body {
    background-color: #000;
    color: #fff;
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    text-align: center;
}

#game-container {
    border: 1px solid #333;
    padding: 2rem;
}

h1 {
    color: #777;
}

p {
    color: #555;
}

button {
    background-color: #111;
    color: #fff;
    border: 1px solid #333;
    padding: 10px 20px;
    cursor: pointer;
    font-size: 1rem;
}

button:hover {
    background-color: #333;
}

.clickable-area {
    position: absolute;
    top: 0;
    width: 50%;
    height: 100%;
    cursor: pointer;
    /* background-color: rgba(255, 0, 0, 0.1); */ /* 取消注释以进行调试 */
}

.clickable-area.left {
    left: 0;
}

.clickable-area.right {
    right: 0;
}