.page-faq {
  --faq-rule: 2px solid var(--line);
}

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

.page-faq .breadcrumb {
  padding: 18px 0 0;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 26px 0 26px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  width: min(220px, 42%);
  height: 6px;
  background: var(--orange);
}

.page-faq .faq-hero h1 {
  margin: 10px 0 0;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(28px, 7.4vw, 52px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--paper);
  max-width: 20ch;
}

.page-faq .faq-hero .lead {
  margin: 16px 0 0;
  max-width: 62ch;
  color: var(--paper-dim);
  font-size: 16px;
  line-height: 1.75;
}

.page-faq .faq-index-wrap {
  margin-top: 22px;
}

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

.page-faq .faq-index a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--paper-dim);
  font-size: 13px;
  line-height: 1.2;
  text-decoration: none;
  transition: border-color var(--dur), color var(--dur), transform var(--dur);
}

.page-faq .faq-index a:hover,
.page-faq .faq-index a:focus-visible {
  border-color: var(--orange);
  color: var(--paper);
  transform: translateY(-2px);
}

.page-faq .faq-index a:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

.page-faq .faq-index__n {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--orange);
}

/* ---------- 章节 ---------- */
.page-faq .faq-body {
  padding-bottom: 40px;
}

.page-faq .faq-group {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  padding-top: 26px;
  margin-top: 30px;
  border-top: var(--faq-rule);
  scroll-margin-top: 20px;
}

.page-faq .faq-group:first-child {
  margin-top: 34px;
}

.page-faq .faq-group__head {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-faq .faq-num {
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--orange);
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 22px;
  line-height: 1.3;
  color: var(--paper);
}

.page-faq .faq-group__head h2::after {
  content: "";
  display: block;
  width: 32px;
  height: 3px;
  margin-top: 9px;
  background: var(--clay);
}

.page-faq .faq-group__note {
  margin: 0 0 16px;
  max-width: 62ch;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

/* ---------- 问答条目 ---------- */
.page-faq .qa {
  border: var(--faq-rule);
  border-left: 5px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
  margin-bottom: 10px;
  transition: border-color var(--dur), transform var(--dur), box-shadow var(--dur);
}

.page-faq .qa:hover {
  transform: translateY(-2px);
  border-color: var(--moss);
}

.page-faq .qa[open] {
  border-left-color: var(--orange);
  box-shadow: var(--shadow-hard);
}

.page-faq .qa > summary {
  position: relative;
  display: block;
  padding: 14px 46px 14px 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper);
}

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

.page-faq .qa > summary::after {
  content: "+";
  position: absolute;
  right: 15px;
  top: 13px;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1.3;
  color: var(--muted);
}

.page-faq .qa[open] > summary::after {
  content: "\2013";
  color: var(--orange);
}

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

.page-faq .qa__a {
  padding: 0 16px 16px;
  color: var(--paper-dim);
  font-size: 16px;
  line-height: 1.75;
}

.page-faq .qa__a p {
  margin: 0 0 10px;
  max-width: 62ch;
}

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

.page-faq .qa__a a {
  color: var(--blue-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .qa__a a:hover,
.page-faq .qa__a a:focus-visible {
  color: var(--paper);
  text-decoration-color: var(--orange);
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 18px 0 4px;
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.page-faq .faq-figure--tablet {
  max-width: 380px;
}

/* ---------- 刷新时间刻度 ---------- */
.page-faq .faq-timeline {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-faq .faq-timeline li {
  position: relative;
  padding-left: 22px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-faq .faq-timeline li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 10px;
  height: 10px;
  background: var(--orange);
}

.page-faq .faq-timeline__t {
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1.2;
  color: var(--orange);
}

.page-faq .faq-timeline__d {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
  max-width: 40ch;
}

/* ---------- 中等屏幕 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-timeline {
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
    margin: 6px 0 24px;
  }

  .page-faq .faq-timeline li {
    padding: 14px 0 0;
  }

  .page-faq .faq-timeline li::before {
    display: none;
  }

  .page-faq .faq-timeline li {
    border-top: 3px solid var(--orange);
  }

  .page-faq .faq-figure--tablet {
    max-width: 420px;
  }
}

/* ---------- 宽屏：左栏章节 + 右栏问答 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 36px 0 30px;
  }

  .page-faq .faq-group {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 44px;
    margin-top: 46px;
    padding-top: 32px;
  }

  .page-faq .faq-group:first-child {
    margin-top: 46px;
  }

  .page-faq .faq-group__head {
    flex-direction: row;
    align-items: baseline;
    gap: 14px;
  }

  .page-faq .faq-num {
    font-size: 40px;
  }

  .page-faq .faq-group__head h2 {
    font-size: 24px;
  }

  .page-faq .faq-group__note {
    margin-top: 4px;
  }

  .page-faq .faq-figure--tablet {
    max-width: 340px;
  }
}

.page-faq .faq-group[data-reveal] {
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .faq-index a {
    transition: none;
  }

  .page-faq .qa:hover {
    transform: none;
  }
}