使用上下左右键玩

点击"开始游戏"按钮开始

使用键盘方向键或屏幕上的方向按钮控制蛇的移动

吃到红色食物增加10分和蛇的长度

吃到蓝色特殊食物增加50分并缩短蛇身

避免撞墙或自己的身体

游戏结束后点击"再来一次"重新开始

<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>贪吃蛇大冒险</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            background: linear-gradient(135deg, #1a1a2e, #16213e, #0f3460);
            overflow: hidden;
            color: #fff;
        }
        
        .game-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 20px;
            max-width: 1000px;
            width: 100%;
        }
        
        .header {
            text-align: center;
            margin-bottom: 20px;
            width: 100%;
        }
        
        h1 {
            font-size: 3.5rem;
            margin-bottom: 10px;
            color: #e94560;
            text-shadow: 0 0 10px rgba(233, 69, 96, 0.7);
            letter-spacing: 3px;
        }
        
        .stats-container {
            display: flex;
            justify-content: space-between;
            width: 100%;
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
            border-radius: 15px;
            padding: 15px 25px;
            margin-bottom: 20px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
        }
        
        .stat-box {
            text-align: center;
        }
        
        .stat-title {
            font-size: 1.1rem;
            color: #a9a9a9;
            margin-bottom: 5px;
        }
        
        .stat-value {
            font-size: 2.2rem;
            font-weight: bold;
            color: #4dccbd;
        }
        
        .game-board {
            position: relative;
            width: 600px;
            height: 450px;
            margin: 20px auto;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
        }
        
        canvas {
            background: rgba(13, 19, 33, 0.9);
            display: block;
        }
        
        .controls {
            display: flex;
            gap: 15px;
            margin-top: 20px;
            flex-wrap: wrap;
            justify-content: center;
        }
        
        button {
            padding: 12px 25px;
            font-size: 1.1rem;
            font-weight: 600;
            border: none;
            border-radius: 50px;
            cursor: pointer;
            transition: all 0.3s ease;
            background: linear-gradient(to right, #e94560, #ff6b81);
            color: white;
            box-shadow: 0 5px 15px rgba(233, 69, 96, 0.4);
        }
        
        button:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(233, 69, 96, 0.6);
        }
        
        button:active {
            transform: translateY(1px);
        }
        
        .difficulty {
            display: flex;
            gap: 10px;
            margin-top: 15px;
        }
        
        .difficulty-btn {
            padding: 8px 20px;
            font-size: 0.9rem;
            background: rgba(255, 255, 255, 0.1);
        }
        
        .difficulty-btn.active {
            background: linear-gradient(to right, #4dccbd, #3aafa9);
            box-shadow: 0 5px 15px rgba(77, 204, 189, 0.4);
        }
        
        .overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.85);
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            z-index: 10;
            border-radius: 15px;
        }
        
        .overlay h2 {
            font-size: 3rem;
            margin-bottom: 20px;
            color: #e94560;
        }
        
        .overlay p {
            font-size: 1.5rem;
            margin-bottom: 30px;
            text-align: center;
            max-width: 80%;
        }
        
        .instructions {
            background: rgba(255, 255, 255, 0.1);
            border-radius: 15px;
            padding: 20px;
            margin-top: 20px;
            width: 100%;
            max-width: 600px;
        }
        
        .instructions h3 {
            color: #4dccbd;
            margin-bottom: 10px;
            text-align: center;
        }
        
        .instructions ul {
            padding-left: 20px;
        }
        
        .instructions li {
            margin-bottom: 8px;
            line-height: 1.5;
        }
        
        .key {
            display: inline-block;
            background: rgba(255, 255, 255, 0.15);
            padding: 2px 8px;
            border-radius: 5px;
            font-family: monospace;
        }
        
        .mobile-controls {
            display: none;
            grid-template-columns: repeat(3, 1fr);
            grid-template-rows: repeat(2, 1fr);
            gap: 10px;
            margin-top: 20px;
            width: 200px;
            height: 200px;
        }
        
        .mobile-btn {
            display: flex;
            justify-content: center;
            align-items: center;
            background: rgba(255, 255, 255, 0.15);
            border-radius: 10px;
            font-size: 24px;
            font-weight: bold;
            user-select: none;
        }
        
