body {
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #a8edea, #fed6e3);
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    color: #333;
}

.container {
    text-align: center;
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: 15px;
    padding: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    max-width: 600px;
    width: 100%;
}

h1 {
    color: #e84393;
    margin-top: 0;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
}

.game-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding: 10px;
    background-color: #f8f9fa;
    border-radius: 10px;
}

.level, .moves {
    font-size: 18px;
    font-weight: bold;
    color: #e84393;
}

#reset-btn {
    padding: 10px 20px;
    font-size: 16px;
    background-color: #00b894;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

#reset-btn:hover {
    background-color: #00a085;
}

.controls {
    margin-bottom: 15px;
}

#prev-level, #next-level {
    padding: 8px 15px;
    font-size: 14px;
    background-color: #6c5ce7;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
    margin: 0 5px;
}

#prev-level:hover, #next-level:hover {
    background-color: #5d4de0;
}

#prev-level:disabled, #next-level:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

.game-board {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    grid-gap: 2px;
    width: 360px;
    height: 360px;
    margin: 0 auto 20px;
    background-color: #ddd;
    border: 3px solid #2d3436;
    border-radius: 5px;
    padding: 5px;
    position: relative;
}

.cell {
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
    font-weight: bold;
    border-radius: 3px;
    background-color: #dfe6e9;
}

.exit {
    background-color: #00b894;
    position: relative;
}

.exit::after {
    content: "🏁";
    font-size: 20px;
}

.vehicle {
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
    border-radius: 5px;
    cursor: move;
    transition: transform 0.2s;
    user-select: none;
}

.vehicle:hover {
    transform: scale(1.05);
}

.vehicle.selected {
    box-shadow: 0 0 0 3px #e84393;
}

.vehicle-1 { /* 水平2格 */
    grid-column: span 2;
    height: 100%;
}

.vehicle-2 { /* 垂直2格 */
    grid-row: span 2;
    width: 100%;
}

.vehicle-3 { /* 水平3格 */
    grid-column: span 3;
    height: 100%;
}

.vehicle-4 { /* 垂直3格 */
    grid-row: span 3;
    width: 100%;
}

.vehicle-5 { /* 红色目标车辆 */
    grid-column: span 2;
    height: 100%;
    background-color: #ff0000 !important;
    color: white;
}

.instructions {
    background-color: #f8f9fa;
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 20px;
}

.instructions p {
    margin: 0;
    color: #636e72;
    font-size: 14px;
}

.win-message {
    display: none;
    margin-top: 20px;
    padding: 20px;
    background-color: #d4edda;
    border: 1px solid #c3e6cb;
    border-radius: 10px;
    color: #155724;
}

.win-message p {
    margin: 10px 0;
    font-size: 18px;
}

#next-level-btn, #play-again-btn {
    padding: 10px 20px;
    font-size: 16px;
    background-color: #e84393;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
    margin: 0 10px;
}

#next-level-btn:hover, #play-again-btn:hover {
    background-color: #d73785;
}

/* 响应式设计 */
@media (max-width: 500px) {
    .game-board {
        width: 300px;
        height: 300px;
    }
    
    .container {
        padding: 15px;
    }
}