.page-faq {
  --faq-green: var(--accent-green);
  --faq-blue: var(--accent-blue);
  --faq-orange: var(--accent-orange);
  --faq-silver: var(--accent-silver);
  --faq-card-bg: #121A24;
  --faq-line: #243447;
  --faq-ease: cubic-bezier(0.4, 0, 0.2, 1);
  --faq-speed: 0.3s;
  background: var(--bg-deep);
  color: var(--text-main);
  font-family: var(--font-body);
  line-height: 1.7;
  overflow-x: hidden;
}

/* ===== Hero 首屏 ===== */
.page-faq .faq-hero {
  padding: 28px 0 36px;
  position: relative;
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: -80px;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.06) 0%, transparent 70%);
  pointer-events: none;
}
.page-faq .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
  font-size: 13px;
  color: var(--text-weak);
}
.page-faq .breadcrumbs a {
  color: var(--text-weak);
  text-decoration: none;
  transition: color var(--faq-speed) var(--faq-ease);
}
.page-faq .breadcrumbs a:hover {
  color: var(--faq-green);
}
.page-faq .breadcrumb-current {
  color: var(--faq-silver);
}

.page-faq .faq-hero-inner {
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.page-faq .faq-hero-copy {
  position: relative;
  padding-left: 0;
}
.page-faq .faq-hero-copy .chapter-index {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 48px;
  font-weight: 600;
  color: var(--faq-green);
  opacity: 0.3;
  line-height: 1;
  margin-bottom: 8px;
}
.page-faq .faq-hero-text h1 {
  font-size: clamp(28px, 5.2vw, 48px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: 0.01em;
  margin: 12px 0 16px;
  color: var(--text-main);
}
.page-faq .faq-hero-lead {
  color: var(--text-weak);
  font-size: 15px;
  max-width: 680px;
  margin: 0;
}

.page-faq .faq-cat-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}
.page-faq .faq-cat-tab {
  background: var(--bg-card);
  border: 1px solid var(--line);
  color: var(--text-main);
  padding: 9px 18px;
  border-radius: var(--radius-pill);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: border-color var(--faq-speed) var(--faq-ease), color var(--faq-speed) var(--faq-ease), transform var(--faq-speed) var(--faq-ease);
}
.page-faq .faq-cat-tab:hover {
  border-color: var(--faq-green);
  color: var(--faq-green);
  transform: translateY(-2px);
}

.page-faq .faq-hero-figure {
  margin: 0;
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--line);
}
.page-faq .faq-hero-img {
  width: 100%;
  height: auto;
  max-height: 280px;
  object-fit: cover;
  display: block;
}

/* ===== 常见问题内容区 ===== */
.page-faq .faq-content {
  padding: 0 0 48px;
}
.page-faq .faq-grid-layout {
  display: flex;
  flex-direction: column;
  gap: 40px;
}
.page-faq .faq-main {
  min-width: 0;
}

.page-faq .faq-common-title {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 20px;
}
.page-faq .faq-common-title .chapter-index {
  font-family: var(--font-data);
  font-size: 42px;
  font-weight: 600;
  color: var(--faq-green);
  line-height: 1;
  opacity: 0.7;
}
.page-faq .faq-common-title-text h2 {
  font-size: 26px;
  font-weight: 700;
  margin: 0 0 6px;
  color: var(--text-main);
}
.page-faq .faq-common-title .chapter-meta {
  color: var(--text-weak);
  font-size: 13px;
  letter-spacing: 0.03em;
}

/* ===== FAQ 章节 ===== */
.page-faq .faq-chapter {
  margin-bottom: 44px;
}
.page-faq .faq-chapter .chapter-header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 18px;
  border-left: 3px solid var(--faq-green);
  padding-left: 14px;
}
.page-faq .faq-chapter .chapter-index {
  font-family: var(--font-data);
  font-size: 24px;
  font-weight: 600;
  color: var(--faq-blue);
  opacity: 0.75;
  line-height: 1;
}
.page-faq .faq-chapter-title h3 {
  font-size: 20px;
  font-weight: 700;
  margin: 0;
  color: var(--text-main);
}
.page-faq .faq-chapter-title .chapter-meta {
  color: var(--text-weak);
  font-size: 12px;
  letter-spacing: 0.04em;
  margin-left: 6px;
}

/* ===== FAQ 卡片 ===== */
.page-faq .faq-card-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}
.page-faq .faq-card {
  background: var(--faq-card-bg);
  border: 1px solid var(--line);
  padding: 20px 18px;
  transition: border-color var(--faq-speed) var(--faq-ease), background var(--faq-speed) var(--faq-ease), transform var(--faq-speed) var(--faq-ease);
}
.page-faq .faq-card:hover {
  border-color: rgba(0, 229, 255, 0.45);
  background: var(--bg-float);
  transform: translateY(-2px);
}
.page-faq .faq-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}
.page-faq .faq-coord {
  font-family: var(--font-data);
  font-size: 20px;
  font-weight: 600;
  color: var(--faq-green);
  background: rgba(198, 255, 0, 0.08);
  padding: 2px 8px;
  border-radius: var(--radius-xs);
  letter-spacing: 0.05em;
}
.page-faq .faq-tag {
  font-size: 12px;
  color: var(--text-weak);
  border: 1px solid var(--line);
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  letter-spacing: 0.04em;
}
.page-faq .faq-card h4 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-main);
  margin: 0 0 10px;
}

