.page-faq {
  --faq-rail: 188px;
  --faq-body: #C4D5CA;
  --faq-lead: #DCEAE1;
  background: var(--ink-deep);
  color: var(--chalk);
  font-family: var(--font-body);
  padding-bottom: clamp(2rem, 5vw, 4rem);
  overflow-x: clip;
}

.page-faq a {
  color: inherit;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(1.4rem, 3.6vw, 3rem) 0 clamp(1.6rem, 3.4vw, 2.6rem);
  border-bottom: var(--rule);
  background-image:
    linear-gradient(rgba(44, 74, 63, .34) 1px, transparent 1px),
    linear-gradient(90deg, rgba(44, 74, 63, .24) 1px, transparent 1px);
  background-size: 100% 46px, 92px 100%;
  background-position: 0 0, 0 0;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  right: -14vw;
  top: -22vw;
  width: 52vw;
  height: 46vw;
  max-width: 620px;
  max-height: 560px;
  border-radius: 46% 54% 58% 42% / 52% 42% 58% 48%;
  background: radial-gradient(circle at 42% 44%, rgba(70, 227, 164, .17), rgba(70, 227, 164, 0) 68%);
  pointer-events: none;
}

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

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.2rem, 3vw, 2.4rem);
  margin-top: clamp(1rem, 2.4vw, 1.8rem);
}

.page-faq .faq-hero__code {
  display: flex;
  align-items: center;
  gap: .55rem;
  margin: 0;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-hero__code-num {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--neon);
  border: 1px solid var(--line-blue);
  border-radius: var(--r-s);
  padding: .12rem .5rem;
  background: rgba(20, 50, 40, .5);
}

.page-faq .faq-hero__title {
  font-family: var(--font-title);
  font-size: clamp(30px, 4.2vw, 56px);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -.012em;
  margin: .5rem 0 .7rem;
  color: var(--chalk);
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 34em;
  font-size: clamp(14.5px, 1.35vw, 16px);
  line-height: 1.78;
  color: var(--faq-body);
}

.page-faq .faq-hero__keys {
  list-style: none;
  margin: 1.3rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.page-faq .faq-hero__keys li {
  display: inline-flex;
  align-items: baseline;
  gap: .45rem;
  font-size: 12.5px;
  color: var(--mist);
  border: var(--rule);
  border-radius: var(--r-pill);
  padding: .32rem .8rem;
  background: rgba(20, 50, 40, .45);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-hero__keys li:hover {
  border-color: var(--neon);
  color: var(--chalk);
}

.page-faq .faq-hero__key-num {
  font-family: var(--font-num);
  font-size: 13px;
  color: var(--neon);
}

.page-faq .faq-hero__figure {
  margin: 0;
}

.page-faq .faq-hero__figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 3;
  object-fit: cover;
}

/* ---------- 筛选条 ---------- */
.page-faq .faq-filter-band {
  border-bottom: var(--rule);
  background: var(--ink-carbon);
  padding: .85rem 0;
}

.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .55rem 1rem;
}

.page-faq .faq-filter__label {
  margin: 0;
  font-family: var(--font-data);
  font-size: 11.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-filter__set {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
}

.page-faq .faq-filter__box {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-faq .faq-filter__pill {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-data);
  font-size: 12.5px;
  letter-spacing: .08em;
  padding: .34rem .85rem;
  border: 1px solid var(--line-blue);
  border-radius: var(--r-pill);
  color: var(--chalk);
  background: transparent;
  cursor: pointer;
  user-select: none;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-filter__pill:hover {
  border-color: var(--neon);
}

.page-faq .faq-filter__box:checked + .faq-filter__pill {
  background: var(--neon);
  border-color: var(--neon);
  color: var(--ink-deep);
  font-weight: 600;
}

.page-faq .faq-filter__box:focus-visible + .faq-filter__pill {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

.page-faq .faq-filter__hint {
  margin: 0;
  font-size: 12px;
  color: var(--mist);
}

/* 纯 CSS 分类筛选：先全部隐藏，再按勾选项恢复 */
.page-faq:has(.faq-filter__box:checked) .faq-card {
  display: none;
}

