.page-faq {
  --faq-ink: #10141C;
  --faq-edge: 2px;
  background: var(--bg);
  color: var(--txt);
  font-family: var(--font-body);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 26px 0 40px;
  border-bottom: var(--faq-edge) solid var(--line);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(107, 78, 255, 0.30), transparent 58%),
    radial-gradient(90% 70% at 0% 100%, rgba(0, 229, 255, 0.10), transparent 60%),
    var(--bg);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(216, 222, 233, 0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(216, 222, 233, 0.06) 1px, transparent 1px);
  background-size: 32px 32px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent);
}

.page-faq .faq-hero__in {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 26px;
}

.page-faq .faq-hero__kick {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--nebula);
}

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 7.2vw, 52px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  text-shadow: 0 0 12px rgba(0, 229, 255, 0.28);
}

.page-faq .faq-hero__sub {
  max-width: 56ch;
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--txt-dim);
}

.page-faq .faq-hero__jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__jump a {
  display: inline-block;
  padding: 7px 12px;
  border: var(--faq-edge) solid var(--line-2);
  color: var(--txt-dim);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-faq .faq-hero__jump a:hover,
.page-faq .faq-hero__jump a:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  transform: translateY(-2px);
}

.page-faq .faq-hero__art {
  margin: 0;
  border: var(--faq-edge) solid var(--line-2);
  box-shadow: var(--shadow-hard);
  background: var(--surf-2);
  overflow: hidden;
}

.page-faq .faq-hero__art img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1100 / 700;
  object-fit: cover;
}

/* ---------- 正文骨架 ---------- */
.page-faq .faq-body {
  padding: 40px 0 64px;
}

.page-faq .faq-body__in {
  display: grid;
  gap: 32px;
}

/* ---------- 分类索引 ---------- */
.page-faq .faq-index__head {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--txt-dim);
}

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

.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: var(--faq-edge) solid var(--line);
  background: var(--surf-2);
  color: var(--txt-dim);
  font-size: 14px;
  text-decoration: none;
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.page-faq .faq-index__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--nebula);
}

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

/* ---------- 问答分组 ---------- */
.page-faq .faq-groups {
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--ticker) + 20px);
  padding-bottom: 36px;
}

.page-faq .faq-group + .faq-group {
  border-top: var(--faq-edge) solid var(--line);
  padding-top: 34px;
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.page-faq .faq-group__no {
  padding: 3px 8px;
  border: var(--faq-edge) solid var(--nebula);
  color: var(--cyan-soft);
  background: rgba(107, 78, 255, 0.18);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 3.6vw, 27px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--txt);
}

.page-faq .faq-group__title::before {
  content: "";
  display: inline-block;
  width: 20px;
  height: 3px;
  margin-right: 10px;
  vertical-align: middle;
  background: var(--cyan);
}

/* ---------- 问答条目 ---------- */
.page-faq .qa {
  margin-bottom: 12px;
  border: var(--faq-edge) solid var(--line);
  background: var(--surf-2);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-faq .qa:hover {
  border-color: var(--line-2);
}

.page-faq .qa[open] {
  border-color: var(--cyan);
  background: var(--surf);
  box-shadow: var(--shadow-mid);
}

.page-faq .qa__sum {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--txt);
  transition: color 0.2s var(--ease);
}

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

.page-faq .qa[open] .qa__sum {
  color: var(--accent-text);
}

.page-faq .qa__ico {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  margin-top: 1px;
  border: var(--faq-edge) solid var(--line-2);
  color: var(--txt-dim);
  transition: transform 0.24s var(--ease), border-color 0.24s var(--ease), color 0.24s var(--ease);
}

.page-faq .qa__ico svg {
  display: block;
  width: 12px;
  height: 12px;
}

.page-faq .qa[open] .qa__ico {
  transform: rotate(45deg);
  border-color: var(--cyan);
  color: var(--cyan);
}

.page-faq .qa__body {
  padding: 14px 16px 18px;
  border-top: var(--faq-edge) solid var(--cyan);
  background: var(--paper-solid);
  color: var(--faq-ink);
}

.page-faq .qa__body p {
  max-width: 62ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
}

.page-faq .qa__body a {
  color: #2B1E86;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .qa__body a:hover {
  color: #6B4EFF;
}

/* ---------- 反馈章节 ---------- */
.page-faq .faq-report__grid {
  display: grid;
  gap: 20px;
}

.page-faq .faq-report__art {
  margin: 0;
  border: var(--faq-edge) solid var(--line-2);
  box-shadow: var(--shadow-mid);
  background: var(--surf-2);
  overflow: hidden;
}

.page-faq .faq-report__art img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 900 / 600;
  object-fit: cover;
}

.page-faq .faq-report__lead {
  margin: 26px 0 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  color: var(--txt);
}

.page-faq .faq-steps {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-steps__item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 13px 15px;
  border-left: 3px solid var(--nebula);
  background: var(--surf-2);
  box-shadow: var(--shadow-mid);
}

.page-faq .faq-steps__no {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1.25;
  color: var(--data);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-steps__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--txt-dim);
}

.page-faq .faq-report__more {
  margin: 24px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--txt-dim);
}

.page-faq .faq-report__more a {
  color: var(--accent-text);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-report__more a:hover {
  color: var(--ember);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 46px 0 58px;
  }

  .page-faq .faq-hero__in {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: end;
    gap: 44px;
  }

  .page-faq .faq-body {
    padding: 56px 0 84px;
  }

  .page-faq .faq-body__in {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--ticker) + 24px);
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 4px;
    border-left: var(--faq-edge) solid var(--line);
  }

  .page-faq .faq-index__link {
    width: 100%;
    padding: 9px 12px;
    border: 0;
    background: none;
    font-size: 14.5px;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    transform: translateX(6px);
  }

  .page-faq .faq-group__head {
    margin-bottom: 22px;
  }

  .page-faq .qa__sum {
    padding: 17px 20px;
    font-size: 16.5px;
  }

  .page-faq .qa__body {
    padding: 16px 20px 22px;
  }

  .page-faq .faq-report__grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: 26px;
    align-items: start;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__ico,
  .page-faq .qa__sum,
  .page-faq .faq-index__link,
  .page-faq .faq-hero__jump a {
    transition-duration: 0.12s;
  }

  .page-faq .qa[open] .qa__ico {
    transform: none;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible,
  .page-faq .faq-hero__jump a:hover,
  .page-faq .faq-hero__jump a:focus-visible {
    transform: none;
  }
}