.page-faq {
  --faq-rail: 252px;
  --faq-gap: clamp(1.5rem, 4vw, 3rem);
  background: var(--c-void);
  color: var(--c-cold);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: clamp(2rem, 6vw, 4rem) 0 clamp(1.5rem, 4vw, 2.75rem);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -30% auto auto -25%;
  width: min(760px, 90%);
  height: 460px;
  background: radial-gradient(58% 100% at 30% 40%, rgba(200, 255, 61, 0.13), transparent 72%);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  margin-top: 1.5rem;
}

.page-faq .faq-hero__title {
  max-width: 18ch;
  margin: 0.5rem 0 1rem;
}

.page-faq .faq-hero__lede {
  max-width: 62ch;
  margin: 0;
  color: var(--c-cold);
  opacity: 0.88;
}

.page-faq .faq-hero__figure {
  margin: 0;
  background: var(--c-graphite);
  clip-path: polygon(0 0, 100% 5%, 100% 100%, 0 95%);
  overflow: hidden;
}

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

/* ---------- 顶部分类筛选条 ---------- */

.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem 1.1rem;
  padding: 0.9rem 1.1rem;
  background: var(--c-graphite);
  border: 1px solid var(--c-charcoal);
  border-left: 3px solid var(--c-lime);
  margin-bottom: var(--faq-gap);
}

.page-faq .faq-filter__label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--c-mist);
  text-transform: none;
}

.page-faq .faq-filter__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-faq .faq-filter__link {
  display: inline-block;
  padding: 0.35rem 0.8rem;
  font-size: 0.85rem;
  color: var(--c-cold);
  text-decoration: none;
  border: 1px solid var(--c-charcoal);
  background: var(--c-graphite-hi);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease),
    background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-filter__link:hover,
.page-faq .faq-filter__link:focus-visible {
  color: var(--c-void);
  background: var(--c-lime);
  border-color: var(--c-lime);
  transform: translateY(-1px);
  outline: none;
}

/* ---------- 主体两栏 ---------- */

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  align-items: start;
  padding-bottom: clamp(3rem, 8vw, 6rem);
}

/* ---------- 左侧索引 ---------- */

.page-faq .faq-index__title {
  margin: 0 0 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--c-mist);
}

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

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

.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex: 0 0 auto;
  padding: 0.55rem 0.9rem;
  border: 1px solid var(--c-charcoal);
  background: var(--c-graphite);
  color: var(--c-cold);
  text-decoration: none;
  font-size: 0.88rem;
  white-space: nowrap;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease),
    background var(--dur) var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-color: var(--c-lime);
  color: var(--c-lime);
  outline: none;
}

.page-faq .faq-index__no {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--c-lime);
  letter-spacing: 0.06em;
}

.page-faq .faq-index__figure {
  display: none;
  margin: 2rem 0 0;
  background: var(--c-graphite);
}

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

.page-faq .faq-index__figure .lj-figure__caption {
  display: block;
  padding: 0.7rem 0.9rem;
  font-size: 0.76rem;
  line-height: 1.6;
  color: var(--c-mist);
  border: 1px solid var(--c-charcoal);
  border-top: none;
}

/* ---------- 分类 ---------- */

.page-faq .faq-cat {
  scroll-margin-top: 6rem;
  margin-bottom: clamp(2.5rem, 6vw, 4rem);
}

.page-faq .faq-cat__head {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--c-charcoal);
  margin-bottom: 1.1rem;
}

.page-faq .faq-cat__no {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--c-lime);
}

.page-faq .faq-cat__head .lj-h2 {
  margin: 0;
}

/* ---------- 问答块 ---------- */

.page-faq .faq-item {
  border: 1px solid var(--c-charcoal);
  border-left: 2px solid transparent;
  background: var(--c-graphite);
  margin-bottom: 0.6rem;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-item:hover {
  border-color: rgba(200, 255, 61, 0.4);
  border-left-color: rgba(200, 255, 61, 0.4);
}

