.page-faq {
  --faq-bg: #F5F5F5;
  --faq-card-bg: #FFFFFF;
  --faq-border: #E0E0E0;
  --faq-accent: #D32F2F;
  --faq-primary: #1A3A5C;
  --faq-primary-light: #2C5F7A;
  --faq-text: #212121;
  --faq-text-muted: #616161;
  --faq-shadow: 0 2px 8px rgba(0,0,0,0.06);
  --faq-radius: 4px;
  --faq-chapter-num-size: clamp(3rem, 6vw, 5rem);

  position: relative;
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
  padding: var(--spacing-lg, 2rem) var(--spacing-md, 1rem) var(--spacing-2xl, 5rem);
  background-color: var(--faq-bg);
  color: var(--faq-text);
  font-family: var(--font-body, "Noto Sans SC", sans-serif);
  line-height: var(--lh-body, 1.6);
  min-height: 60vh;
}

/* 面包屑 */
.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs, 0.25rem);
  font-size: var(--size-caption, 0.875rem);
  color: var(--faq-text-muted);
  margin-bottom: var(--spacing-lg, 2rem);
  padding-bottom: var(--spacing-sm, 0.5rem);
  border-bottom: 1px solid var(--faq-border);
}
.page-faq .breadcrumb a {
  color: var(--faq-primary);
  text-decoration: none;
  transition: color var(--transition-fast, 200ms ease);
}
.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--faq-accent);
  text-decoration: underline;
}
.page-faq .breadcrumb-sep {
  color: var(--faq-text-muted);
  margin: 0 0.25rem;
}
.page-faq .breadcrumb [aria-current="page"] {
  color: var(--faq-text-muted);
  font-weight: var(--fw-body, 400);
}

/* 首屏标题区 */
.page-faq .faq-hero {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-lg, 2rem);
  margin-bottom: var(--spacing-2xl, 5rem);
  padding: var(--spacing-lg, 2rem) 0;
  border-bottom: 2px solid var(--faq-primary-light);
}
.page-faq .faq-hero-text {
  flex: 1 1 300px;
}
.page-faq .faq-title {
  font-family: var(--font-heading, "Noto Sans SC", sans-serif);
  font-weight: var(--fw-heading, 700);
  font-size: var(--size-heading, clamp(1.8rem, 4vw, 3rem));
  color: var(--faq-primary);
  letter-spacing: var(--ls-heading, 0.02em);
  margin: 0 0 var(--spacing-sm, 0.5rem);
  line-height: 1.25;
  position: relative;
  display: inline-block;
}
.page-faq .faq-title::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 60%;
  height: 3px;
  background: var(--faq-accent);
  clip-path: polygon(0 0, 100% 0, 90% 100%, 0 100%);
}
.page-faq .faq-subtitle {
  font-size: var(--size-body, clamp(1rem, 2vw, 1.2rem));
  color: var(--faq-text-muted);
  margin: var(--spacing-md, 1rem) 0 var(--spacing-lg, 2rem);
  max-width: 560px;
}
.page-faq .faq-hero-image {
  flex: 0 0 120px;
  display: flex;
  justify-content: center;
  align-items: center;
}
.page-faq .faq-hero-image img {
  width: 120px;
  height: 120px;
  object-fit: contain;
  display: block;
  opacity: 0.9;
}

/* 搜索框 */
.page-faq .faq-search-wrap {
  position: relative;
  max-width: 480px;
}
.page-faq .faq-search-input {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.5rem;
  font-family: var(--font-body, "Noto Sans SC", sans-serif);
  font-size: 1rem;
  border: 2px solid var(--faq-border);
  border-radius: var(--faq-radius);
  background: var(--faq-card-bg);
  color: var(--faq-text);
  transition: border-color var(--transition-fast, 200ms ease), box-shadow var(--transition-fast, 200ms ease);
  -webkit-appearance: none;
  appearance: none;
}
.page-faq .faq-search-input:focus {
  outline: none;
  border-color: var(--faq-primary);
  box-shadow: 0 0 0 3px rgba(26,58,92,0.12);
}
.page-faq .faq-search-input::placeholder {
  color: var(--faq-text-muted);
  opacity: 0.7;
}
.page-faq .faq-search-icon {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--faq-text-muted);
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 章节通用 */
.page-faq .faq-chapter {
  margin-bottom: var(--spacing-2xl, 5rem);
  position: relative;
  padding-top: var(--spacing-md, 1rem);
}
.page-faq .faq-chapter-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: var(--spacing-md, 1rem);
  margin-bottom: var(--spacing-lg, 2rem);
  position: relative;
}
.page-faq .faq-chapter-num {
  font-family: var(--font-heading, "Noto Sans SC", sans-serif);
  font-weight: var(--fw-heading, 700);
  font-size: var(--faq-chapter-num-size);
  line-height: 1;
  color: var(--faq-primary);
  opacity: 0.12;
  flex: 0 0 auto;
  letter-spacing: -0.03em;
  position: relative;
}
.page-faq .faq-chapter-num::after {
  content: '';
  position: absolute;
  bottom: 0.25em;
  right: -0.3em;
  width: 0.4em;
  height: 0.4em;
  background: var(--faq-accent);
  clip-path: polygon(0 0, 100% 100%, 0 100%);
  opacity: 0.7;
}
.page-faq .faq-chapter-title {
  font-family: var(--font-heading, "Noto Sans SC", sans-serif);
  font-weight: var(--fw-heading, 700);
  font-size: clamp(1.5rem, 3.5vw, 2.2rem);
  color: var(--faq-primary);
  margin: 0;
  line-height: 1.2;
  flex: 1 1 auto;
  padding-top: 0.15em;
}
.page-faq .faq-chapter-img {
  width: 250px;
  height: 200px;
  object-fit: cover;
  border-radius: var(--faq-radius);
  box-shadow: var(--faq-shadow);
  clip-path: polygon(0 0, 100% 0, 95% 100%, 5% 100%);
  flex: 0 0 auto;
  margin-left: auto;
  display: none; /* 移动端隐藏，桌面显示 */
}

