/* 稀有乐器 - 样式表
 * www.animigedan.cn - 专注于稀有乐器收藏、鉴赏与文化传承
 */

/* ===== CSS 变量 ===== */
:root {
  --primary-color: #8B4513;
  --accent-color: #D4A574;
  --text-primary: #333333;
  --text-secondary: #666666;
  --text-muted: #999999;
  --bg-primary: #FDF8F3;
  --bg-secondary: #FFFFFF;
  --bg-dark: #2C2416;
  --border-color: #E8DDD0;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.12);
  --radius: 8px;
  --radius-lg: 12px;
  --max-width: 1200px;
  --header-height: 64px;
}

/* ===== 重置与基础 ===== */
*, *::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", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
}

a {
  color: inherit;
  text-decoration: none;
}

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

ul {
  list-style: none;
}

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

.section {
  padding: 48px 0;
}

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

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

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
}

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

.nav {
  display: flex;
  gap: 32px;
}

.nav a {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  transition: color 0.2s;
}

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

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

.search-box input {
  border: none;
  background: transparent;
  outline: none;
  flex: 1;
  font-size: 0.875rem;
  color: var(--text-primary);
}

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

.search-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1rem;
}

/* ===== Hero区域 ===== */
.hero {
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--primary-color) 100%);
  color: #fff;
  padding: 80px 0;
  text-align: center;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.hero-desc {
  font-size: 1.125rem;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto 32px;
}

.hero-search {
  max-width: 560px;
  margin: 0 auto;
  display: flex;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 32px;
  padding: 6px;
  backdrop-filter: blur(8px);
}

.hero-search input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 12px 20px;
  font-size: 1rem;
  color: #fff;
  outline: none;
}

.hero-search input::placeholder {
  color: rgba(255, 255, 255, 0.6);
}

.hero-search button {
  background: #fff;
  border: none;
  padding: 12px 32px;
  border-radius: 24px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--primary-color);
  cursor: pointer;
  transition: transform 0.2s;
}

.hero-search button:hover {
  transform: scale(1.02);
}

/* ===== 分类标签 ===== */
.category-tags {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 32px;
}

.tag {
  padding: 10px 24px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 24px;
  font-size: 0.9375rem;
  transition: all 0.2s;
}

.tag:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* ===== 区块标题 ===== */
.section-header {
  text-align: center;
  margin-bottom: 40px;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

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

.card {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}

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

.card-image {
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, var(--border-color) 0%, var(--accent-color) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
  font-size: 3rem;
}

.card-body {
  padding: 20px;
}

.card-category {
  font-size: 0.75rem;
  color: var(--accent-color);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.4;
}

.card-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

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

/* ===== 列表样式 ===== */
.list-section {
  background: var(--bg-secondary);
}

.list-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.list-column h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--accent-color);
  display: inline-block;
}

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

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

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

.list-item-num {
  width: 24px;
  height: 24px;
  background: var(--accent-color);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
  flex-shrink: 0;
}

.list-item-content h4 {
  font-size: 0.9375rem;
  font-weight: 500;
  margin-bottom: 4px;
}

.list-item-content p {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

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

.breadcrumb ol {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

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

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

/* ===== 页面头部 ===== */
.page-header {
  background: var(--bg-secondary);
  padding: 40px 0;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
}

.page-title {
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.page-desc {
  color: var(--text-secondary);
}

/* ===== 排序选项 ===== */
.sort-bar {
  display: flex;
  justify-content: center;
  gap: 24px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 32px;
}

.sort-option {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: color 0.2s;
}

.sort-option:hover,
.sort-option.active {
  color: var(--primary-color);
}

/* ===== 内容列表 ===== */
.content-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.content-item {
  display: flex;
  gap: 20px;
  background: var(--bg-secondary);
  padding: 20px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  transition: box-shadow 0.2s;
}