        .up { grid-column: 2; grid-row: 1; }
        .left { grid-column: 1; grid-row: 2; }
        .right { grid-column: 3; grid-row: 2; }
        .down { grid-column: 2; grid-row: 3; }
        
        @media (max-width: 650px) {
            .game-board {
                width: 95vw;
                height: 70vw;
            }
            
            h1 {
                font-size: 2.5rem;
            }
            
            .stat-value {
                font-size: 1.8rem;
            }
            
            .mobile-controls {
                display: grid;
            }
        }
    </style>
</head>
<body>
    <div class="game-container">
        <div class="header">
            <h1>贪吃蛇大冒险</h1>
        </div>
        
        <div class="stats-container">
            <div class="stat-box">
                <div class="stat-title">当前分数</div>
                <div class="stat-value" id="score">0</div>
            </div>
            <div class="stat-box">
                <div class="stat-title">最高分数</div>
                <div class="stat-value" id="high-score">0</div>
            </div>
            <div class="stat-box">
                <div class="stat-title">游戏速度</div>
                <div class="stat-value" id="speed">5</div>
            </div>
        </div>
        
        <div class="game-board">
            <canvas id="game-canvas" width="600" height="450"></canvas>
            
            <div class="overlay" id="start-screen">
                <h2>贪吃蛇大冒险</h2>
                <p>使用方向键控制贪吃蛇，吃到食物获得分数！</p>
                <button id="start-btn">开始游戏</button>
            </div>
            
            <div class="overlay" id="game-over" style="display: none;">
                <h2>游戏结束!</h2>
                <p>你的分数: <span id="final-score">0</span></p>
                <button id="restart-btn">再来一次</button>
            </div>
        </div>
        
        <div class="controls">
            <button id="pause-btn">暂停</button>
            <button id="reset-btn">重新开始</button>
        </div>
        
        <div class="difficulty">
            <button class="difficulty-btn active" data-speed="120">简单</button>
            <button class="difficulty-btn" data-speed="80">中等</button>
            <button class="difficulty-btn" data-speed="50">困难</button>
            <button class="difficulty-btn" data-speed="30">地狱</button>
        </div>
        
        <div class="mobile-controls">
            <div class="mobile-btn up">↑</div>
            <div class="mobile-btn left">←</div>
            <div class="mobile-btn right">→</div>
            <div class="mobile-btn down">↓</div>
        </div>
        
        <div class="instructions">
            <h3>游戏说明</h3>
            <ul>
                <li>使用 <span class="key">方向键</span> 或 <span class="key">WASD</span> 控制贪吃蛇移动</li>
                <li>吃到 <span style="color: #ff6b6b">红色食物</span> 得10分，蛇身变长</li>
                <li>吃到 <span style="color: #4dccbd">特殊食物</span> 得50分，蛇身缩短</li>
                <li>撞到墙壁或自己的身体游戏结束</li>
                <li>难度越高，蛇移动速度越快</li>
            </ul>
        </div>
    </div>

    <script>
        // 游戏主逻辑
        document.addEventListener('DOMContentLoaded', () => {
            const canvas = document.getElementById('game-canvas');
            const ctx = canvas.getContext('2d');
            const scoreElement = document.getElementById('score');
            const highScoreElement = document.getElementById('high-score');
            const speedElement = document.getElementById('speed');
            const startScreen = document.getElementById('start-screen');
            const gameOverScreen = document.getElementById('game-over');
            const startBtn = document.getElementById('start-btn');
            const pauseBtn = document.getElementById('pause-btn');
            const resetBtn = document.getElementById('reset-btn');
            const restartBtn = document.getElementById('restart-btn');
            const finalScoreElement = document.getElementById('final-score');
            const difficultyBtns = document.querySelectorAll('.difficulty-btn');
            const mobileControls = document.querySelectorAll('.mobile-btn');
            
