jquery实现很炫很酷的弹出层效果

<div id="popup" class="popup">
    <div class="popup-content">
        <span class="close-btn">&times;</span>
        <p>这是一个弹出层！</p>
    </div>
</div>
<button id="openPopup">打开弹出层</button>

.popup {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    justify-content: center;
    align-items: center;
}

.popup-content {
    background-color: white;
    padding: 20px;
    border-radius: 5px;
    position: relative;
}

.close-btn {
    position: absolute;
    top: 0;
    right: 10px;
    font-size: 20px;
    cursor: pointer;
}

$(document).ready(function() {
    // 打开弹出层
    $('#openPopup').click(function() {
        $('#popup').fadeIn(300); // 淡入效果
    });

    // 关闭弹出层
    $('.close-btn').click(function() {
        $('#popup').fadeOut(300); // 淡出效果
    });

    // 点击弹出层外部区域关闭
    $(window).click(function(event) {
        if (event.target == document.getElementById('popup')) {
            $('#popup').fadeOut(300);
        }
    });
});