/* ===== 页面专属：page-products ===== */
.page-products {
  --products-accent: var(--color-brand-accent);
  --products-glow: 0 0 12px rgba(211,47,47,0.35);
  --products-node-size: 5rem;
  --products-node-gap: 1.25rem;
  background-color: var(--color-primary-bg);
  color: var(--color-primary-fg);
  padding: 0 0 var(--space-2xl);
}

/* ---------- 面包屑 ---------- */
.page-products .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: var(--space-md) 0 var(--space-sm);
  font-family: var(--font-mono);
  font-size: var(--size-small);
  color: var(--color-neutral-gray);
  border-bottom: var(--border-thin);
}
.page-products .breadcrumb a {
  color: var(--color-neutral-gray);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.page-products .breadcrumb a:hover,
.page-products .breadcrumb a:focus-visible {
  color: var(--color-brand-accent);
}
.page-products .breadcrumb a[aria-current="page"] {
  color: var(--color-primary-fg);
  pointer-events: none;
}

/* ---------- 英雄区 ---------- */
.page-products .products-hero {
  padding: var(--space-xl) 0 var(--space-lg);
  border-bottom: var(--border-thin);
}
.page-products .products-hero__title {
  font-family: var(--font-heading);
  font-size: var(--size-h1);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin: 0 0 var(--space-sm);
  line-height: 1.1;
}
.page-products .products-hero__title-accent {
  color: var(--color-brand-accent);
  font-weight: 400;
  display: block;
  font-size: 0.55em;
  letter-spacing: 0.12em;
}
.page-products .products-hero__desc {
  font-family: var(--font-body);
  font-size: var(--size-body);
  color: var(--color-neutral-gray);
  max-width: 42em;
  margin: 0 0 var(--space-lg);
  line-height: 1.6;
}
.page-products .products-hero__fig {
  margin: 0;
  border: var(--border-thin);
  border-radius: 4px;
  overflow: hidden;
  box-shadow: var(--products-glow);
}
.page-products .products-hero__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 1200/600;
}

/* ---------- 技能树 ---------- */
.page-products .skills-tree {
  padding: var(--space-lg) 0 var(--space-xl);
  position: relative;
}
.page-products .skills-tree__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--products-node-gap);
  position: relative;
  z-index: 2;
}
.page-products .skills-tree__node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  padding: var(--space-md) var(--space-sm);
  background: var(--color-surface-dark);
  border: 1px solid var(--color-border-subtle);
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--transition-fast);
  outline-offset: 2px;
  position: relative;
}
.page-products .skills-tree__node:hover,
.page-products .skills-tree__node:focus-visible {
  border-color: var(--color-brand-accent);
  box-shadow: var(--products-glow);
  background: var(--color-surface-light);
}
.page-products .skills-tree__node[aria-expanded="true"] {
  border-color: var(--color-accent-secondary);
  box-shadow: 0 0 16px rgba(255,193,7,0.3);
  background: var(--color-surface-light);
}
.page-products .skills-tree__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: var(--color-brand-accent);
  color: var(--color-primary-fg);
  font-family: var(--font-mono);
  font-size: var(--size-small);
  font-weight: 700;
  border: 2px solid var(--color-accent-secondary);
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}
.page-products .skills-tree__node:hover .skills-tree__badge,
.page-products .skills-tree__node:focus-visible .skills-tree__badge {
  transform: scale(1.08);
}
.page-products .skills-tree__label {
  font-family: var(--font-heading);
  font-size: var(--size-body);
  font-weight: 600;
  text-align: center;
  line-height: 1.2;
  color: var(--color-primary-fg);
}
.page-products .skills-tree__hint {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-neutral-gray);
  text-align: center;
  display: block;
  line-height: 1.3;
}
.page-products .skills-tree__connector {
  display: none;
}

/* ---------- 技能面板 ---------- */
.page-products .skill-panels {
  padding: var(--space-lg) 0 var(--space-2xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}
.page-products .skill-panel {
  background: var(--color-surface-dark);
  border: var(--border-thin);
  border-radius: 6px;
  overflow: hidden;
  transition: box-shadow var(--transition-fast);
}
.page-products .skill-panel:hover {
  box-shadow: 0 2px 20px rgba(211,47,47,0.12);
}
.page-products .skill-panel__header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  background: var(--color-surface-light);
  border-bottom: 1px solid var(--color-border-subtle);
}
.page-products .skill-panel__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  background: var(--color-brand-accent);
  color: var(--color-primary-fg);
  font-family: var(--font-mono);
  font-size: var(--size-small);
  font-weight: 700;
  border: 1px solid var(--color-accent-secondary);
  flex-shrink: 0;
}
.page-products .skill-panel__title {
  font-family: var(--font-heading);
  font-size: var(--size-h3);
  font-weight: 600;
  margin: 0;
  line-height: 1.2;
  color: var(--color-primary-fg);
}
.page-products .skill-panel__body {
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}
.page-products .skill-panel__text {
  font-family: var(--font-body);
  font-size: var(--size-body);
  line-height: 1.7;
  color: var(--color-neutral-gray);
  margin: 0;
  max-width: 65ch;
}
.page-products .skill-panel__fig {
  margin: 0;
  border: var(--border-thin);
  border-radius: 4px;
  overflow: hidden;
  background: var(--color-surface-light);
}
.page-products .skill-panel__fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: attr(width) / attr(height);
}
.page-products .skill-panel__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}
.page-products .skill-panel .btn--outline {
  background: transparent;
  color: var(--color-brand-accent);
  border: 1px solid var(--color-brand-accent);
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-heading);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: var(--size-small);
  transition: all var(--transition-fast);
  text-decoration: none;
  border-radius: 3px;
  display: inline-block;
}
.page-products .skill-panel .btn--outline:hover,
.page-products .skill-panel .btn--outline:focus-visible {
  background: var(--color-brand-accent);
  color: var(--color-primary-fg);
  border-color: var(--color-accent-secondary);
  box-shadow: var(--products-glow);
}

