/* 数字插图 - 产品规格风格样式表 */
/* 主色调: #607d8b (蓝灰色) */

:root {
  --accent-color: #607d8b;
  --accent-dark: #455a64;
  --accent-light: #90a4ae;
  --bg-primary: #ffffff;
  --bg-secondary: #f5f7f8;
  --bg-card: #ffffff;
  --text-primary: #263238;
  --text-secondary: #546e7a;
  --text-muted: #78909c;
  --border-color: #eceff1;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --max-width: 1200px;
  --header-height: 64px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-secondary);
}

a {
  color: var(--accent-color);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--accent-dark);
}

/* Header */
.header {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--accent-color);
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo::before {
  content: "◆";
  color: var(--accent-color);
}

.nav {
  display: flex;
  gap: 32px;
}

.nav a {
  color: var(--text-secondary);
  font-weight: 500;
  padding: 8px 0;
  border-bottom: 2px solid transparent;
}

.nav a:hover,
.nav a.active {
  color: var(--accent-color);
  border-bottom-color: var(--accent-color);
}

.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 8px 16px;
  width: 240px;
}

.search-box input {
  border: none;
  background: none;
  outline: none;
  width: 100%;
  font-size: 14px;
  color: var(--text-primary);
}

.search-box input::placeholder {
  color: var(--text-muted);
}

/* Main Container */
.main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-dark) 100%);
  border-radius: var(--radius-lg);
  padding: 48px;
  color: white;
  margin-bottom: 32px;
  text-align: center;
}

.hero h1 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 12px;
}

.hero p {
  font-size: 16px;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto;
}

/* Section Title */
.section-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-title::before {
  content: "";
  width: 4px;
  height: 20px;
  background: var(--accent-color);
  border-radius: 2px;
}

/* Card Grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: box-shadow 0.2s, transform 0.2s;
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-image {
  width: 100%;
  height: 160px;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 48px;
}

.card-body {
  padding: 16px;
}

.card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.card-meta {
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  gap: 16px;
}

.card-desc {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 8px;
  line-height: 1.5;
}

.card-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Category Grid */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.category-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  padding: 24px;
  text-align: center;
  transition: all 0.2s;
}

.category-card:hover {
  border-color: var(--accent-color);
  background: var(--bg-secondary);
}

.category-icon {
  font-size: 32px;
  margin-bottom: 12px;
}

.category-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}

.category-count {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Spec Table */
.spec-table {
  width: 100%;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  overflow: hidden;
  margin-bottom: 32px;
}

.spec-table-header {
  background: var(--bg-secondary);
  padding: 16px 20px;
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-color);
}

.spec-table-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  border-bottom: 1px solid var(--border-color);
}

.spec-table-row:last-child {
  border-bottom: none;
}

.spec-table-label {
  padding: 14px 20px;
  background: var(--bg-secondary);
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 13px;
}

.spec-table-value {
  padding: 14px 20px;
  color: var(--text-primary);
}

/* Spec Group */
.spec-group {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  margin-bottom: 20px;
  overflow: hidden;
}

.spec-group-title {
  background: var(--accent-color);
  color: white;
  padding: 12px 20px;
  font-weight: 600;
  font-size: 14px;
}

.spec-group-content {
  padding: 16px 20px;
}

.spec-group-content ul {
  list-style: none;
}

.spec-group-content li {
  padding: 8px 0;
  border-bottom: 1px dashed var(--border-color);
  display: flex;
  justify-content: space-between;
}

.spec-group-content li:last-child {
  border-bottom: none;
}

.spec-item-label {
  color: var(--text-secondary);
  font-size: 13px;
}

.spec-item-value {
  color: var(--text-primary);
  font-weight: 500;
}

/* Breadcrumb */
.breadcrumb {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 12px 20px;
  margin-bottom: 24px;
  font-size: 13px;
  color: var(--text-muted);
}

.breadcrumb a {
  color: var(--text-secondary);
}

.breadcrumb a:hover {
  color: var(--accent-color);
}

.breadcrumb span {
  margin: 0 8px;
  color: var(--text-muted);
}

/* Article Content */
.article-header {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  padding: 32px;
  margin-bottom: 24px;
  text-align: center;
}

.article-image {
  width: 100%;
  max-width: 600px;
  height: 300px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  margin: 0 auto 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 64px;
}

.article-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.article-meta {
  color: var(--text-muted);
  font-size: 14px;
}

.article-content {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  padding: 32px;
  margin-bottom: 24px;
}

.article-content h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 24px 0 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border-color);
}

.article-content h2:first-child {
  margin-top: 0;
}

.article-content p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.article-content ul {
  margin-left: 20px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.article-content li {
  margin-bottom: 8px;
}

/* Button */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
}

.btn-primary {
  background: var(--accent-color);
  color: white;
}

.btn-primary:hover {
  background: var(--accent-dark);
  color: white;
}

.btn-outline {
  background: transparent;
  color: var(--accent-color);
  border: 1px solid var(--accent-color);
}

.btn-outline:hover {
  background: var(--accent-color);
  color: white;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 13px;
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin: 32px 0;
}

.pagination a,
.pagination span {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 12px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
}

.pagination a:hover {
  background: var(--accent-color);
  color: white;
  border-color: var(--accent-color);
}

.pagination .current {
  background: var(--accent-color);
  color: white;
  border-color: var(--accent-color);
}

/* Sidebar Lists */
.sidebar-section {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  padding: 20px;
  margin-bottom: 20px;
}

.sidebar-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-list {
  list-style: none;
}

.sidebar-list li {
  padding: 10px 0;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-list li:last-child {
  border-bottom: none;
}

.sidebar-list a {
  color: var(--text-secondary);
  font-size: 13px;
  display: flex;
  justify-content: space-between;
}

.sidebar-list a:hover {
  color: var(--accent-color);
}

.sidebar-list .count {
  color: var(--text-muted);
  font-size: 12px;
}

/* Three Column Layout */
.three-col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}

/* Two Column Layout */
.two-col {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 24px;
}

/* 404 Page */
.error-page {
  text-align: center;
  padding: 80px 24px;
}

.error-code {
  font-size: 120px;
  font-weight: 700;
  color: var(--accent-light);
  line-height: 1;
  margin-bottom: 16px;
}

.error-title {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.error-desc {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* Footer */
.footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  padding: 40px 24px 24px;
  margin-top: 48px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin-bottom: 32px;
}

.footer-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 13px;
}

.footer-links a:hover {
  color: var(--accent-color);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
}

/* Tag */
.tag {
  display: inline-block;
  padding: 4px 10px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--text-secondary);
  margin-right: 8px;
}

.tag-primary {
  background: var(--accent-color);
  color: white;
}

/* Responsive */
@media (max-width: 1024px) {
  .three-col {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .header-inner {
    padding: 0 16px;
  }

  .nav {
    display: none;
  }

  .search-box {
    width: 160px;
  }

  .main {
    padding: 16px;
  }

  .hero {
    padding: 32px 24px;
  }

  .hero h1 {
    font-size: 24px;
  }

  .card-grid,
  .category-grid {
    grid-template-columns: 1fr;
  }

  .three-col {
    grid-template-columns: 1fr;
  }

  .two-col {
    grid-template-columns: 1fr;
  }

  .spec-table-row {
    grid-template-columns: 120px 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .article-header,
  .article-content {
    padding: 20px;
  }
}

/* Print Styles */
@media print {
  .header,
  .footer,
  .sidebar-section,
  .pagination {
    display: none;
  }

  .main {
    max-width: 100%;
  }

  .card,
  .spec-group,
  .article-content {
    break-inside: avoid;
  }
}