.page-faq {
  --faq-rail: 228px;
  --faq-panel: linear-gradient(178deg, rgba(18, 26, 58, .88), rgba(11, 16, 38, .92));
  --faq-panel-open: linear-gradient(178deg, rgba(27, 38, 80, .92), rgba(11, 16, 38, .96));
  padding-bottom: clamp(48px, 8vw, 96px);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  margin: clamp(18px, 3vw, 30px) 0 clamp(22px, 3.4vw, 36px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: clamp(30px, 4.4vw, 52px);
  align-items: center;
  padding-bottom: clamp(36px, 5.6vw, 60px);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-hero h1 {
  margin: 10px 0 0;
  font-family: var(--font-heading);
  font-size: clamp(1.72rem, 4.4vw, 2.85rem);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: .005em;
  color: var(--paper);
  max-width: 20ch;
}

.page-faq .faq-hero .lede {
  margin: 16px 0 0;
  max-width: 54ch;
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 14px clamp(22px, 4vw, 40px);
  margin-top: clamp(22px, 3vw, 30px);
}

.page-faq .faq-stat {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding-left: 12px;
  border-left: 1px solid var(--line);
}

.page-faq .faq-stat__value {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--cyan);
  letter-spacing: .04em;
}

.page-faq .faq-stat__label {
  font-size: .8125rem;
  color: var(--muted);
  letter-spacing: .02em;
}

.page-faq .faq-hero__visual {
  position: relative;
  margin: 10px 0 0;
  padding: 12px 12px 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: linear-gradient(160deg, var(--ink-800), var(--ink-950));
  box-shadow: var(--shadow-card);
}

.page-faq .faq-hero__visual::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 26px;
  width: 76px;
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
}

.page-faq .faq-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  border-radius: calc(var(--radius-card) - 8px);
  background: var(--ink-900);
}

.page-faq .faq-hero__visual .media__caption {
  padding: 12px 4px 14px;
  font-size: .8125rem;
  line-height: 1.65;
  color: var(--muted);
}

@media (min-width: 940px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  }
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(28px, 4vw, 44px);
  padding-top: clamp(38px, 6vw, 64px);
}

.page-faq .faq-rail .data-label {
  margin: 0 0 12px;
}

.page-faq .faq-rail__nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 10px;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-rail__nav::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-rail__link {
  flex: 0 0 auto;
  padding: 8px 15px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: rgba(18, 26, 58, .62);
  color: var(--muted);
  font-size: .8125rem;
  letter-spacing: .02em;
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s ease, border-color .2s ease, background .2s ease;
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan-40);
  background: var(--cyan-12);
}

@media (min-width: 1080px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: clamp(34px, 4vw, 60px);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 106px;
  }

  .page-faq .faq-rail__nav {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__link {
    border-radius: 12px;
  }
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 116px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(42px, 6vw, 70px);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 16px;
  align-items: start;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 18px;
}

.page-faq .faq-group__no {
  font-size: 1.15rem;
  line-height: 1.45;
  color: var(--cyan);
  letter-spacing: .06em;
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: clamp(1.18rem, 2.5vw, 1.6rem);
  font-weight: 600;
  line-height: 1.38;
  color: var(--paper);
}

.page-faq .faq-group__lead {
  margin: 10px 0 0;
  font-size: .9375rem;
  line-height: 1.72;
  color: var(--muted);
  max-width: 64ch;
}

/* ---------- 手风琴 ---------- */
.page-faq .qa {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--faq-panel);
  overflow: hidden;
  transition: border-color .25s ease, background .25s ease;
}

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

.page-faq .qa[open] {
  border-color: var(--cyan-40);
  background: var(--faq-panel-open);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper);
  transition: color .2s ease;
}

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

.page-faq .qa__q::marker {
  content: "";
}

.page-faq .qa__q:hover,
.page-faq .qa__q:focus-visible {
  color: var(--cyan);
}

.page-faq .qa__q-text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .qa__q::after {
  content: "";
  flex: 0 0 16px;
  width: 16px;
  height: 16px;
  margin-top: 5px;
  margin-left: auto;
  background-image:
    linear-gradient(var(--cyan), var(--cyan)),
    linear-gradient(var(--cyan), var(--cyan));
  background-repeat: no-repeat;
  background-position: center, center;
  background-size: 16px 2px, 2px 16px;
  transition: background-size .25s ease;
}

.page-faq .qa[open] .qa__q::after {
  background-size: 16px 2px, 2px 0;
}

.page-faq .qa__a {
  margin: 0 18px;
  padding: 14px 0 20px;
  border-top: 1px dashed var(--line-soft);
  font-size: .9375rem;
  line-height: 1.78;
  color: var(--muted);
}

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

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

.page-faq .qa__a strong {
  color: var(--paper);
  font-weight: 600;
}

.page-faq .qa__a .mono {
  color: var(--cyan);
}

/* ---------- 步骤编号 ---------- */
.page-faq .steps {
  list-style: none;
  counter-reset: faqstep;
  margin: 4px 0 0;
  padding: 0;
  display: grid;
  gap: 13px;
}

