.page-faq {
  --faq-rail-w: 232px;
  --faq-item-bg: var(--ink-800);
  --faq-shadow: 0 18px 40px rgba(0, 0, 0, 0.32);
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs {
  padding-top: 1.6rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 2.2rem 0 2.9rem;
  margin-top: 1.2rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: -14%;
  width: 58%;
  height: 100%;
  background: linear-gradient(155deg, rgba(255, 106, 43, 0.16), rgba(46, 242, 208, 0.06) 52%, transparent 78%);
  clip-path: polygon(22% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: -6%;
  bottom: -56px;
  width: 52%;
  height: 120px;
  background: linear-gradient(90deg, rgba(46, 242, 208, 0.16), transparent);
  transform: skewY(-4deg);
  pointer-events: none;
}

.page-faq .faq-hero-inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero h1 {
  margin: 0.55rem 0 0;
  font-size: clamp(2.1rem, 7.4vw, 4.6rem);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.015em;
  color: var(--paper);
  max-width: 20ch;
}

.page-faq .faq-hero-inner .lede {
  margin-top: 1.15rem;
  max-width: 62ch;
  color: var(--steel);
  font-size: 1rem;
  line-height: 1.8;
}

.page-faq .faq-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 2.2rem;
  margin-top: 1.9rem;
  padding-top: 1.35rem;
  border-top: 1px dashed var(--line-strong);
  list-style: none;
}

.page-faq .faq-stats li {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.page-faq .faq-stats .data-num {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--cyan);
  text-shadow: 0 0 18px rgba(46, 242, 208, 0.4);
  letter-spacing: -0.02em;
}

.page-faq .faq-stat-label {
  font-size: 0.875rem;
  color: var(--steel);
}

/* ---------- 两栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.8rem;
  padding-top: 2.2rem;
  padding-bottom: 3.6rem;
}

/* ---------- 场景索引轨 ---------- */
.page-faq .faq-rail {
  min-width: 0;
}

.page-faq .faq-rail-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--silver);
  margin: 0 0 0.7rem;
}

.page-faq .faq-rail-list {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scrollbar-width: none;
  padding-bottom: 0.35rem;
  margin: 0;
  list-style: none;
}

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

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

.page-faq .faq-rail-list a {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.5rem 0.9rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  background: var(--ink-800);
  color: var(--paper);
  font-size: 0.875rem;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-rail-list a:hover,
.page-faq .faq-rail-list a:focus-visible {
  border-color: var(--line-cyan);
  background: var(--ink-700);
  color: var(--cyan);
}

.page-faq .faq-rail-idx {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--orange);
}

.page-faq .faq-rail-cta {
  margin-top: 1.4rem;
  padding: 1.1rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--ink-800);
}

.page-faq .faq-rail-cta p {
  margin: 0 0 0.8rem;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--steel);
}

/* ---------- 场景区块 ---------- */
.page-faq .faq-body {
  min-width: 0;
}

.page-faq .faq-scene {
  padding-bottom: 2.6rem;
  margin-bottom: 2.6rem;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-scene:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-scene-head {
  position: relative;
  padding-right: 0.5rem;
  margin-bottom: 1.5rem;
}

.page-faq .faq-scene-idx {
  position: absolute;
  top: -0.28em;
  right: 0;
  font-family: var(--font-mono);
  font-size: clamp(3.4rem, 11vw, 6rem);
  font-weight: 700;
  line-height: 1;
  color: rgba(46, 242, 208, 0.075);
  pointer-events: none;
  user-select: none;
}

.page-faq .faq-scene-head .eyebrow {
  color: var(--orange);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.page-faq .faq-scene-head .section-title {
  margin: 0.35rem 0 0;
  font-size: clamp(1.5rem, 4.6vw, 2.2rem);
  font-weight: 800;
  line-height: 1.22;
  color: var(--paper);
  max-width: 24ch;
}

.page-faq .faq-scene-head .section-lede {
  margin-top: 0.7rem;
  max-width: 58ch;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--steel);
}

