跳动的心

        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%);
        }

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

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

        .center {
            width: 210px;
            height: 210px;
            bottom: 100px;
            left: 145px;
        }

        .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;
            }
        }

主要是 动画函数中 rotate角度要每次重复