.page-faq {
  --faq-hero-ink: #16211D;
  --faq-hero-muted: #46564F;
  --faq-dark-line: rgba(159, 183, 176, 0.22);
  --faq-dark-line-soft: rgba(159, 183, 176, 0.14);
  display: block;
  background: var(--sig-ink);
  color: var(--sig-body);
  font-family: var(--sig-sans);
}

/* ---------- 首屏：暖纸色问答索引 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--sig-paper);
  color: var(--sig-ink-text);
  padding: clamp(88px, 10vw, 108px) 0 clamp(38px, 6vw, 74px);
  border-bottom-left-radius: clamp(36px, 9vw, 120px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -90px;
  width: clamp(220px, 38vw, 420px);
  aspect-ratio: 1;
  border-radius: 46% 54% 38% 62% / 52% 42% 58% 48%;
  background: radial-gradient(circle at 38% 36%, rgba(53, 242, 208, 0.5), rgba(53, 242, 208, 0) 70%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: -8%;
  bottom: -70px;
  width: 46%;
  height: 130px;
  border-radius: 50% 60% 40% 55% / 60% 40% 55% 45%;
  background: var(--sig-orange);
  opacity: 0.1;
  transform: rotate(-6deg);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 40px);
}

.page-faq .faq-hero__copy {
  min-width: 0;
}

.page-faq .faq-hero .sig-eyebrow {
  color: var(--sig-cyan-deep);
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-size: clamp(30px, 7.6vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  font-weight: 900;
  color: var(--sig-ink-text);
}

.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: clamp(15px, 1.7vw, 17.5px);
  line-height: 1.9;
  color: var(--faq-hero-muted);
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  max-width: 540px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__stat {
  padding-top: 10px;
  border-top: 2px solid rgba(22, 33, 29, 0.18);
  min-width: 0;
}

.page-faq .faq-hero__statnum {
  display: block;
  font-family: var(--sig-mono);
  font-size: clamp(15px, 4vw, 24px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--sig-ink-text);
}

.page-faq .faq-hero__statlabel {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.05em;
  color: var(--faq-hero-muted);
}

.page-faq .faq-hero__media {
  margin: 0;
  aspect-ratio: 3 / 2;
  border-radius: 16px 16px 16px 56px;
  overflow: hidden;
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 44px);
  max-width: 100%;
  padding-top: clamp(40px, 7vw, 80px);
  padding-bottom: clamp(48px, 8vw, 96px);
  overflow-x: hidden;
}

.page-faq .faq-index {
  min-width: 0;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--sig-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--sig-muted);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  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 14px;
  border: 1px solid rgba(159, 183, 176, 0.28);
  border-radius: var(--sig-radius-pill);
  color: var(--sig-body);
  font-size: 13px;
  line-height: 1.3;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.18s var(--sig-ease), color 0.18s var(--sig-ease), background-color 0.18s var(--sig-ease);
}

.page-faq .faq-index__num {
  font-family: var(--sig-mono);
  font-size: 11px;
  color: var(--sig-cyan);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-color: var(--sig-cyan);
  color: var(--sig-cyan);
  background: var(--sig-cyan-dim);
  outline: none;
}

.page-faq .faq-sections {
  min-width: 0;
}

/* ---------- 分组标题 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 108px;
  padding-top: clamp(28px, 5vw, 42px);
  border-top: 1px solid var(--faq-dark-line);
}

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

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
}

.page-faq .faq-group__index {
  font-family: var(--sig-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--sig-cyan);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(20px, 3.6vw, 30px);
  line-height: 1.28;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--sig-body);
}

.page-faq .faq-group__note {
  margin: 8px 0 0;
  max-width: 40em;
  font-size: 14px;
  line-height: 1.8;
  color: var(--sig-muted);
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-list {
  margin: 14px 0 0;
  border-top: 1px solid var(--faq-dark-line-soft);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-dark-line-soft);
  border-left: 3px solid transparent;
  padding-left: 14px;
  transition: border-color 0.2s var(--sig-ease);
}

.page-faq .faq-item[open] {
  border-left-color: var(--sig-cyan);
}

.page-faq .faq-item__q {
  position: relative;
  display: block;
  padding: 18px 42px 18px 0;
  cursor: pointer;
  font-size: clamp(15px, 2vw, 17px);
  line-height: 1.65;
  font-weight: 600;
  color: var(--sig-body);
  transition: color 0.18s var(--sig-ease);
}

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

.page-faq .faq-item__q::marker {
  content: "";
}

.page-faq .faq-item__q:hover {
  color: var(--sig-cyan);
}

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--sig-cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

.page-faq .faq-item__q::after {
  content: "";
  position: absolute;
  right: 12px;
  top: 24px;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--sig-muted);
  border-bottom: 2px solid var(--sig-muted);
  transform: rotate(45deg);
  transition: transform 0.2s var(--sig-ease), border-color 0.2s var(--sig-ease);
}

.page-faq .faq-item[open] .faq-item__q::after {
  border-color: var(--sig-cyan);
  transform: rotate(-135deg);
}

.page-faq .faq-item__a {
  padding: 0 34px 20px 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--sig-muted);
}

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

.page-faq .faq-item__a p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-link {
  color: var(--sig-cyan);
  text-decoration: underline;
  text-decoration-color: var(--sig-cyan-soft);
  text-underline-offset: 3px;
}

.page-faq .faq-link:hover,
.page-faq .faq-link:focus-visible {
  text-decoration-color: var(--sig-cyan);
  outline: none;
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 28px 0 0;
}

.page-faq .faq-figure .sig-media {
  border-radius: 14px;
  overflow: hidden;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-faq .faq-figure__cap {
  margin-top: 11px;
  padding-left: 12px;
  border-left: 2px solid var(--sig-cyan-soft);
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--sig-muted);
}

/* ---------- 页尾色块带 ---------- */
.page-faq .faq-cta {
  position: relative;
  background: var(--sig-carbon);
  border-top: 1px solid rgba(53, 242, 208, 0.28);
  border-bottom: 1px solid rgba(53, 242, 208, 0.28);
  padding: clamp(26px, 5vw, 42px) 0;
}

.page-faq .faq-cta::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--sig-cyan), var(--sig-orange) 52%, var(--sig-violet));
}

.page-faq .faq-cta__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px 30px;
}

.page-faq .faq-cta__text {
  min-width: 0;
}

.page-faq .faq-cta .sig-eyebrow {
  color: var(--sig-cyan);
}

.page-faq .faq-cta__title {
  margin: 8px 0 0;
  max-width: 30em;
  font-size: clamp(19px, 3.2vw, 26px);
  line-height: 1.38;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--sig-body);
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: end;
    gap: clamp(32px, 5vw, 64px);
  }

  .page-faq .faq-body {
    grid-template-columns: 212px minmax(0, 1fr);
    gap: clamp(40px, 5vw, 76px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 104px;
    align-self: start;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

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

  .page-faq .faq-index__link {
    display: flex;
    padding: 10px 0 10px 16px;
    border: 0;
    border-left: 2px solid rgba(159, 183, 176, 0.28);
    border-radius: 0;
    background: none;
    white-space: normal;
    font-size: 14px;
    line-height: 1.5;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    border-left-color: var(--sig-cyan);
    background: none;
    color: var(--sig-cyan);
  }

  .page-faq .faq-item__a {
    max-width: 44em;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-body {
    grid-template-columns: 232px minmax(0, 1fr);
  }
}

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