body, div, p, h1, h2, h3, h4, h5, h6, ul, ol, li, dl, dd, dt, img, form { padding:0px; margin:0px; border:0; font-size:14px; } h1, h2, h3, h4, h5, h6 { font-size:14px; font-weight:100; margin-top:0px !important; margin-bottom:0px !important;}
ul li {list-style:none;}
<span style="color: #000000;">a{text-decoration:none;} a:link,a:visited{ text-decoration:none; /*超链接无下划线*/ }</span>
<span style="color: #000000;">a:hover{ text-decoration:underline; /*鼠标放上去有下划线*/ }</span>