/* ===== page-faq 专属样式 ===== */
.page-faq {
  --card-shadow: 0 2px 8px rgba(0,0,0,0.08);
  --panel-bg: #ffffff;
  --panel-border: var(--color-border-subtle);
  --panel-radius: 6px;
  --nav-bg: var(--color-background-light);
  --nav-active-bg: #e8e4d8;
  --gold: var(--color-primary-gold);
  --dark-blue: var(--color-primary-dark-blue);
  --mono: var(--font-mono);
}

/* ---------- 移动端优先 (单列) ---------- */
.page-faq .container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 1.5rem 1rem;
}

.page-faq .breadcrumb {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: 1rem;
}

.page-faq .breadcrumb a {
  color: var(--gold);
  text-decoration: none;
}

.page-faq .breadcrumb a:hover {
  text-decoration: underline;
}

.page-faq .page-title {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-text-primary-dark);
  margin: 0 0 0.5rem;
  line-height: 1.2;
}

.page-faq .page-subtitle {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-text-secondary);
  margin: 0 0 2rem;
}

/* 双列布局容器 */
.page-faq .faq-layout {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* 左侧导航 */
.page-faq .faq-nav {
  background: var(--nav-bg);
  border: 1px solid var(--panel-border);
  border-radius: var(--panel-radius);
  padding: 1rem;
  order: 1;
}

.page-faq .faq-nav-heading {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--dark-blue);
  margin: 0 0 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--gold);
}

/* 问题列表 form */
.page-faq .faq-questions {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.page-faq .faq-section-label {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.75rem;
}

.page-faq .faq-section-label:first-of-type {
  margin-top: 0;
}

/* 隐藏 radio */
.page-faq .faq-item input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.page-faq .faq-item label {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.6rem 0.8rem;
  cursor: pointer;
  border-radius: 4px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-text-primary-dark);
  transition: background 0.2s, color 0.2s;
  border-left: 3px solid transparent;
}

.page-faq .faq-item label:hover {
  background: var(--nav-active-bg);
}

/* 序号样式 */
.page-faq .faq-item .q-num {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--gold);
  font-weight: 600;
  flex-shrink: 0;
}

/* 选中状态 */
.page-faq .faq-item input[type="radio"]:checked + label {
  background: var(--nav-active-bg);
  border-left-color: var(--gold);
  color: var(--dark-blue);
  font-weight: 600;
}

/* 右侧答案面板 */
.page-faq .faq-panels {
  order: 2;
  position: relative;
  min-height: 300px;
}

.page-faq .faq-panel {
  display: none;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: var(--panel-radius);
  box-shadow: var(--card-shadow);
  padding: 1.5rem;
}

/* 控制显示：根据 radio checked 显示对应面板 */
#q1:checked ~ .faq-panels #a1,
#q2:checked ~ .faq-panels #a2,
#q3:checked ~ .faq-panels #a3,
#q4:checked ~ .faq-panels #a4,
#q5:checked ~ .faq-panels #a5,
#q6:checked ~ .faq-panels #a6,
#q7:checked ~ .faq-panels #a7,
#q8:checked ~ .faq-panels #a8 {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-faq .panel-content {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.page-faq .panel-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--dark-blue);
  margin: 0;
}

.page-faq .panel-content p {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text-primary-dark);
  margin: 0;
}

.page-faq .panel-content b {
  color: var(--gold);
}

.page-faq .panel-img-wrapper {
  margin: 0.5rem 0 0;
  max-width: 100%;
}

.page-faq .panel-img-wrapper img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  box-shadow: var(--card-shadow);
  display: block;
}

.page-faq .panel-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.5rem;
}

.page-faq .btn {
  display: inline-block;
  padding: 0.5rem 1.2rem;
  background: var(--gold);
  color: var(--color-text-primary-dark);
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 4px;
  text-decoration: none;
  transition: background 0.2s, transform 0.1s;
}

.page-faq .btn:hover,
.page-faq .btn:focus {
  background: var(--color-accent-fluorescent-green);
  color: var(--dark-blue);
  transform: scale(1.02);
}

/* 底部帮助 */
.page-faq .faq-help {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--panel-border);
  text-align: center;
  font-family: var(--font-body);
  color: var(--color-text-secondary);
}

.page-faq .faq-help a {
  color: var(--gold);
  text-decoration: none;
  font-weight: 600;
}

.page-faq .faq-help a:hover {
  text-decoration: underline;
}

/* ---------- 桌面端 ( ≥768px ) ---------- */
@media (min-width: 768px) {
  .page-faq .container {
    padding: 2rem 2rem 3rem;
  }

  .page-faq .page-title {
    font-size: 2.2rem;
  }

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

  /* 左侧固定宽度 */
  .page-faq .faq-nav {
    flex: 0 0 320px;
    position: sticky;
    top: 90px; /* 适应头部高度 */
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    order: 0;
  }

  .page-faq .faq-panels {
    flex: 1;
    order: 0;
  }

  .page-faq .panel-content p {
    font-size: 1.05rem;
  }

  .page-faq .panel-img-wrapper img {
    max-width: 100%;
    height: auto;
  }
}

/* ---------- 大桌面端 ( ≥1024px ) ---------- */
@media (min-width: 1024px) {
  .page-faq .faq-nav {
    flex-basis: 360px;
  }
}

/* 确保 radio 与面板关联通过 CSS 兄弟选择器：radio 和面板在同一个父级 .faq-layout 下 */
/* 由于 radio 在 .faq-nav 内，面板在同级 .faq-panels，可使用 ~ 选择器 */
/* 已实现：.page-faq .faq-item input:checked ~ .faq-panels #a1 等 */
/* 注意 ~ 选择器要求.sibling 通用后续兄弟，实际 .faq-panels 是 .faq-nav 的后续兄弟，故可行 */