.page-faq {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--navy-deep);
  border-bottom: 2px solid var(--rule-strong);
}

.page-faq .faq-hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.page-faq .faq-hero__bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 32%;
  opacity: .32;
  filter: grayscale(.35) contrast(1.12);
}

.page-faq .faq-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(5, 12, 26, .55) 0%, rgba(5, 12, 26, .93) 68%, var(--navy-deep) 100%),
    repeating-linear-gradient(90deg, rgba(233, 242, 239, .05) 0 1px, transparent 1px 88px);
}

.page-faq .faq-hero .wrap {
  position: relative;
  padding-top: clamp(40px, 7vw, 96px);
  padding-bottom: clamp(32px, 5vw, 72px);
}

.page-faq .faq-hero__title {
  margin: 16px 0 0;
  max-width: 18em;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: var(--fs-6);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--mist);
}

.page-faq .faq-hero__lede {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: var(--fs-4);
  line-height: 1.85;
  color: var(--text);
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin: clamp(26px, 4vw, 48px) 0 0;
  padding: 0;
  border-top: 1px solid var(--rule-strong);
}

.page-faq .faq-stat {
  margin: 0;
  padding: 16px 12px 16px 0;
  border-bottom: 1px solid var(--rule);
}

.page-faq .faq-stat__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-5);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-stat__label {
  margin-top: 6px;
  font-size: var(--fs-1);
  line-height: 1.5;
  letter-spacing: .08em;
  color: var(--text-dim);
}

/* ---------- 主题导航 ---------- */
.page-faq .faq-body {
  background: var(--bg);
}

.page-faq .scope-nav {
  background: var(--grass-deep);
  border-bottom: 2px solid var(--rule-strong);
}

.page-faq .scope-nav__list {
  display: flex;
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .scope-nav__list li {
  flex: 0 0 auto;
}

.page-faq .scope-nav__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 15px 18px;
  border-right: 1px solid var(--rule);
  font-family: var(--font-display);
  font-weight: 300;
  font-size: var(--fs-3);
  letter-spacing: .01em;
  white-space: nowrap;
  color: var(--text-dim);
  text-decoration: none;
  transition: color .18s ease-out, background-color .18s ease-out;
}

.page-faq .scope-nav__link:hover,
.page-faq .scope-nav__link:focus-visible {
  color: var(--accent);
  background: rgba(53, 224, 208, .08);
}

.page-faq .scope-nav__idx {
  font-family: var(--font-mono);
  font-size: var(--fs-1);
  letter-spacing: .16em;
  color: var(--steel);
}

/* ---------- 分组面板 ---------- */
.page-faq .scopes {
  padding-top: clamp(30px, 5vw, 64px);
  padding-bottom: clamp(30px, 5vw, 64px);
}

.page-faq .scope {
  display: block;
  scroll-margin-top: 24px;
}

@supports selector(:has(*)) {
  .page-faq .scope {
    display: none;
  }

  .page-faq .scopes:not(:has(.scope:target)) .scope:first-of-type {
    display: block;
  }

  .page-faq .scope:target {
    display: block;
  }
}

.page-faq .scope .section-head {
  margin-bottom: clamp(16px, 3vw, 28px);
}

/* ---------- 问答条目 ---------- */
.page-faq .qa-list {
  border-top: 1px solid var(--rule);
}

.page-faq .qa-list--after {
  margin-top: clamp(24px, 4vw, 40px);
}

.page-faq .qa {
  border-bottom: 1px solid var(--rule);
}

.page-faq .qa__q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: var(--fs-4);
  line-height: 1.4;
  color: var(--text);
  transition: color .18s ease-out;
}

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

.page-faq .qa__q:hover {
  color: var(--accent);
}

.page-faq .qa__q::after {
  content: "+";
  margin-left: auto;
  padding-left: 16px;
  font-family: var(--font-mono);
  font-size: var(--fs-4);
  line-height: 1;
  color: var(--accent);
  transition: color .18s ease-out;
}

.page-faq .qa[open] .qa__q {
  color: var(--mist);
}

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

.page-faq .qa__idx {
  flex: 0 0 auto;
  padding-top: .3em;
  font-family: var(--font-mono);
  font-size: var(--fs-1);
  letter-spacing: .14em;
  color: var(--steel);
}

