body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;max-width:960px;margin:auto;padding:40px;background:#fafbfc;color:#1f2937;line-height:1.8}nav a{margin-right:18px;color:#2563eb;text-decoration:none}h1{font-size:52px}footer{margin-top:60px;padding-top:20px;border-top:1px solid #ddd;color:#666}.card{border:1px solid #ddd;border-radius:10px;padding:20px;margin:20px 0;background:#fff}.tag{display:inline-block;background:#eef4ff;color:#2563eb;padding:4px 10px;border-radius:20px;margin:3px;font-size:.9em}