CSS之页面元素飞入效果

效果预览：

- https://www.runoob.com/try/try.php?filename=trycss3_animation-fill-mode

- https://www.runoob.com/cssref/css3-pr-animation-fill-mode.html

.animated {
    -webkit-animation-duration: 1.5s;
    animation-duration: 1.5s;
    -webkit-animation-fill-mode: both;
    animation-fill-mode: both;
}