/* 手风琴 */
.page-faq .faq-accordion {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm, 0.5rem);
}
.page-faq .faq-item {
  background: var(--faq-card-bg);
  border: 1px solid var(--faq-border);
  border-radius: var(--faq-radius);
  box-shadow: var(--faq-shadow);
  transition: box-shadow var(--transition-base, 300ms ease), border-color var(--transition-base, 300ms ease);
  clip-path: polygon(0 0, 100% 0, 99.5% 100%, 0.5% 100%);
  overflow: hidden;
}
.page-faq .faq-item:hover,
.page-faq .faq-item:focus-within {
  border-color: var(--faq-primary-light);
  box-shadow: 0 4px 16px rgba(26,58,92,0.12);
}
.page-faq .faq-item[open] {
  border-color: var(--faq-primary);
  box-shadow: 0 4px 20px rgba(26,58,92,0.1);
}
.page-faq .faq-question {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm, 0.5rem);
  padding: var(--spacing-md, 1rem) var(--spacing-lg, 2rem);
  cursor: pointer;
  font-family: var(--font-body, "Noto Sans SC", sans-serif);
  font-size: clamp(1rem, 1.4vw, 1.1rem);
  font-weight: 600;
  color: var(--faq-primary);
  list-style: none;
  user-select: none;
  transition: background var(--transition-fast, 200ms ease);
}
.page-faq .faq-question::-webkit-details-marker {
  display: none;
}
.page-faq .faq-question::marker {
  display: none;
  content: '';
}
.page-faq .faq-question:hover,
.page-faq .faq-question:focus-visible {
  background: rgba(26,58,92,0.03);
}
.page-faq .faq-q-marker {
  flex: 0 0 2rem;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--faq-accent);
  color: #fff;
  font-weight: 700;
  font-size: 0.85rem;
  border-radius: 2px;
  clip-path: polygon(0 0, 100% 0, 85% 100%, 0 100%);
  flex-shrink: 0;
}
.page-faq .faq-q-text {
  flex: 1 1 auto;
}
.page-faq .faq-q-arrow {
  flex: 0 0 auto;
  width: 1.25rem;
  height: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--faq-text-muted);
  transition: transform var(--transition-base, 300ms ease);
}
.page-faq .faq-item[open] .faq-q-arrow {
  transform: rotate(180deg);
  color: var(--faq-accent);
}
.page-faq .faq-answer {
  padding: 0 var(--spacing-lg, 2rem) var(--spacing-lg, 2rem) calc(var(--spacing-lg, 2rem) + 2.5rem);
  font-size: var(--size-body, clamp(1rem, 2vw, 1.2rem));
  color: var(--faq-text);
  line-height: var(--lh-body, 1.6);
  border-top: 1px solid var(--faq-border);
  padding-top: var(--spacing-md, 1rem);
}
.page-faq .faq-answer p {
  margin: 0 0 var(--spacing-sm, 0.5rem);
}
.page-faq .faq-answer p:last-child {
  margin-bottom: 0;
}

/* 章节底部CTA */
.page-faq .faq-chapter-cta {
  margin-top: var(--spacing-md, 1rem);
  text-align: right;
}
.page-faq .faq-chapter-cta .btn {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs, 0.25rem);
}

