.page-faq {
  --faq-rail: 218px;
  --faq-gap: clamp(28px, 4vw, 52px);
  padding-bottom: calc(var(--tabbar-h) + 28px);
  color: var(--stone);
}

@media (min-width: 1041px) {
  .page-faq {
    padding-bottom: 40px;
  }
}

.page-faq .crumbs {
  padding-top: 16px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  border-bottom: 1px solid var(--line);
  padding-bottom: clamp(26px, 4vw, 48px);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px 44px;
  align-items: end;
  padding-top: clamp(22px, 4vw, 52px);
}

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

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  max-width: 20ch;
  font-family: var(--ff-display);
  font-size: var(--fs-h1);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--white);
}

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

.page-faq .faq-hero__side p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--stone);
}

.page-faq .faq-hero__figure {
  margin: clamp(22px, 3.6vw, 40px) 0 0;
}

@media (min-width: 880px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.8fr);
  }

  .page-faq .faq-hero__side {
    border-left: 1px solid var(--line-2);
    padding-left: 22px;
  }
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  padding-top: clamp(30px, 5vw, 62px);
  padding-bottom: clamp(40px, 6vw, 84px);
}

@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: var(--faq-gap);
    align-items: start;
  }
}

/* ---------- 分组目录 ---------- */
.page-faq .faq-rail {
  border-top: 2px solid var(--green);
  padding-top: 14px;
  min-width: 0;
}

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  color: var(--mist);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  padding-bottom: 8px;
  scrollbar-width: thin;
}

.page-faq .faq-rail__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 10px;
  white-space: nowrap;
  text-decoration: none;
  color: var(--stone);
  font-size: 15px;
  line-height: 1.4;
  border-bottom: 2px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-faq .faq-rail__list a .idx {
  color: var(--mist);
  transition: color 0.2s var(--ease);
}

.page-faq .faq-rail__list a:hover,
.page-faq .faq-rail__list a:focus-visible {
  color: var(--white);
  border-bottom-color: var(--green);
  background: var(--ink-2);
}

.page-faq .faq-rail__list a:hover .idx,
.page-faq .faq-rail__list a:focus-visible .idx {
  color: var(--green);
}

.page-faq .faq-rail__note {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

@media (min-width: 1000px) {
  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--head-h) + 18px);
  }

  .page-faq .faq-rail__list {
    display: grid;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__list a {
    border-bottom: 0;
    border-left: 2px solid transparent;
    padding: 8px 10px 8px 12px;
  }

  .page-faq .faq-rail__list a:hover,
  .page-faq .faq-rail__list a:focus-visible {
    border-bottom-color: transparent;
    border-left-color: var(--green);
  }
}

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

.page-faq .faq-group {
  scroll-margin-top: calc(var(--head-h) + 18px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(36px, 5vw, 64px);
}

.page-faq .faq-group__head {
  border-left: 2px solid var(--line-2);
  padding-left: 14px;
}

.page-faq .faq-group__head h2 {
  margin: 12px 0 8px;
  font-family: var(--ff-display);
  font-size: var(--fs-h2);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-group__intro {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-items {
  margin-top: 16px;
  border-top: 1px solid var(--line);
}

/* ---------- 单条问答 ---------- */
.page-faq .qa {
  border-bottom: 1px solid var(--line);
  border-left: 2px solid transparent;
  transition: border-color 0.2s var(--ease), background-color 0.24s var(--ease);
}

.page-faq .qa[open] {
  border-left-color: var(--green);
  background: linear-gradient(90deg, rgba(43, 240, 138, 0.06), rgba(43, 240, 138, 0) 62%);
}

.page-faq .qa__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px 14px;
  padding: 16px 14px 16px 12px;
  cursor: pointer;
  list-style: none;
  color: var(--white);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.5;
}

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

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: -2px;
}

.page-faq .qa__no {
  font-family: var(--ff-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
  color: var(--mist);
  transition: color 0.2s var(--ease);
}

.page-faq .qa[open] .qa__no {
  color: var(--green);
}

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

.page-faq .qa__icon {
  width: 16px;
  height: 16px;
  flex: none;
  color: var(--mist);
  transition: transform 0.24s var(--ease), color 0.24s var(--ease);
}

.page-faq .qa[open] .qa__icon {
  transform: rotate(180deg);
  color: var(--green);
}

.page-faq .qa__a {
  padding: 0 16px 18px 44px;
  border-top: 1px solid rgba(126, 140, 166, 0.12);
  margin-top: 2px;
}

.page-faq .qa__a p {
  margin: 12px 0 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--stone);
}

@media (max-width: 520px) {
  .page-faq .qa__q {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 8px 10px;
    padding: 14px 12px 14px 10px;
    font-size: 15px;
  }

  .page-faq .qa__icon {
    grid-column: 1 / -1;
    justify-self: end;
    width: 14px;
    height: 14px;
  }

  .page-faq .qa__a {
    padding: 0 12px 16px 34px;
  }
}

/* ---------- 排错配图 ---------- */
.page-faq .faq-figure {
  position: relative;
  margin: 20px 0 22px;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line);
}

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

.page-faq .faq-figure figcaption {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 6px 12px;
  background: rgba(7, 11, 20, 0.86);
  color: var(--mist);
  font-size: 12px;
  letter-spacing: 0.02em;
}

/* ---------- 几何网格叠加 ---------- */
.page-faq .figure__grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(126, 140, 166, 0.18) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(126, 140, 166, 0.18) 1px, transparent 1px);
  background-size: 72px 72px;
}

/* ---------- 底部入口 ---------- */
.page-faq .faq-support {
  margin-top: clamp(34px, 4.6vw, 58px);
  padding-top: 20px;
  border-top: 2px solid var(--green);
  display: grid;
  gap: 14px;
}

.page-faq .faq-support p {
  margin: 0;
  font-size: 15px;
  color: var(--mist);
}

.page-faq .faq-support__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}