/* ========================================
   收纳家具 - 书签导航风格样式
   www.jiatinglian.cn
   ======================================== */

/* CSS 变量定义 */
:root {
  --accent-color: #ff5722;
  --accent-light: #ff8a65;
  --accent-dark: #e64a19;
  --bg-primary: #fafafa;
  --bg-secondary: #f5f5f5;
  --bg-card: #ffffff;
  --text-primary: #212121;
  --text-secondary: #757575;
  --text-muted: #9e9e9e;
  --border-color: #e0e0e0;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --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-primary);
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.2s ease;
}

ul, ol {
  list-style: none;
}

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

/* ========================================
   布局组件
   ======================================== */

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

.section {
  padding: 40px 0;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 24px;
  color: var(--text-primary);
}

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

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

.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(--accent-color);
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent-color), var(--accent-light));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.1rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
  padding: 8px 0;
  border-bottom: 2px solid transparent;
  transition: all 0.2s ease;
}

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

.search-box {
  position: relative;
}

.search-input {
  width: 240px;
  padding: 10px 16px 10px 40px;
  border: 1px solid var(--border-color);
  border-radius: 24px;
  font-size: 0.9rem;
  background: var(--bg-secondary);
  transition: all 0.2s ease;
}

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

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.9rem;
}

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

.hero {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, #fff3e0 100%);
  padding: 60px 0;
  text-align: center;
}

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

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

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 32px;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--accent-color);
  color: white;
  border-radius: 28px;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(255, 87, 34, 0.3);
}

.hero-cta:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 87, 34, 0.4);
}

/* ========================================
   分类集合 Collections
   ======================================== */

.collections {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 40px;
}

.collection-item {
  padding: 16px 28px;
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  font-weight: 600;
  color: var(--text-secondary);
  transition: all 0.2s ease;
  cursor: pointer;
}

.collection-item:hover,
.collection-item.active {
  border-color: var(--accent-color);
  color: var(--accent-color);
  box-shadow: var(--shadow-md);
}

/* ========================================
   书签卡片 Bookmark Card
   ======================================== */

.bookmark-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.bookmark-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: all 0.3s ease;
  cursor: pointer;
}

.bookmark-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-light);
}

.bookmark-header {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 14px;
}

.bookmark-favicon {
  width: 44px;
  height: 44px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.bookmark-info {
  flex: 1;
  min-width: 0;
}

.bookmark-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.bookmark-url {
  font-size: 0.85rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.bookmark-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

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

.bookmark-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tag {
  padding: 4px 10px;
  background: #fff3e0;
  color: var(--accent-color);
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 500;
}

.bookmark-time {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ========================================
   面包屑 Breadcrumb
   ======================================== */

.breadcrumb {
  padding: 16px 0;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
}

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

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

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

.breadcrumb-separator {
  color: var(--text-muted);
}

/* ========================================
   筛选 Filter
   ======================================== */

.filter-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.filter-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.filter-options {
  display: flex;
  gap: 8px;
}

.filter-btn {
  padding: 8px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--accent-color);
  border-color: var(--accent-color);
  color: white;
}

/* ========================================
   标签云 Tag Cloud
   ======================================== */

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-cloud .tag {
  padding: 6px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  transition: all 0.2s ease;
}

.tag-cloud .tag:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
  background: #fff3e0;
}

.tag-count {
  margin-left: 4px;
  color: var(--text-muted);
}

/* ========================================
   文章详情页
   ======================================== */

.article-header {
  text-align: center;
  padding: 40px 0;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 40px;
}

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

.article-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  flex-wrap: wrap;
}

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

.article-content {
  max-width: 800px;
  margin: 0 auto;
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-primary);
}

.article-content h2 {
  font-size: 1.5rem;
  margin: 40px 0 20px;
  color: var(--text-primary);
}

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

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

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

.article-content ul {
  list-style: disc;
}

.article-content ol {
  list-style: decimal;
}

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

/* ========================================
   详情卡片
   ======================================== */

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

.detail-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.detail-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--accent-color), var(--accent-light));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.8rem;
}

.detail-info h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.detail-info .meta {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.detail-actions {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
}

.btn {
  padding: 10px 24px;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
}

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

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

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

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

.detail-section {
  margin-bottom: 24px;
}

.detail-section h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.detail-section p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.detail-list {
  display: grid;
  gap: 10px;
}

.detail-list-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.detail-list-item::before {
  content: "•";
  color: var(--accent-color);
  font-weight: bold;
}

/* ========================================
   推荐文章区域
   ======================================== */

.rec-section {
  background: var(--bg-secondary);
  padding: 40px 0;
  margin-top: 40px;
}

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

.rec-column h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
  padding-bottom: 10px;
  border-bottom: 2px solid var(--accent-color);
  display: inline-block;
}

.rec-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.rec-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.rec-item::before {
  content: "›";
  color: var(--accent-color);
  font-weight: bold;
  font-size: 1.1rem;
}

.rec-item:hover {
  color: var(--accent-color);
}

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

.footer {
  background: var(--text-primary);
  color: #b0b0b0;
  padding: 48px 0 24px;
  margin-top: 60px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand .logo {
  color: white;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: #9e9e9e;
}

.footer-column h4 {
  color: white;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link {
  font-size: 0.9rem;
  color: #9e9e9e;
  transition: color 0.2s ease;
}

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

.footer-bottom {
  border-top: 1px solid #424242;
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-copyright {
  font-size: 0.85rem;
  color: #757575;
}

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

.footer-nav a {
  font-size: 0.85rem;
  color: #757575;
}

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

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

.error-page {
  min-height: calc(100vh - var(--header-height) - 300px);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 20px;
}

.error-content {
  max-width: 500px;
}

.error-code {
  font-size: 8rem;
  font-weight: 700;
  color: var(--accent-color);
  line-height: 1;
  margin-bottom: 16px;
  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;
}

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

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

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@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;
    gap: 20px;
  }

  .search-box {
    order: 2;
  }

  .search-input {
    width: 180px;
  }

  .search-input:focus {
    width: 200px;
  }

  .hero {
    padding: 40px 0;
  }

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

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

  .bookmark-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .bookmark-card {
    padding: 16px;
  }

  .collections {
    gap: 12px;
  }

  .collection-item {
    padding: 12px 20px;
    font-size: 0.9rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

  .filter-bar {
    flex-direction: column;
    align-items: flex-start;
  }

  .detail-card {
    padding: 24px;
  }

  .detail-header {
    flex-direction: column;
    text-align: center;
  }

  .detail-actions {
    justify-content: center;
  }

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

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

@media (max-width: 480px) {
  .bookmark-grid {
    grid-template-columns: 1fr;
  }

  .nav {
    gap: 16px;
  }

  .nav-link {
    font-size: 0.85rem;
  }

  .section {
    padding: 24px 0;
  }

  .section-title {
    font-size: 1.25rem;
  }
}