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CSS3 border凹陷该如何编写?

本人新手,请问各位大神,如此,该如何编写CSS3 ? (我说的是蓝色的部分) 谢谢了~~

黄舟黄舟2778 Tage vor968

Antworte allen(4)Ich werde antworten

  • ringa_lee

    ringa_lee2017-04-17 11:15:22

    我的思路:绝对定位+after/before伪类实现,大致实现的效果如下:

    TZ可以参见给的demo自行修改一下:在线demo

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  • 天蓬老师

    天蓬老师2017-04-17 11:15:22

    如果换个思路的话,可以把那个圆的margin设置成背景色,然后盖住右侧,这样看上去就像是凹进去的效果了。

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  • 怪我咯

    怪我咯2017-04-17 11:15:22

    首先更正一下一楼的答案,after/before是伪元素而不是伪类,这个很重要,不能把这个弄混淆了,如果是我我会用一个大圆覆盖长条,再用小圆覆盖大圆就好了

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  • 巴扎黑

    巴扎黑2017-04-17 11:15:22

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
    <head>
        <meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
        <title>css</title>
    </head>
    <body>
    <style>
    #a {
        width: 150px;
        height: 300px;
        background: radial-gradient(circle at top left,
        transparent 15px, #e6e4b7 0) top left,
        radial-gradient(circle at top right,
                transparent 15px, #e6e4b7 0) top right,
        radial-gradient(circle at bottom right,
                transparent 15px, #e6e4b7 0) bottom right,
        radial-gradient(circle at bottom left,
                transparent 15px, #e6e4b7 0) bottom left;
        background-size: 50% 50%;
        background-repeat: no-repeat;
        padding: 20px 24px 22px 20px;
    }
    #b {
        display: block;
        background: radial-gradient(circle at top left,
        transparent 15px, red 0) top left,
        radial-gradient(circle at top right,
                transparent 15px, red 0) top right,
        radial-gradient(circle at bottom right,
                transparent 15px, red 0) bottom right,
        radial-gradient(circle at bottom left,
                transparent 15px, red 0) bottom left;
        background-size: 50% 50%;
        background-repeat: no-repeat;
        width:100%;
        height: 100%;
        padding: 2px;
    }
    #b:before {
        content: "";
        width: 100%;
        height: 100%;
        display: block;
        background: radial-gradient(circle at top left,
        transparent 15px, #e6e4b7 0) top left,
        radial-gradient(circle at top right,
                transparent 15px, #e6e4b7 0) top right,
        radial-gradient(circle at bottom right,
                transparent 15px, #e6e4b7 0) bottom right,
        radial-gradient(circle at bottom left,
                transparent 15px, #e6e4b7 0) bottom left;
        background-size: 50% 50%;
        background-repeat: no-repeat;
    }
    </style>
    
        <p id="a">
            <p id="b"></p>
        </p>
    </body>
    </html>

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