/* 联系我们卡片 */
.page-faq .faq-contact-card {
  position: relative;
  border-radius: var(--faq-radius);
  overflow: hidden;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  min-height: 280px;
  box-shadow: var(--faq-shadow);
  clip-path: polygon(0 0, 100% 0, 99% 100%, 1% 100%);
  border: 1px solid var(--faq-border);
}
.page-faq .faq-contact-overlay {
  background: linear-gradient(135deg, rgba(26,58,92,0.92) 0%, rgba(44,95,122,0.85) 100%);
  padding: var(--spacing-lg, 2rem) var(--spacing-xl, 3rem);
  color: #fff;
  backdrop-filter: blur(2px);
}
.page-faq .faq-contact-intro {
  font-size: var(--size-body, clamp(1rem, 2vw, 1.2rem));
  max-width: 600px;
  margin: 0 0 var(--spacing-lg, 2rem);
  opacity: 0.95;
  line-height: var(--lh-body, 1.6);
}
.page-faq .faq-contact-list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--spacing-lg, 2rem);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm, 0.5rem);
}
.page-faq .faq-contact-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--spacing-sm, 0.5rem);
  font-size: 1rem;
}
.page-faq .faq-contact-label {
  font-weight: 600;
  min-width: 5.5rem;
  color: var(--clr-highlight, #FFC107);
  opacity: 0.9;
}
.page-faq .faq-contact-item a {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: opacity var(--transition-fast, 200ms ease);
}
.page-faq .faq-contact-item a:hover,
.page-faq .faq-contact-item a:focus-visible {
  opacity: 0.8;
}
.page-faq .faq-contact-item span:last-child {
  opacity: 0.92;
}
.page-faq .faq-contact-note {
  font-size: var(--size-caption, 0.875rem);
  opacity: 0.8;
  margin: 0 0 var(--spacing-md, 1rem);
  max-width: 500px;
}
.page-faq .faq-contact-overlay .btn {
  background: var(--faq-accent);
  color: #fff;
  border: none;
  text-decoration: none;
}
.page-faq .faq-contact-overlay .btn:hover,
.page-faq .faq-contact-overlay .btn:focus-visible {
  background: #b71c1c;
}

/* 进度条与返回顶部 */
.page-faq .scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: 1000;
  pointer-events: none;
  background: transparent;
}
.page-faq .scroll-progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--faq-accent), var(--clr-highlight, #FFC107));
  transition: width 60ms linear;
}
.page-faq .back-to-top {
  position: fixed;
  bottom: var(--spacing-lg, 2rem);
  right: var(--spacing-lg, 2rem);
  z-index: 999;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--faq-primary);
  color: #fff;
  border: none;
  border-radius: var(--faq-radius);
  cursor: pointer;
  box-shadow: var(--shadow-md, 0 4px 12px rgba(0,0,0,0.1));
  transition: opacity var(--transition-fast, 200ms ease), transform var(--transition-fast, 200ms ease);
  clip-path: polygon(0 0, 100% 0, 90% 100%, 10% 100%);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
}
.page-faq .back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.page-faq .back-to-top:hover,
.page-faq .back-to-top:focus-visible {
  background: var(--faq-accent);
  transform: translateY(-2px);
}

/* ===== 桌面端媒体查询 ===== */
@media (min-width: 768px) {
  .page-faq {
    padding: var(--spacing-xl, 3rem) var(--spacing-lg, 2rem) var(--spacing-2xl, 5rem);
  }

  .page-faq .faq-hero {
    flex-wrap: nowrap;
    padding: var(--spacing-xl, 3rem) 0;
  }

  .page-faq .faq-chapter-img {
    display: block;
  }

  .page-faq .faq-chapter-head {
    flex-wrap: nowrap;
    align-items: center;
  }

  .page-faq .faq-chapter-title {
    padding-top: 0;
  }

  .page-faq .faq-answer {
    padding-left: calc(var(--spacing-lg, 2rem) + 3rem);
  }

  .page-faq .faq-contact-card {
    min-height: 320px;
  }
  .page-faq .faq-contact-overlay {
    padding: var(--spacing-xl, 3rem) var(--spacing-2xl, 5rem);
  }
  .page-faq .faq-contact-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--spacing-lg, 2rem);
  }
  .page-faq .faq-contact-item {
    flex: 0 0 auto;
  }
}

/* ===== 大桌面端微调 ===== */
@media (min-width: 1024px) {
  .page-faq .faq-hero-text {
    flex: 0 0 60%;
  }
  .page-faq .faq-chapter {
    padding-left: var(--spacing-lg, 2rem);
  }
  .page-faq .faq-chapter-head {
    gap: var(--spacing-lg, 2rem);
  }
}

/* ===== 辅助类 ===== */
.page-faq .sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}
.page-faq .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.4rem;
  font-family: var(--font-body, "Noto Sans SC", sans-serif);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--faq-radius);
  cursor: pointer;
  transition: background var(--transition-fast, 200ms ease), transform var(--transition-fast, 200ms ease);
  border: none;
  line-height: 1.2;
}
.page-faq .btn-primary {
  background: var(--faq-accent);
  color: #fff;
}
.page-faq .btn-primary:hover,
.page-faq .btn-primary:focus-visible {
  background: #b71c1c;
  transform: translateY(-1px);
}
.page-faq .btn-sm {
  padding: 0.45rem 1rem;
  font-size: 0.875rem;
}

/* 确保所有图片响应式 */
.page-faq img {
  max-width: 100%;
  height: auto;
}

/* 让细节边框颜色在打开时变化更明显 */
.page-faq .faq-item[open] .faq-question {
  border-bottom: 1px solid var(--faq-border);
}
</style>