three styles css

One. Inline styles
(rarely used)

     <h1>静夜思</h1>
    <p>床前明月光，</p>
    <p style="color: red;">疑是地上霜。</p>
    <p style="color: #0000FF;font-size: 1rem;">举头望明月，</p>
    <p>低头思故乡。</p>

two. Inline style
(commonly used in small and medium sized page)

  <head>
    <meta charset="utf-8">
    <title>
    </title>
    <style type="text/css">
        h1{color: red;}
        #aa{color: #0000FF;}
        .bb{color: #00FF00;}
    </style>
</head>
<body>
    <h1>静夜思</h1>
    <p id="aa">床前明月光，</p>
    <p class="bb">疑是地上霜。</p>
    <p>举头望明月，</p>
    <p>低头思故乡。</p>
</body>

three. External links
(commonly used in large Web pages)
the new .css file, the file does not need to write in css <style>
connection. 1 <Link the rel = "this stylesheet" type = "text / css" the href = " .css" />
Connection 2 <style type = "text / CSS"> @ Import URL ( " .css"); </ style>

Stylesheet:

    .red{color: red;}
  #green{color: green;}

Connection 1

<head>
    <meta charset="utf-8">
    <title></title>
    <link rel="stylesheet" type="text/css" href="css/样式表.css"/>
</head>
<body>
    <h1>静夜思</h1>
    <p class="red">床前明月光，</p>
    <p>疑是地上霜。</p>
    <p id="green">举头望明月，</p>
    <p>低头思故乡。</p>
</body>

Connection 2

<head>
    <meta charset="utf-8">
    <title></title>
    <style type="text/css">
          @import url("样式表.css");
    </style>
</head>
<body>
    <h1>静夜思</h1>
    <p class="red">床前明月光，</p>
    <p>疑是地上霜。</p>
    <p id="green">举头望明月，</p>
    <p>低头思故乡。</p>
</body>

Guess you like