/* ===== 页面专属：FAQ ===== */
.page-faq {
  --faq-hero-bg: var(--color-gray, #5B5B5B);
  --faq-accent: var(--color-red, #E63946);
  --faq-green: var(--color-green, #2A9D8F);
  --faq-light: var(--color-light, #F4F4F4);
  --faq-dark: var(--color-dark, #1A1A1A);
  --faq-border: var(--color-border, #D3D3D3);
  --faq-white: #FFFFFF;
  --faq-font-headline: var(--font-headline, Impact, 'Arial Black', sans-serif);
  --faq-font-body: var(--font-body, 'Noto Serif SC', 'Times New Roman', serif);
  --faq-font-mono: var(--font-mono, monospace);
  --faq-radius: 4px;
  --faq-shadow: 0 2px 8px rgba(0,0,0,0.08);
  --faq-shadow-hover: 0 4px 16px rgba(0,0,0,0.12);
  --faq-max-width: 1200px;

  display: block;
  width: 100%;
  max-width: 100%;
  background: var(--faq-white);
  color: var(--faq-dark);
  font-family: var(--faq-font-body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 面包屑 */
.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  padding: 0.75rem 1rem;
  max-width: var(--faq-max-width);
  margin: 0 auto;
  font-size: 0.8rem;
  font-family: var(--faq-font-body);
  color: var(--faq-dark);
  opacity: 0.7;
}

.page-faq .breadcrumb a {
  color: var(--faq-accent);
  text-decoration: none;
  font-weight: 600;
  transition: opacity 0.2s;
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  opacity: 0.75;
  text-decoration: underline;
}

.page-faq .breadcrumb__sep {
  color: var(--faq-border);
  font-size: 1.1em;
  line-height: 1;
}

/* Hero 区 */
.page-faq__hero {
  background: var(--faq-hero-bg);
  padding: 2rem 1rem 1.8rem;
  position: relative;
  overflow: hidden;
}

/* 斜线装饰 */
.page-faq__hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 6px;
  background: repeating-linear-gradient(
    45deg,
    var(--faq-accent) 0px,
    var(--faq-accent) 12px,
    transparent 12px,
    transparent 20px
  );
}

.page-faq__hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  right: 0;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle at 100% 100%, rgba(230,57,70,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.page-faq__title {
  font-family: var(--faq-font-headline);
  font-size: 2.4rem;
  font-weight: 900;
  color: var(--faq-white);
  text-align: center;
  margin: 0 0 0.35rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  position: relative;
  z-index: 1;
}

.page-faq__subtitle {
  font-family: var(--faq-font-body);
  font-size: 0.95rem;
  color: rgba(255,255,255,0.8);
  text-align: center;
  margin: 0 auto 1.25rem;
  max-width: 600px;
  line-height: 1.5;
  position: relative;
  z-index: 1;
}

/* 搜索框 */
.page-faq__search {
  position: relative;
  max-width: 520px;
  margin: 0 auto 1.25rem;
  z-index: 1;
}

.page-faq__search-input {
  display: block;
  width: 100%;
  padding: 0.7rem 1rem 0.7rem 2.8rem;
  font-family: var(--faq-font-body);
  font-size: 0.95rem;
  color: var(--faq-dark);
  background: var(--faq-white);
  border: 2px solid transparent;
  border-radius: var(--faq-radius);
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  transition: border-color 0.25s, box-shadow 0.25s;
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

.page-faq__search-input::placeholder {
  color: #999;
  opacity: 1;
}

.page-faq__search-input:focus {
  border-color: var(--faq-accent);
  box-shadow: 0 0 0 3px rgba(230,57,70,0.2), 0 2px 8px rgba(0,0,0,0.1);
}

.page-faq__search-icon {
  position: absolute;
  left: 0.9rem;
  top: 50%;
  transform: translateY(-50%);
  color: #888;
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 分类标签组 */
.page-faq__categories {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  position: relative;
  z-index: 1;
  max-width: 700px;
  margin: 0 auto;
}

.page-faq__category {
  font-family: var(--faq-font-body);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.4rem 0.9rem;
  background: rgba(255,255,255,0.12);
  color: var(--faq-white);
  border: 1.5px solid rgba(255,255,255,0.2);
  border-radius: 20px;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.page-faq__category:hover {
  background: rgba(255,255,255,0.22);
  border-color: rgba(255,255,255,0.35);
}

.page-faq__category.is-active {
  background: var(--faq-accent);
  border-color: var(--faq-accent);
  color: var(--faq-white);
}

.page-faq__category:focus-visible {
  outline: 2px solid var(--faq-white);
  outline-offset: 2px;
}

/* 主体两栏布局 */
.page-faq__body {
  display: flex;
  flex-direction: column;
  max-width: var(--faq-max-width);
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
  gap: 1.5rem;
}

/* 侧边栏 */
.page-faq__sidebar {
  flex-shrink: 0;
  width: 100%;
}

.page-faq__sidebar-title {
  font-family: var(--faq-font-headline);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--faq-dark);
  margin: 0 0 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--faq-accent);
  display: inline-block;
}