.content-item:hover {
  box-shadow: var(--shadow-hover);
}

.content-thumb {
  width: 120px;
  height: 80px;
  background: linear-gradient(135deg, var(--border-color) 0%, var(--accent-color) 100%);
  border-radius: var(--radius);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
  font-size: 2rem;
}

.content-info {
  flex: 1;
}

.content-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.content-meta {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.content-excerpt {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

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

.page-btn,
.page-num {
  min-width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  font-size: 0.9375rem;
  transition: all 0.2s;
}

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

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

.page-num {
  background: var(--bg-secondary);
}

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

/* ===== 文章页 ===== */
.article-header {
  text-align: center;
  padding: 48px 0 32px;
}

.article-cover {
  width: 200px;
  height: 200px;
  background: linear-gradient(135deg, var(--border-color) 0%, var(--accent-color) 100%);
  border-radius: var(--radius-lg);
  margin: 0 auto 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
  font-size: 4rem;
}

.article-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.article-meta {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

.article-meta span {
  margin: 0 8px;
}

.article-info {
  background: var(--bg-secondary);
  padding: 20px 24px;
  border-radius: var(--radius-lg);
  margin-bottom: 32px;
}

.article-info h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.article-info ul {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.article-info li {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.article-info li strong {
  color: var(--text-primary);
}

.article-content {
  background: var(--bg-secondary);
  padding: 40px;
  border-radius: var(--radius-lg);
  line-height: 1.8;
}

.article-content h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 32px 0 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.article-content h2:first-child {
  margin-top: 0;
}

.article-content p {
  margin-bottom: 16px;
  color: var(--text-secondary);
}

/* ===== 相关推荐 ===== */
.related-section {
  margin-top: 48px;
}

.related-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.related-item {
  background: var(--bg-secondary);
  padding: 16px;
  border-radius: var(--radius);
  text-align: center;
  transition: transform 0.2s;
}

.related-item:hover {
  transform: translateY(-2px);
}

.related-thumb {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--border-color) 0%, var(--accent-color) 100%);
  border-radius: var(--radius);
  margin: 0 auto 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
  font-size: 2rem;
}

.related-item h4 {
  font-size: 0.9375rem;
  font-weight: 500;
}

/* ===== 404页面 ===== */
.error-page {
  min-height: calc(100vh - var(--header-height) - 300px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 20px;
}

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

.error-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 12px;
}

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

.error-btn {
  display: inline-block;
  padding: 12px 32px;
  background: var(--primary-color);
  color: #fff;
  border-radius: 24px;
  font-weight: 500;
  transition: background 0.2s;
}

.error-btn:hover {
  background: var(--accent-color);
}

/* ===== 页脚 ===== */
.footer {
  background: var(--bg-dark);
  color: rgba(255, 255, 255, 0.8);
  padding: 48px 0 24px;
  margin-top: 64px;
}

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

.footer-brand .logo {
  color: #fff;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 0.875rem;
  opacity: 0.8;
  line-height: 1.6;
}

.footer-column h4 {
  color: #fff;
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 16px;
}

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

.footer-column a {
  font-size: 0.875rem;
  opacity: 0.8;
  transition: opacity 0.2s;
}

.footer-column a:hover {
  opacity: 1;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  text-align: center;
  font-size: 0.8125rem;
  opacity: 0.6;
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
  .list-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .search-box {
    width: auto;
    padding: 8px 12px;
  }

  .search-box input {
    display: none;
  }

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

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

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

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

  .content-item {
    flex-direction: column;
  }

  .content-thumb {
    width: 100%;
    height: 160px;
  }

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

  .article-content {
    padding: 24px;
  }

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

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

@media (max-width: 480px) {
  .hero {
    padding: 48px 0;
  }

  .hero-search {
    flex-direction: column;
    background: transparent;
    gap: 12px;
  }

  .hero-search input {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 24px;
  }

  .category-tags {
    gap: 8px;
  }

  .tag {
    padding: 8px 16px;
    font-size: 0.875rem;
  }

  .section {
    padding: 32px 0;
  }

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