.yyui-intro-body>div{
    display: none;
}
.yyui-intro-body>div.yyui-intro-box{
    display: block;
}
.yyui-intro-box{
    display: none;
    z-index: 9999;
    overflow: hidden;
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 100%;
    background: rgba(10,10,10,0.85);
}
.yyui-intro-image{
    position: relative;
    margin: 0 auto;
    width: 100%;
    height: 100%;
}
.yyui-intro-toolbar{
    position: absolute;
    display: block;
    text-align: center;
    bottom: 10%;
    width: 100%;
}
.yyui-intro-button{
    border: 1px solid white;
    border-radius: 6px;
    color: #fff;
    font-size: 16px;
    padding: 8px 12px;
    cursor: pointer;
}