.page-faq {
  --faq-rail-w: 208px;
  --faq-indent: clamp(0.75rem, 4vw, 2.3rem);
  display: block;
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(2rem, 5vw, 3.5rem) 0 clamp(2.5rem, 6vw, 4.5rem);
  background:
    radial-gradient(120% 90% at 88% 6%, rgba(38, 240, 208, 0.18), transparent 60%),
    var(--deep);
  color: var(--white);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--gold));
  opacity: 0.72;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 2.25rem;
  align-items: start;
}

.page-faq .faq-hero .crumbs {
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: rgba(251, 250, 247, 0.55);
}

.page-faq .faq-hero .crumbs a {
  color: var(--cyan-soft);
  text-decoration: none;
}

.page-faq .faq-hero .crumbs a:hover {
  color: var(--white);
}

.page-faq .faq-hero .index-tag {
  display: block;
  margin-top: 1.5rem;
  color: var(--cyan);
}

.page-faq .faq-hero__title {
  display: grid;
  gap: 0.4rem;
  margin: 0.7rem 0 0;
}

.page-faq .faq-hero__title-main {
  font-size: clamp(2.4rem, 8vw, 4.4rem);
  font-weight: 300;
  line-height: 1.04;
  letter-spacing: 0.01em;
}

.page-faq .faq-hero__title-sub {
  font-size: clamp(1rem, 3vw, 1.35rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--cyan-soft);
}

.page-faq .faq-hero__lede {
  margin-top: 1.25rem;
  max-width: 46ch;
  color: rgba(251, 250, 247, 0.82);
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 2.25rem;
  margin: 1.75rem 0 0;
  padding: 1.1rem 0 0;
  border-top: 1px solid var(--line-dark);
  list-style: none;
}

.page-faq .faq-hero__stats li {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: rgba(251, 250, 247, 0.68);
}

.page-faq .faq-hero__k {
  font-size: 1.4rem;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-hero__figure {
  margin: 0;
  border: 1px solid var(--line-dark-strong);
  background: var(--panel);
}

.page-faq .faq-hero__figure .figure__cap {
  display: block;
  padding: 0.7rem 0.85rem;
  border-top: 1px solid var(--line-dark);
  font-size: 0.74rem;
  letter-spacing: 0.05em;
  color: rgba(251, 250, 247, 0.6);
}

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

/* ============ 通用排版 ============ */
.page-faq .faq-h2 {
  margin: 0.55rem 0 0;
  font-size: clamp(1.28rem, 3.4vw, 1.85rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

/* ============ 问题索引区 ============ */
.page-faq .faq-index {
  padding: clamp(2.5rem, 6vw, 4rem) 0;
  background: var(--paper);
  color: var(--text-dark);
}

.page-faq .faq-index__grid {
  display: grid;
  gap: 2.25rem;
  align-items: start;
}

.page-faq .faq-index__note {
  margin: 0.8rem 0 0;
  max-width: 48ch;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-search {
  margin-top: 1.6rem;
}

.page-faq .faq-search__label {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-faq .faq-search__input {
  width: 100%;
  max-width: 22rem;
  padding: 0.7rem 0.85rem;
  background: var(--white);
  border: 1px solid var(--line-light);
  border-radius: var(--radius);
  color: var(--text-dark);
  font-family: var(--font-body);
  font-size: 0.92rem;
}

.page-faq .faq-search__input:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 2px rgba(38, 240, 208, 0.28);
}

.page-faq .filter__empty {
  margin: 0.6rem 0 0;
  font-size: 0.84rem;
  color: var(--alert);
}

.page-faq .faq-cats {
  display: grid;
  gap: 1px;
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-light);
  border: 1px solid var(--line-light);
}

.page-faq .faq-cats__item {
  background: var(--paper);
}

.page-faq .faq-cats__link {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.3rem 0.9rem;
  padding: 0.95rem 1rem;
  border-left: 2px solid transparent;
  color: var(--text-dark);
  text-decoration: none;
  transition: border-color 180ms var(--ease), background 180ms var(--ease);
}

.page-faq .faq-cats__link:hover,
.page-faq .faq-cats__link:focus-visible {
  border-left-color: var(--cyan);
  background: var(--white);
}

.page-faq .faq-cats__num {
  font-size: 1.05rem;
  color: var(--muted);
}

.page-faq .faq-cats__name {
  font-size: 1rem;
  font-weight: 700;
}

.page-faq .faq-cats__desc {
  grid-column: 2;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--muted);
}

.page-faq .faq-index__figure {
  margin: 0;
  border: 1px solid var(--line-light);
  background: var(--white);
}

.page-faq .faq-index__figure .figure__cap {
  display: block;
  padding: 0.7rem 0.85rem;
  border-top: 1px solid var(--line-light);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ============ 问答主体 ============ */
.page-faq .faq-groups {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0;
  background: var(--deep);
  color: var(--white);
}

.page-faq .faq-groups__grid {
  display: grid;
  gap: 2rem;
  align-items: start;
}

.page-faq .faq-rail {
  border-left: 1px solid var(--line-dark);
  padding-left: 1rem;
}

.page-faq .faq-rail .index-tag {
  color: rgba(251, 250, 247, 0.45);
}

.page-faq .faq-rail__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.75rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-rail__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 0.6rem 0.5rem 0.9rem;
  border-radius: var(--radius);
  color: rgba(251, 250, 247, 0.72);
  font-size: 0.88rem;
  text-decoration: none;
  transition: color 180ms var(--ease);
}

