FROM
==========================================
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Bootstrap Layouts</title>
<link rel="stylesheet" href="styles/main.css">
</head>
<body>
</body>
</html>
==========================================
css style
<style>
.test {
background-color: red ;
}
//css media queries
@media (min-width: 600px) {
.test {
background-color: green ;
color : white ;
font-size: 24px ;
}
}
</style>
<div class="test">
test line
</div>
<header></header>
<smal></smal>
<footer></footer>
<span></span>
<p></p>
<br>
<b> 粗體
留言列表
