CSS

selector{
     property:value;  
}

<link type="text/css" rel="stylesheet" href="aaa.css"
<p style="font-size:15pt; color:red">xxx</p>

p li{
    color:red;
}

<p id="pid">aaa</p>

#pid{
   color:red;
}

<div class="divclass" >
       <a href="http://www.baidu.com">baidu</a>
</div>

.divclass a{
   color:red;
}

p,.aaa{
    color:red;  
}

[title]{
   color:red;
}
[title =ccc]{
   color:red;
}

<p title="aaa">xxx</p>
<p title="ccc">xxx</p>

p{
   width:200px;
   background-image:url(xxx.jpg);
}

background-repeat:no-repeat;
可选：repeat-x,repeat-y

@font-face{
   font-family:myfont;
   src:url();   /*引用第三方字体*/
}

div{
   font-family:myfont;
}

{font-style:normal}
{font-style:italic}

可选100~900，400 等同于 normal，而 700 等同于 bold。

可选underline,over-line,line-through,none

a:link{
    color:red;
}

a:visited{
    color:red;
}

a:hover{
   color:red;
}

a:active{
   color:red;
}

ul li{
   list-style-type:circle;
}

ul li{
   list-style-image:url("icon.gif");
}

#tb,tr,th,td{
   border:1px solid blue;
   text-align:center;
   background-color:red;
   color:blue;     文字颜色
}

折叠边框
#tb{
   border-collapse:collapse;
}