今天主要學習CSS3中的邊框(Border). 這對我們來說並不陌生.多少次寫下 border:1px solid red了..那麼CSS3中會給我們帶來什麼驚喜呢？
在CSS3中.邊框多了4種新功能
Border-color(設定邊框顏色)
Border-image(透過圖片設定為邊框)
Border-radius(邊框的半徑)
box-shadow(陰影效果)
用CSS3，你可以建立圓角邊框，加入陰影框，並作為邊界的圖像而不使用設計程式
##CSS3圓角border-radius屬性
CSS3圓角只需設定一個屬性：border-radius（意義是"邊框半徑"）。你為這個屬性提供一個值，就能同時設定四個圓角的半徑。所有合法的CSS度量值都可以使用：em、ex、pt、px、百分比等等。
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php中文网(php.cn)</title>
<style type="text/css">
div
{
border:2px solid #a1a1a1;
padding:10px 40px;
background:yellow;
width:300px;
height:300px;
border-radius:25px 15px 40px 0;
}
</style>
</head>
<body>
<div>观察4个角的不同 </div>
</body>
</html>CSS3盒子陰影box-shadow屬性#
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php中文网(php.cn)</title>
<style type="text/css">
.border_test
{
border:5px solid red;
-moz-box-shadow:5px 2px 6px black;
-ms-box-shadow:5px 2px 6px black;
-wekit-box-shadow:5px 2px 6px black;
-o-box-shadow:5px 2px 6px black;
box-shadow:5px 2px 6px black;
}
</style>
</head>
<body>
<div class='border_test'>CSS3 Border-shadow样式</div>
</body>
</html>CSS3邊界圖片Border-image
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php中文网(php.cn)</title>
<style type="text/css">
.border_test
{
-webkit-border-image: url(http://pic002.cnblogs.com/images/2012/455414/2012101316502564.jpg) 0 12 0 12 stretch stretch;
-moz-border-image: url(http://pic002.cnblogs.com/images/2012/455414/2012101316502564.jpg) 0 12 0 12 stretch stretch;
-o-border-image: url(http://pic002.cnblogs.com/images/2012/455414/2012101316502564.jpg) 0 12 0 12 stretch stretch;
-ms-border-image: url(http://pic002.cnblogs.com/images/2012/455414/2012101316502564.jpg) 0 12 0 12 stretch stretch;
-border-image: url(http://pic002.cnblogs.com/images/2012/455414/2012101316502564.jpg) 0 12 0 12 stretch stretch;
display: block;
border-width: 0 12px;
padding: 10px;
text-align: center;
font-size: 26px;
text-decoration: inherit;
color:white;
}
</style>
</head>
<body>
<div class='border_test'>CSS3 Border-image样式</div>
</body>
</html>