/* ===== 页面专属：products ===== */
.page-products {
  --page-gutter: 1.5rem;
  --page-max-width: 1200px;
  --page-card-radius: 16px;
  --page-index-width: 200px;
  --page-step-size: 48px;
  display: block;
  width: 100%;
  max-width: var(--page-max-width);
  margin: 0 auto;
  padding: 0 var(--page-gutter) 3rem;
  color: var(--color-text-primary);
  font-family: var(--font-sans);
}

/* ===== 面包屑 ===== */
.page-products__breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1.25rem 0 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}
.page-products__breadcrumb a {
  color: var(--color-primary);
  text-decoration: none;
  transition: opacity 0.2s;
}
.page-products__breadcrumb a:hover {
  opacity: 0.8;
  text-decoration: underline;
}
.page-products__breadcrumb [aria-current="page"] {
  color: var(--color-text-secondary);
}

/* ===== 首屏 ===== */
.page-products__hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  padding: 2rem 0 2.5rem;
  border-bottom: 1px solid var(--color-border);
}
.page-products__hero-content {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.page-products__hero-title {
  font-size: clamp(2.2rem, 8vw, 3.6rem);
  font-weight: var(--font-weight-bold);
  line-height: 1.1;
  margin: 0;
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
}
.page-products__hero-subtitle {
  font-size: clamp(1rem, 3vw, 1.25rem);
  font-weight: var(--font-weight-bold);
  color: var(--color-secondary);
  margin: 0;
  letter-spacing: 0.01em;
}
.page-products__hero-summary {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0;
}
.page-products__hero-visual {
  width: 100%;
  border-radius: var(--page-card-radius);
  overflow: hidden;
  background: var(--color-card-bg);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}
.page-products__hero-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 800 / 500;
}

/* ===== 布局：索引 + 内容 ===== */
.page-products__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  padding-top: 2rem;
}

.page-products__index {
  display: none;
}
.page-products__index-sticky {
  position: sticky;
  top: calc(var(--header-height) + 1.5rem);
}
.page-products__index-heading {
  font-size: 0.75rem;
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-secondary);
  margin: 0 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-primary);
}
.page-products__index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.page-products__index-link {
  display: block;
  padding: 0.5rem 0.75rem;
  font-size: 0.9rem;
  font-weight: var(--font-weight-regular);
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: 8px;
  border-left: 3px solid transparent;
  transition: all 0.25s ease;
}
.page-products__index-link:hover,
.page-products__index-link:focus-visible {
  color: var(--color-text-primary);
  background: var(--color-card-bg);
  border-left-color: var(--color-secondary);
}

.page-products__content {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  min-width: 0;
}

/* ===== 功能卡片 ===== */
.page-products__card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  padding: 1.5rem;
  background: var(--color-card-bg);
  border-radius: var(--page-card-radius);
  border: 1px solid var(--color-border);
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.page-products__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.35);
}
.page-products__card--primary {
  border-left: 4px solid var(--color-primary);
}
.page-products__card--secondary {
  border-right: 4px solid var(--color-secondary);
}
.page-products__card-text {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.page-products__card-title {
  font-size: clamp(1.4rem, 4vw, 1.8rem);
  font-weight: var(--font-weight-bold);
  margin: 0;
  color: var(--color-text-primary);
  line-height: 1.2;
}
.page-products__card-desc {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin: 0;
}
.page-products__feature-list {
  list-style: none;
  margin: 0.25rem 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.page-products__feature-list li {
  position: relative;
  padding-left: 1.5rem;
  font-size: 0.925rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}
.page-products__feature-list li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--color-secondary);
  font-weight: var(--font-weight-bold);
}
.page-products__data-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.5rem;
  padding: 0.4rem 1rem;
  background: rgba(26, 115, 232, 0.15);
  border-radius: 20px;
  border: 1px solid rgba(26, 115, 232, 0.3);
  font-size: 0.8rem;
}
.page-products__data-chip-value {
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.page-products__data-chip-label {
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
  font-size: 0.85em;
}
.page-products__card-visual {
  width: 100%;
  border-radius: 12px;
  overflow: hidden;
  background: var(--color-bg-dark);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.05);
}
.page-products__card-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 400 / 300;
}

