/* ============================================
   静态资讯网站 - 全站共享样式
   风格：简约现代
   ============================================ */

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

:root {
  /* 颜色系统 */
  --color-bg: #ffffff;
  --color-bg-secondary: #f8f9fa;
  --color-bg-hover: #f1f3f5;
  --color-text: #1a1a2e;
  --color-text-secondary: #5a6170;
  --color-text-muted: #8b919e;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-accent-light: #eff6ff;
  --color-border: #e5e7eb;
  --color-border-light: #f0f0f0;
  --color-tag-ai: #7c3aed;
  --color-tag-ai-bg: #f5f3ff;
  --color-tag-case: #059669;
  --color-tag-case-bg: #ecfdf5;

  /* 间距系统 */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* 阴影 */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);

  /* 宽度 */
  --max-width: 1200px;
  --content-width: 720px;
  --nav-height: 60px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

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

/* --- 导航栏 --- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border-light);
}

.navbar-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-logo {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.5px;
}

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

.navbar-links {
  display: flex;
  gap: var(--spacing-xs);
}

.navbar-links a {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.navbar-links a:hover {
  color: var(--color-accent);
  background: var(--color-accent-light);
}

.navbar-links a.active {
  color: var(--color-accent);
  background: var(--color-accent-light);
}

/* --- 主内容区 --- */
.main {
  flex: 1;
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-lg);
}

/* --- 页面标题区 --- */
.page-header {
  margin-bottom: var(--spacing-2xl);
}

.page-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.5px;
}

.page-desc {
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* --- 介绍区 --- */
.hero {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
  border: 1px solid var(--color-border-light);
}

.hero h2 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

.hero p {
  color: var(--color-text-secondary);
  line-height: 1.8;
  font-size: 1rem;
}

/* --- 分类标签 --- */
.filter-bar {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
}

.filter-tag {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.filter-tag:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.filter-tag.active {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

/* --- 文章卡片 --- */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.article-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: all 0.25s ease;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  color: inherit;
}

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

.article-card-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.5;
  margin-bottom: var(--spacing-xs);
}

.article-card-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.article-card-summary {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* --- 分类标签徽章 --- */
.tag {
  display: inline-block;
  padding: 2px 10px;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: 12px;
  line-height: 1.6;
}

.tag-ai {
  color: var(--color-tag-ai);
  background: var(--color-tag-ai-bg);
}

.tag-case {
  color: var(--color-tag-case);
  background: var(--color-tag-case-bg);
}

/* --- 文章列表（紧凑模式） --- */
.article-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.article-list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--color-border-light);
  gap: var(--spacing-md);
  transition: background 0.15s ease;
  color: inherit;
}

.article-list-item:hover {
  background: var(--color-bg-hover);
  margin: 0 calc(var(--spacing-lg) * -1);
  padding-left: var(--spacing-lg);
  padding-right: var(--spacing-lg);
  border-radius: var(--radius-sm);
}

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

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

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

.article-list-item-info {
  flex: 1;
  min-width: 0;
}

.article-list-item-title {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

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

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

.article-list-item-meta {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.article-list-item-date {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  white-space: nowrap;
}

/* --- 月份分组标题 --- */
.month-group-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--color-accent);
  display: inline-block;
}

/* --- 文章详情页 --- */
.article-detail {
  max-width: var(--content-width);
  margin: 0 auto;
}

.article-detail-header {
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border-light);
}

.article-detail-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.4;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.3px;
}

.article-detail-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.article-detail-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--color-text);
}

.article-detail-content p {
  margin-bottom: var(--spacing-md);
}

.article-detail-content h2 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

.article-detail-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.article-detail-content ul,
.article-detail-content ol {
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-lg);
}

.article-detail-content li {
  margin-bottom: var(--spacing-xs);
}

.article-detail-content blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: var(--spacing-md);
  margin: var(--spacing-lg) 0;
  color: var(--color-text-secondary);
  font-style: italic;
}

.article-detail-content code {
  background: var(--color-bg-secondary);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
  font-family: "SF Mono", "Fira Code", monospace;
}

.article-detail-content pre {
  background: var(--color-bg-secondary);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-bottom: var(--spacing-md);
}

/* --- 上下篇导航 --- */
.article-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--spacing-3xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border-light);
  gap: var(--spacing-md);
}

.article-nav-link {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
  transition: all 0.2s ease;
  min-width: 0;
}

.article-nav-link:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-light);
}

.article-nav-link.prev {
  align-items: flex-start;
}

.article-nav-link.next {
  align-items: flex-end;
  text-align: right;
}

.article-nav-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 2px;
}

.article-nav-title {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

.article-nav-link:hover .article-nav-title {
  color: var(--color-accent);
}

/* --- 分页导航 --- */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border-light);
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 var(--spacing-sm);
  font-size: 0.9rem;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.pagination a {
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

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

.pagination .current {
  background: var(--color-accent);
  color: #fff;
  font-weight: 600;
}

.pagination .disabled {
  color: var(--color-text-muted);
  cursor: not-allowed;
}

/* --- 页脚 --- */
.footer {
  border-top: 1px solid var(--color-border-light);
  padding: var(--spacing-lg);
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: auto;
}

