body{ font-size:19px; line-height: 2.5;}
#content div:nth-child(2n+1) {background: #89b0e1}
#content div:nth-child(2n+2) {background: #ddd}
#first h1 { color:#00f; }
#first h2 {  font-size:14px; }
#first p { font-size:12px; color:yellow; background: black;}
#first img { border:2px solid red; }
p { text-indent:2em; }
p.first {  font-size:12px; color:yellow;  
	
	 text-transform:capitalize;	 
	/*text-transform: uppercase;*/
}
p.decoration {}
p.decoration-example { text-decoration: underline; }
/*.decoration-example em { text-decoration: none; }*//*无效*/
p.decoration-example em { text-decoration: overline; 
	 /*text-decoration: line-through;*/
}
p.align{text-align:center;}

p.spacing {word-spacing: 1em;}

p.white{ white-space: pre-wrap; }

div.height { font-size:14px;}
.height p {font-size:20px;}

#content img {  border:2px solid red; width:300px; height:200px;}