lovecoding
/
W250511


			
				
					
						
						
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							<!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>
        .box1{
            width: 400px;
            height: 400px;
            background-color: red;
            /* border-radius: 200px; */
            /* border-radius: 200px; */
            /* 百分比相较于 父元素宽高 */
            border-radius: 50%; 
        }
        .box2{
            width: 0px;
            height: 0px;
            /* background-color: blue; */
            /* transparent 透明 */
            border-top:50px solid transparent;
            border-right:50px solid transparent;
            border-bottom:50px solid yellow;
            border-left:50px solid transparent;
        }
        .box3{
            width: 200px;
            height: 200px;
            /* rgb(0,0,0) 三个值取值范围0-255 */
            /* background-color: rgb(0,0,0); */
            /* rgba(0,0,0,0) 三个值取值范围0-255  第四个值代表透明度 取值范围0-1 */
            background-color: rgba(0,0,0,0.5);

        }
        .box4{
            width: 200px;
            height: 200px;
            background-color: yellow;
        }
        .box5{
            width: 0;
            border:100px solid black
        }
        .box6{
            width: 200px;
            background-color: blue;
            /* padding:100px 0; */
            padding-top: 200px;
        }
    </style>
</head>
<body>
   <div class="box1"></div> 
   <div class="box2"></div> 
   <div class="box3"></div>
   <div class="box4"></div>
   <div class="box5"></div>
   <div class="box6"></div>
</body>
</html>