边框圆角 border-end-start-radius 属性

实例代码

<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>border-end-start-radius 属性示例</title>
    <style>
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
            padding: 20px;
            max-width: 800px;
            margin: 0 auto;
            line-height: 1.6;
            color: #333;
        }
        
        h1, h2, h3 {
            color: #2c3e50;
        }
        
        h1 {
            font-size: 1.8rem;
            margin-bottom: 1.5rem;
        }
        
        h2 {
            font-size: 1.5rem;
            margin: 2rem 0 1rem;
            border-bottom: 1px solid #e0e0e0;
            padding-bottom: 0.5rem;
        }
        
        h3 {
            font-size: 1.2rem;
            margin: 1.5rem 0 0.8rem;
        }
        
        .box {
            width: 150px;
            height: 100px;
            margin: 20px auto;
            background-color: #a8d8ea;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 15px;
            color: #333;
            font-weight: 500;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }
        
        .example {
            margin-bottom: 40px;
            border: 1px solid #e0e0e0;
            padding: 20px;
            border-radius: 8px;
            background-color: #f9f9f9;
        }
        
        .code {
            background-color: #f0f0f0;
            padding: 12px;
            border-radius: 4px;
            font-family: 'Courier New', Courier, monospace;
            font-size: 15px;
            margin: 15px 0;
            overflow-x: auto;
            line-height: 1.4;
        }
        
        p {
            margin: 0.8rem 0;
        }
        
        .note {
            background-color: #fff8e1;
            padding: 10px 15px;
            border-left: 4px solid #ffc107;
            margin: 15px 0;
        }
        
        @media (max-width: 600px) {
            body {
                padding: 15px;
            }
            
            .example {
                padding: 15px;
            }
            
            .box {
                width: 120px;
                height: 80px;
                font-size: 0.9rem;
            }
        }
    </style>
</head>
<body>
    <header>
        <h1>border-end-start-radius 属性示例</h1>
        <p>本页面展示 CSS <code>border-end-start-radius</code> 属性的不同用法和效果。</p>
    </header>
    
    <main>
        <section class="example" aria-labelledby="example1-title">
            <h2 id="example1-title">1. 基本圆角 (50px)</h2>
            <div class="code">border-end-start-radius: 50px;</div>
            <div class="box" style="border-end-start-radius: 50px;">
                标准LTR方向
            </div>
            <p>在从左到右(LTR)的书写模式下，<code>border-end-start-radius</code> 作用于元素的右下角。</p>
        </section>
        
        <section class="example" aria-labelledby="example2-title">
            <h2 id="example2-title">2. 椭圆圆角 (50px/20px)</h2>
            <div class="code">border-end-start-radius: 50px 20px;</div>
            <div class="box" style="border-end-start-radius: 50px 20px;">
                椭圆形圆角
            </div>
            <p>当提供两个值时，第一个值表示水平半径，第二个值表示垂直半径，从而创建椭圆形圆角。</p>
        </section>
        
        <section class="example" aria-labelledby="example3-title">
            <h2 id="example3-title">3. RTL方向 (50%)</h2>
            <div class="code">border-end-start-radius: 50%;
direction: rtl;</div>
            <div class="box" style="border-end-start-radius: 50%; direction: rtl;">
                从右到左(RTL)
            </div>
            <p>在从右到左(RTL)的书写模式下，<code>border-end-start-radius</code> 作用于元素的左下角。</p>
            <div class="note">
                <strong>注意：</strong> 百分比值相对于元素的相应尺寸（宽度或高度）计算。
            </div>
        </section>
        
        <section class="example" aria-labelledby="example4-title">
            <h2 id="example4-title">4. 垂直书写模式 (50%)</h2>
            <div class="code">border-end-start-radius: 50%;
writing-mode: vertical-rl;</div>
            <div class="box" style="border-end-start-radius: 50%; writing-mode: vertical-rl;">
                垂直文本
            </div>
            <p>在垂直书写模式下（如 <code>vertical-rl</code>），<code>border-end-start-radius</code> 作用于元素的右上角。</p>
        </section>
    </main>
    
    <footer>
        <p>这些示例展示了 <code>border-end-start-radius</code> 如何根据书写模式和文本方向自动适应不同的角落。</p>
    </footer>
</body>
</html>