.page-faq .faq-rail__bar {
  position: absolute;
  left: 0;
  top: 50%;
  width: 2px;
  height: 0;
  background: var(--cyan);
  transform: translateY(-50%);
  transition: height 180ms var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible,
.page-faq .faq-rail__link.is-active {
  color: var(--cyan-soft);
}

.page-faq .faq-rail__link:hover .faq-rail__bar,
.page-faq .faq-rail__link:focus-visible .faq-rail__bar,
.page-faq .faq-rail__link.is-active .faq-rail__bar {
  height: 1.15rem;
}

.page-faq .faq-rail__num {
  font-size: 0.78rem;
  color: var(--muted);
}

.page-faq .faq-flow {
  display: grid;
  gap: clamp(2.25rem, 5vw, 3.25rem);
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--statusbar-h) + 1.5rem);
}

.page-faq .faq-group__head {
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--line-dark-strong);
}

.page-faq .faq-group__head .index-tag {
  color: var(--cyan);
}

.page-faq .faq-group__note {
  margin: 0.7rem 0 0;
  max-width: 54ch;
  font-size: 0.9rem;
  line-height: 1.75;
  color: rgba(251, 250, 247, 0.64);
}

/* 手风琴 */
.page-faq .faq-accordion {
  margin-top: 1rem;
}

.page-faq .accordion__item {
  border-bottom: 1px solid var(--line-dark);
}

.page-faq .accordion__trigger {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.9rem;
  width: 100%;
  padding: 1.05rem 0.35rem;
  background: none;
  border: 0;
  color: var(--white);
  font-family: var(--font-body);
  font-size: 1rem;
  text-align: left;
  cursor: pointer;
  transition: color 180ms var(--ease);
}

.page-faq .accordion__trigger[aria-expanded="true"] {
  color: var(--cyan-soft);
}

.page-faq .accordion__trigger:hover .faq-q__text,
.page-faq .accordion__trigger:focus-visible .faq-q__text {
  color: var(--cyan-soft);
}

.page-faq .faq-q__num {
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-q__text {
  font-weight: 600;
  line-height: 1.5;
  transition: color 180ms var(--ease);
}

.page-faq .accordion__icon {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
}

.page-faq .accordion__icon::before,
.page-faq .accordion__icon::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform 180ms var(--ease), opacity 180ms var(--ease);
}

.page-faq .accordion__icon::before {
  left: 0;
  right: 0;
  top: 50%;
  height: 1.5px;
  margin-top: -0.75px;
}

.page-faq .accordion__icon::after {
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1.5px;
  margin-left: -0.75px;
}

.page-faq .accordion__trigger[aria-expanded="true"] .accordion__icon::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .accordion__panel-inner {
  padding: 0 0 1.3rem var(--faq-indent);
  border-top: 1px dashed var(--line-dark);
}

.page-faq .accordion__panel-inner p {
  margin: 0.9rem 0 0;
  max-width: 62ch;
  font-size: 0.92rem;
  line-height: 1.85;
  color: rgba(251, 250, 247, 0.78);
}

.page-faq .accordion__panel-inner a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .accordion__panel-inner a:hover {
  color: var(--gold);
}

.page-faq .accordion__item.is-hidden,
.page-faq .faq-group.is-hidden {
  display: none;
}

/* ============ 人工通道 ============ */
.page-faq .faq-contact {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0;
  background: var(--paper);
  color: var(--text-dark);
}

.page-faq .faq-contact__grid {
  display: grid;
  gap: 2.25rem;
  align-items: start;
}

.page-faq .faq-contact .index-tag {
  color: var(--muted);
}

.page-faq .faq-contact__lede {
  margin: 0.85rem 0 0;
  max-width: 44ch;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.page-faq .faq-contact__cards {
  display: grid;
  gap: 1px;
  background: var(--line-light);
  border: 1px solid var(--line-light);
}

.page-faq .faq-contact__card {
  padding: 1.35rem 1.25rem;
  background: var(--white);
}

.page-faq .faq-contact__val {
  margin: 0.5rem 0 0.9rem;
  font-size: 1rem;
  line-height: 1.6;
  word-break: break-all;
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-contact__note {
  margin: 0.85rem 0 0;
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-contact__card--wide {
  grid-column: 1 / -1;
}

/* ============ 响应式 ============ */
@media (min-width: 640px) {
  .page-faq .faq-cats {
    grid-template-columns: 1fr 1fr;
  }

  .page-faq .faq-contact__cards {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 3.25rem;
  }

  .page-faq .faq-index__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 3.25rem;
  }

  .page-faq .faq-contact__grid {
    grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
    gap: 3.25rem;
  }

  .page-faq .faq-hero__figure {
    margin-top: 1.5rem;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-groups__grid {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 3.5rem;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--statusbar-h) + 2rem);
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 0.15rem;
    margin-top: 1.15rem;
  }

  .page-faq .faq-rail__link {
    padding-right: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .accordion__icon::before,
  .page-faq .accordion__icon::after,
  .page-faq .accordion__trigger,
  .page-faq .faq-q__text,
  .page-faq .faq-rail__bar,
  .page-faq .faq-cats__link {
    transition: none;
  }
}