css实现一个弹框的动画（animation）

1.实现效果

2.实现代码

<div class="box" id="box">展示苏苏的二维码</div>
<div class="codeBox" id="code_box">
    <div id="hide">
        <img src="./susu.png" />
    </div>
</div>

body {
    padding: 0;
    margin: 0;
    display: flex;
    height: 100vh;
    justify-content: center;
    align-items: center;
    background-color: #222;
    min-width: 1200px;
}

.box {
    width: 199px;
    text-align: center;
    border: 1px solid #DCDCDC;
    background: no-repeat center center;
    background-color: rgba(204, 217, 220, .1);
    background-size: 45px;
    transition: all .3s;
    cursor: pointer;
    overflow: hidden;
    height: 28px;
    line-height: 28px;
    opacity: .5;
    border-radius: 14px;
    color: #fff;
}

.box:hover {
    border: 1px solid #008000;
    background-color: rgba(177, 211, 220, 0.5);
}

@keyframes show {
    0% {
        transform: rotateX(90deg);
    }

    8% {
        opacity: 1;
        transform: rotateX(-60deg);
    }

    18% {
        opacity: 1;
        transform: rotateX(40deg);
    }

    34% {
        opacity: 1;
        transform: rotateX(-28deg);
    }

    44% {
        opacity: 1;
        transform: rotateX(18deg);
    }

    58% {
        opacity: 1;
        transform: rotateX(-12deg);
    }

    72% {
        opacity: 1;
        transform: rotateX(9deg);
    }

    88% {
        opacity: 1;
        transform: rotateX(-5deg);
    }

    96% {
        opacity: 1;
        transform: rotateX(2deg);
    }

    100% {
        opacity: 1;
    }
}

.codeBox {
    z-index: 1;
    display: none;
    perspective: 400px;
    position: absolute;
    margin: auto;
    width: 200px;
    height: 200px;
}

.codeBox div {
    cursor: pointer;
    background: #fff no-repeat center center;
    background-size: 190px;
    border-radius: 6px;
    box-shadow: 0 2px 7px rgb(0 0 0 / 30%);
    opacity: 0;
    transition: all 1s ease-in-out;
    transform-style: preserve-3d;
    transform-origin: center center;
    overflow: hidden;
    opacity: 1;
    -webkit-animation: show 3s ease-in-out 0s 1 normal forwards;
}

img {
    width: 100%;
    height: 100%;
}

.hide {
    -webkit-animation: hide .5s ease-in-out 0s 1 normal forwards;
}

@keyframes hide {

    20%,
    50% {
        transform: scale(1.08, 1.08);
        opacity: 1;
    }

    100% {
        opacity: 0;
        transform: rotateZ(40deg) scale(0.6);
    }
}

let btn = document.getElementById('box');
let hbtn = document.getElementById('hide');
btn.onclick = function() {
    document.getElementById('code_box').classList.remove('hide');
    document.getElementById('code_box').style.display = "block";
}

hbtn.onclick = function() {
    document.getElementById('code_box').classList.add('hide');
    setTimeout(() => {
        document.getElementById('code_box').style.display = "none";
    }, 500)
}

3.完整代码

苏苏的codepen