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<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
    <title>精致俄罗斯方块</title>
    <script src="https://cdn.tailwindcss.com"></script>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
    <style>
        @import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');
        
        :root {
            --primary: #6366f1;
            --primary-dark: #4f46e5;
            --secondary: #f43f5e;
            --dark: #1e293b;
            --light: #f8fafc;
            --gray: #94a3b8;
            --success: #10b981;
        }
        
        body {
            font-family: 'Inter', sans-serif;
            background-color: #f1f5f9;
            color: var(--dark);
            touch-action: manipulation;
            -webkit-tap-highlight-color: transparent;
        }
        
        .game-container {
            perspective: 1000px;
        }
        
        .tetris-board {
            background: linear-gradient(145deg, #ffffff, #e2e8f0);
            box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
            border-radius: 12px;
            overflow: hidden;
            position: relative;
        }
        
        .cell {
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: all 0.2s ease;
        }
        
        .cell.filled {
            box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.2);
        }
        
        .piece-i { background-color: #06b6d4; }
        .piece-j { background-color: #3b82f6; }
        .piece-l { background-color: #f59e0b; }
        .piece-o { background-color: #10b981; }
        .piece-s { background-color: #ef4444; }
        .piece-t { background-color: #8b5cf6; }
        .piece-z { background-color: #ec4899; }
        
        .next-piece-container {
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(10px);
            border-radius: 8px;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
        }
        
        .control-btn {
            background: rgba(255, 255, 255, 0.9);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            border-radius: 50%;
            width: 60px;
            height: 60px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            user-select: none;
            transition: all 0.2s ease;
        }
        
        .control-btn:active {
            transform: scale(0.95);
            box-shadow: 0 2px 3px -1px rgba(0, 0, 0, 0.1);
        }
        
        .game-overlay {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(30, 41, 59, 0.8);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            z-index: 10;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s ease;
        }
        
        .game-overlay.active {
            opacity: 1;
            pointer-events: all;
        }
        
        .pause-btn {
            position: absolute;
            top: 16px;
            right: 16px;
            background: rgba(255, 255, 255, 0.9);
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            cursor: pointer;
            z-index: 5;
        }
        
        .score-display {
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-radius: 8px;
            padding: 12px 16px;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
        }
        
        @media (max-width: 640px) {
            .control-btn {
                width: 50px;
                height: 50px;
            }
        }
    </style>
</head>
<body class="min-h-screen flex flex-col items-center justify-center p-4">
    <div class="w-full max-w-md mx-auto">
        <div class="flex justify-between items-center mb-4">
            <h1 class="text-2xl font-bold text-gray-800">精致俄罗斯方块</h1>
            <div class="score-display flex items-center space-x-4">
                <div class="text-center">
                    <p class="text-xs text-gray-500">分数</p>
                    <p class="font-bold text-gray-800 text-lg" id="score">0</p>
                </div>
                <div class="text-center">
                    <p class="text-xs text-gray-500">等级</p>
                    <p class="font-bold text-gray-800 text-lg" id="level">1</p>
                </div>
            </div>
        </div>
        
        <div class="game-container relative">
            <div class="tetris-board w-full aspect-[10/20] relative" id="board">
                <!-- 游戏板将通过JS生成 -->
            </div>
            
            <div class="pause-btn" id="pauseBtn">
                <i class="fas fa-pause text-gray-700"></i>
            </div>
            
            <div class="game-overlay" id="gameOverlay">
                <div class="bg-white rounded-xl p-6 w-full max-w-xs text-center">
                    <h2 class="text-2xl font-bold mb-2" id="overlayTitle">游戏暂停</h2>
                    <p class="text-gray-600 mb-6" id="overlayText">点击继续按钮返回游戏</p>
                    <button class="w-full bg-indigo-600 hover:bg-indigo-700 text-white py-3 px-4 rounded-lg font-medium transition" id="overlayBtn">
                        继续游戏
                    </button>
                </div>
            </div>
        </div>
        
