.page-faq {
  --faq-hero-min-h: 420px;
  --faq-card-radius: 12px;
  --faq-border-w: 3px;
  --faq-gap: 1.25rem;
  --faq-grid-gap: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0;
  color: var(--c-text);
  font-family: var(--font-body);
  background: var(--c-bg);
}

/* ===== 面包屑 ===== */
.page-faq__breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--c-text-muted);
  margin-bottom: 1rem;
}
.page-faq__breadcrumb a {
  color: var(--c-primary);
  text-decoration: none;
  transition: color 0.2s;
}
.page-faq__breadcrumb a:hover {
  color: var(--c-accent);
}
.page-faq__breadcrumb-sep {
  color: var(--c-text-muted);
  opacity: 0.5;
}

/* ===== Hero 框景区域 ===== */
.page-faq__hero {
  position: relative;
  min-height: var(--faq-hero-min-h);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border: var(--faq-border-w) solid var(--c-border);
  border-radius: var(--faq-card-radius);
  margin: 1rem var(--gap) 0;
  background: var(--c-card);
}
.page-faq__hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.25;
}
.page-faq__hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.page-faq__hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 3rem 1.5rem;
  max-width: 720px;
  width: 100%;
}
.page-faq__title {
  font-family: var(--font-heading);
  font-size: clamp(2.8rem, 8vw, 5.5rem);
  line-height: 1.05;
  color: var(--c-text);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin: 0 0 0.5rem;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.page-faq__subtitle {
  font-size: 1.15rem;
  color: var(--c-text-muted);
  margin: 0 0 1.75rem;
  font-weight: 400;
}
.page-faq__search {
  position: relative;
  max-width: 500px;
  margin: 0 auto;
}
.page-faq__search-input {
  width: 100%;
  padding: 0.85rem 1.25rem 0.85rem 3rem;
  border: var(--faq-border-w) solid var(--c-border);
  border-radius: 50px;
  background: rgba(13, 13, 13, 0.8);
  color: var(--c-text);
  font-size: 1rem;
  font-family: var(--font-body);
  outline: none;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.page-faq__search-input::placeholder {
  color: var(--c-text-muted);
  opacity: 0.7;
}
.page-faq__search-input:focus {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.25);
}
.page-faq__search-icon {
  position: absolute;
  left: 1.15rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.3rem;
  color: var(--c-primary);
  pointer-events: none;
  font-weight: 700;
}

/* ===== 分类标签 ===== */
.page-faq__categories {
  padding: 2rem var(--gap) 0.5rem;
}
.page-faq__category-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
  justify-content: center;
}
.page-faq__category-btn {
  padding: 0.6rem 1.5rem;
  border: var(--faq-border-w) solid var(--c-border);
  border-radius: 50px;
  background: transparent;
  color: var(--c-text-muted);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s ease;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.page-faq__category-btn:hover {
  border-color: var(--c-primary);
  color: var(--c-primary);
}
.page-faq__category-btn[aria-selected="true"] {
  background: var(--gradient);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
}

