.page-faq {
  --page-radius: 20px;
  --page-card-bg: rgba(18, 26, 37, 0.72);
  --page-card-bg-solid: #121A25;
  --page-paper: #F4F1EA;
  --page-paper-text: #1F2937;
  --page-brand: #00E0FF;
  --page-accent: #00FF9D;
  --page-gold: #FFC400;
  --page-border: rgba(178, 220, 255, 0.18);
  --page-text: #F1F5F9;
  --page-text-secondary: #94A3B8;
  --page-data-font: 'SF Mono', 'Cascadia Code', 'Consolas', 'Roboto Mono', monospace;
  --page-head-font: 'Arial Narrow', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  --page-body-font: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  --page-max-width: 1200px;
  --page-gutter: 20px;
  background-color: #0A0E17;
  color: var(--page-text);
  font-family: var(--page-body-font);
  line-height: 1.7;
  overflow-x: hidden;
  position: relative;
  z-index: 1;
}

.page-faq__hero {
  background-color: #0A0E17;
  padding: 24px var(--page-gutter) 32px;
  border-bottom: 1px solid var(--page-border);
  position: relative;
}

.page-faq__hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(circle at 15% 25%, rgba(0, 224, 255, 0.08), transparent 30%),
    radial-gradient(circle at 82% 60%, rgba(0, 255, 157, 0.05), transparent 32%);
  z-index: 0;
}

.page-faq__hero-inner {
  max-width: var(--page-max-width);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.page-faq__hero .yx-breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  padding: 0;
  margin: 0 0 28px;
  font-size: 13px;
}

.page-faq__hero .yx-breadcrumb li {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--page-text-secondary);
}

.page-faq__hero .yx-breadcrumb li + li::before {
  content: "/";
  color: rgba(178, 220, 255, 0.35);
}

.page-faq__hero .yx-breadcrumb a {
  color: var(--page-text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-faq__hero .yx-breadcrumb a:hover {
  color: var(--page-brand);
}

.page-faq__hero-head {
  max-width: 820px;
}

.page-faq__hero-head .yx-eyebrow {
  display: inline-block;
  font-family: var(--page-data-font);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--page-accent);
  border: 1px solid rgba(0, 255, 157, 0.4);
  border-radius: 999px;
  padding: 4px 14px;
  margin-bottom: 18px;
}

.page-faq__hero-title {
  font-family: var(--page-head-font);
  font-weight: 800;
  font-size: clamp(28px, 4.5vw, 46px);
  line-height: 1.1;
  margin: 0 0 16px;
  color: var(--page-text);
  letter-spacing: 0.01em;
}

.page-faq__hero-desc {
  font-size: 16px;
  line-height: 1.75;
  color: var(--page-text-secondary);
  max-width: 720px;
  margin-bottom: 28px;
}

.page-faq__hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 0;
  padding: 0;
}

.page-faq__hero-stats div {
  background: rgba(18, 26, 37, 0.9);
  border: 1px solid var(--page-border);
  border-radius: 14px;
  padding: 14px 18px;
  min-width: 160px;
  transition: border-color 0.2s ease;
}

.page-faq__hero-stats div:hover {
  border-color: var(--page-brand);
}

.page-faq__hero-stats dt {
  font-size: 12px;
  color: var(--page-text-secondary);
  margin-bottom: 4px;
  font-family: var(--page-body-font);
}

.page-faq__hero-stats dd {
  margin: 0;
  font-family: var(--page-data-font);
  font-size: 15px;
  color: var(--page-accent);
}

.page-faq__layout {
  max-width: var(--page-max-width);
  margin: 0 auto;
  padding: var(--page-gutter);
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: start;
}

.page-faq__index {
  position: sticky;
  top: 84px;
  z-index: 5;
}

.page-faq__index-card {
  background: var(--page-card-bg);
  border: 1px solid var(--page-border);
  border-radius: var(--page-radius);
  padding: 22px 20px;
  backdrop-filter: blur(8px);
}

