.menu-index {
display: block;
position: fixed;
overflow: hidden;
width: 100%;
height: 100%;
}
.menu-index-wrapper {
display: block;
position: static;
width: 1600px;
overflow: visible;
transition: all;
}
.menu-index-background {
display: none;
transform: none;
transition: all;
}
.menu-index-nav {
display: block;
transform: none;
transition: all;
}