.page-faq {
  --faq-index-w: 264px;
  --faq-gap: clamp(20px, 3vw, 44px);
  background-color: var(--night);
  color: var(--white);
  padding-bottom: clamp(48px, 6vw, 96px);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  border-bottom: 1px solid var(--line);
  padding: clamp(24px, 4vw, 52px) 0 clamp(28px, 4vw, 56px);
  background-image:
    repeating-linear-gradient(90deg, transparent 0 79px, rgba(29, 59, 51, .48) 79px 80px),
    radial-gradient(120% 100% at 88% 0%, rgba(201, 255, 63, .11), transparent 62%),
    linear-gradient(180deg, var(--night), var(--pitch));
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
  align-items: center;
  min-width: 0;
}

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

.page-faq .eyebrow {
  display: inline-block;
  font-family: var(--font-data);
  font-size: .75rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--volt);
  border-left: 3px solid var(--volt);
  padding-left: 10px;
  margin: 0;
}

.page-faq h1 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.85rem, 5.2vw, 3.4rem);
  line-height: 1.06;
  letter-spacing: -.012em;
  color: var(--white);
  margin: .5em 0 .45em;
}

.page-faq .faq-lede {
  margin: 0;
  color: var(--mist);
  font-size: clamp(1rem, 1.05vw, 1.0625rem);
  line-height: 1.8;
  max-width: 62ch;
}

.page-faq .hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  list-style: none;
  margin: 24px 0 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--line);
}

.page-faq .hero-facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  color: var(--mist);
  font-size: .875rem;
  line-height: 1.4;
}

.page-faq .hero-facts .data {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 1.6rem;
  line-height: 1;
  color: var(--volt);
  letter-spacing: -.02em;
}

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

/* ---------- 横向分类条 ---------- */
.page-faq .faq-jump {
  border-bottom: 1px solid var(--line);
  background: rgba(3, 17, 11, .78);
}

.page-faq .jump-list {
  display: flex;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 14px 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .jump-list::-webkit-scrollbar {
  height: 3px;
}

.page-faq .jump-list::-webkit-scrollbar-thumb {
  background: var(--line);
}

.page-faq .jump-list li {
  flex: 0 0 auto;
}

.page-faq .jump-list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 9px 14px;
  background: var(--pitch);
  border: 1px solid var(--line);
  border-left: 3px solid var(--line);
  color: var(--white);
  font-size: .8125rem;
  line-height: 1.2;
  text-decoration: none;
  transition: border-color .18s var(--ease), color .18s var(--ease), background-color .18s var(--ease);
}

.page-faq .jump-list a:hover,
.page-faq .jump-list a:focus-visible {
  border-color: var(--volt);
  color: var(--volt);
  background: #0d2c22;
}

.page-faq .jump-list .data {
  font-family: var(--font-data);
  font-size: .75rem;
  color: var(--volt);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: var(--faq-gap);
  padding-top: clamp(28px, 4vw, 52px);
  min-width: 0;
}

.page-faq .faq-index {
  border: 1px solid var(--line);
  background: rgba(6, 24, 38, .86);
  padding: 18px 18px 20px;
  min-width: 0;
}

.page-faq .index-title {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-size: .8125rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--volt);
}

.page-faq .index-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .index-list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 11px 0;
  border-bottom: 1px dashed var(--line);
  color: var(--mist);
  font-size: .9375rem;
  line-height: 1.4;
  text-decoration: none;
  transition: color .16s var(--ease);
}

.page-faq .index-list li:last-child a {
  border-bottom: 0;
}

.page-faq .index-list a:hover,
.page-faq .index-list a:focus-visible {
  color: var(--volt);
}

.page-faq .index-list .data {
  font-family: var(--font-data);
  font-size: .75rem;
  color: var(--volt);
  flex: 0 0 auto;
}

.page-faq .index-label {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .index-count {
  flex: 0 0 auto;
  font-family: var(--font-data);
  font-size: .75rem;
  color: var(--line);
}

.page-faq .index-note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  color: var(--mist);
  font-size: .8125rem;
  line-height: 1.7;
}

.page-faq .index-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(111, 231, 210, .4);
}

.page-faq .index-note a:hover {
  color: var(--volt);
  border-bottom-color: var(--volt);
}