/* ---------- 问答手风琴 ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--line);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
  background: transparent;
  transition: background var(--dur) var(--ease);
}

.page-faq .faq-item[open] {
  background: linear-gradient(90deg, rgba(46, 242, 208, 0.045), transparent 62%);
}

.page-faq .faq-item > summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.7rem;
  padding: 1rem 0.2rem;
  cursor: pointer;
  list-style: none;
  transition: color var(--dur) var(--ease);
}

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

.page-faq .faq-item > summary::after {
  content: "";
  flex: 0 0 auto;
  width: 0.44rem;
  height: 0.44rem;
  margin-left: auto;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(45deg) translateY(-2px);
  transition: transform var(--dur) var(--ease);
}

.page-faq .faq-item[open] > summary::after {
  transform: rotate(225deg) translateY(-2px);
}

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

.page-faq .faq-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--orange);
}

.page-faq .faq-q {
  flex: 1 1 15rem;
  min-width: 0;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-a {
  padding: 0 0.2rem 1.25rem;
}

.page-faq .faq-a p {
  margin: 0;
  max-width: 66ch;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--steel);
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 1.6rem 0 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: var(--ink-700);
  object-fit: cover;
}

.page-faq .faq-figure .media-caption {
  margin-top: 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.03em;
  color: var(--silver);
}

/* ---------- 段末补充 ---------- */
.page-faq .faq-aside {
  margin-top: 1.6rem;
  padding: 1rem 1.15rem;
  border-left: 2px solid var(--line-cyan);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: var(--ink-800);
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--steel);
}

.page-faq .faq-aside a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(46, 242, 208, 0.4);
}

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

/* ---------- 焦点可见 ---------- */
.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
  border-radius: var(--radius-md);
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero {
    padding: 3rem 0 3.6rem;
  }

  .page-faq .faq-stats {
    gap: 0.75rem 3rem;
  }

  .page-faq .faq-item > summary {
    padding: 1.1rem 0.2rem;
  }

  .page-faq .faq-q {
    font-size: 1.0625rem;
  }
}

/* ---------- 桌面：左侧锚点轨 + 右侧正文 ---------- */
@media (min-width: 940px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 3.4rem;
    padding-top: 3rem;
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 1.75rem);
  }

  .page-faq .faq-rail-list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--line);
  }

  .page-faq .faq-rail-list li + li {
    margin-top: 0.15rem;
  }

  .page-faq .faq-rail-list a {
    width: 100%;
    box-sizing: border-box;
    display: flex;
    align-items: baseline;
    gap: 0.7rem;
    padding: 0.6rem 0.9rem 0.6rem 1rem;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0 var(--radius-pill) var(--radius-pill) 0;
    background: transparent;
    color: var(--steel);
    white-space: normal;
  }

  .page-faq .faq-rail-list a:hover,
  .page-faq .faq-rail-list a:focus-visible {
    border-left-color: var(--cyan);
    background: var(--ink-800);
    color: var(--paper);
    box-shadow: inset 0 0 0 1px var(--line);
  }

  .page-faq .faq-rail-idx {
    font-size: 0.75rem;
    color: var(--orange);
  }

  .page-faq .faq-scene {
    padding-bottom: 3.2rem;
    margin-bottom: 3.2rem;
  }

  .page-faq .faq-item > summary {
    padding: 1.2rem 0.3rem;
  }

  .page-faq .faq-a {
    padding: 0 0.3rem 1.5rem 3.1rem;
  }

  .page-faq .faq-figure {
    margin-top: 2rem;
  }
}

/* ---------- 大屏 ---------- */
@media (min-width: 1200px) {
  .page-faq {
    --faq-rail-w: 252px;
  }

  .page-faq .faq-hero h1 {
    max-width: 18ch;
  }

  .page-faq .faq-layout {
    gap: 4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item > summary::after,
  .page-faq .faq-q,
  .page-faq .faq-rail-list a,
  .page-faq .faq-item {
    transition: none;
  }
}