.page-faq {
  background: var(--ink);
  color: var(--paper);
  padding-bottom: 72px;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-block: 22px 10px;
  font-size: 13px;
  letter-spacing: 0.04em;
  font-family: var(--font-mono);
}

.page-faq .breadcrumb__item {
  color: var(--muted);
  text-decoration: none;
}

.page-faq a.breadcrumb__item {
  transition: color 0.25s var(--ease);
}

.page-faq a.breadcrumb__item:hover,
.page-faq a.breadcrumb__item:focus-visible {
  color: var(--cyan);
}

.page-faq .breadcrumb__sep {
  color: var(--cyan-dim);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: 32px;
  padding-top: 14px;
}

.page-faq .faq-hero__plate {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin: 0;
  padding: 7px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: var(--ink-2);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.page-faq .faq-hero__plate .plate__label {
  color: var(--cyan);
}

.page-faq .faq-hero__plate .plate__value {
  color: var(--muted);
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
}

.page-faq .faq-hero h1 {
  margin: 18px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 8vw, 66px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--paper);
  max-width: 20ch;
}

.page-faq .faq-hero__lede {
  margin: 20px 0 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 30px;
  background: var(--ink-2);
}

.page-faq .faq-jump a {
  display: inline-block;
  padding: 8px 15px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-size: 13px;
  line-height: 1.4;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.25s var(--ease), background 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .faq-hero__figure {
  margin: 0;
}

.page-faq .faq-hero__figure img {
  display: block;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  object-fit: cover;
}

.page-faq .faq-hero__caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 主体网格 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: 32px;
  padding-top: 50px;
}

/* ---------- 左侧分类索引 ---------- */
.page-faq .faq-rail__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--cyan-dim);
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .faq-rail__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-rail__list li {
  flex: none;
}

.page-faq .faq-rail__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 15px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: var(--ink-2);
  font-size: 13px;
  line-height: 1.4;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), background 0.25s var(--ease);
}

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

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

/* ---------- 问题分组 ---------- */
.page-faq .faq-group + .faq-group {
  margin-top: 56px;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__no {
  flex: none;
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 21px;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-group__note {
  margin: 14px 0 20px;
  max-width: 54ch;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 图例 ---------- */
.page-faq .faq-legend {
  display: grid;
  gap: 14px;
  margin: 0 0 20px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--ink-2);
}

.page-faq .faq-legend__item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.page-faq .faq-legend__swatch {
  flex: none;
  width: 14px;
  height: 26px;
  margin-top: 2px;
  border-radius: 5px;
}

.page-faq .faq-legend__swatch--yellow {
  background: var(--warn);
}

.page-faq .faq-legend__swatch--red {
  background: var(--red);
}

.page-faq .faq-legend__swatch--ghost {
  background: transparent;
  border: 1px dashed var(--cyan);
}

.page-faq .faq-legend__name {
  margin: 0;
  font-size: 14px;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-legend__desc {
  margin: 4px 0 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 问答卡 ---------- */
.page-faq .faq-card {
  background: var(--paper);
  color: var(--ink-2);
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  transition: border-color 0.25s var(--ease);
}

.page-faq .faq-card + .faq-card {
  margin-top: 12px;
}

.page-faq .faq-card:hover {
  border-color: var(--cyan);
}

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

.page-faq .faq-card__q {
  position: relative;
  display: flex;
  gap: 12px;
  padding: 17px 54px 17px 20px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15.5px;
  line-height: 1.5;
  color: var(--ink-2);
  cursor: pointer;
  list-style: none;
  border-radius: var(--radius-lg);
}

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

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

.page-faq .faq-card__num {
  flex: none;
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan-dim);
}

.page-faq .faq-card__q::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 18px;
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  transform: translateY(-50%);
  border: 1px solid rgba(7, 28, 24, 0.2);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1;
  color: var(--cyan-dim);
  transition: background 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-faq .faq-card[open] .faq-card__q::after {
  content: "−";
  background: var(--cyan-dim);
  border-color: var(--cyan-dim);
  color: var(--paper);
}

.page-faq .faq-card__a {
  padding: 0 20px 20px 47px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-2);
}

.page-faq .faq-card__a p {
  margin: 0;
}

.page-faq .faq-card__a p + p {
  margin-top: 10px;
}

.page-faq .faq-card__a strong {
  font-weight: 700;
  color: var(--cyan-dim);
}

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

.page-faq .faq-card__a a:hover,
.page-faq .faq-card__a a:focus-visible {
  color: var(--ink);
}

/* ---------- 深色分组（移动端阅读） ---------- */
.page-faq .faq-group--dark .faq-card {
  background: var(--ink-2);
  border-color: var(--line);
}

.page-faq .faq-group--dark .faq-card:hover,
.page-faq .faq-group--dark .faq-card[open] {
  border-color: var(--cyan);
}

.page-faq .faq-group--dark .faq-card__q {
  color: var(--paper);
}

.page-faq .faq-group--dark .faq-card__num {
  color: var(--cyan);
}

.page-faq .faq-group--dark .faq-card__q::after {
  border-color: rgba(140, 247, 231, 0.38);
  color: var(--cyan-soft);
}

.page-faq .faq-group--dark .faq-card[open] .faq-card__q::after {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink);
}

.page-faq .faq-group--dark .faq-card__a {
  color: var(--muted);
}

.page-faq .faq-group--dark .faq-card__a strong {
  color: var(--cyan-soft);
}

/* ---------- 示意图 ---------- */
.page-faq .faq-figure {
  margin: 24px 0 0;
}

.page-faq .faq-figure img {
  display: block;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 联系 CTA ---------- */
.page-faq .faq-cta {
  display: grid;
  gap: 20px;
  padding: 26px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--ink-2) 0%, var(--ink) 90%);
}

.page-faq .faq-cta__text {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 窄屏收敛 ---------- */
@media (max-width: 560px) {
  .page-faq .faq-card__q {
    padding: 15px 50px 15px 16px;
    font-size: 15px;
  }

  .page-faq .faq-card__a {
    padding: 0 16px 18px 16px;
  }

  .page-faq .faq-jump {
    padding: 8px;
    border-radius: 24px;
  }

  .page-faq .faq-jump a {
    padding: 7px 12px;
    font-size: 12.5px;
  }

  .page-faq .faq-hero__lede {
    font-size: 14.5px;
  }
}

/* ---------- 宽屏布局 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-group__title {
    font-size: 26px;
  }

  .page-faq .faq-group__no {
    font-size: 32px;
  }

  .page-faq .faq-legend {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-faq .faq-card__q {
    font-size: 17px;
    padding: 19px 58px 19px 24px;
  }

  .page-faq .faq-card__a {
    padding: 0 24px 22px 51px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: end;
    gap: 52px;
    padding-top: 26px;
  }

  .page-faq .faq-hero__copy {
    padding-bottom: 8px;
  }

  .page-faq .faq-hero__lede {
    font-size: 16px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: 224px minmax(0, 1fr);
    gap: 60px;
    align-items: start;
    padding-top: 66px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 96px;
  }

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

  .page-faq .faq-rail__list a {
    display: flex;
    width: 100%;
    padding: 10px 12px 10px 14px;
    border: none;
    border-left: 2px solid var(--line);
    border-radius: 0;
    background: none;
    white-space: normal;
  }

  .page-faq .faq-rail__list a:hover,
  .page-faq .faq-rail__list a:focus-visible {
    border-left-color: var(--cyan);
    background: linear-gradient(90deg, rgba(0, 229, 195, 0.12), rgba(0, 229, 195, 0) 85%);
  }

  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 30px 28px;
  }
}