html, body {
    height: 100%;
}

body {
    color: #fff;
    overflow: hidden;
    background-size: cover;
}
.bg-1{
    background-image: url('../img/bg@01.jpg');
}
.bg-2{
    background-image: url('../img/bg@02.jpg');
}
.bg-3{
    background-image: url('../img/bg@03.jpg');
}
.bg-4{
    background-image: url('../img/bg@04.jpg');
}

.index {
    position: absolute;
    width: 100%;
    top: 50%;
    margin-top: -142px;
}

.index h1 {
    font-size: 50px;
    text-shadow: 2px 8px 2px #000;
    text-align: center;
}

.index .btn {
    display: block;
    color: #fff;
    font-size: 20px;
    background: none;
    border: 1 solid #999;
    border-radius: 6px;
    width: 140px;
    margin: 0 auto 14px auto;
}

.panel {
    width: 80%;
    background: #070808;
    padding: 14px;
    border: 2px solid #fff;
    border-radius: 8px;
    text-align: center;
    box-sizing: border-box;
    position: absolute;
    left: 10%;
    top: 50%;
    margin-top: -109px;
}

.panel button {
    color: #fff;
    border: 1 solid #fff;
    background: none;
    font-size: 18px;
}

.setting-group {
    list-style: none;
    padding: 0;
}

.setting-group .setting {
    margin-bottom: 10px;
}

.setting-group select {
    width: 100px;
    padding-left: 5px;
    background: #fff;
    margin-left: 10px;
    border-radius: 0;
    appearance: none;
    -moz-appearance: none;
    -webkit-appearance: none;
}

/*默认隐藏*/
.index, .rule, .setting, .score {
    display: none;
}

/*游戏状态切换场景*/
[data-status="index"] .index {
    display: block;
}

[data-status="rule"] .rule {
    display: block;
}

[data-status="setting"] .setting {
    display: block;
}
[data-status="score"] .score {
    display: block;
}