* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    background-color: #1a1a1a;
    color: #f0f0f0;
    font-family: sans-serif;
    display: flex;
    justify-content: center;
}
#game-container {
    width: 100%;
    max-width: 600px; /* PC端限制最大宽度 */
    height: 100dvh;
    display: flex;
    flex-direction: column;
    background-color: #2a2a2a;
    position: relative;
}
#top-bar, #bottom-nav {
    background-color: #333;
    padding: 10px;
    display: flex;
    justify-content: space-between;
}
#scene-area {
    flex-grow: 1;
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 15px;
}
button {
    padding: 10px 15px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}