.page-faq {
  --faq-gap: 24px;
  --faq-radius: 6px;
  background: var(--deep-navy);
}

/* ========== Hero 区域 ========== */
.page-faq .faq-hero {
  position: relative;
  padding: 32px 0 32px;
  background:
    radial-gradient(circle at 85% 20%, rgba(200, 255, 0, 0.08), transparent 32%),
    linear-gradient(135deg, rgba(0, 229, 255, 0.06), transparent 60%),
    var(--deep-navy);
  border-bottom: 1px solid rgba(0, 229, 255, 0.18);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 220px;
  height: 220px;
  background: linear-gradient(135deg, transparent 60%, rgba(0, 229, 255, 0.12));
  clip-path: polygon(0 0, 100% 0, 100% 100%);
  pointer-events: none;
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 20px;
}

.page-faq .faq-hero-kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--electric-blue);
  border: 1px solid rgba(0, 229, 255, 0.4);
  padding: 6px 12px;
  margin: 0 0 18px;
}

.page-faq .faq-hero h1 {
  font-size: 27px;
  line-height: 1.3;
  color: var(--white);
  margin: 0 0 16px;
  font-weight: 900;
}

.page-faq .faq-hero-sub {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted-slate);
  max-width: 560px;
  margin: 0 0 22px;
}

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

.page-faq .stat-unit {
  background: rgba(5, 10, 21, 0.6);
  border-left: 2px solid var(--fluo-green);
  padding: 10px 14px;
  flex: 1 1 auto;
  min-width: 90px;
}

.page-faq .stat-unit .stat {
  display: block;
  font-family: var(--font-mono);
  font-size: 23px;
  font-weight: 700;
  color: var(--fluo-green);
  line-height: 1.2;
}

.page-faq .stat-unit .stat-label {
  display: block;
  font-size: 12px;
  color: var(--muted-slate);
  margin-top: 4px;
}

.page-faq .faq-hero-media {
  position: relative;
  border-radius: var(--faq-radius);
  overflow: hidden;
  border: 1px solid rgba(0, 229, 255, 0.2);
  clip-path: polygon(0 0, 100% 0, 100% 88%, 88% 100%, 0 100%);
}

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

/* ========== 主体两栏 ========== */
.page-faq .faq-body {
  display: grid;
  gap: 28px;
  padding: 36px 0 60px;
}

/* 索引 */
.page-faq .faq-index {
  position: relative;
}

.page-faq .faq-index-title {
  font-size: 15px;
  color: var(--white);
  margin: 0 0 14px;
  padding-left: 12px;
  border-left: 3px solid var(--fluo-green);
  font-weight: 700;
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-index-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: rgba(5, 10, 21, 0.6);
  border: 1px solid rgba(122, 139, 168, 0.18);
  border-radius: var(--faq-radius);
  color: var(--white);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: border-color 0.2s, background 0.2s, transform 0.2s;
}

.page-faq .faq-index-link:hover {
  border-color: var(--electric-blue);
  background: rgba(0, 229, 255, 0.08);
  transform: translateX(4px);
}

.page-faq .faq-index-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  padding: 3px 6px;
  border-radius: 2px;
}

.page-faq .faq-index-list li:nth-child(1) .faq-index-num {
  color: var(--purple);
  background: rgba(179, 136, 255, 0.12);
}

.page-faq .faq-index-list li:nth-child(2) .faq-index-num {
  color: var(--electric-blue);
  background: rgba(0, 229, 255, 0.12);
}

.page-faq .faq-index-list li:nth-child(3) .faq-index-num {
  color: var(--fluo-green);
  background: rgba(200, 255, 0, 0.12);
}

.page-faq .faq-index-list li:nth-child(4) .faq-index-num {
  color: var(--amber);
  background: rgba(255, 179, 0, 0.12);
}

.page-faq .faq-index-note {
  margin-top: 18px;
  padding: 16px;
  background: linear-gradient(135deg, rgba(179, 136, 255, 0.1), rgba(0, 229, 255, 0.05));
  border: 1px dashed rgba(179, 136, 255, 0.3);
  border-radius: var(--faq-radius);
}

.page-faq .faq-index-note p {
  margin: 0 0 12px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--white);
}

/* 面板 */
.page-faq .faq-panel {
  display: grid;
  gap: 34px;
}

/* 分组 */
.page-faq .faq-group {
  position: relative;
}

.page-faq .faq-group-head {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(122, 139, 168, 0.2);
}

.page-faq .faq-group-num {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  line-height: 1;
  color: rgba(0, 229, 255, 0.25);
  flex-shrink: 0;
}

