.page-faq {
  --faq-idx-w: 246px;
  --faq-gap: clamp(28px, 4.5vw, 56px);
  --faq-answer: #D5DDEF;
  display: block;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 5vw, 56px) 0 clamp(26px, 4vw, 44px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(44, 55, 102, 0.42) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(44, 55, 102, 0.42) 1px, transparent 1px);
  background-size: 62px 62px;
  -webkit-mask-image: radial-gradient(78% 86% at 42% 0%, #000 8%, transparent 76%);
  mask-image: radial-gradient(78% 86% at 42% 0%, #000 8%, transparent 76%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(620px 320px at 14% 4%, rgba(43, 240, 194, 0.16), transparent 64%),
    radial-gradient(520px 300px at 88% 12%, rgba(255, 138, 61, 0.13), transparent 62%);
  pointer-events: none;
}

.page-faq .faq-hero .container {
  position: relative;
  z-index: 1;
}

.page-faq .faq-crumb {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-faq .faq-crumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-crumb a:hover,
.page-faq .faq-crumb a:focus-visible {
  color: var(--mint);
  border-bottom-color: var(--mint);
}

.page-faq .faq-crumb .breadcrumb-sep {
  margin: 0 8px;
  color: var(--line);
}

.page-faq .faq-kicker {
  color: var(--mint);
}

.page-faq .faq-title {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: clamp(2rem, 5.4vw, 3.4rem);
  line-height: 1.14;
  color: var(--text);
  max-width: 20ch;
}

.page-faq .faq-lead {
  margin: 18px 0 0;
  max-width: 62ch;
  color: var(--muted);
  font-size: clamp(16px, 1.6vw, 17.5px);
  line-height: 1.78;
}

.page-faq .faq-hero-meta {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 三步流程 ---------- */
.page-faq .faq-flow-section {
  padding-top: clamp(24px, 4vw, 44px);
}

.page-faq .faq-sub {
  margin: 12px 0 0;
  max-width: 58ch;
  color: var(--muted);
  font-size: 15.5px;
  line-height: 1.75;
}

.page-faq .flow-strip {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}

.page-faq .flow-step {
  position: relative;
  padding: 22px 22px 24px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(18, 21, 31, 0.92), rgba(10, 14, 39, 0.7));
  transition:
    border-color 0.3s var(--ease),
    transform 0.3s var(--ease),
    box-shadow 0.3s var(--ease);
}

.page-faq .flow-step::after {
  content: "";
  position: absolute;
  left: 22px;
  right: 22px;
  bottom: 0;
  height: 2px;
  border-radius: var(--r-pill);
  background: linear-gradient(90deg, var(--mint), rgba(43, 240, 194, 0));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.42s var(--ease);
}

.page-faq .flow-step:hover,
.page-faq .flow-step:focus-within {
  border-color: rgba(43, 240, 194, 0.6);
  transform: translateY(-4px);
  box-shadow: 0 20px 42px -26px rgba(43, 240, 194, 0.6);
}

.page-faq .flow-step:hover::after,
.page-faq .flow-step:focus-within::after {
  transform: scaleX(1);
}

.page-faq .flow-step:nth-child(2) { transition-delay: 0.05s; }
.page-faq .flow-step:nth-child(3) { transition-delay: 0.1s; }

.page-faq .flow-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(43, 240, 194, 0.45);
  background: rgba(43, 240, 194, 0.11);
  color: var(--mint);
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-faq .flow-title {
  margin: 16px 0 8px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .flow-text {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.72;
}

/* ---------- 主区：索引 + 问答流 ---------- */
.page-faq .faq-main-section {
  padding-top: clamp(32px, 5vw, 60px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  align-items: start;
}

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

.page-faq .index-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .index-list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .toc-link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 10px 15px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-soft);
  background: rgba(18, 21, 31, 0.6);
  color: var(--muted);
  font-size: 14px;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition:
    color 0.24s var(--ease),
    border-color 0.24s var(--ease),
    background-color 0.24s var(--ease);
}

.page-faq .toc-mark {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mint);
}

.page-faq .toc-link:hover,
.page-faq .toc-link:focus-visible {
  color: var(--text);
  border-color: rgba(43, 240, 194, 0.5);
}

.page-faq .toc-link.is-active,
.page-faq .toc-link[aria-current="true"] {
  color: var(--text);
  border-color: var(--mint);
  background: rgba(43, 240, 194, 0.1);
  box-shadow: 0 0 0 1px rgba(43, 240, 194, 0.22);
}

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

.page-faq .faq-group {
  scroll-margin-top: 130px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(38px, 6vw, 66px);
  padding-top: clamp(28px, 4vw, 44px);
  border-top: 1px solid var(--line-faint);
}

.page-faq .group-head {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: 6px;
}

.page-faq .group-num {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  height: 26px;
  padding: 0 10px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(43, 240, 194, 0.42);
  background: rgba(43, 240, 194, 0.09);
  color: var(--mint);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
}

.page-faq .group-title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: clamp(1.3rem, 3vw, 1.75rem);
  line-height: 1.3;
  color: var(--text);
}

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

.page-faq .accordion-item {
  position: relative;
  border-bottom: 1px solid var(--line-faint);
}

.page-faq .accordion-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 3px;
  border-radius: var(--r-pill);
  background: var(--mint);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 0.32s var(--ease);
}

