/* 기존 스타일 유지 */
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }
        .container {
            max-width: 600px;
            width: 100%;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(20px);
            border-radius: 24px;
            padding: 60px 40px;
            text-align: center;
            box-shadow: 0 25px 50px rgba(0, 0, 0, 0.2);
            animation: slideUp 0.8s ease-out;
        }
        @keyframes slideUp {
            from { opacity: 0; transform: translateY(30px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .app-icon {
            width: 120px;
            height: 120px;
            background: #fff;
            border-radius: 28px;
            margin: 0 auto 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 48px;
            color: white;
            box-shadow: 0 15px 35px rgba(99, 99, 99, 0.3);
            animation: float 3s ease-in-out infinite;
        }
        .app-icon img {
            max-width: 90%;
        }
        @keyframes float {
            0%, 100% { transform: translateY(0px); }
            50% { transform: translateY(-10px); }
        }
        h1 {
            font-size: 3rem;
            font-weight: 700;
            color: #2c3e50;
            margin-bottom: 10px;
            background: linear-gradient(135deg, #667eea, #764ba2);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .subtitle {
            font-size: 1.2rem;
            color: #7f8c8d;
            margin-bottom: 50px;
            line-height: 1.6;
        }
        .download-buttons {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
            margin-bottom: 40px;
        }
        .download-btn {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 16px 28px;
            text-decoration: none;
            border-radius: 16px;
            font-weight: 600;
            font-size: 1.25rem;
            transition: all 0.3s ease;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
            color: white;
        }
        .download-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
        }
        .download-btn.android {
            background: black; /* 구글플레이 그린 */
        }
        .download-btn.ios {
            background: black; /* 애플 앱스토어 블루 */
        }
        .btn-icon {
            width: 28px;
            height: 28px;
            fill: currentColor;
        }
        .features {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 30px;
            margin-top: 50px;
        }
        .feature {
            text-align: center;
        }
        .feature-icon {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, #f093fb, #f5576c);
            border-radius: 50%;
            margin: 0 auto 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
        }
        .feature h3 {
            font-size: 1.1rem;
            color: #2c3e50;
            margin-bottom: 8px;
        }
        .feature p {
            color: #7f8c8d;
            font-size: 0.9rem;
        }
        .footer {
            margin-top: 40px;
            text-align: center;
            font-size: 0.9rem;
            color: #7f8c8d;
            line-height: 1.6;
            border-top: 1px solid rgba(0, 0, 0, 0.1);
            padding-top: 20px;
        }
        @media (max-width: 768px) {
            .container { padding: 40px 20px; }
            h1 { font-size: 2.2rem; }
            .download-buttons {
                flex-direction: column;
                align-items: center;
            }
            .download-btn {
                width: 100%;
                max-width: 280px;
                justify-content: center;
            }
        }