.page-faq {
  --faq-nav-width: 280px;
  --faq-gap: 2rem;
  --faq-card-radius: 12px;
  --faq-gold-dim: #D4A017;
  --faq-accent-dim: #FF6B35;
  --faq-bg-card: #1A2B4C;
  --faq-bg-surface: rgba(255,255,255,0.04);
  --faq-text-dim: #A0A8B4;
  --faq-step-size: 2rem;

  background-color: #0B0D17;
  color: #FFFFFF;
  font-family: var(--font-body, 'Merriweather', 'Noto Serif SC', serif);
  line-height: 1.6;
  min-height: 100vh;
  padding-bottom: 4rem;
}

/* ========= 面包屑 ========= */
.page-faq .breadcrumb {
  margin-bottom: 1rem;
}
.page-faq .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  padding: 0;
  margin: 0;
}
.page-faq .breadcrumb__item {
  font-size: var(--fs-small, 0.85rem);
  color: var(--faq-text-dim);
}
.page-faq .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--faq-text-dim);
  opacity: 0.5;
}
.page-faq .breadcrumb__link {
  color: var(--faq-accent-dim);
  text-decoration: none;
  transition: opacity 0.2s;
}
.page-faq .breadcrumb__link:hover {
  opacity: 0.8;
  text-decoration: underline;
}

/* ========= Hero 区域 ========= */
.page-faq .faq-hero {
  padding: 2rem 1.5rem 0;
  max-width: var(--container-max, 1200px);
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
}
.page-faq .faq-hero__container {
  border-bottom: 2px solid var(--faq-accent-dim, #FF6B35);
  padding-bottom: 1.5rem;
  margin-bottom: 1rem;
}
.page-faq .faq-hero__title {
  font-family: var(--font-heading, 'Arial Black', 'Impact', sans-serif);
  font-size: var(--fs-h2, clamp(2rem, 4vw, 4rem));
  font-weight: 900;
  letter-spacing: -0.5px;
  margin: 0 0 0.5rem;
  color: #FFFFFF;
  line-height: 1.15;
}
.page-faq .faq-hero__summary {
  font-size: var(--fs-body, clamp(1rem, 1.4vw, 1.2rem));
  color: var(--faq-text-dim);
  max-width: 640px;
  margin: 0;
}

/* ========= 主布局 ========= */
.page-faq .faq-layout {
  display: flex;
  flex-direction: column;
  gap: var(--faq-gap);
  max-width: var(--container-max, 1200px);
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
  box-sizing: border-box;
}

/* ========= 左侧导航 ========= */
.page-faq .faq-nav {
  background: var(--faq-bg-card);
  border-radius: var(--faq-card-radius);
  padding: 1.5rem;
  position: sticky;
  top: calc(var(--header-height, 72px) + 1rem);
  flex-shrink: 0;
  height: fit-content;
  border-left: 4px solid var(--faq-gold-dim);
}
.page-faq .faq-nav__heading {
  font-family: var(--font-heading, 'Arial Black', 'Impact', sans-serif);
  font-size: calc(var(--fs-body, 1rem) * 1.2);
  font-weight: 900;
  margin: 0 0 1.25rem;
  color: var(--faq-gold-dim);
  letter-spacing: 0.5px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.page-faq .faq-nav__heading::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 1.2em;
  background: var(--faq-gold-dim);
  border-radius: 2px;
}
.page-faq .faq-nav__list {
  list-style: none;
  padding: 0;
  margin: 0 0 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.page-faq .faq-nav__item {
  margin: 0;
}
.page-faq .faq-nav__link {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  color: #FFFFFF;
  text-decoration: none;
  font-size: var(--fs-small, 0.85rem);
  line-height: 1.4;
  transition: background 0.2s, color 0.2s;
}
.page-faq .faq-nav__link:hover {
  background: rgba(255,255,255,0.08);
  color: var(--faq-accent-dim);
}
.page-faq .faq-nav__num {
  font-family: var(--font-data, 'Source Code Pro', 'Courier New', monospace);
  color: var(--faq-gold-dim);
  font-weight: 700;
  font-size: 0.8rem;
  flex-shrink: 0;
  min-width: 1.8em;
}
.page-faq .faq-nav__cta {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 1.25rem;
  margin-top: 0.5rem;
}
.page-faq .faq-nav__cta-text {
  font-size: var(--fs-small, 0.85rem);
  color: var(--faq-text-dim);
  margin: 0 0 0.75rem;
}
.page-faq .faq-nav__cta .btn--primary {
  display: block;
  text-align: center;
}

/* ========= 右侧内容 ========= */
.page-faq .faq-content {
  flex: 1;
  min-width: 0;
}

