/* ============================================
   古董珠宝 - 古董珠宝鉴定与收藏投资
   www.fugushoushi.cn
   ============================================ */

/* CSS Variables */
:root {
  --primary-color: #8b6914;
  --accent-color: #d4af37;
  --bg-color: #faf8f5;
  --card-bg: #ffffff;
  --text-primary: #2c2416;
  --text-secondary: #6b5d4d;
  --border-color: #e8e0d5;
  --shadow: 0 2px 8px rgba(44, 36, 22, 0.08);
  --shadow-hover: 0 4px 16px rgba(44, 36, 22, 0.12);
  --radius: 8px;
  --radius-lg: 12px;
  --max-width: 1200px;
  --header-height: 64px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-color);
}

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

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

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

ul, ol {
  list-style: none;
}

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

/* ============================================
   Header
   ============================================ */
.header {
  background: var(--card-bg);
  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: 20px;
  font-weight: 700;
  color: var(--primary-color);
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
}

.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(--primary-color);
  border-bottom-color: var(--accent-color);
}

.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 8px 16px;
  width: 240px;
}

.search-box input {
  border: none;
  background: none;
  outline: none;
  flex: 1;
  font-size: 14px;
  color: var(--text-primary);
}

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

.search-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: 0.3s;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  background: linear-gradient(135deg, #2c2416 0%, #4a3f2e 100%);
  color: #fff;
  padding: 80px 0;
  text-align: center;
}

.hero-title {
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: 2px;
}

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

.hero-desc {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.8);
  max-width: 600px;
  margin: 0 auto 40px;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 60px;
  margin-top: 48px;
}

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

.stat-num {
  font-size: 36px;
  font-weight: 700;
  color: var(--accent-color);
}

.stat-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 4px;
}

/* ============================================
   Section
   ============================================ */
.section {
  padding: 60px 0;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}

.section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 12px;
}

.section-title::before {
  content: '';
  width: 4px;
  height: 24px;
  background: linear-gradient(180deg, var(--accent-color), var(--primary-color));
  border-radius: 2px;
}

.view-more {
  font-size: 14px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 4px;
}

.view-more:hover {
  color: var(--primary-color);
}

/* ============================================
   Category Cards
   ============================================ */
.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 48px;
}

.category-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: all 0.3s;
  border: 1px solid var(--border-color);
}

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

.category-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 24px;
}

.category-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.category-count {
  font-size: 14px;
  color: var(--text-secondary);
}

/* ============================================
   Article Cards
   ============================================ */
.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all 0.3s;
  border: 1px solid var(--border-color);
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.article-image {
  width: 100%;
  height: 180px;
  object-fit: cover;
  background: linear-gradient(135deg, #e8e0d5, #d4c8b8);
}

.article-content {
  padding: 20px;
}

.article-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--primary-color);
  background: rgba(139, 105, 20, 0.1);
  padding: 4px 10px;
  border-radius: 12px;
  margin-bottom: 12px;
}

.article-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.5;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--text-secondary);
}

.article-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ============================================
   Article List
   ============================================ */
.article-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.article-list-item {
  display: flex;
  gap: 20px;
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-color);
  transition: all 0.3s;
}

.article-list-item:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--accent-color);
}

.article-list-image {
  width: 160px;
  height: 120px;
  object-fit: cover;
  border-radius: var(--radius);
  background: linear-gradient(135deg, #e8e0d5, #d4c8b8);
  flex-shrink: 0;
}

.article-list-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.article-list-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

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

/* ============================================
   Breadcrumb
   ============================================ */
.breadcrumb {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 0;
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
}

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

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

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

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

/* ============================================
   Page Header
   ============================================ */
.page-header {
  background: linear-gradient(135deg, #2c2416 0%, #4a3f2e 100%);
  color: #fff;
  padding: 48px 0;
  text-align: center;
}

