.page-faq {
  --faq-rail: 2.25rem;
  --faq-gap: clamp(1.25rem, 2.6vw, 2.25rem);
  --faq-line: var(--line);
  --faq-qpad: clamp(1rem, 2vw, 1.4rem);
  display: block;
  padding-bottom: clamp(3rem, 7vw, 5rem);
}

.page-faq .breadcrumb {
  margin: clamp(1.25rem, 3vw, 2rem) 0 0;
  color: var(--mist);
  font-size: 0.8125rem;
}

.page-faq .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

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

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: clamp(1.5rem, 4vw, 2.75rem) 0 clamp(1.5rem, 3.5vw, 2.5rem);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  width: min(42%, 460px);
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--orange));
}

.page-faq .faq-hero .label {
  color: var(--orange);
  margin: 0;
}

.page-faq .faq-hero h1 {
  margin: 0.7rem 0 0;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(1.85rem, 5vw, 3.35rem);
  line-height: 1.14;
  letter-spacing: -0.01em;
  max-width: 17em;
  color: var(--paper);
}

.page-faq .faq-hero__lede {
  margin: clamp(1rem, 2vw, 1.4rem) 0 0;
  max-width: 34em;
  color: var(--soft);
  font-size: 1.0625rem;
  line-height: 1.75;
}

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(8.5rem, 1fr));
  gap: 1px;
  margin: clamp(1.5rem, 3.5vw, 2.4rem) 0 0;
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .faq-stats__col {
  background: var(--navy);
  padding: 0.9rem clamp(0.85rem, 1.8vw, 1.15rem) 1rem;
}

.page-faq .faq-stats dt {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-faq .faq-stats dd {
  margin: 0.45rem 0 0;
  font-size: 1.375rem;
  line-height: 1.2;
  color: var(--paper);
}

/* ---------- 章节索引条 ---------- */

.page-faq .index-bar {
  display: flex;
  gap: 0.5rem;
  margin: clamp(1.25rem, 3vw, 1.9rem) 0 0;
  overflow-x: auto;
  padding-bottom: 0.5rem;
  scrollbar-width: thin;
}

.page-faq .index-bar__link {
  flex: 0 0 auto;
  padding: 0.45rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  line-height: 1.2;
  color: var(--mist);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .index-bar__link:hover,
.page-faq .index-bar__link:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
  background: var(--stand);
}

/* ---------- 章节骨架 ---------- */

.page-faq .guide {
  padding-top: clamp(2.5rem, 6vw, 4.5rem);
  scroll-margin-top: 5.5rem;
}

.page-faq .guide__head {
  display: grid;
  grid-template-columns: var(--faq-rail) minmax(0, 1fr);
  gap: 0 1.1rem;
  margin-bottom: clamp(1.25rem, 2.6vw, 1.9rem);
}

.page-faq .guide__num {
  padding-top: 0.5rem;
  font-size: 0.875rem;
  letter-spacing: 0.06em;
  color: var(--orange);
}

.page-faq .guide__title {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(1.35rem, 3.4vw, 2rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .guide__lede {
  margin: 0.6rem 0 0;
  max-width: 34em;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--soft);
}

.page-faq .guide__split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  align-items: start;
}

.page-faq .guide__aside {
  display: grid;
  gap: clamp(1rem, 2vw, 1.4rem);
  align-content: start;
}

/* ---------- 步骤轨道 ---------- */

.page-faq .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-faq .steps__item {
  position: relative;
  display: grid;
  grid-template-columns: var(--faq-rail) minmax(0, 1fr);
  gap: 0 1.1rem;
  padding-bottom: clamp(1.1rem, 2.4vw, 1.6rem);
}

.page-faq .steps__item:last-child {
  padding-bottom: 0;
}

.page-faq .steps__item:not(:last-child)::before {
  content: "";
  position: absolute;
  left: calc(var(--faq-rail) / 2);
  top: calc(var(--faq-rail) + 0.3rem);
  bottom: 0.15rem;
  width: 1px;
  transform: translateX(-50%);
  background: linear-gradient(180deg, var(--faq-line) 0%, var(--faq-line) 62%, transparent 100%);
}

.page-faq .steps__marker {
  display: grid;
  justify-items: center;
  align-content: start;
}

.page-faq .steps__index {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: var(--faq-rail);
  height: var(--faq-rail);
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--stand);
  color: var(--mist);
  font-size: 0.8125rem;
  line-height: 1;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .steps__item:hover .steps__index {
  border-color: var(--orange);
  color: var(--orange);
  box-shadow: 0 0 0 3px rgba(255, 107, 26, 0.12);
}

.page-faq .steps__content h3 {
  margin: 0.35rem 0 0.45rem;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.0625rem;
  line-height: 1.45;
  color: var(--paper);
}

.page-faq .steps__content p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--soft);
}

.page-faq .ui {
  font-family: var(--font-mono);
  font-size: 0.88em;
  color: var(--cyan);
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.24);
  border-radius: 2px;
  padding: 0.05em 0.35em;
  white-space: nowrap;
}

.page-faq .key {
  display: inline-block;
  min-width: 1.5em;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.85em;
  color: var(--navy);
  background: var(--amber);
  border-radius: 2px;
  padding: 0.08em 0.4em;
  font-weight: 700;
}

/* ---------- 图片容器 ---------- */

.page-faq .figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--abyss);
  overflow: hidden;
}

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

.page-faq .figure__caption {
  padding: 0.75rem clamp(0.9rem, 2vw, 1.1rem);
  border-top: 1px solid var(--line);
  font-size: 0.8125rem;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 区间滑块示意 ---------- */

