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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background: linear-gradient(135deg, #E1BEE7 0%, #9C27B0 100%);
            min-height: 100vh;
            color: #fff;
            overflow-x: hidden;
            user-select: none;
        }

        .game-container {
            max-width: 1000px;
            margin: 0 auto;
            padding: 20px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .game-header {
            text-align: center;
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(20px);
            border-radius: 20px;
            padding: 25px;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .game-header h1 {
            font-size: 2.5rem;
            font-weight: 300;
            margin-bottom: 10px;
            letter-spacing: 3px;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
        }

        .game-subtitle {
            font-size: 1rem;
            opacity: 0.8;
            letter-spacing: 1px;
        }

        .game-mode-selector {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(20px);
            border-radius: 20px;
            padding: 25px;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .game-mode-selector h3 {
            text-align: center;
            margin-bottom: 20px;
            font-weight: 300;
            font-size: 1.3rem;
        }

        .mode-buttons {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 15px;
        }

        .mode-btn {
            padding: 20px;
            border: none;
            border-radius: 15px;
            background: rgba(255, 255, 255, 0.1);
            color: white;
            cursor: pointer;
            transition: all 0.3s ease;
            text-align: center;
            border: 2px solid transparent;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
        }

        .mode-btn span {
            font-size: 2rem;
        }

        .mode-btn div {
            font-weight: 600;
            font-size: 1rem;
        }

        .mode-btn small {
            opacity: 0.7;
            font-size: 0.8rem;
        }

        .mode-btn:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-2px);
        }

        .mode-btn.active {
            background: rgba(255, 255, 255, 0.25);
            border-color: rgba(255, 255, 255, 0.5);
        }

        .game-stats {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
            gap: 15px;
        }

        .stat-card {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(20px);
            border-radius: 15px;
            padding: 20px;
            text-align: center;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .stat-value {
            font-size: 2rem;
            font-weight: 600;
            margin-bottom: 5px;
            text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
        }

        .stat-label {
            font-size: 0.9rem;
            opacity: 0.8;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .game-area {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(20px);
            border-radius: 20px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            height: 500px;
            position: relative;
            overflow: hidden;
            cursor: crosshair;
        }

        .balloon {
            position: absolute;
            cursor: pointer;
            transition: all 0.1s ease;
            animation: float-up linear;
            font-size: 3rem;
            user-select: none;
            z-index: 10;
        }

        .balloon:hover {
            transform: scale(1.1);
        }

        .balloon.popping {
            animation: pop 0.3s ease-out forwards;
        }

        @keyframes float-up {
            from {
                transform: translateY(0);
            }
            to {
                transform: translateY(-520px);
            }
        }

        @keyframes pop {
            0% {
                transform: scale(1);
                opacity: 1;
            }
            50% {
                transform: scale(1.3);
                opacity: 0.8;
            }
            100% {
                transform: scale(0);
                opacity: 0;
            }
        }

        .balloon.red { color: #F44336; }
        .balloon.pink { color: #E91E63; }
        .balloon.purple { color: #9C27B0; }
        .balloon.blue { color: #2196F3; }
        .balloon.cyan { color: #00BCD4; }
        .balloon.green { color: #4CAF50; }
        .balloon.yellow { color: #FFEB3B; }
        .balloon.orange { color: #FF9800; }

        .balloon.special {
            animation: special-float linear, special-glow 1s ease-in-out infinite alternate;
            font-size: 4rem;
        }

        @keyframes special-glow {
            from {
                filter: drop-shadow(0 0 5px currentColor);
            }
            to {
                filter: drop-shadow(0 0 15px currentColor);
            }
        }

        .balloon.bomb {
            color: #424242;
            animation: float-up linear, danger-pulse 0.5s ease-in-out infinite alternate;
        }

        @keyframes danger-pulse {
            from {
                transform: scale(1);
            }
            to {
                transform: scale(1.1);
            }
        }

        .score-popup {
            position: absolute;
            color: #FFD54F;
            font-weight: 600;
            font-size: 1.5rem;
            pointer-events: none;
            animation: score-rise 1s ease-out forwards;
            z-index: 20;
        }

