.page-faq {
  --faq-card: rgba(16, 27, 68, .74);
  --faq-shadow: 0 24px 60px rgba(4, 7, 20, .55);
  display: block;
}

.page-faq .faq-crumbs {
  padding-block: .4rem 1rem;
}

.page-faq .faq-crumbs .breadcrumbs {
  font-size: .82rem;
  letter-spacing: .05em;
  color: var(--mist);
}

.page-faq .faq-crumbs .breadcrumbs a {
  color: var(--mist);
  text-decoration: none;
}

.page-faq .faq-crumbs .breadcrumbs a:hover {
  color: var(--cyan);
}

.page-faq .faq-crumbs .breadcrumb-current {
  color: var(--body-dark);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  display: grid;
  gap: clamp(2.4rem, 7vw, 3.4rem);
  align-items: center;
  padding-block: clamp(1.2rem, 4vw, 2.6rem) clamp(2.8rem, 8vw, 5.6rem);
}

.page-faq .faq-hero__lead {
  max-width: 44rem;
}

.page-faq .faq-hero h1 {
  margin: .9rem 0 1rem;
  font-size: clamp(2.2rem, 7.6vw, 4.4rem);
  line-height: 1.06;
  letter-spacing: -.02em;
  font-weight: 900;
  color: var(--white);
}

.page-faq .faq-hero .lede {
  max-width: 38rem;
  color: var(--mist);
  font-size: clamp(1rem, 1.7vw, 1.08rem);
  line-height: 1.85;
}

.page-faq .faq-deck {
  position: relative;
  width: 100%;
  max-width: 380px;
  aspect-ratio: 1 / 1;
  margin-inline: auto;
}

.page-faq .faq-deck__card {
  position: absolute;
  left: 0;
  width: 70%;
  display: flex;
  align-items: center;
  gap: .7rem;
  padding: .85rem 1rem;
  border-radius: 16px;
  background: linear-gradient(140deg, var(--faq-card), rgba(7, 11, 31, .92));
  border: 1px solid var(--line-dark);
  box-shadow: var(--faq-shadow);
  font-size: .88rem;
  font-weight: 600;
  color: var(--body-dark);
}

.page-faq .faq-deck__card:nth-child(1) {
  top: 2%;
  left: 0;
  transform: rotate(-2deg);
  border-color: rgba(108, 75, 216, .45);
}

.page-faq .faq-deck__card:nth-child(2) {
  top: 27%;
  left: 12%;
  transform: rotate(1.5deg);
  border-color: rgba(63, 224, 208, .4);
}

.page-faq .faq-deck__card:nth-child(3) {
  top: 52%;
  left: 24%;
  transform: rotate(-1deg);
  border-color: rgba(240, 169, 59, .45);
}

.page-faq .faq-deck__card:nth-child(4) {
  top: 77%;
  left: 30%;
  transform: rotate(2deg);
  border-color: rgba(226, 84, 44, .45);
}

.page-faq .faq-deck__num {
  font-size: .95rem;
  font-weight: 900;
  letter-spacing: .06em;
  color: var(--amber);
}

.page-faq .faq-deck__card:nth-child(1) .faq-deck__num { color: var(--neon); }
.page-faq .faq-deck__card:nth-child(2) .faq-deck__num { color: var(--cyan); }
.page-faq .faq-deck__card:nth-child(4) .faq-deck__num { color: var(--ember); }

.page-faq .faq-hero__note {
  position: absolute;
  right: -1.4rem;
  top: 46%;
  display: none;
  font-size: .7rem;
  color: var(--mist);
}

/* ---------- 索引 ---------- */
.page-faq .faq-index {
  padding-block: clamp(2.2rem, 6vw, 4rem);
}

.page-faq .faq-index__top {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.8rem);
  align-items: center;
}

.page-faq .faq-index__top .display-2 {
  margin: .5rem 0 .7rem;
}

.page-faq .faq-index__top .prose {
  color: var(--mist);
  max-width: 40rem;
}

.page-faq .faq-index__fig {
  width: min(100%, 320px);
  margin-inline: auto;
}

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

.page-faq .faq-filter {
  position: sticky;
  top: calc(var(--header-h) + .5rem);
  z-index: 6;
  margin-top: clamp(1.6rem, 4vw, 2.4rem);
  padding: .5rem .6rem;
  border-radius: var(--r-pill);
  background: rgba(7, 11, 31, .84);
  backdrop-filter: blur(12px);
  border: 1px solid var(--line-dark);
  box-shadow: 0 14px 34px rgba(4, 7, 20, .5);
}