        <div class="flex justify-between items-center mt-4">
            <div class="next-piece-container p-3">
                <p class="text-xs text-gray-500 mb-1">下一个</p>
                <div class="w-16 h-16" id="nextPiece">
                    <!-- 下一个方块将通过JS生成 -->
                </div>
            </div>
            
            <div class="flex space-x-4">
                <button class="control-btn" id="rotateBtn">
                    <i class="fas fa-rotate text-gray-700 text-xl"></i>
                </button>
                <button class="control-btn bg-indigo-600" id="dropBtn">
                    <i class="fas fa-arrow-down text-white text-xl"></i>
                </button>
            </div>
        </div>
        
        <div class="grid grid-cols-3 gap-4 mt-6">
            <button class="control-btn mx-auto" id="leftBtn">
                <i class="fas fa-arrow-left text-gray-700 text-xl"></i>
            </button>
            <button class="control-btn mx-auto" id="downBtn">
                <i class="fas fa-arrow-down text-gray-700 text-xl"></i>
            </button>
            <button class="control-btn mx-auto" id="rightBtn">
                <i class="fas fa-arrow-right text-gray-700 text-xl"></i>
            </button>
        </div>
    </div>

    <script>
        document.addEventListener('DOMContentLoaded', () => {
            // 游戏常量
            const ROWS = 20;
            const COLS = 10;
            const BLOCK_SIZE = 30;
            const COLORS = [
                null,
                '#06b6d4', // I - 青色
                '#3b82f6', // J - 蓝色
                '#f59e0b', // L - 橙色
                '#10b981', // O - 绿色
                '#ef4444', // S - 红色
                '#8b5cf6', // T - 紫色
                '#ec4899'  // Z - 粉色
            ];
            
            // 方块形状定义
            const SHAPES = [
                null,
                [[0, 0, 0, 0], [1, 1, 1, 1], [0, 0, 0, 0], [0, 0, 0, 0]], // I
                [[2, 0, 0], [2, 2, 2], [0, 0, 0]],                         // J
                [[0, 0, 3], [3, 3, 3], [0, 0, 0]],                         // L
                [[0, 4, 4], [0, 4, 4], [0, 0, 0]],                         // O
                [[0, 5, 5], [5, 5, 0], [0, 0, 0]],                         // S
                [[0, 6, 0], [6, 6, 6], [0, 0, 0]],                         // T
                [[7, 7, 0], [0, 7, 7], [0, 0, 0]]                          // Z
            ];
            
            // 游戏状态
            let board = createBoard(ROWS, COLS);
            let piece = null;
            let nextPiece = null;
            let score = 0;
            let level = 1;
            let gameOver = false;
            let isPaused = false;
            let dropInterval = null;
            let dropSpeed = 1000; // 初始下落速度(ms)
            
            // DOM元素
            const boardElement = document.getElementById('board');
            const nextPieceElement = document.getElementById('nextPiece');
            const scoreElement = document.getElementById('score');
            const levelElement = document.getElementById('level');
            const pauseBtn = document.getElementById('pauseBtn');
            const gameOverlay = document.getElementById('gameOverlay');
            const overlayTitle = document.getElementById('overlayTitle');
            const overlayText = document.getElementById('overlayText');
            const overlayBtn = document.getElementById('overlayBtn');
            const leftBtn = document.getElementById('leftBtn');
            const rightBtn = document.getElementById('rightBtn');
            const downBtn = document.getElementById('downBtn');
            const rotateBtn = document.getElementById('rotateBtn');
            const dropBtn = document.getElementById('dropBtn');
            
            // 初始化游戏板
            function createBoard(rows, cols) {
                return Array.from({ length: rows }, () => Array(cols).fill(0));
            }
            
            // 绘制游戏板
            function drawBoard() {
                boardElement.innerHTML = '';
                
                for (let r = 0; r < ROWS; r++) {
                    for (let c = 0; c < COLS; c++) {
                        const cell = document.createElement('div');
                        cell.className = 'cell absolute';
                        cell.style.width = `${BLOCK_SIZE}px`;
                        cell.style.height = `${BLOCK_SIZE}px`;
                        cell.style.left = `${c * BLOCK_SIZE}px`;
                        cell.style.top = `${r * BLOCK_SIZE}px`;
                        
