/* ========== 页面专属 CSS：.page-faq ========== */
.page-faq {
  --faq-border: var(--border-width, 4px) solid var(--color-secondary, #003F5C);
  --faq-shadow: var(--shadow-lg, 0 6px 24px rgba(44,30,22,0.8));
  --faq-radius: var(--border-radius, 4px);
  --faq-gap: 1.25rem;
  --faq-card-bg: var(--color-white, #FDF6E3);
  --faq-answer-bg: #f5f0e0;
  --faq-accent: var(--color-accent, #00E676);
  --faq-primary: var(--color-primary, #FF6B35);
  --faq-text: var(--color-text, #2C1E16);
  --faq-gray: var(--color-gray, #607D8B);
  --faq-transition: var(--transition, 0.2s ease);

  display: block;
  max-width: var(--container-width, 1200px);
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
  font-family: var(--font-primary, system-ui, sans-serif);
  color: var(--faq-text);
  background: var(--color-background, #FDF6E3);
  line-height: 1.6;
}

/* 面包屑 */
.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.6rem;
  margin-bottom: 1.75rem;
  font-size: 0.85rem;
  font-family: var(--font-mono, monospace);
  color: var(--faq-gray);
  letter-spacing: 0.02em;
}
.page-faq .breadcrumb-link {
  color: var(--faq-primary);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--faq-transition);
}
.page-faq .breadcrumb-link:hover {
  color: var(--faq-text);
  text-decoration: underline;
}
.page-faq .breadcrumb-sep {
  color: var(--faq-gray);
  font-weight: 700;
}
.page-faq .breadcrumb-current {
  font-weight: 600;
  color: var(--faq-text);
}

/* 标题区 */
.page-faq .faq-hero {
  margin-bottom: 2rem;
  border-left: var(--border-width, 4px) solid var(--faq-primary);
  padding-left: 1.25rem;
}
.page-faq .faq-hero-title {
  font-family: var(--font-heading, system-ui, sans-serif);
  font-size: 2.25rem;
  font-weight: 800;
  font-style: italic;
  color: var(--color-secondary, #003F5C);
  margin: 0 0 0.5rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.page-faq .faq-hero-desc {
  font-size: 1rem;
  color: var(--faq-text);
  max-width: 680px;
  margin: 0;
  opacity: 0.85;
}

/* 快速索引 */
.page-faq .faq-index {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 2.5rem;
  padding: 0.75rem 0;
  border-top: 2px solid var(--faq-gray);
  border-bottom: 2px solid var(--faq-gray);
}
.page-faq .faq-index-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.9rem;
  font-size: 0.82rem;
  font-weight: 600;
  font-family: var(--font-mono, monospace);
  color: var(--color-secondary, #003F5C);
  background: transparent;
  border: var(--border-width, 4px) solid var(--color-secondary, #003F5C);
  text-decoration: none;
  transition: all var(--faq-transition);
  white-space: nowrap;
}
.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus {
  background: var(--color-secondary, #003F5C);
  color: var(--faq-card-bg);
  outline: none;
}
.page-faq .faq-index-num {
  font-weight: 700;
  color: var(--faq-primary);
  transition: color var(--faq-transition);
}
.page-faq .faq-index-link:hover .faq-index-num,
.page-faq .faq-index-link:focus .faq-index-num {
  color: var(--faq-accent);
}

/* 分区 */
.page-faq .faq-section {
  margin-bottom: 2.75rem;
  scroll-margin-top: calc(var(--header-height, 68px) + 1rem);
}
.page-faq .faq-section-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-heading, system-ui, sans-serif);
  font-size: 1.5rem;
  font-weight: 700;
  font-style: italic;
  color: var(--color-secondary, #003F5C);
  margin: 0 0 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--faq-gray);
  flex-wrap: wrap;
}
.page-faq .faq-section-icon {
  color: var(--faq-accent);
  font-size: 1.2rem;
}
.page-faq .faq-section-img {
  width: 100px;
  height: 80px;
  object-fit: cover;
  border: var(--border-width, 4px) solid var(--faq-gray);
  margin-left: auto;
  flex-shrink: 0;
  display: block;
}

/* 折叠卡片 */
.page-faq .faq-card {
  display: block;
  margin-bottom: var(--faq-gap);
  border: var(--faq-border);
  box-shadow: var(--faq-shadow);
  background: var(--faq-card-bg);
  transition: box-shadow var(--faq-transition);
  overflow: hidden;
}
.page-faq .faq-card:hover {
  box-shadow: 0 8px 32px rgba(44,30,22,0.9);
}
.page-faq .faq-card[open] {
  border-color: var(--color-secondary, #003F5C);
}

/* 问题行 (summary) */
.page-faq .faq-q {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--faq-text);
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: background var(--faq-transition);
  position: relative;
}
.page-faq .faq-q::-webkit-details-marker {
  display: none;
}
.page-faq .faq-q::marker {
  display: none;
  content: "";
}
.page-faq .faq-q:hover {
  background: rgba(0, 63, 92, 0.04);
}
.page-faq .faq-q:focus {
  outline: 2px solid var(--faq-accent);
  outline-offset: -2px;
}
.page-faq .faq-q-mark {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.8rem;
  height: 1.8rem;
  font-size: 1.1rem;
  font-weight: 800;
  font-family: var(--font-mono, monospace);
  color: var(--faq-accent);
  background: var(--color-secondary, #003F5C);
  border-radius: 50%;
  line-height: 1;
}
.page-faq .faq-q-text {
  flex: 1;
  min-width: 0;
}
.page-faq .faq-q::after {
  content: "+";
  flex-shrink: 0;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--faq-primary);
  margin-left: auto;
  transition: transform 0.25s ease;
  line-height: 1;
}
.page-faq .faq-card[open] .faq-q::after {
  content: "–";
  transform: rotate(0deg);
}