            // 游戏变量
            const gridSize = 20;
            const gridWidth = canvas.width / gridSize;
            const gridHeight = canvas.height / gridSize;
            let snake = [];
            let food = {};
            let specialFood = {};
            let direction = 'right';
            let nextDirection = 'right';
            let score = 0;
            let highScore = localStorage.getItem('snakeHighScore') || 0;
            let gameSpeed = 120; // 毫秒
            let gameInterval;
            let gameRunning = false;
            let gamePaused = false;
            let specialFoodActive = false;
            let specialFoodTimer = 0;
            
            // 初始化游戏
            function initGame() {
                // 初始化蛇
                snake = [
                    {x: 5, y: 10},
                    {x: 4, y: 10},
                    {x: 3, y: 10}
                ];
                
                // 生成食物
                generateFood();
                specialFoodActive = false;
                specialFoodTimer = 0;
                
                // 重置分数和方向
                score = 0;
                direction = 'right';
                nextDirection = 'right';
                updateScore();
                
                // 隐藏游戏结束界面
                gameOverScreen.style.display = 'none';
                
                // 设置最高分
                highScoreElement.textContent = highScore;
                
                // 绘制游戏
                draw();
            }
            
            // 生成食物
            function generateFood() {
                food = {
                    x: Math.floor(Math.random() * gridWidth),
                    y: Math.floor(Math.random() * gridHeight)
                };
                
                // 确保食物不出现在蛇身上
                for (let segment of snake) {
                    if (segment.x === food.x && segment.y === food.y) {
                        return generateFood();
                    }
                }
            }
            
            // 生成特殊食物
            function generateSpecialFood() {
                if (!specialFoodActive && Math.random() > 0.7) {
                    specialFood = {
                        x: Math.floor(Math.random() * gridWidth),
                        y: Math.floor(Math.random() * gridHeight)
                    };
                    
                    // 确保特殊食物不出现在蛇身上或普通食物上
                    for (let segment of snake) {
                        if (segment.x === specialFood.x && segment.y === specialFood.y) {
                            return generateSpecialFood();
                        }
                    }
                    
                    if (specialFood.x === food.x && specialFood.y === food.y) {
                        return generateSpecialFood();
                    }
                    
                    specialFoodActive = true;
                    specialFoodTimer = 300; // 特殊食物存在300帧
                }
            }
            
            // 绘制游戏
            function draw() {
                // 清空画布
                ctx.clearRect(0, 0, canvas.width, canvas.height);
                
                // 绘制网格背景
                drawGrid();
                
                // 绘制蛇
                drawSnake();
                
                // 绘制食物
                drawFood();
                
                // 绘制特殊食物
                if (specialFoodActive) {
                    drawSpecialFood();
                }
            }
            
            // 绘制网格
            function drawGrid() {
                ctx.strokeStyle = 'rgba(255, 255, 255, 0.05)';
                ctx.lineWidth = 0.5;
                
                // 垂直线
                for (let x = 0; x < canvas.width; x += gridSize) {
                    ctx.beginPath();
                    ctx.moveTo(x, 0);
                    ctx.lineTo(x, canvas.height);
                    ctx.stroke();
                }
                
                // 水平线
                for (let y = 0; y < canvas.height; y += gridSize) {
                    ctx.beginPath();
                    ctx.moveTo(0, y);
                    ctx.lineTo(canvas.width, y);
                    ctx.stroke();
                }
            }
            
            // 绘制蛇
            function drawSnake() {
                // 绘制蛇身
                for (let i = 0; i < snake.length; i++) {
                    const segment = snake[i];
                    
                    // 蛇头
                    if (i === 0) {
                        ctx.fillStyle = '#4dccbd';
                        ctx.fillRect(segment.x * gridSize, segment.y * gridSize, gridSize, gridSize);
                        
                        // 蛇头高光
                        ctx.fillStyle = '#7bdef0';
                        ctx.fillRect(segment.x * gridSize + 4, segment.y * gridSize + 4, gridSize - 8, gridSize - 8);
                        
