*{
    /* 初始化 */
    margin: 0;
    padding: 0;
}

.menu-box{
    /* 固定定位 右下角 */
    position: fixed;
    z-index: 9999;
    bottom: 430px;
    right: 5px;
}
/* 菜单按钮 */
.menu-button{
    width: 30px;
    height: 30px;
    background-color: #101111;
    border-radius: 50%;
    /* 投影 */
    box-shadow: 0 0 0 4px rgba(13, 13, 14, 0.3);
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    z-index: 1;
    cursor: pointer;
    /* 过渡 */
    transition: 0.2s ease-in;
}
.menu-button:hover{
    background-color: #0f0f0f;
    box-shadow: 0 0 0 8px rgba(22, 22, 22, 0.3);
}
.menu-button .line-box{
    width: 20px;
    height: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    cursor: pointer;
    transition: transform 0.3s ease-out;
}
/* 菜单按钮图标（三条杠） */
.menu-button .line{
    background-color: #fff;
    width: 100%;
    height: 2px;
    border-radius: 2px;
}
/* 前后两条短，中间的长 */
.menu-button .line:first-child{
    width: 50%;
    /* 设置变换的基点 */
    transform-origin: right;
    /* 过渡效果 */
    transition: transform 0.3s ease-in-out;
}
.menu-button .line:last-child{
    width: 50%;
    align-self: flex-end;
    transform-origin: left;
    transition: transform 0.3s ease-in-out;
}
/* 菜单列表 */
.menu-list{
    width: 130px;
    height: auto;
    background-color: rgba(24, 23, 23, 0.644);
    border-radius: 8px;
    list-style: none;
    padding: 6px;
    box-shadow: 0 0 4px 4px rgba(17, 17, 17, 0.15);
    position: absolute;
    right: 10px;
    bottom: 15px;
    /* 默认隐藏 */
    opacity: 0;
    transform: scale(0);
    /* 设置变换的基点 */
    transform-origin: bottom right;
    /* 过渡效果 */
    transition: 0.3s ease;
    /* 过渡延迟 */
    transition-delay: 0.1s;
}
/* 菜单项 */
.menu-list li{
    display: flex;
    align-items: center;
    padding: 10px;
    color: #e4e4eb;
    cursor: pointer;
    position: relative;

}


/* 菜单项下边框 */
.menu-list li::before{
    content: "";
    width: calc(100% - 24px);
    height: 1px;
    background-color: rgba(7, 7, 7, 0.1);
    position: absolute;
    bottom: 0;
    left: 12px;
}
/* 最后一项不用下边框 */
.menu-list li:last-child::before{
    display: none;
}
/* 菜单项图标 */
.menu-list .fa{
    font-size: 18px;
    width: 18px;
    height: 18px;
    display: flex;
    justify-content: center;
    align-items: center;
}
/* 菜单项文本 */
.menu-list span{
    font-size: 14px;
    margin-left: 8px;
}
/* 活动态下的部分样式变化 */
/* 三条杠的变化 */
.active .line-box{
    transform: rotate(-45deg);
}
.active .line-box .line:first-child{
    transform: rotate(-90deg) translateX(1px);
}
.active .line-box .line:last-child{
    transform: rotate(-90deg) translateX(-1px);
}
/* 菜单列表的变化 */
.active .menu-list{
    opacity: 1;
    transform: scale(1);
}
.active .menu-list li{
    /* 执行动画：动画名 时长 线性 停留在最后一帧 */
    animation: fade-in-item 0.4s linear forwards;
}
/* 接下来为每一项设置动画延迟时间 */
.active .menu-list li:nth-child(1){
    animation-delay: 0.1s;
}
.active .menu-list li:nth-child(2){
    animation-delay: 0.2s;
}
.active .menu-list li:nth-child(3){
    animation-delay: 0.3s;
}
.active .menu-list li:nth-child(4){
    animation-delay: 0.4s;
}

/* 定义动画 */
@keyframes fade-in-item {
    100%{
        transform: translateX(0);
        opacity: 1;
    }
}