.page-faq__index-card .yx-eyebrow {
  font-family: var(--page-data-font);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--page-brand);
  margin-bottom: 6px;
}

.page-faq__index-heading {
  font-family: var(--page-head-font);
  font-weight: 700;
  font-size: 20px;
  margin: 0 0 18px;
  color: var(--page-text);
}

.page-faq__index-nav {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-faq__index-group {
  border-top: 1px dashed rgba(178, 220, 255, 0.2);
  padding-top: 12px;
}

.page-faq__index-cat {
  font-family: var(--page-data-font);
  font-size: 12px;
  color: var(--page-gold);
  margin-bottom: 8px;
  letter-spacing: 0.08em;
}

.page-faq__index-group a {
  display: block;
  font-size: 14px;
  line-height: 1.5;
  color: var(--page-text-secondary);
  text-decoration: none;
  padding: 5px 0;
  border-left: 2px solid transparent;
  padding-left: 12px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-faq__index-group a:hover {
  color: var(--page-brand);
  border-left-color: var(--page-brand);
}

.page-faq__content {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.page-faq__section {
  scroll-margin-top: 80px;
}

.page-faq__section-head {
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px double rgba(178, 220, 255, 0.2);
}

.page-faq__section-head .yx-eyebrow {
  font-family: var(--page-data-font);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--page-brand);
  margin-bottom: 4px;
}

.page-faq__section-title {
  font-family: var(--page-head-font);
  font-weight: 800;
  font-size: clamp(22px, 2.8vw, 28px);
  line-height: 1.2;
  margin: 0 0 6px;
  color: var(--page-text);
}

.page-faq__section-lead {
  font-size: 14px;
  color: var(--page-text-secondary);
  margin: 0;
  max-width: 640px;
}

.page-faq__qa-grid {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-faq__qa {
  background: var(--page-card-bg-solid);
  border: 1px solid var(--page-border);
  border-radius: 16px;
  overflow: hidden;
  transition: border-color 0.2s ease, transform 0.2s ease;
  position: relative;
}

.page-faq__qa:hover {
  border-color: var(--page-brand);
  transform: translateY(-2px);
}

.page-faq__qa summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px 18px 14px;
  user-select: none;
  position: relative;
}

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

.page-faq__qa summary::after {
  content: "+";
  font-family: var(--page-data-font);
  font-size: 20px;
  color: var(--page-brand);
  margin-left: auto;
  flex-shrink: 0;
  transition: transform 0.2s ease;
  line-height: 1;
}

.page-faq__qa[open] summary::after {
  content: "–";
}

.page-faq__qa-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 1.5px solid var(--page-brand);
  color: var(--page-brand);
  font-family: var(--page-data-font);
  font-size: 13px;
  margin-top: 2px;
}

.page-faq__qa-question {
  font-family: var(--page-head-font);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.4;
  color: var(--page-text);
  flex: 1;
}

.page-faq__qa-answer {
  padding: 0 18px 18px 56px;
  color: var(--page-text-secondary);
  font-size: 14px;
}

.page-faq__qa-answer p {
  margin: 0 0 10px;
}

.page-faq__qa-answer p:last-child {
  margin-bottom: 0;
}

.page-faq__qa-extra {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 14px;
  background: rgba(18, 26, 37, 0.6);
  border: 1px solid rgba(178, 220, 255, 0.12);
  border-radius: 12px;
  padding: 12px;
}

.page-faq__qa-extra p {
  flex: 1;
  min-width: 180px;
  margin: 0;
  font-size: 12px;
  line-height: 1.6;
}

.page-faq__qa-img {
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 10px;
  display: block;
  object-fit: cover;
  background: #0A0E17;
  border: 1px solid rgba(178, 220, 255, 0.1);
}

.page-faq__qa-extra:has(.page-faq__qa-img) {
  align-items: flex-start;
}

.page-faq__qa-extra .page-faq__qa-img {
  max-width: 200px;
}

.page-faq__qa-extra:has(img[width="360"]) .page-faq__qa-img {
  max-width: 300px;
}

