.page-faq {
  --faq-bg: var(--kx-paper);
  --faq-fg: var(--kx-coal);
  --faq-muted: rgba(23, 17, 13, 0.68);
  --faq-line: rgba(23, 17, 13, 0.14);
  --faq-mark: var(--kx-orange);
  --faq-border: rgba(23, 17, 13, 0.1);
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumb {
  padding-top: clamp(18px, 3vw, 30px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: clamp(28px, 5vw, 56px);
  padding-bottom: clamp(8px, 2vw, 18px);
}

.page-faq .faq-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 32px);
  align-items: end;
}

.page-faq .faq-hero__title {
  margin: 10px 0 0;
  font-size: clamp(44px, 10vw, 92px);
  line-height: 1.02;
  letter-spacing: -0.03em;
  font-weight: 900;
}

.page-faq .faq-hero__title .kx-display__accent {
  display: block;
  color: var(--kx-cyan);
}

.page-faq .faq-hero__side .kx-section__lead {
  margin: 0;
  max-width: 40em;
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__meta li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-left: 14px;
  border-left: 2px solid var(--kx-line-strong);
}

.page-faq .faq-hero__meta strong {
  font-family: var(--kx-mono);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--kx-cyan);
}

.page-faq .faq-hero__meta span {
  font-size: 13px;
  line-height: 1.4;
  color: var(--kx-mist);
}

.page-faq .faq-hero__media {
  margin: clamp(26px, 4vw, 44px) 0 0;
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--kx-radius-lg);
}

/* ---------- 两栏骨架：默认单列，宽屏左索引右内容 ---------- */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3.4vw, 38px);
  padding-top: clamp(30px, 5vw, 60px);
  padding-bottom: clamp(56px, 8vw, 104px);
}

/* ---------- 分组索引 ---------- */
.page-faq .faq-index {
  align-self: start;
  padding: 18px 16px 20px;
  border: 1px solid var(--kx-line);
  border-radius: var(--kx-radius);
  background: var(--kx-glass);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--kx-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--kx-mist);
}

.page-faq .faq-index__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__list > li {
  min-width: 0;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  padding: 8px 12px;
  border-radius: 10px;
  border-left: 2px solid transparent;
  font-size: 14px;
  line-height: 1.35;
  color: var(--kx-paper);
  text-decoration: none;
  transition: background 180ms var(--kx-ease), border-color 180ms var(--kx-ease), color 180ms var(--kx-ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: rgba(61, 242, 212, 0.1);
  border-left-color: var(--kx-cyan);
  color: var(--kx-cyan);
}

.page-faq .faq-index__link:focus-visible {
  outline: 2px solid var(--kx-violet);
  outline-offset: 2px;
}

.page-faq .faq-index__no {
  flex: none;
  font-family: var(--kx-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--kx-cyan);
}

.page-faq .faq-index__note {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--kx-line);
}

.page-faq .faq-index__note p {
  margin: 0 0 12px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--kx-mist);
}

/* ---------- 问题流 ---------- */
.page-faq .faq-stream {
  display: flex;
  flex-direction: column;
  gap: clamp(16px, 2.4vw, 26px);
  min-width: 0;
}

.page-faq .faq-group {
  position: relative;
  overflow: hidden;
  scroll-margin-top: 24px;
  padding: clamp(20px, 3vw, 34px);
  border: 1px solid var(--faq-border);
  border-radius: var(--kx-radius-lg);
  background: var(--faq-bg);
  color: var(--faq-fg);
}

.page-faq .faq-group::before {
  content: "";
  position: absolute;
  top: -70px;
  right: -60px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--faq-mark) 0%, rgba(0, 0, 0, 0) 70%);
  opacity: 0.08;
  pointer-events: none;
}

.page-faq .faq-group--night {
  --faq-bg: var(--kx-ink-2);
  --faq-fg: var(--kx-paper);
  --faq-muted: rgba(243, 235, 221, 0.76);
  --faq-line: rgba(147, 167, 196, 0.2);
  --faq-mark: var(--kx-cyan);
  --faq-border: rgba(61, 242, 212, 0.18);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--faq-mark);
}

.page-faq .faq-group__no {
  flex: none;
  font-family: var(--kx-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--faq-mark);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(19px, 2.4vw, 25px);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -0.01em;
}

.page-faq .faq-group__lead {
  margin: 14px 0 4px;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--faq-muted);
  max-width: 46em;
}

/* ---------- 折叠条目 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-item:last-of-type {
  border-bottom: 0;
}

.page-faq .faq-item > summary {
  position: relative;
  display: block;
  min-height: 44px;
  padding: 16px 42px 16px 0;
  font-size: clamp(15px, 1.6vw, 16.5px);
  font-weight: 700;
  line-height: 1.55;
  color: var(--faq-fg);
  list-style: none;
  cursor: pointer;
  transition: color 160ms var(--kx-ease);
}

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

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

.page-faq .faq-item > summary::after {
  content: "";
  position: absolute;
  top: 25px;
  right: 10px;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--faq-mark);
  border-bottom: 2px solid var(--faq-mark);
  transform: rotate(45deg);
  transition: transform 240ms var(--kx-ease);
}

.page-faq .faq-item[open] > summary::after {
  transform: rotate(-135deg);
}

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

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--kx-violet);
  outline-offset: 3px;
  border-radius: 6px;
}

.page-faq .faq-item__a {
  padding: 0 42px 18px 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--faq-muted);
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 46em;
}

.page-faq .faq-item__a p + p {
  margin-top: 8px;
}

.page-faq .faq-item__a a {
  color: var(--faq-mark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

.page-faq .faq-item__a a:focus-visible {
  outline: 2px solid var(--kx-violet);
  outline-offset: 2px;
}

/* ---------- 章节内配图 ---------- */
.page-faq .faq-figure {
  margin: 22px 0 4px;
  border: 1px solid var(--faq-line);
  border-radius: var(--kx-radius);
  overflow: hidden;
}

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

.page-faq .faq-figure .kx-media__caption {
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--faq-muted);
}

/* ---------- 章节收尾 ---------- */
.page-faq .faq-group__tail {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--faq-line);
  font-size: 14px;
  line-height: 1.72;
  color: var(--faq-muted);
}

.page-faq .faq-group__tail a {
  color: var(--faq-mark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-group__tail a:focus-visible {
  outline: 2px solid var(--kx-violet);
  outline-offset: 2px;
}

/* ---------- 窄屏收口 ---------- */
@media (max-width: 479px) {
  .page-faq .faq-hero__meta {
    gap: 12px 18px;
  }

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

  .page-faq .faq-index__link {
    font-size: 13px;
  }

  .page-faq .faq-item > summary {
    padding-right: 34px;
  }

  .page-faq .faq-item > summary::after {
    right: 6px;
  }

  .page-faq .faq-item__a {
    padding-right: 28px;
  }
}

/* ---------- 宽屏：左索引 + 右问答 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }
}

@media (min-width: 980px) {
  .page-faq .faq-shell {
    grid-template-columns: 238px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 108px;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    flex-wrap: nowrap;
  }

  .page-faq .faq-index__list > li {
    width: 100%;
  }

  .page-faq .faq-index__link {
    width: 100%;
  }
}

/* ---------- 降级动态 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item > summary,
  .page-faq .faq-item > summary::after,
  .page-faq .faq-index__link {
    transition: none;
  }
}