/* ===== 应用中心页面专属样式 ===== */
.page-products {
  --card-radius: 0;
  --card-border-width: 2px;
  --focus-ring: 0 0 0 3px rgba(212, 175, 55, 0.4);
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
  padding: var(--space-lg, 2rem) var(--space-md, 1rem);
  color: var(--color-text, #2D2D2D);
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
}

/* 面包屑 */
.page-products .breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-xs, 0.25rem);
  margin-bottom: var(--space-lg, 2rem);
  font-size: var(--fs-small, 0.75rem);
  color: var(--color-text-light, #8C8C8C);
}
.page-products .breadcrumb-link {
  color: var(--color-accent, #D4AF37);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-fast, 0.2s);
}
.page-products .breadcrumb-link:hover {
  border-bottom-color: var(--color-accent, #D4AF37);
}
.page-products .breadcrumb-separator {
  margin: 0 var(--space-xs, 0.25rem);
}
.page-products .breadcrumb-current {
  font-weight: var(--fw-bold, 900);
  color: var(--color-text, #2D2D2D);
}

/* 页面标题 */
.page-products .page-title {
  font-family: var(--font-heading, 'Noto Sans SC', sans-serif);
  font-size: var(--fs-heading, clamp(1.5rem, 4vw, 3rem));
  font-weight: var(--fw-bold, 900);
  color: var(--color-accent, #D4AF37);
  margin: 0 0 var(--space-sm, 0.5rem);
  line-height: 1.1;
}
.page-products .page-subtitle {
  font-size: var(--fs-body, 1rem);
  color: var(--color-text-light, #8C8C8C);
  margin: 0 0 var(--space-xl, 4rem);
  max-width: 40ch;
}

/* 筛选栏 */
.page-products .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm, 0.5rem);
  margin-bottom: var(--space-lg, 2rem);
}
.page-products .filter-btn {
  background: transparent;
  border: 1px solid var(--color-border, #4A4A4A);
  color: var(--color-text-light, #8C8C8C);
  padding: var(--space-xs, 0.25rem) var(--space-md, 1rem);
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
  font-size: var(--fs-small, 0.75rem);
  cursor: pointer;
  transition: background-color var(--transition-fast, 0.2s), color var(--transition-fast, 0.2s), border-color var(--transition-fast, 0.2s);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.page-products .filter-btn:hover,
.page-products .filter-btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring, 0 0 0 3px rgba(212, 175, 55, 0.4));
}
.page-products .filter-btn.active {
  background-color: var(--color-cta, #FF6B35);
  color: var(--color-white, #FFFFFF);
  border-color: var(--color-cta, #FF6B35);
}

/* 服务一览网格 */
.page-products .section-heading {
  font-family: var(--font-heading, 'Noto Sans SC', sans-serif);
  font-weight: var(--fw-bold, 900);
  font-size: clamp(1.2rem, 2.5vw, 1.8rem);
  color: var(--color-accent, #D4AF37);
  margin: var(--space-xl, 4rem) 0 var(--space-lg, 2rem);
  border-left: 4px solid var(--color-accent, #D4AF37);
  padding-left: var(--space-md, 1rem);
}
.page-products .cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg, 2rem);
}

/* 卡片基础 */
.page-products .card {
  background-color: var(--color-card-bg, #1A2A4A);
  border: var(--card-border-width) solid var(--color-border, #4A4A4A);
  border-radius: var(--card-radius);
  padding: var(--space-lg, 2rem);
  transition: border-color var(--transition-slow, 0.4s), box-shadow var(--transition-slow, 0.4s);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  cursor: default;
  position: relative;
  overflow: hidden;
}
.page-products .card:focus-within {
  outline: none;
  box-shadow: var(--focus-ring);
}
.page-products .card:hover {
  border-color: var(--color-accent, #D4AF37);
  box-shadow: 0 4px 20px rgba(212, 175, 55, 0.15);
}
.page-products .card-image-wrapper {
  flex-shrink: 0;
  margin-bottom: var(--space-md, 1rem);
  background: var(--color-primary, #0A192F);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 120px;
  aspect-ratio: auto;
}
.page-products .card-image {
  display: block;
  max-width: 100%;
  height: auto;
  object-fit: contain;
}
.page-products .card-title {
  font-family: var(--font-heading, 'Noto Sans SC', sans-serif);
  font-weight: var(--fw-bold, 900);
  font-size: 1.25rem;
  color: var(--color-accent, #D4AF37);
  margin: 0 0 var(--space-sm, 0.5rem);
}
.page-products .card-summary {
  font-size: var(--fs-body, 1rem);
  color: var(--color-text-light, #8C8C8C);
  margin: 0 0 var(--space-md, 1rem);
}
.page-products .card-detail {
  display: none;
  font-size: var(--fs-small, 0.75rem);
  color: var(--color-text, #2D2D2D);
  line-height: 1.6;
  margin-bottom: var(--space-md, 1rem);
  padding: var(--space-sm, 0.5rem) 0;
  border-top: 1px solid var(--color-border, #4A4A4A);
}
.page-products .card.detail-open .card-detail {
  display: block;
}
.page-products .card-expand-btn {
  background: transparent;
  border: 1px solid var(--color-accent, #D4AF37);
  color: var(--color-accent, #D4AF37);
  padding: var(--space-xs, 0.25rem) var(--space-md, 1rem);
  font-size: var(--fs-small, 0.75rem);
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
  cursor: pointer;
  transition: background-color var(--transition-fast, 0.2s), color var(--transition-fast, 0.2s);
  margin-top: auto;
  align-self: flex-start;
}
.page-products .card-expand-btn:hover,
.page-products .card-expand-btn:focus-visible {
  background-color: var(--color-accent, #D4AF37);
  color: var(--color-primary, #0A192F);
  outline: none;
}

