.page-faq {
  --faq-bg: var(--color-light, #F1FAEE);
  --faq-accent: var(--color-red, #E63946);
  --faq-dark: var(--color-blue, #1D3557);
  --faq-gold: var(--color-gold, #F4A261);
  --faq-text: var(--color-dark, #2B2D42);

  max-width: var(--content-max, 1280px);
  margin: 0 auto;
  padding: calc(var(--header-h, 56px) + 1.5rem) 1rem 2rem;
  font-family: 'Inter', sans-serif;
  color: var(--faq-text);
  background: var(--faq-bg);
  min-height: 100vh;
}

/* 页面上下文提示 */
.page-faq .page-context {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--faq-gold);
  margin-bottom: 0.25rem;
  border-left: 3px solid var(--faq-gold);
  padding-left: 0.5rem;
}

/* 标题区 */
.page-faq .faq-intro {
  margin-bottom: 2rem;
}
.page-faq .faq-title {
  font-size: 2rem;
  font-weight: 700;
  font-style: italic;
  color: var(--faq-dark);
  margin: 0 0 0.25rem;
  line-height: 1.15;
}
.page-faq .faq-desc {
  font-size: 1rem;
  color: var(--faq-text);
  opacity: 0.75;
  margin: 0;
  max-width: 42em;
}

/* 左右布局 */
.page-faq .faq-layout {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* 左侧索引 */
.page-faq .faq-index {
  background: var(--faq-dark);
  color: #fff;
  padding: 1.25rem;
  border-radius: var(--radius-md, 8px);
}
.page-faq .index-heading {
  font-size: 1.125rem;
  font-weight: 700;
  font-style: italic;
  margin: 0 0 0.75rem;
  color: var(--faq-gold);
}
.page-faq .index-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
}
.page-faq .index-link {
  color: #fff;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.2em 0;
  position: relative;
  transition: color var(--transition, 0.28s cubic-bezier(0.22,1,0.36,1));
}
.page-faq .index-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--faq-gold);
  transition: width var(--transition);
}
.page-faq .index-link:hover,
.page-faq .index-link:focus-visible {
  color: var(--faq-gold);
  outline: none;
}
.page-faq .index-link:hover::after,
.page-faq .index-link:focus-visible::after {
  width: 100%;
}

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

/* 章节 */
.page-faq .faq-section {
  margin-bottom: 2rem;
}
.page-faq .section-heading {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.75rem;
  font-size: 1.5rem;
  font-weight: 700;
  font-style: italic;
  color: var(--faq-dark);
}
.page-faq .section-number {
  font-family: var(--font-number, 'JetBrains Mono', monospace);
  font-size: 2.5rem;
  font-weight: 700;
  font-style: normal;
  color: var(--faq-accent);
  line-height: 1;
  margin-right: 0.125rem;
}
.page-faq .section-title {
  flex: 1;
}
.page-faq .section-icon {
  width: 40px;
  height: 40px;
  object-fit: contain;
  border-radius: var(--radius-sm, 4px);
  flex-shrink: 0;
}

/* 问答卡片 */
.page-faq .faq-card {
  background: #fff;
  border-radius: var(--radius-md, 8px);
  box-shadow: var(--shadow-card, 0 4px 20px rgba(0,0,0,0.06));
  overflow: hidden;
  border: 1px solid rgba(0,0,0,0.04);
}

/* 单个问答项 details */
.page-faq .faq-item {
  border-bottom: 1px solid rgba(43,45,66,0.08);
}
.page-faq .faq-item:last-child {
  border-bottom: none;
}

.page-faq .faq-question {
  display: flex;
  align-items: center;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--faq-dark);
  padding: 1rem 1.25rem;
  cursor: pointer;
  user-select: none;
  list-style: none;
  position: relative;
  transition: background var(--transition);
  gap: 0.5rem;
}
.page-faq .faq-question::marker,
.page-faq .faq-question::-webkit-details-marker {
  display: none;
}
.page-faq .faq-question::before {
  content: '▶';
  display: inline-block;
  color: var(--faq-accent);
  font-size: 0.75rem;
  transition: transform var(--transition);
  flex-shrink: 0;
}
.page-faq .faq-item[open] > .faq-question::before {
  transform: rotate(90deg);
}
.page-faq .faq-question:hover,
.page-faq .faq-question:focus-visible {
  background: rgba(230,57,70,0.03);
  outline: none;
}
.page-faq .faq-question:focus-visible {
  box-shadow: inset 0 0 0 2px var(--faq-accent);
}