/* 答案区域 */
.page-faq .faq-a {
  padding: 1rem 1.25rem 1.5rem;
  background: var(--faq-answer-bg);
  border-top: 2px solid var(--faq-gray);
  color: var(--faq-text);
  font-size: 0.95rem;
  line-height: 1.7;
}
.page-faq .faq-a p {
  margin: 0 0 0.6rem;
}
.page-faq .faq-a p:last-child {
  margin-bottom: 0;
}
.page-faq .faq-a a {
  color: var(--faq-primary);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.page-faq .faq-a a:hover {
  color: var(--color-secondary, #003F5C);
}
.page-faq .faq-steps {
  margin: 0.6rem 0 0.8rem;
  padding-left: 1.4rem;
}
.page-faq .faq-steps li {
  margin-bottom: 0.35rem;
}
.page-faq .faq-note {
  font-size: 0.88rem;
  color: var(--faq-gray);
  font-style: italic;
}
.page-faq .faq-step-img {
  width: 150px;
  height: 300px;
  object-fit: cover;
  border: var(--border-width, 4px) solid var(--faq-gray);
  margin-top: 1rem;
  display: block;
}

/* 联系与支持卡片 */
.page-faq .faq-section-support {
  margin-top: 0.5rem;
}
.page-faq .faq-support-card {
  border: var(--faq-border);
  box-shadow: var(--faq-shadow);
  background: var(--faq-card-bg);
  padding: 1.5rem 1.5rem 1.75rem;
}
.page-faq .faq-support-intro {
  font-size: 1rem;
  margin: 0 0 1.25rem;
  font-weight: 500;
}
.page-faq .faq-support-list {
  display: grid;
  gap: 1rem;
  margin: 0;
  padding: 0;
}
.page-faq .faq-support-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0.75rem 1rem;
  border-left: var(--border-width, 4px) solid var(--faq-primary);
  background: var(--faq-answer-bg);
}
.page-faq .faq-support-label {
  font-weight: 700;
  font-size: 0.82rem;
  font-family: var(--font-mono, monospace);
  color: var(--faq-gray);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.page-faq .faq-support-value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--faq-text);
  word-break: break-all;
}
.page-faq .faq-support-note {
  font-weight: 400;
  font-size: 0.85rem;
  color: var(--faq-gray);
  font-style: italic;
}
.page-faq .faq-support-footnote {
  margin: 1.25rem 0 0;
  font-size: 0.88rem;
  color: var(--faq-gray);
  border-top: 1px solid var(--faq-gray);
  padding-top: 0.75rem;
}
.page-faq .faq-support-footnote a {
  color: var(--faq-primary);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.page-faq .faq-support-footnote a:hover {
  color: var(--color-secondary, #003F5C);
}

/* ===== 响应式：移动端优先 ===== */
@media (max-width: 640px) {
  .page-faq {
    padding: 1.25rem 1rem 2rem;
  }
  .page-faq .faq-hero-title {
    font-size: 1.7rem;
  }
  .page-faq .faq-hero-desc {
    font-size: 0.92rem;
  }
  .page-faq .faq-index {
    gap: 0.4rem;
    padding: 0.5rem 0;
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
  }
  .page-faq .faq-index-link {
    font-size: 0.75rem;
    padding: 0.3rem 0.65rem;
    white-space: nowrap;
    flex-shrink: 0;
  }
  .page-faq .faq-section-title {
    font-size: 1.2rem;
    gap: 0.4rem;
  }
  .page-faq .faq-section-img {
    width: 70px;
    height: 56px;
  }
  .page-faq .faq-q {
    padding: 0.75rem 1rem;
    font-size: 0.92rem;
    gap: 0.5rem;
  }
  .page-faq .faq-q-mark {
    width: 1.5rem;
    height: 1.5rem;
    font-size: 0.9rem;
  }
  .page-faq .faq-a {
    padding: 0.75rem 1rem 1.25rem;
    font-size: 0.9rem;
  }
  .page-faq .faq-step-img {
    width: 120px;
    height: 240px;
  }
  .page-faq .faq-support-card {
    padding: 1rem 1rem 1.25rem;
  }
  .page-faq .faq-support-item {
    padding: 0.5rem 0.75rem;
  }
  .page-faq .faq-support-value {
    font-size: 0.92rem;
    word-break: break-word;
  }
}

@media (min-width: 641px) and (max-width: 1024px) {
  .page-faq {
    padding: 1.75rem 1.5rem 2.5rem;
  }
  .page-faq .faq-hero-title {
    font-size: 2rem;
  }
  .page-faq .faq-index {
    gap: 0.5rem;
  }
  .page-faq .faq-section-title {
    font-size: 1.35rem;
  }
}

@media (min-width: 1025px) {
  .page-faq .faq-hero-title {
    font-size: 2.75rem;
  }
  .page-faq .faq-index {
    gap: 0.75rem;
    padding: 1rem 0;
  }
  .page-faq .faq-index-link {
    font-size: 0.88rem;
    padding: 0.5rem 1.2rem;
  }
  .page-faq .faq-card {
    margin-bottom: 1.5rem;
  }
  .page-faq .faq-support-list {
    grid-template-columns: 1fr 1fr;
  }
  .page-faq .faq-support-item:last-child:nth-child(odd) {
    grid-column: 1 / -1;
  }
}