初始提交：网页版俄罗斯方块游戏

- 使用 HTML + CSS + JavaScript 实现
- 实现完整的游戏逻辑：方块移动、旋转、消行、计分
- 支持等级系统和加速机制
- 响应式设计，支持移动端
- 下一个方块预览功能
- 游戏暂停/继续功能

style.css

@@ -0,0 +1,180 @@
+* {
+    margin: 0;
+    padding: 0;
+    box-sizing: border-box;
+}
+
+body {
+    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
+    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+    min-height: 100vh;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    padding: 20px;
+}
+
+.game-container {
+    background: rgba(255, 255, 255, 0.95);
+    border-radius: 20px;
+    padding: 30px;
+    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
+    max-width: 900px;
+}
+
+.header {
+    text-align: center;
+    margin-bottom: 30px;
+}
+
+.header h1 {
+    font-size: 2.5rem;
+    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+    -webkit-background-clip: text;
+    -webkit-text-fill-color: transparent;
+    background-clip: text;
+}
+
+.game-area {
+    display: flex;
+    gap: 30px;
+    justify-content: center;
+    flex-wrap: wrap;
+}
+
+.info-panel {
+    display: flex;
+    flex-direction: column;
+    gap: 15px;
+}
+
+.info-box {
+    background: #f8f9fa;
+    padding: 15px;
+    border-radius: 10px;
+    text-align: center;
+    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
+}
+
+.info-box h3 {
+    font-size: 0.9rem;
+    color: #666;
+    margin-bottom: 5px;
+}
+
+.info-value {
+    font-size: 1.5rem;
+    font-weight: bold;
+    color: #667eea;
+}
+
+#next-canvas {
+    background: #fff;
+    border: 2px solid #667eea;
+    border-radius: 8px;
+}
+
+.canvas-container {
+    position: relative;
+}
+
+#game-canvas {
+    background: #1a1a2e;
+    border: 3px solid #667eea;
+    border-radius: 10px;
+    display: block;
+}
+
+.game-over {
+    position: absolute;
+    top: 50%;
+    left: 50%;
+    transform: translate(-50%, -50%);
+    background: rgba(255, 255, 255, 0.98);
+    padding: 40px;
+    border-radius: 15px;
+    text-align: center;
+    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
+    z-index: 10;
+}
+
+.game-over.hidden {
+    display: none;
+}
+
+.game-over h2 {
+    font-size: 2rem;
+    color: #e74c3c;
+    margin-bottom: 15px;
+}
+
+.game-over p {
+    font-size: 1.2rem;
+    margin-bottom: 20px;
+    color: #333;
+}
+
+.controls-panel {
+    background: #f8f9fa;
+    padding: 20px;
+    border-radius: 10px;
+    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
+    min-width: 200px;
+}
+
+.controls-panel h3 {
+    color: #667eea;
+    margin-bottom: 15px;
+    text-align: center;
+}
+
+.controls-panel ul {
+    list-style: none;
+}
+
+.controls-panel li {
+    padding: 8px 0;
+    color: #555;
+    font-size: 0.9rem;
+}
+
+.btn {
+    width: 100%;
+    padding: 12px 24px;
+    margin-top: 20px;
+    font-size: 1rem;
+    font-weight: bold;
+    color: white;
+    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+    border: none;
+    border-radius: 8px;
+    cursor: pointer;
+    transition: transform 0.2s, box-shadow 0.2s;
+}
+
+.btn:hover {
+    transform: translateY(-2px);
+    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
+}
+
+.btn:active {
+    transform: translateY(0);
+}
+
+@media (max-width: 900px) {
+    .game-area {
+        flex-direction: column;
+        align-items: center;
+    }
+
+    .info-panel {
+        flex-direction: row;
+        flex-wrap: wrap;
+        justify-content: center;
+    }
+
+    .controls-panel {
+        min-width: 100%;
+        text-align: center;
+    }
+}