ease);
}

.page-faq .faq-sign::before,
.page-faq .faq-sign::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--mist);
  border-radius: 1px;
  transition: transform 0.24s var(--ease), background 0.2s var(--ease);
}

.page-faq .faq-sign::before {
  width: 10px;
  height: 2px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-sign::after {
  width: 2px;
  height: 10px;
  transform: translate(-50%, -50%);
}

.page-faq .gs-collapse__toggle[aria-expanded="true"] .faq-sign {
  border-color: var(--lime);
}

.page-faq .gs-collapse__toggle[aria-expanded="true"] .faq-sign::before {
  background: var(--lime);
}

.page-faq .gs-collapse__toggle[aria-expanded="true"] .faq-sign::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.page-faq .gs-collapse__panel {
  padding: 0 1.4rem 1.4rem 1rem;
  color: var(--steel);
  font-size: 1rem;
  line-height: 1.78;
}

.page-faq .gs-collapse__panel > * + * {
  margin-top: 0.85rem;
}

.page-faq .gs-collapse__panel p {
  margin: 0;
  max-width: 66ch;
}

.page-faq .gs-collapse__panel .gs-mono {
  color: var(--mist);
  font-size: 0.95em;
}

/* ---------- 编号步骤 ---------- */
.page-faq .faq-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: faqstep;
  display: grid;
  gap: 0.8rem;
}

.page-faq .faq-steps > li {
  display: grid;
  grid-template-columns: 2.8rem minmax(0, 1fr);
  gap: 0.5rem;
  align-items: start;
  counter-increment: faqstep;
}

.page-faq .faq-steps > li::before {
  content: counter(faqstep, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 1.5rem;
  line-height: 1.1;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

/* ---------- 组内配图 ---------- */
.page-faq .faq-group__media {
  margin: 1.6rem 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

/* ---------- 底部引导 ---------- */
.page-faq .faq-cta {
  position: relative;
  overflow: hidden;
}

.page-faq .faq-cta__inner {
  display: grid;
  gap: 0.9rem;
  max-width: 780px;
}

.page-faq .faq-cta .gs-title {
  color: var(--ink);
}

.page-faq .faq-cta__text {
  margin: 0;
  color: var(--ink);
  opacity: 0.82;
  font-size: 1.02rem;
  line-height: 1.75;
}

.page-faq .faq-cta .gs-btn--ghost {
  color: var(--ink);
  border-color: rgba(34, 27, 26, 0.4);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-group__media {
    max-width: 720px;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 92px;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    overflow: visible;
    gap: 0.35rem;
  }

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

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    transform: translateX(8px);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: center;
  }
}

@media (max-width: 979px) {
  .page-faq .faq-index__hint {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .gs-collapse__toggle,
  .page-faq .gs-collapse__toggle::before,
  .page-faq .faq-sign,
  .page-faq .faq-sign::before,
  .page-faq .faq-sign::after {
    transition: none;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    transform: none;
  }
}