.page-products {
  --page-bg: #F5F0E0;
  --page-sidebar-bg: #1A2B4C;
  --page-sidebar-text: #F5F0E0;
  --page-sidebar-accent: #FFD700;
  --page-card-bg: #FFFFFF;
  --page-card-border: #8B8680;
  --page-card-title-bg: #C04E3A;
  --page-btn-primary: #6B8E4E;
  --page-btn-primary-hover: #5A7D3E;
  --page-btn-secondary-bg: #1A2B4C;
  --page-btn-outline-border: #8B8680;
  --page-text-dark: #2C2C2C;
  --page-text-mid: #4A4A4A;
  --page-num-color: #8B8680;
  --page-shadow: 0 6px 20px rgba(0,0,0,0.12);
  --page-shadow-hover: 0 10px 32px rgba(0,0,0,0.18);
  --page-transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  display: block;
  background: var(--page-bg);
}

/* ===== 布局容器 ===== */
.page-products__inner {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ===== 侧边栏 ===== */
.page-products__sidebar {
  background: var(--page-sidebar-bg);
  color: var(--page-sidebar-text);
  padding: 1.5rem 1rem;
  display: flex;
  flex-direction: column;
  border-bottom: 6px solid var(--page-sidebar-accent);
  position: relative;
  z-index: 2;
}

.page-products__sidebar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid rgba(255, 215, 0, 0.3);
}

.page-products__sidebar-label {
  font-family: 'Oswald', 'Impact', sans-serif;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  opacity: 0.7;
}

.page-products__sidebar-count {
  font-family: 'Oswald', 'Impact', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--page-sidebar-accent);
  line-height: 1;
}

.page-products__sidebar-nav {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.page-products__sidebar-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  color: var(--page-sidebar-text);
  text-decoration: none;
  border: 2px solid transparent;
  transition: all var(--page-transition);
  font-family: 'Inter', 'Segoe UI', sans-serif;
  font-size: 0.875rem;
  font-weight: 500;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 0;
}

.page-products__sidebar-link:hover,
.page-products__sidebar-link:focus-visible {
  border-color: var(--page-sidebar-accent);
  background: rgba(255, 215, 0, 0.12);
  color: var(--page-sidebar-accent);
}

.page-products__sidebar-num {
  font-family: 'Oswald', 'Impact', sans-serif;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--page-sidebar-accent);
  opacity: 0.6;
  min-width: 1.8em;
}

.page-products__sidebar-text {
  flex: 1;
}

.page-products__sidebar-arrow {
  font-size: 1rem;
  opacity: 0;
  transform: translateX(-4px);
  transition: all var(--page-transition);
}

.page-products__sidebar-link:hover .page-products__sidebar-arrow,
.page-products__sidebar-link:focus-visible .page-products__sidebar-arrow {
  opacity: 1;
  transform: translateX(0);
}

.page-products__sidebar-footer {
  margin-top: auto;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.page-products__sidebar-tip {
  font-size: 0.75rem;
  opacity: 0.5;
  font-style: italic;
  margin: 0;
  font-family: 'Inter', 'Segoe UI', sans-serif;
}

/* ===== 内容区 ===== */
.page-products__content {
  flex: 1;
  padding: 1.5rem 1rem;
  max-width: 100%;
}

/* ===== 首屏英雄区 ===== */
.page-products__hero {
  margin-bottom: 2.5rem;
}

.page-products__hero-badge {
  display: inline-block;
  font-family: 'Oswald', 'Impact', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--page-sidebar-text);
  background: var(--page-card-title-bg);
  padding: 0.25rem 0.75rem;
  margin-bottom: 0.75rem;
  border: none;
}

.page-products__hero-title {
  font-family: 'Oswald', 'Impact', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--page-text-dark);
  line-height: 1.1;
  margin: 0 0 0.75rem 0;
  text-transform: uppercase;
}

.page-products__hero-desc {
  font-family: 'Inter', 'Segoe UI', sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--page-text-mid);
  margin: 0 0 1.25rem 0;
  max-width: 640px;
}

.page-products__hero-visual {
  width: 100%;
  border: 4px solid var(--page-card-border);
  box-shadow: var(--page-shadow);
  background: #E8E2D0;
  overflow: hidden;
}

.page-products__hero-img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 1200 / 500;
}

/* ===== 章节标题 ===== */
.page-products__section {
  margin-bottom: 2.5rem;
  scroll-margin-top: 1rem;
}

.page-products__section-header {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.page-products__section-tag {
  font-family: 'Oswald', 'Impact', sans-serif;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--page-card-title-bg);
  opacity: 0.8;
  line-height: 1;
}

.page-products__section-title {
  font-family: 'Oswald', 'Impact', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--page-text-dark);
  margin: 0;
  text-transform: uppercase;
  position: relative;
}

.page-products__section-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 48px;
  height: 4px;
  background: var(--page-card-title-bg);
}

/* ===== 卡片 ===== */
.page-products__card {
  display: flex;
  flex-direction: column;
  background: var(--page-card-bg);
  border: 4px solid var(--page-card-border);
  box-shadow: var(--page-shadow);
  transition: all var(--page-transition);
  position: relative;
}

