/* ========================================
   机械表 - 维基风格样式表
   www.shishangbiao.cn
   ======================================== */

/* CSS 变量定义 */
:root {
  --accent-color: #7c6a46;
  --accent-light: #9a8660;
  --accent-dark: #5c4f35;
  --bg-primary: #ffffff;
  --bg-secondary: #f8f6f3;
  --bg-tertiary: #f0ece5;
  --text-primary: #2d2d2d;
  --text-secondary: #5a5a5a;
  --text-muted: #888888;
  --border-color: #e0dcd5;
  --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;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  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);
}

ul {
  list-style: none;
}

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

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

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-color);
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo::before {
  content: "◈";
  font-size: 1.8rem;
}

.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);
}

.header-search {
  position: relative;
}

.header-search input {
  width: 240px;
  padding: 8px 16px 8px 36px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-secondary);
  font-size: 0.9rem;
  transition: all 0.2s;
}

.header-search input:focus {
  outline: none;
  border-color: var(--accent-color);
  width: 280px;
}

.header-search::before {
  content: "🔍";
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.9rem;
  opacity: 0.5;
}

/* ========================================
   面包屑 Breadcrumb
   ======================================== */
.breadcrumb {
  background-color: var(--bg-tertiary);
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color);
}

.breadcrumb-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  font-size: 0.85rem;
  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);
}

/* ========================================
   主体容器
   ======================================== */
.main-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 32px 20px;
}

/* ========================================
   Hero 区域
   ======================================== */
.hero {
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-tertiary) 100%);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  margin-bottom: 40px;
  border: 1px solid var(--border-color);
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.hero-title span {
  color: var(--accent-color);
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-search {
  max-width: 560px;
  margin: 0 auto;
  position: relative;
}

.hero-search input {
  width: 100%;
  padding: 16px 24px;
  padding-right: 120px;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 1rem;
  background-color: var(--bg-primary);
  transition: border-color 0.2s;
}

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

.hero-search button {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  padding: 10px 24px;
  background-color: var(--accent-color);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s;
}

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

/* ========================================
   区块标题
   ======================================== */
.section-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--accent-color);
  display: inline-block;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.view-all {
  font-size: 0.9rem;
  color: var(--accent-color);
}

/* ========================================
   卡片网格
   ======================================== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
  margin-bottom: 48px;
}

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

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

.card-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.card-title a {
  color: inherit;
}

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

.card-summary {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.card-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  gap: 16px;
}

/* ========================================
   分类标签
   ======================================== */
.category-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 48px;
}

.category-tag {
  padding: 12px 24px;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.2s;
}

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

/* ========================================
   列表样式
   ======================================== */
.list-section {
  background-color: var(--bg-primary);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--border-color);
  margin-bottom: 48px;
}

.list-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--border-color);
}

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

.list-item-title {
  font-weight: 600;
  margin-bottom: 6px;
}

.list-item-title a {
  color: var(--text-primary);
}

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

.list-item-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ========================================
   三栏布局
   ======================================== */
.three-column {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.column-box {
  background-color: var(--bg-primary);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--border-color);
}

.column-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.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);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.column-list .count {
  font-size: 0.8rem;
  color: var(--text-muted);
  background-color: var(--bg-secondary);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

/* ========================================
   文章页布局
   ======================================== */
.article-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 32px;
}

.sidebar {
  position: sticky;
  top: calc(var(--header-height) + 32px);
  height: fit-content;
}

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

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

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

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

.toc-list a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  display: block;
}

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

/* ========================================
   文章内容
   ======================================== */
.article-content {
  background-color: var(--bg-primary);
  border-radius: var(--radius-md);
  padding: 40px;
  border: 1px solid var(--border-color);
}

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

.article-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.3;
}

.article-meta {
  display: flex;
  gap: 24px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.article-body {
  font-size: 1.05rem;
  line-height: 1.8;
  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);
}

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

.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;
}

/* 信息框 */
.info-box {
  background-color: var(--bg-secondary);
  border-left: 4px solid var(--accent-color);
  padding: 20px 24px;
  margin: 24px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

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

.info-box table {
  width: 100%;
  font-size: 0.95rem;
}

.info-box td {
  padding: 8px 0;
  border-bottom: 1px solid var(--border-color);
}

.info-box td:first-child {
  color: var(--text-muted);
  width: 120px;
}

.info-box tr:last-child td {
  border-bottom: none;
}

/* ========================================
   分类页头部
   ======================================== */
.category-header {
  background-color: var(--bg-primary);
  border-radius: var(--radius-md);
  padding: 32px;
  border: 1px solid var(--border-color);
  margin-bottom: 32px;
}

.category-title {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.category-desc {
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.category-stats {
  display: flex;
  gap: 24px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ========================================
   子分类
   ======================================== */
.subcategory-section {
  margin-bottom: 32px;
}

.subcategory-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.subcategory-item {
  padding: 8px 16px;
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.subcategory-item:hover {
  background-color: var(--accent-color);
  color: white;
}

/* ========================================
   404 页面
   ======================================== */
.error-page {
  text-align: center;
  padding: 80px 40px;
  background-color: var(--bg-primary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.error-code {
  font-size: 6rem;
  font-weight: 700;
  color: var(--accent-color);
  line-height: 1;
  margin-bottom: 16px;
}

.error-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.error-desc {
  color: var(--text-secondary);
  margin-bottom: 32px;
}

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

.btn {
  padding: 12px 32px;
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: all 0.2s;
  display: inline-block;
}

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

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

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

.btn-secondary:hover {
  background-color: var(--border-color);
}

/* ========================================
   页脚
   ======================================== */
.footer {
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  padding: 40px 0;
  margin-top: 60px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  text-align: center;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin-bottom: 20px;
}

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

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

.footer-copyright {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1024px) {
  .article-layout {
    grid-template-columns: 1fr;
  }

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

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

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

  .header-inner {
    padding: 0 16px;
  }

  .nav {
    display: none;
  }

  .header-search input {
    width: 160px;
  }

  .hero {
    padding: 40px 24px;
  }

  .hero-title {
    font-size: 1.8rem;
  }

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

  .hero-search button {
    position: static;
    transform: none;
    width: 100%;
    margin-top: 12px;
  }

  .hero-search input {
    padding-right: 24px;
  }

  .main-container {
    padding: 24px 16px;
  }

  .card-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .article-content {
    padding: 24px;
  }

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

  .error-code {
    font-size: 4rem;
  }

  .footer-links {
    flex-wrap: wrap;
    gap: 16px;
  }
}

@media (max-width: 480px) {
  .category-stats {
    flex-direction: column;
    gap: 8px;
  }

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

  .error-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }
}