/*
 * AIHTO Theme — 主样式 v2
 * 深色科技资讯风格 | SEO 友好 | Core Web Vitals 优化
 * 字体: Inter (Google Fonts)
 */

/* ═══════════════════════════════════
   0. CSS 变量
   ═══════════════════════════════════ */
:root {
  --bg-primary: #060814;
  --bg-card: #0c0e1a;
  --bg-hover: #141626;
  --bg-surface: #0f1228;
  --text-primary: #e4e6f0;
  --text-secondary: #8891a6;
  --accent: #4f7cff;
  --accent-hover: #6b8fff;
  --accent-subtle: rgba(79, 124, 255, 0.1);
  --border: #1e2035;
  --border-light: #282b42;
  --success: #34d399;
  --warning: #fbbf24;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  --content-width: 820px;
  --wide-width: 1200px;

  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;

  --header-h: 64px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.75;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 背景光晕层次 */
body::before {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background:
    radial-gradient(ellipse 600px 400px at 20% 10%, rgba(79, 124, 255, 0.04) 0%, transparent 70%),
    radial-gradient(ellipse 400px 600px at 80% 80%, rgba(79, 124, 255, 0.03) 0%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

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

/* ═══════════════════════════════════
   2. 站点头部
   ═══════════════════════════════════ */
.site-header {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: rgba(6, 8, 20, 0.92);
}

.site-header .wp-block-site-title a {
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
}

.site-header .wp-block-site-title a:hover {
  color: var(--accent);
}

/* 导航 */
.wp-block-navigation a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.25rem 0;
  position: relative;
}

.wp-block-navigation a:hover {
  color: var(--text-primary);
}

.wp-block-navigation a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform var(--transition-fast);
}

.wp-block-navigation a:hover::after {
  transform: scaleX(1);
}

/* ═══════════════════════════════════
   3. Hero 区域（首页置顶）
   ═══════════════════════════════════ */
.site-hero {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-surface) 50%, var(--bg-card) 100%);
  border: 1px solid var(--border);
  padding: 2.5rem;
  margin-bottom: 2.5rem;
  transition: border-color var(--transition-normal);
}

.site-hero:hover {
  border-color: var(--border-light);
}

.site-hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(79, 124, 255, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.site-hero .hero-label {
  display: inline-block;
  background: var(--accent-subtle);
  color: var(--accent);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.25rem 0.75rem;
  border-radius: 100px;
  margin-bottom: 1rem;
}

.site-hero h2 {
  font-size: 1.75rem;
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.site-hero h2 a {
  color: var(--text-primary);
}

.site-hero h2 a:hover {
  color: var(--accent);
}

.site-hero .hero-excerpt {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  max-width: 600px;
  margin-bottom: 1rem;
}

.site-hero .hero-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.site-hero .hero-meta .hero-cat {
  background: rgba(79, 124, 255, 0.12);
  color: var(--accent);
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
}

/* ═══════════════════════════════════
   4. 文章卡片网格
   ═══════════════════════════════════ */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

/* 特色文章（大卡片） */
.article-card.featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  padding: 0;
  overflow: hidden;
}

.article-card.featured .card-body {
  padding: 1.5rem 1.5rem 1.5rem 0;
}

.article-card.featured .card-thumb {
  height: 100%;
  min-height: 200px;
  background: var(--bg-surface);
  border-radius: var(--radius-lg) 0 0 var(--radius-lg);
  overflow: hidden;
}

.article-card.featured .card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: all var(--transition-normal);
}

.article-card:hover {
  background: var(--bg-hover);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(79, 124, 255, 0.08);
}

.article-card .card-cat a {
  display: inline-block;
  background: var(--accent-subtle);
  color: var(--accent);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.article-card .card-cat a:hover {
  background: rgba(79, 124, 255, 0.2);
  color: var(--accent-hover);
}

