.page-faq {
  --faq-bg: var(--clr-warm-paper);
  --faq-text: var(--clr-deep-ink);
  --faq-border: var(--clr-dark-border);
  --faq-accent: var(--clr-primary-orange);
  --faq-blue: var(--clr-primary-blue);
  --faq-shadow: var(--shadow-heavy);
  --faq-radius: 0px;
  --faq-spacing: 1.5rem;
  --faq-index-width: 220px;
  --faq-gap: 2rem;

  background: var(--faq-bg);
  color: var(--faq-text);
  font-family: var(--font-body);
  line-height: 1.6;
  padding: 1.5rem 1rem 0;
  max-width: 1280px;
  margin: 0 auto;
  min-height: 100vh;
}

/* 面包屑 */
.page-faq .faq-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  margin-bottom: 1rem;
  color: var(--clr-cool-gray);
}
.page-faq .faq-breadcrumb a {
  color: var(--faq-blue);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color var(--transition-default);
}
.page-faq .faq-breadcrumb a:hover,
.page-faq .faq-breadcrumb a:focus-visible {
  border-color: var(--faq-blue);
}
.page-faq .faq-breadcrumb-sep {
  color: var(--clr-cool-gray);
  font-weight: 700;
}
.page-faq .faq-breadcrumb [aria-current="page"] {
  font-weight: 600;
  color: var(--faq-text);
}

/* 顶部hero */
.page-faq .faq-hero {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: var(--border-thick) solid var(--faq-border);
}
.page-faq .faq-hero-title {
  font-family: var(--font-heading);
  font-weight: var(--heading-weight);
  font-style: italic;
  font-size: 2.2rem;
  margin: 0 0 0.25rem;
  color: var(--faq-text);
  letter-spacing: -0.02em;
}
.page-faq .faq-hero-sub {
  font-size: 1.05rem;
  color: var(--clr-cool-gray);
  margin: 0 0 1.25rem;
}

/* 搜索框 */
.page-faq .faq-search-wrap {
  position: relative;
  max-width: 520px;
  margin-bottom: 1.5rem;
}
.page-faq .faq-search {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.8rem;
  font-size: 1rem;
  font-family: var(--font-body);
  border: var(--border-thick) solid var(--faq-border);
  background: var(--clr-pure-white);
  color: var(--faq-text);
  outline: none;
  transition: border-color var(--transition-default), box-shadow var(--transition-default);
  box-shadow: var(--faq-shadow);
}
.page-faq .faq-search:focus {
  border-color: var(--faq-accent);
  box-shadow: 4px 4px 0 var(--clr-subtle-shadow);
}
.page-faq .faq-search::placeholder {
  color: var(--clr-cool-gray);
  opacity: 0.8;
}
.page-faq .faq-search-icon {
  position: absolute;
  left: 0.8rem;
  top: 50%;
  transform: translateY(-50%);
  width: 1.2rem;
  height: 1.2rem;
  pointer-events: none;
}
.page-faq .faq-search-icon::before {
  content: "";
  display: block;
  width: 100%;
  height: 100%;
  background: var(--faq-text);
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Ccircle cx='10' cy='10' r='6' fill='none' stroke='%23000' stroke-width='2'/%3E%3Cline x1='14.5' y1='14.5' x2='20' y2='20' stroke='%23000' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat center/contain;
  mask-repeat: no-repeat;
  mask-position: center;
  mask-size: contain;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Ccircle cx='10' cy='10' r='6' fill='none' stroke='%23000' stroke-width='2'/%3E%3Cline x1='14.5' y1='14.5' x2='20' y2='20' stroke='%23000' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat center/contain;
}

/* 指南图 */
.page-faq .faq-guide-img {
  width: 100%;
  max-width: 800px;
  border: var(--border-thick) solid var(--faq-border);
  box-shadow: var(--faq-shadow);
  background: var(--clr-light-gray-bg);
  overflow: hidden;
}
.page-faq .faq-guide-visual {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* 主体布局 */
.page-faq .faq-layout {
  display: flex;
  flex-direction: column;
  gap: var(--faq-gap);
  margin-bottom: 2.5rem;
}

/* 分类索引（移动端横向滚动标签） */
.page-faq .faq-index {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--faq-accent) var(--clr-light-gray-bg);
  position: sticky;
  top: 0;
  z-index: 5;
  background: var(--faq-bg);
  padding: 0.5rem 0;
}
.page-faq .faq-index::-webkit-scrollbar {
  height: 4px;
}
.page-faq .faq-index::-webkit-scrollbar-thumb {
  background: var(--faq-accent);
}
.page-faq .faq-index-list {
  display: flex;
  gap: 0.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
  min-width: max-content;
}
.page-faq .faq-index-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--clr-pure-white);
  border: 3px solid var(--faq-border);
  text-decoration: none;
  color: var(--faq-text);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.9rem;
  box-shadow: 4px 4px 0 var(--clr-subtle-shadow);
  transition: transform var(--transition-default), box-shadow var(--transition-default);
  white-space: nowrap;
}
.page-faq .faq-index-item:hover,
.page-faq .faq-index-item:focus-visible {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--clr-subtle-shadow);
  border-color: var(--faq-accent);
}
.page-faq .faq-index-icon {
  width: 30px;
  height: 30px;
  object-fit: contain;
  flex-shrink: 0;
}

