.page-faq {
  background:
    radial-gradient(120% 90% at 88% -12%, rgba(24, 224, 255, 0.13), transparent 58%),
    radial-gradient(85% 60% at -10% 105%, rgba(255, 106, 42, 0.10), transparent 62%),
    var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  padding-bottom: clamp(48px, 7vw, 88px);
  overflow-x: clip;
}

.page-faq .breadcrumbs {
  padding-top: clamp(16px, 2.4vw, 26px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--text-dim);
}

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

.page-faq .breadcrumbs a:hover,
.page-faq .breadcrumbs a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: clamp(18px, 2.6vw, 30px);
}

.page-faq .faq-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 52px);
  align-items: center;
  padding: clamp(22px, 4vw, 54px);
  border: 2px solid var(--edge);
  background: linear-gradient(150deg, #0e2a47 0%, #0a2238 48%, #061727 100%);
  box-shadow: var(--shadow-hard);
  position: relative;
  isolation: isolate;
}

.page-faq .faq-hero-grid::before {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -42%;
  width: min(420px, 62%);
  aspect-ratio: 1;
  background: conic-gradient(from 210deg, rgba(24, 224, 255, 0.22), rgba(10, 169, 184, 0) 58%);
  filter: blur(16px);
  z-index: -1;
}

.page-faq .faq-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--accent);
}

.page-faq .faq-hero h1 {
  margin: 16px 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5.4vw, 58px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--mist);
}

.page-faq .faq-hero h1 em {
  font-style: normal;
  background: linear-gradient(96deg, var(--cyan), var(--lime));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-faq .faq-lede {
  max-width: 56ch;
  margin: 0;
  font-size: clamp(15px, 2vw, 17px);
  line-height: 1.8;
  color: var(--text-dim);
}

.page-faq .faq-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 30px;
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px dashed rgba(143, 166, 184, 0.35);
}

.page-faq .faq-stat b {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(18px, 2.6vw, 22px);
  color: var(--cyan);
  letter-spacing: 0.01em;
}

.page-faq .faq-stat span {
  display: block;
  margin-top: 2px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--text-dim);
}

.page-faq .faq-visual {
  margin: 0;
  position: relative;
  border: 2px solid var(--edge);
  background: #050f1b;
  box-shadow: 10px 10px 0 0 #040f1d;
}

.page-faq .faq-visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .faq-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(200deg, rgba(7, 26, 47, 0) 42%, rgba(7, 26, 47, 0.62) 100%);
  pointer-events: none;
}

.page-faq .faq-visual figcaption {
  position: relative;
  z-index: 1;
  padding: 10px 14px;
  border-top: 2px solid var(--edge);
  background: #061625;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--text-dim);
}

/* ---------- 分类筛选条 ---------- */
.page-faq .faq-filter {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: clamp(18px, 3vw, 30px) 0;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-chip {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border: 2px solid var(--edge);
  background: #0b2238;
  color: var(--mist);
  font-size: 14px;
  text-decoration: none;
  scroll-snap-align: start;
  transition: border-color 0.22s var(--ease), background 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-faq .faq-chip span {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--accent);
}

.page-faq .faq-chip:hover,
.page-faq .faq-chip:focus-visible {
  border-color: var(--cyan);
  background: #103050;
  transform: translateY(-2px);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 40px);
  align-items: start;
}

.page-faq .faq-index {
  border: 2px solid var(--edge);
  background: linear-gradient(180deg, #0b2338, #081b2c);
  box-shadow: 6px 6px 0 0 #040f1d;
  padding: 20px 18px;
}

.page-faq .faq-index-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.page-faq .faq-index ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-index a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding: 9px 8px;
  border-left: 2px solid transparent;
  color: var(--mist);
  font-size: 14px;
  text-decoration: none;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), color 0.2s var(--ease);
}

.page-faq .faq-index a b {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  color: var(--silver);
}

.page-faq .faq-index a:hover,
.page-faq .faq-index a:focus-visible {
  border-left-color: var(--orange);
  background: rgba(24, 224, 255, 0.08);
  color: var(--cyan);
}

.page-faq .faq-index-note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--edge);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-faq .faq-top {
  display: inline-block;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--accent);
  text-decoration: none;
}

