.page-faq {
  --faq-radius: 4px;
  --faq-transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  background: var(--clr-light);
  min-height: 60vh;
}

/* ===== Hero ===== */
.page-faq .faq-hero {
  background: var(--clr-deep);
  padding: 32px 0 52px;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: 'FAQ';
  position: absolute;
  right: -10px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: clamp(120px, 18vw, 240px);
  font-weight: 700;
  letter-spacing: -0.06em;
  line-height: 1;
  color: rgba(255, 255, 255, 0.035);
  pointer-events: none;
  user-select: none;
}

.page-faq .faq-hero::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-orange) 0%, var(--clr-cyan) 100%);
  opacity: 0.7;
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero .breadcrumb a {
  color: var(--clr-mist);
  text-decoration: none;
}

.page-faq .faq-hero .breadcrumb a:hover {
  color: var(--clr-orange);
}

.page-faq .faq-hero .breadcrumb .breadcrumb-sep {
  color: rgba(255, 255, 255, 0.4);
}

.page-faq .faq-hero .breadcrumb span[aria-current] {
  color: rgba(255, 255, 255, 0.9);
}

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

.page-faq .faq-hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 217, 255, 0.14);
  border: 1px solid var(--clr-cyan);
  color: var(--clr-cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 2px;
  margin-bottom: 18px;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(28px, 5vw, 46px);
  font-weight: 900;
  line-height: 1.25;
  margin: 0;
  color: #fff;
  letter-spacing: 0.01em;
}

.page-faq .faq-hero-desc {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.82);
  max-width: 540px;
  margin: 0;
}

/* ===== 两栏布局 ===== */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding: 28px 0 64px;
}

/* ===== 侧边目录 ===== */
.page-faq .faq-sidebar {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-faq .faq-sidebar-nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-sidebar-nav::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-nav-item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 11px 16px;
  background: #fff;
  border: 1px solid var(--clr-warm);
  border-radius: var(--faq-radius);
  text-decoration: none;
  color: var(--clr-ink);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15px;
  line-height: 1;
  white-space: nowrap;
  position: relative;
  transition: border-color var(--faq-transition), box-shadow var(--faq-transition);
}

.page-faq .faq-nav-item::before {
  content: '';
  position: absolute;
  left: -1px;
  top: -1px;
  bottom: -1px;
  width: 3px;
  background: var(--clr-orange);
  opacity: 0;
  transition: opacity var(--faq-transition);
}

.page-faq .faq-nav-item:hover,
.page-faq .faq-nav-item:focus-visible {
  border-color: var(--clr-mist);
  box-shadow: var(--shadow-sm);
  outline: none;
}

.page-faq .faq-nav-item:hover::before,
.page-faq .faq-nav-item:focus-visible::before {
  opacity: 1;
}

.page-faq .faq-nav-num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--clr-orange);
}

.page-faq .faq-sidebar-help {
  background: var(--clr-deep);
  color: #fff;
  border-radius: var(--faq-radius);
  padding: 24px 20px;
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
}

.page-faq .faq-sidebar-help::after {
  content: '';
  position: absolute;
  right: -24px;
  top: -24px;
  width: 72px;
  height: 72px;
  border: 2px solid var(--clr-cyan);
  border-radius: 50%;
  opacity: 0.25;
  pointer-events: none;
}

.page-faq .faq-sidebar-help-label {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 16px;
  margin: 0 0 8px;
  position: relative;
  z-index: 1;
}

.page-faq .faq-sidebar-help p:not(.faq-sidebar-help-label) {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.6;
  margin: 0 0 18px;
  position: relative;
  z-index: 1;
}

.page-faq .faq-sidebar-help .btn {
  position: relative;
  z-index: 1;
  width: 100%;
}

/* ===== 问答内容区 ===== */
.page-faq .faq-content {
  display: flex;
  flex-direction: column;
  gap: 48px;
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: 96px;
  border-left: 3px solid var(--clr-warm);
  padding-left: 16px;
  transition: border-color var(--faq-transition);
}

.page-faq .faq-group:target {
  border-left-color: var(--clr-orange);
}

.page-faq .faq-group-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.page-faq .faq-group-num {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--clr-orange);
  background: rgba(255, 107, 53, 0.12);
  padding: 4px 9px;
  border-radius: var(--faq-radius);
  line-height: 1;
}

.page-faq .faq-group-head h2 {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 900;
  margin: 0;
  color: var(--clr-deep);
}

.page-faq .faq-group:target .faq-group-head h2 {
  color: var(--clr-orange);
}

.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* ===== 折叠面板 ===== */
.page-faq .faq-item {
  background: #fff;
  border: 1px solid var(--clr-warm);
  border-radius: var(--faq-radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--faq-transition), border-color var(--faq-transition);
}

.page-faq .faq-item[open] {
  box-shadow: var(--shadow-md);
  border-color: var(--clr-mist);
}

.page-faq .faq-q {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 16px;
  cursor: pointer;
  user-select: none;
  transition: background var(--faq-transition);
}

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

.page-faq .faq-q:hover {
  background: var(--clr-light);
}

.page-faq .faq-item[open] > .faq-q {
  background: var(--clr-light);
}

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--clr-orange);
  outline-offset: -2px;
}