.page-faq:has(#faq-f-data:checked) .faq-card[data-cat="data"],
.page-faq:has(#faq-f-set:checked) .faq-card[data-cat="set"],
.page-faq:has(#faq-f-acc:checked) .faq-card[data-cat="acc"],
.page-faq:has(#faq-f-scene:checked) .faq-card[data-cat="scene"],
.page-faq:has(#faq-f-feed:checked) .faq-card[data-cat="feed"] {
  display: block;
}

/* ---------- 两列骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.2rem, 3vw, 2.4rem);
  padding-top: clamp(1.5rem, 3.2vw, 2.6rem);
}

.page-faq .faq-index {
  border-top: var(--rule);
  padding-top: .9rem;
}

.page-faq .faq-index__title {
  margin: 0 0 .6rem;
  font-family: var(--font-data);
  font-size: 11.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: .5rem;
  padding: .4rem .6rem;
  border: 1px solid var(--line-blue);
  border-radius: var(--r-s);
  text-decoration: none;
  color: var(--mist);
  font-size: 13px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--chalk);
  border-color: var(--neon);
  background: rgba(70, 227, 164, .08);
}

.page-faq .faq-index__num {
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: -.01em;
  color: var(--neon);
}

/* ---------- 分类分组 ---------- */
.page-faq .faq-group {
  margin-bottom: clamp(1.8rem, 3.6vw, 3rem);
  scroll-margin-top: 90px;
}

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

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .6rem .85rem;
  padding-bottom: .7rem;
  border-bottom: var(--rule);
}

.page-faq .faq-group__code {
  flex: none;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: var(--r-s);
  font-family: var(--font-data);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--ink-deep);
  background: var(--ink-turf);
  border: 1px solid var(--line-blue);
}

.page-faq .faq-group--data .faq-group__code {
  background: var(--neon);
  border-color: var(--neon);
}

.page-faq .faq-group--set .faq-group__code {
  background: var(--amber);
  border-color: var(--amber);
}

.page-faq .faq-group--feed .faq-group__code {
  background: var(--coral);
  border-color: var(--coral);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-title);
  font-size: clamp(19px, 2.1vw, 24px);
  font-weight: 700;
  letter-spacing: -.005em;
  color: var(--chalk);
}

.page-faq .faq-group__note {
  margin: .7rem 0 .2rem;
  max-width: 40em;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 问答卡片 ---------- */
.page-faq .faq-card {
  margin-top: .7rem;
  border: 1px solid var(--line-blue);
  border-left-width: 3px;
  border-radius: 0 var(--r-m) var(--r-m) 0;
  background: var(--ink-carbon);
  scroll-margin-top: 90px;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-card:hover {
  border-color: var(--neon);
}

.page-faq .faq-card[open] {
  background: var(--ink-turf);
  border-left-color: var(--neon);
}

.page-faq .faq-card:target {
  border-color: var(--amber);
  border-left-color: var(--amber);
  background: var(--ink-turf);
}

.page-faq .faq-card__summary {
  display: flex;
  align-items: baseline;
  gap: .85rem;
  padding: .95rem 1rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-title);
  font-size: clamp(15.5px, 1.55vw, 18px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--chalk);
}

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

.page-faq .faq-card__num {
  flex: none;
  padding-top: .08em;
  font-family: var(--font-num);
  font-size: 13.5px;
  color: var(--neon);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-card[open] .faq-card__num {
  color: var(--amber);
}

.page-faq .faq-card:target .faq-card__num {
  color: var(--amber);
}

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

.page-faq .faq-card__chev {
  flex: none;
  align-self: center;
  width: 9px;
  height: 9px;
  border-right: 1.5px solid var(--mist);
  border-bottom: 1.5px solid var(--mist);
  transform: rotate(45deg);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-card[open] .faq-card__chev {
  transform: rotate(-135deg);
  border-color: var(--neon);
}

.page-faq .faq-card__body {
  padding: .9rem 1.1rem 1.2rem;
  border-top: 1px dashed var(--line-blue);
}

.page-faq .faq-card__lead {
  margin: 0 0 .8rem;
  padding: .55rem .85rem;
  border-left: 2px solid var(--neon);
  border-radius: 0 var(--r-s) var(--r-s) 0;
  background: rgba(70, 227, 164, .07);
  font-size: 15px;
  line-height: 1.72;
  color: var(--faq-lead);
}

.page-faq .faq-list {
  margin: 0;
  padding-left: 1.1rem;
  max-width: 42em;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--faq-body);
}