/* --- 空状态 --- */
.empty-state {
  text-align: center;
  padding: var(--spacing-3xl) var(--spacing-lg);
  color: var(--color-text-muted);
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.empty-state-text {
  font-size: 1rem;
}

/* ============================================
   首页专属样式
   ============================================ */

/* --- Hero 横幅区 --- */
.hero-banner {
  background: linear-gradient(135deg, #eef2ff 0%, #f5f3ff 50%, #fdf2f8 100%);
  border-radius: var(--radius-lg);
  padding: var(--spacing-3xl) var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
  position: relative;
  overflow: hidden;
  border: 1px solid var(--color-border-light);
}

.hero-banner::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -10%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.06) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-banner::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -5%;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.05) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.hero-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.5px;
  line-height: 1.3;
}

.hero-title-accent {
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  max-width: 480px;
  margin: 0 auto;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  margin-top: var(--spacing-lg);
}

.hero-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all 0.25s ease;
  cursor: pointer;
  text-decoration: none;
}

.hero-btn-primary {
  background: var(--color-accent);
  color: #fff;
  border: 1px solid var(--color-accent);
}

.hero-btn-primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.hero-btn-secondary {
  background: transparent;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
}

.hero-btn-secondary:hover {
  background: var(--color-accent-light);
  color: var(--color-accent);
  transform: translateY(-2px);
}

.hero-decoration {
  margin-top: var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

.hero-decoration-line {
  width: 40px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
  border-radius: 1px;
}

.hero-decoration-dot {
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
  opacity: 0.6;
}

/* --- 数据概览条 --- */
.stats-bar {
  display: flex;
  justify-content: center;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
  padding: var(--spacing-lg);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
}

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

.stat-number {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 2px;
}

/* --- 分类入口卡片 --- */
.category-section {
  margin-bottom: var(--spacing-2xl);
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}

.category-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  background: var(--color-bg);
  transition: all 0.25s ease;
  cursor: pointer;
  text-decoration: none;
}

.category-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.category-card-ai {
  border-left: 4px solid var(--color-tag-ai);
}

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

.category-card-case {
  border-left: 4px solid var(--color-tag-case);
}

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

.category-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.category-card-ai .category-icon {
  background: var(--color-tag-ai-bg);
}

.category-card-case .category-icon {
  background: var(--color-tag-case-bg);
}

.category-info {
  flex: 1;
}

.category-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 2px;
}

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

.category-arrow {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  transition: transform 0.2s ease;
}

.category-card:hover .category-arrow {
  transform: translateX(3px);
  color: var(--color-accent);
}

/* --- 文章卡片（增强：左侧色条） --- */
.article-card {
  border-left: 4px solid var(--color-border);
}

.article-card.tag-ai-card {
  border-left-color: var(--color-tag-ai);
}

.article-card.tag-case-card {
  border-left-color: var(--color-tag-case);
}

/* --- 查看全部链接 --- */
.view-all {
  text-align: center;
  margin-top: var(--spacing-xl);
}

.view-all a {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-accent);
  border: 1px solid var(--color-border);
  border-radius: 24px;
  transition: all 0.25s ease;
}

.view-all a:hover {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
  transform: translateX(2px);
}

.view-all-arrow {
  transition: transform 0.2s ease;
}

.view-all a:hover .view-all-arrow {
  transform: translateX(4px);
}

/* --- 增强页脚 --- */
.footer {
  border-top: 1px solid var(--color-border-light);
  padding: var(--spacing-xl) var(--spacing-lg);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-links {
  display: flex;
  gap: var(--spacing-md);
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  transition: color 0.2s ease;
}

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

.footer-copy {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.footer-contact {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.footer-links {
  display: flex;
  gap: var(--spacing-md);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  transition: color 0.2s ease;
}
.contact-name {
  color: var(--color-accent);
  font-weight: 500;
}

/* --- 响应式设计（首页补充） --- */
@media (max-width: 768px) {
  .hero-banner {
    padding: var(--spacing-2xl) var(--spacing-lg);
  }

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

  .hero-subtitle {
    font-size: 0.95rem;
  }

  .stats-bar {
    gap: var(--spacing-lg);
    padding: var(--spacing-md);
  }

  .stat-number {
    font-size: 1.2rem;
  }

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

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

/* --- 原有响应式设计 --- */
@media (max-width: 768px) {
  :root {
    --nav-height: 52px;
  }

  .navbar-inner {
    padding: 0 var(--spacing-md);
  }

  .navbar-logo {
    font-size: 1.05rem;
  }

  .navbar-links a {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.85rem;
  }

  .main {
    padding: var(--spacing-lg) var(--spacing-md);
  }

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

  .hero {
    padding: var(--spacing-lg);
  }

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

  .article-detail-title {
    font-size: 1.3rem;
  }

  .article-detail-content {
    font-size: 1rem;
  }

  .article-nav {
    flex-direction: column;
  }

  .article-nav-link.prev,
  .article-nav-link.next {
    align-items: flex-start;
    text-align: left;
  }

  .article-list-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
  }
}

@media (max-width: 480px) {
  .navbar-links {
    gap: 0;
  }

  .navbar-links a {
    padding: var(--spacing-xs) 10px;
    font-size: 0.8rem;
  }

  .filter-bar {
    gap: var(--spacing-xs);
  }

  .filter-tag {
    font-size: 0.8rem;
    padding: 4px 10px;
  }
}