.page-faq {
  --faq-q-pad: 16px;
  --faq-num-w: 28px;
  --faq-q-gap: 12px;
  --faq-glow: rgba(53, 241, 196, 0.12);
  position: relative;
  padding-top: calc(var(--ly-header-h) + 28px);
  padding-bottom: 84px;
  background:
    radial-gradient(760px 480px at 88% -6%, rgba(53, 241, 196, 0.12), transparent 62%),
    radial-gradient(620px 460px at -8% 14%, rgba(124, 92, 255, 0.14), transparent 58%),
    var(--ly-abyss);
  color: var(--ly-text);
  overflow-x: hidden;
}

.page-faq img {
  max-width: 100%;
  height: auto;
}

/* ---------- 面包屑 ---------- */
.page-faq .ly-breadcrumb {
  margin-bottom: 26px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: 28px;
  align-items: center;
  padding-bottom: 42px;
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--ly-font-display);
  font-weight: 800;
  font-size: clamp(30px, 7.4vw, 56px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--ly-white);
}

.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ly-text-soft);
}

.page-faq .faq-hero__media {
  position: relative;
  overflow: hidden;
  border-radius: var(--ly-radius-lg);
  background: var(--ly-board);
  clip-path: polygon(0 5%, 100% 0, 100% 95%, 0 100%);
}

.page-faq .faq-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(140deg, rgba(5, 25, 43, 0.5) 0%, rgba(5, 25, 43, 0) 46%, rgba(255, 107, 74, 0.16) 100%);
  pointer-events: none;
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 检索与坐标索引 ---------- */
.page-faq .faq-toolbar {
  display: grid;
  gap: 14px;
  padding: 16px;
  border: 1px solid var(--ly-line);
  border-radius: var(--ly-radius-lg);
  background: linear-gradient(180deg, rgba(11, 39, 64, 0.92), rgba(5, 25, 43, 0.72));
}

.page-faq .faq-filter {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 52px;
  padding: 0 18px;
  border: 1px solid var(--ly-line);
  border-radius: var(--ly-radius-pill);
  background: rgba(5, 25, 43, 0.86);
  transition: border-color 0.24s var(--ly-ease), box-shadow 0.24s var(--ly-ease);
}

.page-faq .faq-filter:focus-within {
  border-color: var(--ly-cyan);
  box-shadow: 0 0 0 3px rgba(53, 241, 196, 0.18);
}

.page-faq .faq-filter__icon {
  flex: none;
  width: 18px;
  height: 18px;
  color: var(--ly-cyan);
}

.page-faq .faq-filter input {
  flex: 1 1 auto;
  min-width: 0;
  height: 100%;
  border: 0;
  outline: none;
  background: transparent;
  color: var(--ly-white);
  font-family: var(--ly-font-ui);
  font-size: 15px;
}

.page-faq .faq-filter input::placeholder {
  color: rgba(143, 166, 184, 0.9);
}

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

.page-faq .faq-index a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 15px;
  border: 1px solid var(--ly-line);
  border-radius: var(--ly-radius-pill);
  color: var(--ly-text-soft);
  font-family: var(--ly-font-ui);
  font-size: 13.5px;
  line-height: 1.2;
  text-decoration: none;
  transition: border-color 0.2s var(--ly-ease), color 0.2s var(--ly-ease), background 0.2s var(--ly-ease);
}

.page-faq .faq-index a:hover,
.page-faq .faq-index a:focus-visible {
  border-color: var(--ly-violet);
  background: rgba(124, 92, 255, 0.16);
  color: var(--ly-white);
}

.page-faq .faq-index b {
  font-family: var(--ly-font-mono);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ly-cyan);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--ly-header-h) + 22px);
  padding-top: 52px;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px 16px;
  align-items: baseline;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--ly-line);
}

.page-faq .faq-group__coord {
  font-family: var(--ly-font-mono);
  font-weight: 700;
  font-size: clamp(26px, 5vw, 38px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--ly-coral);
  text-shadow: 0 0 26px rgba(255, 107, 74, 0.36);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--ly-font-display);
  font-weight: 700;
  font-size: clamp(22px, 3.8vw, 32px);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--ly-white);
}

.page-faq .faq-group__lede {
  grid-column: 1 / -1;
  margin: 4px 0 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ly-text-soft);
}

/* ---------- 问题列表 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.page-faq .faq-item {
  overflow: hidden;
  border: 1px solid var(--ly-line);
  border-radius: var(--ly-radius-md);
  background: rgba(11, 39, 64, 0.58);
  transition: border-color 0.24s var(--ly-ease), background 0.24s var(--ly-ease);
}

.page-faq .faq-item:hover {
  border-color: rgba(124, 92, 255, 0.5);
}

.page-faq .faq-item[open] {
  border-color: rgba(255, 107, 74, 0.55);
  background: linear-gradient(180deg, rgba(11, 39, 64, 0.96), rgba(5, 25, 43, 0.92));
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: var(--faq-num-w) 1fr auto;
  gap: var(--faq-q-gap);
  align-items: center;
  padding: var(--faq-q-pad);
  cursor: pointer;
  list-style: none;
  font-family: var(--ly-font-ui);
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ly-white);
}