                        // 眼睛
                        ctx.fillStyle = '#1a1a2e';
                        if (direction === 'right') {
                            ctx.fillRect(segment.x * gridSize + 12, segment.y * gridSize + 5, 4, 4);
                            ctx.fillRect(segment.x * gridSize + 12, segment.y * gridSize + 11, 4, 4);
                        } else if (direction === 'left') {
                            ctx.fillRect(segment.x * gridSize + 4, segment.y * gridSize + 5, 4, 4);
                            ctx.fillRect(segment.x * gridSize + 4, segment.y * gridSize + 11, 4, 4);
                        } else if (direction === 'up') {
                            ctx.fillRect(segment.x * gridSize + 5, segment.y * gridSize + 4, 4, 4);
                            ctx.fillRect(segment.x * gridSize + 11, segment.y * gridSize + 4, 4, 4);
                        } else if (direction === 'down') {
                            ctx.fillRect(segment.x * gridSize + 5, segment.y * gridSize + 12, 4, 4);
                            ctx.fillRect(segment.x * gridSize + 11, segment.y * gridSize + 12, 4, 4);
                        }
                    } 
                    // 蛇身
                    else {
                        ctx.fillStyle = '#3aafa9';
                        ctx.fillRect(segment.x * gridSize, segment.y * gridSize, gridSize, gridSize);
                        
                        // 蛇身内部
                        ctx.fillStyle = '#4dccbd';
                        ctx.fillRect(segment.x * gridSize + 4, segment.y * gridSize + 4, gridSize - 8, gridSize - 8);
                    }
                }
            }
            
            // 绘制食物
            function drawFood() {
                // 食物主体
                ctx.fillStyle = '#ff6b6b';
                ctx.beginPath();
                ctx.arc(
                    food.x * gridSize + gridSize / 2,
                    food.y * gridSize + gridSize / 2,
                    gridSize / 2 - 2,
                    0,
                    Math.PI * 2
                );
                ctx.fill();
                
                // 食物高光
                ctx.fillStyle = '#ff9e9e';
                ctx.beginPath();
                ctx.arc(
                    food.x * gridSize + gridSize / 3,
                    food.y * gridSize + gridSize / 3,
                    gridSize / 6,
                    0,
                    Math.PI * 2
                );
                ctx.fill();
            }
            
            // 绘制特殊食物
            function drawSpecialFood() {
                // 特殊食物主体
                ctx.fillStyle = '#4dccbd';
                ctx.beginPath();
                ctx.arc(
                    specialFood.x * gridSize + gridSize / 2,
                    specialFood.y * gridSize + gridSize / 2,
                    gridSize / 2 - 2,
                    0,
                    Math.PI * 2
                );
                ctx.fill();
                
                // 特殊食物闪烁效果
                if (Math.floor(specialFoodTimer / 10) % 2 === 0) {
                    ctx.fillStyle = '#7bdef0';
                    ctx.beginPath();
                    ctx.arc(
                        specialFood.x * gridSize + gridSize / 2,
                        specialFood.y * gridSize + gridSize / 2,
                        gridSize / 4,
                        0,
                        Math.PI * 2
                    );
                    ctx.fill();
                }
            }
            
            // 更新游戏状态
            function update() {
                if (gamePaused) return;
                
                // 更新特殊食物计时器
                if (specialFoodActive) {
                    specialFoodTimer--;
                    if (specialFoodTimer <= 0) {
                        specialFoodActive = false;
                    }
                } else {
                    generateSpecialFood();
                }
                
                // 更新方向
                direction = nextDirection;
                
                // 计算新蛇头位置
                const head = {x: snake[0].x, y: snake[0].y};
                
                switch (direction) {
                    case 'up':
                        head.y--;
                        break;
                    case 'down':
                        head.y++;
                        break;
                    case 'left':
                        head.x--;
                        break;
                    case 'right':
                        head.x++;
                        break;
                }
                
                // 检查游戏结束条件
                if (
                    head.x < 0 || 
                    head.y < 0 || 
                    head.x >= gridWidth || 
                    head.y >= gridHeight ||
                    checkCollision(head)
                ) {
                    gameOver();
                    return;
                }
                
                // 添加新蛇头
                snake.unshift(head);
                
                // 检查是否吃到食物
                if (head.x === food.x && head.y === food.y) {
                    // 增加分数
                    score += 10;
                    updateScore();
                    
                    // 生成新食物
                    generateFood();
                } 
                // 检查是否吃到特殊食物
                else if (specialFoodActive && head.x === specialFood.x && head.y === specialFood.y) {
                    // 增加分数
                    score += 50;
                    updateScore();
                    