/* ===== details 手风琴 ===== */
.page-faq .faq-details {
  border-top: 1px solid var(--line);
  padding-top: 8px;
}
.page-faq .faq-details summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-weak);
  user-select: none;
  transition: color var(--faq-speed) var(--faq-ease);
}
.page-faq .faq-details summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-details summary::after {
  content: "+";
  font-family: var(--font-data);
  font-size: 22px;
  font-weight: 400;
  color: var(--faq-green);
  line-height: 1;
  transition: transform var(--faq-speed) var(--faq-ease), color var(--faq-speed) var(--faq-ease);
}
.page-faq .faq-details[open] summary::after {
  transform: rotate(45deg);
  color: var(--faq-blue);
}
.page-faq .faq-details summary:hover {
  color: var(--faq-green);
}
.page-faq .faq-details p {
  margin: 12px 0 4px;
  font-size: 14px;
  color: var(--text-main);
  line-height: 1.75;
  padding-right: 8px;
}

/* ===== 侧栏 ===== */
.page-faq .faq-sidebar {
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-width: 0;
}
.page-faq .faq-sidebar-figure {
  margin: 0;
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--line);
}
.page-faq .faq-sidebar-img {
  width: 100%;
  height: auto;
  max-height: 340px;
  object-fit: cover;
  display: block;
}

.page-faq .faq-legend {
  padding: 20px;
  border: 1px solid var(--line);
}
.page-faq .faq-legend h3 {
  font-size: 15px;
  font-weight: 700;
  margin: 0 0 14px;
  color: var(--text-main);
}
.page-faq .faq-legend .legend {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-faq .faq-legend .legend-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-weak);
  line-height: 1.4;
}

.page-faq .faq-anchor-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  padding: 12px;
}
.page-faq .faq-anchor-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 10px;
  border-radius: var(--radius-xs);
  color: var(--text-weak);
  font-size: 13px;
  text-decoration: none;
  transition: background var(--faq-speed) var(--faq-ease), color var(--faq-speed) var(--faq-ease), padding-left var(--faq-speed) var(--faq-ease);
}
.page-faq .faq-anchor-nav a .font-data {
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--faq-green);
  min-width: 24px;
}
.page-faq .faq-anchor-nav a:hover {
  background: var(--bg-float);
  color: var(--text-main);
  padding-left: 14px;
}
.page-faq .faq-sidebar-cta {
  width: 100%;
  justify-content: center;
  text-align: center;
}

/* ===== 联系方式 ===== */
.page-faq .faq-contact {
  padding: 8px 0 56px;
}
.page-faq .faq-contact-inner {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 20px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  padding: 32px 24px 28px;
  overflow: hidden;
}
.page-faq .faq-contact-inner::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 46%;
  height: 4px;
  background: linear-gradient(90deg, transparent, var(--faq-orange));
}
.page-faq .faq-contact-inner::after {
  content: "";
  position: absolute;
  right: -48px;
  bottom: -48px;
  width: 180px;
  height: 180px;
  background: var(--faq-orange);
  opacity: 0.08;
  transform: rotate(45deg);
  pointer-events: none;
}
.page-faq .faq-contact-inner .chapter-index {
  font-family: var(--font-data);
  font-size: 34px;
  font-weight: 600;
  color: var(--faq-orange);
  line-height: 1;
  opacity: 0.8;
}
.page-faq .faq-contact-text h2 {
  font-size: 22px;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--text-main);
}
.page-faq .faq-contact-email {
  font-family: var(--font-data);
  font-size: 15px;
  color: var(--faq-orange);
  margin: 0 0 6px;
  word-break: break-all;
}
.page-faq .faq-contact-note {
  font-size: 14px;
  color: var(--text-weak);
  margin: 0;
}
.page-faq .faq-contact-inner .btn {
  margin-top: 4px;
}

/* ===== 响应式 ===== */
@media (min-width: 768px) {
  .page-faq .faq-card-list {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }
  .page-faq .faq-card {
    padding: 24px 22px;
  }
  .page-faq .faq-card:nth-child(3n) {
    grid-column: 1 / -1;
  }
  .page-faq .faq-hero-img {
    max-height: 340px;
  }
  .page-faq .faq-contact-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 36px 40px;
  }
  .page-faq .faq-contact-inner .chapter-index {
    position: absolute;
    left: 24px;
    top: 20px;
    font-size: 28px;
  }
  .page-faq .faq-contact-text {
    padding-left: 56px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-hero {
    padding: 44px 0 52px;
  }
  .page-faq .faq-hero-inner {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    align-items: end;
    gap: 40px;
  }
  .page-faq .faq-hero-copy {
    padding-left: 64px;
  }
  .page-faq .faq-hero-copy .chapter-index {
    position: absolute;
    left: 0;
    top: 4px;
    font-size: 56px;
  }
  .page-faq .faq-hero-img {
    max-height: 260px;
  }
  .page-faq .faq-grid-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 44px;
    align-items: start;
  }
  .page-faq .faq-sidebar {
    position: sticky;
    top: 110px;
  }
  .page-faq .faq-sidebar-img {
    max-height: none;
    aspect-ratio: 5 / 6;
    object-fit: cover;
  }
  .page-faq .faq-anchor-nav {
    max-height: 420px;
    overflow-y: auto;
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-grid-layout {
    grid-template-columns: minmax(0, 1fr) 360px;
    gap: 52px;
  }
  .page-faq .faq-main .faq-chapter .faq-card-list {
    gap: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-card,
  .page-faq .faq-cat-tab,
  .page-faq .faq-anchor-nav a {
    transition: none;
  }
  .page-faq .faq-card:hover,
  .page-faq .faq-cat-tab:hover,
  .page-faq .faq-anchor-nav a:hover {
    transform: none;
  }
}