.page-faq {
  --faq-line: rgba(167, 243, 228, .16);
  --faq-soft: rgba(167, 243, 228, .07);
  --faq-cyan-line: rgba(53, 240, 208, .34);
  background: var(--scene-800);
  color: var(--ink);
  padding-bottom: 88px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: 26px 0 0;
}

.page-faq .faq-status {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-faq .faq-status-sep {
  color: var(--stone);
}

.page-faq .faq-hero h1 {
  margin: 0;
  max-width: 22ch;
  font-size: clamp(29px, 7.2vw, 56px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--cream);
}

.page-faq .faq-hero-lead {
  margin: 22px 0 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .faq-hero-lead::before {
  content: "";
  display: block;
  width: 54px;
  height: 3px;
  margin-bottom: 14px;
  background: var(--cyan);
  transform: skewX(-8deg);
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-shell {
  display: grid;
  gap: 30px;
  padding-top: 34px;
}

/* ---------- 分组索引 ---------- */
.page-faq .faq-rail {
  scroll-margin-top: calc(var(--bar-h) + 20px);
}

.page-faq .faq-rail-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--stone);
}

.page-faq .faq-index {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index li {
  flex: none;
}

.page-faq .faq-index a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--faq-line);
  border-radius: 2px;
  background: var(--scene-700);
  color: var(--ink-soft);
  font-size: 13.5px;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}

.page-faq .idx-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--clay);
}

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

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--bar-h) + 22px);
}

.page-faq .faq-group + .faq-group {
  margin-top: 48px;
}

.page-faq .faq-group-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 6px 12px;
  padding-bottom: 10px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-group-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--clay);
}

.page-faq .faq-group-head h2 {
  margin: 0;
  font-size: clamp(20px, 3.6vw, 26px);
  font-weight: 800;
  letter-spacing: .01em;
  color: var(--cream);
}

.page-faq .faq-group-note {
  grid-column: 2;
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-dim);
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa {
  margin-bottom: 8px;
  background: var(--scene-700);
  border: 1px solid var(--faq-line);
  border-inline-start: 3px solid transparent;
  border-radius: 2px;
  transition: border-color var(--dur-base) var(--ease), background-color var(--dur-base) var(--ease);
}

.page-faq .qa:hover {
  border-color: rgba(167, 243, 228, .3);
}

.page-faq .qa[open] {
  border-inline-start-color: var(--cyan);
  background: var(--moss);
}

.page-faq .qa summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--cream);
}

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

.page-faq .qa summary::marker {
  content: "";
}

.page-faq .qa summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .qa-no {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--stone);
  transition: color var(--dur-fast) var(--ease);
}

.page-faq .qa[open] .qa-no {
  color: var(--cyan);
}

.page-faq .qa-q {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .qa-cue {
  flex: none;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--cyan);
  transition: transform var(--dur-base) var(--ease);
}

.page-faq .qa[open] .qa-cue {
  transform: rotate(45deg);
}

.page-faq .qa-a {
  padding: 0 16px 18px 16px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .qa-a p {
  margin: 0;
}

.page-faq .qa-a p + p {
  margin-top: 10px;
}

/* ---------- 步骤编号 ---------- */
.page-faq .steps {
  counter-reset: faqstep;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .steps li {
  counter-increment: faqstep;
  position: relative;
  padding-left: 40px;
  margin-bottom: 10px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-faq .steps li:last-child {
  margin-bottom: 0;
}

.page-faq .steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  inset-inline-start: 0;
  top: 3px;
  padding: 1px 5px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--cyan);
  background: rgba(53, 240, 208, .08);
  border: 1px solid var(--faq-cyan-line);
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 20px 0 18px;
}

.page-faq .faq-figure .media-frame {
  border: 1px solid var(--faq-line);
  background: var(--scene-900);
}

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

.page-faq .faq-figure figcaption {
  margin-top: 9px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--ink-dim);
}

/* ---------- 尾部 ---------- */
.page-faq .faq-tail {
  padding-top: 60px;
}

.page-faq .faq-tail-card {
  padding: 26px 22px 30px;
  background: var(--moss);
  border: 1px solid var(--faq-line);
  border-radius: 2px;
}

.page-faq .faq-tail-card h2 {
  margin: 10px 0 0;
  font-size: clamp(20px, 3.6vw, 26px);
  font-weight: 800;
  color: var(--cream);
}

.page-faq .faq-tail-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-tail-list li + li {
  margin-top: 12px;
}

.page-faq .faq-tail-list a {
  display: inline-block;
  max-width: 46ch;
  padding-bottom: 2px;
  border-bottom: 1px solid var(--faq-cyan-line);
  color: var(--cream);
  font-size: 15px;
  line-height: 1.6;
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

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

.page-faq .faq-tail-back {
  margin: 24px 0 0;
}

.page-faq .faq-tail-back a {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px dashed rgba(217, 230, 225, .4);
}

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

/* ---------- 宽屏：左窄栏索引 + 右折叠正文 ---------- */
@media (min-width: 1024px) {
  .page-faq {
    padding-bottom: 120px;
  }

  .page-faq .faq-hero {
    padding-top: 40px;
  }

  .page-faq .faq-shell {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 54px;
    padding-top: 46px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--bar-h) + 28px);
    align-self: start;
  }

  .page-faq .faq-index {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index li + li {
    margin-top: 2px;
  }

  .page-faq .faq-index a {
    display: flex;
    align-items: baseline;
    padding: 9px 10px;
    border: 0;
    border-inline-start: 2px solid transparent;
    border-radius: 0;
    background: transparent;
    font-size: 14px;
    white-space: normal;
    line-height: 1.5;
  }

  .page-faq .faq-index a:hover,
  .page-faq .faq-index a:focus-visible {
    background: var(--faq-soft);
    border-inline-start-color: var(--cyan);
    color: var(--cream);
  }

  .page-faq .qa summary {
    padding: 17px 20px;
    font-size: 16px;
  }

  .page-faq .qa-a {
    padding: 0 20px 20px 56px;
  }

  .page-faq .faq-tail-card {
    padding: 36px 40px 40px;
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-shell {
    grid-template-columns: 252px minmax(0, 1fr);
  }
}