块方向末端的边框颜色位置受 writing-mode 属性影响

实例代码

<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <title>border-block-end-color 垂直模式演示</title>
    <style>
        body {
            font-family: 'Microsoft YaHei', sans-serif;
            max-width: 800px;
            margin: 0 auto;
            padding: 20px;
            line-height: 1.6;
        }
        
        .demo-box {
            padding: 20px;
            background-color: #f0f8ff;
            border-radius: 5px;
            margin-bottom: 30px;
        }
        
        .border-example {
            border-block-end-width: 8px;
            border-block-end-style: solid;
            border-block-end-color: pink;
            writing-mode: vertical-rl;
            height: 200px;
            padding: 15px;
            background-color: #fff;
        }
        
        h1, h2 {
            color: #333;
        }
        
        .note {
            background-color: #fffaf0;
            padding: 15px;
            border-left: 4px solid #ffa500;
            margin: 20px 0;
        }
    </style>
</head>
<body>
    <h1>border-block-end-color 垂直书写模式演示</h1>
    
    <div class="note">
        <p><strong>说明：</strong> 在垂直书写模式 (writing-mode: vertical-rl) 下，border-block-end-color 对应左侧边框颜色。</p>
    </div>
    
    <div class="demo-box">
        <h2>演示实例</h2>
        <div class="border-example">
            <p>这个元素设置了:</p>
            <ul>
                <li>writing-mode: vertical-rl;</li>
                <li>border-block-end-width: 8px;</li>
                <li>border-block-end-style: solid;</li>
                <li>border-block-end-color: pink;</li>
            </ul>
            <p>在垂直从右到左书写模式下，这相当于在左侧显示8px宽的粉色实线边框。</p>
        </div>
    </div>
    
    <div class="note">
        <p><strong>效果等同：</strong> 在此模式下 border-block-end-color: pink; 等同于 border-left-color: pink;</p>
    </div>
</body>
</html>