/* ===== page-faq 专属样式 ===== */
.page-faq {
  --faq-gold: var(--color-gold, #D4AF37);
  --faq-orange: var(--color-orange, #FF6B35);
  --faq-bg-dark: var(--color-bg-dark, #0A1628);
  --faq-text-primary: var(--color-text-primary, #E8ECF0);
  --faq-text-secondary: var(--color-text-secondary, #A0AAB5);
  --faq-card-bg: var(--color-card-bg, rgba(255,255,255,0.08));
  --faq-border-subtle: var(--color-border-subtle, rgba(212,175,55,0.3));
  --faq-hover-overlay: var(--color-hover-overlay, rgba(212,175,55,0.1));
  --faq-deep-blue: var(--color-deep-blue, #0B1D3A);
  --faq-snow-white: var(--color-snow-white, #F5F7FA);
  --faq-font-heading: var(--font-heading, 'Noto Sans Tibetan', 'Tibetan Serif', serif);
  --faq-font-body: var(--font-body, 'Inter', 'Noto Sans SC', sans-serif);
  --faq-max-width: var(--max-width, 1200px);
  --faq-transition: var(--transition-base, 0.3s ease);

  background-color: var(--faq-bg-dark);
  color: var(--faq-text-primary);
  font-family: var(--faq-font-body);
  line-height: 1.6;
  padding-bottom: 3rem;
}

/* 容器 */
.page-faq .container {
  max-width: var(--faq-max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* 面包屑 */
.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1.5rem 0 0.5rem;
  font-size: 0.875rem;
  color: var(--faq-text-secondary);
}
.page-faq .breadcrumb a {
  color: var(--faq-gold);
  text-decoration: none;
  transition: color var(--faq-transition);
}
.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus {
  color: var(--faq-orange);
  text-decoration: underline;
}
.page-faq .breadcrumb-sep {
  color: var(--faq-text-secondary);
}
.page-faq .breadcrumb [aria-current="page"] {
  color: var(--faq-text-primary);
  font-weight: 500;
}

/* Hero 区 */
.page-faq .faq-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  padding: 1.5rem 0 2rem;
  border-bottom: 1px solid var(--faq-border-subtle);
}
.page-faq .faq-hero-text {
  flex: 1;
  text-align: center;
}
.page-faq .faq-title {
  font-family: var(--faq-font-heading);
  font-size: 2.25rem;
  font-weight: 700;
  margin: 0 0 0.25rem;
  color: var(--faq-snow-white);
  letter-spacing: 0.02em;
}
.page-faq .faq-subtitle {
  font-size: 1.05rem;
  color: var(--faq-text-secondary);
  margin: 0;
  font-weight: 400;
}
.page-faq .faq-hero-img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
  border: 1px solid var(--faq-border-subtle);
  width: 300px;
}

/* 主交互区：分类 + 问题列表 */
.page-faq .faq-tabs {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding: 2rem 0 1rem;
}

/* 分类标签（展览标签样式） */
.page-faq .faq-categories {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}
.page-faq .faq-cat-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.4rem;
  background: var(--faq-card-bg);
  border: 1px solid var(--faq-border-subtle);
  border-radius: 8px;
  color: var(--faq-text-secondary);
  font-family: var(--faq-font-body);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--faq-transition), border-color var(--faq-transition), color var(--faq-transition), box-shadow var(--faq-transition);
  user-select: none;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.page-faq .faq-cat-label:hover {
  background: var(--faq-hover-overlay);
  border-color: var(--faq-gold);
  color: var(--faq-snow-white);
}
.page-faq .faq-cat-label:focus-visible {
  outline: 2px solid var(--faq-gold);
  outline-offset: 2px;
}
.page-faq .faq-cat-icon {
  width: 20px;
  height: 20px;
  object-fit: contain;
  opacity: 0.7;
  flex-shrink: 0;
}

/* 选中状态 */
.page-faq #fc-guide:checked ~ .faq-categories label[for="fc-guide"],
.page-faq #fc-member:checked ~ .faq-categories label[for="fc-member"],
.page-faq #fc-support:checked ~ .faq-categories label[for="fc-support"] {
  background: var(--faq-gold);
  border-color: var(--faq-gold);
  color: var(--faq-deep-blue);
  box-shadow: 0 4px 20px rgba(212,175,55,0.3);
}
.page-faq #fc-guide:checked ~ .faq-categories label[for="fc-guide"] .faq-cat-icon,
.page-faq #fc-member:checked ~ .faq-categories label[for="fc-member"] .faq-cat-icon,
.page-faq #fc-support:checked ~ .faq-categories label[for="fc-support"] .faq-cat-icon {
  opacity: 1;
  filter: brightness(0.2);
}