.page-faq .range-demo {
  margin-top: clamp(1.5rem, 3.2vw, 2.25rem);
  padding: clamp(1rem, 2vw, 1.4rem) clamp(1rem, 2.2vw, 1.6rem);
  background: var(--stand);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-faq .range-demo__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.6rem 1rem;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-faq .range-demo__readout {
  font-size: 1.0625rem;
  letter-spacing: 0.02em;
  color: var(--orange);
}

.page-faq .range-track {
  position: relative;
  height: 6px;
  margin: 1.5rem 0 1.9rem;
  border-radius: 3px;
  background: var(--abyss);
  border: 1px solid var(--line);
}

.page-faq .range-fill {
  position: absolute;
  top: -1px;
  bottom: -1px;
  left: 6%;
  right: -1px;
  border-radius: 3px;
  background: linear-gradient(90deg, rgba(0, 230, 118, 0.5) 0%, rgba(34, 211, 238, 0.55) 48%, rgba(255, 107, 26, 0.75) 100%);
}

.page-faq .range-handle {
  position: absolute;
  top: 50%;
  width: 0.875rem;
  height: 0.875rem;
  border-radius: 50%;
  background: var(--navy);
  border: 2px solid var(--orange);
  transform: translate(-50%, -50%);
  box-shadow: 0 0 0 3px rgba(255, 107, 26, 0.16);
}

.page-faq .range-handle--start {
  left: 6%;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.16);
}

.page-faq .range-handle--end {
  left: calc(100% - 0.5rem);
}

.page-faq .range-scale {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--mist);
  letter-spacing: 0.04em;
}

/* ---------- 状态图例 ---------- */

.page-faq .legend {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: clamp(1.5rem, 3vw, 2.1rem);
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .legend__cell {
  background: var(--navy);
  padding: clamp(0.95rem, 2vw, 1.25rem) clamp(1rem, 2vw, 1.3rem);
}

.page-faq .legend__tag {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

.page-faq .legend__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex: 0 0 auto;
}

.page-faq .legend__tag--ok { color: var(--green); }
.page-faq .legend__tag--ok .legend__dot { background: var(--green); }

.page-faq .legend__tag--wait { color: var(--amber); }
.page-faq .legend__tag--wait .legend__dot { background: var(--amber); }

.page-faq .legend__tag--change { color: var(--orange); }
.page-faq .legend__tag--change .legend__dot { background: var(--orange); }

.page-faq .legend__desc {
  margin: 0.55rem 0 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--soft);
}

/* ---------- 常见卡点折叠 ---------- */

.page-faq .asks {
  display: grid;
  gap: 0.75rem;
}

.page-faq .ask {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--stand);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease);
}

.page-faq .ask:hover,
.page-faq .ask[open] {
  border-color: var(--orange);
}

.page-faq .ask__q {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: var(--faq-qpad);
  cursor: pointer;
  list-style: none;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1.0625rem;
  line-height: 1.55;
  color: var(--paper);
  transition: color var(--dur) var(--ease);
}

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

.page-faq .ask__q:hover {
  color: var(--orange);
}

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

.page-faq .ask__sign {
  position: relative;
  flex: 0 0 auto;
  width: 1rem;
  height: 1rem;
  margin-top: 0.35rem;
}

.page-faq .ask__sign::before,
.page-faq .ask__sign::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--orange);
  transform: translate(-50%, -50%);
}

.page-faq .ask__sign::before {
  width: 0.8rem;
  height: 1px;
}

.page-faq .ask__sign::after {
  width: 1px;
  height: 0.8rem;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-faq .ask[open] .ask__sign::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}

.page-faq .ask__a {
  padding: 0 var(--faq-qpad) var(--faq-qpad) calc(var(--faq-qpad) + 1.85rem);
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--soft);
}

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

.page-faq .ask__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 211, 238, 0.4);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

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

/* ---------- 结尾动作区 ---------- */

.page-faq .faq-cta {
  position: relative;
  display: grid;
  gap: clamp(1.25rem, 2.6vw, 1.75rem);
  margin-top: clamp(3rem, 7vw, 5rem);
  padding: clamp(1.5rem, 3.5vw, 2.6rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--stand) 0%, var(--navy) 58%, var(--abyss) 100%);
  overflow: hidden;
}

.page-faq .faq-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(115deg, rgba(34, 211, 238, 0.07) 0 1px, transparent 1px 26px);
  pointer-events: none;
}

.page-faq .faq-cta__body {
  position: relative;
}

.page-faq .faq-cta h2 {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(1.25rem, 2.8vw, 1.75rem);
  line-height: 1.3;
  color: var(--paper);
}

.page-faq .faq-cta p {
  margin: 0.7rem 0 0;
  max-width: 36em;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--soft);
}

.page-faq .faq-cta__actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

/* ---------- 响应式 ---------- */

@media (min-width: 44rem) {
  .page-faq .legend {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 62rem) {
  .page-faq .guide__split {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

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

@media (max-width: 30rem) {
  .page-faq {
    --faq-rail: 2rem;
  }

  .page-faq .guide__head {
    grid-template-columns: 1fr;
    gap: 0.4rem;
  }

  .page-faq .guide__num {
    padding-top: 0;
  }

  .page-faq .steps__item {
    gap: 0 0.85rem;
  }

  .page-faq .ask__a {
    padding-left: var(--faq-qpad);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .steps__index,
  .page-faq .index-bar__link,
  .page-faq .ask,
  .page-faq .ask__sign::after {
    transition: none;
  }
}