<!-- 这是第一题 -->
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>选择器</title>
<style>
/* 标签选择器 */
div {
background-color: aqua;
color: chartreuse
}
/* 类选择器 */
.class {
background-color: blanchedalmond;
color: coral
}
/* id选择器 */
#id {
background-color: darkgray;
color: black；
}
</style>
</head>
<body>
<div class="class" id="id">盒子模型</div>
</body>
</html>这是第二题
.box {
/* padding */
padding-top: 20px;
padding-right: 30px;
padding-bottom: 40px;
padding-left: 50px;
/* 简写padding */
padding: 20px 30px 40px 50px;
/* 这是背景颜色 */
background-color: aqua;
/* 上边框 */
border-top-color: red;
border-top-style: double;
border-top-width: 50px;
/* 右边框 */
border-right-color: silver;
border-right-style: dotted;
border-right-width: 80px;
/* 下边框 */
border-bottom-color: tomato;
border-bottom-style: groove;
border-bottom-width: 11px;
/* 左边框 */
border-left-color: yellow;
border-left-style: solid;
border-left-width: 100px;
/* 简写边框 */
border-top: red double 50px;
border-right: silver dotted 80px;
border-bottom: tomato groove 11px;
border-left: yellow solid 100px;
}<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>边距</title> <link rel="stylesheet" href="css.css"> </head> <body> <div class="box"> <h1>这是一个大盒子，演示用的</h1> </div> </body> </html>