/* 问题组容器 */
.page-faq .faq-groups {
  flex: 1;
  min-width: 0;
}

/* 每组问题列表（默认隐藏，通过 radio 控制显示） */
.page-faq .faq-group {
  display: none;
  animation: faqFadeIn 0.35s ease;
}
@keyframes faqFadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.page-faq #fc-guide:checked ~ .faq-groups .faq-group[data-category="guide"],
.page-faq #fc-member:checked ~ .faq-groups .faq-group[data-category="member"],
.page-faq #fc-support:checked ~ .faq-groups .faq-group[data-category="support"] {
  display: block;
}

/* 单个问题折叠面板 */
.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-border-subtle);
  margin-bottom: 0;
}
.page-faq .faq-item:first-child {
  border-top: 1px solid var(--faq-border-subtle);
}

/* 问题标题 */
.page-faq .faq-question {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 0.5rem;
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--faq-text-primary);
  cursor: pointer;
  transition: color var(--faq-transition), background var(--faq-transition);
  user-select: none;
  margin: 0;
  line-height: 1.4;
}
.page-faq .faq-question:hover {
  color: var(--faq-gold);
  background: var(--faq-hover-overlay);
  border-radius: 4px;
}
.page-faq .faq-question:focus-visible {
  outline: 2px solid var(--faq-gold);
  outline-offset: -2px;
  border-radius: 4px;
}

/* 金色问号图标 */
.page-faq .faq-q-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1.5px solid var(--faq-gold);
  color: var(--faq-gold);
  font-size: 1rem;
  font-weight: 700;
  flex-shrink: 0;
  background: transparent;
  transition: background var(--faq-transition), color var(--faq-transition);
}
.page-faq .faq-question:hover .faq-q-icon {
  background: var(--faq-gold);
  color: var(--faq-deep-blue);
}

/* 答案区（折叠） */
.page-faq .faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
}
.page-faq .faq-answer-inner {
  padding: 0 0.5rem 1rem 2.8rem;
  color: var(--faq-text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  border-left: 2px solid var(--faq-gold);
  margin-left: 0.75rem;
}
.page-faq .faq-answer-inner a {
  color: var(--faq-gold);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--faq-transition);
}
.page-faq .faq-answer-inner a:hover,
.page-faq .faq-answer-inner a:focus {
  color: var(--faq-orange);
}

/* checkbox 展开控制 */
.page-faq .faq-toggle:checked ~ .faq-answer {
  max-height: 600px; /* 足够容纳长答案 */
}
.page-faq .faq-toggle:checked ~ .faq-question {
  color: var(--faq-gold);
}
.page-faq .faq-toggle:checked ~ .faq-question .faq-q-icon {
  background: var(--faq-gold);
  color: var(--faq-deep-blue);
}

/* 法律提示 */
.page-faq .faq-legal-note {
  margin-top: 2.5rem;
  padding: 1.25rem 1.5rem;
  background: var(--faq-card-bg);
  border: 1px solid var(--faq-border-subtle);
  border-radius: 8px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--faq-text-secondary);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.page-faq .faq-legal-note a {
  color: var(--faq-gold);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.page-faq .faq-legal-note a:hover {
  color: var(--faq-orange);
}

/* 隐藏 radio 控件 */
.page-faq .faq-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ===== 桌面端 (min-width: 769px) ===== */
@media (min-width: 769px) {
  .page-faq .faq-hero {
    flex-direction: row;
    text-align: left;
    padding: 2rem 0 2.5rem;
  }
  .page-faq .faq-hero-text {
    text-align: left;
  }
  .page-faq .faq-title {
    font-size: 3rem;
  }
  .page-faq .faq-subtitle {
    font-size: 1.15rem;
  }
  .page-faq .faq-hero-img {
    width: 300px;
    flex-shrink: 0;
  }

  .page-faq .faq-tabs {
    flex-direction: row;
    gap: 2.5rem;
    padding: 2.5rem 0 1.5rem;
  }

  .page-faq .faq-categories {
    flex: 0 0 180px;
    flex-direction: column;
    gap: 0.5rem;
    justify-content: flex-start;
    padding-top: 0.5rem;
  }
  .page-faq .faq-cat-label {
    width: 100%;
    justify-content: flex-start;
    padding: 0.75rem 1.2rem;
    font-size: 1rem;
  }
  .page-faq .faq-cat-icon {
    width: 24px;
    height: 24px;
  }

  .page-faq .faq-groups {
    flex: 1;
  }

  .page-faq .faq-question {
    padding: 1.15rem 0.75rem;
    font-size: 1.1rem;
  }
  .page-faq .faq-answer-inner {
    padding-left: 3rem;
  }
}

/* ===== 大桌面端微调 (min-width: 1024px) ===== */
@media (min-width: 1024px) {
  .page-faq .faq-categories {
    flex-basis: 200px;
  }
  .page-faq .faq-title {
    font-size: 3.25rem;
  }
}