*{
    margin:0;
    padding:0;
}
body{
    width:100%;
    font-family: Arial, Helvetica, sans-serif;
    position: relative;
    background-color: #000000;
}
.window{
    width:100%;
    height: 100vh;
    overflow: hidden;
    position: relative;
}
.window>img{
    width:100vw;
    height: 100vh;
    position :absolute;
    transform: scale(1,6);
    animation: window_img 1s ease-out forwards;
}
.table{
    width:100%;
    height:20vh;
    position: relative;
}
.bg{
    position: relative;
    width:100%;
    height:100vh;
    user-select: none;
}
.bg h1{
    position: absolute;
    top: 60%;
    left: 50%;
    transform: translate(-50%);
    color: #fff;
    letter-spacing: 10px;
    font-weight: 100;
    font-size: 100px;
    z-index: 1;
    opacity: 0;
    animation : bg_h1 0.5s ease-out forwards;
}
.bg p{
    position: absolute;
    top: 70%;
    left: 50%;
    transform: translate(-50%);
    color: #fff;
    letter-spacing: 10px;
    font-weight: 100;
    font-size: 20px;
    z-index: 1;
    opacity: 0;
    animation : bg_p 0.5s ease-out forwards 0.3s;
}
.bg h5{
    position: absolute;
    top: 1%;
    left: 50%;
    transform: translate(-50%);
    color: #fff;
    letter-spacing: 10px;
    font-weight: 100;
    font-size: 10px;
    z-index: 1;
    opacity: 0;
    animation : bg_h5 0.3s ease-out forwards 0.6s;
}
.bg h6{
    position: absolute;
    top: 80%;
    left: 50%;
    transform: translate(-50%);
    color: #fff;
    letter-spacing: 5px;
    font-weight: 100;
    font-size: 10px;
    z-index: 1;
    opacity: 0;
    animation : bg_h6 0.3s ease-out forwards 0.6s;
}
.bg i:nth-child(4){
    z-index: 1;
    color: #fff;
    position: absolute;
    bottom: 2vh;
    left: 50%;
    transform: translateX(-50%);
    animation: bg_i 1s infinite;
}
.bg i:nth-child(5){
    z-index: 1;
    color: #fff;
    position: absolute;
    bottom: 0vh;
    left: 50%;
    transform: translateX(-50%);
    animation: bg_i 1s 0.5s infinite;
}

/* 动画，神仙巨佬硬写，太强了 */
@keyframes bg_h1{
    from{
        top: 70;
        opacity: 0;
    }
    to{
        top: 30%;
        opacity: 1;
    }
}
@keyframes bg_p{
    from{
        top: 80;
        opacity: 0;
    }
    to{
        top: 50%;
        opacity: 1;
    }
}
@keyframes bg_h5{
    from{
        opacity: 0;
    }
    to{
        opacity: 1;
    }
}
@keyframes bg_h6{
    from{
        top: 100%;
        opacity: 0;
    }
    to{
        top: 80%;
        opacity: 1;
    }
}
@keyframes window_img{
    from{
        transform: scale(1.6);
    }
    to{
        transform: scale(1);
    }
}
@keyframes bg_i{
    0%{
        opacity: 1;
    }
    50%{
        opacity: 0;
    }
    100%{
        opacity: 1;
    }
}
/* 下半部分 */
.up i:nth-child(1){
    z-index: 1;
    color: #fff;
    position: absolute;
    top: 100vh;
    left: 50%;
    transform: translateX(-50%);
    animation: bg_i 1s infinite;
}
.up i:nth-child(2){
    z-index: 1;
    color: #fff;
    position: absolute;
    top: 102vh;
    left: 50%;
    transform: translateX(-50%);
    animation: bg_i 1s 0.5s infinite;
}
.container{
    position: relative;
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content:  center;
    align-items: center;
    flex-wrap: wrap;
    color: #fff;
}
.container .con{
    background-color: rgba(255,255,255,0.1);
    border-radius: 20px;
    backdrop-filter: blur(15px);

    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    grid-gap: 20px;
    padding: 20px;
}
.container .box{
    display: flex;
    justify-content: space-between;
    flex-direction: column;
    align-items:  center;
    padding: 10px;
    border: 1px solid rgba(255,255,255,0);
    transition: border 0.5s;
}
.container .box:hover{
    border: 1px solid rgba(255,255,255,1);
    transition: border 0.5s;
}
.container .content{
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
}
.container a img{
    width: 80px;
}