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

.page-faq .faq-item__q::marker {
  content: "";
}

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--ly-cyan);
  outline-offset: -2px;
  border-radius: var(--ly-radius-md);
}

.page-faq .faq-item__num {
  position: relative;
  font-family: var(--ly-font-mono);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--ly-mist);
  transition: color 0.24s var(--ly-ease);
}

.page-faq .faq-item[open] .faq-item__num {
  color: var(--ly-coral);
}

.page-faq .faq-item[open] .faq-item__num::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -7px;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--ly-coral);
}

.page-faq .faq-item__mark {
  position: relative;
  flex: none;
  width: 22px;
  height: 22px;
  border: 1px solid var(--ly-line);
  border-radius: var(--ly-radius-pill);
  transition: border-color 0.24s var(--ly-ease), background 0.24s var(--ly-ease);
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 9px;
  height: 2px;
  border-radius: 2px;
  background: var(--ly-mist);
  transform: translate(-50%, -50%);
  transition: transform 0.24s var(--ly-ease), background 0.24s var(--ly-ease);
}

.page-faq .faq-item__mark::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.page-faq .faq-item[open] .faq-item__mark {
  border-color: rgba(255, 107, 74, 0.6);
  background: rgba(255, 107, 74, 0.12);
}

.page-faq .faq-item[open] .faq-item__mark::before,
.page-faq .faq-item[open] .faq-item__mark::after {
  background: var(--ly-coral);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.page-faq .faq-item__a {
  padding: 0 var(--faq-q-pad) 18px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ly-text-soft);
}

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

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

.page-faq .faq-item__lead {
  display: block;
  font-weight: 600;
  color: var(--ly-white);
}

.page-faq .faq-item__a a {
  color: var(--ly-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 241, 196, 0.4);
  transition: color 0.2s var(--ly-ease), border-color 0.2s var(--ly-ease);
}

.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  color: var(--ly-coral);
  border-bottom-color: rgba(255, 107, 74, 0.6);
}

/* ---------- 图解 ---------- */
.page-faq .faq-figure {
  position: relative;
  margin: 22px 0 0;
  overflow: hidden;
  border: 1px solid var(--ly-line);
  border-radius: var(--ly-radius-lg);
  background: var(--ly-board);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-faq .faq-figure__cap {
  padding: 13px 18px;
  border-top: 1px solid var(--ly-line);
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--ly-mist);
}

/* ---------- 尾部引导 ---------- */
.page-faq .faq-next {
  margin-top: 68px;
  padding: 28px 22px;
  border: 1px solid var(--ly-line);
  border-radius: var(--ly-radius-lg);
  background:
    radial-gradient(520px 260px at 92% 0%, rgba(255, 107, 74, 0.18), transparent 66%),
    linear-gradient(180deg, rgba(11, 39, 64, 0.96), rgba(5, 25, 43, 0.88));
}

.page-faq .faq-next__title {
  margin: 0;
  font-family: var(--ly-font-display);
  font-weight: 700;
  font-size: clamp(21px, 3.4vw, 28px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--ly-white);
}

.page-faq .faq-next__text {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ly-text-soft);
}

.page-faq .faq-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

/* ---------- 平板起 ---------- */
@media (min-width: 700px) {
  .page-faq {
    --faq-q-pad: 20px;
    --faq-num-w: 32px;
    --faq-q-gap: 14px;
  }

  .page-faq .faq-item__a {
    padding-left: calc(var(--faq-q-pad) + var(--faq-num-w) + var(--faq-q-gap));
    padding-right: calc(var(--faq-q-pad) + 22px);
  }

  .page-faq .faq-item__lead {
    font-size: 15.5px;
  }

  .page-faq .faq-figure {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    align-items: stretch;
  }

  .page-faq .faq-figure__cap {
    display: flex;
    align-items: center;
    padding: 22px;
    border-top: 0;
    border-left: 1px solid var(--ly-line);
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-faq {
    padding-top: calc(var(--ly-header-h) + 46px);
    padding-bottom: 110px;
  }

  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 52px;
    padding-bottom: 60px;
  }

  .page-faq .faq-hero__lede {
    font-size: 17px;
  }

  .page-faq .faq-toolbar {
    grid-template-columns: minmax(260px, 340px) 1fr;
    align-items: center;
    gap: 20px;
    padding: 16px 20px;
  }

  .page-faq .faq-index {
    justify-content: flex-end;
  }

  .page-faq .faq-group {
    padding-top: 68px;
  }

  .page-faq .faq-list {
    gap: 14px;
    margin-top: 26px;
  }

  .page-faq .faq-item__q {
    padding: 20px 24px;
    font-size: 16.5px;
  }

  .page-faq .faq-item__a {
    font-size: 15.5px;
  }

  .page-faq .faq-next {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 16px 40px;
    align-items: center;
    margin-top: 86px;
    padding: 36px 40px;
  }

  .page-faq .faq-next__title,
  .page-faq .faq-next__text {
    grid-column: 1;
  }

  .page-faq .faq-next__actions {
    grid-column: 2;
    grid-row: 1 / span 2;
    margin-top: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item__num,
  .page-faq .faq-item__mark,
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-index a,
  .page-faq .faq-filter {
    transition: none;
  }
}