:root {
            --primary-blue: #1a237e;
            --secondary-blue: #0d47a1;
            --accent-green: #00e676;
            --accent-red: #ff5252;
            --accent-yellow: #ffd740;
            --glass-bg: rgba(255, 255, 255, 0.08);
            --glass-border: rgba(255, 255, 255, 0.15);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            margin: 0;
            padding: 0;
            overflow: hidden;
            background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
            min-height: 100vh;
            position: relative;
        }

        /* 全屏游戏容器 */
        #gameContainer {
            position: fixed;
            top: 0;
            left: 0;
            width: 100vw;
            height: 100vh;
            z-index: 1;
        }

        #gameCanvas {
            display: block;
            width: 100%;
            height: 100%;
            background: transparent;
        }

        /* 游戏信息面板 - 毛玻璃效果 */
        .game-info-panel {
            position: fixed;
            top: 80px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 100;
            display: flex;
            gap: 40px;
            padding: 15px 30px;
            background: var(--glass-bg);
            backdrop-filter: blur(10px) saturate(120%);
            -webkit-backdrop-filter: blur(10px) saturate(120%);
            border: 1px solid var(--glass-border);
            border-radius: 20px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
            transition: all 0.3s ease;
        }

        .info-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            color: white;
            min-width: 100px;
        }

        .info-label {
            font-size: 14px;
            opacity: 0.8;
            margin-bottom: 5px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .info-value {
            font-size: 28px;
            font-weight: bold;
            text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
        }

        #score {
            color: var(--accent-yellow);
        }

        #lives {
            color: var(--accent-green);
        }

        #best {
            color: #64b5f6;
        }

        /* 控制按钮 */
        .control-buttons {
            position: fixed;
            bottom: 30px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 100;
            display: flex;
            gap: 20px;
        }

        .control-btn {
            padding: 14px 32px;
            font-size: 18px;
            font-weight: 500;
            cursor: pointer;
            border: none;
            border-radius: 25px;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            background: var(--glass-bg);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            color: white;
            border: 1px solid var(--glass-border);
            min-width: 160px;
            text-align: center;
        }

        .control-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 24px rgba(0, 0, 0, 0.3);
            background: rgba(255, 255, 255, 0.15);
        }

        #restartBtn {
            background: linear-gradient(135deg, var(--accent-green), #00c853);
            border: none;
        }

        #pauseBtn {
            background: linear-gradient(135deg, #ff9800, #f57c00);
            border: none;
        }

        /* 游戏结束覆盖层 */
        #gameOverOverlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.85);
            display: none;
            justify-content: center;
            align-items: center;
            z-index: 1000;
            backdrop-filter: blur(5px);
        }

        .game-over-modal {
            background: var(--glass-bg);
            backdrop-filter: blur(20px) saturate(120%);
            -webkit-backdrop-filter: blur(20px) saturate(120%);
            border: 1px solid var(--glass-border);
            border-radius: 24px;
            padding: 40px;
            text-align: center;
            max-width: 500px;
            width: 90%;
            animation: modalAppear 0.6s cubic-bezier(0.4, 0, 0.2, 1);
        }

        @keyframes modalAppear {
            from {
                opacity: 0;
                transform: translateY(40px) scale(0.9);
            }

            to {
                opacity: 1;
                transform: translateY(0) scale(1);
            }
        }

        .game-over-title {
            color: white;
            font-size: 48px;
            margin-bottom: 20px;
            text-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
        }

        .game-over-score {
            color: var(--accent-yellow);
            font-size: 32px;
            margin: 20px 0;
            font-weight: bold;
        }

        .new-best-badge {
            background: linear-gradient(135deg, #ffd740, #ffab00);
            color: #333;
            padding: 8px 20px;
            border-radius: 20px;
            display: inline-block;
            margin: 15px 0;
            font-weight: bold;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {

            0%,
            100% {
                transform: scale(1);
            }

            50% {
                transform: scale(1.05);
            }
        }

        /* 气泡样式增强 */
        .bubble-hit-effect {
            position: absolute;
            pointer-events: none;
            z-index: 10;
            animation: bubbleHit 0.6s forwards;
        }

        @keyframes bubbleHit {
            0% {
                transform: scale(1);
                opacity: 1;
            }

            100% {
                transform: scale(2);
                opacity: 0;
            }
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .game-info-panel {
                top: 80px;
                gap: 20px;
                padding: 10px 20px;
            }

            .info-item {
                min-width: 70px;
            }

            .info-label {
                font-size: 12px;
            }

            .info-value {
                font-size: 22px;
            }

            .control-buttons {
                bottom: 20px;
                flex-direction: column;
                gap: 10px;
            }

            .control-btn {
                padding: 12px 24px;
                font-size: 16px;
                min-width: 140px;
            }

            .game-over-title {
                font-size: 36px;
            }

            .game-over-score {
                font-size: 24px;
            }
        }

        /* 触摸设备优化 */
        @media (hover: none) and (pointer: coarse) {
            .control-btn {
                padding: 16px 32px;
                min-width: 180px;
            }

            #gameCanvas {
                touch-action: none;
            }
        }

        /* 规则弹窗样式 */
        #rulesModal {
            background: var(--glass-bg);
            backdrop-filter: blur(20px) saturate(120%);
            -webkit-backdrop-filter: blur(20px) saturate(120%);
            border: 1px solid var(--glass-border);
            border-radius: 20px;
            padding: 30px;
            text-align: center;
            max-width: 450px;
            width: 90%;
            animation: modalAppear 0.6s ease-out;
        }

        #rulesModal h2 {
            color: white;
            margin-bottom: 20px;
            font-size: 28px;
        }

        #rulesModal p {
            color: rgba(255, 255, 255, 0.9);
            margin: 15px 0;
            line-height: 1.6;
        }

        .rule-highlight {
            color: var(--accent-green);
            font-weight: bold;
        }

        .rule-warning {
            color: var(--accent-red);
            font-weight: bold;
        }

        .rules-checkbox {
            margin: 20px 0;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            color: rgba(255, 255, 255, 0.8);
        }

        #startGameBtn {
            background: linear-gradient(135deg, var(--accent-green), #00c853);
            color: white;
            border: none;
            padding: 14px 40px;
            border-radius: 25px;
            font-size: 18px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s ease;
            margin-top: 10px;
        }

        #startGameBtn:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 24px rgba(0, 230, 118, 0.3);
        }