<!DOCTYPE html>
<meta charset="utf-8">
<html>
<body>
<div style="padding:0; margin:0;border-style:solid; border-color:red;">
<span style="padding:0; margin:0;border-style:solid; border-color:green;">Hi</span>
<span style="display:inline-block;padding:0; margin:0;border-width:1px; border-style:solid; border-color:blue;">Hello</span>
</div>
</body>
</html>
为什么“Hi”和“Hello”跨度之间有一个空格?