.page-faq {
  --faq-rail-w: 232px;
  --faq-ink-link: #5A2FD9;
  background: var(--ink);
  color: var(--paper);
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 34px 0 30px;
  border-bottom: 1px solid var(--line-soft);
  background:
    linear-gradient(180deg, rgba(16, 42, 92, .78) 0%, rgba(10, 13, 27, 0) 72%),
    var(--ink);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 48%;
  height: 72%;
  background: linear-gradient(135deg, rgba(123, 77, 255, .32), rgba(58, 30, 122, .04));
  clip-path: polygon(20% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 26px;
}

.page-faq .breadcrumbs {
  font-size: 12.5px;
  color: var(--mist);
}

.page-faq .breadcrumbs a {
  color: var(--mist);
  text-decoration: none;
}

.page-faq .breadcrumbs a:hover {
  color: var(--lime);
}

.page-faq .breadcrumbs span[aria-hidden] {
  margin: 0 8px;
  color: var(--line);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(28px, 5.4vw, 50px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-faq .faq-hero .lead {
  margin: 16px 0 0;
  max-width: 62ch;
  color: var(--mist);
  font-size: 16px;
  line-height: 1.85;
}

.page-faq .faq-hero__aside {
  display: grid;
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: var(--line-soft);
}

.page-faq .hero-stat {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 13px 16px;
  background: rgba(10, 13, 27, .74);
}

.page-faq .hero-stat__num {
  flex: 0 0 auto;
  color: var(--lime);
  font-size: 21px;
  font-weight: 600;
}

.page-faq .hero-stat__label {
  color: var(--mist);
  font-size: 13px;
  line-height: 1.6;
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-shell {
  display: grid;
  gap: 26px;
  padding-top: 34px;
  padding-bottom: 56px;
}

/* ---------- 左栏分类 ---------- */
.page-faq .faq-rail {
  position: sticky;
  top: calc(var(--header-h) + 12px);
  z-index: 2;
  padding: 10px 0 6px;
  background: var(--ink);
}

.page-faq .faq-rail__title {
  margin: 0 0 10px;
  color: var(--mist);
  font-size: 12px;
  letter-spacing: .16em;
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-rail__list a {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 12px;
  border: 1px solid transparent;
  border-left: 2px solid var(--line-soft);
  border-radius: var(--r-sm);
  color: var(--mist);
  font-size: 13.5px;
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .faq-rail__list a:hover,
.page-faq .faq-rail__list a:focus-visible {
  border-left-color: var(--lime);
  background: rgba(123, 77, 255, .16);
  color: var(--paper);
}

.page-faq .faq-rail__list .data-num {
  color: var(--lime);
  font-size: 12px;
}

.page-faq .faq-rail__note {
  margin: 12px 0 0;
  color: var(--mist);
  font-size: 12.5px;
  line-height: 1.7;
}

.page-faq .faq-rail__note a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 问答组 ---------- */
.page-faq .qa-group {
  margin-bottom: 44px;
  scroll-margin-top: calc(var(--header-h) + 22px);
}

.page-faq .qa-group:last-child {
  margin-bottom: 8px;
}

.page-faq .qa-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 14px;
  align-items: baseline;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-faq .qa-group__num {
  color: var(--lime);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: .04em;
}

.page-faq .qa-group__title {
  margin: 0;
  color: var(--paper);
  font-size: clamp(20px, 3.1vw, 26px);
  font-weight: 900;
  letter-spacing: -.01em;
}

.page-faq .qa-group__hint {
  grid-column: 2;
  margin: 0;
  color: var(--mist);
  font-size: 13.5px;
  line-height: 1.7;
}

.page-faq .qa-item {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .qa-item__h {
  margin: 0;
}

.page-faq .qa-q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  width: 100%;
  padding: 16px 4px 16px 0;
  border: 0;
  background: none;
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.6;
  text-align: left;
  cursor: pointer;
  transition: color .2s var(--ease);
}

.page-faq .qa-q:hover {
  color: var(--lime);
}

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

.page-faq .qa-q__mark {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin-top: 9px;
  border-right: 2px solid var(--mist);
  border-bottom: 2px solid var(--mist);
  transform: rotate(45deg);
  transition: transform .24s var(--ease), border-color .24s var(--ease);
}

