.page-faq {
  --faq-index-w: 272px;
  --faq-gap: 44px;
  --faq-green-soft: rgba(61, 255, 158, 0.12);
  --faq-orange-soft: rgba(255, 107, 53, 0.14);
}

/* ---------- Hero ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 28px 0 36px;
  overflow: hidden;
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    linear-gradient(rgba(230, 241, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(230, 241, 255, 0.04) 1px, transparent 1px);
  background-size: 42px 42px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.72), transparent 86%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.72), transparent 86%);
  pointer-events: none;
}
.page-faq .faq-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 26px;
}
.page-faq .faq-hero-grid {
  display: grid;
  gap: 26px;
  align-items: center;
}
.page-faq .faq-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent-green);
  font-family: var(--mono-font);
  font-size: 13px;
  letter-spacing: 0.08em;
}
.page-faq .faq-kicker-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-orange);
  box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.14);
}
.page-faq .faq-hero-title {
  margin: 12px 0 16px;
  font-size: clamp(28px, 5.6vw, 52px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  max-width: 840px;
  color: var(--text-main);
}
.page-faq .faq-hero-desc {
  margin: 0;
  max-width: 680px;
  color: var(--text-sub);
  font-size: 16px;
  line-height: 1.75;
}
.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}
.page-faq .faq-hero-media {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--grid-deep);
}
.page-faq .faq-hero-media::before,
.page-faq .faq-figure::before {
  content: "";
  position: absolute;
  z-index: 2;
  top: 14px;
  left: 14px;
  width: 34px;
  height: 34px;
  border-top: 2px solid var(--accent-green);
  border-left: 2px solid var(--accent-green);
  border-radius: 4px 0 0;
}
.page-faq .faq-hero-media::after,
.page-faq .faq-figure::after {
  content: "";
  position: absolute;
  z-index: 2;
  right: 14px;
  bottom: 14px;
  width: 34px;
  height: 34px;
  border-right: 2px solid var(--accent-orange);
  border-bottom: 2px solid var(--accent-orange);
  border-radius: 0 0 4px;
}
.page-faq .faq-hero-img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-faq .faq-hero-flag {
  position: absolute;
  z-index: 3;
  bottom: 16px;
  left: 16px;
  white-space: nowrap;
  background: rgba(10, 25, 47, 0.88);
  border: 1px solid rgba(61, 255, 158, 0.5);
  color: var(--accent-green);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 8px 12px;
  border-radius: var(--radius-pill);
  backdrop-filter: blur(4px);
}

/* ---------- 主体双栏布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: 30px;
  align-items: start;
  padding-bottom: 64px;
  scroll-margin-top: 88px;
}
.page-faq .faq-index-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 22px 20px;
}
.page-faq .faq-index-kicker {
  display: block;
  font-family: var(--mono-font);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-orange);
  margin-bottom: 4px;
}
.page-faq .faq-index-title {
  display: block;
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
}
.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
  padding-bottom: 4px;
}
.page-faq .faq-index-item {
  flex-shrink: 0;
  white-space: nowrap;
}
.page-faq .faq-index-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid transparent;
  color: var(--text-main);
  font-size: 14px;
  transition: background var(--ease-fast), color var(--ease-fast), border-color var(--ease-fast);
}
.page-faq .faq-index-link:hover {
  background: var(--bg-hover);
  border-color: rgba(61, 255, 158, 0.35);
  color: var(--accent-green);
}
.page-faq .faq-index-num {
  font-family: var(--mono-font);
  font-size: 12px;
  font-weight: 600;
  line-height: 1;
  padding: 5px 6px;
  border-radius: 6px;
  background: var(--faq-green-soft);
  color: var(--accent-green);
}
.page-faq .faq-index-status {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--text-sub);
  font-size: 13px;
}
.page-faq .faq-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  animation: faqPulse 2.2s ease-in-out infinite;
}
@keyframes faqPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.42; transform: scale(0.76); }
}
.page-faq .faq-index-help {
  margin-top: 16px;
  width: 100%;
  justify-content: center;
}

