.page-faq {
  --faq-rail: 240px;
  --faq-accent: var(--cyan);
  --faq-accent-soft: rgba(46, 242, 200, .12);
  --faq-accent-line: rgba(46, 242, 200, .34);
  display: block;
}

/* ── 首屏框景 ───────────────────────────── */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(20px, 3.4vw, 40px) 0 clamp(24px, 4vw, 42px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(720px 300px at 16% -6%, rgba(46, 242, 200, .13), transparent 68%),
    radial-gradient(560px 300px at 92% 46%, rgba(108, 75, 214, .18), transparent 70%);
}

.page-faq .faq-hero__frame {
  position: relative;
  overflow: hidden;
  border: var(--line);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(158deg, rgba(12, 31, 27, .96) 0%, rgba(5, 15, 13, .84) 62%, rgba(12, 31, 27, .9) 100%);
  padding: clamp(22px, 4vw, 42px);
  box-shadow: var(--shadow);
}

.page-faq .faq-hero__frame::before {
  content: "";
  position: absolute;
  top: 0;
  left: clamp(22px, 4vw, 42px);
  right: clamp(22px, 4vw, 42px);
  height: 2px;
  background: repeating-linear-gradient(90deg, var(--amber) 0 10px, transparent 10px 22px);
  opacity: .72;
}

.page-faq .faq-hero__frame::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -90px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  border: 1px dashed rgba(255, 209, 102, .22);
  pointer-events: none;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  max-width: 22ch;
  font-family: var(--font-cond);
  font-weight: 800;
  font-size: clamp(27px, 5.4vw, 46px);
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--mist);
}

.page-faq .faq-hero__lead {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--sage);
}

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

/* ── 主体两栏：常驻分类索引 + 问题流 ─────── */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  padding-bottom: clamp(44px, 6vw, 84px);
}

.page-faq .faq-index {
  border: var(--line);
  border-radius: var(--radius-lg);
  background: var(--ink-800);
  padding: 14px 12px 10px;
}

.page-faq .faq-index__title {
  margin: 0 0 10px 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 2px 2px 6px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index__list li {
  flex: 0 0 auto;
  scroll-snap-align: start;
}

.page-faq .faq-index__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--ink-700);
  border-radius: var(--pill);
  background: rgba(5, 15, 13, .55);
  color: var(--mist);
  font-size: 13px;
  line-height: 1.3;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color .24s var(--ease), color .24s var(--ease), background .24s var(--ease);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(46, 242, 200, .09);
}

.page-faq .faq-index__list .index-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--sage);
}

.page-faq .faq-index__note {
  margin: 6px 4px 2px;
  font-size: 12px;
  color: var(--sage);
}

/* ── 分组 ───────────────────────────────── */
.page-faq .faq-stream {
  min-width: 0;
}

.page-faq .faq-group {
  --accent: var(--cyan);
  --accent-soft: rgba(46, 242, 200, .12);
  --accent-line: rgba(46, 242, 200, .34);
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.page-faq .faq-group--amber {
  --accent: var(--amber);
  --accent-soft: rgba(255, 209, 102, .13);
  --accent-line: rgba(255, 209, 102, .36);
}

.page-faq .faq-group--orange {
  --accent: var(--orange);
  --accent-soft: rgba(255, 138, 61, .13);
  --accent-line: rgba(255, 138, 61, .36);
}

.page-faq .faq-group--indigo {
  --accent: var(--indigo);
  --accent-soft: rgba(108, 75, 214, .18);
  --accent-line: rgba(108, 75, 214, .46);
}

.page-faq .faq-group--wine {
  --accent: var(--wine);
  --accent-soft: rgba(140, 31, 69, .22);
  --accent-line: rgba(140, 31, 69, .5);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(34px, 4.6vw, 62px);
  padding-top: clamp(30px, 4.2vw, 54px);
  border-top: 1px solid var(--ink-700);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.page-faq .faq-group__no {
  flex: 0 0 auto;
  margin-top: 2px;
  padding: 4px 12px;
  border: 1px solid var(--accent-line);
  border-radius: var(--pill);
  background: var(--accent-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  line-height: 1.35;
  color: var(--accent);
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-size: clamp(20px, 3.2vw, 28px);
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--mist);
}

