前端开发初识/6.HTML中怎么写CSS.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <!--嵌入式的写法-->
    <style>
        #demo-ul{
            color: aqua;
        }
        .item-2{
            color: orange;
        }
        .item-9999{
            color: orange;
        }


        .ol-item{
            color: coral;
            border-bottom: 1px solid darkgreen;
        }
        .light-hight{
            color: orange;
        }
        /* id 分 100*/
        #test-demo{  color: rebeccapurple;  }
        /* class 分10  标签是1分*/
        body .test-demo{  color: orange;  }

    </style>
    <!--外链的写法-->
    <!--<style src="./wui/color.css?t=201708261529"></style>-->
    <link rel="stylesheet" href="./wui/color.css?t=201708261529">

</head>
<body>
<!--行内的CSS写法:css直接写在标签上-->
<!--style="color: red"-->
<div style="color: red" class="test-demo" id="test-demo">this is  div <span>span</span></div>
<div >2</div>
<div style="color: red">3</div>
<div style="color: red">4</div>
<div style="color: red">5</div>
<div style="color: red">5</div>

<!--嵌入式的写法-->
<!--比起行内写法，方便维护;减少代码量-->
<h1 class="light-hight">这是高亮的</h1>
<ul id="demo-ul">
    <li>001</li>
    <li class="item-2">002</li>
    <li>003</li>
    <li>004</li>
    <li>004</li>
    <li>004</li>
    <li>004</li>
    <li>004</li>
    <li>004</li>
    <li>004</li>
    <li>004</li>
    <li>004</li>
</ul>
<ol>
    <li class="ol-item">111</li>
    <li class="ol-item">222</li>
    <li class="ol-item">333</li>
    <li class="ol-item">444</li>
</ol>
<p class="warning">你确定提交修改的信息吗？</p>
</body>
</html>