.page-faq .faq-answer {
  padding: 0 1.25rem 1.25rem;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--faq-text);
  max-width: 48em;
}
.page-faq .faq-answer p {
  margin: 0.5em 0;
}

/* 图片 */
.page-faq .faq-image-block {
  margin-top: 0.75rem;
}
.page-faq .faq-demo-img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm, 4px);
  object-fit: cover;
  border: 1px solid rgba(0,0,0,0.06);
}

/* 联系方式 */
.page-faq .contact-block {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0.5em 0;
  padding: 0.5rem 0.75rem;
  background: var(--faq-bg);
  border-radius: var(--radius-sm, 4px);
}
.page-faq .contact-label {
  font-weight: 600;
  color: var(--faq-dark);
  font-size: 0.925rem;
}
.page-faq .contact-email {
  font-family: var(--font-number, 'JetBrains Mono', monospace);
  font-size: 0.9rem;
  color: var(--faq-accent);
  background: rgba(230,57,70,0.06);
  padding: 0.15em 0.4em;
  border-radius: 3px;
  word-break: break-all;
}
.page-faq .contact-phone {
  font-family: var(--font-number, 'JetBrains Mono', monospace);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--faq-dark);
}
.page-faq .contact-note {
  font-size: 0.825rem;
  color: var(--faq-text);
  opacity: 0.6;
  margin-top: 0.25rem !important;
}

/* 复制按钮 */
.page-faq .btn-copy {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  appearance: none;
  border: 1px solid var(--faq-accent);
  background: transparent;
  color: var(--faq-accent);
  font-size: 0.8rem;
  font-weight: 600;
  font-family: 'Inter', sans-serif;
  border-radius: var(--radius-sm, 4px);
  padding: 0.25rem 0.75rem;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  min-width: 3em;
}
.page-faq .btn-copy:hover {
  background: var(--faq-accent);
  color: #fff;
}
.page-faq .btn-copy:focus-visible {
  outline: 2px solid var(--faq-accent);
  outline-offset: 2px;
}

/* 底部导航链接 */
.page-faq .faq-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(43,45,66,0.1);
}
.page-faq .faq-links .btn {
  font-size: 0.95rem;
  padding: 0.5rem 1.25rem;
  text-decoration: none;
  border-radius: var(--radius-sm, 4px);
  font-weight: 600;
  transition: background var(--transition), color var(--transition);
}
.page-faq .faq-links .btn-ghost {
  border: 1px solid var(--faq-dark);
  color: var(--faq-dark);
  background: transparent;
}
.page-faq .faq-links .btn-ghost:hover {
  background: var(--faq-dark);
  color: #fff;
}
.page-faq .faq-links .btn-primary {
  background: var(--faq-accent);
  color: #fff;
  border: 1px solid var(--faq-accent);
}
.page-faq .faq-links .btn-primary:hover {
  background: #d42d3b;
}

/* ========== 桌面端 >= 768px ========== */
@media (min-width: 768px) {
  .page-faq {
    padding-top: calc(var(--header-h, 56px) + 2.5rem);
    padding-left: 2rem;
    padding-right: 2rem;
  }

  .page-faq .faq-title {
    font-size: 2.75rem;
  }

  .page-faq .faq-layout {
    flex-direction: row;
    gap: 2rem;
    align-items: flex-start;
  }

  .page-faq .faq-index {
    flex: 0 0 240px;
    position: sticky;
    top: calc(var(--header-h, 56px) + 2rem);
    padding: 1.5rem 1.25rem;
  }
  .page-faq .index-list {
    flex-direction: column;
    gap: 0.125rem;
  }
  .page-faq .index-link {
    display: block;
    padding: 0.35rem 0;
    font-size: 1rem;
  }

  .page-faq .faq-content {
    flex: 1;
    min-width: 0;
  }
}

/* ========== 大桌面端 >= 1024px ========== */
@media (min-width: 1024px) {
  .page-faq .faq-index {
    flex-basis: 280px;
  }

  .page-faq .section-number {
    font-size: 3rem;
  }
}

/* ========== 超小屏保护 ========== */
@media (max-width: 360px) {
  .page-faq {
    padding-left: 0.75rem;
    padding-right: 0.75rem;
  }
  .page-faq .faq-title {
    font-size: 1.5rem;
  }
  .page-faq .section-heading {
    font-size: 1.2rem;
    flex-wrap: wrap;
  }
  .page-faq .section-number {
    font-size: 1.8rem;
  }
  .page-faq .faq-question {
    font-size: 0.95rem;
    padding: 0.75rem 1rem;
  }
  .page-faq .faq-answer {
    padding: 0 1rem 1rem;
  }
}