body {
    /*background: url(../img/background.png);*/
    /*background: url(../img/background.jpg);*/
    background: #0E0404;
    background-size: cover;
    margin: 0;
    /*background-attachment: fixed;*/
}

#stars {
    margin: 0 auto;
    max-width: 1600px;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
}

.star {
    display: block;
    width: 1px;
    background: transparent;
    position: relative;
    opacity: 0;
    /*过渡动画*/
    animation: star-fall 3s linear infinite;
    -webkit-animation: star-fall 3s linear infinite;
    -moz-animation: star-fall 3s linear infinite;
}

.star:after {
    content: '';
    display: block;
    border: 0 solid #FFFFFF;
    border-width: 0 90px 2px 90px;
    border-color: transparent transparent transparent rgba(255, 255, 255, 0.5);
    box-shadow: 0 0 1px 0 rgba(255, 255, 255, .1);
    /*变形*/
    transform: rotate(-45deg) translate3d(1px, 3px, 0);
    -webkit-transform: rotate(-45deg) translate3d(1px, 3px, 0);
    -moz-transform: rotate(-45deg) translate3d(1px, 3px, 0);
    transform-origin: 0 100%;
    -webkit-transform-origin: 0 100%;
    -moz-transform-origin: 0 100%;
}

@keyframes star-fall {
    0% {
        opacity: 0;
        transform: scale(0.5) translate3d(0, 0, 0);
        -webkit-transform: scale(0.5) translate3d(0, 0, 0);
        -moz-transform: scale(0.5) translate3d(0, 0, 0);
    }
    50% {
        opacity: 1;
        transform: translate3d(-200px, 200px, 0);
        -webkit-transform: translate3d(-200px, 200px, 0);
        -moz-transform: translate3d(-200px, 200px, 0);
    }
    100% {
        opacity: 0;
        transform: scale(1.2) translate3d(-300px, 300px, 0);
        -webkit-transform: scale(1.2) translate3d(-300px, 300px, 0);
        -moz-transform: scale(1.2) translate3d(-300px, 300px, 0);
    }
}

#content {
    color: #FFFFFF;
    text-shadow: 2px 2px 1px #000000, 4px 4px 2px rgb(20, 60, 109);
    font-family: "华文楷体", "隶书", "楷体", "宋体", "黑体", serif, cursive;
    font-weight: 600;
    font-size: 2.5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

#copyright {
    width: 100%;
    text-align: center;
    position: fixed;
    bottom: 2rem;
    font-size: 1rem;
    flex-wrap: wrap;
}

#copyright a {
    color: #FFFFFF;
    text-decoration: none;
    text-shadow: 2px 2px 1px #000000, 4px 4px 2px rgb(20, 60, 109);
}

#copyright a:hover {
    text-decoration: underline;
    text-shadow: none;
}

#my-logo {
    position: fixed;
    top: 2rem;
    left: 2rem;
    width: 5rem;
    justify-content: center;
    align-items: center;
    box-shadow: 2px 2px 15px #FFFFFF;
    border-radius: 1.5rem;
    cursor: pointer;
    transition: all 1s;
}

#my-logo:hover {
    transform: rotate(720deg);
    width: 10rem;
    border-radius: 3rem;
    box-shadow: 3px 3px 20px #FFFFFF;
}

#friendship-link {
    background: none;
    padding: 2px;
    color: #FFFFFF;
    font-size: 1rem;
    cursor: pointer;
    text-shadow: 2px 2px 1px #000000, 4px 4px 2px rgb(20, 60, 109);
    border: 1px solid #FFFFFF;
    border-radius: 3px;
    box-shadow: 2px 2px 2px #000000, 3px 3px 1px rgb(20, 60, 109);
}

#friendship-link option {
    background: rgb(9, 14, 33);
    font-size: 0.8rem;
    cursor: pointer;
}

#navigation {
    width: 100%;
    position: fixed;
    top: 1rem;
    color: #FFFFFF;
    text-shadow: 2px 2px 1px #000000, 4px 4px 2px rgb(20, 60, 109);
    font-size: 1rem;
    font-weight: 500;
}

#navigation ul {
    float: right;
    margin-right: 5rem;
}

#navigation li {
    list-style-type: none;
    float: left;
    cursor: pointer;
    margin-right: 2rem;
    letter-spacing: 0.3rem;
}

#navigation li:hover {
    color: #FAC586FF;
    font-weight: 800;
}

#my-box {
    width: 82%;
    border: 1px solid #FFFFFF;
    position: fixed;
    left: 50%;
    transform: translateX(-50%);
    top: 6rem;
    background: #FFFFFF;
    height: 100vh;
    z-index: 99;
    border-radius: 5px;
    display: none;
}

#my-box-loading {
    width: 15.3rem;
    position: fixed;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

#my-box-close {
    width: 2.2rem;
    height: 2.2rem;
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    cursor: pointer;
}

#my-box-content {
    width: 100%;
    height: 100vh;
    margin: 3.2rem auto 0 auto;
}

#my-box-title {
    width: 100%;
    position: absolute;
    top: 0;
    height: 3.2rem;
    line-height: 3.2rem;
    text-align: center;
    background: #FAC586FF;
    margin: 0;
    letter-spacing: 0.3rem;
    color: #FFFFFF;
    text-shadow: 2px 2px 1px #000000, 4px 4px 2px rgb(20, 60, 109);
    font-size: 2rem;
    font-weight: 600;
    font-family: "华文楷体", "隶书", "楷体", "宋体", "黑体", serif, cursive;
    border-radius: 5px 5px 0 0;
}