.page-faq .faq-filter .filter-btn {
  border-radius: var(--r-pill);
  font-size: .82rem;
  letter-spacing: .04em;
}

.page-faq .faq-filter .filter-btn[aria-pressed="true"] {
  border-color: var(--neon);
  box-shadow: 0 0 0 1px rgba(108, 75, 216, .5) inset;
  color: var(--white);
}

/* ---------- 分组问答 ---------- */
.page-faq .faq-groups {
  display: block;
}

.page-faq .faq-group {
  position: relative;
  overflow: hidden;
  padding-block: clamp(2.2rem, 6vw, 3.8rem);
  border-top: 1px solid var(--line-dark);
}

.page-faq .faq-groups > .faq-group:first-child {
  border-top: 0;
}

.page-faq .faq-group__head {
  position: relative;
  max-width: 60rem;
}

.page-faq .faq-group__head .display-2 {
  position: relative;
  z-index: 1;
  margin-bottom: .5rem;
}

.page-faq .faq-group__head .prose {
  position: relative;
  z-index: 1;
  color: var(--mist);
  max-width: 44rem;
}

.page-faq .faq-group .chapter-num {
  position: absolute;
  top: -1.8rem;
  right: -.4rem;
  z-index: 0;
  font-size: clamp(5rem, 18vw, 10.5rem);
  line-height: .75;
  font-weight: 900;
  color: rgba(185, 192, 216, .09);
  pointer-events: none;
  user-select: none;
}

.page-faq .faq-group__body {
  display: grid;
  gap: clamp(1.6rem, 3.5vw, 2.6rem);
  margin-top: clamp(1.3rem, 3vw, 2rem);
}

.page-faq .qa-list {
  display: grid;
  gap: .65rem;
}

.page-faq .qa {
  border: 1px solid var(--line-dark);
  border-left: 3px solid var(--amber);
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(16, 27, 68, .72), rgba(7, 11, 31, .55));
  overflow: hidden;
  transition: border-color .3s var(--ease), background .3s var(--ease);
}

.page-faq .qa[open] {
  border-left-color: var(--neon);
  background: linear-gradient(180deg, rgba(43, 27, 77, .72), rgba(7, 11, 31, .6));
}

.page-faq .qa__q {
  display: flex;
  align-items: baseline;
  gap: .85rem;
  padding: 1.05rem 1.15rem;
  cursor: pointer;
  list-style: none;
  color: var(--body-dark);
  font-size: clamp(.95rem, 1.5vw, 1.02rem);
  font-weight: 600;
  line-height: 1.65;
}

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

.page-faq .qa__q::after {
  content: "+";
  margin-left: auto;
  flex: none;
  color: var(--cyan);
  font-size: 1.15rem;
  line-height: 1;
}

.page-faq .qa[open] .qa__q::after {
  content: "–";
  color: var(--neon);
}

.page-faq .qa__num {
  flex: none;
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .1em;
  color: var(--amber);
  padding-top: .18rem;
}

.page-faq .qa__text {
  flex: 1 1 auto;
}

.page-faq .qa__a {
  padding: 0 1.15rem 1.2rem;
  color: var(--mist);
  font-size: .94rem;
  line-height: 1.88;
}

.page-faq .qa__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 224, 208, .45);
}

.page-faq .qa__a a:hover {
  color: var(--white);
}

.page-faq .faq-group__media {
  border-radius: var(--r-lg);
  overflow: hidden;
}

/* ---------- 帮助文档结构 ---------- */
.page-faq .faq-doc {
  padding-block: clamp(2.4rem, 6vw, 4.4rem);
  border-top: 1px solid var(--line-dark);
}

