.page-faq {
  --faq-panel: rgba(17, 24, 39, 0.72);
  --faq-edge: rgba(148, 163, 184, 0.16);
  display: block;
  background:
    radial-gradient(1100px 600px at 90% -6%, rgba(182, 255, 60, 0.09), transparent 62%),
    radial-gradient(880px 520px at 2% 10%, rgba(125, 211, 252, 0.11), transparent 60%),
    var(--ink);
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(22px, 5vw, 46px) 0 clamp(20px, 4vw, 40px);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(125, 211, 252, 0.35), transparent);
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: 20px;
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: 26px;
  align-items: center;
}

.page-faq .faq-kicker {
  display: inline-block;
  margin: 0 0 16px;
  padding: 6px 14px;
  border: 1px solid rgba(182, 255, 60, 0.34);
  border-radius: var(--pill);
  background: rgba(182, 255, 60, 0.07);
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.page-faq h1 {
  margin: 0 0 18px;
  font-size: clamp(28px, 6.4vw, 54px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq h1::before {
  content: "";
  display: block;
  width: 56px;
  height: 5px;
  margin-bottom: 18px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--lime), var(--ice));
}

.page-faq .faq-lede {
  margin: 0 0 24px;
  max-width: 58ch;
  color: #c7d2e0;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.8;
}

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

.page-faq .faq-hero-media {
  margin: 0;
  border: 1px solid var(--faq-edge);
  border-radius: var(--radius-lg);
  background: var(--ink-2);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

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

.page-faq .faq-hero-media .img-caption {
  padding: 10px 16px 14px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-layout {
  padding-top: clamp(24px, 4vw, 42px);
  padding-bottom: clamp(48px, 9vw, 96px);
}

.page-faq .faq-rail {
  position: sticky;
  top: 66px;
  z-index: 5;
  margin: 0 0 20px;
  padding: 10px 0 12px;
  background: linear-gradient(180deg, rgba(10, 15, 31, 0.98) 62%, rgba(10, 15, 31, 0));
}

.page-faq .faq-rail-title {
  display: none;
  margin: 0 0 8px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.page-faq .faq-rail-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 4px 2px 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-faq .faq-rail-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  padding: 9px 15px;
  border: 1px solid var(--faq-edge);
  border-radius: var(--pill);
  background: rgba(30, 41, 59, 0.6);
  color: #c7d2e0;
  font-size: 13.5px;
  font-weight: 600;
  white-space: nowrap;
  text-decoration: none;
  transition: color 0.22s var(--ease), background 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-faq .faq-rail-link:hover {
  color: var(--paper);
  border-color: rgba(125, 211, 252, 0.55);
  background: rgba(30, 41, 59, 0.92);
}

.page-faq .faq-rail-link.is-active {
  color: var(--ink);
  background: var(--lime);
  border-color: var(--lime);
}

.page-faq .faq-rail-num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  opacity: 0.72;
}

.page-faq .faq-rail-link.is-active .faq-rail-num {
  opacity: 0.62;
}

/* ---------- 区块 ---------- */
.page-faq .faq-section {
  padding-top: clamp(26px, 4.5vw, 46px);
  scroll-margin-top: 118px;
}

.page-faq .faq-section-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 10px;
}

.page-faq .faq-section-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-faq .faq-section h2 {
  margin: 0;
  font-size: clamp(21px, 3.6vw, 30px);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-section-sub {
  margin: 0 0 20px;
  max-width: 62ch;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

/* ---------- 问答折叠 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 10px;
}

.page-faq .faq-item {
  margin: 0;
  border: 1px solid var(--faq-edge);
  border-left: 3px solid rgba(125, 211, 252, 0.45);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(30, 41, 59, 0.48), rgba(17, 24, 39, 0.68));
  overflow: hidden;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-faq .faq-item[open] {
  border-left-color: var(--lime);
  background: linear-gradient(180deg, rgba(30, 41, 59, 0.8), rgba(17, 24, 39, 0.88));
}

.page-faq .faq-item summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  color: var(--paper);
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.5;
}

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

.page-faq .faq-item summary::after {
  content: "";
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin-left: auto;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: rotate(45deg);
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-faq .faq-item[open] summary::after {
  transform: rotate(-135deg);
  border-color: var(--lime);
}

.page-faq .faq-q-icon {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 8px;
  background: rgba(125, 211, 252, 0.14);
  color: var(--ice);
  transition: background 0.25s var(--ease), color 0.25s var(--ease);
}

.page-faq .faq-item[open] .faq-q-icon {
  background: rgba(182, 255, 60, 0.16);
  color: var(--lime);
}

