.page-faq {
  --faq-rail-w: 236px;
}

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

/* ---------- 首屏 ---------- */
.page-faq .faq-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--grid);
}

.page-faq .faq-intro__main {
  min-width: 0;
}

.page-faq .faq-intro .kicker {
  margin: 0 0 12px;
}

.page-faq .faq-intro h1 {
  margin: 0 0 16px;
  font-size: clamp(30px, 6.4vw, 56px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-intro .lead {
  margin: 0;
  max-width: 62ch;
}

.page-faq .faq-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-faq .faq-facts__item {
  background: var(--ink-deep);
  padding: 14px 14px 16px;
}

.page-faq .faq-facts dt {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-faq .faq-facts dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(20px, 3.2vw, 26px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--neon);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 0;
}

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

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--grid);
}

.page-faq .faq-hero img {
  aspect-ratio: 2 / 1;
}

.page-faq .faq-sec .faq-figure {
  margin: 20px 0 24px;
}

.page-faq .faq-sec .faq-figure img {
  aspect-ratio: 10 / 7;
}

.page-faq .faq-figure__cap {
  margin-top: 10px;
  padding-left: 10px;
  border-left: 2px solid var(--grid);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  padding-top: 40px;
}

.page-faq .faq-body {
  min-width: 0;
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-rail {
  border: 1px solid var(--grid);
  background: var(--ink-deep);
  padding: 16px 14px 18px;
}

.page-faq .faq-rail__cap {
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--grid);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
}

.page-faq .faq-rail__link {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
  padding: 9px 8px 9px 10px;
  border-left: 2px solid transparent;
  color: var(--paper-dim);
  text-decoration: none;
  font-size: 14.5px;
  line-height: 1.45;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--neon);
  border-left-color: var(--neon);
  background: rgba(0, 229, 195, 0.06);
  outline: none;
}

.page-faq .faq-rail__idx {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--muted);
}

.page-faq .faq-rail__link:hover .faq-rail__idx,
.page-faq .faq-rail__link:focus-visible .faq-rail__idx {
  color: var(--glow);
}

.page-faq .faq-rail__note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--grid);
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 章节 ---------- */
.page-faq .faq-sec {
  scroll-margin-top: 118px;
  padding: 0 0 30px;
  margin-bottom: 30px;
  border-bottom: 1px solid var(--grid);
}

.page-faq .faq-sec:last-of-type {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-sec__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 10px;
}

.page-faq .faq-sec__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--neon);
}

.page-faq .faq-sec__title {
  margin: 0;
  font-size: clamp(19px, 2.6vw, 26px);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-faq .faq-sec__lead {
  margin: 0 0 16px;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

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

.page-faq .qa:last-of-type {
  border-bottom: 1px solid var(--grid);
}

.page-faq .qa__q {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 14px 4px;
  list-style: none;
  cursor: pointer;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
  transition: color 0.18s var(--ease);
}

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

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

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: -2px;
}

.page-faq .qa__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  color: var(--muted);
}

.page-faq .qa__q::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--neon);
}

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

.page-faq .qa__a {
  max-width: 70ch;
  padding: 0 4px 18px 32px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper-dim);
}

.page-faq .qa__a > *:first-child {
  margin-top: 0;
}

.page-faq .qa__a > *:last-child {
  margin-bottom: 0;
}

.page-faq .qa__a p {
  margin: 0 0 10px;
}

.page-faq .qa__a a,
.page-faq .faq-steps a {
  color: var(--neon);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-faq .qa__a a:hover,
.page-faq .faq-steps a:hover {
  color: var(--glow);
}

/* ---------- 对照表 ---------- */
.page-faq .faq-table-wrap {
  margin: 18px 0 22px;
}

.page-faq .faq-compare {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
}

.page-faq .faq-compare th,
.page-faq .faq-compare td {
  border: 1px solid var(--grid);
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  font-size: 14px;
  line-height: 1.7;
}

.page-faq .faq-compare thead th {
  background: var(--ink-deep);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--muted);
  white-space: nowrap;
}

.page-faq .faq-compare tbody th {
  background: var(--panel);
  font-size: 14.5px;
  font-weight: 700;
  color: var(--paper);
  white-space: nowrap;
}

.page-faq .faq-compare tbody td {
  color: var(--paper-dim);
}

.page-faq .faq-key {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 8px;
  vertical-align: middle;
  background: currentColor;
}

.page-faq .faq-key--brick {
  color: var(--brick);
}

.page-faq .faq-key--neon {
  color: var(--neon);
}

.page-faq .faq-key--amber {
  color: var(--amber);
}

/* ---------- 步骤 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
  counter-reset: faqstep;
}

.page-faq .faq-steps li {
  position: relative;
  background: var(--ink-deep);
  padding: 14px 16px 14px 52px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--paper-dim);
}

.page-faq .faq-steps li::before {
  counter-increment: faqstep;
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 16px;
  top: 15px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.4;
  color: var(--neon);
}

/* ---------- 勘误提示与联系 ---------- */
.page-faq .faq-strip {
  display: inline-block;
  max-width: min(100%, 54ch);
  margin: 0 0 20px;
  font-size: 14px;
  line-height: 1.65;
}

.page-faq .faq-contacts {
  margin: 10px 0 14px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 520px) {
  .page-faq .qa__q {
    font-size: 15px;
    gap: 8px;
  }

  .page-faq .qa__a {
    padding-left: 22px;
    font-size: 14.5px;
  }

  .page-faq .faq-steps li {
    padding-left: 44px;
    padding-right: 14px;
  }

  .page-faq .faq-steps li::before {
    left: 14px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-intro {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: end;
    gap: 44px;
  }

  .page-faq .faq-intro h1 {
    letter-spacing: -0.015em;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
    padding-top: 48px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 116px;
  }
}

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