.page-products__card:hover {
  box-shadow: var(--page-shadow-hover);
  transform: translateY(-3px);
}

.page-products__card--reverse {
  flex-direction: column;
}

.page-products__card-visual {
  width: 100%;
  overflow: hidden;
  border-bottom: 3px solid var(--page-card-border);
  background: #E8E2D0;
  position: relative;
}

.page-products__card-visual img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 400 / 300;
  transition: transform 0.5s ease;
}

.page-products__card:hover .page-products__card-visual img {
  transform: scale(1.02);
}

.page-products__card-body {
  padding: 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.page-products__card-heading {
  font-family: 'Oswald', 'Impact', sans-serif;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--page-text-dark);
  margin: 0 0 0.5rem 0;
  line-height: 1.2;
}

.page-products__card-text {
  font-family: 'Inter', 'Segoe UI', sans-serif;
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--page-text-mid);
  margin: 0 0 1rem 0;
  flex: 1;
}

.page-products__card-meta {
  display: flex;
  gap: 1.25rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.page-products__card-stat {
  font-family: 'Inter', 'Segoe UI', sans-serif;
  font-size: 0.8125rem;
  color: var(--page-text-mid);
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.page-products__num {
  font-family: 'Oswald', 'Impact', sans-serif;
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--page-num-color);
  line-height: 1;
}

/* ===== 按钮 ===== */
.page-products__card-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: 'Oswald', 'Impact', sans-serif;
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.6rem 1.5rem;
  background: var(--page-btn-primary);
  color: #FFFFFF;
  border: none;
  text-decoration: none;
  transition: all var(--page-transition);
  cursor: pointer;
  align-self: flex-start;
  border: 2px solid var(--page-btn-primary);
}

.page-products__card-btn:hover,
.page-products__card-btn:focus-visible {
  background: var(--page-btn-primary-hover);
  border-color: var(--page-btn-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(107, 142, 78, 0.35);
}

/* ===== 结尾区域 ===== */
.page-products__outro {
  margin-top: 2.5rem;
}

.page-products__outro-card {
  background: var(--page-sidebar-bg);
  border: 4px solid var(--page-sidebar-accent);
  padding: 2rem 1.5rem;
  text-align: center;
  box-shadow: var(--page-shadow);
}

.page-products__outro-icon {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
  line-height: 1;
}

.page-products__outro-title {
  font-family: 'Oswald', 'Impact', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--page-sidebar-text);
  margin: 0 0 0.5rem 0;
  text-transform: uppercase;
}

.page-products__outro-text {
  font-family: 'Inter', 'Segoe UI', sans-serif;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: rgba(245, 240, 224, 0.85);
  margin: 0 auto 1.25rem auto;
  max-width: 480px;
}

.page-products__outro-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.btn--secondary {
  background: var(--page-btn-secondary-bg);
  color: #FFFFFF;
  border: 2px solid var(--page-btn-secondary-bg);
  font-family: 'Oswald', 'Impact', sans-serif;
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.6rem 1.5rem;
  text-decoration: none;
  transition: all var(--page-transition);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn--secondary:hover,
.btn--secondary:focus-visible {
  background: #243B5E;
  border-color: #243B5E;
  transform: translateY(-2px);
}

.btn--outline {
  background: transparent;
  color: var(--page-sidebar-text);
  border: 2px solid var(--page-sidebar-text);
  font-family: 'Oswald', 'Impact', sans-serif;
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.6rem 1.5rem;
  text-decoration: none;
  transition: all var(--page-transition);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn--outline:hover,
.btn--outline:focus-visible {
  background: rgba(245, 240, 224, 0.1);
  transform: translateY(-2px);
}

/* ============================================ */
/* ===== 桌面端 (768px 及以上) ===== */
@media screen and (min-width: 768px) {
  .page-products__inner {
    flex-direction: row;
    align-items: stretch;
  }

  /* 侧边栏：固定左侧 280px */
  .page-products__sidebar {
    width: 280px;
    min-width: 280px;
    padding: 2rem 1.25rem;
    border-bottom: none;
    border-right: 6px solid var(--page-sidebar-accent);
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
  }

  .page-products__sidebar-nav {
    flex-direction: column;
    gap: 0.25rem;
  }

  .page-products__sidebar-link {
    padding: 0.75rem 1rem;
    font-size: 0.9375rem;
    background: transparent;
    border-left: 3px solid transparent;
    border-top: none;
    border-right: none;
    border-bottom: none;
    border-radius: 0;
  }

  .page-products__sidebar-link:hover,
  .page-products__sidebar-link:focus-visible {
    border-left-color: var(--page-sidebar-accent);
    background: rgba(255, 215, 0, 0.08);
  }

  .page-products__sidebar-num {
    font-size: 0.8125rem;
    min-width: 2em;
  }

  .page-products__sidebar-tip {
    font-size: 0.8125rem;
  }

  /* 内容区：自适应右侧 */
  .page-products__content {
    padding: 2.5rem 2.5rem 3rem;
    max-width: calc(100% - 280px);
  }

