/* ========================================
   游戏机改装 - 维基知识库风格样式
   www.dingzhigaizhuang.cn
   ======================================== */

/* CSS 变量 */
:root {
  --accent-color: #7c6a46;
  --accent-light: #9a8660;
  --accent-dark: #5c4f35;
  --bg-primary: #f8f6f1;
  --bg-secondary: #fff;
  --bg-card: #faf9f6;
  --text-primary: #2d2a26;
  --text-secondary: #5a5752;
  --text-muted: #8a8680;
  --border-color: #e5e2dc;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --max-width: 1200px;
  --header-height: 60px;
}

/* 重置样式 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--bg-primary);
}

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

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

img {
  max-width: 100%;
  height: auto;
}

ul, ol {
  list-style: none;
}

/* ========================================
   布局容器
   ======================================== */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ========================================
   页头 Header
   ======================================== */

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--accent-color);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  color: var(--text-secondary);
  font-size: 0.9375rem;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent-color);
  background: var(--bg-primary);
}

.search-box {
  position: relative;
  width: 240px;
}

.search-box input {
  width: 100%;
  padding: 8px 36px 8px 14px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  background: var(--bg-primary);
  transition: border-color 0.2s;
}

.search-box input:focus {
  outline: none;
  border-color: var(--accent-color);
}

.search-box button {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
}

/* ========================================
   面包屑导航
   ======================================== */

.breadcrumb {
  padding: 16px 0;
  font-size: 0.875rem;
  color: var(--text-muted);
}

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

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

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

/* ========================================
   Hero 区域
   ======================================== */

.hero {
  background: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-dark) 100%);
  color: #fff;
  padding: 60px 0;
  text-align: center;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.hero-desc {
  font-size: 1.125rem;
  opacity: 0.9;
  margin-bottom: 32px;
}

.hero-search {
  max-width: 600px;
  margin: 0 auto;
  position: relative;
}

.hero-search input {
  width: 100%;
  padding: 16px 60px 16px 24px;
  border: none;
  border-radius: var(--radius-lg);
  font-size: 1rem;
  box-shadow: var(--shadow-md);
}

.hero-search input:focus {
  outline: 2px solid var(--accent-light);
}

.hero-search button {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--accent-color);
  color: #fff;
  border: none;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 0.9375rem;
  transition: background 0.2s;
}

.hero-search button:hover {
  background: var(--accent-dark);
}

/* ========================================
   区块标题
   ======================================== */

.section {
  padding: 48px 0;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-title::before {
  content: "";
  width: 4px;
  height: 24px;
  background: var(--accent-color);
  border-radius: 2px;
}

/* ========================================
   卡片组件
   ======================================== */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

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

.card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--accent-light);
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.card-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-meta {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
  font-size: 0.8125rem;
  color: var(--text-muted);
  display: flex;
  gap: 16px;
}

/* ========================================
   分类标签
   ======================================== */

.category-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.category-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.9375rem;
  font-weight: 500;
  transition: all 0.2s;
}

.category-tag:hover {
  background: var(--accent-color);
  color: #fff;
  border-color: var(--accent-color);
}

.category-tag .count {
  background: var(--bg-primary);
  color: var(--text-muted);
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
}

.category-tag:hover .count {
  background: rgba(255,255,255,0.2);
  color: #fff;
}

/* ========================================
   列表组件
   ======================================== */

.list-group {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.list-item {
  display: flex;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  transition: background 0.2s;
}

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

.list-item:hover {
  background: var(--bg-card);
}

.list-item-icon {
  width: 40px;
  height: 40px;
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 16px;
  color: var(--accent-color);
  font-size: 1.125rem;
  flex-shrink: 0;
}

.list-item-content {
  flex: 1;
  min-width: 0;
}

.list-item-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.list-item-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.list-item-meta {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-left: 16px;
  flex-shrink: 0;
}

/* ========================================
   三栏布局
   ======================================== */

.three-column {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.column-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
}

.column-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--accent-color);
  color: var(--text-primary);
}

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

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

.column-list a {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

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

/* ========================================
   文章页面布局
   ======================================== */

.article-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 32px;
  padding: 24px 0 48px;
}

.sidebar {
  position: sticky;
  top: 80px;
  height: fit-content;
}

.sidebar-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 20px;
}

.sidebar-title {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.toc-list li {
  padding: 8px 0;
  border-bottom: 1px solid var(--border-color);
}

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

.toc-list a {
  color: var(--text-secondary);
  font-size: 0.875rem;
  display: block;
}

