CSS의 초기, 상속, 설정 해제, 되돌리기 키워드 및 모든 속성을 이해합니다.

//display在官方CSS规范中定义的默认值是inline
<style>
.test{display: initial;}
</style>
<div class="box">
    <div class="test">测试一</div><span>文字</span>
    <br>
    <div >测试二</div><span>文字</span>
</div>

<style>
.box{
    border: 1px solid black;
    padding: 10px;
    width: 100px;
}
.test{
    border: inherit;
    height: 30px;
}
</style>
<div class="box">
    <div class="test">测试一</div>
</div>
<div class="box">
    <div class="in">
        <div class="test">测试二</div>        
    </div>
</div>

color
cursor
direction
font
letter-spacing
line-height
list-style
text-align
text-indent
text-shadow
text-transform
white-space
word-break
word-spacing
word-wrap
writing-mode

//内容为测试一的元素和内容为测试二的元素的样式是一样的
<style>
.box{
    border: 1px solid black;
    padding: 10px;
    width: 100px;
    color: red;
}
.test1{
    border: unset;
    color: unset;
}
</style>
<div class="box">
    <div class="test">测试一</div>
    <div>测试二</div>
</div>

<style>
.test{
    border: 1px solid black;
    padding: 20px;
    color: red;
}
.in{
/*  all: initial;
    all: inherit;
    all: unset;
    all: revert; */
}
</style>
<div class="test">
    <div class="in">测试文字</div>            
</div>

border:none;padding:0;color:black;

border:1px solid black;padding:20px;color:red;

border:none;padding:0;color:red;