.lianxian{
    background: #222;
    border-radius: 6px;
    overflow: hidden;
    position: relative;
}

.night .lianxian{
    border:1px solid #444;
}

.lianxian i{
    color: #fff;
    font-weight: bold;
    position: absolute;
    top: 0.25rem;
    right: 0.25rem;
    cursor: pointer;
}

.night .lianxian i{
    color: #aaa;
}

.lianxian canvas{
    display: block;
    margin: 0 auto;
    border-radius: 6px;
    cursor: crosshair;
    background: #222;
    background-size: 28px 28px;
    overflow: hidden;
    width: 100%;
    aspect-ratio: 1200 / 360;
}

.lianalert{
    text-align: center;
    padding: 1rem 0.5rem;
}

.lianalert h2{
    font-size: 1rem;
    text-align: center;
    line-height: 1;
    margin-bottom: 0.75rem;
}

.lianalert button{
    padding: 0.4rem 0.8rem;
    margin-top: 1rem;
    background-color: #009688;
    border: 0;
    color: #fff;
    border-radius: 3px;
}