.page-faq .steps > li {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.page-faq .steps > li::before {
  counter-increment: faqstep;
  content: counter(faqstep, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: .6875rem;
  line-height: 24px;
  text-align: center;
  color: var(--cyan);
  border: 1px solid var(--cyan-40);
  border-radius: 8px;
  background: var(--cyan-12);
}

/* ---------- 要点与对比 ---------- */
.page-faq .mini-list {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-faq .mini-list > li {
  padding: 10px 14px;
  border-left: 2px solid var(--cyan-40);
  border-radius: 0 10px 10px 0;
  background: rgba(18, 26, 58, .5);
  font-size: .875rem;
  line-height: 1.68;
  color: var(--muted);
}

.page-faq .mini-list strong {
  color: var(--paper);
  font-weight: 600;
}

/* ---------- 批次复制行 ---------- */
.page-faq .batch-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 16px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(11, 16, 38, .6);
}

.page-faq .batch-row .copy-btn {
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--muted);
  font-family: var(--font-body);
  font-size: .75rem;
  letter-spacing: .02em;
  padding: 6px 15px;
  cursor: pointer;
  transition: color .2s ease, border-color .2s ease;
}

.page-faq .batch-row .copy-btn:hover,
.page-faq .batch-row .copy-btn:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan-40);
}

.page-faq .batch-row .copy-btn[data-copied] {
  color: var(--orange);
  border-color: var(--orange-20);
}

/* ---------- 章节配图 ---------- */
.page-faq .faq-figure {
  margin: 22px 0 0;
  padding: 10px 10px 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: var(--ink-900);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  border-radius: calc(var(--radius-card) - 8px);
  background: var(--ink-800);
}

.page-faq .faq-figure .media__caption {
  padding: 11px 4px 13px;
  font-size: .8125rem;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 自查路径 ---------- */
.page-faq .faq-tree {
  margin-top: clamp(48px, 7vw, 88px);
  padding: clamp(26px, 4vw, 46px);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background:
    radial-gradient(circle at 84% 8%, var(--cyan-12), transparent 46%),
    linear-gradient(168deg, rgba(18, 26, 58, .94), rgba(7, 11, 26, .97));
}

.page-faq .faq-tree__head h2 {
  margin: 10px 0 0;
  font-family: var(--font-heading);
  font-size: clamp(1.25rem, 2.8vw, 1.75rem);
  font-weight: 600;
  line-height: 1.36;
  color: var(--paper);
}

.page-faq .faq-tree__intro {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-tree__path {
  list-style: none;
  margin: clamp(26px, 3.4vw, 38px) 0 0;
  padding: 0;
}

.page-faq .faq-tree__node {
  position: relative;
  padding: 0 0 clamp(22px, 2.8vw, 30px) 36px;
}

.page-faq .faq-tree__node:last-child {
  padding-bottom: 0;
}

.page-faq .faq-tree__node::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 20px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan-40), var(--line) 62%, transparent);
}

.page-faq .faq-tree__node:last-child::before {
  display: none;
}

.page-faq .faq-tree__dot {
  position: absolute;
  left: 0;
  top: 4px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 1px solid var(--cyan-40);
  background: var(--ink-900);
  box-shadow: inset 0 0 0 3px rgba(95, 242, 233, .18);
}

.page-faq .faq-tree__node h3 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--paper);
}

.page-faq .faq-tree__node p {
  margin: 7px 0 0;
  max-width: 60ch;
  font-size: .875rem;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 底部行动区 ---------- */
.page-faq .faq-cta {
  margin-top: clamp(44px, 6vw, 76px);
}

.page-faq .faq-cta__card {
  position: relative;
  padding: clamp(26px, 4vw, 46px);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: linear-gradient(150deg, rgba(27, 38, 80, .9), rgba(11, 16, 38, .96));
  overflow: hidden;
}

.page-faq .faq-cta__card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 140px;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--orange));
}

.page-faq .faq-cta__card h2 {
  margin: 10px 0 0;
  font-family: var(--font-heading);
  font-size: clamp(1.2rem, 2.6vw, 1.65rem);
  font-weight: 600;
  line-height: 1.38;
  color: var(--paper);
}

.page-faq .faq-cta__card p {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: .9375rem;
  line-height: 1.76;
  color: var(--muted);
}

.page-faq .faq-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 28px);
}

/* ---------- 窄屏微调 ---------- */
@media (max-width: 639px) {
  .page-faq .faq-hero h1 {
    max-width: none;
  }

  .page-faq .faq-hero__visual {
    padding: 9px 9px 0;
  }

  .page-faq .qa__q {
    padding: 15px 15px;
    font-size: .9375rem;
  }

  .page-faq .qa__a {
    margin: 0 15px;
  }

  .page-faq .faq-group__head {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .page-faq .faq-tree {
    padding: 22px 18px;
  }

  .page-faq .faq-cta__links .btn {
    flex: 1 1 auto;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__q::after,
  .page-faq .faq-rail__link,
  .page-faq .batch-row .copy-btn {
    transition: none;
  }
}