.page-faq .faq-list li + li {
  margin-top: .42rem;
}

.page-faq .faq-list li::marker {
  color: var(--line-blue);
}

.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .5rem;
  max-width: 44em;
}

.page-faq .faq-steps li {
  display: flex;
  align-items: flex-start;
  gap: .7rem;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--faq-body);
}

.page-faq .faq-steps__num {
  flex: none;
  width: 20px;
  height: 20px;
  margin-top: .2em;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--neon);
  color: var(--ink-deep);
  font-family: var(--font-num);
  font-size: 11.5px;
}

.page-faq .faq-inline-link {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(70, 227, 164, .45);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-inline-link:hover,
.page-faq .faq-inline-link:focus-visible {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

.page-faq .faq-inline-link:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

.page-faq .faq-card__foot {
  margin: .9rem 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 三步定位带 ---------- */
.page-faq .faq-route {
  position: relative;
  margin: clamp(1.8rem, 3.6vw, 2.8rem) 0 clamp(2rem, 4vw, 3.2rem);
  border: 1px solid var(--line-blue);
  border-radius: var(--r-l);
  background:
    linear-gradient(180deg, rgba(20, 50, 40, .95), rgba(11, 14, 12, .95));
  overflow: hidden;
}

.page-faq .faq-route::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 5px;
  background: linear-gradient(90deg, var(--neon) 0 52%, var(--amber) 52% 78%, var(--coral) 78% 100%);
  opacity: .85;
}

.page-faq .faq-route__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .6rem .8rem;
  padding: .95rem 1.15rem;
  border-bottom: 1px solid var(--line-blue);
}

.page-faq .faq-route__code {
  font-family: var(--font-data);
  font-size: 11.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ink-deep);
  background: var(--amber);
  border-radius: var(--r-s);
  padding: .2rem .5rem;
}

.page-faq .faq-route__title {
  margin: 0;
  font-family: var(--font-title);
  font-size: clamp(17px, 1.9vw, 22px);
  font-weight: 700;
  color: var(--chalk);
}

.page-faq .faq-route__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.1rem;
  padding: 1rem 1.15rem 1.4rem;
}

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

.page-faq .faq-route__step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .15rem .9rem;
  padding: .7rem 0;
  border-top: 1px dashed var(--line-blue);
  transition: border-color var(--dur) var(--ease);
}

.page-faq .faq-route__step:first-child {
  border-top: none;
  padding-top: .2rem;
}

.page-faq .faq-route__step:hover {
  border-top-color: var(--neon);
}

.page-faq .faq-route__num {
  grid-row: 1 / 3;
  align-self: center;
  font-family: var(--font-num);
  font-size: 22px;
  line-height: 1;
  color: var(--neon);
  opacity: .5;
  transition: opacity var(--dur) var(--ease);
}

.page-faq .faq-route__step:hover .faq-route__num {
  opacity: 1;
}

.page-faq .faq-route__step-title {
  margin: 0;
  font-family: var(--font-title);
  font-size: 16px;
  font-weight: 700;
  color: var(--chalk);
}

.page-faq .faq-route__step p {
  margin: .2rem 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--faq-body);
}

.page-faq .faq-route__figure {
  margin: 0;
}

.page-faq .faq-route__figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--r-m);
}

/* ---------- 桌面栅格 ---------- */
@media (min-width: 880px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: end;
  }

  .page-faq .faq-route__body {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 940px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    column-gap: clamp(1.6rem, 3vw, 2.6rem);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 92px;
    border-top: none;
    border-left: 2px solid var(--line-blue);
    padding: .2rem 0 .2rem 1rem;
  }

  .page-faq .faq-index__list {
    display: grid;
    gap: .15rem;
  }

  .page-faq .faq-index__link {
    border-color: transparent;
    padding: .38rem .5rem;
    font-size: 13.5px;
  }

  .page-faq .faq-index__num {
    min-width: 3.6em;
  }
}

@media (min-width: 1120px) {
  .page-faq .faq-card__body {
    padding: .95rem 1.4rem 1.35rem;
  }

  .page-faq .faq-card__summary {
    padding: 1.05rem 1.4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq * {
    transition-duration: 1ms !important;
  }

  .page-faq .faq-card__chev {
    transition: none;
  }
}