.page-faq__sidebar-list {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.4rem;
}

.page-faq__sidebar-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.55rem 0.8rem;
  font-family: var(--faq-font-body);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--faq-dark);
  background: var(--faq-light);
  border: 1px solid var(--faq-border);
  border-radius: var(--faq-radius);
  text-decoration: none;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.page-faq__sidebar-link:hover,
.page-faq__sidebar-link:focus-visible {
  background: var(--faq-accent);
  border-color: var(--faq-accent);
  color: var(--faq-white);
}

.page-faq__sidebar-count {
  font-family: var(--faq-font-mono);
  font-size: 0.75rem;
  background: rgba(0,0,0,0.08);
  padding: 0.1rem 0.45rem;
  border-radius: 10px;
  transition: background 0.2s;
}

.page-faq__sidebar-link:hover .page-faq__sidebar-count,
.page-faq__sidebar-link:focus-visible .page-faq__sidebar-count {
  background: rgba(255,255,255,0.2);
}

.page-faq__sidebar-cta {
  background: var(--faq-light);
  border: 1px solid var(--faq-border);
  border-radius: var(--faq-radius);
  padding: 1rem 1.2rem;
  text-align: center;
}

.page-faq__sidebar-cta-text {
  font-family: var(--faq-font-body);
  font-size: 0.9rem;
  color: var(--faq-dark);
  margin: 0 0 0.6rem;
  opacity: 0.8;
}

.page-faq__sidebar-cta .btn {
  font-size: 0.85rem;
  padding: 0.45rem 1.2rem;
}

/* 手风琴区 */
.page-faq__accordion {
  flex: 1;
  min-width: 0;
}

.page-faq__section-heading {
  font-family: var(--faq-font-headline);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--faq-dark);
  margin: 2rem 0 0.75rem;
  padding: 0 0 0.3rem;
  border-bottom: 2px solid var(--faq-border);
  position: relative;
}

.page-faq__section-heading::after {
  content: "";
  display: block;
  width: 48px;
  height: 3px;
  background: var(--faq-accent);
  margin-top: 0.25rem;
}

.page-faq__section-heading:first-of-type {
  margin-top: 0;
}

/* 单个手风琴项 */
.page-faq__item {
  display: block;
  margin-bottom: 0.5rem;
  border: 1px solid var(--faq-border);
  border-radius: var(--faq-radius);
  background: var(--faq-white);
  box-shadow: var(--faq-shadow);
  overflow: hidden;
  transition: box-shadow 0.25s;
}

.page-faq__item:hover {
  box-shadow: var(--faq-shadow-hover);
}

.page-faq__item[open] {
  box-shadow: var(--faq-shadow-hover);
  border-color: var(--faq-accent);
}

/* 问题标题 */
.page-faq__question {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1rem;
  font-family: var(--faq-font-body);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--faq-dark);
  background: var(--faq-light);
  cursor: pointer;
  list-style: none;
  transition: background 0.2s;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

/* 移除默认三角 */
.page-faq__question::-webkit-details-marker {
  display: none;
}

.page-faq__question::marker {
  display: none;
  content: "";
}

.page-faq__item[open] .page-faq__question {
  background: var(--faq-white);
  border-bottom: 1px solid var(--faq-border);
}

.page-faq__question:hover {
  background: #EBEBEB;
}

.page-faq__item[open] .page-faq__question:hover {
  background: #F9F9F9;
}

.page-faq__q-icon {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  font-family: var(--faq-font-headline);
  font-size: 0.75rem;
  font-weight: 900;
  color: var(--faq-white);
  background: var(--faq-accent);
  border-radius: 50%;
  line-height: 1;
}

.page-faq__question-text {
  flex: 1;
  min-width: 0;
}

.page-faq__arrow {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #888;
  transition: transform 0.3s ease;
  line-height: 1;
}

.page-faq__item[open] .page-faq__arrow {
  transform: rotate(180deg);
  color: var(--faq-accent);
}

/* 答案内容 */
.page-faq__answer {
  padding: 1rem 1.2rem 1.2rem;
  font-family: var(--faq-font-body);
  font-size: 0.92rem;
  color: var(--faq-dark);
  line-height: 1.7;
  background: var(--faq-white);
  animation: faqFadeIn 0.3s ease-out;
}

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

.page-faq__answer p {
  margin: 0 0 0.65rem;
}

.page-faq__answer p:last-child {
  margin-bottom: 0;
}

.page-faq__answer strong {
  color: var(--faq-accent);
  font-weight: 700;
}

.page-faq__answer a {
  color: var(--faq-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  font-weight: 600;
  transition: opacity 0.2s;
}

.page-faq__answer a:hover {
  opacity: 0.75;
}

/* 联系列表 */
.page-faq__contact-list {
  list-style: none;
  margin: 0.4rem 0 0.6rem;
  padding: 0;
}

