.page-faq {
  --faq-nav-width: 260px;
  --faq-gap: var(--space-xl);
  --faq-item-radius: var(--radius-lg);
  --faq-icon-size: 40px;
  --faq-nav-sticky-top: calc(var(--space-2xl) + 60px);
  display: block;
  width: 100%;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  padding: var(--space-xl) 0 var(--space-4xl);
}

/* ===== 容器复用 ===== */
.page-faq .container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  width: 100%;
  box-sizing: border-box;
}

/* ===== 面包屑 ===== */
.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm);
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
  font-family: var(--font-body);
}
.page-faq .breadcrumb a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: #FF6A33;
  text-decoration: underline;
}
.page-faq .breadcrumb-sep {
  color: var(--color-border);
  user-select: none;
}
.page-faq .breadcrumb [aria-current="page"] {
  color: var(--color-text-secondary);
  font-weight: 500;
}

/* ===== 顶部英雄区 ===== */
.page-faq .faq-hero {
  margin-bottom: var(--space-3xl);
  position: relative;
}
.page-faq .faq-hero .heading-1 {
  font-family: var(--font-heading);
  font-size: 48px;
  font-weight: 900;
  color: var(--color-text);
  margin: 0 0 var(--space-md);
  line-height: 1.1;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}
.page-faq .faq-hero-desc {
  font-size: 18px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  max-width: 640px;
  margin: 0 0 var(--space-xl);
}
.page-faq .faq-hero-img {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
}
.page-faq .faq-hero-visual {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 800 / 400;
}

/* ===== 两栏布局 ===== */
.page-faq .faq-layout {
  display: flex;
  flex-direction: column;
  gap: var(--faq-gap);
  position: relative;
}

/* ===== 左栏：问题索引 ===== */
.page-faq .faq-nav {
  flex: 0 0 auto;
  background: var(--color-surface);
  border-radius: var(--faq-item-radius);
  padding: var(--space-lg) var(--space-lg);
  border: 1px solid var(--color-border);
  position: relative;
  top: 0;
}
.page-faq .faq-nav-title {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 900;
  color: var(--color-primary);
  margin: 0 0 var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.page-faq .faq-nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}
.page-faq .faq-nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.4;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast), color var(--transition-fast);
  font-family: var(--font-body);
}
.page-faq .faq-nav-link:hover,
.page-faq .faq-nav-link:focus-visible {
  background: rgba(255, 69, 0, 0.12);
  color: var(--color-text);
}
.page-faq .faq-nav-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-border);
  flex-shrink: 0;
  transition: background var(--transition-fast);
}
.page-faq .faq-nav-link:hover .faq-nav-dot,
.page-faq .faq-nav-link:focus-visible .faq-nav-dot {
  background: var(--color-primary);
}

/* ===== 右栏：详细解答 ===== */
.page-faq .faq-content {
  flex: 1 1 auto;
  min-width: 0;
}
.page-faq .faq-content-title {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 900;
  color: var(--color-text-secondary);
  margin: 0 0 var(--space-lg);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  opacity: 0.6;
}

/* ===== 折叠项 ===== */
.page-faq .faq-item {
  background: var(--color-surface);
  border-radius: var(--faq-item-radius);
  border: 1px solid var(--color-border);
  margin-bottom: var(--space-md);
  overflow: hidden;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}
.page-faq .faq-item[open] {
  border-color: rgba(255, 69, 0, 0.35);
  box-shadow: 0 0 0 1px rgba(255, 69, 0, 0.12), var(--shadow-card);
}

.page-faq .faq-summary {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: background var(--transition-fast);
  position: relative;
}
.page-faq .faq-summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-summary:hover {
  background: rgba(255, 69, 0, 0.04);
}
.page-faq .faq-summary:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
  border-radius: var(--faq-item-radius);
}

.page-faq .faq-icon {
  width: var(--faq-icon-size);
  height: var(--faq-icon-size);
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: 6px;
  box-sizing: border-box;
  transition: transform var(--transition-fast);
}
.page-faq .faq-item[open] .faq-icon {
  transform: scale(1.05);
  border-color: var(--color-primary);
}

.page-faq .faq-question {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 900;
  color: var(--color-text);
  margin: 0;
  flex: 1 1 auto;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.page-faq .faq-indicator {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  position: relative;
  transition: transform var(--transition-base);
}
.page-faq .faq-indicator::before,
.page-faq .faq-indicator::after {
  content: '';
  position: absolute;
  background: var(--color-primary);
  border-radius: 2px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: transform var(--transition-base);
}
.page-faq .faq-indicator::before {
  width: 2px;
  height: 16px;
}
.page-faq .faq-indicator::after {
  width: 16px;
  height: 2px;
}
.page-faq .faq-item[open] .faq-indicator {
  transform: rotate(45deg);
}

/* ===== 答案区 ===== */
.page-faq .faq-answer {
  padding: 0 var(--space-lg) var(--space-lg);
  color: var(--color-text-secondary);
  font-size: 16px;
  line-height: 1.7;
  font-family: var(--font-body);
  border-top: 1px solid var(--color-border);
  margin-top: 0;
}
.page-faq .faq-answer p {
  margin: var(--space-md) 0 0;
}
.page-faq .faq-answer p:first-child {
  margin-top: var(--space-md);
}
.page-faq .faq-answer-note {
  font-size: 14px;
  color: var(--color-text-secondary);
  background: rgba(255, 69, 0, 0.06);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-primary);
  margin-top: var(--space-md) !important;
}