/* ---------- FAQ 内容区 ---------- */
.page-faq .faq-main {
  display: grid;
  gap: 6px;
  min-width: 0;
}
.page-faq .faq-section {
  padding: 28px 0 4px;
  border-top: 1px solid var(--line);
  scroll-margin-top: 88px;
}
.page-faq .faq-section:first-child {
  padding-top: 0;
  border-top: 0;
}
.page-faq .faq-section-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}
.page-faq .faq-section-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  font-family: var(--mono-font);
  font-size: 18px;
  font-weight: 700;
  color: var(--accent-green);
  background: var(--faq-green-soft);
  border: 1px solid rgba(61, 255, 158, 0.3);
}
.page-faq .faq-section-kicker {
  display: block;
  margin-bottom: 4px;
  color: var(--accent-orange);
  font-size: 13px;
  font-family: var(--mono-font);
  letter-spacing: 0.05em;
}
.page-faq .faq-section-titles h2 {
  margin: 0;
  font-size: 24px;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--text-main);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 12px;
}
.page-faq .faq-item {
  min-width: 0;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: background var(--ease-fast), border-color var(--ease-fast), box-shadow var(--ease-fast);
}
.page-faq .faq-item[open] {
  border-color: rgba(61, 255, 158, 0.42);
  background: var(--bg-hover);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.22);
}
.page-faq .faq-item summary {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 56px;
  padding: 16px 20px;
  font-weight: 600;
  font-size: 15px;
  line-height: 1.45;
  color: var(--text-main);
  list-style: none;
  cursor: pointer;
  user-select: none;
  transition: color var(--ease-fast);
}
.page-faq .faq-item summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item summary:hover {
  color: var(--accent-green);
}
.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--accent-green);
  outline-offset: -2px;
  border-radius: var(--radius-md);
}
.page-faq .faq-item summary::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 50%;
  flex-shrink: 0;
  background: var(--accent-green);
  box-shadow: 0 0 0 4px var(--faq-green-soft);
  transition: background var(--ease-fast), box-shadow var(--ease-fast);
}
.page-faq .faq-item[open] summary::before {
  background: var(--accent-orange);
  box-shadow: 0 0 0 4px var(--faq-orange-soft);
}
.page-faq .faq-item summary::after {
  content: "+";
  margin-left: auto;
  flex-shrink: 0;
  font-family: var(--mono-font);
  font-size: 22px;
  font-weight: 400;
  line-height: 1;
  color: var(--accent-green);
  transition: transform var(--ease-fast), color var(--ease-fast);
}
.page-faq .faq-item[open] summary::after {
  transform: rotate(45deg);
  color: var(--accent-orange);
}
.page-faq .faq-item .faq-body {
  display: grid;
  grid-template-rows: 0fr;
  min-height: 0;
  transition: grid-template-rows 0.34s var(--ease);
}
.page-faq .faq-item[open] > .faq-body {
  grid-template-rows: 1fr;
}
.page-faq .faq-body-inner {
  min-height: 0;
  overflow: hidden;
  padding: 0 20px 20px 43px;
  color: var(--text-sub);
  font-size: 15px;
  line-height: 1.75;
  overflow-wrap: break-word;
}
.page-faq .faq-body-inner p {
  margin: 0;
}
.page-faq .faq-body-inner p + p {
  margin-top: 10px;
}
.page-faq .faq-body-inner .mono {
  color: var(--accent-green);
}
.page-faq .faq-item-more {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 14px;
}
.page-faq .faq-link-more {
  color: var(--accent-green);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 255, 158, 0.35);
  transition: border-color var(--ease-fast);
}
.page-faq .faq-link-more:hover {
  border-bottom-color: var(--accent-green);
}

/* ---------- 数据覆盖配图 ---------- */
.page-faq .faq-figure {
  position: relative;
  margin: 22px 0 4px;
  background: var(--grid-deep);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-faq .faq-figure-tag {
  position: absolute;
  z-index: 3;
  left: 14px;
  bottom: 14px;
  white-space: nowrap;
  padding: 6px 10px;
  border-radius: var(--radius-pill);
  background: rgba(10, 25, 47, 0.88);
  border: 1px solid rgba(255, 107, 53, 0.55);
  color: var(--accent-orange);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  backdrop-filter: blur(4px);
}
.page-faq .faq-caption {
  display: block;
  padding: 12px 16px;
  background: var(--bg-card);
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.6;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 992px) {
  .page-faq .faq-hero {
    padding: 44px 0 64px;
  }
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    gap: 52px;
  }
  .page-faq .faq-hero-desc {
    font-size: 17px;
  }
  .page-faq .faq-hero-flag {
    bottom: 20px;
    left: 20px;
  }
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: var(--faq-gap);
    padding-bottom: 88px;
  }
  .page-faq .faq-index {
    position: sticky;
    top: 28px;
  }
  .page-faq .faq-index-list {
    display: grid;
    gap: 6px;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-faq .faq-index-item {
    white-space: normal;
  }
  .page-faq .faq-index-link {
    padding: 12px 16px;
    border-radius: var(--radius-md);
  }
  .page-faq .faq-section {
    padding: 36px 0 8px;
  }
  .page-faq .faq-section-titles h2 {
    font-size: 28px;
  }
  .page-faq .faq-figure {
    margin-top: 26px;
    max-width: 92%;
    margin-left: auto;
  }
}