/* ===== 安装指南 ===== */
.page-products__install {
  padding: 2rem 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.page-products__install-title {
  font-size: clamp(1.6rem, 4vw, 2rem);
  font-weight: var(--font-weight-bold);
  margin: 0 0 0.5rem;
  color: var(--color-text-primary);
}
.page-products__install-intro {
  font-size: 1rem;
  color: var(--color-text-secondary);
  margin: 0 0 2rem;
  max-width: 500px;
}
.page-products__steps {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  counter-reset: step-counter;
}
.page-products__step {
  display: grid;
  grid-template-columns: var(--page-step-size) 1fr;
  gap: 1rem;
  align-items: start;
  padding: 0.75rem 1rem;
  background: var(--color-card-bg);
  border-radius: 12px;
  border: 1px solid var(--color-border);
  transition: background 0.25s ease;
}
.page-products__step:hover {
  background: rgba(42, 42, 62, 0.8);
}
.page-products__step-number {
  width: var(--page-step-size);
  height: var(--page-step-size);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: 50%;
  flex-shrink: 0;
}
.page-products__step-body {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.page-products__step-heading {
  font-size: 1.05rem;
  font-weight: var(--font-weight-bold);
  margin: 0;
  color: var(--color-text-primary);
}
.page-products__step-desc {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin: 0;
  line-height: 1.5;
}
.page-products__install-visual {
  margin-top: 2rem;
  border-radius: var(--page-card-radius);
  overflow: hidden;
  background: var(--color-card-bg);
  box-shadow: 0 4px 20px rgba(0,0,0,0.25);
}
.page-products__install-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 600 / 400;
}

/* ===== 相关链接 ===== */
.page-products__related {
  padding: 1.5rem 0 0.5rem;
}
.page-products__related-heading {
  font-size: 1rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-secondary);
  margin: 0 0 1rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.page-products__related-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}
.page-products__related-link {
  display: inline-block;
  padding: 0.5rem 1.25rem;
  font-size: 0.95rem;
  font-weight: var(--font-weight-regular);
  color: var(--color-primary);
  text-decoration: none;
  border: 1px solid rgba(26, 115, 232, 0.3);
  border-radius: 24px;
  transition: all 0.25s ease;
}
.page-products__related-link:hover,
.page-products__related-link:focus-visible {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* ===== 滚动显现动画 (渐进增强) ===== */
.page-products [data-observe] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1), transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}
.page-products [data-observe].fade-in {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .page-products [data-observe] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ===== 响应式 ===== */
@media (min-width: 768px) {
  .page-products {
    padding: 0 2rem 4rem;
  }
  .page-products__hero {
    grid-template-columns: 1fr 1fr;
    align-items: center;
    padding: 3rem 0 3rem;
  }
  .page-products__hero-title {
    font-size: clamp(2.4rem, 5vw, 3.6rem);
  }
  .page-products__card {
    grid-template-columns: 1fr 1fr;
    align-items: center;
    padding: 2rem;
  }
  .page-products__card--secondary .page-products__card-visual {
    order: -1;
  }
  .page-products__steps {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }
}

@media (min-width: 1024px) {
  .page-products__layout {
    grid-template-columns: var(--page-index-width) 1fr;
    gap: 3rem;
  }
  .page-products__index {
    display: block;
  }
  .page-products__breadcrumb {
    padding-top: 1.5rem;
  }
  .page-products__hero {
    padding: 4rem 0 3.5rem;
  }
  .page-products__steps {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* 确保窄屏不横向溢出 */
@media (max-width: 374px) {
  .page-products {
    padding-left: 0.75rem;
    padding-right: 0.75rem;
  }
  .page-products__hero-title {
    font-size: 1.6rem;
  }
  .page-products__card {
    padding: 1rem;
  }
  .page-products__step {
    grid-template-columns: 40px 1fr;
    gap: 0.75rem;
    padding: 0.5rem 0.75rem;
  }
  .page-products__step-number {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
}
</PAGE_CSS>