/* ========= 手风琴卡片 ========= */
.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.page-faq .faq-card {
  background: var(--faq-bg-card);
  border-radius: var(--faq-card-radius);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.06);
  transition: border-color 0.3s;
}
.page-faq .faq-card[open] {
  border-color: rgba(212, 160, 23, 0.4);
}
.page-faq .faq-card__header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: background 0.2s;
}
.page-faq .faq-card__header::-webkit-details-marker {
  display: none;
}
.page-faq .faq-card__header:hover {
  background: rgba(255,255,255,0.04);
}
.page-faq .faq-card__icon {
  color: var(--faq-gold-dim);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.2rem;
  height: 2.2rem;
}
.page-faq .faq-card__icon svg {
  width: 100%;
  height: 100%;
}
.page-faq .faq-card__question {
  font-family: var(--font-heading, 'Arial Black', 'Impact', sans-serif);
  font-size: calc(var(--fs-body, 1rem) * 1.05);
  font-weight: 700;
  color: #FFFFFF;
  flex: 1;
  line-height: 1.3;
}
.page-faq .faq-card__indicator {
  color: var(--faq-accent-dim);
  flex-shrink: 0;
  transition: transform 0.3s ease;
}
.page-faq .faq-card[open] .faq-card__indicator {
  transform: rotate(180deg);
}
.page-faq .faq-card__answer {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: 0 1.5rem 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.page-faq .faq-card__text {
  flex: 1;
}
.page-faq .faq-card__text p {
  margin: 0 0 1rem;
  color: #E0E4EA;
  font-size: var(--fs-body, 1rem);
}
.page-faq .faq-card__text p:last-child {
  margin-bottom: 0;
}
.page-faq .faq-card__link {
  color: var(--faq-accent-dim);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: opacity 0.2s;
}
.page-faq .faq-card__link:hover {
  opacity: 0.8;
}

/* ========= 步骤列表 ========= */
.page-faq .faq-card__steps {
  list-style: none;
  padding: 0;
  margin: 1.25rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.page-faq .faq-card__steps li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: var(--fs-body, 1rem);
  color: #E0E4EA;
  line-height: 1.5;
}
.page-faq .step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--faq-step-size);
  height: var(--faq-step-size);
  border-radius: 50%;
  background: var(--faq-gold-dim);
  color: #0B0D17;
  font-family: var(--font-data, 'Source Code Pro', 'Courier New', monospace);
  font-weight: 900;
  font-size: 0.85rem;
  flex-shrink: 0;
  margin-top: 0.1em;
}
.page-faq .faq-card__tip {
  font-size: var(--fs-small, 0.85rem);
  color: var(--faq-gold-dim);
  background: rgba(212, 160, 23, 0.1);
  padding: 0.6rem 1rem;
  border-radius: 8px;
  border-left: 3px solid var(--faq-gold-dim);
}

/* ========= 卡片内图片 ========= */
.page-faq .faq-card__figure {
  margin: 0;
  flex-shrink: 0;
  width: 100%;
  max-width: 300px;
  border-radius: 8px;
  overflow: hidden;
  background: rgba(0,0,0,0.3);
}
.page-faq .faq-card__figure--wide {
  max-width: 100%;
}
.page-faq .faq-card__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: attr(width) / attr(height);
}
.page-faq .faq-card__figcap {
  font-size: 0.75rem;
  color: var(--faq-text-dim);
  padding: 0.4rem 0.75rem;
  text-align: center;
  font-style: italic;
}

