.page-faq {
  --faq-line: rgba(30, 58, 92, 0.95);
  --faq-line-soft: rgba(30, 58, 92, 0.55);
  --faq-panel: rgba(16, 42, 76, 0.6);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  padding-top: clamp(96px, 16vh, 168px);
  padding-bottom: clamp(32px, 6vw, 64px);
}

.page-faq .faq-hero .breadcrumbs {
  margin-bottom: clamp(20px, 4vw, 36px);
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: 32px;
}

.page-faq .faq-hero-main h1 {
  font-size: clamp(30px, 6.4vw, 54px);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.01em;
  margin: 12px 0 20px;
  color: var(--paper);
}

.page-faq .faq-hero-main .section-lede {
  max-width: 62ch;
}

.page-faq .faq-hero-stats {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--faq-line);
}

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

.page-faq .faq-hero-stats .stat-value {
  font-family: var(--font-mono);
  font-size: clamp(26px, 5vw, 36px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan-glow);
}

.page-faq .faq-hero-stats .stat--amber .stat-value {
  color: var(--pulse-amber);
}

.page-faq .faq-hero-stats .stat--mint .stat-value {
  color: var(--mint-signal);
}

.page-faq .faq-hero-stats .stat-label {
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist-text);
}

/* ---------- 章节目录 ---------- */

.page-faq .faq-index {
  margin-top: clamp(36px, 7vw, 64px);
  padding-top: 20px;
  border-top: 1px solid var(--blueprint-line);
}

.page-faq .faq-index-title {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mist-text);
  margin: 0 0 14px;
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
}

.page-faq .faq-index-list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--blueprint-line);
  border-radius: 999px;
  font-size: 14px;
  color: var(--paper);
  text-decoration: none;
  transition: border-color 200ms var(--ease), background-color 200ms var(--ease), color 200ms var(--ease);
}

.page-faq .faq-index-list a:hover,
.page-faq .faq-index-list a:focus-visible {
  border-color: var(--cyan-glow);
  background: rgba(47, 243, 214, 0.1);
  color: var(--cyan-glow);
}

.page-faq .faq-index-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan-glow);
}

/* ---------- 章节通用 ---------- */

.page-faq .faq-section {
  padding-top: clamp(48px, 8vw, 88px);
  padding-bottom: clamp(48px, 8vw, 88px);
}

.page-faq .faq-head {
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-faq .faq-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan-glow);
  margin-bottom: 10px;
}

.page-faq .faq-head .section-title {
  margin: 0 0 12px;
  line-height: 1.3;
}

.page-faq .faq-head .section-lede {
  max-width: 68ch;
  margin: 0;
}

/* ---------- 问答条目 ---------- */

.page-faq .faq-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--faq-line);
}

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

.page-faq .qa-q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 12px;
  padding: 20px 4px;
  cursor: pointer;
  list-style: none;
  transition: background-color 200ms var(--ease);
}

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

.page-faq .qa-q:hover {
  background: rgba(47, 243, 214, 0.05);
}

.page-faq .qa-q:focus-visible {
  outline: 2px solid var(--cyan-glow);
  outline-offset: 3px;
}

.page-faq .qa-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  line-height: 1.9;
  color: var(--mist-text);
  transition: color 200ms var(--ease);
}

.page-faq .qa-text {
  font-size: clamp(17px, 2.4vw, 20px);
  font-weight: 700;
  line-height: 1.6;
  color: var(--paper);
}

.page-faq .qa-mark {
  width: 0;
  height: 0;
  margin-top: 10px;
  border-left: 7px solid var(--cyan-glow);
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  transition: transform 260ms var(--ease), border-left-color 200ms var(--ease);
}

.page-faq .qa[open] .qa-num {
  color: var(--electric-orange);
}

.page-faq .qa[open] .qa-mark {
  transform: rotate(90deg);
  border-left-color: var(--electric-orange);
}

.page-faq .qa-a {
  padding: 0 4px 24px 34px;
}

.page-faq .qa-a p {
  margin: 0 0 12px;
  font-size: 18px;
  line-height: 1.9;
  color: var(--mist-text);
  max-width: 68ch;
}

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

.page-faq .qa-hl {
  background: rgba(47, 243, 214, 0.14);
  color: var(--cyan-glow);
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 6px;
}

.page-faq .qa-note {
  margin-top: 16px;
  padding: 12px 0 12px 16px;
  border-left: 2px solid var(--cyan-glow);
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist-text);
  background: linear-gradient(90deg, rgba(47, 243, 214, 0.07), transparent 70%);
}

