html,
body {
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    font-size: 16px;
    line-height: 1.2;
}

body::-webkit-scrollbar {
    display: none;
}

.main-title {
    display: flex;
    margin: auto;
    -ms-user-select: none; /* IE10+ */
    -moz-user-select: none; /* Firefox */
    -webkit-user-select: none; /* Chrome/Safari */
    user-select: none;
}

.background {
    display:flex;
    height: 100vh;
    font: 900 calc(100vmax/6*1.8) '';
    background-image: url(http://yovey.online/static/pic/Meteor.jpg);
    background-size: cover;
    background-position: 50%, 50%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
    text-align: center;
    overflow: hidden;
}

.background::before {
    content: '';
    background-size: cover;
    background-image: inherit;
    background-position: 50% 50%;
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    z-index: -99;
}

#secondary {
    margin-top: 20px;
    margin-bottom: 10px;
    position: absolute;
    text-align: center;
    width: 100%;
    letter-spacing: 10px;
    color: azure;
    z-index: 99;
    font-family: sans-serif;
    font-weight: 300;
    font-size: 2.0em;
}

.mainbody {
    background-color: #010721;
}

.think {
    letter-spacing: 2px;
    background-color: #010721;
}
.think a{
    color:#2B396E;
}

#pre-content {
    display:block;
    position: relative;
    text-align: center;
    font-size: smaller;
    color: #a3a3a3;
    /* padding-top: 75px; */
    font-size: 1.0em;
}
#main-content {
    position: relative;
    width: 65%;
    left: 50%;
    transform: translateX(-50%);

    padding-top: 40vh;
    padding-bottom: 40vh;
    padding-left: 1vh;
    padding-right: 1vh;

    color: #fff;
    width: 60%;
    text-indent: 2em;
    font-size: 2em;
    font-weight: bold;
}

#end-content{
    display:block;
    position: relative;
    text-align: center;
    font-size: smaller;
    color: #a3a3a3;
    /* padding-top: 75px; */
    font-size: 1.0em;
}
#author{
    color: #a3a3a3;
}
/* 页脚信息 */
.site-footer{
    font-size:0.8rem;
    color: #2B396E;
    background-color: #010721;
    padding-top: 3vh;
}
.site-footer p{
    margin:0px;
}
.site-footer a{
    color:#2B396E;
}

/* 导航栏 */
.title-bar {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #0D1129;
    position: relative;
    bottom: 0;
    width: 100%;
}

.bar-li {
    float: left;
    max-width: 72px;
    white-space: nowrap;
    width: 16vw;
}

.bar-li a {
    font-size:1.1rem;
    display: block;
    color: white;
    text-align: center;
    padding: 14px 0px;
}
.bar-li a:focus,.bar-li a:hover{
    color: white;
    text-decoration: none;
}
.active {
    background-color: #1A3480;
}
.bar-li a:hover:not(.active) {
    background-color: #010721;
}


/* 播放按钮 */
#play-pause-button {
    position: fixed;
    top: 20px;
    right: 20px;
    width:34px;
    height:34px;
    z-index: 9999;
    padding: 10px;
    background-color: transparent;
    color: #ffffff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0px 2px 5px rgba(0, 0, 0, 0.8);
    
}
.icon {
    position:fixed;
    transform:translate(-50%,-50%);
    z-index:1000; 
} 
.icon-svg{
    fill: #ffffff;
}