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<!DOCTYPE html>
<html>
<head>
<style> 
#example1 {
  background-color: lightblue;
  height: 100px;
  width: 200px;
  border-start-end-radius: 50px;
}
#example2 {
  background-color: lightblue;
  height: 100px;
  width: 200px;
  border-start-end-radius: 50px 20px;
}
#example3 {
  background-color: lightblue;
  height: 100px;
  width: 200px;
  border-start-end-radius: 50%;
  direction: rtl;
}  
#example4 {
  background-color: lightblue;
  height: 100px;
  width: 200px;
  border-start-end-radius: 50%;
  writing-mode: vertical-rl;
}
</style>
</head>
<body>
<h1>border-start-end-radius 属性</h1>
<p>border-start-end-radius 属性定义元素块级起始边和行内末端边之间角的半径。</p>
<div id="example1">
  <p>border-start-end-radius: 50px;</p>
</div>
<br>
<div id="example2">
  <p>border-start-end-radius: 50px 20px;</p>
</div>
<br>
<div id="example3">
  <p>border-start-end-radius: 50% 和 direction: rtl</p>
</div>
<br>
<div id="example4">
  <p>border-start-end-radius: 50% 和 writing mode: vertical-rl;</p>
</div>
</body>
</html>