摘要：
<style type="text/css"> html, body { margin: 0; padding: 30px 10px; text-align: center; } #outer { width: 780px; margin: auto; text-align: left; border: 1px solid #000; } #outer { overflow: hidden; position: relative; } .navwrap { float: left; position: relative; left: 50%; text-alig 阅读全文