                        if (board[r][c]) {
                            cell.classList.add('filled');
                            cell.style.backgroundColor = COLORS[board[r][c]];
                        } else {
                            cell.style.backgroundColor = 'transparent';
                        }
                        
                        boardElement.appendChild(cell);
                    }
                }
            }
            
            // 绘制当前方块
            function drawPiece() {
                if (!piece) return;
                
                for (let r = 0; r < piece.shape.length; r++) {
                    for (let c = 0; c < piece.shape[r].length; c++) {
                        if (piece.shape[r][c]) {
                            const cell = document.createElement('div');
                            cell.className = 'cell absolute filled';
                            cell.style.width = `${BLOCK_SIZE}px`;
                            cell.style.height = `${BLOCK_SIZE}px`;
                            cell.style.left = `${(piece.col + c) * BLOCK_SIZE}px`;
                            cell.style.top = `${(piece.row + r) * BLOCK_SIZE}px`;
                            cell.style.backgroundColor = COLORS[piece.shape[r][c]];
                            cell.classList.add(`piece-${String.fromCharCode(96 + piece.shape[r][c])}`);
                            boardElement.appendChild(cell);
                        }
                    }
                }
            }
            
            // 绘制下一个方块预览
            function drawNextPiece() {
                nextPieceElement.innerHTML = '';
                
                if (!nextPiece) return;
                
                const size = Math.max(nextPiece.shape.length, nextPiece.shape[0].length);
                const blockSize = 64 / size;
                
                for (let r = 0; r < nextPiece.shape.length; r++) {
                    for (let c = 0; c < nextPiece.shape[r].length; c++) {
                        if (nextPiece.shape[r][c]) {
                            const cell = document.createElement('div');
                            cell.className = 'cell absolute filled';
                            cell.style.width = `${blockSize}px`;
                            cell.style.height = `${blockSize}px`;
                            cell.style.left = `${c * blockSize}px`;
                            cell.style.top = `${r * blockSize}px`;
                            cell.style.backgroundColor = COLORS[nextPiece.shape[r][c]];
                            nextPieceElement.appendChild(cell);
                        }
                    }
                }
            }
            
            // 创建新方块
            function createPiece() {
                if (!nextPiece) {
                    // 第一次生成两个方块，一个作为当前，一个作为下一个
                    const shapeIndex1 = Math.floor(Math.random() * 7) + 1;
                    const shapeIndex2 = Math.floor(Math.random() * 7) + 1;
                    
                    piece = {
                        shape: SHAPES[shapeIndex1],
                        row: 0,
                        col: Math.floor(COLS / 2) - Math.floor(SHAPES[shapeIndex1][0].length / 2),
                        type: shapeIndex1
                    };
                    
                    nextPiece = {
                        shape: SHAPES[shapeIndex2],
                        type: shapeIndex2
                    };
                } else {
                    // 使用之前生成的下一个方块
                    piece = {
                        shape: nextPiece.shape,
                        row: 0,
                        col: Math.floor(COLS / 2) - Math.floor(nextPiece.shape[0].length / 2),
                        type: nextPiece.type
                    };
                    
                    // 生成新的下一个方块
                    const shapeIndex = Math.floor(Math.random() * 7) + 1;
                    nextPiece = {
                        shape: SHAPES[shapeIndex],
                        type: shapeIndex
                    };
                }
                
                // 检查游戏是否结束
                if (isCollision()) {
                    gameOver = true;
                    showOverlay('游戏结束', `最终得分: ${score}`, '重新开始');
                }
                
                drawNextPiece();
            }
            
            // 检查碰撞
            function isCollision(offsetRow = 0, offsetCol = 0, testShape = null) {
                const shapeToTest = testShape || piece.shape;
                
                for (let r = 0; r < shapeToTest.length; r++) {
                    for (let c = 0; c < shapeToTest[r].length; c++) {
                        if (shapeToTest[r][c]) {
                            const newRow = piece.row + r + offsetRow;
                            const newCol = piece.col + c + offsetCol;
                            