.article-card .wp-block-post-title {
  font-size: 1.2rem;
  line-height: 1.4;
  margin: 0.6rem 0 0.5rem;
}

.article-card .wp-block-post-title a {
  color: var(--text-primary);
}

.article-card .wp-block-post-title a:hover {
  color: var(--accent);
}

.article-card .wp-block-post-excerpt {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.6;
}

.article-card .wp-block-post-excerpt__more-text a {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.8rem;
}

.article-card .wp-block-post-date {
  color: var(--text-secondary);
  font-size: 0.78rem;
}

/* ═══════════════════════════════════
   5. 文章详情页
   ═══════════════════════════════════ */
.article-header {
  text-align: center;
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

.article-header h1 {
  font-size: 2.25rem;
  line-height: 1.3;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 1rem 0;
}

.article-header .wp-block-post-author {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* 文章正文 */
.wp-block-post-content {
  font-size: 1.0625rem;
  line-height: 1.85;
}

.wp-block-post-content p {
  margin-bottom: 1.25rem;
}

.wp-block-post-content h2,
.wp-block-post-content h3 {
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.wp-block-post-content h2 {
  font-size: 1.5rem;
}

.wp-block-post-content h3 {
  font-size: 1.25rem;
}

.wp-block-post-content strong {
  color: var(--text-primary);
  font-weight: 600;
}

.wp-block-post-content a {
  text-decoration: underline;
  text-underline-offset: 2px;
}

.wp-block-post-content blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 1.25rem;
  margin: 2rem 0;
  color: var(--text-secondary);
  font-style: italic;
}

.wp-block-post-content ul,
.wp-block-post-content ol {
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
}

.wp-block-post-content li {
  margin-bottom: 0.5rem;
}

.wp-block-post-content img {
  border-radius: var(--radius-md);
  margin: 2rem auto;
}

.wp-block-post-content figcaption {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: -1rem;
  margin-bottom: 2rem;
}

/* 代码块 */
.wp-block-post-content pre {
  background: #0d0f1e;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin: 1.5rem 0;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  tab-size: 2;
}

.wp-block-post-content code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: rgba(79, 124, 255, 0.08);
  color: #e4e6f0;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
}

.wp-block-post-content pre code {
  background: none;
  padding: 0;
  border-radius: 0;
  font-size: inherit;
  color: inherit;
}

/* 行内代码标注 */
.wp-block-post-content :not(pre) > code {
  background: rgba(79, 124, 255, 0.08);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  white-space: nowrap;
}

/* 表格 */
.wp-block-post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
}

.wp-block-post-content th,
.wp-block-post-content td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.wp-block-post-content th {
  background: var(--bg-surface);
  font-weight: 600;
  color: var(--text-primary);
}

.wp-block-post-content tr:hover td {
  background: rgba(79, 124, 255, 0.03);
}

.wp-block-post-content tr:last-child td {
  border-bottom: none;
}

/* 文章标签 */
.article-tags {
  margin: 2.5rem 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.article-tags a {
  display: inline-block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.8rem;
  padding: 0.3rem 0.8rem;
  border-radius: 100px;
  transition: all var(--transition-fast);
}

.article-tags a:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-subtle);
}

/* 上一篇/下一篇 */
.wp-block-post-navigation-link {
  margin: 0.5rem 0;
}

.wp-block-post-navigation-link a {
  color: var(--accent);
  font-weight: 500;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.wp-block-post-navigation-link a:hover {
  color: var(--accent-hover);
  padding-left: 4px;
}

/* ═══════════════════════════════════
   6. 相关文章
   ═══════════════════════════════════ */
.related-posts {
  margin-top: 3rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--border);
}

.related-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

.related-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1rem;
  transition: all var(--transition-fast);
}

.related-card:hover {
  background: var(--bg-hover);
  border-color: var(--accent);
  transform: translateY(-1px);
}