                    // 缩短蛇身（最多保留3节）
                    if (snake.length > 3) {
                        snake.pop();
                        if (snake.length > 3) snake.pop();
                    }
                    
                    specialFoodActive = false;
                } 
                // 没吃到食物，移除蛇尾
                else {
                    snake.pop();
                }
                
                // 绘制游戏
                draw();
            }
            
            // 检查碰撞
            function checkCollision(position) {
                for (let i = 1; i < snake.length; i++) {
                    if (snake[i].x === position.x && snake[i].y === position.y) {
                        return true;
                    }
                }
                return false;
            }
            
            // 更新分数显示
            function updateScore() {
                scoreElement.textContent = score;
                speedElement.textContent = Math.floor(1500 / gameSpeed);
                
                // 更新最高分
                if (score > highScore) {
                    highScore = score;
                    highScoreElement.textContent = highScore;
                    localStorage.setItem('snakeHighScore', highScore);
                }
            }
            
            // 游戏结束
            function gameOver() {
                clearInterval(gameInterval);
                gameRunning = false;
                
                finalScoreElement.textContent = score;
                gameOverScreen.style.display = 'flex';
            }
            
            // 开始游戏
            function startGame() {
                if (gameRunning) return;
                
                initGame();
                gameRunning = true;
                gamePaused = false;
                startScreen.style.display = 'none';
                pauseBtn.textContent = '暂停';
                
                gameInterval = setInterval(update, gameSpeed);
            }
            
            // 暂停游戏
            function togglePause() {
                if (!gameRunning) return;
                
                gamePaused = !gamePaused;
                pauseBtn.textContent = gamePaused ? '继续' : '暂停';
            }
            
            // 重置游戏
            function resetGame() {
                clearInterval(gameInterval);
                startGame();
            }
            
            // 键盘控制
            document.addEventListener('keydown', (e) => {
                if (!gameRunning) return;
                
                switch (e.key) {
                    case 'ArrowUp':
                    case 'w':
                    case 'W':
                        if (direction !== 'down') nextDirection = 'up';
                        break;
                    case 'ArrowDown':
                    case 's':
                    case 'S':
                        if (direction !== 'up') nextDirection = 'down';
                        break;
                    case 'ArrowLeft':
                    case 'a':
                    case 'A':
                        if (direction !== 'right') nextDirection = 'left';
                        break;
                    case 'ArrowRight':
                    case 'd':
                    case 'D':
                        if (direction !== 'left') nextDirection = 'right';
                        break;
                    case ' ':
                        togglePause();
                        break;
                }
            });
            
            // 移动端控制
            mobileControls.forEach(btn => {
                btn.addEventListener('click', () => {
                    if (!gameRunning) return;
                    
                    const directionMap = {
                        'up': () => { if (direction !== 'down') nextDirection = 'up'; },
                        'down': () => { if (direction !== 'up') nextDirection = 'down'; },
                        'left': () => { if (direction !== 'right') nextDirection = 'left'; },
                        'right': () => { if (direction !== 'left') nextDirection = 'right'; }
                    };
                    
                    directionMap[btn.classList[1]]();
                });
            });
            
            // 难度选择
            difficultyBtns.forEach(btn => {
                btn.addEventListener('click', () => {
                    // 更新活动按钮
                    difficultyBtns.forEach(b => b.classList.remove('active'));
                    btn.classList.add('active');
                    
                    // 更新游戏速度
                    gameSpeed = parseInt(btn.dataset.speed);
                    speedElement.textContent = Math.floor(1500 / gameSpeed);
                    
                    // 如果游戏正在运行，更新游戏速度
                    if (gameRunning) {
                        clearInterval(gameInterval);
                        gameInterval = setInterval(update, gameSpeed);
                    }
                });
            });
            
            // 按钮事件监听
            startBtn.addEventListener('click', startGame);
            pauseBtn.addEventListener('click', togglePause);
            resetBtn.addEventListener('click', resetGame);
            restartBtn.addEventListener('click', startGame);
            
            // 初始化
            initGame();
            highScoreElement.textContent = highScore;
        });
    </script>
</body>
</html>
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