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

/* ---------- 分类区块 ---------- */
.page-faq .faq-cat {
  scroll-margin-top: 96px;
  margin-bottom: clamp(32px, 4.5vw, 64px);
}

.page-faq .faq-cat:last-of-type {
  margin-bottom: 0;
}

.page-faq .cat-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 6px 14px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--line);
}

.page-faq .cat-num {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--volt);
}

.page-faq .cat-head h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(1.2rem, 2.2vw, 1.75rem);
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--white);
}

.page-faq .cat-sub {
  margin-left: auto;
  font-family: var(--font-data);
  font-size: .75rem;
  color: var(--mist);
  letter-spacing: .05em;
}

.page-faq .faq-map {
  margin: 20px 0 4px;
}

.page-faq .faq-map .img-label {
  font-family: var(--font-data);
  font-size: .75rem;
  color: var(--mist);
}

/* ---------- 手风琴 ---------- */
.page-faq .qa-list {
  margin-top: 4px;
}

.page-faq .qa {
  border-bottom: 1px solid var(--line);
  background: transparent;
  transition: background-color .18s var(--ease);
}

.page-faq .qa[open] {
  background: rgba(10, 42, 32, .62);
}

.page-faq .qa summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 4px 16px 2px;
  cursor: pointer;
  list-style: none;
  color: var(--white);
  transition: color .16s var(--ease);
}

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

.page-faq .qa summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-data);
  font-size: 1.15rem;
  line-height: 1.35;
  color: var(--volt);
  transition: color .16s var(--ease);
}

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

.page-faq .qa summary:hover .qa-q,
.page-faq .qa summary:focus-visible .qa-q {
  color: var(--volt);
}

.page-faq .qa-num {
  flex: 0 0 auto;
  font-family: var(--font-data);
  font-size: .75rem;
  line-height: 1.9;
  color: var(--cyan);
  letter-spacing: .02em;
}

.page-faq .qa-q {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 1rem;
  line-height: 1.6;
  font-weight: 500;
  transition: color .16s var(--ease);
}

.page-faq .qa-a {
  padding: 0 4px 20px 34px;
  color: var(--mist);
  font-size: .9375rem;
  line-height: 1.85;
  border-left: 1px solid transparent;
}

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

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

.page-faq .qa-a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(111, 231, 210, .4);
}

.page-faq .qa-a a:hover {
  color: var(--volt);
  border-bottom-color: var(--volt);
}

/* 首题放大 */
.page-faq .qa--lead {
  border-top: 2px solid var(--line);
}

.page-faq .qa--lead summary {
  padding: 22px 4px 20px 2px;
  align-items: center;
}

.page-faq .qa--lead .qa-q {
  font-family: var(--font-head);
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: .004em;
}

.page-faq .qa--lead .qa-num {
  font-size: .8125rem;
  color: var(--volt);
  background: rgba(201, 255, 63, .1);
  border: 1px solid rgba(201, 255, 63, .35);
  padding: 1px 6px;
  line-height: 1.5;
}

.page-faq .qa--lead .qa-a {
  padding-left: 0;
  font-size: 1rem;
  padding-bottom: 24px;
}

/* 锚点定位到的分类给一点提示 */
.page-faq .faq-cat:target .cat-head {
  border-bottom-color: var(--volt);
}

.page-faq .faq-cat:target .cat-head h2 {
  color: var(--volt);
}

.page-faq .faq-back {
  margin: clamp(32px, 4vw, 52px) 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: var(--mist);
  font-size: .9375rem;
  line-height: 1.8;
}

.page-faq .faq-back a {
  color: var(--volt);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 255, 63, .45);
}

.page-faq .faq-back a:hover {
  color: var(--white);
  border-bottom-color: var(--white);
}

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-a {
    padding-left: 0;
  }

  .page-faq .hero-facts {
    gap: 12px 40px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, .85fr);
    align-items: end;
  }

  .page-faq .faq-hero-fig {
    align-self: end;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 92px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
  }

  .page-faq .qa summary {
    padding: 18px 6px 18px 2px;
  }

  .page-faq .qa--lead summary {
    padding: 26px 6px 22px 2px;
  }
}

@media (min-width: 1280px) {
  .page-faq {
    --faq-index-w: 292px;
  }
}

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