.page-faq__contact-list li {
  padding: 0.2rem 0 0.2rem 1.2rem;
  position: relative;
  font-size: 0.9rem;
}

.page-faq__contact-list li::before {
  content: "·";
  position: absolute;
  left: 0.2rem;
  color: var(--faq-accent);
  font-weight: 900;
  font-size: 1.2rem;
}

/* 图片 */
.page-faq__figure {
  margin: 0.8rem 0 0;
  border-radius: var(--faq-radius);
  overflow: hidden;
  background: var(--faq-light);
  border: 1px solid var(--faq-border);
  max-width: 100%;
}

.page-faq__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 4 / 3;
  background: #E8E8E8;
}

.page-faq__figcaption {
  padding: 0.4rem 0.75rem;
  font-size: 0.78rem;
  font-family: var(--faq-font-body);
  color: #666;
  background: var(--faq-light);
  border-top: 1px solid var(--faq-border);
}

/* ===== 响应式：移动端优先，桌面端增强 ===== */

/* 窄屏：> 0 (默认即为移动端) */
@media (max-width: 639px) {
  .page-faq__title {
    font-size: 1.8rem;
  }

  .page-faq__subtitle {
    font-size: 0.85rem;
  }

  .page-faq__categories {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    justify-content: flex-start;
    padding-bottom: 0.25rem;
    gap: 0.4rem;
  }

  .page-faq__categories::-webkit-scrollbar {
    display: none;
  }

  .page-faq__category {
    flex-shrink: 0;
    font-size: 0.78rem;
    padding: 0.35rem 0.75rem;
  }

  .page-faq__sidebar-list {
    grid-template-columns: 1fr 1fr;
  }

  .page-faq__section-heading {
    font-size: 1.3rem;
  }

  .page-faq__question {
    font-size: 0.88rem;
    padding: 0.7rem 0.8rem;
  }

  .page-faq__answer {
    font-size: 0.85rem;
    padding: 0.8rem 0.9rem 1rem;
  }
}

/* 中屏及以上：显示侧边栏为垂直列表 */
@media (min-width: 640px) {
  .page-faq__hero {
    padding: 2.5rem 2rem 2rem;
  }

  .page-faq__title {
    font-size: 2.8rem;
  }

  .page-faq__subtitle {
    font-size: 1rem;
  }

  .page-faq__body {
    flex-direction: row;
    align-items: flex-start;
    padding: 2rem 2rem 4rem;
    gap: 2rem;
  }

  .page-faq__sidebar {
    width: 220px;
    position: sticky;
    top: 2rem;
  }

  .page-faq__sidebar-list {
    grid-template-columns: 1fr;
  }

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

  .page-faq__section-heading {
    font-size: 1.8rem;
  }

  .page-faq__question {
    font-size: 0.95rem;
    padding: 0.9rem 1.2rem;
  }
}

/* 桌面大屏 */
@media (min-width: 1024px) {
  .page-faq__hero {
    padding: 3rem 2rem 2.2rem;
  }

  .page-faq__title {
    font-size: 3.2rem;
  }

  .page-faq__sidebar {
    width: 250px;
  }

  .page-faq__body {
    padding: 2.5rem 2rem 5rem;
    gap: 2.5rem;
  }

  .page-faq__question {
    padding: 1rem 1.5rem;
    font-size: 1rem;
  }

  .page-faq__answer {
    padding: 1.2rem 1.5rem 1.5rem;
    font-size: 0.95rem;
  }
}

/* 超大屏 */
@media (min-width: 1280px) {
  .page-faq__hero {
    padding: 3.5rem 2rem 2.5rem;
  }

  .page-faq__title {
    font-size: 3.6rem;
  }

  .page-faq__sidebar {
    width: 280px;
  }
}

/* ===== 减少动效 ===== */
@media (prefers-reduced-motion: reduce) {
  .page-faq__arrow {
    transition: none;
  }

  .page-faq__answer {
    animation: none;
  }

  .page-faq__item,
  .page-faq__question,
  .page-faq__search-input,
  .page-faq__category,
  .page-faq__sidebar-link {
    transition: none;
  }
}

/* ===== 高对比度支持 ===== */
@media (prefers-contrast: high) {
  .page-faq__answer strong {
    color: #B3001B;
  }

  .page-faq__category.is-active {
    outline: 2px solid var(--faq-white);
  }

  .page-faq__sidebar-link {
    border-width: 2px;
  }
}

/* ===== 打印样式 ===== */
@media print {
  .page-faq__hero {
    background: none !important;
    color: #000 !important;
    padding: 1rem 0;
  }

  .page-faq__title,
  .page-faq__subtitle {
    color: #000 !important;
  }

  .page-faq__search,
  .page-faq__categories,
  .page-faq__sidebar-cta {
    display: none !important;
  }

  .page-faq__item {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ccc;
  }

  .page-faq__question {
    background: #f5f5f5 !important;
  }

  .page-faq__arrow {
    display: none !important;
  }
}