.page-faq {
  --faq-scroll: 96px;
  --faq-tip-border: rgba(47, 230, 200, .45);
  padding-bottom: 80px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: 20px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 34px;
}

.page-faq .faq-hero .eyebrow {
  margin: 0;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(34px, 9.5vw, 60px);
  line-height: 1.06;
  letter-spacing: -.5px;
  color: var(--paper);
  margin: 12px 0 18px;
  max-width: 15ch;
}

.page-faq .faq-hero .lead {
  max-width: 62ch;
  margin: 0 0 30px;
  font-size: 17px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 顶部索引带 ---------- */
.page-faq .faq-index {
  display: grid;
  gap: 26px;
  border-top: 3px solid var(--line-strong);
  padding-top: 26px;
  margin-bottom: 8px;
}

.page-faq .faq-index__title {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: .08em;
  color: var(--cyan);
}

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

.page-faq .faq-pill {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 14px;
  background: var(--ink-800);
  border: 2px solid var(--line-strong);
  color: var(--paper);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: border-color var(--ease), color var(--ease), transform var(--ease), background-color var(--ease);
}

.page-faq .faq-pill .num {
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-faq .faq-pill:hover,
.page-faq .faq-pill:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  transform: translate(-2px, -2px);
}

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

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

/* ---------- 媒体框 ---------- */
.page-faq .media-frame {
  border: 3px solid var(--line-strong);
  background: var(--ink-800);
  box-shadow: var(--shadow-hard);
  max-width: 100%;
}

.page-faq .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.72);
}

.page-faq .media-frame__caption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  background: var(--ink-900);
  color: var(--mist);
  font-size: 13px;
  line-height: 1.6;
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  border-top: 3px solid var(--line-strong);
  padding-top: 26px;
  margin-top: 56px;
  scroll-margin-top: var(--faq-scroll);
  transition: border-color var(--ease);
}

.page-faq .faq-group:target {
  border-top-color: var(--cyan);
}

.page-faq .faq-group:target .faq-group__num {
  background: var(--cyan);
  color: var(--ink-000);
  border-color: var(--cyan);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 10px;
}

.page-faq .faq-group__num {
  flex: 0 0 auto;
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--cyan);
  border: 2px solid var(--line-strong);
  padding: 1px 7px;
  transition: background-color var(--ease), color var(--ease), border-color var(--ease);
}

.page-faq .faq-group h2 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 26px;
  line-height: 1.25;
  letter-spacing: -.3px;
  color: var(--paper);
  margin: 0;
}

/* ---------- 折叠条目 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
  border-left: 3px solid transparent;
  transition: border-left-color var(--ease), padding-left var(--ease);
}

.page-faq .faq-item[open] {
  border-left-color: var(--cyan);
  padding-left: 14px;
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 17px 0 15px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--paper);
  transition: color var(--ease), font-weight var(--ease);
}

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

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

.page-faq .faq-item > summary::before {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-num);
  font-size: 17px;
  font-weight: 700;
  color: var(--cyan);
  line-height: 1.6;
}

.page-faq .faq-item[open] > summary {
  font-weight: 800;
  color: var(--paper);
}

.page-faq .faq-item[open] > summary::before {
  content: "\2212";
}

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

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .faq-item__body {
  padding: 0 0 20px 29px;
  max-width: 72ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}

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

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

/* ---------- 数值提示气泡 ---------- */
.page-faq .num-hint {
  position: relative;
  font-family: var(--font-num);
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--cyan);
  border-bottom: 1px dashed var(--faq-tip-border);
  cursor: help;
  outline-offset: 4px;
}

.page-faq .num-hint__tip {
  position: absolute;
  left: 0;
  bottom: calc(100% + 10px);
  z-index: 6;
  width: max-content;
  max-width: min(262px, 68vw);
  padding: 8px 11px;
  background: var(--ink-000);
  border: 2px solid var(--cyan);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0;
  line-height: 1.6;
  text-align: left;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--ease), visibility var(--ease);
}

.page-faq .num-hint:hover .num-hint__tip,
.page-faq .num-hint:focus-visible .num-hint__tip {
  opacity: 1;
  visibility: visible;
}

/* ---------- 组内链接与引导 ---------- */
.page-faq .faq-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--faq-tip-border);
  transition: color var(--ease), border-bottom-color var(--ease);
}

.page-faq .faq-link:hover,
.page-faq .faq-link:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

.page-faq .faq-group__ask {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-revisit__figure {
  margin: 6px 0 4px;
}

/* ---------- 收尾行动区 ---------- */
.page-faq .faq-cta {
  margin-top: 8px;
  padding: 24px 22px;
  background: var(--ink-800);
  border: 3px solid var(--line-strong);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-cta > p {
  margin: 0 0 18px;
  max-width: 60ch;
  font-size: 17px;
  line-height: 1.75;
  color: var(--paper);
}

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

.page-faq .faq-cta__note {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 响应式 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-index {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 44px;
    align-items: start;
  }

  .page-faq .faq-group h2 {
    font-size: 32px;
  }

  .page-faq .faq-group:target {
    border-top-width: 3px;
  }

  .page-faq .faq-cta {
    padding: 32px 34px;
  }
}

@media (max-width: 640px) {
  .page-faq {
    padding-bottom: 56px;
  }

  .page-faq .faq-hero h1 {
    max-width: none;
  }

  .page-faq .faq-group {
    margin-top: 42px;
  }

  .page-faq .faq-group__head {
    gap: 10px;
  }

  .page-faq .faq-group h2 {
    font-size: 22px;
  }

  .page-faq .faq-item[open] {
    padding-left: 10px;
  }

  .page-faq .faq-item__body {
    padding-left: 26px;
    font-size: 15px;
  }

  .page-faq .media-frame,
  .page-faq .faq-cta {
    box-shadow: 4px 4px 0 0 var(--ink-000);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-pill:hover,
  .page-faq .faq-pill:focus-visible {
    transform: none;
  }

  .page-faq .faq-item,
  .page-faq .faq-item > summary,
  .page-faq .faq-pill {
    transition: color var(--ease), border-color var(--ease), background-color var(--ease);
  }
}