.page-faq .faq-top:hover,
.page-faq .faq-top:focus-visible {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-group {
  padding-top: clamp(28px, 3.6vw, 48px);
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.page-faq .faq-group:first-child {
  padding-top: 0;
}

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

.page-faq .faq-group-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-faq .faq-group-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 3vw, 28px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-faq .faq-group-note {
  margin: 12px 0 4px;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa {
  border-bottom: 1px solid var(--edge);
}

.page-faq .qa summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
  padding: 18px 2px;
  cursor: pointer;
  list-style: none;
  outline-offset: 4px;
}

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

.page-faq .qa-num {
  padding-top: 5px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--silver);
}

.page-faq .qa-q {
  font-size: clamp(15px, 1.9vw, 18px);
  font-weight: 600;
  line-height: 1.55;
  color: var(--mist);
  transition: color 0.2s var(--ease);
}

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

.page-faq .qa-icon {
  position: relative;
  width: 26px;
  height: 26px;
  flex: 0 0 auto;
  border: 2px solid var(--edge);
  background: #0b2338;
  transition: transform 0.28s var(--ease), background 0.28s var(--ease), border-color 0.28s var(--ease);
}

.page-faq .qa-icon::before,
.page-faq .qa-icon::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: background 0.28s var(--ease);
}

.page-faq .qa-icon::before {
  left: 50%;
  top: 6px;
  bottom: 6px;
  width: 2px;
  transform: translateX(-50%);
}

.page-faq .qa-icon::after {
  top: 50%;
  left: 6px;
  right: 6px;
  height: 2px;
  transform: translateY(-50%);
}

.page-faq .qa[open] .qa-icon {
  background: var(--orange);
  border-color: var(--orange);
  transform: rotate(135deg);
}

.page-faq .qa[open] .qa-icon::before,
.page-faq .qa[open] .qa-icon::after {
  background: #071a2f;
}

.page-faq .qa-a {
  padding: 0 0 22px;
}

.page-faq .qa-a-inner {
  padding-left: 16px;
  border-left: 2px solid rgba(24, 224, 255, 0.35);
}

.page-faq .qa-a p {
  margin: 0 0 10px;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-dim);
}

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

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

.page-faq .qa-a a:hover,
.page-faq .qa-a a:focus-visible {
  color: var(--lime);
}

/* ---------- 步骤条 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 22px 0 6px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 14px 16px;
  border: 2px solid var(--edge);
  background: rgba(14, 42, 71, 0.55);
}

.page-faq .faq-steps b {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  background: var(--lime);
  color: #071a2f;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.page-faq .faq-steps span {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-visual--sync {
  margin: 22px 0 8px;
}

.page-faq .faq-visual--sync img {
  aspect-ratio: 3 / 2;
}

/* ---------- 联系方式 ---------- */
.page-faq .faq-contact {
  display: grid;
  gap: 14px;
  margin: 22px 0 0;
}

.page-faq .contact-card {
  border: 2px solid var(--edge);
  background: linear-gradient(160deg, #0d2944, #081b2c);
  padding: 18px 20px;
  box-shadow: 5px 5px 0 0 #040f1d;
}

.page-faq .contact-card dt {
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--text-dim);
}

.page-faq .contact-card dd {
  margin: 0;
  font-size: clamp(15px, 1.9vw, 17px);
  line-height: 1.6;
  color: var(--mist);
  word-break: break-word;
}

.page-faq .contact-card dd span {
  display: block;
  margin-top: 6px;
  font-family: var(--font-body);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-dim);
}

.page-faq .faq-contact-note {
  margin: 20px 0 0;
  max-width: 64ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

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

.page-faq .faq-contact-note a:hover,
.page-faq .faq-contact-note a:focus-visible {
  color: var(--lime);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: 6fr 5fr;
    align-items: center;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-body {
    grid-template-columns: 268px minmax(0, 1fr);
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 18px);
  }

  .page-faq .faq-filter {
    flex-wrap: wrap;
    overflow-x: visible;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: 7fr 5fr;
    gap: clamp(36px, 4vw, 64px);
  }
}

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

  .page-faq .faq-chip:hover,
  .page-faq .faq-chip:focus-visible {
    transform: none;
  }
}