网页css样式代码,求css整站渐显代码样式

网页css样式代码,求css整站渐显代码样式详细介绍

#loading {
position: fixed;
top: 0;
left: 0;
width: 100%;
height: 100%;
background-color: #fff;
z-index: 9999;
display: block;
}
body * {
opacity: 0;
transition: opacity 0.3s ease-in-out;
}
body.loaded * {
opacity: 1;
}