.page-faq .faq-q-icon svg {
  display: block;
  width: 15px;
  height: 15px;
}

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

.page-faq .faq-tag {
  flex: 0 0 auto;
  padding: 3px 9px;
  border: 1px solid rgba(255, 138, 42, 0.5);
  border-radius: var(--pill);
  background: rgba(255, 138, 42, 0.1);
  color: var(--orange);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
}

.page-faq .faq-a {
  padding: 14px 18px 18px 54px;
  border-top: 1px solid var(--faq-edge);
  color: #c7d2e0;
  font-size: 15px;
  line-height: 1.8;
}

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

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

.page-faq .faq-a ul {
  display: grid;
  gap: 6px;
  margin: 12px 0 0;
  padding-left: 18px;
}

.page-faq .faq-a li::marker {
  color: var(--lime);
}

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

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

/* ---------- 侧贴卡片 ---------- */
.page-faq .faq-split {
  display: grid;
  gap: 18px;
}

.page-faq .faq-spot {
  align-self: start;
  padding: 14px;
  border: 1px solid var(--faq-edge);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(125, 211, 252, 0.1), rgba(17, 24, 39, 0.85));
}

.page-faq .faq-spot-media {
  margin: 0 0 14px;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-2);
}

.page-faq .faq-spot-media img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 260px;
  object-fit: cover;
}

.page-faq .faq-spot-title {
  margin: 0 0 8px;
  color: var(--paper);
  font-size: 16px;
  font-weight: 800;
  line-height: 1.4;
}

.page-faq .faq-spot-text {
  margin: 0;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.75;
}

/* ---------- 底部提示 ---------- */
.page-faq .faq-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: clamp(34px, 6vw, 60px);
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid rgba(255, 138, 42, 0.34);
  border-radius: var(--radius-lg);
  background: linear-gradient(120deg, rgba(255, 138, 42, 0.14), rgba(17, 24, 39, 0.9));
}

.page-faq .faq-cta-body {
  max-width: 62ch;
}

.page-faq .faq-cta-kicker {
  margin: 0 0 6px;
  color: var(--orange);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.page-faq .faq-cta-text {
  margin: 0;
  color: #c7d2e0;
  font-size: 14.5px;
  line-height: 1.75;
}

/* ---------- 回到顶部 ---------- */
.page-faq .to-top {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 40;
  display: inline-flex;
  align-items: center;
  padding: 10px 16px;
  border: 1px solid var(--faq-edge);
  border-radius: var(--pill);
  background: rgba(30, 41, 59, 0.94);
  color: var(--paper);
  font-size: 12.5px;
  font-weight: 600;
  text-decoration: none;
}

.page-faq .to-top:hover {
  border-color: rgba(182, 255, 60, 0.55);
  color: var(--lime);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    gap: clamp(24px, 3.5vw, 44px);
  }

  .page-faq .faq-item summary {
    padding: 17px 20px;
    font-size: 16px;
  }

  .page-faq .faq-a {
    padding: 16px 22px 20px 58px;
  }

  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.55fr);
    gap: clamp(18px, 2.6vw, 30px);
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    display: grid;
    grid-template-columns: 226px minmax(0, 1fr);
    gap: clamp(30px, 4vw, 58px);
    align-items: start;
  }

  .page-faq .faq-rail {
    top: 96px;
    margin: 0;
    padding: 4px 0 0;
    background: none;
  }

  .page-faq .faq-rail-title {
    display: block;
  }

  .page-faq .faq-rail-list {
    flex-direction: column;
    gap: 5px;
    padding: 0;
    overflow: visible;
  }

  .page-faq .faq-rail-link {
    width: 100%;
    justify-content: flex-start;
    padding: 11px 15px;
    border-radius: var(--radius);
    background: transparent;
    border-color: transparent;
    border-left: 2px solid transparent;
    font-size: 14px;
  }

  .page-faq .faq-rail-link:hover {
    background: rgba(30, 41, 59, 0.7);
    border-left-color: rgba(125, 211, 252, 0.6);
  }

  .page-faq .faq-rail-link.is-active {
    background: rgba(182, 255, 60, 0.12);
    border-color: rgba(182, 255, 60, 0.4);
    border-left-color: var(--lime);
    color: var(--lime);
  }

  .page-faq .faq-section {
    scroll-margin-top: 108px;
  }

  .page-faq .faq-section h2 {
    font-size: clamp(24px, 2.4vw, 32px);
  }
}

@media (max-width: 640px) {
  .page-faq .faq-a {
    padding-left: 18px;
  }

  .page-faq .faq-tag {
    display: none;
  }

  .page-faq .faq-spot-media img {
    max-height: none;
  }
}