/* ===== 问题列表网格 ===== */
.page-faq__list {
  padding: 1rem var(--gap) 3rem;
}
.page-faq__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-grid-gap);
}
.page-faq__group {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.page-faq__group-title {
  font-family: var(--font-heading);
  font-size: 1.65rem;
  color: var(--c-primary);
  margin: 0 0 0.25rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--c-border);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.page-faq__items {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* ===== 单个问答卡片（手风琴） ===== */
.page-faq__item {
  border: var(--faq-border-w) solid var(--c-border);
  border-radius: var(--faq-card-radius);
  background: var(--c-card);
  overflow: hidden;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.page-faq__item:hover {
  border-color: var(--c-primary);
  box-shadow: 0 0 15px rgba(0, 212, 255, 0.15);
}
.page-faq__item[open] {
  border-color: var(--c-primary);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
}
.page-faq__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--c-text);
  cursor: pointer;
  list-style: none;
  transition: background 0.2s;
}
.page-faq__question::-webkit-details-marker {
  display: none;
}
.page-faq__question::marker {
  display: none;
  content: "";
}
.page-faq__question:hover {
  background: rgba(0, 212, 255, 0.05);
}
.page-faq__icon {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--gradient);
  color: #fff;
  font-size: 1.4rem;
  font-weight: 700;
  transition: transform 0.35s ease;
  line-height: 1;
}
.page-faq__item[open] .page-faq__icon {
  transform: rotate(45deg);
}
.page-faq__answer {
  padding: 0 1.25rem 1.25rem;
  color: var(--c-text-muted);
  line-height: 1.7;
  font-size: 0.975rem;
  border-top: 1px solid var(--c-border);
  padding-top: 1rem;
  margin-top: 0;
}
.page-faq__answer p {
  margin: 0 0 0.75rem;
}
.page-faq__answer p:last-child {
  margin-bottom: 0;
}
.page-faq__answer-img {
  margin-top: 1rem;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--c-border);
}
.page-faq__answer-img img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* ===== 联系方式卡片 ===== */
.page-faq__contact {
  padding: 0 var(--gap) 3rem;
}
.page-faq__contact-card {
  text-align: center;
  padding: 2.5rem 2rem;
  border: var(--faq-border-w) solid var(--c-border);
  border-radius: var(--faq-card-radius);
  background: var(--c-card);
  background-image: radial-gradient(circle at 20% 30%, rgba(0, 212, 255, 0.08) 0%, transparent 60%);
}
.page-faq__contact-title {
  font-family: var(--font-heading);
  font-size: 2rem;
  color: var(--c-text);
  margin: 0 0 0.5rem;
  text-transform: uppercase;
}
.page-faq__contact-desc {
  color: var(--c-text-muted);
  font-size: 1rem;
  margin: 0 0 1.75rem;
}
.page-faq__contact-methods {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: center;
  align-items: center;
}
.page-faq__contact-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
}
.page-faq__contact-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--c-text-muted);
  opacity: 0.7;
}
.page-faq__contact-value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--c-primary);
  text-decoration: none;
  transition: color 0.2s;
}
.page-faq__contact-value:hover {
  color: var(--c-accent);
}
.page-faq__contact-link {
  font-size: 0.95rem;
  padding: 0.6rem 1.75rem;
  border-radius: 50px;
}

/* ===== CTA 按钮 ===== */
.cta-btn {
  display: inline-block;
  background: var(--gradient);
  color: #fff;
  font-family: var(--font-body);
  font-weight: 700;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: transform 0.25s, box-shadow 0.3s;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.cta-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.35);
}

/* ===== 工具栏 ===== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.card--glow {
  box-shadow: 0 0 0 1px var(--c-border), 0 4px 20px rgba(0, 0, 0, 0.5);
}

/* ===== 响应式：平板及以上 ===== */
@media (min-width: 768px) {
  .page-faq__hero {
    margin: 1.5rem 2rem 0;
    min-height: 460px;
  }
  .page-faq__hero-content {
    padding: 4rem 2.5rem;
  }
  .page-faq__categories {
    padding: 2.5rem 2rem 1rem;
  }
  .page-faq__list {
    padding: 1.5rem 2rem 4rem;
  }
  .page-faq__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--faq-grid-gap) 2rem;
  }
  .page-faq__group-title {
    font-size: 1.85rem;
  }
  .page-faq__contact {
    padding: 0 2rem 4rem;
  }
  .page-faq__contact-card {
    padding: 3rem 3.5rem;
  }
  .page-faq__contact-methods {
    gap: 2.5rem;
  }
}

/* ===== 响应式：桌面 ===== */
@media (min-width: 1024px) {
  .page-faq__hero {
    margin: 2rem auto 0;
    max-width: var(--content-w);
    min-height: 480px;
    border-width: 4px;
  }
  .page-faq__hero-content {
    padding: 5rem 3rem;
  }
  .page-faq__categories {
    max-width: var(--content-w);
    margin: 0 auto;
    padding: 3rem 0 1.5rem;
  }
  .page-faq__list {
    max-width: var(--content-w);
    margin: 0 auto;
    padding: 2rem 0 5rem;
  }
  .page-faq__grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem 3rem;
  }
  .page-faq__group-title {
    font-size: 2rem;
  }
  .page-faq__question {
    padding: 1.15rem 1.5rem;
    font-size: 1.1rem;
  }
  .page-faq__answer {
    padding: 0 1.5rem 1.5rem;
    font-size: 1rem;
  }
  .page-faq__contact {
    max-width: var(--content-w);
    margin: 0 auto;
    padding: 0 0 5rem;
  }
  .page-faq__contact-card {
    padding: 3.5rem 4rem;
  }
  .page-faq__contact-title {
    font-size: 2.4rem;
  }
}

/* ===== 大屏优化 ===== */
@media (min-width: 1400px) {
  .page-faq__grid {
    grid-template-columns: 1fr 1fr;
    gap: 3rem 4rem;
  }
}
</PAGE_CSS>