<style type="text/css">.header{????height: 40px;????width:100%;????position: fixed;}.header_bg{????height: 40px;????width:100%;????opacity: 0.3;????background:#000;}.header .nav{????display: inline-block;????margin-top: -40px;????float: right;}.header .nav a{????padding-right: 20px;????color:#fff;????font-size: 14px;????line-height: 40px;}</style><div class="header">????<div>????????<div class="header_bg"></div>????</div>????<div class="nav">????????<a href="#">網(wǎng)頁</a>????????<a href="#">新聞</a>????????<a href="#">貼吧</a>????</div></div>