.page-faq .faq-item[open] {
  background: var(--c-graphite-hi);
  border-color: rgba(200, 255, 61, 0.32);
  border-left-color: var(--c-lime);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 1rem 1.05rem;
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  font-size: clamp(0.96rem, 1.6vw, 1.06rem);
  line-height: 1.5;
  color: var(--c-cold);
}

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

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--c-blue);
  outline-offset: -2px;
}

.page-faq .faq-item__no {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--c-lime);
  letter-spacing: 0.06em;
  padding-top: 0.1rem;
}

.page-faq .faq-item__no::before {
  content: "";
  display: block;
  width: 16px;
  height: 2px;
  background: var(--c-lime);
  margin-bottom: 0.42rem;
}

.page-faq .faq-item__text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-item__toggle {
  position: relative;
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  margin-left: auto;
  margin-top: 0.35rem;
}

.page-faq .faq-item__toggle::before,
.page-faq .faq-item__toggle::after {
  content: "";
  position: absolute;
  background: var(--c-mist);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-item__toggle::before {
  top: 50%;
  left: 0;
  width: 100%;
  height: 2px;
  transform: translateY(-50%);
}

.page-faq .faq-item__toggle::after {
  left: 50%;
  top: 0;
  width: 2px;
  height: 100%;
  transform: translateX(-50%);
}

.page-faq .faq-item[open] .faq-item__toggle::before {
  background: var(--c-lime);
}

.page-faq .faq-item[open] .faq-item__toggle::after {
  transform: translateX(-50%) scaleY(0);
}

.page-faq .faq-item__a {
  padding: 0 1.05rem 1.2rem;
  font-size: 0.93rem;
  line-height: 1.78;
  color: #c9d2ca;
}

.page-faq .faq-item__a p {
  margin: 0 0 0.7rem;
}

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

.page-faq .faq-k {
  color: var(--c-blue);
  font-weight: 600;
  font-style: normal;
}

/* ---------- 底部引导 ---------- */

.page-faq .faq-more {
  scroll-margin-top: 6rem;
}

.page-faq .faq-more__inner {
  position: relative;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  background: var(--c-graphite);
  border: 1px solid var(--c-charcoal);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-faq .faq-more__inner::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 84px;
  background: var(--c-orange);
}

.page-faq .faq-more__title {
  margin: 0.4rem 0 0.9rem;
}

.page-faq .faq-more__text {
  margin: 0 0 1.2rem;
  max-width: 58ch;
  color: #c9d2ca;
  line-height: 1.78;
  font-size: 0.95rem;
}

.page-faq .faq-more__tips {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.page-faq .faq-more__tips li {
  position: relative;
  padding-left: 1.4rem;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--c-cold);
}

.page-faq .faq-more__tips li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 12px;
  height: 2px;
  background: var(--c-lime);
}

.page-faq .faq-more__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.page-faq .faq-more__note {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--c-mist);
}

.page-faq .faq-more__link {
  color: var(--c-cold);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-more__link:hover,
.page-faq .faq-more__link:focus-visible {
  color: var(--c-blue);
  outline: none;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-faq .faq-item__a {
    padding-left: 3.5rem;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: end;
  }

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

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4rem);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 5.5rem;
    align-self: start;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 0.45rem;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-faq .faq-index__link {
    width: 100%;
    box-sizing: border-box;
    justify-content: flex-start;
    white-space: normal;
  }

  .page-faq .faq-index__figure {
    display: block;
  }
}

@media (max-width: 400px) {
  .page-faq .faq-filter {
    padding: 0.75rem 0.85rem;
  }

  .page-faq .faq-item__q {
    padding: 0.85rem 0.8rem;
    gap: 0.6rem;
  }

  .page-faq .faq-item__a {
    padding: 0 0.85rem 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-filter__link,
  .page-faq .faq-item,
  .page-faq .faq-item__toggle::before,
  .page-faq .faq-item__toggle::after,
  .page-faq .faq-more__link {
    transition: none;
  }
}