150 lines
3.0 KiB
CSS
150 lines
3.0 KiB
CSS
*{
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/* 初始化 */
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margin: 0;
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padding: 0;
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}
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body{
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/* 100%窗口高度 */
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height: 100vh;
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/* 溢出隐藏 */
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overflow: hidden;
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}
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.container{
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/* 绝对定位 */
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position: absolute;
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top: 0;
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left: 0;
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width: 100%;
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height: 100%;
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background: url("../images/space.jpg") no-repeat;
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/* 把背景图像扩展至足够大，以使背景图像完全覆盖背景区域 */
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background-size: cover;
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/* 定位背景图像为正中间 */
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background-position-x: center;
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/* 执行动画：动画名称 时长 线性的 无限次播放 */
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animation: animateBg 5s linear infinite;
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}
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span{
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position: absolute;
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top: 50%;
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left: 50%;
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width: 4px;
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height: 4px;
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background-color: #fff;
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border-radius: 50%;
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/* 发光效果 */
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box-shadow: 0 0 0 4px rgba(255,255,255,0.1),
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0 0 0 8px rgba(255,255,255,0.1),
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0 0 20px rgba(255,255,255,1);
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/* 执行动画 */
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animation: animate 3s linear infinite;
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}
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/* 拖尾效果 */
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span::before{
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content: "";
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position: absolute;
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top: 50%;
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transform: translateY(-50%);
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width: 300px;
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height: 3px;
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background: linear-gradient(90deg,#fff,transparent);
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}
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/* 接下来分别为每一个流星设置位置、动画延迟时间、动画时长 */
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span:nth-child(1){
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top: 0;
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right: 0;
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/* initial关键字用于设置CSS属性为它的默认值 */
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left: initial;
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/* 动画延迟时间 */
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animation-delay: 0s;
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/* 动画时长 */
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animation-duration: 1s;
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}
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span:nth-child(2){
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top: 0;
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right: 80px;
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left: initial;
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animation-delay: 0.2s;
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animation-duration: 3s;
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}
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span:nth-child(3){
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top: 80px;
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right: 0;
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left: initial;
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animation-delay: 0.4s;
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animation-duration: 2s;
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}
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span:nth-child(4){
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top: 0;
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right: 180px;
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left: initial;
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animation-delay: 0.6s;
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animation-duration: 1.5s;
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}
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span:nth-child(5){
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top: 0;
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right: 400px;
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left: initial;
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animation-delay: 0.8s;
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animation-duration: 2.5s;
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}
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span:nth-child(6){
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top: 0;
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right: 600px;
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left: initial;
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animation-delay: 1s;
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animation-duration: 3s;
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}
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span:nth-child(7){
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top: 300px;
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right: 0;
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left: initial;
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animation-delay: 1.2s;
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animation-duration: 1.75s;
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}
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span:nth-child(8){
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top: 0;
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right: 700px;
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left: initial;
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animation-delay: 1.4s;
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animation-duration: 1.25s;
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}
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span:nth-child(9){
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top: 0;
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right: 1000px;
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left: initial;
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animation-delay: 0.75s;
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animation-duration: 2.25s;
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}
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span:nth-child(10){
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top: 0;
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right: 450px;
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left: initial;
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animation-delay: 2.75s;
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animation-duration: 2.25s;
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}
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/* 定义动画 */
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/* 背景缩放动画 */
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@keyframes animateBg {
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0%,100%{
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transform: scale(1);
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}
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50%{
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transform: scale(1.2);
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}
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}
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/* 流星划过动画 */
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@keyframes animate {
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0%{
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transform: rotate(315deg) translateX(0);
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opacity: 1;
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}
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90%{
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opacity: 1;
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}
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100%{
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transform: rotate(315deg) translateX(-1000px);
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opacity: 0;
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}
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} |