/* ===== 页面专属 CSS — FAQ ===== */
.page-faq {
  --faq-hero-bg: var(--color-surface, #F4F6F9);
  --faq-hero-title: var(--color-primary, #0B1D3A);
  --faq-accent: var(--color-accent, #FF6B35);
  --faq-text: var(--color-text-primary, #1A1A1A);
  --faq-text-light: var(--color-text-secondary, #5A5A5A);
  --faq-border: var(--color-border, #D1D5DB);
  --faq-card-bg: var(--color-background, #FFFFFF);
  --faq-font-heading: var(--font-heading, 'Helvetica Neue', Helvetica, Arial, sans-serif);
  --faq-font-body: var(--font-body, Georgia, 'Times New Roman', serif);
  --faq-radius: 0px;
  --faq-transition: var(--transition-fast, 0.2s ease);

  display: block;
  background-color: var(--color-background, #FFFFFF);
  font-family: var(--faq-font-body);
  color: var(--faq-text);
  line-height: var(--line-height-body, 1.6);
  padding-bottom: 3rem;
}

/* ---------- 面包屑 ---------- */
.page-faq__breadcrumb {
  max-width: var(--container-max, 1200px);
  margin: 0 auto;
  padding: 1rem 1.25rem 0;
  font-family: var(--faq-font-heading);
  font-size: var(--font-size-small, 14px);
  color: var(--faq-text-light);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
}
.page-faq__breadcrumb-link {
  color: var(--faq-accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--faq-transition);
}
.page-faq__breadcrumb-link:hover,
.page-faq__breadcrumb-link:focus-visible {
  border-bottom-color: var(--faq-accent);
}
.page-faq__breadcrumb-sep {
  color: var(--faq-border);
  user-select: none;
}
.page-faq__breadcrumb-current {
  color: var(--faq-text-light);
  font-weight: 400;
}

/* ---------- Hero ---------- */
.page-faq__hero {
  background-color: var(--faq-hero-bg);
  border-bottom: 3px solid var(--faq-accent);
  margin-bottom: 2rem;
}
.page-faq__hero-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  padding: 2rem 1.25rem;
}
.page-faq__hero-text {
  text-align: center;
}
.page-faq__hero-title {
  font-family: var(--faq-font-heading);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--faq-hero-title);
  margin: 0 0 0.5rem;
  line-height: var(--line-height-heading, 1.2);
  letter-spacing: -0.02em;
}
.page-faq__hero-sub {
  font-family: var(--faq-font-body);
  font-size: var(--font-size-body, 16px);
  color: var(--faq-text-light);
  margin: 0;
  line-height: 1.6;
  max-width: 520px;
}
.page-faq__hero-image {
  flex-shrink: 0;
  width: 100%;
  max-width: 800px;
}
.page-faq__hero-image img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 全局容器 ---------- */
.page-faq .container {
  max-width: var(--container-max, 1200px);
  margin: 0 auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

/* ---------- 布局：左侧索引 + 右侧内容 ---------- */
.page-faq__layout {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* ---------- 左侧索引 ---------- */
.page-faq__index {
  background-color: var(--faq-card-bg);
  border: 1px solid var(--faq-border);
  padding: 1.25rem 1rem;
  position: sticky;
  top: calc(var(--header-height, 70px) + 1rem);
  align-self: flex-start;
  width: 100%;
}
.page-faq__index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.page-faq__index-link {
  display: inline-block;
  font-family: var(--faq-font-heading);
  font-size: var(--font-size-small, 14px);
  font-weight: 600;
  color: var(--faq-hero-title);
  text-decoration: none;
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--faq-border);
  transition: all var(--faq-transition);
  line-height: 1.4;
}
.page-faq__index-link:hover,
.page-faq__index-link:focus-visible {
  border-color: var(--faq-accent);
  color: var(--faq-accent);
  background-color: rgba(255, 107, 53, 0.06);
}

/* ---------- 右侧内容 ---------- */
.page-faq__content {
  flex: 1;
  min-width: 0;
}

/* ---------- Section ---------- */
.page-faq__section {
  margin-bottom: 2.5rem;
  scroll-margin-top: calc(var(--header-height, 70px) + 1.5rem);
}
.page-faq__section-title {
  font-family: var(--faq-font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--faq-hero-title);
  margin: 0 0 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--faq-accent);
  display: inline-block;
  letter-spacing: -0.01em;
}

/* ---------- 折叠面板 ---------- */
.page-faq__items {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.page-faq__item {
  background-color: var(--faq-card-bg);
  border: 1px solid var(--faq-border);
  transition: border-color var(--faq-transition);
}
.page-faq__item:hover {
  border-color: var(--faq-accent);
}

/* 隐藏 checkbox */
.page-faq__toggle {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

/* 问题标签 */
.page-faq__question {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  cursor: pointer;
  font-family: var(--faq-font-heading);
  font-size: 1rem;
  font-weight: 600;
  color: var(--faq-hero-title);
  line-height: 1.4;
  user-select: none;
  transition: background-color var(--faq-transition), color var(--faq-transition);
}
.page-faq__question:hover,
.page-faq__question:focus-visible {
  background-color: rgba(255, 107, 53, 0.04);
  color: var(--faq-accent);
}