                            if (
                                newRow >= ROWS || 
                                newCol < 0 || 
                                newCol >= COLS || 
                                (newRow >= 0 && board[newRow][newCol])
                            ) {
                                return true;
                            }
                        }
                    }
                }
                
                return false;
            }
            
            // 锁定方块到游戏板
            function lockPiece() {
                for (let r = 0; r < piece.shape.length; r++) {
                    for (let c = 0; c < piece.shape[r].length; c++) {
                        if (piece.shape[r][c]) {
                            const boardRow = piece.row + r;
                            if (boardRow >= 0) { // 防止在顶部锁定
                                board[boardRow][piece.col + c] = piece.shape[r][c];
                            }
                        }
                    }
                }
                
                // 检查是否有完整的行
                checkRows();
                
                // 创建新方块
                createPiece();
            }
            
            // 检查并清除完整的行
            function checkRows() {
                let linesCleared = 0;
                
                for (let r = ROWS - 1; r >= 0; r--) {
                    if (board[r].every(cell => cell !== 0)) {
                        // 移除该行
                        board.splice(r, 1);
                        // 在顶部添加新行
                        board.unshift(Array(COLS).fill(0));
                        linesCleared++;
                        r++; // 重新检查当前行(现在是新行)
                    }
                }
                
                if (linesCleared > 0) {
                    // 更新分数
                    updateScore(linesCleared);
                }
            }
            
            // 更新分数
            function updateScore(lines) {
                // 计分规则: 1行=100, 2行=300, 3行=500, 4行=800
                const points = [0, 100, 300, 500, 800][lines];
                score += points * level;
                
                // 每1000分升一级
                const newLevel = Math.floor(score / 1000) + 1;
                if (newLevel > level) {
                    level = newLevel;
                    levelElement.textContent = level;
                    
                    // 提高速度(最高10级)
                    dropSpeed = Math.max(100, 1000 - (level - 1) * 100);
                    resetDropInterval();
                }
                
                scoreElement.textContent = score;
            }
            
            // 移动方块
            function movePiece(offsetRow, offsetCol) {
                if (gameOver || isPaused) return;
                
                if (!isCollision(offsetRow, offsetCol)) {
                    piece.row += offsetRow;
                    piece.col += offsetCol;
                    draw();
                    return true;
                }
                
                // 如果是向下移动且发生碰撞，则锁定方块
                if (offsetRow === 1) {
                    lockPiece();
                    draw();
                }
                
                return false;
            }
            
            // 旋转方块
            function rotatePiece() {
                if (gameOver || isPaused) return;
                
                // 创建旋转后的形状
                const newShape = [];
                for (let c = 0; c < piece.shape[0].length; c++) {
                    const newRow = [];
                    for (let r = piece.shape.length - 1; r >= 0; r--) {
                        newRow.push(piece.shape[r][c]);
                    }
                    newShape.push(newRow);
                }
                
                // 检查旋转后是否会碰撞
                if (!isCollision(0, 0, newShape)) {
                    piece.shape = newShape;
                    draw();
                } else {
                    // 尝试墙踢(左右移动一格再旋转)
                    if (!isCollision(0, -1, newShape)) {
                        piece.shape = newShape;
                        piece.col -= 1;
                        draw();
                    } else if (!isCollision(0, 1, newShape)) {
                        piece.shape = newShape;
                        piece.col += 1;
                        draw();
                    }
                }
            }
            
            // 硬降(立即下落)
            function hardDrop() {
                if (gameOver || isPaused) return;
                
                while (movePiece(1, 0)) {
                    // 持续下落直到不能移动
                }
            }
            
            // 绘制游戏
            function draw() {
                drawBoard();
                drawPiece();
            }
            
            // 下落方块
            function dropPiece() {
                movePiece(1, 0);
            }
            
