<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
/*宽度允许百分比，高度不允许*/
.c1 {
background-color: bisque;
}
.c2{
width: 50%;
height: 100px;
}
/*inline由块级标签变成行内标签*/
.dis-inline{
display: inline;
}
/*block由行内标签变成块级标签*/
.dis-block{
display: block;
}
/*即使行内也是块级标签*/
.dis-inline-block{
display: inline-block;
}
/*内外边距*/
.c3{
/*1像素边框是绿色的*/
border: 1px solid green;
width: 100%;
height: 100px;
}
.c4{
background-color: red;
width: 100%;
height: 48px;
/*外边距 可调整*/
margin-top: 0px;
/*内边距 可调整*/
padding-top: 0px;
}
</style>
</head>
<body>
<div class="c1 c2 dis-inline">块级变行内</div>
<span class="c1 c2 dis-block">行内变块级</span>
<!-- 行内标签必须自己有内容否则无法应用宽，高，内外边距(无法展示)-->
<span style="height: 100px;width: 100px;background-color: yellow">内容</span>
<br>
<span class="dis-inline-block c1 c2">即时行内也是块级</span>
<!-- 内外边距-->
<div class="c3">
<div class="c4"></div>
</div>
</body>
</html>
