.page-faq {
  --faq-gap: clamp(1.5rem, 4vw, 3rem);
  --faq-cut: 10px;
  padding-bottom: clamp(2.5rem, 6vw, 5rem);
  background:
    radial-gradient(900px 480px at 84% -10%, rgba(139, 92, 246, .30), transparent 66%),
    radial-gradient(720px 420px at 2% 14%, rgba(47, 107, 255, .18), transparent 70%),
    var(--ink);
  color: var(--white);
}

.page-faq .breadcrumb {
  padding-top: clamp(1rem, 3vw, 1.75rem);
}

.page-faq .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .4rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--mist);
}

.page-faq .breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
}

.page-faq .breadcrumb li::after {
  content: "/";
  color: var(--line);
}

.page-faq .breadcrumb li:last-child::after {
  content: none;
}

.page-faq .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s ease, border-color .18s ease;
}

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(1.5rem, 4.5vw, 3rem) 0 clamp(1.5rem, 4vw, 2.5rem);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(245, 243, 255, .035) 0 1px,
    transparent 1px 4px
  );
}

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

.page-faq .faq-hero .eyebrow {
  margin: 0 0 .85rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-faq .faq-hero h1 {
  margin: 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 7vw, 4.2rem);
  line-height: 1.06;
  letter-spacing: -.01em;
  color: var(--white);
  text-shadow: 0 0 42px rgba(139, 92, 246, .45);
}

.page-faq .faq-hero .lede {
  margin: 1rem 0 0;
  max-width: 62ch;
  font-size: clamp(.95rem, 2.2vw, 1.06rem);
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 检索框 ---------- */
.page-faq .faq-search {
  display: flex;
  align-items: center;
  gap: .7rem;
  margin-top: clamp(1.25rem, 3vw, 1.85rem);
  padding: .55rem .9rem;
  max-width: 44rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--amber);
  background: linear-gradient(120deg, rgba(27, 16, 48, .95), rgba(13, 18, 38, .92));
  transition: border-color .18s ease, box-shadow .18s ease;
}

.page-faq .faq-search:focus-within {
  border-color: var(--amber);
  box-shadow: 0 0 0 2px var(--amber-soft);
}

.page-faq .faq-search__key {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .16em;
  color: var(--amber);
  padding: .3rem .45rem;
  border: 1px solid rgba(255, 176, 32, .45);
}

.page-faq .faq-search__field {
  flex: 1 1 auto;
  min-width: 0;
  display: block;
}

.page-faq .faq-search__sr {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.page-faq .faq-search__input {
  display: block;
  width: 100%;
  min-width: 0;
  border: 0;
  background: transparent;
  color: var(--white);
  font-family: var(--font-body);
  font-size: .95rem;
  line-height: 1.6;
  padding: .5rem 0;
}

.page-faq .faq-search__input::placeholder {
  color: rgba(184, 168, 217, .8);
}

.page-faq .faq-search__input:focus {
  outline: none;
}

.page-faq .faq-search__hint {
  margin: .6rem 0 0;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .04em;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 首屏数据 ---------- */
.page-faq .faq-stats {
  list-style: none;
  margin: clamp(1.25rem, 3vw, 1.85rem) 0 0;
  padding: 1px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-faq .faq-stats li {
  display: flex;
  flex-direction: column;
  gap: .2rem;
  padding: .8rem .7rem;
  background: rgba(13, 18, 38, .92);
}

.page-faq .faq-stat-val {
  font-family: var(--font-mono);
  font-size: clamp(1.1rem, 3.6vw, 1.55rem);
  font-weight: 700;
  color: var(--cyan);
}

.page-faq .faq-stat-key {
  font-size: .7rem;
  letter-spacing: .05em;
  line-height: 1.5;
  color: var(--mist);
}

/* ---------- 主体双栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  padding-top: clamp(1.5rem, 4vw, 2.75rem);
}

/* ---------- 左侧目录 ---------- */
.page-faq .faq-index {
  padding: 1rem;
  border: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(27, 16, 48, .94), rgba(8, 6, 15, .92));
}

.page-faq .faq-index__title {
  margin: 0 0 .85rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .2em;
  color: var(--amber);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .25rem;
}

.page-faq .faq-index__list a {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .55rem .55rem .55rem .7rem;
  font-size: .92rem;
  color: var(--mist);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color .18s ease, background .18s ease, border-color .18s ease;
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--white);
  border-left-color: var(--amber);
  background: var(--violet-soft);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: .7rem;
  color: var(--violet);
}

.page-faq .faq-index__card {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-index__card figure {
  margin: 0;
}

.page-faq .faq-index__card img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line-soft);
}

.page-faq .faq-index__card p {
  margin: .7rem 0 .85rem;
  font-size: .82rem;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 分组 ---------- */
.page-faq .qa-group {
  margin: 0 0 clamp(2rem, 5vw, 3rem);
  scroll-margin-top: 5.5rem;
}

