1、首页调用标题、关键词、描述
<title>{eyou:global name='web_title' /}</title>
<meta name="description" content="{eyou:global name='web_description' /}" />
<meta name="keywords" content="{eyou:global name='web_keywords' /}" />
2、列表页和内容页调用标题、关键词、描述
<title>{$eyou.field.seo_title}</title>
<meta name="description" content="{$eyou.field.seo_description}" />
<meta name="keywords" content="{$eyou.field.seo_keywords}" />