.page-faq .faq-q-mark {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--clr-orange);
  border: 1.5px solid var(--clr-orange);
  border-radius: 2px;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  line-height: 1;
}

.page-faq .faq-q-title {
  flex: 1;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 700;
  color: var(--clr-ink);
  line-height: 1.45;
}

.page-faq .faq-toggle {
  position: relative;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  margin-left: auto;
}

.page-faq .faq-toggle::before,
.page-faq .faq-toggle::after {
  content: '';
  position: absolute;
  top: 11px;
  left: 5px;
  width: 14px;
  height: 2px;
  background: var(--clr-deep);
  border-radius: 1px;
  transition: transform 0.3s ease;
}

.page-faq .faq-toggle::after {
  transform: rotate(90deg);
}

.page-faq .faq-item[open] .faq-toggle::before {
  transform: rotate(45deg);
}

.page-faq .faq-item[open] .faq-toggle::after {
  transform: rotate(-45deg);
}

.page-faq .faq-a {
  padding: 0 16px 20px;
  border-top: 1px dashed var(--clr-warm);
  animation: pageFaqFade 0.3s ease;
}

.page-faq .faq-a p {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.8;
  color: var(--clr-ink);
  margin: 14px 0 0;
}

.page-faq .faq-a a {
  color: var(--clr-orange);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(255, 107, 53, 0.4);
  font-weight: 500;
}

.page-faq .faq-a a:hover {
  text-decoration-color: var(--clr-orange);
}

@keyframes pageFaqFade {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== 图片 ===== */
.page-faq .faq-figure {
  margin: 18px 0 0;
  padding: 8px;
  background: var(--clr-light);
  border-radius: var(--faq-radius);
}

.page-faq .faq-figure img {
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: calc(var(--faq-radius) - 1px);
  display: block;
}

.page-faq .faq-figure .img-caption {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--clr-mist);
  padding: 8px 4px 2px;
}

/* ===== 底部联系卡 ===== */
.page-faq .faq-bottom-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: flex-start;
  background: var(--clr-deep);
  color: #fff;
  border-radius: var(--faq-radius);
  padding: 28px 24px;
  position: relative;
  overflow: hidden;
}

.page-faq .faq-bottom-card::after {
  content: '?';
  position: absolute;
  right: 10px;
  bottom: -18px;
  font-family: var(--font-mono);
  font-size: 110px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.05);
  line-height: 1;
  pointer-events: none;
}

.page-faq .faq-bottom-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--clr-cyan);
  margin: 0 0 6px;
  text-transform: uppercase;
}

.page-faq .faq-bottom-card p:not(.faq-bottom-kicker) {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.88);
  max-width: 440px;
}

.page-faq .faq-bottom-card .btn-primary {
  position: relative;
  z-index: 1;
}

/* ===== 桌面端 ===== */
@media (min-width: 992px) {
  .page-faq .faq-hero {
    padding: 48px 0 76px;
  }

  .page-faq .faq-hero .breadcrumb {
    margin-bottom: 40px;
  }

  .page-faq .faq-hero-grid {
    grid-template-columns: 1fr 380px;
    align-items: end;
    gap: 56px;
  }

  .page-faq .faq-hero h1 {
    font-size: clamp(34px, 4.5vw, 50px);
  }

  .page-faq .faq-hero-desc {
    border-left: 2px solid var(--clr-orange);
    padding-left: 22px;
    font-size: 15px;
  }

  .page-faq .faq-layout {
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 64px;
    align-items: start;
    padding: 48px 0 96px;
  }

  .page-faq .faq-sidebar {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-nav-item {
    display: flex;
    padding: 14px 16px;
    border: none;
    border-radius: 0;
    background: transparent;
    border-bottom: 1px solid var(--clr-warm);
    white-space: normal;
    box-shadow: none;
  }

  .page-faq .faq-nav-item::before {
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
  }

  .page-faq .faq-nav-item:hover,
  .page-faq .faq-nav-item:focus-visible {
    background: rgba(255, 107, 53, 0.06);
    border-color: transparent;
    box-shadow: none;
  }

  .page-faq .faq-group {
    padding-left: 24px;
  }

  .page-faq .faq-group-head {
    margin-bottom: 24px;
  }

  .page-faq .faq-group-head h2 {
    font-size: 26px;
  }

  .page-faq .faq-group-num {
    font-size: 22px;
  }

  .page-faq .faq-q {
    padding: 22px 24px;
  }

  .page-faq .faq-a {
    padding: 0 24px 24px;
  }

  .page-faq .faq-q-title {
    font-size: 17px;
  }

  .page-faq .faq-figure {
    padding: 12px;
  }

  .page-faq .faq-bottom-card {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    gap: 32px;
    padding: 36px 40px;
  }

  .page-faq .faq-bottom-card .btn-primary {
    flex-shrink: 0;
  }
}

/* ===== 减少动效偏好 ===== */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-toggle::before,
  .page-faq .faq-toggle::after {
    transition: none;
  }

  .page-faq .faq-a {
    animation: none;
  }

  .page-faq .faq-nav-item,
  .page-faq .faq-item,
  .page-faq .faq-q,
  .page-faq .faq-group {
    transition: none;
  }
}