/* ===== 页面专属：问答中心 ===== */
.page-faq {
  --faq-gap: 1.25rem;
  --faq-card-radius: 12px;
  --faq-card-bg: #FFFFFF;
  --faq-card-shadow: 0 2px 8px rgba(44, 26, 14, 0.07);
  --faq-card-shadow-hover: 0 6px 20px rgba(44, 26, 14, 0.12);
  --faq-border-color: #E0D8CE;
  --faq-question-color: #2C1A0E;
  --faq-answer-color: #5A3E2B;
  --faq-icon-size: 32px;
  --faq-toggle-size: 28px;
  --faq-transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 页面引导 */
.page-faq__intro {
  margin-bottom: 2.5rem;
  font-size: 1.05rem;
  color: var(--color-medium-brown, #5A3E2B);
  max-width: 680px;
  line-height: 1.7;
  border-left: 3px solid var(--color-red-orange, #D94A3D);
  padding-left: 1rem;
}

/* 章节容器 */
.page-faq__section {
  margin-bottom: 3.5rem;
  scroll-margin-top: 2rem;
}

/* 章节头部 */
.page-faq__section-head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid var(--color-light-gray, #E0D8CE);
  padding-bottom: 0.75rem;
  position: relative;
}

.page-faq__section-head .tag {
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.7rem;
  border-radius: 20px;
  line-height: 1.4;
}

.page-faq__section-head h2 {
  margin: 0;
  font-weight: 800;
  font-size: clamp(1.3rem, 3vw, 1.75rem);
  color: var(--color-dark-brown, #2C1A0E);
  letter-spacing: -0.01em;
}

.page-faq__section-head .caption-vertical {
  margin-left: auto;
  font-size: 0.75rem;
  color: var(--color-medium-brown, #5A3E2B);
  opacity: 0.7;
  writing-mode: vertical-lr;
  transform: rotate(180deg);
  height: 3em;
  line-height: 1.2;
  white-space: nowrap;
}

/* 问答网格 */
.page-faq__grid {
  gap: var(--faq-gap);
}

/* 单个问答项 */
.page-faq__item {
  background: var(--faq-card-bg);
  border-radius: var(--faq-card-radius);
  box-shadow: var(--faq-card-shadow);
  border: 1px solid var(--faq-border-color);
  overflow: hidden;
  transition: box-shadow var(--faq-transition), transform var(--faq-transition);
  position: relative;
}

.page-faq__item:hover {
  box-shadow: var(--faq-card-shadow-hover);
  transform: translateY(-2px);
}

/* 隐藏原生radio */
.page-faq__item-radio {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

/* 卡片头部（可点击区域） */
.page-faq__item-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1rem 1rem 1.25rem;
  cursor: pointer;
  user-select: none;
  transition: background var(--faq-transition);
  min-height: 60px;
}

.page-faq__item-header:hover {
  background: rgba(217, 74, 61, 0.04);
}

.page-faq__item-header:active {
  background: rgba(217, 74, 61, 0.08);
}

/* 装饰图标 */
.page-faq__item-icon {
  width: var(--faq-icon-size);
  height: var(--faq-icon-size);
  border-radius: 8px;
  object-fit: cover;
  flex-shrink: 0;
  transition: transform var(--faq-transition), box-shadow var(--faq-transition);
  background: var(--color-cream, #F5F0E8);
}

.page-faq__item:hover .page-faq__item-icon {
  transform: scale(1.08) rotate(-3deg);
  box-shadow: 0 2px 8px rgba(217, 74, 61, 0.15);
}

/* 问题文本 */
.page-faq__item-question {
  flex: 1;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--faq-question-color);
  line-height: 1.4;
  letter-spacing: -0.01em;
}

/* 切换图标 (+) */
.page-faq__item-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--faq-toggle-size);
  height: var(--faq-toggle-size);
  border-radius: 50%;
  background: var(--color-cream, #F5F0E8);
  color: var(--color-red-orange, #D94A3D);
  font-size: 1.3rem;
  font-weight: 300;
  line-height: 1;
  flex-shrink: 0;
  transition: transform var(--faq-transition), background var(--faq-transition), color var(--faq-transition);
  position: relative;
}

/* 答案区域（默认收起） */
.page-faq__item-body {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  padding: 0 1.25rem 0 1.25rem;
  transition: max-height var(--faq-transition), opacity var(--faq-transition), padding var(--faq-transition);
  color: var(--faq-answer-color);
  font-size: 0.92rem;
  line-height: 1.65;
  border-top: 0 solid var(--faq-border-color);
}

.page-faq__item-body p {
  margin: 0 0 0.75rem 0;
}

.page-faq__item-body .btn {
  margin-top: 0.25rem;
  font-size: 0.82rem;
  padding: 0.35rem 0.9rem;
}

/* 选中态：展开答案 + 图标旋转 */
.page-faq__item-radio:checked ~ .page-faq__item-body {
  max-height: 400px;
  opacity: 1;
  padding: 1rem 1.25rem 1.25rem 1.25rem;
  border-top-width: 1px;
}