.page-faq .faq-doc .display-2 {
  margin: .5rem 0 .7rem;
}

.page-faq .faq-doc .prose {
  color: var(--mist);
  max-width: 48rem;
}

.page-faq .faq-doc__panel {
  margin-top: clamp(1.4rem, 3vw, 2.2rem);
  padding: clamp(.8rem, 3vw, 2rem);
  border-radius: var(--r-lg);
  background: linear-gradient(150deg, rgba(16, 27, 68, .82), rgba(43, 27, 77, .38));
  border: 1px solid var(--line-dark);
  box-shadow: var(--faq-shadow);
}

.page-faq .doc-svg {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- 仍未解决 ---------- */
.page-faq .faq-help {
  padding-block: clamp(2.4rem, 6vw, 4.4rem);
}

.page-faq .faq-help__card {
  position: relative;
  padding: clamp(1.6rem, 4vw, 3rem);
  border-radius: var(--r-lg);
  border: 1px solid rgba(63, 224, 208, .45);
  background: linear-gradient(160deg, rgba(16, 27, 68, .92), rgba(7, 11, 31, .88));
  box-shadow: 0 0 0 1px rgba(63, 224, 208, .08), 0 26px 60px rgba(4, 7, 20, .55);
}

.page-faq .faq-help__card .display-2 {
  margin: 1rem 0 .7rem;
}

.page-faq .faq-help__card .lede {
  color: var(--mist);
  max-width: 44rem;
}

.page-faq .faq-steps {
  counter-reset: faqstep;
  display: grid;
  gap: .75rem;
  margin: 1.4rem 0;
  padding: 0;
  list-style: none;
  max-width: 52rem;
}

.page-faq .faq-steps li {
  position: relative;
  padding-left: 3rem;
  color: var(--body-dark);
  font-size: .95rem;
  line-height: 1.8;
}

.page-faq .faq-steps li::before {
  counter-increment: faqstep;
  content: "0" counter(faqstep);
  position: absolute;
  left: 0;
  top: .28rem;
  padding: .1rem .38rem;
  border: 1px solid rgba(63, 224, 208, .45);
  border-radius: 8px;
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-faq .faq-help__note {
  max-width: 48rem;
  color: var(--mist);
  font-size: .92rem;
  line-height: 1.85;
}

.page-faq .faq-help__card .btn {
  margin-top: 1.4rem;
}

/* ---------- 页尾行动 ---------- */
.page-faq .faq-cta {
  padding-block: clamp(2.4rem, 6vw, 4.2rem) clamp(3rem, 8vw, 5.4rem);
}

.page-faq .faq-cta__paper {
  position: relative;
  overflow: hidden;
  padding: clamp(1.6rem, 4vw, 3.2rem);
  border-radius: var(--r-lg);
  background: var(--paper);
  color: var(--body-paper);
  box-shadow: 0 30px 70px rgba(4, 7, 20, .62);
}

.page-faq .faq-cta__paper::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 5px;
  background: linear-gradient(90deg, var(--neon), var(--cyan) 55%, var(--amber));
}

.page-faq .faq-cta__paper .display-2 {
  color: var(--body-paper);
  margin-bottom: .8rem;
}

.page-faq .faq-cta__paper p {
  max-width: 46rem;
  color: var(--body-paper);
  line-height: 1.85;
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: 1.5rem;
}

.page-faq .faq-cta__paper .btn--ghost {
  color: var(--body-paper);
  border-color: var(--line-paper);
}

.page-faq .faq-cta__paper .btn--ghost:hover {
  color: var(--ember);
  border-color: var(--ember);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-index__top {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .7fr);
  }

  .page-faq .faq-index__fig {
    margin-inline: 0 0;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
  }

  .page-faq .faq-group--split .faq-group__body {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, .68fr);
    align-items: start;
  }

  .page-faq .faq-group__media {
    position: sticky;
    top: calc(var(--header-h) + 2rem);
  }
}

@media (min-width: 1120px) {
  .page-faq .faq-hero__note {
    display: block;
  }

  .page-faq .faq-group__head {
    padding-right: 6rem;
  }
}

@media (max-width: 620px) {
  .page-faq .faq-deck {
    max-width: 300px;
  }

  .page-faq .faq-deck__card {
    font-size: .8rem;
    padding: .7rem .85rem;
  }

  .page-faq .faq-filter {
    top: calc(var(--header-h) + .3rem);
    justify-content: center;
  }

  .page-faq .faq-steps li {
    padding-left: 2.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .faq-deck__card {
    transition: none;
  }
}