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

.toc-list .h2 {
  padding-left: 0;
}

.toc-list .h3 {
  padding-left: 16px;
  font-size: 0.8125rem;
}

.main-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 40px;
}

.article-header {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.article-title {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.article-meta {
  display: flex;
  gap: 20px;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.article-meta span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-body {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--text-primary);
}

.article-body h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 40px 0 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 32px 0 16px;
  color: var(--text-primary);
}

.article-body p {
  margin-bottom: 20px;
}

.article-body ul,
.article-body ol {
  margin-bottom: 20px;
  padding-left: 24px;
}

.article-body ul li {
  list-style: disc;
  margin-bottom: 8px;
}

.article-body ol li {
  list-style: decimal;
  margin-bottom: 8px;
}

.article-body img {
  border-radius: var(--radius-md);
  margin: 24px 0;
  box-shadow: var(--shadow-sm);
}

.article-body code {
  background: var(--bg-primary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-family: "SF Mono", Monaco, monospace;
  font-size: 0.875rem;
  color: var(--accent-dark);
}

.article-body pre {
  background: var(--bg-primary);
  padding: 16px;
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-bottom: 20px;
}

.article-body pre code {
  background: none;
  padding: 0;
}

/* 信息框 */
.info-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  margin: 24px 0;
}

.info-box-title {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--accent-color);
}

.info-box-list {
  font-size: 0.9375rem;
}

.info-box-list li {
  padding: 6px 0;
  display: flex;
  gap: 12px;
}

.info-box-list .label {
  color: var(--text-muted);
  min-width: 80px;
}

.info-box-list .value {
  color: var(--text-primary);
  font-weight: 500;
}

/* ========================================
   分类页面头部
   ======================================== */

.category-header {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px;
  margin-bottom: 32px;
  text-align: center;
}

.category-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.category-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.category-stats {
  display: inline-flex;
  gap: 24px;
  padding: 12px 24px;
  background: var(--bg-primary);
  border-radius: var(--radius-md);
}

.category-stats span {
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

.category-stats strong {
  color: var(--accent-color);
  margin-right: 4px;
}

/* ========================================
   404 页面
   ======================================== */

.error-page {
  min-height: calc(100vh - var(--header-height) - 200px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 20px;
}

.error-code {
  font-size: 8rem;
  font-weight: 700;
  color: var(--accent-color);
  line-height: 1;
  margin-bottom: 20px;
  opacity: 0.8;
}

.error-title {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.error-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 400px;
}

.error-actions {
  display: flex;
  gap: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  font-weight: 500;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}

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

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

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-primary);
  border-color: var(--accent-light);
}

/* ========================================
   页脚
   ======================================== */

.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 40px 0;
  margin-top: 48px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-info {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

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

/* ========================================
   响应式设计
   ======================================== */

@media (max-width: 1024px) {
  .three-column {
    grid-template-columns: 1fr;
  }

  .article-layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    order: 2;
  }

  .main-content {
    order: 1;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 56px;
  }

  .header-inner {
    flex-wrap: wrap;
    height: auto;
    padding: 12px 0;
    gap: 12px;
  }

  .nav {
    order: 3;
    width: 100%;
    justify-content: center;
    padding-top: 8px;
    border-top: 1px solid var(--border-color);
  }

  .search-box {
    width: 100%;
    max-width: 200px;
  }

  .hero {
    padding: 40px 0;
  }

  .hero-title {
    font-size: 1.75rem;
  }

  .hero-desc {
    font-size: 1rem;
  }

  .section {
    padding: 32px 0;
  }

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

  .main-content {
    padding: 24px;
  }

  .article-title {
    font-size: 1.5rem;
  }

  .article-meta {
    flex-wrap: wrap;
    gap: 12px;
  }

  .error-code {
    font-size: 5rem;
  }

  .footer-inner {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }

  .error-actions {
    flex-direction: column;
    width: 100%;
    max-width: 280px;
  }

  .btn {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .category-tag {
    padding: 10px 16px;
    font-size: 0.875rem;
  }

  .list-item {
    flex-wrap: wrap;
  }

  .list-item-meta {
    width: 100%;
    margin-left: 56px;
    margin-top: 8px;
  }

  .category-header {
    padding: 24px 20px;
  }

  .category-title {
    font-size: 1.5rem;
  }

  .category-stats {
    flex-direction: column;
    gap: 8px;
  }
}

/* ========================================
   辅助类
   ======================================== */

.text-center {
  text-align: center;
}

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }