.slide_menu {
    position: relative;
    width: 100%; height: 100%;
    background-color: rgba(0,0,0,0.7);
    pointer-events: all;
    user-select: none;
    -webkit-user-select: none;
    overflow: hidden;
}

.slide_menu .stage {
    position: absolute;
    top: 0;
    width: 100%; height: 100%;
    display: inline-block;
    transition: left 0.5s;
    overflow: hidden;
}

.slide_menu .stage > div:first-child {
    position: relative;
    width: 100%; height: 100%;
    overflow-x: hidden;
    overflow-y: auto;
}

.slide_menu .stage > div:first-child .item {
    position: relative;
    box-sizing: border-box;
    width: 100%; 
}

.slide_menu .stage > div:first-child .item .title {
    position: relative;
    box-sizing: border-box;
    width: 100%; 
    cursor: pointer;
    transition: background-color 0.3s, color 0.3s;
}

.slide_menu .stage > div:first-child > .item > .title {
    padding: 10px 0 10px 10px;
    background-color: rgba(0,0,50,0.5);
    font-family: Arial, Helvetica, sans-serif;
    font-size: 16px;
    color: #fff;
}

.slide_menu .stage > div:first-child > .item > .title:hover {
    background-color: rgba(0,0,50,0.9);
    color: red;
}

.slide_menu .stage > div:first-child > .item.active > .title {
    background-color: rgba(50,0,0,0.5);
    color: orange;
}

.slide_menu .stage > div:first-child > .item.active > .title:hover {
    background-color: rgba(50,0,0,0.9);
    color: orange;
}

.slide_menu .stage > div:first-child > .item.group > .title {
    padding: 10px 0 10px 10px;
    background-color: rgba(50,50,50,0.5);
    font-family: Arial, Helvetica, sans-serif;
    font-size: 16px;
    font-weight: bold;
    color: #fff;
}

.slide_menu .stage > div:first-child > .item.group > .title:hover {
    background-color: rgba(50,50,50,0.9);
    color: red;
}

.slide_menu .stage > div:first-child > .item.group.active > .title {
    background-color: rgba(50,0,0,0.5);
    color: orange;
}

.slide_menu .stage > div:first-child > .item.group.active > .title:hover {
    background-color: rgba(50,0,0,0.9);
    color: orange;
}

.slide_menu .stage > div:first-child > .item.group > .title:after {
    content: '⟩';
    position: absolute;
    right: 24px; top: 50%; 
    font-family: Arial, Helvetica, sans-serif;
    font-size: 24px; color: #fff;
    font-weight: normal;
    font-style: normal;
    text-decoration: none;
    transform-origin: center;
    transform: translateY(-50%) rotate(0deg) scaleY(0.7);
    z-index: 2;
    transition: transform 0.3s;
}

.slide_menu .stage > div:first-child > .item.back > .title {
    /* background-color: rgba(50,0,0,0.5); */
    padding-left: 36px;
    color: orange;
}

.slide_menu .stage > div:first-child > .item.back > .title:hover {
    background-color: rgba(50,0,0,0.9);
    color: orange;
}

.slide_menu .stage > div:first-child > .item.back > .title:after {
    content: '⟩';
    position: absolute;
    left: 14px; top: 50%; 
    font-family: Arial, Helvetica, sans-serif;
    font-size: 24px; color: #fff;
    font-weight: normal;
    font-style: normal;
    text-decoration: none;
    transform-origin: center;
    transform: translateY(-50%) rotate(180deg) scaleY(0.7);
    z-index: 2;
    transition: transform 0.3s;
}