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效果图

什么也不说了，上代码。

    
    
        .point_area {
            text-align: center;
            position: relative;
            width: 150px;
            height: 150px;
            transition: opacity .5s ease-out;
        }
        .point_area .point {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            width: 10px;
            height: 10px;
            margin: auto;
            -webkit-border-radius: 50%;
            -webkit-background-clip: padding-box;
            -moz-border-radius: 50%;
            -moz-background-clip: padding;
            border-radius: 50%;
            background-clip: padding-box;
            background: transparent;
        }
        .point_area .point_dot {
            z-index: 1;
            background-color: #ff903d;
            border: 1px solid rgba(255,144,61,.37);
        }
        .point_area .point_10 {
            width: 100%;
            height: 100%;
        }
        .point_area .point_10:after {
            content: "";
            display: block;
            position: absolute;
            top: 0;
            right: 0;
            bottom: 0;
            left: 0;
            border-radius: 50%;
            border: 2px solid #ff903d;
            opacity: 0;
            -webkit-animation: ripple 4.5s ease-out 225ms infinite;
            animation: ripple 4.5s ease-out 225ms infinite;
        }
        .point_area .point_40 {
            width: 100%;
            height: 100%;
        }
        .point_area .point_40:after {
            content: "";
            display: block;
            position: absolute;
            top: 0;
            right: 0;
            bottom: 0;
            left: 0;
            border-radius: 50%;
            border: 2px solid #ff903d;
            opacity: 0;
            -webkit-animation: ripple 4.5s ease-out .9s infinite;
            animation: ripple 4.5s ease-out .9s infinite;
        }
        .point_area .point_80 {
            width: 100%;
            height: 100%;
        }
        .point_area .point_80:after {
            content: "";
            display: block;
            position: absolute;
            top: 0;
            right: 0;
            bottom: 0;
            left: 0;
            border-radius: 50%;
            border: 2px solid #ff903d;
            opacity: 0;
            -webkit-animation: ripple 4.5s ease-out 1.8s infinite;
            animation: ripple 4.5s ease-out 1.8s infinite;
        }
        @-webkit-keyframes ripple{
            0%{
                opacity:0;-webkit-transform:scale(.1)
            }
            5%{
                opacity:1
            }
            to{
                opacity:0;
                -webkit-transform:scale(1)
            }
        }
        @keyframes ripple{
            0%{
                opacity:0;
                -webkit-transform:scale(.1);
                transform:scale(.1)
            }
            5%{
                opacity:1
            }
            to{
                opacity:0;
                -webkit-transform:scale(1);
                transform:scale(1)
            }
        }
    


    
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