        @keyframes score-rise {
            from {
                opacity: 1;
                transform: translateY(0);
            }
            to {
                opacity: 0;
                transform: translateY(-50px);
            }
        }

        .combo-display {
            position: absolute;
            top: 20px;
            right: 20px;
            background: rgba(255, 215, 79, 0.9);
            color: #333;
            padding: 10px 20px;
            border-radius: 25px;
            font-weight: 600;
            transform: scale(0);
            transition: all 0.3s ease;
        }

        .combo-display.show {
            transform: scale(1);
        }

        .game-controls {
            display: flex;
            gap: 15px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn {
            padding: 12px 24px;
            border: none;
            border-radius: 25px;
            background: #8E24AA;
            color: white;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 0.9rem;
            box-shadow: 0 4px 15px rgba(142, 36, 170, 0.3);
            min-width: 120px;
        }

        .btn:hover {
            background: #7B1FA2;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(142, 36, 170, 0.4);
        }

        .btn:disabled {
            opacity: 0.5;
            cursor: not-allowed;
            transform: none;
        }

        .btn.start-btn {
            background: #4CAF50;
            box-shadow: 0 4px 15px rgba(76, 175, 80, 0.3);
        }

        .btn.start-btn:hover {
            background: #43A047;
        }

        .btn.secondary {
            background: rgba(255, 255, 255, 0.2);
            box-shadow: 0 4px 15px rgba(255, 255, 255, 0.1);
        }

        .btn.secondary:hover {
            background: rgba(255, 255, 255, 0.3);
        }

        .achievements {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(20px);
            border-radius: 20px;
            padding: 25px;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .achievements h3 {
            text-align: center;
            margin-bottom: 20px;
            font-weight: 300;
            font-size: 1.2rem;
        }

        .achievement-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 10px;
        }

        .achievement-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 15px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 12px;
            font-size: 0.9rem;
            transition: all 0.3s ease;
        }

        .achievement-item.unlocked {
            background: rgba(255, 215, 79, 0.2);
            border: 1px solid rgba(255, 215, 79, 0.3);
        }

        .achievement-icon {
            font-size: 1.5rem;
        }

        .achievement-text {
            flex: 1;
        }

        /* 弹窗样式 */
        .popup {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.8);
            backdrop-filter: blur(10px);
            display: none;
            align-items: center;
            justify-content: center;
            z-index: 1000;
        }

        .popup.show {
            display: flex;
        }

        .popup-content {
            background: linear-gradient(135deg, #E1BEE7 0%, #9C27B0 100%);
            border-radius: 25px;
            padding: 40px;
            text-align: center;
            max-width: 500px;
            width: 90%;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
            border: 2px solid rgba(255, 255, 255, 0.2);
            max-height: 80vh;
            overflow-y: auto;
        }

        .popup-content h2 {
            font-size: 2rem;
            margin-bottom: 25px;
            font-weight: 300;
        }

        .final-stats {
            display: grid;
            gap: 15px;
            margin-bottom: 25px;
        }

        .stat-display {
            display: flex;
            align-items: center;
            gap: 15px;
            padding: 15px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 15px;
        }

        .stat-icon {
            font-size: 2rem;
            width: 50px;
            text-align: center;
        }

        .popup-actions {
            display: flex;
            gap: 15px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .game-container {
                padding: 15px;
                gap: 15px;
            }
            
            .game-header h1 {
                font-size: 2rem;
            }
            
            .mode-buttons {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .game-area {
                height: 400px;
            }
            
            .balloon {
                font-size: 2.5rem;
            }
            
            .balloon.special {
                font-size: 3rem;
            }
            
            .game-controls {
                flex-direction: column;
                align-items: center;
            }
            
            .btn {
                min-width: 200px;
            }
        }

        @media (max-width: 480px) {
            .mode-buttons {
                grid-template-columns: 1fr;
            }
            
            .game-stats {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .achievement-list {
                grid-template-columns: 1fr;
            }
        }