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

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

.page-faq .qa__body {
  padding: 0 0 20px 30px;
}

.page-faq .qa__body p {
  margin: 0 0 10px;
  max-width: 34em;
  font-size: var(--fs-3);
  line-height: 1.85;
  color: var(--text);
}

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

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

/* ---------- 勘误流程 ---------- */
.page-faq .correction {
  border: 2px solid var(--rule-strong);
  background: var(--bg-sunk);
  box-shadow: var(--shadow-hard);
}

.page-faq .correction__media img {
  display: block;
  width: 100%;
  height: auto;
  border-bottom: 2px solid var(--rule-strong);
  opacity: .88;
  filter: saturate(.6);
}

.page-faq .correction__body {
  padding: clamp(18px, 3.5vw, 32px);
}

.page-faq .correction__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: var(--fs-4);
  letter-spacing: -.01em;
  color: var(--mist);
}

.page-faq .correction__title--tight {
  margin-top: 30px;
}

.page-faq .flow {
  display: grid;
  grid-template-columns: 1fr;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--rule);
}

.page-faq .flow__step {
  padding: 14px 0;
  border-bottom: 1px solid var(--rule);
}

.page-faq .flow__num {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: var(--fs-1);
  letter-spacing: .16em;
  color: var(--accent);
}

.page-faq .flow__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: var(--fs-4);
  color: var(--mist);
}

.page-faq .flow__text {
  margin: 0;
  font-size: var(--fs-3);
  line-height: 1.85;
  color: var(--text);
}

.page-faq .checklist {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--rule);
}

.page-faq .checklist__item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--rule);
  font-size: var(--fs-3);
  line-height: 1.7;
  color: var(--text);
}

.page-faq .checklist__item input {
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  margin: 6px 0 0;
  accent-color: var(--cyan);
}

.page-faq .checklist__item label {
  cursor: pointer;
}

/* ---------- 收尾 ---------- */
.page-faq .faq-outro {
  border-top: 2px solid var(--rule-strong);
  background: var(--indigo-deep);
}

.page-faq .faq-outro .wrap {
  padding-top: clamp(32px, 5vw, 64px);
  padding-bottom: clamp(32px, 5vw, 64px);
}

.page-faq .faq-outro__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: var(--fs-5);
  line-height: 1.15;
  letter-spacing: -.02em;
  color: var(--mist);
}

.page-faq .faq-outro__text {
  margin: 16px 0 0;
  max-width: 34em;
  font-size: var(--fs-3);
  line-height: 1.85;
  color: var(--text);
}

.page-faq .faq-outro__aside {
  margin-top: 28px;
}

.page-faq .faq-outro__aside-text {
  margin: 0 0 18px;
  max-width: 34em;
  font-size: var(--fs-3);
  line-height: 1.85;
  color: var(--text);
}

.page-faq .faq-outro__aside .btn {
  display: inline-block;
  text-decoration: none;
}

.page-faq .faq-outro__aside .source {
  margin-top: 22px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero__title {
    font-size: var(--fs-7);
  }

  .page-faq .qa__q {
    font-size: var(--fs-5);
  }

  .page-faq .qa__body {
    padding-left: 44px;
  }

  .page-faq .correction__title {
    font-size: var(--fs-5);
  }
}

@media (min-width: 760px) {
  .page-faq .faq-hero__stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-faq .faq-stat {
    padding: 18px 20px 18px 0;
    border-bottom: none;
    border-right: 1px solid var(--rule);
  }

  .page-faq .faq-stat:last-child {
    border-right: none;
  }
}

@media (min-width: 900px) {
  .page-faq .flow {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-faq .flow__step {
    padding: 18px 18px 18px 0;
    border-bottom: none;
    border-right: 1px solid var(--rule);
  }

  .page-faq .flow__step:last-child {
    border-right: none;
    padding-right: 0;
  }

  .page-faq .faq-outro__aside {
    margin-top: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .scope-nav__link,
  .page-faq .qa__q,
  .page-faq .qa__q::after {
    transition: none;
  }
}