.page-faq {
  --faq-border-thick: 6px;
  --faq-shadow: 8px 8px 0 rgba(44, 30, 19, 0.12);
  --faq-gap: var(--space-xl);
  --faq-number-size: 2.8rem;
  --faq-radius: 0;
  --faq-transition: 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --faq-bg-card: #fffcf7;
  --faq-gold-glow: 0 0 0 3px rgba(201, 169, 110, 0.35);
  background-color: var(--color-cream);
  padding: var(--space-lg) var(--space-md) var(--space-2xl);
  max-width: var(--max-width);
  margin: 0 auto;
  font-family: var(--font-body);
  color: var(--color-dark-brown);
  line-height: 1.7;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.6rem;
  font-size: 0.9rem;
  margin-bottom: var(--space-lg);
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
  color: var(--color-silver);
}
.page-faq .breadcrumb-link {
  color: var(--color-deep-blue);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}
.page-faq .breadcrumb-link:hover {
  border-bottom-color: var(--color-gold);
  color: var(--color-gold);
}
.page-faq .breadcrumb-sep {
  color: var(--color-silver);
  font-weight: 700;
}
.page-faq .breadcrumb-current {
  color: var(--color-dark-brown);
  font-weight: 600;
}

/* ---------- 标题区 ---------- */
.page-faq .faq-header {
  margin-bottom: var(--space-xl);
  border-left: var(--faq-border-thick) solid var(--color-red);
  padding-left: var(--space-lg);
}
.page-faq .faq-heading {
  font-family: var(--font-header);
  font-size: 2.6rem;
  font-weight: 900;
  color: var(--color-dark-brown);
  margin: 0 0 var(--space-sm);
  letter-spacing: -0.02em;
  line-height: 1.15;
}
.page-faq .faq-desc {
  font-size: 1.05rem;
  color: var(--color-dark-brown);
  opacity: 0.75;
  max-width: 620px;
  margin: 0;
}
.page-faq .faq-desc-link {
  color: var(--color-red);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-fast);
}
.page-faq .faq-desc-link:hover {
  color: var(--color-gold);
}

/* ---------- 筛选容器 ---------- */
.page-faq .faq-filter-container {
  position: relative;
  margin-bottom: var(--space-2xl);
}

/* ---------- 筛选标签 ---------- */
.page-faq .faq-filter-labels {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-md);
  border-bottom: 3px solid rgba(44, 30, 19, 0.08);
}
.page-faq .faq-filter-label {
  display: inline-block;
  padding: 0.45rem 1.2rem;
  font-family: var(--font-header);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  background-color: var(--color-deep-blue);
  color: var(--color-gold);
  border: var(--faq-border-thick) solid var(--color-deep-blue);
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  user-select: none;
  box-shadow: var(--shadow-medium);
}
.page-faq .faq-filter-label:hover {
  background-color: #1f3a5c;
  border-color: var(--color-gold);
  box-shadow: var(--faq-gold-glow);
}
.page-faq .faq-filter-label:focus-visible {
  outline: 3px solid var(--color-gold);
  outline-offset: 2px;
}

/* radio 选中态 via CSS ~ sibling */
#faq-all:checked ~ .faq-filter-labels label[for="faq-all"],
#faq-version:checked ~ .faq-filter-labels label[for="faq-version"],
#faq-login:checked ~ .faq-filter-labels label[for="faq-login"],
#faq-member:checked ~ .faq-filter-labels label[for="faq-member"],
#faq-data:checked ~ .faq-filter-labels label[for="faq-data"],
#faq-favorite:checked ~ .faq-filter-labels label[for="faq-favorite"] {
  background-color: var(--color-gold);
  color: var(--color-deep-blue);
  border-color: var(--color-gold);
  box-shadow: var(--faq-gold-glow);
}

/* ---------- 画廊列表 ---------- */
.page-faq .faq-gallery {
  display: flex;
  flex-direction: column;
  gap: var(--faq-gap);
}