.page-faq .faq-group__desc {
  margin: 8px 0 0;
  max-width: 56ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--sage);
}

/* ── 图 ─────────────────────────────────── */
.page-faq .faq-figure {
  margin: 20px 0 0;
}

.page-faq .faq-figure.media-frame {
  border-radius: var(--radius-lg);
}

.page-faq .faq-figure--portrait {
  max-width: 320px;
}

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

/* ── 问题条目 ───────────────────────────── */
.page-faq .faq-steps {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.page-faq .faq-item {
  border: var(--line);
  border-radius: var(--radius-md);
  background: var(--ink-800);
  overflow: hidden;
  transition: border-color .24s var(--ease), background .24s var(--ease);
}

.page-faq .faq-item:hover {
  border-color: var(--accent-line);
}

.page-faq .faq-item[open] {
  border-color: var(--accent-line);
  background: linear-gradient(180deg, var(--accent-soft), rgba(12, 31, 27, 1) 62%);
}

.page-faq .faq-item summary {
  padding: 16px 44px 16px 16px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--mist);
  cursor: pointer;
  transition: box-shadow .24s var(--ease), color .24s var(--ease);
}

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

.page-faq .faq-item[open] summary {
  box-shadow: inset 3px 0 0 var(--accent);
  color: var(--accent);
}

.page-faq .faq-item .accordion-body {
  padding: 0 18px 18px 19px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--sage);
}

.page-faq .faq-item .accordion-body p {
  margin: 0;
}

.page-faq .faq-item .accordion-body p + p {
  margin-top: 10px;
}

/* ── 步骤编号 ───────────────────────────── */
.page-faq .faq-ol {
  counter-reset: faqstep;
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-ol > li {
  counter-increment: faqstep;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.7;
}

.page-faq .faq-ol > li::before {
  content: counter(faqstep, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--accent);
  text-align: center;
  padding-bottom: 4px;
  border-bottom: 2px solid var(--accent-line);
}

.page-faq .faq-ul {
  display: grid;
  gap: 8px;
  margin: 0 0 12px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-ul > li {
  position: relative;
  padding-left: 16px;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.7;
}

.page-faq .faq-ul > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 8px;
  height: 2px;
  background: var(--accent);
}

.page-faq .faq-time {
  display: block;
  margin: 14px 0 0;
  padding-top: 10px;
  border-top: 1px dashed var(--ink-700);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--sage);
}

/* ── 弱网线框 ───────────────────────────── */
.page-faq .faq-wire-wrap {
  display: flex;
  justify-content: center;
  margin: 22px 0 4px;
}

.page-faq .faq-wire {
  display: block;
  width: min(100%, 240px);
  height: auto;
}

/* ── 结尾咨询块 ─────────────────────────── */
.page-faq .faq-tail {
  margin-top: 26px;
}

.page-faq .faq-tail__title {
  margin: 0 0 8px;
  font-family: var(--font-cond);
  font-weight: 800;
  font-size: clamp(17px, 2.4vw, 21px);
  letter-spacing: -.01em;
  color: var(--mist);
}

.page-faq .faq-tail__copy {
  margin: 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
  word-break: break-word;
}

.page-faq .faq-tail .cta-row {
  margin-top: 18px;
}

/* ── 桌面端：索引吸附在左 ───────────────── */
@media (min-width: 980px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    padding: 18px 16px 14px;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding: 0;
  }

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

  .page-faq .faq-index__list a {
    display: flex;
    width: 100%;
    border: 0;
    border-radius: var(--radius-sm);
    background: transparent;
    padding: 9px 10px;
    white-space: normal;
    font-size: 14px;
  }

  .page-faq .faq-index__list a:hover,
  .page-faq .faq-index__list a:focus-visible {
    background: rgba(46, 242, 200, .1);
  }

  .page-faq .faq-index__note {
    margin-top: 12px;
    padding-top: 10px;
    border-top: 1px solid var(--ink-700);
  }

  .page-faq .faq-group__head h2 {
    letter-spacing: -.02em;
  }

  .page-faq .faq-figure--portrait {
    max-width: 300px;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-item summary {
    font-size: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-index__list a,
  .page-faq .faq-item summary {
    transition: none;
  }
}
</main>