/* 问答内容区 */
.page-faq .faq-content {
  flex: 1;
  min-width: 0;
}

/* 每个分类区块 */
.page-faq .faq-section {
  margin-bottom: 2.5rem;
  padding-top: 0.25rem;
}
.page-faq .faq-section-title {
  font-family: var(--font-heading);
  font-weight: var(--heading-weight);
  font-style: italic;
  font-size: 1.6rem;
  margin: 0 0 1rem;
  padding-left: 0.75rem;
  border-left: 6px solid var(--faq-accent);
  color: var(--faq-text);
  letter-spacing: -0.01em;
}

/* 手风琴项 */
.page-faq .faq-item {
  display: block;
  margin-bottom: 0.75rem;
  border: 3px solid var(--faq-border);
  box-shadow: 4px 4px 0 var(--clr-subtle-shadow);
  background: var(--clr-pure-white);
  transition: box-shadow var(--transition-default);
  overflow: hidden;
}
.page-faq .faq-item[open] {
  box-shadow: 6px 6px 0 var(--clr-subtle-shadow);
}
.page-faq .faq-item-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.9rem 1rem 0.9rem 1.25rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  color: var(--faq-text);
  cursor: pointer;
  list-style: none;
  transition: background var(--transition-default);
  position: relative;
}
.page-faq .faq-item-title::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item-title::before {
  content: "";
  flex-shrink: 0;
  width: 1rem;
  height: 1rem;
  background: var(--faq-accent);
  transition: transform var(--transition-default);
}
.page-faq .faq-item[open] .faq-item-title::before {
  transform: rotate(90deg);
}
.page-faq .faq-item-title:hover {
  background: var(--clr-light-gray-bg);
}
.page-faq .faq-item-answer {
  padding: 0 1.5rem 1.2rem 2.75rem;
  font-size: 0.95rem;
  color: var(--clr-cool-gray);
  border-top: 2px solid var(--clr-light-gray-bg);
}
.page-faq .faq-item-answer p {
  margin: 0.75rem 0 0;
}
.page-faq .faq-item-answer a {
  color: var(--faq-blue);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-default);
}
.page-faq .faq-item-answer a:hover {
  color: var(--faq-accent);
}

/* 底部纹理 */
.page-faq .faq-texture {
  width: 100%;
  max-width: 1200px;
  margin: 1.5rem auto 0;
  border-top: var(--border-thick) solid var(--faq-border);
  overflow: hidden;
  opacity: 0.9;
}
.page-faq .faq-texture-img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* 桌面端布局：侧边索引固定 + 右侧内容流 */
@media (min-width: 768px) {
  .page-faq {
    padding: 2rem 2rem 0;
  }
  .page-faq .faq-hero-title {
    font-size: 2.8rem;
  }
  .page-faq .faq-layout {
    flex-direction: row;
    align-items: flex-start;
  }
  .page-faq .faq-index {
    width: var(--faq-index-width);
    flex-shrink: 0;
    position: sticky;
    top: 2rem;
    align-self: flex-start;
    overflow: visible;
    background: transparent;
    padding: 0;
  }
  .page-faq .faq-index-list {
    flex-direction: column;
    gap: 0.6rem;
    min-width: unset;
  }
  .page-faq .faq-index-item {
    white-space: normal;
    font-size: 0.95rem;
    padding: 0.6rem 1rem;
  }
  .page-faq .faq-index-icon {
    width: 40px;
    height: 40px;
  }
  .page-faq .faq-content {
    flex: 1;
    min-width: 0;
    padding-left: 0.5rem;
  }
  .page-faq .faq-section-title {
    font-size: 1.8rem;
  }
  .page-faq .faq-item-title {
    font-size: 1.05rem;
    padding: 1rem 1.25rem 1rem 1.5rem;
  }
  .page-faq .faq-item-answer {
    padding-left: 3rem;
    font-size: 1rem;
  }
}

@media (min-width: 1024px) {
  .page-faq {
    padding: 2.5rem 3rem 0;
  }
  .page-faq .faq-hero-title {
    font-size: 3.2rem;
  }
  .page-faq .faq-index {
    width: 240px;
  }
}