.page-faq {
  --faq-sidebar-width: 240px;
  --faq-content-max: 820px;
  --faq-card-radius: 4px;
  --faq-gap: 1.25rem;

  display: block;
  width: 100%;
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
  padding: 1rem 1rem 2.5rem;
  color: var(--color-text, #E0E0FF);
  font-family: var(--font-body, sans-serif);
  line-height: 1.6;
}

/* ---- 面包屑 ---- */
.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
  font-size: 0.8125rem;
  color: var(--color-secondary, #00BFFF);
}

.page-faq .breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.page-faq .breadcrumb__item + .breadcrumb__item::before {
  content: "▸";
  color: var(--color-border, #4B0082);
  font-size: 0.75rem;
}

.page-faq .breadcrumb__link {
  color: var(--color-secondary, #00BFFF);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s, color 0.2s;
}

.page-faq .breadcrumb__link:hover {
  border-color: var(--color-accent, #FFA500);
  color: var(--color-accent, #FFA500);
}

/* ---- 英雄区 ---- */
.page-faq .faq-hero {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-bottom: 1.75rem;
  padding-bottom: 1.25rem;
  border-bottom: 2px solid var(--color-border, #4B0082);
}

.page-faq .faq-hero__icon {
  flex-shrink: 0;
  width: 60px;
  height: 60px;
  object-fit: contain;
  image-rendering: pixelated;
  filter: drop-shadow(0 0 6px var(--color-primary, #8A2BE2));
}

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

.page-faq .faq-hero__title {
  margin: 0 0 0.3rem;
  font-family: var(--font-heading, monospace);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-heading, #FFFFFF);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.page-faq .faq-hero__desc {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-secondary, #00BFFF);
  line-height: 1.5;
}

/* ---- 搜索 ---- */
.page-faq .faq-search {
  margin-bottom: 1.75rem;
}

.page-faq .faq-search__label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-heading, #FFFFFF);
  margin-bottom: 0.4rem;
  letter-spacing: 0.05em;
}

.page-faq .faq-search__input {
  display: block;
  width: 100%;
  max-width: 480px;
  padding: 0.65rem 1rem;
  font-family: var(--font-body, sans-serif);
  font-size: 0.9375rem;
  color: var(--color-text, #E0E0FF);
  background: var(--color-surface, #1A1A3E);
  border: 2px solid var(--color-border, #4B0082);
  border-radius: 4px;
  outline: none;
  transition: border-color 0.25s, box-shadow 0.25s;
  box-sizing: border-box;
}

.page-faq .faq-search__input::placeholder {
  color: rgba(176, 176, 255, 0.5);
}

.page-faq .faq-search__input:focus {
  border-color: var(--color-primary, #8A2BE2);
  box-shadow: 0 0 0 3px rgba(138, 43, 226, 0.25);
}

/* ---- 布局 ---- */
.page-faq .faq-layout {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

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

.page-faq .faq-sidebar__title {
  margin: 0 0 0.75rem;
  font-family: var(--font-heading, monospace);
  font-size: 1.125rem;
  color: var(--color-heading, #FFFFFF);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.page-faq .faq-sidebar__list {
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-faq .faq-sidebar__item {
  margin: 0;
}

.page-faq .faq-sidebar__link {
  display: inline-block;
  padding: 0.45rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text, #E0E0FF);
  text-decoration: none;
  background: var(--color-surface, #1A1A3E);
  border: 1px solid var(--color-border, #4B0082);
  border-radius: 4px;
  transition: background 0.25s, color 0.25s, border-color 0.25s;
}

.page-faq .faq-sidebar__link:hover {
  background: var(--color-primary, #8A2BE2);
  color: #FFFFFF;
  border-color: var(--color-primary, #8A2BE2);
}

.page-faq .faq-sidebar__contact {
  margin-top: 1.5rem;
  padding: 1rem;
  background: var(--color-surface, #1A1A3E);
  border-left: 4px solid var(--color-accent, #FFA500);
  border-radius: 4px;
}

.page-faq .faq-sidebar__contact-label {
  margin: 0 0 0.65rem;
  font-size: 0.875rem;
  color: var(--color-text, #E0E0FF);
  font-weight: 600;
}

.page-faq .faq-sidebar .btn--primary {
  display: inline-block;
  padding: 0.5rem 1.25rem;
  font-family: var(--font-body, sans-serif);
  font-size: 0.8125rem;
  font-weight: 700;
  color: #FFFFFF;
  text-decoration: none;
  background: var(--color-primary, #8A2BE2);
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.25s, transform 0.15s;
}

.page-faq .faq-sidebar .btn--primary:hover {
  background: var(--color-accent, #FFA500);
  transform: translateY(-1px);
}

/* ---- 内容区 ---- */
.page-faq .faq-content {
  flex: 1;
  min-width: 0;
}

/* ---- 板块 ---- */
.page-faq .faq-section {
  margin-bottom: 2.5rem;
  scroll-margin-top: 80px;
}

.page-faq .faq-section__title {
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
  margin: 0 0 0.35rem;
  font-family: var(--font-heading, monospace);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-heading, #FFFFFF);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.page-faq .faq-section__title .note--rotated {
  font-size: 0.65rem;
  font-weight: 400;
  color: var(--color-secondary, #00BFFF);
  writing-mode: vertical-rl;
  text-orientation: mixed;
  transform: rotate(180deg);
  opacity: 0.7;
  letter-spacing: 0.1em;
}

.page-faq .faq-section__intro {
  margin: 0 0 1.25rem;
  font-size: 0.9375rem;
  color: var(--color-text, #E0E0FF);
  line-height: 1.5;
}

