body {
    margin: 0;
    background: #f3f4f6;
    font-family: system-ui;
}

.container {
    max-width: 1600px;
    margin: 0 auto;
}

.topbar {
    height: 60px;
    background: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    border-bottom: 1px solid #ddd;
}

.main-grid {
    display: grid;
    grid-template-columns: 160px 1fr 260px;
    gap: 20px;
    margin-top: 20px;
}

.left-ad {
    display: flex;
    justify-content: center;
}

.ad-box {
    width: 120px;
    height: 600px;
    background: #ddd;
}

.game-center {
    background: white;
    padding: 10px;
    border-radius: 8px;
}

.game-frame {
    width: 100%;
    height: 900px;
    border: none;
}

.right-panel {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.panel-box {
    background: white;
    padding: 15px;
    border-radius: 8px;
}

.bottom {
    max-width: 1280px;
    margin: 40px auto;
    color: #444;
}