/* ===== 页面专属：page-products ===== */
.page-products {
  --c-primary: #E63946;
  --c-secondary: #C0C0C0;
  --c-dark: #2B2D42;
  --c-accent: #39FF14;
  --c-light: #F8F9FA;
  --gradient-red: linear-gradient(135deg, #E63946, #FF6B6B);
  --gradient-silver: linear-gradient(135deg, #C0C0C0, #E0E0E0);
  --gradient-dark: linear-gradient(135deg, #2B2D42, #4A4E69);
  --font-head: 'Inter', -apple-system, sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'Consolas', monospace;
  --scale-h1: 2.5rem;
  --scale-h2: 2rem;
  --scale-h3: 1.5rem;
  --scale-body: 1rem;
  --scale-small: 0.875rem;
  --max-width: 1200px;
  --grid-gap: 1rem;
  --page-padding: 1.5rem;

  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--page-padding) 3rem;
  font-family: var(--font-body);
  color: var(--c-dark);
  background: var(--c-light);
  line-height: 1.6;
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--scale-small);
  padding: 1rem 0 0.5rem;
  color: var(--c-dark);
  opacity: 0.75;
  font-family: var(--font-mono);
}
.breadcrumb a {
  color: var(--c-primary);
  text-underline-offset: 2px;
  text-decoration: underline 1px dashed transparent;
  transition: text-decoration-color 0.2s;
}
.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  text-decoration-color: var(--c-primary);
}
.breadcrumb-sep {
  color: var(--c-secondary);
}
.breadcrumb-current {
  color: var(--c-dark);
  font-weight: 500;
}

/* ---------- 页面标题 ---------- */
.page-header {
  position: relative;
  margin: 2rem 0 2.5rem;
  padding-bottom: 1.2rem;
  border-bottom: 2px solid var(--c-secondary);
}
.page-header::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 80px;
  height: 2px;
  background: var(--gradient-red);
}
.page-title {
  font-family: var(--font-head);
  font-size: var(--scale-h1);
  font-weight: 800;
  margin: 0 0 0.5rem;
  color: var(--c-dark);
  letter-spacing: -0.02em;
  line-height: 1.15;
}
.page-subtitle {
  font-size: var(--scale-body);
  color: var(--c-dark);
  opacity: 0.7;
  margin: 0;
  max-width: 640px;
}

/* ---------- 区块标签 ---------- */
.section-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: var(--scale-small);
  color: var(--c-primary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.5rem;
}
.label-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  background: var(--gradient-red);
  color: #fff;
  font-weight: 700;
  font-size: 0.8rem;
  border-radius: 2px;
}
.label-text {
  font-weight: 600;
  color: var(--c-dark);
}

/* ---------- 通用区块标题 ---------- */
.section-heading {
  font-family: var(--font-head);
  font-size: var(--scale-h2);
  font-weight: 700;
  margin: 0 0 0.4rem;
  color: var(--c-dark);
  line-height: 1.2;
}
.section-desc {
  font-size: var(--scale-body);
  color: var(--c-dark);
  opacity: 0.7;
  margin: 0 0 1.5rem;
  max-width: 640px;
}

/* ===== 赛事入口 ===== */
.section-entry {
  margin: 3rem 0 4rem;
  padding: 2rem 0;
  border-top: 1px solid var(--c-secondary);
  border-bottom: 1px solid var(--c-secondary);
}
.entry-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-top: 1.5rem;
}

/* --- 单个卡片 --- */
.entry-card {
  background: #fff;
  border: 1px solid var(--c-secondary);
  border-radius: 4px;
  padding: 1.25rem;
  transition: transform 0.25s ease, box-shadow 0.3s ease;
  position: relative;
}
.entry-card:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow: 0 12px 28px rgba(43, 45, 66, 0.08);
}
.entry-card:focus-within {
  outline: 2px solid var(--c-accent);
  outline-offset: 2px;
}

.card-head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}
.card-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.2rem;
  height: 2.2rem;
  background: var(--gradient-dark);
  color: var(--c-accent);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  border-radius: 2px;
}
.card-title {
  font-family: var(--font-head);
  font-size: var(--scale-h3);
  font-weight: 700;
  margin: 0;
  color: var(--c-dark);
}

