html {
    transition: background-image 0.05s ease-in-out;
}

.起爆器按钮{
    /*屏幕底部居中*/
    position: fixed;
    bottom: 5vh;
    left: 50%;
    transform: translateX(-50%);
    z-index: 9999;

    /*头像框*/
    width: 128px;
    height: 128px;
    border-radius: 50%;
    padding: 0;
    border: 3px solid white;
    background: #fff;
    overflow: hidden;
    cursor: pointer;

    /*禁止选中拖拽*/
    user-select: none;
    -webkit-user-select: none;
    -webkit-user-drag: none;
    touch-action: manipulation;
    outline: none;
    touch-action: none;
    -webkit-touch-callout: none;
}

.起爆器按钮 img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    pointer-events: none;
}

/*点击时的晃动动画*/
.起爆器按钮:active {
    animation: shake 0.1s infinite;
    filter: brightness(1.1);
}

@keyframes shake {
    0% { transform: translateX(-50%) rotate(0deg); }
    25% { transform: translateX(-52%) rotate(-5deg); }
    50% { transform: translateX(-50%) rotate(0deg); }
    75% { transform: translateX(-48%) rotate(5deg); }
    100% { transform: translateX(-50%) rotate(0deg); }
}