body {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #FF6B6B, #4ECDC4);
    font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, sans-serif;
    color: #333;
}

.game-container {
    text-align: center;
    background-color: rgba(255, 255, 255, 0.95);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 
        0 10px 30px rgba(0, 0, 0, 0.1),
        0 0 20px rgba(255, 255, 255, 0.5),
        inset 0 0 15px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    max-width: 90%;
    width: 500px;
    border: 1px solid rgba(255, 255, 255, 0.8);
}

h1 {
    color: #FF6B6B;
    margin-bottom: 1.2rem;
    font-weight: 500;
    font-size: 2.2rem;
}

.game-stats {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 1.2rem;
    margin-bottom: 1.2rem;
}

.stat-box {
    background: #f8f9fa;
    padding: 0.6rem 1rem;
    border-radius: 8px;
    min-width: 60px;
    box-shadow: 
        0 3px 10px rgba(0, 0, 0, 0.08),
        inset 0 0 5px rgba(0, 0, 0, 0.05),
        -2px -2px 5px rgba(255, 255, 255, 0.9),
        2px 2px 6px rgba(0, 0, 0, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.9);
}

.stat-label {
    display: block;
    font-size: 0.8rem;
    color: #666;
    margin-bottom: 0.2rem;
}

.stat-value {
    display: block;
    font-size: 1.2rem;
    font-weight: 500;
    color: #FF6B6B;
}

#gameCanvas {
    background-color: rgba(248, 249, 250, 0.95);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.8);
    box-shadow: 
        0 6px 16px rgba(0, 0, 0, 0.12),         /* 外阴影 */
        0 0 20px rgba(255, 255, 255, 0.9),       /* 外发光 */
        0 0 0 1px rgba(255, 255, 255, 0.5);      /* 边缘光晕 */
    margin: 1.5rem 0;
    backdrop-filter: blur(8px);
    position: relative;
}

/* 修改边缘发光效果 */
#gameCanvas::after {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: 13px;
    padding: 1px;
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.7),                /* 增强顶部边缘亮度 */
        rgba(255, 255, 255, 0.3)                 /* 底部边缘稍微暗一些 */
    );
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
}

.controls {
    margin-top: 1.5rem;
}

#startBtn {
    background: rgba(255, 107, 107, 0.9);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 
        0 4px 12px rgba(255, 107, 107, 0.3),
        0 0 20px rgba(255, 255, 255, 0.3),
        inset 0 0 8px rgba(255, 255, 255, 0.2);
    color: white;
    padding: 12px 30px;
    font-size: 1rem;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-weight: 500;
    transform: translateZ(0);
    outline: none;
}

#startBtn:focus {
    outline: none;
    box-shadow: 
        0 4px 12px rgba(255, 107, 107, 0.3),
        0 0 20px rgba(255, 255, 255, 0.3),
        inset 0 0 8px rgba(255, 255, 255, 0.2);
}

#startBtn:hover {
    background: rgba(255, 82, 82, 0.95);
    transform: translateY(-2px) scale(1.02);
    box-shadow: 
        0 6px 15px rgba(255, 107, 107, 0.4),
        0 0 25px rgba(255, 255, 255, 0.4),
        inset 0 0 10px rgba(255, 255, 255, 0.3);
}

#startBtn:active {
    transform: translateY(1px) scale(0.98);
    transition: all 0.1s;
    outline: none;
}

.instructions {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: #666;
}

@media (max-width: 600px) {
    .game-container {
        padding: 1rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    #gameCanvas {
        width: 100%;
        height: auto;
    }
}