.page-faq__item-radio:checked ~ .page-faq__item-header .page-faq__item-toggle {
  transform: rotate(135deg);
  background: var(--color-red-orange, #D94A3D);
  color: #FFFFFF;
}

/* 选中时头部背景微变 */
.page-faq__item-radio:checked ~ .page-faq__item-header {
  background: rgba(217, 74, 61, 0.04);
}

/* 焦点样式（键盘导航） */
.page-faq__item-radio:focus-visible ~ .page-faq__item-header {
  outline: 2px solid var(--color-red-orange, #D94A3D);
  outline-offset: -2px;
  border-radius: var(--faq-card-radius) var(--faq-card-radius) 0 0;
}

/* 示意图 */
.page-faq__figure {
  margin: 0 0 1.5rem 0;
  padding: 0;
  border-radius: var(--faq-card-radius);
  overflow: hidden;
  box-shadow: var(--faq-card-shadow);
  background: var(--color-cream, #F5F0E8);
  display: inline-block;
  max-width: 100%;
}

.page-faq__figure-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 400 / 200;
}

.page-faq__figure-caption {
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
  color: var(--color-medium-brown, #5A3E2B);
  font-weight: 400;
  letter-spacing: 0.02em;
  background: rgba(255, 255, 255, 0.7);
  border-top: 1px solid var(--faq-border-color);
}

/* 导航链接按钮在卡片内 */
.page-faq__item-body .btn-outline {
  border-color: var(--color-medium-brown, #5A3E2B);
  color: var(--color-dark-brown, #2C1A0E);
  background: transparent;
  transition: background var(--transition-fast, 0.2s), color var(--transition-fast, 0.2s), border-color var(--transition-fast, 0.2s);
}

.page-faq__item-body .btn-outline:hover {
  background: var(--color-dark-brown, #2C1A0E);
  color: #FFFFFF;
  border-color: var(--color-dark-brown, #2C1A0E);
}

/* 响应式 - 桌面大屏 (≥1024px) */
@media (min-width: 1024px) {
  .page-faq {
    padding-top: 0.5rem;
  }

  .page-faq__intro {
    font-size: 1.1rem;
    margin-bottom: 3rem;
  }

  .page-faq__section {
    margin-bottom: 4.5rem;
  }

  .page-faq__section-head {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
  }

  .page-faq__section-head h2 {
    font-size: 1.8rem;
  }

  .page-faq__grid.grid-2 {
    grid-template-columns: 1fr 1fr;
  }

  .page-faq__item-header {
    padding: 1.15rem 1.25rem 1.15rem 1.5rem;
    min-height: 68px;
  }

  .page-faq__item-question {
    font-size: 1rem;
  }

  .page-faq__item-body {
    font-size: 0.95rem;
  }

  .page-faq__item-radio:checked ~ .page-faq__item-body {
    padding: 1.15rem 1.5rem 1.4rem 1.5rem;
  }

  .page-faq__figure {
    max-width: 60%;
  }
}

/* 响应式 - 平板 (768px~1023px) */
@media (min-width: 768px) and (max-width: 1023px) {
  .page-faq__grid.grid-2 {
    grid-template-columns: 1fr 1fr;
  }
}

/* 响应式 - 窄屏 (<768px) */
@media (max-width: 767px) {
  .page-faq {
    padding: 0 0.25rem;
  }

  .page-faq__intro {
    font-size: 0.95rem;
    margin-bottom: 1.8rem;
    padding-left: 0.75rem;
  }

  .page-faq__section {
    margin-bottom: 2.8rem;
  }

  .page-faq__section-head {
    flex-wrap: wrap;
    gap: 0.5rem;
    padding-bottom: 0.5rem;
  }

  .page-faq__section-head .caption-vertical {
    display: none;
  }

  .page-faq__section-head h2 {
    font-size: 1.2rem;
  }

  .page-faq__grid.grid-2 {
    grid-template-columns: 1fr;
  }

  .page-faq__item-header {
    padding: 0.85rem 0.85rem 0.85rem 1rem;
    min-height: 52px;
    gap: 0.6rem;
  }

  .page-faq__item-icon {
    width: 28px;
    height: 28px;
  }

  .page-faq__item-question {
    font-size: 0.88rem;
  }

  .page-faq__item-toggle {
    width: 24px;
    height: 24px;
    font-size: 1.1rem;
  }

  .page-faq__item-body {
    font-size: 0.85rem;
    padding: 0 1rem 0 1rem;
  }

  .page-faq__item-radio:checked ~ .page-faq__item-body {
    padding: 0.75rem 1rem 1rem 1rem;
  }

  .page-faq__figure {
    max-width: 100%;
  }

  .page-faq__figure-caption {
    font-size: 0.72rem;
    padding: 0.4rem 0.75rem;
  }
}

/* 过渡安全（无JS降级） */
.page-faq__item-body {
  box-sizing: content-box;
}

/* 卡片间分隔装饰 */
.page-faq__section + .page-faq__section::before {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--color-red-orange, #D94A3D);
  margin-bottom: 1.5rem;
  border-radius: 2px;
  opacity: 0.35;
}

@media (max-width: 767px) {
  .page-faq__section + .page-faq__section::before {
    width: 40px;
    margin-bottom: 1rem;
  }
}