            // 重置下落间隔
            function resetDropInterval() {
                if (dropInterval) {
                    clearInterval(dropInterval);
                }
                dropInterval = setInterval(dropPiece, dropSpeed);
            }
            
            // 显示覆盖层
            function showOverlay(title, text, btnText) {
                overlayTitle.textContent = title;
                overlayText.textContent = text;
                overlayBtn.textContent = btnText;
                gameOverlay.classList.add('active');
            }
            
            // 隐藏覆盖层
            function hideOverlay() {
                gameOverlay.classList.remove('active');
            }
            
            // 开始新游戏
            function startGame() {
                board = createBoard(ROWS, COLS);
                score = 0;
                level = 1;
                gameOver = false;
                isPaused = false;
                dropSpeed = 1000;
                
                scoreElement.textContent = score;
                levelElement.textContent = level;
                
                createPiece();
                draw();
                resetDropInterval();
                hideOverlay();
            }
            
            // 暂停/继续游戏
            function togglePause() {
                if (gameOver) return;
                
                isPaused = !isPaused;
                
                if (isPaused) {
                    clearInterval(dropInterval);
                    showOverlay('游戏暂停', '点击继续按钮返回游戏', '继续游戏');
                } else {
                    resetDropInterval();
                    hideOverlay();
                }
                
                // 更新暂停按钮图标
                pauseBtn.innerHTML = isPaused ? '<i class="fas fa-play text-gray-700"></i>' : '<i class="fas fa-pause text-gray-700"></i>';
            }
            
            // 键盘控制
            function handleKeyDown(e) {
                if (gameOver && e.key === ' ') {
                    startGame();
                    return;
                }
                
                if (isPaused && e.key === 'p') {
                    togglePause();
                    return;
                }
                
                if (gameOver || isPaused) return;
                
                switch (e.key) {
                    case 'ArrowLeft':
                        movePiece(0, -1);
                        break;
                    case 'ArrowRight':
                        movePiece(0, 1);
                        break;
                    case 'ArrowDown':
                        movePiece(1, 0);
                        break;
                    case 'ArrowUp':
                        rotatePiece();
                        break;
                    case ' ':
                        hardDrop();
                        break;
                }
            }
            
            // 触摸控制
            let touchStartX = 0;
            let touchStartY = 0;
            
            function handleTouchStart(e) {
                touchStartX = e.touches[0].clientX;
                touchStartY = e.touches[0].clientY;
            }
            
            function handleTouchEnd(e) {
                if (gameOver || isPaused) return;
                
                const touchEndX = e.changedTouches[0].clientX;
                const touchEndY = e.changedTouches[0].clientY;
                
                const diffX = touchEndX - touchStartX;
                const diffY = touchEndY - touchStartY;
                
                // 水平滑动距离大于垂直滑动距离时，认为是左右移动
                if (Math.abs(diffX) > Math.abs(diffY)) {
                    if (diffX > 0) {
                        movePiece(0, 1); // 右
                    } else {
                        movePiece(0, -1); // 左
                    }
                } else {
                    if (diffY > 0) {
                        movePiece(1, 0); // 下
                    } else {
                        rotatePiece(); // 上(旋转)
                    }
                }
            }
            
            // 事件监听
            document.addEventListener('keydown', handleKeyDown);
            boardElement.addEventListener('touchstart', handleTouchStart, { passive: true });
            boardElement.addEventListener('touchend', handleTouchEnd, { passive: true });
            
            leftBtn.addEventListener('click', () => movePiece(0, -1));
            rightBtn.addEventListener('click', () => movePiece(0, 1));
            downBtn.addEventListener('click', () => movePiece(1, 0));
            rotateBtn.addEventListener('click', rotatePiece);
            dropBtn.addEventListener('click', hardDrop);
            pauseBtn.addEventListener('click', togglePause);
            overlayBtn.addEventListener('click', () => {
                if (gameOver) {
                    startGame();
                } else {
                    togglePause();
                }
            });
            
            // 开始游戏
            startGame();
        });
    </script>
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