body {
    width: 100vw;
    margin: 0;
    display: flex;
    justify-content: center;
}

.content {
    width: 750px;
    background-image: url('../pic/bg1.png');
    background-repeat: no-repeat;
    background-size: 100% 100%;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    flex-direction: column;
    align-items: center;
}

.down {
    cursor: pointer;
}
.main {
    background-image: url('../pic/22.png');
    background-repeat: no-repeat;
    background-size: contain;
    width: 310px;
    height: 130px;
    text-align: center;
    -webkit-animation: heartbeat 1.5s ease-in-out infinite both;
    animation: heartbeat 1.5s ease-in-out infinite both;
}


.bottom {
    margin: 32px 0;
}

@-webkit-keyframes heartbeat {
    from {
        -webkit-transform: scale(1);
        transform: scale(1);
        -webkit-transform-origin: center center;
        transform-origin: center center;
        -webkit-animation-timing-function: ease-out;
        animation-timing-function: ease-out;
    }

    10% {
        -webkit-transform: scale(0.91);
        transform: scale(0.91);
        -webkit-animation-timing-function: ease-in;
        animation-timing-function: ease-in;
    }

    17% {
        -webkit-transform: scale(0.98);
        transform: scale(0.98);
        -webkit-animation-timing-function: ease-out;
        animation-timing-function: ease-out;
    }

    33% {
        -webkit-transform: scale(0.87);
        transform: scale(0.87);
        -webkit-animation-timing-function: ease-in;
        animation-timing-function: ease-in;
    }

    45% {
        -webkit-transform: scale(1);
        transform: scale(1);
        -webkit-animation-timing-function: ease-out;
        animation-timing-function: ease-out;
    }
}

@keyframes heartbeat {
    from {
        -webkit-transform: scale(1);
        transform: scale(1);
        -webkit-transform-origin: center center;
        transform-origin: center center;
        -webkit-animation-timing-function: ease-out;
        animation-timing-function: ease-out;
    }

    10% {
        -webkit-transform: scale(0.91);
        transform: scale(0.91);
        -webkit-animation-timing-function: ease-in;
        animation-timing-function: ease-in;
    }

    17% {
        -webkit-transform: scale(0.98);
        transform: scale(0.98);
        -webkit-animation-timing-function: ease-out;
        animation-timing-function: ease-out;
    }

    33% {
        -webkit-transform: scale(0.87);
        transform: scale(0.87);
        -webkit-animation-timing-function: ease-in;
        animation-timing-function: ease-in;
    }

    45% {
        -webkit-transform: scale(1);
        transform: scale(1);
        -webkit-animation-timing-function: ease-out;
        animation-timing-function: ease-out;
    }
}

@-webkit-keyframes vibrate {
    0% {
        -webkit-transform: translate(0);
        transform: translate(0);
    }

    20% {
        -webkit-transform: translate(-2px, 2px);
        transform: translate(-2px, 2px);
    }

    40% {
        -webkit-transform: translate(-2px, -2px);
        transform: translate(-2px, -2px);
    }

    60% {
        -webkit-transform: translate(2px, 2px);
        transform: translate(2px, 2px);
    }

    80% {
        -webkit-transform: translate(2px, -2px);
        transform: translate(2px, -2px);
    }

    100% {
        -webkit-transform: translate(0);
        transform: translate(0);
    }
}

@keyframes vibrate {
    0% {
        -webkit-transform: translate(0);
        transform: translate(0);
    }

    20% {
        -webkit-transform: translate(-2px, 2px);
        transform: translate(-2px, 2px);
    }

    40% {
        -webkit-transform: translate(-2px, -2px);
        transform: translate(-2px, -2px);
    }

    60% {
        -webkit-transform: translate(2px, 2px);
        transform: translate(2px, 2px);
    }

    80% {
        -webkit-transform: translate(2px, -2px);
        transform: translate(2px, -2px);
    }

    100% {
        -webkit-transform: translate(0);
        transform: translate(0);
    }
}