body {
    background:url(https://images.cnblogs.com/cnblogs_com/zltttt/1172989/o_luogu_blog.png);
    background-attachment: fixed;
    background-repeat: no;
    background-position: top;
    background-size: 100%;
}


#home {
    opacity: 0.80;
    margin: 0 auto;
    width: 70%;
    min-width: 950px;
    padding: 30px;
    margin-top: 30px;
    margin-bottom: 50px;
    box-shadow: 0 2px 6px rgba(100, 100, 100, 0.3);
}

#Uleft, #Uright, #Dleft, #Dright {
    -moz-transition-property: top;
    -moz-transition-duration: 1s;
    -webkit-transition-property: top;
    -webkit-transition-duration: 1s;
    -o-transition-property: top;
    -o-transition-duration: 1s;
    position: fixed;
    width: 80px;
    height: 80px;
    line-height: 500px;
    text-align: center;
    z-index: 2;
}

#Dright {
    bottom: -50px;
    right: 0px;
    width: 200px;
    height: 250px;
}


#MagicArray {
    opacity: 0.80;
    -moz-transition-property: width height bottom right;
    -moz-transition-duration: 0.5s;
    -webkit-transition-property: width height bottom right;
    -webkit-transition-duration: 0.5s;
    -o-transition-property: width height bottom right;
    -o-transition-duration: 0.5s;
    position: fixed;
    bottom: 120px;
    right: 120px;
    width: 0px;
    height: 0px;
    text-align: center;
    z-index: 1;
}

#Tab1 {
    opacity: 0.80;
    -moz-transition-property: fontSize width height;
    -moz-transition-delay: 0.4s;
    -webkit-transition-property: fontSize width height;
    -webkit-transition-delay: 0.4s;
    -o-transition-property: fontSize width height;
    -o-transition-delay: 0.4s;
    color: #98FB98;
    position: fixed;
    font-size: 0px;
    text-align: center;
    z-index: 3;
    font-weight: 500;
    text-shadow: -1px 0 #7FFFD4, 0 1px #7FFFD4, 1px 0 #7FFFD4, 0 -1px #7FFFD4;
}