.page-faq .faq-contact-list {
  list-style: none;
  margin: var(--space-md) 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}
.page-faq .faq-contact-list li {
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg);
  border-radius: var(--radius-md);
  font-size: 15px;
  color: var(--color-text-secondary);
}
.page-faq .faq-contact-list li strong {
  color: var(--color-text);
  font-weight: 600;
}
.page-faq .faq-inline-link {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-fast);
}
.page-faq .faq-inline-link:hover,
.page-faq .faq-inline-link:focus-visible {
  color: #FF6A33;
}

/* ===== 滚动显现 ===== */
.page-faq [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.page-faq [data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}
.page-faq [data-reveal="fade"] {
  transform: none;
}
.page-faq [data-reveal="fade"].revealed {
  opacity: 1;
}

/* ===== 移动端优先：宽度 ≤ 767px ===== */
@media (max-width: 767px) {
  .page-faq {
    padding: var(--space-lg) 0 var(--space-3xl);
  }
  .page-faq .container {
    padding: 0 var(--space-md);
  }
  .page-faq .faq-hero .heading-1 {
    font-size: 32px;
  }
  .page-faq .faq-hero-desc {
    font-size: 16px;
  }
  .page-faq .faq-hero-img {
    border-radius: var(--radius-md);
  }
  .page-faq .faq-nav {
    padding: var(--space-md);
  }
  .page-faq .faq-nav-title {
    font-size: 16px;
    margin-bottom: var(--space-md);
  }
  .page-faq .faq-nav-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-xs);
  }
  .page-faq .faq-nav-link {
    font-size: 14px;
    padding: 6px var(--space-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pill);
    background: var(--color-bg);
  }
  .page-faq .faq-nav-dot {
    display: none;
  }
  .page-faq .faq-content-title {
    font-size: 14px;
    margin-bottom: var(--space-md);
  }
  .page-faq .faq-summary {
    padding: var(--space-sm) var(--space-md);
    gap: var(--space-sm);
    flex-wrap: nowrap;
  }
  .page-faq .faq-icon {
    width: 32px;
    height: 32px;
    padding: 4px;
  }
  .page-faq .faq-question {
    font-size: 15px;
    word-break: break-word;
  }
  .page-faq .faq-indicator {
    width: 20px;
    height: 20px;
  }
  .page-faq .faq-indicator::before {
    height: 12px;
  }
  .page-faq .faq-indicator::after {
    width: 12px;
  }
  .page-faq .faq-answer {
    padding: 0 var(--space-md) var(--space-md);
    font-size: 15px;
  }
  .page-faq .faq-answer p {
    margin-top: var(--space-sm);
  }
  .page-faq .faq-answer p:first-child {
    margin-top: var(--space-sm);
  }
  .page-faq .faq-answer-note {
    font-size: 13px;
    padding: var(--space-xs) var(--space-sm);
  }
  .page-faq .faq-contact-list li {
    font-size: 14px;
    padding: var(--space-xs) var(--space-sm);
  }
  .page-faq .faq-hero-img {
    margin: 0 calc(-1 * var(--space-md));
    border-radius: 0;
    width: calc(100% + var(--space-md) * 2);
  }
  .page-faq .faq-hero-visual {
    aspect-ratio: 800 / 400;
    width: 100%;
    height: auto;
  }
}

/* ===== 平板与桌面：宽度 ≥ 768px ===== */
@media (min-width: 768px) {
  .page-faq .faq-hero .heading-1 {
    font-size: 64px;
  }
  .page-faq .faq-hero-desc {
    font-size: 20px;
  }
  .page-faq .faq-layout {
    flex-direction: row;
    align-items: flex-start;
  }
  .page-faq .faq-nav {
    position: sticky;
    top: var(--faq-nav-sticky-top);
    width: var(--faq-nav-width);
    flex-shrink: 0;
    max-height: calc(100vh - var(--faq-nav-sticky-top) - var(--space-xl));
    overflow-y: auto;
  }
  .page-faq .faq-nav-list {
    flex-direction: column;
  }
  .page-faq .faq-nav-link {
    font-size: 15px;
    padding: var(--space-sm) var(--space-md);
    border: none;
    border-radius: var(--radius-md);
    background: transparent;
  }
  .page-faq .faq-nav-dot {
    display: inline-block;
  }
  .page-faq .faq-content {
    flex: 1 1 auto;
    min-width: 0;
  }
  .page-faq .faq-content-title {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }
  .page-faq .faq-question {
    font-size: 20px;
  }
}

/* ===== 宽桌面：宽度 ≥ 1024px ===== */
@media (min-width: 1024px) {
  .page-faq .faq-nav {
    width: 280px;
    padding: var(--space-xl);
  }
  .page-faq .faq-summary {
    padding: var(--space-lg) var(--space-xl);
  }
  .page-faq .faq-answer {
    padding: 0 var(--space-xl) var(--space-xl);
    font-size: 17px;
  }
  .page-faq .faq-icon {
    width: 44px;
    height: 44px;
    padding: 8px;
  }
}

/* ===== prefers-reduced-motion ===== */
@media (prefers-reduced-motion: reduce) {
  .page-faq [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  .page-faq .faq-indicator,
  .page-faq .faq-icon,
  .page-faq .faq-item {
    transition: none !important;
  }
  .page-faq .faq-summary:hover {
    background: transparent;
  }
}

/* ===== 暗色滚动条（可选但安全） ===== */
.page-faq .faq-nav::-webkit-scrollbar {
  width: 4px;
}
.page-faq .faq-nav::-webkit-scrollbar-track {
  background: transparent;
}
.page-faq .faq-nav::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 4px;
}
.page-faq .faq-nav {
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}