Why the referenced external style sheet is useless_html/css

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Why the referenced external style sheet is useless_html/css_WEB-ITnose

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Jun 24, 2016 pm 12:00 PM

externalQuote

这是 html

html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

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text

这是 css

@charset "utf-8";
/* CSS Document */

html{height:100%;border:none;}
body{height:100%;border:none;padding:0;margin:0;text-align:center;font-size:14px;color:#000;background-color:#FFF;}
div,ul,li,img{margin:0;padding:0;border:none;}
ul{list-style-type:none;}
table,input{font-size:12px;}
a:link{ color:#09F; text-decoration:none;  }
a:visited{ color:#09F; text-decoration:none;  }
a:hover{ color:#09F; text-decoration:none;  }
a:active{ color:#09F; text-decoration:none;  }

.mass{width:762px;}
.center{text-align:center;}
.clear{ clear:both;visibility:hidden;font-size:0px;}

回复讨论(解决方案)

怎么让这个框居中呢
css码

@charset "utf-8";
/* CSS Document */

html{height:100%;border:none;}
body{height:100%;border:none;padding:0;margin:0;text-align:center;font-size:14px;color:#000;background-color:#FFF;}
div,ul,li,img{margin:0;padding:0;border:none;}
ul{list-style-type:none;}
table,input{font-size:12px;}
a:link{ color:#09F; text-decoration:none;  }
a:visited{ color:#09F; text-decoration:none;  }
a:hover{ color:#09F; text-decoration:none;  }
a:active{ color:#09F; text-decoration:none;  }

.mass{width:1024px;}
.center{text-align:center;}
.clear{ clear:both;visibility:hidden;font-size:0px;}
.border{ border:#F00 solid 1px;}

html 码
html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

无标题文档

text

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