.page-faq {
  --faq-accent: var(--observe);
  --faq-gap: 20px;
  background-color: var(--night);
  color: var(--star);
  overflow-x: hidden;
}

.page-faq .faq-wrap {
  width: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  position: relative;
  border-bottom: 1px solid var(--line);
  background-color: var(--night);
  background-image:
    linear-gradient(180deg, rgba(16, 36, 69, 0.96) 0%, rgba(8, 21, 43, 0.7) 70%),
    repeating-linear-gradient(90deg, rgba(61, 88, 120, 0.16) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(0deg, rgba(61, 88, 120, 0.16) 0 1px, transparent 1px 64px);
}

.page-faq .faq-hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding-top: 32px;
  padding-bottom: 40px;
}

.page-faq .faq-hero-copy {
  min-width: 0;
}

.page-faq .faq-title {
  margin: 12px 0 16px;
  font-size: clamp(30px, 7vw, 58px);
  line-height: 1.06;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--star);
  max-width: 18ch;
}

.page-faq .lede {
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--thin);
  margin: 0;
}

.page-faq .faq-search {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 26px;
  max-width: 440px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 8px;
  transition: border-color 0.2s ease;
}

.page-faq .faq-search:focus-within {
  border-bottom-color: var(--observe);
}

.page-faq .faq-search-icon {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--thin);
  line-height: 1;
}

.page-faq .faq-search .search-input {
  flex: 1 1 auto;
  min-width: 0;
  background: transparent;
  border: 0;
  color: var(--star);
  font-family: var(--font-sans);
  font-size: 15px;
  padding: 6px 0;
}

.page-faq .faq-search .search-input::placeholder {
  color: var(--line);
}

.page-faq .faq-search .search-input:focus {
  outline: none;
}

.page-faq .faq-hero-visual {
  margin: 0;
  border: 1px solid var(--line);
  background-color: var(--strata);
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.page-faq .faq-hero-visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ============ 双栏主体 ============ */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  padding-top: 36px;
  padding-bottom: 72px;
}

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

/* ============ 目录树 ============ */
.page-faq .faq-toc {
  order: -1;
  min-width: 0;
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.page-faq .faq-toc-title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--thin);
}

.page-faq .faq-toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: none;
}

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

.page-faq .faq-toc-item {
  flex: 0 0 auto;
}

.page-faq .faq-toc-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  color: var(--thin);
  font-size: 13px;
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.page-faq .faq-toc-link:hover,
.page-faq .faq-toc-link:focus-visible {
  color: var(--star);
  border-color: var(--observe);
  background-color: var(--strata);
}

.page-faq .faq-toc-num {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--observe);
}

/* ============ 主题分组 ============ */
.page-faq .faq-group {
  --faq-accent: var(--observe);
  border-top: 1px solid var(--line);
  padding-top: 26px;
  margin-top: 34px;
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-faq .faq-list > .faq-group:first-child {
  border-top: 0;
  padding-top: 0;
  margin-top: 0;
}

.page-faq .faq-group--injury,
.page-faq .faq-group--corrections {
  --faq-accent: var(--red);
}

.page-faq .faq-group--transfer,
.page-faq .faq-group--alerts {
  --faq-accent: var(--yellow);
}

.page-faq .faq-group--favorites {
  --faq-accent: var(--green);
}

.page-faq .faq-group-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 18px;
  border-left: 3px solid var(--faq-accent);
  padding-left: 12px;
}

.page-faq .faq-group-num {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--faq-accent);
}

.page-faq .faq-group .section-title {
  margin: 0;
  font-size: clamp(20px, 3.2vw, 30px);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--star);
}

/* ============ 问答条目 ============ */
.page-faq .faq-item {
  border: 1px solid var(--line);
  border-left: 2px solid var(--faq-accent);
  background-color: var(--night);
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

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

.page-faq .faq-item:not([open]):hover {
  background-color: var(--strata);
  border-color: var(--observe);
  border-left-color: var(--faq-accent);
}

.page-faq .faq-item[open] {
  background-color: var(--strata);
  border-color: var(--line);
  border-left-color: var(--faq-accent);
}

.page-faq .faq-item > summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 10px 14px;
  align-items: start;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}

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

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

.page-faq .faq-item > summary::after {
  content: "+";
  justify-self: end;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--thin);
  padding-top: 3px;
  transition: color 0.2s ease;
}

.page-faq .faq-item[open] > summary::after {
  content: "−";
  color: var(--observe);
}

.page-faq .faq-q {
  padding-top: 3px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--faq-accent);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-q-text {
  font-size: 15.5px;
  line-height: 1.5;
  font-weight: 600;
  color: var(--star);
}

.page-faq .faq-a {
  border-top: 1px solid var(--line);
  padding: 0 16px 16px;
}

.page-faq .faq-a p {
  margin: 14px 0 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--thin);
}

/* ============ 图 ============ */
.page-faq .faq-figure {
  margin: 22px 0 0;
  border: 1px solid var(--line);
  background-color: var(--strata);
}

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

.page-faq .faq-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--thin);
}

/* ============ 桌面布局 ============ */
@media (min-width: 900px) {
  .page-faq .faq-hero-inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: end;
    gap: 48px;
    padding-top: 48px;
    padding-bottom: 56px;
  }

  .page-faq .faq-hero-visual {
    aspect-ratio: 3 / 1;
    align-self: center;
  }

  .page-faq .faq-body {
    grid-template-columns: minmax(0, 1fr) 256px;
    gap: 56px;
    padding-top: 48px;
  }

  .page-faq .faq-toc {
    order: 0;
    position: sticky;
    top: calc(var(--header-h) + 28px);
    border-top: 1px solid var(--observe);
  }

  .page-faq .faq-toc-list {
    display: block;
    overflow: visible;
    white-space: normal;
  }

  .page-faq .faq-toc-item + .faq-toc-item {
    margin-top: 6px;
  }

  .page-faq .faq-toc-link {
    display: flex;
    width: 100%;
    padding: 8px 10px;
    border-color: transparent;
    border-left: 2px solid var(--line);
  }

  .page-faq .faq-toc-link:hover,
  .page-faq .faq-toc-link:focus-visible {
    border-left-color: var(--observe);
    background-color: var(--strata);
  }

  .page-faq .faq-q-text {
    font-size: 16px;
  }

  .page-faq .faq-item > summary {
    padding: 16px 20px;
  }

  .page-faq .faq-a {
    padding: 0 20px 18px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(0, 1fr) 280px;
  }
}

/* ============ 动效收敛 ============ */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-toc-link,
  .page-faq .faq-search,
  .page-faq .faq-item > summary::after {
    transition: none;
  }
}