.page-faq .faq-group-head-text {
  display: grid;
  gap: 6px;
}

.page-faq .faq-group-head-text .tag {
  justify-self: start;
}

.page-faq .faq-group-title {
  font-size: 19px;
  font-weight: 700;
  color: var(--white);
  margin: 0;
  line-height: 1.3;
}

/* 手风琴项目 */
.page-faq .faq-item {
  background: rgba(5, 10, 21, 0.5);
  border: 1px solid rgba(122, 139, 168, 0.16);
  border-radius: var(--faq-radius);
  margin-bottom: 10px;
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.page-faq .faq-item[open] {
  border-color: rgba(0, 229, 255, 0.35);
}

.page-faq .faq-q {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  user-select: none;
}

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

.page-faq .faq-q-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--fluo-green);
  background: rgba(200, 255, 0, 0.08);
  padding: 3px 6px;
  border-radius: 2px;
  flex-shrink: 0;
}

.page-faq .faq-q-text {
  flex: 1;
  font-size: 14px;
  font-weight: 600;
  color: var(--white);
  line-height: 1.5;
}

.page-faq .faq-q-icon {
  position: relative;
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.page-faq .faq-q-icon::before,
.page-faq .faq-q-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 12px;
  height: 2px;
  background: var(--electric-blue);
  transition: transform 0.25s ease;
}

.page-faq .faq-q-icon::before {
  transform: translate(-50%, -50%);
}

.page-faq .faq-q-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.page-faq .faq-item[open] .faq-q-icon::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.page-faq .faq-item[open] .faq-a {
  animation: faq-open-fade 0.25s ease;
}

@keyframes faq-open-fade {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-faq .faq-a {
  padding: 0 16px 16px 44px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted-slate);
}

.page-faq .faq-a p {
  margin: 0 0 10px;
}

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

.page-faq .faq-hl {
  color: var(--fluo-green);
  font-weight: 700;
  background: rgba(200, 255, 0, 0.08);
  padding: 2px 4px;
  border-radius: 2px;
}

.page-faq .faq-hl-blue {
  color: var(--electric-blue);
  font-weight: 700;
  background: rgba(0, 229, 255, 0.08);
  padding: 2px 4px;
  border-radius: 2px;
}

.page-faq .faq-a a {
  color: var(--electric-blue);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.page-faq .faq-figure {
  margin: 14px 0 0;
  border: 1px solid rgba(122, 139, 168, 0.2);
  border-radius: var(--faq-radius);
  overflow: hidden;
}

.page-faq .faq-figure img {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
}

.page-faq .faq-figure figcaption {
  font-size: 12px;
  color: var(--muted-slate);
  padding: 8px 12px;
  background: rgba(0, 229, 255, 0.04);
  border-top: 1px solid rgba(122, 139, 168, 0.12);
}

/* 底部更多引导 */
.page-faq .faq-more {
  margin-top: 8px;
  padding: 22px;
  background: linear-gradient(135deg, rgba(200, 255, 0, 0.09), rgba(0, 229, 255, 0.06));
  border: 1px solid rgba(200, 255, 0, 0.22);
  border-radius: var(--faq-radius);
  display: grid;
  gap: 16px;
}

.page-faq .faq-more-text p {
  margin: 0 0 4px;
  font-size: 17px;
  font-weight: 700;
  color: var(--white);
}

.page-faq .faq-more-text span {
  font-size: 13px;
  color: var(--muted-slate);
  line-height: 1.6;
}

.page-faq .faq-more-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ========== 桌面端适配 ========== */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 52px 0 56px;
  }

  .page-faq .faq-hero h1 {
    font-size: 40px;
    line-height: 1.25;
  }

  .page-faq .faq-hero-sub {
    font-size: 16px;
  }

  .page-faq .faq-hero-grid {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    gap: 40px;
  }

  .page-faq .stat-unit .stat {
    font-size: 30px;
  }

  .page-faq .faq-body {
    grid-template-columns: 260px 1fr;
    gap: 44px;
    padding: 56px 0 80px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 100px;
  }

  .page-faq .faq-group-title {
    font-size: 21px;
  }

  .page-faq .faq-q {
    padding: 16px 20px;
  }

  .page-faq .faq-q-text {
    font-size: 15px;
  }

  .page-faq .faq-a {
    padding: 0 20px 18px 52px;
  }

  .page-faq .faq-more {
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 20px;
    padding: 26px 28px;
  }

  .page-faq .faq-more-actions {
    flex-wrap: nowrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item[open] .faq-a {
    animation: none;
  }

  .page-faq .faq-q-icon::before,
  .page-faq .faq-q-icon::after {
    transition: none;
  }

  .page-faq .faq-index-link {
    transition: none;
  }
}