.page-faq__contact-cta {
  background: linear-gradient(135deg, rgba(0, 224, 255, 0.1), rgba(18, 26, 37, 0.9) 40%, rgba(18, 26, 37, 0.95));
  border: 1px solid var(--page-border);
  border-radius: var(--page-radius);
  padding: 24px 20px;
  position: relative;
  overflow: hidden;
}

.page-faq__contact-cta::before {
  content: "";
  position: absolute;
  right: -20px;
  bottom: -30px;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  border: 1px dashed rgba(0, 224, 255, 0.3);
  pointer-events: none;
}

.page-faq__contact-cta-inner {
  position: relative;
  z-index: 1;
}

.page-faq__contact-cta .yx-eyebrow {
  font-family: var(--page-data-font);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--page-accent);
  margin-bottom: 6px;
}

.page-faq__contact-title {
  font-family: var(--page-head-font);
  font-weight: 800;
  font-size: 22px;
  margin: 0 0 10px;
  color: var(--page-text);
}

.page-faq__contact-desc {
  font-size: 14px;
  color: var(--page-text-secondary);
  margin-bottom: 16px;
  max-width: 520px;
}

.page-faq__contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 14px;
}

.page-faq__contact-note {
  border-top: 1px dashed rgba(178, 220, 255, 0.2);
  padding-top: 12px;
  font-size: 12px;
  color: var(--page-text-secondary);
  line-height: 1.6;
  margin-bottom: 0;
}

.page-faq__contact-note p {
  margin: 0 0 4px;
}

.page-faq__contact-note a {
  color: var(--page-brand);
  text-decoration: none;
}

.page-faq__contact-note a:hover {
  text-decoration: underline;
}

.page-faq .yx-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--page-body-font);
  font-size: 14px;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: 999px;
  text-decoration: none;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
  border: 1px solid transparent;
  cursor: pointer;
}

.page-faq .yx-btn-primary {
  background-color: var(--page-brand);
  color: #0A0E17;
  border-color: var(--page-brand);
}

.page-faq .yx-btn-primary:hover {
  background-color: transparent;
  color: var(--page-brand);
  border-color: var(--page-brand);
}

.page-faq .yx-btn-outline {
  background-color: transparent;
  color: var(--page-text);
  border-color: var(--page-border);
}

.page-faq .yx-btn-outline:hover {
  border-color: var(--page-gold);
  color: var(--page-gold);
}

/* 桌面端 */
@media (min-width: 900px) {
  .page-faq {
    --page-gutter: 32px;
  }

  .page-faq__hero {
    padding: 40px var(--page-gutter) 48px;
  }

  .page-faq__hero-inner {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: end;
    gap: 40px;
  }

  .page-faq__hero-stats {
    justify-content: flex-end;
    flex-direction: column;
  }

  .page-faq__layout {
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 40px;
    padding: 40px var(--page-gutter) 56px;
  }

  .page-faq__index {
    top: 88px;
  }

  .page-faq__content {
    gap: 48px;
  }

  .page-faq__qa summary {
    padding: 20px 22px 16px;
  }

  .page-faq__qa-answer {
    padding: 0 22px 22px 62px;
    font-size: 15px;
  }

  .page-faq__qa-extra .page-faq__qa-img {
    max-width: 180px;
  }

  .page-faq__qa-extra:has(img[width="360"]) .page-faq__qa-img {
    max-width: 360px;
  }

  .page-faq__contact-cta {
    padding: 30px 28px;
  }

  .page-faq__contact-title {
    font-size: 24px;
  }
}

/* 窄屏小修正，防止横向溢出 */
@media (max-width: 420px) {
  .page-faq__hero-stats div {
    min-width: 100%;
  }

  .page-faq__qa-extra {
    flex-direction: column;
  }

  .page-faq__qa-extra .page-faq__qa-img {
    max-width: 100%;
  }

  .page-faq__qa-extra:has(img[width="360"]) .page-faq__qa-img {
    max-width: 100%;
  }

  .page-faq__qa-answer {
    padding-left: 18px;
  }
}