/* 卡片尺寸变体 */
.page-products .card-lg {
  grid-column: 1 / -1;
}
.page-products .card-tall {
  grid-row: span 2; /* 只在多列时有用 */
}

/* 使用指引区域 */
.page-products .guide-section {
  margin-top: var(--space-xl, 4rem);
  padding: var(--space-lg, 2rem);
  background-color: var(--color-light-bg, #F5F0EB);
  border: var(--card-border-width) solid var(--color-border, #4A4A4A);
}
.page-products .guide-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-md, 1rem);
}
.page-products .guide-text {
  font-size: var(--fs-body, 1rem);
  line-height: 1.7;
  color: var(--color-text, #2D2D2D);
  max-width: 60ch;
}
.page-products .guide-links {
  display: flex;
  gap: var(--space-sm, 0.5rem);
  flex-wrap: wrap;
}
.page-products .guide-links .btn {
  text-decoration: none;
  display: inline-block;
  padding: var(--space-sm, 0.5rem) var(--space-lg, 2rem);
  font-size: var(--fs-small, 0.75rem);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: 1px solid var(--color-border, #4A4A4A);
  background: transparent;
  color: var(--color-text, #2D2D2D);
  transition: background-color var(--transition-fast, 0.2s), color var(--transition-fast, 0.2s);
}
.page-products .guide-links .btn:hover,
.page-products .guide-links .btn:focus-visible {
  background-color: var(--color-accent, #D4AF37);
  color: var(--color-primary, #0A192F);
  border-color: var(--color-accent, #D4AF37);
}
.page-products .guide-links .btn-primary {
  background-color: var(--color-cta, #FF6B35);
  color: var(--color-white, #FFFFFF);
  border-color: var(--color-cta, #FF6B35);
}
.page-products .guide-links .btn-primary:hover {
  background-color: var(--color-accent, #D4AF37);
  border-color: var(--color-accent, #D4AF37);
}

/* 版本兼容区域 */
.page-products .compatibility-section {
  margin-top: var(--space-xl, 4rem);
}
.page-products .compat-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg, 2rem);
}
.page-products .compat-icon {
  width: 100%;
  max-width: 300px;
  margin: 0 auto;
  border: var(--card-border-width) solid var(--color-border, #4A4A4A);
  overflow: hidden;
  background: var(--color-primary, #0A192F);
}
.page-products .compat-bg-img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-products .compat-text {
  font-size: var(--fs-body, 1rem);
  line-height: 1.7;
  color: var(--color-text, #2D2D2D);
}
.page-products .compat-text a {
  color: var(--color-accent, #D4AF37);
  text-decoration: underline;
  transition: color var(--transition-fast, 0.2s);
}
.page-products .compat-text a:hover {
  color: var(--color-cta, #FF6B35);
}
.page-products .compat-note {
  margin-top: var(--space-sm, 0.5rem);
  color: var(--color-text-light, #8C8C8C);
  font-size: var(--fs-small, 0.75rem);
}

/* 响应式：桌面 */
@media (min-width: 768px) {
  .page-products .cards-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl, 4rem);
  }
  .page-products .card-lg {
    grid-column: 1 / 3;
  }
  .page-products .card-tall {
    grid-row: span 2;
  }
  .page-products .card-image-wrapper {
    max-width: 160px;
  }
  .page-products .compat-content {
    flex-direction: row;
    align-items: flex-start;
  }
  .page-products .compat-icon {
    flex: 0 0 300px;
    margin: 0;
  }
  .page-products .guide-content {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
  .page-products .guide-text {
    flex: 1;
  }
  .page-products .guide-links {
    flex: 0 0 auto;
  }
}