/* ========================================
   钱币收藏 - 样式表
   主题: 语录风格 - 钱币收藏投资
   ======================================== */

/* CSS 变量 */
:root {
  --accent-color: #c9a227;
  --accent-dark: #a88420;
  --bg-primary: #1a1a2e;
  --bg-secondary: #16213e;
  --bg-card: #0f3460;
  --text-primary: #eaeaea;
  --text-secondary: #a0a0a0;
  --text-muted: #6c757d;
  --border-color: #2d4059;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  --radius: 8px;
  --max-width: 1200px;
  --font-serif: Georgia, "Times New Roman", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

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

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--accent-color);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--text-primary);
}

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

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

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-color);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo::before {
  content: "◆";
  font-size: 1.2rem;
}

.nav {
  display: flex;
  gap: 2rem;
}

.nav a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.5rem 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-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 0.5rem 1rem;
  gap: 0.5rem;
}

.search-box input {
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 0.9rem;
  width: 180px;
  outline: none;
}

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

.search-box button {
  background: none;
  border: none;
  color: var(--accent-color);
  cursor: pointer;
  font-size: 1rem;
}

/* ========================================
   主内容区
   ======================================== */
.main {
  min-height: calc(100vh - 200px);
  padding: 2rem 0;
}

/* ========================================
   精选展示 (Featured)
   ======================================== */
.featured {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-card) 100%);
  border-radius: var(--radius);
  padding: 3rem;
  margin-bottom: 3rem;
  text-align: center;
  border: 1px solid var(--border-color);
}

.featured-label {
  display: inline-block;
  background: var(--accent-color);
  color: var(--bg-primary);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 0.4rem 1rem;
  border-radius: 20px;
  margin-bottom: 1.5rem;
}

.featured-title {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 400;
  line-height: 1.4;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.featured-meta {
  color: var(--accent-color);
  font-size: 1rem;
  margin-bottom: 1.5rem;
}

.featured-desc {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto 1.5rem;
}

.featured-link {
  display: inline-block;
  background: var(--accent-color);
  color: var(--bg-primary);
  padding: 0.75rem 2rem;
  border-radius: var(--radius);
  font-weight: 600;
  transition: all 0.3s ease;
}

.featured-link:hover {
  background: var(--accent-dark);
  color: var(--bg-primary);
}

/* ========================================
   区块标题
   ======================================== */
.section-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--accent-color);
  display: inline-block;
}

/* ========================================
   卡片网格
   ======================================== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: all 0.3s ease;
}

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

.card-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  line-height: 1.5;
}

.card-title a {
  color: inherit;
}

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

.card-meta {
  font-size: 0.85rem;
  color: var(--accent-color);
  margin-bottom: 0.75rem;
}

.card-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ========================================
   分类标签
   ======================================== */
.category-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 3rem;
}

.category-tag {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 0.75rem 1.25rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: all 0.3s ease;
}

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

/* ========================================
   三栏布局
   ======================================== */
.three-columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 3rem;
}

.column-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

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

.column-list li {
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border-color);
}

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

.column-list a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

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

/* ========================================
   面包屑
   ======================================== */
.breadcrumb {
  background: var(--bg-secondary);
  border-radius: var(--radius);
  padding: 1rem 1.5rem;
  margin-bottom: 2rem;
  font-size: 0.9rem;
}

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

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

.breadcrumb span {
  color: var(--text-muted);
  margin: 0 0.5rem;
}

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

/* ========================================
   页面头部
   ======================================== */
.page-header {
  text-align: center;
  padding: 2rem 0 3rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
}

.page-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 400;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.page-desc {
  color: var(--text-secondary);
  font-size: 1rem;
}

.page-stats {
  color: var(--accent-color);
  font-size: 0.9rem;
  margin-top: 0.5rem;
}

/* ========================================
   文章列表
   ======================================== */
.article-list {
  margin-bottom: 2rem;
}

.article-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1rem;
  transition: all 0.3s ease;
}

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

.article-item-title {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

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

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

.article-item-meta {
  font-size: 0.85rem;
  color: var(--accent-color);
  margin-bottom: 0.75rem;
}

.article-item-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ========================================
   分页
   ======================================== */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  margin: 3rem 0;
}

.pagination a,
.pagination span {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 0.75rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: all 0.3s ease;
}

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

.pagination .current {
  background: var(--accent-color);
  border-color: var(--accent-color);
  color: var(--bg-primary);
  font-weight: 600;
}

.pagination .disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ========================================
   文章详情
   ======================================== */
.article-detail {
  max-width: 800px;
  margin: 0 auto;
}

.article-header {
  text-align: center;
  padding: 2rem 0 3rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
}

.article-header .featured-label {
  margin-bottom: 1rem;
}

.article-header h1 {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 400;
  line-height: 1.4;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
}

.article-header .article-meta {
  color: var(--accent-color);
  font-size: 1rem;
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

.article-content p {
  margin-bottom: 1.5rem;
}

.article-content h2 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--text-primary);
  margin: 2.5rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.article-content h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 2rem 0 1rem;
}

.article-content ul,
.article-content ol {
  margin-bottom: 1.5rem;
  padding-left: 2rem;
}

.article-content li {
  margin-bottom: 0.5rem;
}

.article-content blockquote {
  background: var(--bg-secondary);
  border-left: 4px solid var(--accent-color);
  padding: 1.5rem;
  margin: 2rem 0;
  font-style: italic;
  color: var(--text-primary);
}

.article-content blockquote p:last-child {
  margin-bottom: 0;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.article-tag {
  background: var(--bg-card);
  padding: 0.4rem 0.8rem;
  border-radius: 4px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ========================================
   相关内容
   ======================================== */
.related-section {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

/* ========================================
   404 页面
   ======================================== */
.error-page {
  text-align: center;
  padding: 5rem 0;
}

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

.error-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.error-desc {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 2rem;
}

.error-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
}

.btn {
  display: inline-block;
  padding: 0.75rem 2rem;
  border-radius: var(--radius);
  font-weight: 500;
  transition: all 0.3s ease;
}

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

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

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

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

/* ========================================
   页脚
   ======================================== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 2rem 0;
  margin-top: 3rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

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

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

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

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 992px) {
  .three-columns {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .featured {
    padding: 2rem;
  }

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

@media (max-width: 768px) {
  .header-inner {
    flex-wrap: wrap;
  }

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

  .search-box {
    flex: 1;
    max-width: 200px;
  }

  .search-box input {
    width: 100%;
  }

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

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

  .featured {
    padding: 1.5rem;
  }

  .featured-title {
    font-size: 1.4rem;
  }

  .page-title,
  .article-header h1 {
    font-size: 1.5rem;
  }

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

  .error-actions {
    flex-direction: column;
    align-items: center;
  }

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

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

  .category-tags {
    justify-content: center;
  }

  .pagination a,
  .pagination span {
    min-width: 36px;
    height: 36px;
    font-size: 0.85rem;
  }
}