.page-title {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 8px;
}

.page-desc {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.8);
}

/* ============================================
   Filter
   ============================================ */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  padding: 16px 20px;
  background: var(--card-bg);
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
}

.filter-label {
  font-size: 14px;
  color: var(--text-secondary);
}

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

.filter-btn {
  padding: 6px 16px;
  font-size: 14px;
  border: 1px solid var(--border-color);
  background: var(--card-bg);
  border-radius: 16px;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.2s;
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--primary-color);
  color: #fff;
  border-color: var(--primary-color);
}

/* ============================================
   Tags
   ============================================ */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 14px;
  font-size: 13px;
  color: var(--text-secondary);
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  transition: all 0.2s;
}

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

.tag-count {
  font-size: 12px;
  opacity: 0.7;
}

/* ============================================
   Article Content
   ============================================ */
.article-container {
  max-width: 800px;
  margin: 0 auto;
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow);
}

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

.article-main-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.4;
  margin-bottom: 16px;
}

.article-info {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 14px;
  color: var(--text-secondary);
}

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

.article-body {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-primary);
}

.article-body h2 {
  font-size: 22px;
  font-weight: 600;
  margin: 32px 0 16px;
  color: var(--text-primary);
}

.article-body h3 {
  font-size: 18px;
  font-weight: 600;
  margin: 24px 0 12px;
  color: var(--text-primary);
}

.article-body p {
  margin-bottom: 16px;
}

.article-body ul,
.article-body ol {
  margin-bottom: 16px;
  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);
  margin: 24px 0;
}

/* ============================================
   Sidebar
   ============================================ */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-block {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-color);
}

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

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

.sidebar-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px;
  border-radius: var(--radius);
  transition: background 0.2s;
}

.sidebar-item:hover {
  background: var(--bg-color);
}

.sidebar-item-num {
  width: 24px;
  height: 24px;
  background: var(--primary-color);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  flex-shrink: 0;
}

.sidebar-item-num.top {
  background: var(--accent-color);
}

.sidebar-item-title {
  font-size: 14px;
  color: var(--text-primary);
  line-height: 1.5;
  flex: 1;
}

.sidebar-item-meta {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ============================================
   404 Page
   ============================================ */
.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: 120px;
  font-weight: 700;
  color: var(--accent-color);
  line-height: 1;
  margin-bottom: 16px;
}

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

.error-desc {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 500;
  border-radius: 24px;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
}

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

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

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

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

/* ============================================
   Footer
   ============================================ */
.footer {
  background: #2c2416;
  color: rgba(255, 255, 255, 0.8);
  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: #fff;
  margin-bottom: 16px;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
}

.footer-title {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

/* ============================================
   Two Column Layout
   ============================================ */
.two-column {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 32px;
}

/* ============================================
   Pagination
   ============================================ */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 40px;
}

.page-btn {
  min-width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 12px;
  font-size: 14px;
  border: 1px solid var(--border-color);
  background: var(--card-bg);
  border-radius: var(--radius);
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.2s;
}

.page-btn:hover,
.page-btn.active {
  background: var(--primary-color);
  color: #fff;
  border-color: var(--primary-color);
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
  .two-column {
    grid-template-columns: 1fr;
  }

  .sidebar {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

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

@media (max-width: 768px) {
  .nav,
  .search-box {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .hero {
    padding: 60px 0;
  }

  .hero-title {
    font-size: 28px;
  }

  .hero-stats {
    gap: 30px;
    flex-wrap: wrap;
  }

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

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

  .article-list-item {
    flex-direction: column;
  }

  .article-list-image {
    width: 100%;
    height: 180px;
  }

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

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

  .article-container {
    padding: 24px;
  }

  .article-main-title {
    font-size: 22px;
  }

  .filter-bar {
    flex-wrap: wrap;
  }

  .filter-options {
    flex-wrap: wrap;
  }
}

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

  .hero-stats {
    gap: 20px;
  }

  .stat-num {
    font-size: 28px;
  }
}