/* ===== 帮助中心 / 问答流布局 ===== */
.page-faq {
  --faq-rule: 1px solid var(--c-line);
  padding-bottom: clamp(56px, 8vw, 96px);
}

/* ---- 页首 ---- */
.page-faq .faq-hero {
  margin-bottom: clamp(30px, 5vw, 56px);
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -.03em;
  font-size: clamp(34px, 7.5vw, 66px);
  line-height: 1.04;
  margin: 12px 0 0;
  color: var(--c-text);
}

.page-faq .faq-hero__lede {
  max-width: 60ch;
  margin: 20px 0 0;
  font-size: 17px;
  line-height: 1.75;
  color: var(--c-muted);
}

.page-faq .faq-meta {
  list-style: none;
  margin: 26px 0 0;
  padding: 16px 0 0;
  border-top: var(--faq-rule);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
}

.page-faq .faq-meta li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-faq .faq-meta__k {
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--c-dim);
}

.page-faq .faq-meta__v {
  font-family: var(--font-data);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  color: var(--c-text);
}

/* ---- 布局：索引 + 问答 ---- */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
}

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

/* ---- 分类索引 ---- */
.page-faq .faq-index {
  min-width: 0;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  color: var(--c-dim);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 2px 0 8px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
}

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

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: var(--faq-rule);
  color: var(--c-muted);
  text-decoration: none;
  font-size: 13px;
  line-height: 1;
  white-space: nowrap;
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--c-text);
  border-color: var(--c-cyan);
}

.page-faq .faq-index__num {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--c-cyan);
}

/* ---- 分组 ---- */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--bar-h) + 24px);
  padding-bottom: clamp(36px, 6vw, 68px);
}

.page-faq .faq-group__head {
  margin-bottom: 20px;
}

.page-faq .faq-group__head h2 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -.02em;
  font-size: clamp(22px, 3.6vw, 36px);
  line-height: 1.18;
  margin: 10px 0 0;
  color: var(--c-text);
}

.page-faq .faq-group__lede {
  max-width: 58ch;
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-muted);
}

/* ---- 图示 ---- */
.page-faq .faq-figure {
  margin: 0 0 24px;
  border: var(--faq-rule);
  background: var(--c-deep);
  overflow: hidden;
}

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

.page-faq .rank-visual {
  display: grid;
  gap: 18px;
  margin: 22px 0 28px;
}

.page-faq .rank-chart {
  min-width: 0;
  border: var(--faq-rule);
  background: var(--c-deep);
  padding: 14px 16px;
}

.page-faq .rank-chart svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .rank-photo {
  margin: 0;
  border: var(--faq-rule);
  overflow: hidden;
  max-width: 260px;
}

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

/* ---- 手风琴 ---- */
.page-faq .faq-list {
  border-top: var(--faq-rule);
}

.page-faq .faq-item {
  border-bottom: var(--faq-rule);
  transition: background-color .2s var(--ease), box-shadow .2s var(--ease);
}

.page-faq .faq-item[open] {
  box-shadow: inset 2px 0 0 var(--c-cyan);
  background: linear-gradient(90deg, rgba(53, 230, 210, .06), rgba(53, 230, 210, 0) 58%);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 14px 18px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  line-height: 1.6;
  color: var(--c-text);
  transition: color .18s var(--ease);
}

.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item > summary::marker {
  content: "";
}

.page-faq .faq-item > summary:hover {
  color: var(--c-cyan);
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: -2px;
}

.page-faq .faq-item > summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-data);
  font-size: 17px;
  line-height: 1.5;
  color: var(--c-dim);
  transition: color .18s var(--ease);
}

.page-faq .faq-item[open] > summary::after {
  content: "−";
  color: var(--c-cyan);
}

.page-faq .faq-a {
  max-width: 64ch;
  padding: 0 16px 22px;
}

.page-faq .faq-a p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
}

.page-faq .faq-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  padding-bottom: 2px;
  font-size: 13px;
  letter-spacing: .03em;
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 230, 210, .35);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-faq .faq-more::after {
  content: "→";
  transition: transform .2s var(--ease);
}

.page-faq .faq-more:hover {
  color: var(--c-text);
  border-bottom-color: var(--c-text);
}

.page-faq .faq-more:hover::after {
  transform: translateX(4px);
}

/* ---- 结尾引导块 ---- */
.page-faq .faq-group--more {
  border: var(--faq-rule);
  border-left: 3px solid var(--c-cyan);
  background: linear-gradient(135deg, rgba(53, 230, 210, .08), rgba(11, 15, 14, 0) 62%), var(--c-deep);
  padding: clamp(24px, 4vw, 40px);
  padding-bottom: clamp(26px, 4vw, 42px);
}

.page-faq .faq-group--more h2 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -.02em;
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1.2;
  margin: 10px 0 0;
  color: var(--c-text);
}

.page-faq .faq-group--more p {
  max-width: 56ch;
  margin: 16px 0 24px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
}

/* ---- 平板及以上 ---- */
@media (min-width: 720px) {
  .page-faq .rank-visual {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: start;
    gap: 22px;
  }

  .page-faq .rank-photo {
    max-width: none;
  }

  .page-faq .rank-photo img {
    max-height: 300px;
    object-fit: cover;
  }

  .page-faq .faq-item > summary {
    padding: 20px 16px;
    font-size: 17px;
  }
}

/* ---- 桌面：固定侧索引 ---- */
@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: clamp(40px, 5vw, 72px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--bar-h) + 32px);
    align-self: start;
  }

  .page-faq .faq-index__list {
    display: block;
    overflow: visible;
    padding: 0;
  }

  .page-faq .faq-index__list li + li {
    margin-top: 2px;
  }

  .page-faq .faq-index__link {
    display: flex;
    width: 100%;
    box-sizing: border-box;
    border: 0;
    border-left: 2px solid var(--c-line);
    padding: 10px 0 10px 14px;
    white-space: normal;
  }

  .page-faq .faq-index__link:hover {
    border-left-color: var(--c-cyan);
    background: rgba(53, 230, 210, .05);
  }
}

/* ---- 降低动态效果 ---- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-index__link,
  .page-faq .faq-item > summary,
  .page-faq .faq-item > summary::after,
  .page-faq .faq-more,
  .page-faq .faq-more::after {
    transition: none;
  }

  .page-faq .faq-more:hover::after {
    transform: none;
  }
}