/* ===== 页面专属：.page-faq ===== */
.page-faq {
  --faq-bg-card: var(--color-surface);
  --faq-border: var(--border-thick) solid rgba(0, 191, 255, 0.25);
  --faq-border-open: var(--border-thick) solid var(--color-secondary);
  --faq-glow: 0 0 24px rgba(0, 191, 255, 0.12);
  --faq-radius: var(--radius-md);
  --faq-gap: 1.25rem;
  --faq-hero-min-h: clamp(180px, 28vh, 320px);
  --faq-cat-icon-size: 40px;
  display: block;
  width: 100%;
}

/* 面包屑 */
.faq-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}
.faq-breadcrumb a {
  color: var(--color-secondary);
  text-decoration: none;
  transition: color var(--transition);
}
.faq-breadcrumb a:hover {
  color: var(--color-accent);
}
.faq-breadcrumb-sep {
  color: rgba(255, 255, 255, 0.25);
  font-size: 0.75rem;
}
.faq-breadcrumb-current {
  color: var(--color-text);
  font-weight: 500;
}

/* 英雄区 */
.faq-hero {
  min-height: var(--faq-hero-min-h);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 1.5rem 0 1rem;
  border-bottom: var(--border-thick) solid rgba(255, 42, 42, 0.3);
  margin-bottom: 1.75rem;
}
.faq-hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5.5vw, 3.25rem);
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 0 0 0.5rem;
  line-height: 1.15;
  text-shadow: 0 0 20px rgba(255, 42, 42, 0.18);
}
.faq-hero-lead {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 0 0 1.25rem;
  line-height: 1.6;
}

/* 搜索框 */
.faq-search-wrap {
  position: relative;
  max-width: 520px;
  width: 100%;
}
.faq-search-input {
  display: block;
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.75rem;
  background: var(--faq-bg-card);
  border: var(--border-thick) solid rgba(0, 191, 255, 0.25);
  border-radius: var(--faq-radius);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
.faq-search-input::placeholder {
  color: var(--color-text-secondary);
  opacity: 0.7;
}
.faq-search-input:focus {
  border-color: var(--color-secondary);
  box-shadow: 0 0 20px rgba(0, 191, 255, 0.15);
}
.faq-search-icon {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-secondary);
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 分类标签栏 */
.faq-categories {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.5rem;
  overflow-x: auto;
  padding: 0.5rem 0 1rem;
  scrollbar-width: thin;
  scrollbar-color: var(--color-secondary) transparent;
  -webkit-overflow-scrolling: touch;
  margin-bottom: 1rem;
}
.faq-categories::-webkit-scrollbar {
  height: 4px;
}
.faq-categories::-webkit-scrollbar-track {
  background: transparent;
}
.faq-categories::-webkit-scrollbar-thumb {
  background: var(--color-secondary);
  border-radius: 4px;
}
.faq-cat-btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 1rem 0.45rem 0.65rem;
  background: var(--faq-bg-card);
  border: var(--border-thick) solid rgba(0, 191, 255, 0.15);
  border-radius: 100px;
  color: var(--color-text-secondary);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.faq-cat-btn:hover {
  border-color: rgba(0, 191, 255, 0.5);
  color: var(--color-text);
  background: rgba(0, 191, 255, 0.06);
}
.faq-cat-btn.is-active {
  border-color: var(--color-secondary);
  color: var(--color-text);
  background: rgba(0, 191, 255, 0.12);
  box-shadow: 0 0 18px rgba(0, 191, 255, 0.10);
}
.faq-cat-icon {
  width: var(--faq-cat-icon-size);
  height: var(--faq-cat-icon-size);
  border-radius: 4px;
  object-fit: cover;
  flex-shrink: 0;
}

/* 问答组 */
.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 2.25rem;
  padding-bottom: 1.5rem;
}
.faq-group {
  border-left: 3px solid rgba(255, 215, 0, 0.25);
  padding-left: 1rem;
}
.faq-group-title {
  font-family: var(--font-heading);
  font-size: clamp(1.2rem, 3vw, 1.65rem);
  font-weight: 700;
  color: var(--color-accent);
  margin: 0 0 1rem;
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.faq-group-title::after {
  content: '';
  flex: 1;
  height: 2px;
  background: linear-gradient(90deg, rgba(255, 215, 0, 0.3), transparent);
  margin-left: 0.5rem;
}