/* 版本选择器 */
.version-selector {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1rem;
  padding: 0.5rem 0.75rem;
  background: rgba(192, 192, 192, 0.12);
  border-left: 3px solid var(--c-primary);
  border-radius: 2px;
}
.vs-label {
  font-size: var(--scale-small);
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--c-dark);
  opacity: 0.8;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.vs-select {
  font-family: var(--font-body);
  font-size: var(--scale-small);
  padding: 0.3rem 0.6rem;
  border: 1px solid var(--c-secondary);
  border-radius: 2px;
  background: #fff;
  color: var(--c-dark);
  cursor: pointer;
  transition: border-color 0.2s;
}
.vs-select:hover,
.vs-select:focus-visible {
  border-color: var(--c-primary);
  outline: none;
  box-shadow: 0 0 0 2px rgba(230, 57, 70, 0.15);
}

/* 帧组 */
.frame-group {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
.frame-large {
  position: relative;
  border: 1px solid var(--c-secondary);
  border-radius: 3px;
  overflow: hidden;
  background: var(--c-dark);
}
.frame-img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 340px;
  object-fit: cover;
  object-position: center top;
}
.frame-badge {
  position: absolute;
  bottom: 0.4rem;
  left: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.2rem 0.6rem;
  background: rgba(43, 45, 66, 0.78);
  color: var(--c-light);
  border-radius: 2px;
  letter-spacing: 0.02em;
  line-height: 1.4;
}
.frame-badge.sm {
  background: rgba(230, 57, 70, 0.82);
  color: #fff;
}

.frame-small {
  position: relative;
  border: 1px dashed var(--c-secondary);
  border-radius: 3px;
  padding: 1rem;
  background: rgba(248, 249, 250, 0.7);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.frame-data {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.4rem 0.8rem;
}
.data-label {
  font-size: var(--scale-small);
  color: var(--c-dark);
  opacity: 0.7;
  font-weight: 500;
}
.data-value {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--c-primary);
  text-align: right;
}
.data-value.mono {
  font-family: var(--font-mono);
}

/* ===== 赛程线图与伤停 ===== */
.section-timeline {
  margin: 3rem 0 4rem;
  padding: 2rem 0;
  border-top: 1px solid var(--c-secondary);
}
.timeline-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-top: 1.5rem;
}
.timeline-block,
.injury-block {
  background: #fff;
  border: 1px solid var(--c-secondary);
  border-radius: 4px;
  padding: 1.5rem;
  position: relative;
}
.timeline-block {
  border-left: 4px solid var(--c-primary);
}
.injury-block {
  border-left: 4px solid var(--c-accent);
}
.img-wrap {
  margin: 1rem 0;
  border: 1px solid var(--c-secondary);
  border-radius: 3px;
  overflow: hidden;
  background: var(--c-dark);
}
.timeline-img,
.injury-img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 360px;
  object-fit: cover;
  object-position: center;
}
.timeline-features,
.injury-features {
  list-style: none;
  padding: 0;
  margin: 0.75rem 0 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.feature-marker {
  color: var(--c-primary);
  font-family: var(--font-mono);
  margin-right: 0.3rem;
}
.timeline-features li,
.injury-features li {
  font-size: var(--scale-body);
  color: var(--c-dark);
  line-height: 1.5;
}