/* ---------- 单个问答框 (details) ---------- */
.page-faq .faq-item {
  width: 88%;
  background-color: var(--faq-bg-card);
  border: var(--faq-border-thick) solid var(--color-dark-brown);
  box-shadow: var(--faq-shadow);
  transition: border-color var(--faq-transition), box-shadow var(--faq-transition), transform var(--faq-transition);
  position: relative;
  overflow: hidden;
}
/* 交替左右对齐 */
.page-faq .faq-item:nth-child(odd) {
  margin-left: 0;
  margin-right: auto;
}
.page-faq .faq-item:nth-child(even) {
  margin-left: auto;
  margin-right: 0;
}

/* 悬停发光 */
.page-faq .faq-item:hover {
  border-color: var(--color-gold);
  box-shadow: var(--faq-gold-glow), var(--faq-shadow);
  transform: translateY(-2px);
}

/* 展开时边框变金色 */
.page-faq .faq-item[open] {
  border-color: var(--color-gold);
  box-shadow: 0 0 0 4px rgba(201, 169, 110, 0.25), var(--faq-shadow);
}

/* ---------- 问题标题 (summary) ---------- */
.page-faq .faq-question {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  cursor: pointer;
  list-style: none;
  user-select: none;
  position: relative;
  background-color: transparent;
  transition: background-color var(--transition-fast);
}
.page-faq .faq-question::-webkit-details-marker {
  display: none;
}
.page-faq .faq-question:hover {
  background-color: rgba(201, 169, 110, 0.06);
}
.page-faq .faq-question:focus-visible {
  outline: 3px solid var(--color-gold);
  outline-offset: -2px;
}

/* 大号等宽编号 */
.page-faq .faq-number {
  font-family: var(--font-mono);
  font-size: var(--faq-number-size);
  font-weight: 900;
  line-height: 1;
  color: var(--color-red);
  min-width: 3.2rem;
  flex-shrink: 0;
  letter-spacing: -0.02em;
  transition: color var(--transition-fast);
}
.page-faq .faq-item[open] .faq-number {
  color: var(--color-gold);
}

/* 问题文本 */
.page-faq .faq-title-text {
  font-family: var(--font-header);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-dark-brown);
  flex: 1;
  line-height: 1.4;
  transition: color var(--transition-fast);
}
.page-faq .faq-item[open] .faq-title-text {
  color: var(--color-deep-blue);
}

/* 展开图标 */
.page-faq .faq-toggle-icon {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 300;
  color: var(--color-silver);
  flex-shrink: 0;
  transition: transform var(--faq-transition), color var(--transition-fast);
  line-height: 1;
}
.page-faq .faq-item[open] .faq-toggle-icon {
  transform: rotate(45deg);
  color: var(--color-gold);
}

/* ---------- 答案内容 ---------- */
.page-faq .faq-answer {
  padding: 0 var(--space-lg) var(--space-lg);
  border-top: 2px solid rgba(44, 30, 19, 0.06);
  margin-top: 0;
  animation: faq-slide-in 0.3s ease-out;
}
@keyframes faq-slide-in {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.page-faq .faq-answer p {
  margin: var(--space-md) 0 0;
  font-size: 1rem;
  color: var(--color-dark-brown);
  line-height: 1.75;
  max-width: 680px;
}
.page-faq .faq-answer p:first-child {
  margin-top: 0;
}

/* 答案内的图片 */
.page-faq .faq-answer-img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: var(--space-lg) 0 0;
  border: 4px solid var(--color-deep-blue);
  box-shadow: var(--shadow-heavy);
  object-fit: cover;
  object-position: center;
  background-color: #e8e2d8;
}