/* 单个问答项 */
.faq-item {
  display: block;
  margin-bottom: 0.75rem;
  background: var(--faq-bg-card);
  border: var(--faq-border);
  border-radius: var(--faq-radius);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.faq-item[open] {
  border-color: var(--color-secondary);
  box-shadow: var(--faq-glow);
}
.faq-question {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.9rem 1rem 0.9rem 1.25rem;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  user-select: none;
  list-style: none;
  position: relative;
  transition: background var(--transition);
}
.faq-question::-webkit-details-marker {
  display: none;
}
.faq-question::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-right: 2px solid var(--color-accent);
  border-bottom: 2px solid var(--color-accent);
  transform: rotate(-45deg);
  flex-shrink: 0;
  transition: transform var(--transition);
  margin-right: 0.25rem;
}
.faq-item[open] .faq-question::before {
  transform: rotate(45deg);
}
.faq-question:hover {
  background: rgba(0, 191, 255, 0.04);
}
.faq-item[open] .faq-question {
  border-bottom: 1px solid rgba(0, 191, 255, 0.12);
}
.faq-answer {
  padding: 1rem 1.25rem 1.25rem;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}
.faq-answer p {
  margin: 0 0 0.75rem;
}
.faq-answer p:last-child {
  margin-bottom: 0;
}

/* 答案中的截图 */
.faq-figure {
  margin: 0.75rem 0 0;
  max-width: 100%;
}
.faq-screenshot {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: calc(var(--radius-sm) + 2px);
  border: 2px solid rgba(0, 191, 255, 0.18);
  background: var(--color-bg);
}
.faq-figcaption {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-top: 0.4rem;
  font-style: italic;
  opacity: 0.8;
}

/* 链接 */
.faq-link {
  color: var(--color-secondary);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition);
}
.faq-link:hover {
  color: var(--color-accent);
  text-decoration: none;
}

/* 底部额外 */
.faq-footer-extra {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 2px solid rgba(255, 215, 0, 0.15);
}
.faq-extra-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  background: var(--faq-bg-card);
  border: var(--border-thick) solid rgba(255, 215, 0, 0.18);
  border-radius: var(--faq-radius);
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  flex-wrap: wrap;
}
.faq-extra-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  flex-shrink: 0;
}

/* ===== 移动端优先 基础 ===== */
.main-content.faq-layout {
  max-width: 840px;
  margin-left: auto;
  margin-right: auto;
  padding: 1.5rem 1rem 2.5rem;
  width: 100%;
  box-sizing: border-box;
}

/* ===== 桌面端 ≥768px ===== */
@media (min-width: 768px) {
  .main-content.faq-layout {
    padding: 2rem 1.5rem 3rem;
  }
  .faq-hero {
    padding: 2rem 0 1.25rem;
    margin-bottom: 2rem;
  }
  .faq-categories {
    gap: 0.75rem;
    padding: 0.75rem 0 1.25rem;
  }
  .faq-cat-btn {
    padding: 0.55rem 1.25rem 0.55rem 0.85rem;
    font-size: 0.9rem;
  }
  .faq-group {
    padding-left: 1.5rem;
  }
  .faq-answer {
    padding: 1.25rem 1.5rem 1.5rem;
    font-size: 1rem;
  }
  .faq-question {
    padding: 1rem 1.25rem 1rem 1.5rem;
    font-size: 1.05rem;
  }
  .faq-extra-card {
    padding: 1.25rem 1.5rem;
    font-size: 1rem;
  }
}

/* ===== 宽桌面 ≥1024px ===== */
@media (min-width: 1024px) {
  .main-content.faq-layout {
    padding: 2.5rem 2rem 4rem;
  }
  .faq-hero-title {
    font-size: 3.5rem;
  }
  .faq-accordion {
    gap: 2.75rem;
  }
}

/* ===== 极窄屏兼容 ===== */
@media (max-width: 420px) {
  .faq-cat-btn {
    font-size: 0.78rem;
    padding: 0.35rem 0.7rem 0.35rem 0.45rem;
  }
  .faq-cat-icon {
    width: 32px;
    height: 32px;
  }
  .faq-question {
    font-size: 0.9rem;
    padding: 0.75rem 0.75rem 0.75rem 1rem;
  }
  .faq-answer {
    font-size: 0.88rem;
    padding: 0.75rem 1rem 1rem;
  }
  .faq-hero-title {
    font-size: 1.75rem;
  }
  .faq-search-input {
    padding: 0.6rem 0.75rem 0.6rem 2.4rem;
    font-size: 0.88rem;
  }
}