* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: linear-gradient(135deg, #0c0c2e, #1a1a3e);
    color: #fff;
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
    background: rgba(0, 0, 50, 0.5);
    border-radius: 15px;
    border: 2px solid #4a9eff;
    box-shadow: 0 0 20px rgba(74, 158, 255, 0.3);
}

h1 {
    color: #4a9eff;
    font-size: 2.5rem;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.subtitle {
    color: #a3d5ff;
    font-size: 1.1rem;
}

.game-container {
    background: rgba(10, 15, 40, 0.8);
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 30px;
    border: 2px solid #2a5caa;
}

.game-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    flex-wrap: wrap;
    gap: 20px;
}

.score-board {
    display: flex;
    gap: 30px;
}

.score-item {
    background: rgba(0, 30, 70, 0.7);
    padding: 15px 25px;
    border-radius: 10px;
    text-align: center;
    border: 1px solid #3a7bd5;
    min-width: 120px;
}

.label {
    display: block;
    color: #a3d5ff;
    font-size: 0.9rem;
    margin-bottom: 5px;
}

.value {
    display: block;
    font-size: 2rem;
    font-weight: bold;
    color: #4affff;
    text-shadow: 0 0 10px #00ffff;
}

.controls {
    display: flex;
    gap: 15px;
}

.btn {
    background: linear-gradient(to bottom, #3a7bd5, #2a5caa);
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s;
    font-weight: bold;
}

.btn:hover {
    background: linear-gradient(to bottom, #4a9eff, #3a7bd5);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(74, 158, 255, 0.4);
}

.btn:active {
    transform: translateY(0);
}

.game-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 25px;
}

#gameCanvas {
    background: #000;
    border-radius: 10px;
    border: 3px solid #4a9eff;
    box-shadow: 0 0 25px rgba(74, 158, 255, 0.5);
    display: block;
}

.instructions {
    background: rgba(20, 30, 60, 0.7);
    padding: 20px;
    border-radius: 10px;
    width: 100%;
    max-width: 800px;
    border: 1px solid #3a7bd5;
}

.instructions h3 {
    color: #4affff;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.instructions ul {
    list-style: none;
    padding-left: 0;
}

.instructions li {
    margin-bottom: 10px;
    padding: 8px 15px;
    background: rgba(0, 40, 80, 0.5);
    border-radius: 6px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.features {
    background: rgba(10, 15, 40, 0.8);
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 30px;
    border: 2px solid #2a5caa;
}

.features h2 {
    color: #4a9eff;
    text-align: center;
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.feature {
    background: rgba(0, 30, 70, 0.7);
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    border: 1px solid #3a7bd5;
    transition: transform 0.3s;
}

.feature:hover {
    transform: translateY(-5px);
    border-color: #4affff;
}

.feature i {
    font-size: 2.5rem;
    color: #4affff;
    margin-bottom: 15px;
}

.feature h3 {
    color: #a3d5ff;
    margin-bottom: 10px;
}

.feature p {
    color: #88bbff;
    font-size: 0.9rem;
}

footer {
    text-align: center;
    padding: 20px;
    color: #88bbff;
    font-size: 0.9rem;
    border-top: 1px solid #2a5caa;
}

.vscode-badge {
    margin-top: 10px;
    padding: 10px 20px;
    background: rgba(0, 60, 120, 0.3);
    border-radius: 20px;
    display: inline-block;
    border: 1px solid #4a9eff;
}

/* 响应式设计 */
@media (max-width: 850px) {
    .game-info {
        flex-direction: column;
        align-items: stretch;
    }
    
    .score-board {
        justify-content: center;
    }
    
    .controls {
        justify-content: center;
    }
    
    #gameCanvas {
        width: 95%;
        height: auto;
    }
    
    h1 {
        font-size: 2rem;
    }
}

@media (max-width: 600px) {
    .score-board {
        flex-direction: column;
        align-items: center;
    }
    
    .score-item {
        width: 100%;
        max-width: 200px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
}