.page-faq .qa-q[aria-expanded="true"] {
  color: var(--lime);
}

.page-faq .qa-q[aria-expanded="true"] .qa-q__mark {
  border-color: var(--violet);
  transform: rotate(-135deg);
}

.page-faq .qa-a {
  padding: 0 0 18px 23px;
}

.page-faq .qa-a__inner {
  padding: 14px 18px;
  border-left: 3px solid var(--violet);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: var(--paper);
  color: var(--print);
  font-size: 15px;
  line-height: 1.85;
}

.page-faq .qa-a__inner p {
  margin: 0 0 8px;
}

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

.page-faq .qa-a__inner a {
  color: var(--faq-ink-link);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq [data-collapse-panel][hidden] {
  display: none;
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 20px 0 6px;
}

.page-faq .faq-figure .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  object-fit: cover;
}

.page-faq .media-frame__caption {
  margin-top: 8px;
  color: var(--mist);
  font-size: 12.5px;
  line-height: 1.6;
}

/* ---------- 进失球分布示意图 ---------- */
.page-faq .flow-figure {
  margin: 22px 0 0;
  padding: 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background:
    repeating-linear-gradient(180deg, rgba(155, 168, 198, .06) 0 1px, transparent 1px 14px),
    rgba(16, 42, 92, .3);
}

.page-faq .flow-chart {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .flow-axis {
  stroke: rgba(123, 77, 255, .5);
  stroke-width: 1;
  stroke-dasharray: 4 4;
}

.page-faq .bar-goal {
  fill: var(--goal);
}

.page-faq .bar-miss {
  fill: var(--miss);
}

.page-faq .flow-figure figcaption {
  margin-top: 10px;
  color: var(--mist);
  font-size: 12.5px;
  line-height: 1.6;
}

/* ---------- 检索示例 ---------- */
.page-faq .search-demo {
  margin-top: 20px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(58, 30, 122, .22);
}

.page-faq .search-demo__label {
  margin: 0 0 12px;
  color: var(--lime);
  font-size: 12px;
  letter-spacing: .14em;
}

.page-faq .search-demo__list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .search-demo__list li {
  display: grid;
  gap: 4px;
}

.page-faq .search-demo__code {
  display: inline-block;
  width: fit-content;
  max-width: 100%;
  padding: 5px 10px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-sm);
  background: rgba(10, 13, 27, .6);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 13px;
  word-break: break-word;
}

.page-faq .search-demo__desc {
  color: var(--mist);
  font-size: 13px;
  line-height: 1.65;
}

/* ---------- 结尾行动区 ---------- */
.page-faq .faq-cta {
  padding: 34px 0 46px;
  border-top: 1px solid var(--line);
  background: linear-gradient(120deg, rgba(16, 42, 92, .92), rgba(10, 13, 27, .96));
}

.page-faq .faq-cta__inner {
  display: grid;
  gap: 18px;
}

.page-faq .faq-cta h2 {
  margin: 0 0 8px;
  color: var(--paper);
  font-size: clamp(20px, 3.2vw, 28px);
  font-weight: 900;
  letter-spacing: -.01em;
}

.page-faq .faq-cta p {
  margin: 0;
  max-width: 52ch;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.75;
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero {
    padding: 46px 0 38px;
  }

  .page-faq .hero-stat {
    padding: 15px 18px;
  }

  .page-faq .qa-q {
    font-size: 17px;
  }

  .page-faq .qa-a__inner {
    padding: 16px 20px;
    font-size: 15.5px;
  }

  .page-faq .search-demo__list li {
    grid-template-columns: minmax(0, auto) minmax(0, 1fr);
    align-items: center;
    gap: 14px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, .9fr);
    align-items: end;
    gap: 44px;
  }

  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 48px;
    padding-top: 44px;
  }

  .page-faq .faq-rail {
    padding-top: 4px;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__list a {
    padding: 10px 12px;
  }

  .page-faq .faq-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-hero {
    padding: 58px 0 46px;
  }

  .page-faq .qa-a {
    padding-left: 27px;
  }
}

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