.page-faq .qa-group__head {
  display: flex;
  align-items: baseline;
  gap: .7rem;
  margin-bottom: 1rem;
  padding-bottom: .6rem;
  border-bottom: 1px solid var(--line);
  box-shadow: inset 0 -2px 0 -1px rgba(139, 92, 246, .55);
}

.page-faq .qa-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.3rem, 3.8vw, 1.8rem);
  letter-spacing: .01em;
  color: var(--white);
}

.page-faq .qa-group__tag {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .1em;
  color: var(--cyan);
  white-space: nowrap;
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa {
  margin-bottom: .7rem;
  border: 1px solid var(--line-soft);
  border-left: 3px solid transparent;
  background: linear-gradient(160deg, rgba(27, 16, 48, .92), rgba(13, 18, 38, .78));
  transition: border-color .18s ease, background .18s ease;
}

.page-faq .qa:hover {
  border-color: rgba(139, 92, 246, .55);
}

.page-faq .qa[open] {
  border-left-color: var(--amber);
  border-color: rgba(139, 92, 246, .55);
  background: linear-gradient(160deg, rgba(27, 16, 48, 1), rgba(13, 18, 38, .92));
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: .7rem;
  padding: .9rem 1rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1rem, 2.5vw, 1.1rem);
  line-height: 1.45;
  color: var(--white);
}

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

.page-faq .qa__q::after {
  content: "+";
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1.3;
  color: var(--violet);
  transition: color .18s ease;
}

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

.page-faq .qa__num {
  flex: 0 0 auto;
  padding-top: .2rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--cyan);
}

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

.page-faq .qa__body {
  padding: 0 1rem 1rem;
  font-size: .94rem;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .qa__body p {
  margin: .85rem 0 0;
  padding-top: .85rem;
  border-top: 1px solid rgba(58, 42, 90, .6);
}

.page-faq .qa__body p:first-child {
  border-top: 1px solid var(--line-soft);
}

.page-faq .qa__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 211, 238, .5);
  transition: color .18s ease, border-color .18s ease;
}

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

.page-faq .qa__body ul {
  margin: .75rem 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .qa__body li {
  position: relative;
  margin-bottom: .45rem;
  padding-left: 1rem;
}

.page-faq .qa__body li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 5px;
  height: 5px;
  background: var(--cyan);
}

/* ---------- 配图 ---------- */
.page-faq .qa-figure {
  margin: 0 0 .9rem;
  border: 1px solid var(--line-soft);
  background: var(--deep);
}

.page-faq .qa-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .qa-figure figcaption {
  padding: .6rem .85rem;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .06em;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 收尾区块 ---------- */
.page-faq .qa-help {
  position: relative;
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
  padding: clamp(1.25rem, 4vw, 2rem);
  border: 1px solid rgba(255, 176, 32, .42);
  background: linear-gradient(150deg, rgba(255, 176, 32, .14), rgba(13, 18, 38, .92) 58%);
  scroll-margin-top: 5.5rem;
}

.page-faq .qa-help::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 4px;
  background: var(--amber);
}

.page-faq .qa-help__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.2rem, 3.4vw, 1.6rem);
  line-height: 1.35;
  color: var(--white);
}

.page-faq .qa-help__text {
  margin: .8rem 0 0;
  max-width: 60ch;
  font-size: .94rem;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .qa-help__contacts {
  list-style: none;
  margin: 1.1rem 0 1.35rem;
  padding: 0;
  display: grid;
  gap: .5rem;
  font-size: .9rem;
}

.page-faq .qa-help__contacts li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .5rem;
  padding-bottom: .5rem;
  border-bottom: 1px solid rgba(58, 42, 90, .55);
}

.page-faq .qa-help__key {
  flex: 0 0 auto;
  min-width: 4.6rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .1em;
  color: var(--amber);
}

.page-faq .qa-help__val {
  color: var(--white);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s ease, border-color .18s ease;
  word-break: break-word;
}

.page-faq a.qa-help__val:hover,
.page-faq a.qa-help__val:focus-visible {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero .lede {
    font-size: 1.05rem;
  }

  .page-faq .faq-stats li {
    padding: 1rem .95rem;
  }

  .page-faq .qa__q {
    padding: 1rem 1.15rem;
  }

  .page-faq .qa__body {
    padding: 0 1.15rem 1.15rem;
  }
}

@media (min-width: 940px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(220px, 272px) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 1.5rem;
  }

  .page-faq .faq-hero h1 {
    max-width: 20ch;
  }
}

@media (min-width: 1180px) {
  .page-faq .qa-figure {
    margin-bottom: 1.1rem;
  }

  .page-faq .qa-figure img {
    max-height: 340px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__q::after,
  .page-faq .faq-index__list a,
  .page-faq .faq-search,
  .page-faq .qa__body a,
  .page-faq .qa-help__val {
    transition: none;
  }
}