  .page-products__hero-title {
    font-size: 3rem;
  }

  .page-products__hero-desc {
    font-size: 1.125rem;
  }

  .page-products__section-title {
    font-size: 1.875rem;
  }

  /* 卡片：桌面左右布局 */
  .page-products__card {
    flex-direction: row;
    align-items: stretch;
  }

  .page-products__card--reverse {
    flex-direction: row-reverse;
  }

  .page-products__card-visual {
    width: 360px;
    min-width: 360px;
    border-bottom: none;
    border-right: 3px solid var(--page-card-border);
  }

  .page-products__card--reverse .page-products__card-visual {
    border-right: none;
    border-left: 3px solid var(--page-card-border);
  }

  .page-products__card-visual img {
    height: 100%;
    aspect-ratio: auto;
    object-fit: cover;
  }

  .page-products__card-body {
    padding: 1.5rem 1.75rem;
  }

  .page-products__card-heading {
    font-size: 1.25rem;
  }

  .page-products__card-text {
    font-size: 1rem;
  }

  .page-products__outro-card {
    padding: 2.5rem 2rem;
  }

  .page-products__outro-title {
    font-size: 1.75rem;
  }

  .page-products__outro-text {
    font-size: 1rem;
  }
}

/* ============================================ */
/* ===== 大桌面端 (1200px 及以上) ===== */
@media screen and (min-width: 1200px) {
  .page-products__sidebar {
    width: 320px;
    min-width: 320px;
    padding: 2.5rem 1.5rem;
  }

  .page-products__content {
    padding: 3rem 3.5rem 4rem;
    max-width: calc(100% - 320px);
  }

  .page-products__hero-title {
    font-size: 3.5rem;
  }

  .page-products__card-visual {
    width: 420px;
    min-width: 420px;
  }

  .page-products__card-body {
    padding: 1.75rem 2rem;
  }

  .page-products__section {
    margin-bottom: 3rem;
  }

  .page-products__outro-card {
    padding: 3rem 2.5rem;
  }
}

/* ============================================ */
/* ===== 窄屏下的滚动修正 ===== */
@media screen and (max-width: 767px) {
  .page-products__hero-img {
    aspect-ratio: 1200 / 500;
    max-height: 220px;
    object-fit: cover;
  }

  .page-products__card-visual img {
    max-height: 220px;
    object-fit: cover;
  }

  .page-products__sidebar-nav {
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    padding-bottom: 0.5rem;
    margin-bottom: 0.5rem;
  }

  .page-products__sidebar-nav::-webkit-scrollbar {
    height: 3px;
  }

  .page-products__sidebar-nav::-webkit-scrollbar-track {
    background: rgba(255,255,255,0.05);
  }

  .page-products__sidebar-nav::-webkit-scrollbar-thumb {
    background: var(--page-sidebar-accent);
    border-radius: 0;
  }

  .page-products__sidebar-link {
    white-space: nowrap;
    flex-shrink: 0;
  }
}

/* ============================================ */
/* ===== 焦点与可访问性 ===== */
.page-products__sidebar-link:focus-visible,
.page-products__card-btn:focus-visible,
.btn--secondary:focus-visible,
.btn--outline:focus-visible {
  outline: 3px solid var(--page-sidebar-accent);
  outline-offset: 2px;
}

/* ===== 数据属性高亮（渐进增强） ===== */
.page-products__sidebar-link[data-active="true"] {
  border-color: var(--page-sidebar-accent);
  background: rgba(255, 215, 0, 0.15);
  color: var(--page-sidebar-accent);
}

.page-products__sidebar-link[data-active="true"] .page-products__sidebar-num {
  opacity: 1;
  color: var(--page-sidebar-accent);
}

/* ===== 响应式图片安全 ===== */
.page-products img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ===== 打印优化 ===== */
@media print {
  .page-products__sidebar {
    display: none;
  }
  .page-products__content {
    max-width: 100%;
    padding: 1rem;
  }
  .page-products__card {
    break-inside: avoid;
    box-shadow: none;
    border-color: #ccc;
  }
  .page-products__hero-visual {
    box-shadow: none;
    border-color: #ccc;
  }
}
<<<PAGE_JS>>>
document.addEventListener('DOMContentLoaded', function() {
  var sidebarLinks = document.querySelectorAll('.page-products__sidebar-link[data-section]');
  var sections = document.querySelectorAll('[data-section-block]');

  function updateActiveLink() {
    var scrollPos = window.scrollY + 120;
    var activeId = null;

    sections.forEach(function(section) {
      var rect = section.getBoundingClientRect();
      var absoluteTop = rect.top + window.scrollY;
      if (scrollPos >= absoluteTop && scrollPos < absoluteTop + rect.height + 100) {
        activeId = section.getAttribute('id');
      }
    });

    sidebarLinks.forEach(function(link) {
      var target = link.getAttribute('data-section');
      if (target === activeId) {
        link.setAttribute('data-active', 'true');
      } else {
        link.removeAttribute('data-active');
      }
    });
  }

  if (sections.length > 0 && sidebarLinks.length > 0) {
    updateActiveLink();
    window.addEventListener('scroll', updateActiveLink, { passive: true });
  }
});