/* ---------- 检索演示 ---------- */
.page-products .skill-panel__search-demo {
  background: var(--color-surface-light);
  border: var(--border-thin);
  border-radius: 4px;
  padding: var(--space-md);
  max-width: 32rem;
}
.page-products .skill-panel__search-input {
  display: block;
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-primary-bg);
  border: 1px solid var(--color-border-subtle);
  border-radius: 3px;
  color: var(--color-primary-fg);
  font-family: var(--font-body);
  font-size: var(--size-body);
  outline: none;
  transition: border-color var(--transition-fast);
}
.page-products .skill-panel__search-input::placeholder {
  color: var(--color-neutral-gray);
  opacity: 0.7;
}
.page-products .skill-panel__search-input:focus {
  border-color: var(--color-brand-accent);
  box-shadow: 0 0 0 1px var(--color-brand-accent);
}
.page-products .skill-panel__search-suggest {
  list-style: none;
  margin: var(--space-sm) 0 0;
  padding: 0;
  border: 1px solid var(--color-border-subtle);
  border-radius: 3px;
  overflow: hidden;
  background: var(--color-surface-dark);
}
.page-products .skill-panel__search-suggest li {
  padding: var(--space-xs) var(--space-md);
  font-family: var(--font-body);
  font-size: var(--size-small);
  color: var(--color-neutral-gray);
  border-bottom: 1px solid var(--color-border-subtle);
  cursor: default;
  transition: background var(--transition-fast);
}
.page-products .skill-panel__search-suggest li:last-child {
  border-bottom: none;
}
.page-products .skill-panel__search-suggest li:hover {
  background: var(--color-surface-light);
}
.page-products .skill-panel__search-suggest mark {
  background: transparent;
  color: var(--color-accent-secondary);
  font-weight: 600;
}

/* ---------- 通用辅助 ---------- */
.page-products .sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ===== 窄屏适配 (≤767px) ===== */
@media (max-width: 767px) {
  .page-products {
    padding-bottom: var(--space-xl);
  }
  .page-products .products-hero__title {
    font-size: var(--size-h2);
  }
  .page-products .products-hero__title-accent {
    font-size: 0.65em;
    display: inline;
  }
  .page-products .skills-tree__list {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }
  .page-products .skills-tree__node {
    padding: var(--space-sm) var(--space-xs);
  }
  .page-products .skills-tree__badge {
    width: 2rem;
    height: 2rem;
    font-size: 0.75rem;
  }
  .page-products .skills-tree__label {
    font-size: var(--size-small);
  }
  .page-products .skills-tree__hint {
    font-size: 0.65rem;
  }
  .page-products .skill-panel__header {
    padding: var(--space-sm) var(--space-md);
  }
  .page-products .skill-panel__title {
    font-size: var(--size-h4);
  }
  .page-products .skill-panel__body {
    padding: var(--space-md);
    gap: var(--space-md);
  }
  .page-products .skill-panel__fig img {
    aspect-ratio: 16/9;
  }
  .page-products .skill-panel__search-suggest li {
    font-size: 0.75rem;
    padding: var(--space-xs) var(--space-sm);
  }
}

/* ===== 桌面宽屏 (≥1024px) ===== */
@media (min-width: 1024px) {
  .page-products .skills-tree__list {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--products-node-gap);
    max-width: 72rem;
    margin: 0 auto;
  }
  .page-products .skills-tree__connector {
    display: block;
    position: absolute;
    top: 50%;
    left: 10%;
    width: 80%;
    height: 60px;
    transform: translateY(-50%);
    z-index: 1;
    pointer-events: none;
    opacity: 0.5;
  }
  .page-products .skill-panels {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
  }
  .page-products .skill-panel__body {
    flex-direction: row;
    flex-wrap: wrap;
  }
  .page-products .skill-panel__text {
    flex: 1 1 55%;
    min-width: 18rem;
  }
  .page-products .skill-panel__fig {
    flex: 1 1 38%;
    min-width: 14rem;
  }
  .page-products .skill-panel__actions {
    flex: 0 0 100%;
  }
  .page-products .skill-panel__search-demo {
    flex: 1 1 100%;
  }
}

/* ===== 超宽屏 (≥1440px) ===== */
@media (min-width: 1440px) {
  .page-products .skill-panels {
    grid-template-columns: repeat(2, 1fr);
    max-width: 72rem;
    margin: 0 auto;
  }
  .page-products .skills-tree__list {
    max-width: 76rem;
  }
}