/* ---- 板块图片 ---- */
.page-faq .faq-section__figure {
  margin: 0 0 1.5rem;
  border: 1px solid var(--color-border, #4B0082);
  border-radius: 4px;
  overflow: hidden;
  background: var(--color-surface, #1A1A3E);
}

.page-faq .faq-section__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: contain;
  background: var(--color-dark, #0D0D2B);
}

.page-faq .faq-section__figcap {
  padding: 0.5rem 1rem;
  font-size: 0.75rem;
  color: var(--color-secondary, #00BFFF);
  background: var(--color-surface, #1A1A3E);
  border-top: 1px solid var(--color-border, #4B0082);
}

/* ---- 问答卡片 ---- */
.page-faq .faq-card {
  display: block;
  margin-bottom: 0.75rem;
  background: var(--color-surface, #1A1A3E);
  border: 1px solid var(--color-border, #4B0082);
  border-radius: var(--faq-card-radius);
  overflow: hidden;
  transition: border-color 0.25s, box-shadow 0.25s;
}

.page-faq .faq-card:hover {
  border-color: var(--color-primary, #8A2BE2);
  box-shadow: 0 0 0 1px rgba(138, 43, 226, 0.2);
}

.page-faq .faq-card__question {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.9rem 1.1rem;
  font-family: var(--font-body, sans-serif);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-heading, #FFFFFF);
  background: transparent;
  cursor: pointer;
  list-style: none;
  transition: background 0.2s, color 0.2s;
  user-select: none;
}

.page-faq .faq-card__question::-webkit-details-marker {
  display: none;
}

.page-faq .faq-card__question::before {
  content: "▸";
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.25rem;
  height: 1.25rem;
  font-size: 0.875rem;
  color: var(--color-primary, #8A2BE2);
  transition: transform 0.3s ease;
}

.page-faq .faq-card[open] .faq-card__question::before {
  transform: rotate(90deg);
}

.page-faq .faq-card__question:hover {
  background: rgba(138, 43, 226, 0.08);
}

.page-faq .faq-card__question:focus-visible {
  outline: 2px solid var(--color-accent, #FFA500);
  outline-offset: -2px;
}

.page-faq .faq-card__answer {
  padding: 0 1.1rem 1rem 2.6rem;
  font-size: 0.875rem;
  color: var(--color-text, #E0E0FF);
  line-height: 1.65;
  border-top: 1px solid var(--color-border, #4B0082);
}

.page-faq .faq-card__answer p {
  margin: 0.7rem 0;
}

.page-faq .faq-card__answer ul {
  margin: 0.5rem 0 0.7rem;
  padding-left: 1.25rem;
}

.page-faq .faq-card__answer li {
  margin-bottom: 0.3rem;
}

.page-faq .faq-card__answer a {
  color: var(--color-secondary, #00BFFF);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.2s;
}

.page-faq .faq-card__answer a:hover {
  color: var(--color-accent, #FFA500);
}

/* ---- 底部提示 ---- */
.page-faq .faq-footer-note {
  margin-top: 2rem;
  padding: 1rem 1.25rem;
  background: var(--color-surface, #1A1A3E);
  border: 1px solid var(--color-border, #4B0082);
  border-radius: 4px;
  font-size: 0.875rem;
  color: var(--color-text, #E0E0FF);
}

.page-faq .faq-footer-note a {
  color: var(--color-secondary, #00BFFF);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.page-faq .faq-footer-note a:hover {
  color: var(--color-accent, #FFA500);
}

/* ---- 桌面端 ≥ 768px ---- */
@media (min-width: 768px) {
  .page-faq {
    padding: 1.5rem 2rem 3rem;
  }

  .page-faq .faq-hero__title {
    font-size: 2.25rem;
  }

  .page-faq .faq-hero__icon {
    width: 80px;
    height: 80px;
  }

  .page-faq .faq-hero__desc {
    font-size: 1rem;
  }

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

  .page-faq .faq-sidebar {
    width: var(--faq-sidebar-width);
    position: sticky;
    top: calc(var(--header-height, 68px) + 1.5rem);
    align-self: flex-start;
  }

  .page-faq .faq-sidebar__list {
    flex-direction: column;
    gap: 0.35rem;
  }

  .page-faq .faq-sidebar__link {
    display: block;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
  }

  .page-faq .faq-content {
    max-width: var(--faq-content-max);
  }

  .page-faq .faq-section__title {
    font-size: 1.75rem;
  }

  .page-faq .faq-section__figure {
    max-width: 600px;
  }

  .page-faq .faq-card__question {
    font-size: 1rem;
    padding: 1rem 1.25rem;
  }

  .page-faq .faq-card__answer {
    padding: 0 1.25rem 1.1rem 2.8rem;
    font-size: 0.9375rem;
  }
}

/* ---- 大桌面端 ≥ 1024px ---- */
@media (min-width: 1024px) {
  .page-faq {
    padding: 2rem 2.5rem 4rem;
  }

  .page-faq .faq-hero__title {
    font-size: 2.75rem;
  }

  .page-faq .faq-layout {
    gap: 3rem;
  }

  .page-faq .faq-sidebar {
    width: 260px;
  }

  .page-faq .faq-content {
    max-width: none;
  }

  .page-faq .faq-section__title {
    font-size: 2rem;
  }
}

/* ---- 强制隐藏（搜索过滤时由 JS 控制） ---- */
.page-faq .faq-card[data-hidden="true"] {
  display: none;
}