css 心形动画爱心动画

1、PC 爱心动画（预览地址：http://www.yueqingfang.cn/heart/pc.html）

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Red Heart</title>
    <style>
        html, body {
            height: 100%;
        }

        body {
            margin: 0;
            padding: 0;
            background: #ffa5a5;
            background: linear-gradient(to bottom, #ffa5a5 0%,#ffd3d3 100%);
        }

        .chest {
            width: 500px;
            height: 500px;
            margin: 0 auto;
            position: relative;
        }

        .heart {
            position: absolute;
            z-index: 2;
            background: linear-gradient(-90deg, #F50A45 0%, #d5093c 40%);
            animation: beat 0.7s ease 0s infinite normal;
        }

        .heart.center {
            background: linear-gradient(-45deg, #B80734 0%, #d5093c 40%);
                transform: scale(1) rotate(225deg);
        }

        .heart.top {
            z-index: 3;
        }

        .side {
            top: 100px;
            width: 220px;
            height: 220px;
            border-radius: 220px;
        }

        .center {
            width: 210px;
            height: 210px;
            bottom: 100px;
            left: 145px;
            font-size: 0;
            text-indent: -9999px;
        }

        .left {
            left: 62px;
        }

        .right {
            right: 62px;
        }


        @keyframes beat {
            0% {
                transform: scale(1) rotate(225deg);
                box-shadow:0 0 40px #d5093c;
            }

            50% {
                transform: scale(1.1) rotate(225deg);
                box-shadow:0 0 70px #d5093c;
            }

            100% {
                transform: scale(1) rotate(225deg);
                box-shadow:0 0 40px #d5093c;
            }
        }
    </style>
</head>
<body>
    <div class="chest">
        <div class="heart left side top"></div>
        <div class="heart center">&hearts;</div>
        <div class="heart right side"></div>
    </div>
</body>
</html>

2、H5 爱心动画（预览地址：http://www.yueqingfang.cn/heart/h5.html）

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="initial-scale=1, width=device-width,initial-scale=1.0, minimum-scale=1.0, maximum-scale=1, user-scalable=no"
          media="(device-height: 568px)">
    <title>充满爱的世界</title>
    <script>
        ;(function (doc, win) {
            var docEl = doc.documentElement,
                resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize',
                recalc = function () {
                    var clientWidth = docEl.clientWidth;
                    if (typeof(clientWidth) == 'number' && clientWidth <= 750) {  //手机端自适应,   基础20
                        docEl.style.fontSize = 20 * (clientWidth / 375) + 'px';
                    } else if (typeof(clientWidth) == 'number' && clientWidth > 750) {   //pc端基础为40/2  20 手机端的适配
                        docEl.style.fontSize = '40' + 'px';
                    }
                };
            if (!doc.addEventListener) return;
            win.addEventListener(resizeEvt, recalc, false);
            doc.addEventListener('DOMContentLoaded', recalc, false);
            recalc();
        })(document, window);
    </script>
    <style>
        html {
            background: linear-gradient(to right, #ffa5a5, #fcdbdb) no-repeat;
            min-height: 100%;
        }

        body {
            max-width: 750px;
            height: 100px;
            margin: 0 auto;
            padding-top: 6rem;
            height: 100%;
        }

        .heart {
            position: relative;
            width: 5rem;
            height: 5rem;
            margin: 0 auto 3.5rem;
            transform: rotate(135deg);
            background: linear-gradient(-0deg, #B80734 0%, #d5093c 40%);
            font-size: 0;
            box-shadow: 0 0 40px #d5093c;
            animation: beat 0.7s ease 0s infinite normal;
        }

        .heart:before {
            content: "";
            position: absolute;
            width: 5rem;
            height: 5rem;
            right: 0rem;
            bottom: -2.5rem;
            background: linear-gradient(0deg, #F50A45 0%, #d5093c 40%);
            border-radius: 50%;
            z-index: 5;
            animation: beat-other 0.7s ease 0s infinite normal;
        }

        .heart:after {
            content: "";
            position: absolute;
            width: 5rem;
            height: 5rem;
            left: -2.5rem;
            top: 0;
            background: linear-gradient(0deg, #F50A45 0%, #d5093c 40%);
            border-radius: 50%;
            animation: beat-other 0.7s ease 0s infinite normal;
        }

        @keyframes beat-other {
            0% {
                box-shadow: 0 0 40px #d5093c;
            }
            50% {
                box-shadow: 0 0 70px #d5093c;
            }
            100% {
                box-shadow: 0 0 40px #d5093c;
            }
        }

        @keyframes beat {
            0% {
                transform: scale(1) rotate(135deg);
                box-shadow: 0 0 40px #d5093c;
            }
            50% {
                transform: scale(1.1) rotate(135deg);
                box-shadow: 0 0 70px #d5093c;
            }
            100% {
                transform: scale(1) rotate(135deg);
                box-shadow: 0 0 40px #d5093c;
            }
        }
    </style>
    <style>
        .heart-title {
            padding: 0 0.2rem 0;
            text-align: center;
            font-size: 1rem;
            line-height: 1.8rem;
        }
    </style>
</head>
<body>
<div class="heart">
    &hearts;
</div>
</body>
</html>

3、其他预览扩展

http://www.yueqingfang.cn/heart/heart.html

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convert_cyr_string — 将字符由一种 Cyrillic 字符转换成另一种
 chunk_split — 将字符串分割成小块
 addslashes — 使用反斜线引用字符串
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 extract — 从数组中将变量导入到当前的符号表
原文地址：https://www.cnblogs.com/huoan/p/10684891.html

css 心形动画 爱心动画

css 心形动画爱心动画