/* ========= CTA 区域 ========= */
.page-faq .faq-cta {
  margin-top: 3rem;
  background: linear-gradient(135deg, #1A2B4C 0%, #0B0D17 100%);
  border-radius: var(--faq-card-radius);
  padding: 2rem 1.5rem;
  border: 1px solid rgba(255,107,53,0.25);
  position: relative;
  overflow: hidden;
}
.page-faq .faq-cta::before {
  content: "?";
  position: absolute;
  right: -1rem;
  bottom: -2rem;
  font-family: var(--font-heading, 'Arial Black', 'Impact', sans-serif);
  font-size: clamp(8rem, 20vw, 16rem);
  font-weight: 900;
  color: rgba(212, 160, 23, 0.08);
  line-height: 1;
  pointer-events: none;
}
.page-faq .faq-cta__content {
  position: relative;
  z-index: 1;
}
.page-faq .faq-cta__title {
  font-family: var(--font-heading, 'Arial Black', 'Impact', sans-serif);
  font-size: calc(var(--fs-h2, 2rem) * 0.75);
  font-weight: 900;
  margin: 0 0 0.5rem;
  color: #FFFFFF;
}
.page-faq .faq-cta__text {
  color: var(--faq-text-dim);
  font-size: var(--fs-body, 1rem);
  margin: 0 0 1.25rem;
  max-width: 480px;
}
.page-faq .faq-cta__text strong {
  color: var(--faq-accent-dim);
}
.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 1rem;
}
.page-faq .btn--primary {
  background: var(--faq-accent-dim);
  color: #0B0D17;
  border: none;
  padding: 0.7rem 1.5rem;
  border-radius: 8px;
  font-family: var(--font-heading, 'Arial Black', 'Impact', sans-serif);
  font-weight: 700;
  font-size: var(--fs-small, 0.85rem);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: opacity 0.2s, transform 0.2s;
  cursor: pointer;
}
.page-faq .btn--primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}
.page-faq .btn--copy {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.2);
  color: #FFFFFF;
  padding: 0.7rem 1.25rem;
  border-radius: 8px;
  font-size: var(--fs-small, 0.85rem);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}
.page-faq .btn--copy:hover {
  border-color: var(--faq-gold-dim);
  background: rgba(212, 160, 23, 0.1);
}
.page-faq .btn__text {
  font-family: var(--font-body, 'Merriweather', 'Noto Serif SC', serif);
}
.page-faq .faq-cta__email {
  font-family: var(--font-data, 'Source Code Pro', 'Courier New', monospace);
  font-size: var(--fs-small, 0.85rem);
  color: var(--faq-gold-dim);
  margin: 0;
  opacity: 0.8;
}

/* ========= 返回顶部 ========= */
.page-faq .scroll-top {
  position: fixed;
  bottom: 2rem;
  right: 1.5rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--faq-accent-dim);
  color: #0B0D17;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s, transform 0.2s;
  z-index: 999;
  box-shadow: 0 4px 16px rgba(255,107,53,0.3);
}
.page-faq .scroll-top[data-visible] {
  opacity: 1;
  visibility: visible;
}
.page-faq .scroll-top:hover {
  transform: scale(1.08);
}

/* ========= 响应式：桌面端 >= 768px ========= */
@media (min-width: 768px) {
  .page-faq .faq-hero {
    padding: 3rem 2rem 0;
  }
  .page-faq .faq-layout {
    flex-direction: row;
    align-items: flex-start;
    padding: 0 2rem;
  }
  .page-faq .faq-nav {
    width: var(--faq-nav-width);
    position: sticky;
    top: calc(var(--header-height, 72px) + 1.5rem);
  }
  .page-faq .faq-content {
    width: calc(100% - var(--faq-nav-width) - var(--faq-gap));
  }
  .page-faq .faq-card__answer {
    flex-direction: row;
    align-items: flex-start;
  }
  .page-faq .faq-card__figure {
    max-width: 220px;
    margin-left: 1rem;
  }
  .page-faq .faq-card__figure--wide {
    max-width: 100%;
    margin-left: 0;
    margin-top: 0.5rem;
  }
  .page-faq .faq-cta {
    padding: 2.5rem 2.5rem;
  }
  .page-faq .faq-cta__title {
    font-size: calc(var(--fs-h2, 2rem) * 0.85);
  }
  .page-faq .scroll-top {
    bottom: 2.5rem;
    right: 2.5rem;
  }
}

/* ========= 桌面端宽屏 >= 1024px ========= */
@media (min-width: 1024px) {
  .page-faq .faq-nav {
    --faq-nav-width: 300px;
    padding: 2rem;
  }
  .page-faq .faq-card__figure {
    max-width: 260px;
  }
  .page-faq .faq-card__figure--wide {
    max-width: 100%;
  }
  .page-faq .faq-cta {
    padding: 3rem 3rem;
  }
}

/* ========= 小屏适配 ========= */
@media (max-width: 480px) {
  .page-faq .faq-hero__title {
    font-size: var(--fs-h1, 2rem);
  }
  .page-faq .faq-card__header {
    padding: 1rem 1rem;
  }
  .page-faq .faq-card__question {
    font-size: var(--fs-body, 0.95rem);
  }
  .page-faq .faq-card__answer {
    padding: 0 1rem 1rem;
  }
  .page-faq .faq-cta {
    padding: 1.5rem 1.25rem;
  }
  .page-faq .faq-cta__actions {
    flex-direction: column;
    align-items: stretch;
  }
  .page-faq .btn--primary,
  .page-faq .btn--copy {
    justify-content: center;
  }
  .page-faq .faq-card__figure {
    max-width: 100%;
  }
  .page-faq .scroll-top {
    bottom: 1rem;
    right: 1rem;
    width: 40px;
    height: 40px;
  }
}
</main>