CSS的三大特性
1、层叠性
2、继承性
3、优先级
复合选择器还有权重叠加的情况
权重会有叠加,但是永远不会进位
圆角边框
1、圆角边框(border-radius)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
div {
width: 300px;
height: 150px;
background-color: aqua;
border-radius: 10px;
}
</style>
</head>
<body>
<div></div>
</body>
</html>
圆形盒子:
border-radius:正方形盒子边长的一半
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
div {
width: 300px;
height: 300px;
background-color: aqua;
border-radius: 50%;
}
</style>
</head>
<body>
<div></div>
</body>
</html>
圆角矩形:
border-radius:矩形高的一半
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
div {
width: 300px;
height: 150px;
background-color: aqua;
border-radius: 75px;
}
</style>
</head>
<body>
<div></div>
</body>
</html>
阴影
1、盒子阴影(box-shadow)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
div {
width: 300px;
height: 300px;
background-color: pink;
margin: 100px auto;
}
div:hover {
box-shadow: 10px 10px 10px 10px rgba(12, 4, 4, 0.39);
}
</style>
</head>
<body>
<div></div>
</body>
</html>
2、文字阴影(text-shadow)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
p {
color: pink;
font-size: 30px;
text-shadow: 10px 10px 10px rgba(12, 4, 4, 0.39);
}
</style>
</head>
<body>
<p>迪幻迪幻迪幻迪幻</p>
</body>
</html>