.related-card img {
  border-radius: var(--radius-sm);
  margin-bottom: 0.75rem;
  aspect-ratio: 16/10;
  object-fit: cover;
}

.related-card-title {
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

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

.related-card-date {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* ═══════════════════════════════════
   7. 面包屑
   ═══════════════════════════════════ */
.breadcrumb {
  font-size: 0.8rem;
  color: var(--text-secondary);
  padding: 0.75rem 0;
}

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

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

.breadcrumb-sep {
  margin: 0 0.5rem;
  color: var(--border);
}

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

/* ═══════════════════════════════════
   8. 站点底部
   ═══════════════════════════════════ */
.site-footer {
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
}

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

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

/* ═══════════════════════════════════
   9. 分页
   ═══════════════════════════════════ */
.wp-block-query-pagination {
  margin-top: 2.5rem;
  gap: 0.5rem;
}

.wp-block-query-pagination a,
.wp-block-query-pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0.3rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  transition: all var(--transition-fast);
}

.wp-block-query-pagination a {
  color: var(--text-secondary);
  background: transparent;
}

.wp-block-query-pagination a:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-subtle);
}

.wp-block-query-pagination .current {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* ═══════════════════════════════════
   10. 搜索
   ═══════════════════════════════════ */
.wp-block-search__input {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  padding: 0.6rem 1rem;
  font-size: 0.9rem;
}

.wp-block-search__input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 124, 255, 0.12);
}

.wp-block-search__button {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  padding: 0.6rem 1.2rem;
  cursor: pointer;
  font-size: 0.85rem;
  transition: background var(--transition-fast);
}

.wp-block-search__button:hover {
  background: var(--accent-hover);
}

/* ═══════════════════════════════════
   11. 阅读进度条
   ═══════════════════════════════════ */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-hover));
  z-index: 999;
  transition: width 100ms linear;
}

/* ═══════════════════════════════════
   12. 返回顶部
   ═══════════════════════════════════ */
.back-to-top {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  z-index: 50;
  font-size: 1.1rem;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--bg-hover);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

/* ═══════════════════════════════════
   13. 工具类
   ═══════════════════════════════════ */
.has-text-secondary-color {
  color: var(--text-secondary);
}

.has-sm-font-size {
  font-size: 0.875rem;
}

.has-xs-font-size {
  font-size: 0.75rem;
}

/* 滚动条 */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

/* ═══════════════════════════════════
   14. Focus-visible 键盘导航
   ═══════════════════════════════════ */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* 默认 focus 只对键盘导航显示 */
:focus:not(:focus-visible) {
  outline: none;
}

/* ═══════════════════════════════════
   15. 降低动效
   ═══════════════════════════════════ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  html {
    scroll-behavior: auto;
  }

  .article-card:hover {
    transform: none;
  }
}

/* ═══════════════════════════════════
   16. 响应式
   ═══════════════════════════════════ */
@media (max-width: 768px) {
  .article-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

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

  .article-card.featured .card-body {
    padding: 1.25rem;
  }

  .article-card.featured .card-thumb {
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    min-height: 180px;
  }

  .article-header h1 {
    font-size: 1.625rem;
  }

  .wp-block-post-content {
    font-size: 1rem;
  }

  .site-hero {
    padding: 1.5rem;
  }

  .site-hero h2 {
    font-size: 1.35rem;
  }

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

  .site-header .wp-block-site-title a {
    font-size: 1.25rem;
  }
}

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

  .article-card {
    padding: 1rem;
  }
}

/* ═══════════════════════════════════
   17. 打印样式
   ═══════════════════════════════════ */
@media print {
  .site-header,
  .site-footer,
  .related-posts,
  .article-tags,
  .wp-block-post-navigation-link,
  .back-to-top,
  .reading-progress {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
    font-size: 12pt;
  }

  a {
    color: #000;
    text-decoration: underline;
  }

  .wp-block-post-content {
    font-size: 12pt;
  }
}