/* ---------- 图片 ---------- */

.page-faq .faq-figure {
  margin: clamp(28px, 5vw, 48px) 0 0;
}

.page-faq .faq-figure .figure-frame {
  aspect-ratio: 3 / 2;
  border-radius: var(--radius-l);
  overflow: hidden;
  background: var(--navy-layer);
  border: 1px solid var(--blueprint-line);
}

.page-faq .faq-figure--flow .figure-frame {
  aspect-ratio: 2 / 1;
}

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

.page-faq .faq-figure .figure-caption {
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist-text);
}

/* ---------- 反馈流程 ---------- */

.page-faq .faq-flow {
  list-style: none;
  margin: 0 0 clamp(24px, 4vw, 40px);
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-faq .faq-flow-step {
  position: relative;
  padding: 20px 20px 20px 22px;
  border-radius: var(--radius-m);
  background: rgba(8, 24, 46, 0.5);
  border: 1px solid rgba(47, 243, 214, 0.18);
  transition: border-color 220ms var(--ease), transform 220ms var(--ease), background-color 220ms var(--ease);
}

.page-faq .faq-flow-step:hover,
.page-faq .faq-flow-step:focus-within {
  border-color: var(--cyan-glow);
  background: rgba(47, 243, 214, 0.08);
  transform: translateY(-3px);
}

.page-faq .faq-flow-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan-glow);
  margin-bottom: 8px;
}

.page-faq .faq-flow-step:hover .faq-flow-num,
.page-faq .faq-flow-step:focus-within .faq-flow-num {
  color: var(--electric-orange);
}

.page-faq .faq-flow-title {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-flow-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist-text);
}

.page-faq .faq-feedback-meta {
  margin-top: clamp(20px, 4vw, 32px);
  padding-top: 20px;
  border-top: 1px solid var(--blueprint-line);
}

.page-faq .faq-feedback-line {
  margin: 0 0 8px;
  font-size: 18px;
  line-height: 1.8;
  color: var(--paper);
}

.page-faq .faq-feedback-line a {
  color: var(--cyan-glow);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 243, 214, 0.4);
}

.page-faq .faq-feedback-line a:hover,
.page-faq .faq-feedback-line a:focus-visible {
  border-bottom-color: var(--cyan-glow);
}

.page-faq .faq-feedback-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist-text);
  max-width: 68ch;
}

/* ---------- 延伸入口 ---------- */

.page-faq .faq-next-grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(24px, 4vw, 36px);
}

.page-faq .faq-next-card {
  display: grid;
  gap: 8px;
  padding: 22px 20px;
  border: 1px solid var(--blueprint-line);
  border-radius: var(--radius-m);
  background: var(--faq-panel);
  text-decoration: none;
  transition: border-color 220ms var(--ease), transform 220ms var(--ease), background-color 220ms var(--ease);
}

.page-faq .faq-next-card:hover,
.page-faq .faq-next-card:focus-visible {
  border-color: var(--cyan-glow);
  background: rgba(47, 243, 214, 0.07);
  transform: translateY(-3px);
}

.page-faq .faq-next-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan-glow);
}

.page-faq .faq-next-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-next-text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist-text);
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-next-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-faq .qa-a {
    padding-left: 46px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
  }

  .page-faq .faq-flow-step::after {
    content: "";
    position: absolute;
    top: 30px;
    right: -14px;
    width: 8px;
    height: 1px;
    background: var(--blueprint-line);
  }

  .page-faq .faq-flow-step:last-child::after {
    display: none;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(40px, 6vw, 72px);
    align-items: end;
  }

  .page-faq .qa-a--split {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 250px;
    gap: 40px;
    align-items: start;
    padding-right: 8px;
  }

  .page-faq .qa-a--split .qa-note {
    margin-top: 4px;
  }

  .page-faq .faq-next-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .qa-q {
    padding: 24px 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-mark,
  .page-faq .qa-num,
  .page-faq .qa-q,
  .page-faq .faq-flow-step,
  .page-faq .faq-next-card,
  .page-faq .faq-index-list a {
    transition: none;
  }

  .page-faq .faq-flow-step:hover,
  .page-faq .faq-flow-step:focus-within,
  .page-faq .faq-next-card:hover,
  .page-faq .faq-next-card:focus-visible {
    transform: none;
  }
}