/* article.css - 程序员谈天 统一文章样式 */
/* 所有文章页引用: <link rel="stylesheet" href="/article.css"> */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;700&display=swap');

/* ===== Reset ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { background: #f8f9fa; -webkit-font-smoothing: antialiased; }

/* ===== Sticky Nav ===== */
.article-nav {
  background: #fff;
  border-bottom: 1px solid #e8eaed;
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  height: 52px;
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 14px;
}
.article-nav a { color: #5f6368; text-decoration: none; font-weight: 500; }
.article-nav a:hover { color: #1a73e8; }
.article-nav .nav-brand { font-weight: 700; color: #202124; font-size: 15px; }

/* ===== Article Container ===== */
.article-container {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 24px 60px;
  font-family: -apple-system, 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: #333;
}

/* ===== Typography ===== */
.article-container h1 {
  font-size: 24px; font-weight: bold; color: #1a1a1a;
  line-height: 1.4; margin-bottom: 16px;
}
.article-container h2 {
  font-size: 20px; font-weight: bold; color: #1a1a1a;
  border-left: 4px solid #ff6633; padding-left: 12px;
  margin-top: 36px; margin-bottom: 16px;
}
.article-container h3 {
  font-size: 17px; font-weight: bold; color: #333;
  margin-top: 28px; margin-bottom: 12px;
}
.article-container p { margin: 14px 0; }
.article-container strong { color: #c0392b; }
.article-container a { color: #1a73e8; text-decoration: none; }
.article-container a:hover { text-decoration: underline; }
.article-container code {
  background: #f3f4f6; padding: 2px 6px; border-radius: 3px;
  font-size: 0.9em; font-family: 'Fira Code', 'Consolas', monospace;
}
.article-container blockquote {
  border-left: 3px solid #ddd; padding: 10px 18px; margin: 16px 0;
  color: #888; font-size: 14px; background: #f9f9f9; border-radius: 4px;
}
.article-container hr { border: none; border-top: 1px solid #eee; margin: 32px 0; }

/* ===== Lists ===== */
.article-container ul, .article-container ol { padding-left: 20px; }
.article-container li { margin: 6px 0; }

/* ===== Images ===== */
.article-container img {
  max-width: 100%; border-radius: 6px; margin: 16px 0;
  display: block; box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.fig-caption {
  font-size: 13px; color: #888; margin-top: -8px; margin-bottom: 16px;
  font-style: italic; text-align: center;
}

/* ===== Tables ===== */
.article-container table {
  width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 14px;
  display: block; overflow-x: auto; -webkit-overflow-scrolling: touch;
}
.article-container th, .article-container td {
  border: 1px solid #ddd; padding: 10px 14px; text-align: left; white-space: nowrap;
}
.article-container th { background: #f5f5f5; font-weight: bold; }

/* ===== Callout Boxes ===== */
.highlight-box {
  background: #fff9f0; border: 1px solid #ffe0b2;
  border-radius: 8px; padding: 18px; margin: 20px 0;
}
.green-box {
  background: #f0fdf4; border: 1px solid #bbf7d0;
  border-radius: 8px; padding: 18px; margin: 20px 0;
}
.blue-box {
  background: #eff6ff; border: 1px solid #bfdbfe;
  border-radius: 8px; padding: 18px; margin: 20px 0;
}
.red-box {
  background: #fef2f2; border: 1px solid #fecaca;
  border-radius: 8px; padding: 18px; margin: 20px 0;
}

/* ===== Tags ===== */
.tag {
  display: inline-block; background: #f0f0f0; color: #666;
  font-size: 13px; padding: 3px 10px; border-radius: 12px; margin-right: 6px;
}

/* ===== Stat Grid ===== */
.stat-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px; margin: 16px 0;
}
.stat {
  background: #fff; border: 1px solid #e8eaed;
  border-radius: 8px; padding: 16px; text-align: center;
}
.stat .num { font-size: 28px; font-weight: 700; color: #1a73e8; }
.stat .label { font-size: 13px; color: #666; margin-top: 4px; }

/* ===== Highlight value in tables ===== */
.best { font-weight: 700; color: #1a73e8; }

/* ===== Footer ===== */
.footer {
  font-size: 13px; color: #aaa; text-align: center;
  margin-top: 32px; padding-top: 16px; border-top: 1px solid #eee;
}
.article-footer {
  background: #1a1a2e; color: rgba(255,255,255,0.7);
  text-align: center; padding: 32px 24px;
  font-size: 14px; font-family: 'Noto Sans SC', sans-serif;
}

/* ===== Responsive: Mobile ===== */
@media (max-width: 768px) {
  .article-container {
    padding: 20px 16px 48px;
    font-size: 15px;
  }
  .article-container h1 { font-size: 20px; }
  .article-container h2 { font-size: 18px; }
  .article-container h3 { font-size: 16px; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .stat .num { font-size: 22px; }
  .stat .label { font-size: 12px; }
  .article-container th, .article-container td { padding: 6px 8px; font-size: 13px; }
  .highlight-box, .green-box, .blue-box, .red-box { padding: 14px; }
  .article-nav { padding: 0 16px; gap: 12px; height: 48px; font-size: 13px; }
}

@media (max-width: 400px) {
  .article-container { padding: 16px 12px 40px; font-size: 14px; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .stat { padding: 12px 8px; }
  .stat .num { font-size: 20px; }
}