/* + / - 图标 */
.page-faq__icon {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  font-size: 1.1rem;
  font-weight: 700;
  font-family: var(--faq-font-heading);
  color: var(--faq-accent);
  border: 1.5px solid var(--faq-accent);
  transition: transform var(--faq-transition), background-color var(--faq-transition);
  line-height: 1;
}
.page-faq__icon::before {
  content: "+";
  display: block;
  line-height: 1;
  transform: translateY(-0.04em);
}

/* checked 状态：图标变 − */
.page-faq__toggle:checked + .page-faq__question .page-faq__icon::before {
  content: "−";
}
.page-faq__toggle:checked + .page-faq__question .page-faq__icon {
  background-color: var(--faq-accent);
  color: #fff;
}

/* 答案区域：折叠动画 */
.page-faq__answer {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  padding: 0 1.25rem;
  transition: max-height 0.35s ease, opacity 0.35s ease, padding 0.35s ease;
  border-top: 0 solid var(--faq-border);
}
.page-faq__toggle:checked ~ .page-faq__answer {
  max-height: 320px;
  opacity: 1;
  padding: 1rem 1.25rem 1.25rem;
  border-top-width: 1px;
}
.page-faq__answer p {
  margin: 0 0 0.6rem;
  font-family: var(--faq-font-body);
  font-size: var(--font-size-body, 16px);
  color: var(--faq-text);
  line-height: 1.6;
}
.page-faq__answer p:last-child {
  margin-bottom: 0;
}
.page-faq__answer a {
  color: var(--faq-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--faq-transition);
}
.page-faq__answer a:hover,
.page-faq__answer a:focus-visible {
  color: #d4541f;
}

/* ---------- 装饰分隔 ---------- */
.page-faq__divider {
  text-align: center;
  padding: 1.5rem 0 0.5rem;
}
.page-faq__divider-img {
  display: inline-block;
  max-width: 100%;
  height: auto;
  opacity: 0.7;
}

/* ---------- 联系提示 ---------- */
.page-faq__contact-note {
  background-color: var(--faq-hero-bg);
  border-left: 4px solid var(--faq-accent);
  padding: 1.25rem 1.5rem;
  margin-top: 0.5rem;
}
.page-faq__contact-note p {
  margin: 0;
  font-family: var(--faq-font-body);
  font-size: var(--font-size-body, 16px);
  color: var(--faq-text);
}
.page-faq__contact-note a {
  color: var(--faq-accent);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--faq-transition);
}
.page-faq__contact-note a:hover,
.page-faq__contact-note a:focus-visible {
  color: #d4541f;
}

/* ---------- 通用图片响应 ---------- */
.page-faq img {
  max-width: 100%;
  height: auto;
}

/* ===== 桌面端 (≥768px) ===== */
@media (min-width: 768px) {
  .page-faq__hero-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    padding: 3rem 1.25rem;
  }
  .page-faq__hero-text {
    text-align: left;
    flex: 1 1 45%;
  }
  .page-faq__hero-title {
    font-size: 3rem;
  }
  .page-faq__hero-sub {
    font-size: 1.05rem;
  }
  .page-faq__hero-image {
    flex: 0 0 50%;
    max-width: 50%;
  }

  .page-faq__layout {
    flex-direction: row;
    align-items: flex-start;
    gap: 2.5rem;
  }

  .page-faq__index {
    width: 220px;
    flex-shrink: 0;
    border-width: 0 0 0 3px;
    border-color: transparent transparent transparent var(--faq-accent);
    padding: 1.5rem 0 1.5rem 1.25rem;
    background-color: transparent;
  }
  .page-faq__index-list {
    flex-direction: column;
    gap: 0.5rem;
  }
  .page-faq__index-link {
    display: block;
    border: none;
    padding: 0.5rem 0.75rem;
    font-size: var(--font-size-small, 14px);
    border-left: 2px solid transparent;
    transition: border-color var(--faq-transition), color var(--faq-transition), background-color var(--faq-transition);
  }
  .page-faq__index-link:hover,
  .page-faq__index-link:focus-visible {
    border-left-color: var(--faq-accent);
    background-color: transparent;
    color: var(--faq-accent);
  }

  .page-faq__section-title {
    font-size: 1.75rem;
  }

  .page-faq__question {
    padding: 1rem 1.5rem;
    font-size: 1.05rem;
  }
  .page-faq__answer {
    padding: 0 1.5rem;
  }
  .page-faq__toggle:checked ~ .page-faq__answer {
    padding: 1rem 1.5rem 1.25rem;
  }

  .page-faq__breadcrumb {
    padding: 1.25rem 1.25rem 0;
  }
}

/* ===== 大桌面端 (≥1024px) ===== */
@media (min-width: 1024px) {
  .page-faq__hero-inner {
    padding: 4rem 1.25rem;
  }
  .page-faq__hero-title {
    font-size: 3.5rem;
  }
  .page-faq__index {
    width: 260px;
    padding-left: 2rem;
  }
  .page-faq__index-link {
    font-size: 1rem;
    padding: 0.6rem 1rem;
  }
  .page-faq__section-title {
    font-size: 2rem;
  }
  .page-faq__question {
    padding: 1.1rem 1.75rem;
    font-size: 1.1rem;
  }
  .page-faq__answer {
    padding: 0 1.75rem;
  }
  .page-faq__toggle:checked ~ .page-faq__answer {
    padding: 1.1rem 1.75rem 1.35rem;
  }
  .page-faq__divider {
    padding: 2rem 0 1rem;
  }
}