/* ===== 适配清单 ===== */
.section-compatibility {
  margin: 3rem 0 2rem;
  padding: 2rem 0;
  border-top: 1px solid var(--c-secondary);
  border-bottom: 1px solid var(--c-secondary);
}
.compat-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 1.5rem;
}
.compat-card {
  background: #fff;
  border: 1px solid var(--c-secondary);
  border-radius: 4px;
  padding: 1.25rem;
  transition: transform 0.2s ease, box-shadow 0.25s ease;
}
.compat-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(43, 45, 66, 0.06);
}
.compat-icon-wrap {
  margin-bottom: 0.75rem;
  border: 1px solid var(--c-secondary);
  border-radius: 3px;
  overflow: hidden;
  background: var(--c-dark);
  max-width: 260px;
}
.compat-img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 160px;
  object-fit: cover;
  object-position: center;
}
.compat-device {
  font-family: var(--font-head);
  font-size: var(--scale-h3);
  font-weight: 700;
  margin: 0 0 0.5rem;
  color: var(--c-dark);
}
.compat-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.compat-list li {
  font-size: var(--scale-body);
  color: var(--c-dark);
  opacity: 0.8;
  padding-left: 1rem;
  position: relative;
}
.compat-list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--c-primary);
  font-family: var(--font-mono);
}
.compat-cta {
  margin-top: 2rem;
  padding: 1rem 1.25rem;
  background: rgba(192, 192, 192, 0.12);
  border-left: 3px solid var(--c-primary);
  border-radius: 2px;
  font-size: var(--scale-body);
  color: var(--c-dark);
}
.compat-cta a {
  color: var(--c-primary);
  font-weight: 600;
  text-underline-offset: 2px;
  text-decoration: underline 1px solid transparent;
  transition: text-decoration-color 0.2s;
}
.compat-cta a:hover,
.compat-cta a:focus-visible {
  text-decoration-color: var(--c-primary);
}

/* ===== 装饰区 ===== */
.section-decor {
  margin: 1rem 0 0;
  text-align: center;
  opacity: 0.35;
  pointer-events: none;
}
.decor-img {
  display: inline-block;
  width: 100%;
  max-width: 400px;
  height: auto;
  border-radius: 2px;
}

/* ===== 响应式：平板 600px+ ===== */
@media (min-width: 600px) {
  .page-products {
    --page-padding: 2rem;
  }
  .entry-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .frame-group {
    grid-template-columns: 3fr 1fr;
    align-items: start;
  }
  .frame-small {
    min-height: 200px;
  }
  .frame-data {
    grid-template-columns: 1fr;
    gap: 0.3rem;
  }
  .data-value {
    text-align: left;
  }
  .compat-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .timeline-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== 响应式：桌面 900px+ ===== */
@media (min-width: 900px) {
  .page-products {
    --page-padding: 2.5rem;
  }
  .entry-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
  .frame-group {
    grid-template-columns: 1fr;
  }
  .frame-data {
    grid-template-columns: 1fr 1fr;
  }
  .data-value {
    text-align: right;
  }
  .timeline-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
  .compat-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
  .page-title {
    font-size: 2.8rem;
  }
  .section-heading {
    font-size: var(--scale-h2);
  }
  .frame-img {
    max-height: 280px;
  }
  .compat-icon-wrap {
    max-width: 100%;
  }
}

/* ===== 响应式：大桌面 1200px+ ===== */
@media (min-width: 1200px) {
  .page-products {
    --page-padding: 3rem;
  }
  .frame-img {
    max-height: 320px;
  }
  .entry-grid {
    gap: 2rem;
  }
}

/* ===== 悬停与焦点增强 ===== */
.entry-card:hover .frame-img,
.timeline-block:hover .timeline-img,
.injury-block:hover .injury-img,
.compat-card:hover .compat-img {
  filter: brightness(1.05) contrast(1.02);
  transition: filter 0.3s ease;
}

/* ===== 选择器下拉版本切换视觉反馈（无JS，纯CSS模拟） ===== */
.entry-card:has(.vs-select option[value="old"]:checked) .frame-large {
  border-color: var(--c-secondary);
}
.entry-card:has(.vs-select option[value="old"]:checked) .frame-badge {
  background: rgba(192, 192, 192, 0.78);
  color: var(--c-dark);
}
.entry-card:has(.vs-select option[value="new"]:checked) .frame-large {
  border-color: var(--c-primary);
}
.entry-card:has(.vs-select option[value="new"]:checked) .frame-badge {
  background: rgba(230, 57, 70, 0.82);
  color: #fff;
}
.entry-card:has(.vs-select option[value="old"]:checked) .version-selector {
  border-left-color: var(--c-secondary);
}
.entry-card:has(.vs-select option[value="new"]:checked) .version-selector {
  border-left-color: var(--c-primary);
}

/* ===== 键盘焦点 ===== */
a:focus-visible,
select:focus-visible,
.entry-card:focus-within {
  outline: 2px solid var(--c-accent);
  outline-offset: 2px;
}