.page-faq .accordion-item:has(.accordion-trigger[aria-expanded="true"])::before {
  transform: scaleY(1);
}

.page-faq .accordion-trigger {
  width: 100%;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 12px 18px 18px;
  background: none;
  border: 0;
  cursor: pointer;
  text-align: left;
  color: var(--text);
  font-family: var(--font-head);
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.62;
  letter-spacing: -0.005em;
  transition: color 0.22s var(--ease);
}

.page-faq .accordion-trigger:hover,
.page-faq .accordion-trigger:focus-visible {
  color: var(--mint);
}

.page-faq .q-text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .accordion-marker {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin-top: 5px;
}

.page-faq .accordion-marker::before,
.page-faq .accordion-marker::after {
  content: "";
  position: absolute;
  background: var(--mint);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

.page-faq .accordion-marker::before {
  left: 0;
  right: 0;
  top: 8px;
  height: 2px;
}

.page-faq .accordion-marker::after {
  top: 0;
  bottom: 0;
  left: 8px;
  width: 2px;
}

.page-faq .accordion-trigger[aria-expanded="true"] .accordion-marker::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .accordion-panel {
  padding: 0 20px 22px 50px;
}

.page-faq .accordion-panel p {
  margin: 0;
  color: var(--faq-answer);
  font-size: 15.5px;
  line-height: 1.78;
}

.page-faq .accordion-panel a {
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 240, 194, 0.45);
  transition: border-color 0.2s var(--ease);
}

.page-faq .accordion-panel a:hover,
.page-faq .accordion-panel a:focus-visible {
  border-bottom-color: var(--mint);
}

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

/* ---------- 配图 ---------- */
.page-faq .q-apple-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  margin-top: 6px;
}

.page-faq .faq-figure,
.page-faq .faq-banner {
  margin: 0;
}

.page-faq .faq-figure figcaption,
.page-faq .faq-banner figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

.page-faq .faq-figure .media-frame,
.page-faq .faq-banner .media-frame {
  border-radius: var(--r-lg);
  border: 1px solid var(--line-soft);
  overflow: hidden;
  box-shadow: inset 0 0 0 1px rgba(43, 240, 194, 0.06);
}

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

.page-faq .faq-banner {
  margin: 18px 0 22px;
}

/* ---------- 术语卡片 ---------- */
.page-faq .term-grid {
  margin-top: 20px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-faq .term-card {
  padding: 20px 20px 22px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line-soft);
  background: linear-gradient(160deg, rgba(36, 27, 69, 0.62), rgba(18, 21, 31, 0.86));
  transition: border-color 0.26s var(--ease), transform 0.26s var(--ease);
}

.page-faq .term-card:hover {
  border-color: rgba(43, 240, 194, 0.45);
  transform: translateY(-3px);
}

.page-faq .term-name {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--mint);
}

.page-faq .term-def {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.76;
}

.page-faq .term-note {
  margin: 24px 0 0;
  padding: 18px 20px;
  border-radius: var(--r-md);
  border-left: 3px solid var(--amber);
  background: rgba(18, 21, 31, 0.72);
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.78;
}

.page-faq .term-note a {
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 240, 194, 0.45);
}

.page-faq .term-note a:hover,
.page-faq .term-note a:focus-visible {
  border-bottom-color: var(--mint);
}

/* ---------- 尾部行动 ---------- */
.page-faq .faq-cta-section {
  padding-top: clamp(36px, 6vw, 68px);
  padding-bottom: clamp(40px, 6vw, 72px);
}

.page-faq .faq-cta {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: center;
  padding: clamp(26px, 4vw, 44px);
  border-radius: var(--r-xl);
  border: 1px solid rgba(255, 138, 61, 0.34);
  background:
    radial-gradient(560px 260px at 90% -10%, rgba(255, 138, 61, 0.2), transparent 66%),
    linear-gradient(150deg, rgba(74, 27, 51, 0.72), rgba(10, 14, 39, 0.9));
}

.page-faq .cta-copy h2 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: clamp(1.4rem, 3.4vw, 2rem);
  line-height: 1.28;
  color: var(--text);
}

.page-faq .cta-copy p {
  margin: 12px 0 0;
  max-width: 52ch;
  color: var(--muted);
  font-size: 15.5px;
  line-height: 1.78;
}

.page-faq .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-faq .flow-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .term-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  }

  .page-faq .cta-actions {
    justify-content: flex-end;
  }
}

@media (min-width: 880px) {
  .page-faq .q-apple-body {
    grid-template-columns: minmax(0, 1fr) 218px;
    gap: 32px;
    align-items: start;
  }

  .page-faq .faq-figure {
    position: sticky;
    top: 132px;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-idx-w) minmax(0, 1fr);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 124px;
  }

  .page-faq .index-list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .toc-link {
    border-radius: var(--r-md);
    white-space: normal;
    padding: 12px 14px;
    font-size: 14px;
  }

  .page-faq .term-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-title {
    max-width: 22ch;
  }
}

@media (min-width: 1180px) {
  .page-faq .accordion-trigger {
    font-size: 17px;
  }

  .page-faq .accordion-panel p {
    font-size: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .flow-step,
  .page-faq .flow-step::after,
  .page-faq .term-card,
  .page-faq .toc-link,
  .page-faq .accordion-marker::before,
  .page-faq .accordion-marker::after,
  .page-faq .accordion-item::before {
    transition: none !important;
  }

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