/* ---------- 底部号召 ---------- */
.page-faq .faq-bottom-cta {
  margin-top: var(--space-2xl);
  padding-top: var(--space-xl);
  border-top: 3px solid rgba(44, 30, 19, 0.08);
  text-align: center;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--space-md) var(--space-lg);
}
.page-faq .faq-bottom-text {
  width: 100%;
  font-family: var(--font-header);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-dark-brown);
  margin: 0 0 var(--space-sm);
}
.page-faq .faq-bottom-btn.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 2rem;
  font-family: var(--font-header);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  border-width: 4px;
  border-style: solid;
  box-shadow: var(--shadow-medium);
}
.page-faq .faq-bottom-btn.btn-primary {
  background-color: var(--color-red);
  color: #fff;
  border-color: var(--color-red);
}
.page-faq .faq-bottom-btn.btn-primary:hover {
  background-color: #c73e1a;
  border-color: var(--color-gold);
  box-shadow: var(--faq-gold-glow);
}
.page-faq .faq-bottom-btn.btn-outline {
  background-color: transparent;
  color: var(--color-dark-brown);
  border-color: var(--color-dark-brown);
}
.page-faq .faq-bottom-btn.btn-outline:hover {
  background-color: var(--color-dark-brown);
  color: var(--color-cream);
  border-color: var(--color-gold);
  box-shadow: var(--faq-gold-glow);
}

/* ---------- 筛选逻辑：显示/隐藏 ---------- */
#faq-all:checked ~ .faq-gallery .faq-item {
  display: block;
}
#faq-version:checked ~ .faq-gallery .faq-item[data-category="version"] {
  display: block;
}
#faq-version:checked ~ .faq-gallery .faq-item:not([data-category="version"]) {
  display: none;
}
#faq-login:checked ~ .faq-gallery .faq-item[data-category="login"] {
  display: block;
}
#faq-login:checked ~ .faq-gallery .faq-item:not([data-category="login"]) {
  display: none;
}
#faq-member:checked ~ .faq-gallery .faq-item[data-category="member"] {
  display: block;
}
#faq-member:checked ~ .faq-gallery .faq-item:not([data-category="member"]) {
  display: none;
}
#faq-data:checked ~ .faq-gallery .faq-item[data-category="data"] {
  display: block;
}
#faq-data:checked ~ .faq-gallery .faq-item:not([data-category="data"]) {
  display: none;
}
#faq-favorite:checked ~ .faq-gallery .faq-item[data-category="favorite"] {
  display: block;
}
#faq-favorite:checked ~ .faq-gallery .faq-item:not([data-category="favorite"]) {
  display: none;
}

/* ---------- 响应式 ---------- */
@media (max-width: 799px) {
  .page-faq {
    padding: var(--space-md) var(--space-sm) var(--space-xl);
  }
  .page-faq .faq-heading {
    font-size: 1.8rem;
  }
  .page-faq .faq-header {
    padding-left: var(--space-md);
  }
  .page-faq .faq-desc {
    font-size: 0.95rem;
  }
  .page-faq .faq-item {
    width: 100% !important;
    margin-left: 0 !important;
    margin-right: 0 !important;
  }
  .page-faq .faq-question {
    padding: var(--space-sm) var(--space-md);
    gap: var(--space-sm);
  }
  .page-faq .faq-number {
    font-size: 2rem;
    min-width: 2.4rem;
  }
  .page-faq .faq-title-text {
    font-size: 1rem;
  }
  .page-faq .faq-toggle-icon {
    font-size: 1.4rem;
  }
  .page-faq .faq-answer {
    padding: 0 var(--space-md) var(--space-md);
  }
  .page-faq .faq-filter-labels {
    gap: 0.4rem;
    padding-bottom: var(--space-sm);
  }
  .page-faq .faq-filter-label {
    padding: 0.35rem 0.9rem;
    font-size: 0.8rem;
  }
  .page-faq .faq-bottom-cta {
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
  }
  .page-faq .faq-bottom-text {
    font-size: 1.05rem;
  }
  .page-faq .faq-bottom-btn.btn {
    padding: 0.6rem 1.5rem;
    font-size: 0.9rem;
  }
}

@media (min-width: 800px) and (max-width: 1099px) {
  .page-faq .faq-item {
    width: 92%;
  }
  .page-faq .faq-number {
    font-size: 2.4rem;
    min-width: 2.8rem;
  }
  .page-faq .faq-heading {
    font-size: 2.2rem;
  }
}