CSS3绘制气泡背景墙

CSS3绘制气泡背景墙

重要知识点：

position: absolute;

bottom: -200px;

绝对定位的bottom发生改变，使得呈现div框向上的效果

display: flex; 弹性布局

justify-content: center; 主轴居中对齐

align-items: center; 交叉轴居中对齐 

animation-duration: 7s;

transition-duration:指定过渡效果的持续时间

时间单位:s 和 ms 1s=1000ms

可以分别指定时间（transition-duration: 100ms,2s;）

animation-delay: 2s; 设置动画的延时

transform: translateY(-400px) rotate(90deg);

translateY设置对象沿Y轴平移，表达式中的translation-value，是对象沿Y轴方向平移的数值，如 100px。

CSS3 2D 转换 - rotate 旋转 指的是 令 标签元素 在 二维坐标系中 , 顺时针 / 逆时针 旋转指定的度数 ;

transform: rotate(90deg);

旋转度数 : 旋转度数的单位是 deg , 表示度 ;

旋转方向 : 度数为整数 为 顺时针旋转 , 度数为负数 为 逆时针旋转 ;

旋转中心 : 默认的旋转中心点为 标签元素的中心点 ;

html:

    <div class="bruce">
        <ul class="bubble-bgwall">
            <li>Love</li>
            <li>Love</li>
            <li>Love</li>
            <li>Love</li>
            <li>Love</li>
            <li>Love</li>
            <li>Love</li>
            <li>Love</li>
            <li>Love</li>
            <li>Love</li>
        </ul>
    </div>

css:

    <style>
        *{
            margin:0;
            padding:0;
        }
        .bruce{
            /* 宽度设置为视口宽度的100% */
            width: 100vw;
            /* 高度设置为视口高度的100% */
            height: 100vh;
            background-image: linear-gradient(270deg,#8146b4,#6990f6);
        }
        .bubble-bgwall{
            overflow: hidden;
            position: relative;
            margin: 0 auto;
            width: 1200px;
            height: 100%;
        }
        .bubble-bgwall li{
            display: flex;
            position: absolute;
            bottom: -200px;
            justify-content: center;
            align-items: center;
            border-radius: 10px;
            width: 50px;
            height: 50px;
            padding:30px;
            background-color: rgba(255,255,255,0.15);
            opacity:0.15;
            color: pink;
            font-size: 30px;
            animation: bubble 15s infinite;
        }
        .bubble-bgwall li:nth-child(1){
            left: 10%;
        }
        .bubble-bgwall li:nth-child(2){
            left: 20%;
            width: 90px;
            height: 90px;
            animation-duration: 7s;
            animation-delay: 2s;
        }
        .bubble-bgwall li:nth-child(3){
            left: 25%;
            animation-delay: 4s;
        }
        .bubble-bgwall li:nth-child(4){
            left: 40%;
            width: 60px;
            height: 60px;
            background-color: rgba(255,255,255,0.3);
            animation-duration: 8s;
        }
        .bubble-bgwall li:nth-child(5){
            left: 70%;
        }
        .bubble-bgwall li:nth-child(6){
            left: 80%;
            width: 120px;
            height: 120px;
            background-color: rgba(255,255,255,0.2);
            animation-delay: 3s;
        }
        .bubble-bgwall li:nth-child(7){
            left: 32%;
            width: 160px;
            height: 160px;
            animation-delay: 2s;
        }
        .bubble-bgwall li:nth-child(8){
            left: 55%;
            width: 40px;
            height: 40px;
            font-size: 12px;
            animation-duration: 15s;
            animation-delay: 4s;
        }
        .bubble-bgwall li:nth-child(9){
            left: 25%;
            width: 40px;
            height: 40px;
            background-color: rgba(255,255,255,0.2);
            font-size: 12px;
            animation-duration: 12s;
            animation-delay: 2s;
        }
        .bubble-bgwall li:nth-child(10){
            left: 85%;
            width: 160px;
            height: 160px;
            animation-delay: 5s;
        }

        @keyframes bubble{
            0%{
                opacity: 0.5;
                transform: translateY(0) rotate(45deg);
            }
            25%{
                opacity: 0.75;
                transform: translateY(-400px) rotate(90deg);
            }
            50%{
                opacity: 1;
                transform: translateY(-600px) rotate(135deg);
            }
            100%{
                opacity: 0;
                transform: translateY(-1000px) rotate(180deg);
            }
        }
    </style>