* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }
        
        body {
            background: linear-gradient(135deg, #0c1a3a, #6a0a0a, #1c3a6e);
            background-size: 400% 400%;
            animation: gradientBG 18s ease infinite;
            color: #fff;
            min-height: 100vh;
            overflow-x: hidden;
            position: relative;
        }
        
        @keyframes gradientBG {
            0% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
            100% { background-position: 0% 50%; }
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 30px 20px;
            position: relative;
            z-index: 2;
        }
        
        header {
            text-align: center;
            padding: 30px 0;
            margin-bottom: 40px;
            position: relative;
            animation: fadeInDown 1s ease-out;
        }
        
        .logo-container {
            position: relative;
            width: 180px;
            height: 180px;
            margin: 0 auto 30px;
            perspective: 1000px;
        }
        
        .logo {
            width: 100%;
            height: 100%;
            background: radial-gradient(circle, #ffd700, #ff8c00);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 40px rgba(255, 215, 0, 0.6),
                        0 0 80px rgba(255, 140, 0, 0.4),
                        0 0 120px rgba(255, 69, 0, 0.2);
            animation: rotateGlow 15s infinite linear, pulse 3s infinite ease-in-out;
            transform-style: preserve-3d;
        }
        
        @keyframes rotateGlow {
            0% { transform: rotateY(0deg); box-shadow: 0 0 40px rgba(255, 215, 0, 0.6), 0 0 80px rgba(255, 140, 0, 0.4), 0 0 120px rgba(255, 69, 0, 0.2); }
            100% { transform: rotateY(360deg); }
        }
        
        @keyframes pulse {
            0% { transform: scale(1); box-shadow: 0 0 40px rgba(255, 215, 0, 0.6), 0 0 80px rgba(255, 140, 0, 0.4), 0 0 120px rgba(255, 69, 0, 0.2); }
            50% { transform: scale(1.05); box-shadow: 0 0 60px rgba(255, 215, 0, 0.8), 0 0 100px rgba(255, 140, 0, 0.6), 0 0 140px rgba(255, 69, 0, 0.4); }
            100% { transform: scale(1); box-shadow: 0 0 40px rgba(255, 215, 0, 0.6), 0 0 80px rgba(255, 140, 0, 0.4), 0 0 120px rgba(255, 69, 0, 0.2); }
        }
        
        .logo i {
            font-size: 80px;
            color: #8B0000;
            text-shadow: 0 2px 10px rgba(0,0,0,0.3);
            animation: bounce 2s infinite ease-in-out;
        }
        
        @keyframes bounce {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-15px); }
        }
        
        h1 {
            font-size: 4rem;
            font-weight: 900;
            text-shadow: 0 3px 20px rgba(0,0,0,0.5);
            margin-bottom: 15px;
            background: linear-gradient(to right, #ffd700, #ff8c00, #ff4500);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1.1;
            letter-spacing: 3px;
            position: relative;
            display: inline-block;
            animation: fadeInUp 1s ease-out 0.2s both;
        }
        
        h1::after {
            content: "";
            position: absolute;
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
            width: 200px;
            height: 5px;
            background: linear-gradient(to right, #ffd700, #ff8c00);
            border-radius: 3px;
            box-shadow: 0 0 15px rgba(255, 215, 0, 0.7);
        }
        
        .tagline {
            font-size: 1.8rem;
            font-weight: 300;
            max-width: 900px;
            margin: 30px auto 0;
            opacity: 0.9;
            text-shadow: 0 1px 5px rgba(0,0,0,0.3);
            background: rgba(0, 0, 0, 0.3);
            padding: 20px 40px;
            border-radius: 50px;
            border: 1px solid rgba(255, 215, 0, 0.3);
            box-shadow: 0 5px 20px rgba(0,0,0,0.2);
            animation: fadeInUp 1s ease-out 0.4s both;
        }
        
        .content {
            display: grid;
            grid-template-columns: 1fr;
            gap: 40px;
            margin-bottom: 50px;
            animation: fadeInUp 1s ease-out 0.6s both;
        }
        
        .card {
            background: rgba(20, 20, 40, 0.7);
            backdrop-filter: blur(15px);
            border-radius: 30px;
            padding: 50px;
            box-shadow: 0 15px 50px rgba(0, 0, 0, 0.4), 
                        inset 0 0 30px rgba(255, 215, 0, 0.15);
            border: 2px solid rgba(255, 255, 255, 0.15);
            transition: all 0.5s ease;
            position: relative;
            overflow: hidden;
        }
        
        .card::before {
            content: "";
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(255,215,0,0.1) 0%, transparent 70%);
            transform: rotate(30deg);
            pointer-events: none;
        }
        
        .card:hover {
            transform: translateY(-15px) scale(1.02);
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 
                       inset 0 0 40px rgba(255, 215, 0, 0.2);
            background: rgba(30, 30, 50, 0.8);
        }
        
        .card h2 {
            font-size: 2.5rem;
            margin-bottom: 40px;
            color: #FFD700;
            display: flex;
            align-items: center;
            padding-bottom: 20px;
            text-shadow: 0 2px 10px rgba(0,0,0,0.3);
            border-bottom: 3px solid rgba(255, 215, 0, 0.3);
        }
        
        .card h2 i {
            margin-right: 20px;
            font-size: 2.2rem;
            background: rgba(255, 215, 0, 0.2);
            width: 70px;
            height: 70px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            box-shadow: 0 0 20px rgba(255, 215, 0, 0.4);
            animation: pulseIcon 3s infinite;
        }
        
        @keyframes pulseIcon {
            0% { box-shadow: 0 0 20px rgba(255, 215, 0, 0.4); }
            50% { box-shadow: 0 0 30px rgba(255, 215, 0, 0.7), 0 0 50px rgba(255, 140, 0, 0.4); }
            100% { box-shadow: 0 0 20px rgba(255, 215, 0, 0.4); }
        }
        
        .download-container {
            text-align: center;
            padding: 40px;
            background: rgba(0, 0, 0, 0.3);
            border-radius: 25px;
            margin: 30px 0;
            border: 2px dashed rgba(255, 215, 0, 0.4);
            box-shadow: inset 0 0 30px rgba(255, 215, 0, 0.1);
            position: relative;
            overflow: hidden;
        }
        
        .download-container::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(45deg, 
                transparent, 
                rgba(255, 215, 0, 0.1), 
                transparent);
            animation: shine 6s infinite linear;
        }
        
        @keyframes shine {
            0% { transform: translateX(-100%); }
            100% { transform: translateX(100%); }
        }
        
        .btn-intelligent {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #00b09b, #96c93d, #00b09b);
            color: white;
            padding: 22px 60px;
            border-radius: 70px;
            text-decoration: none;
            font-weight: 800;
            font-size: 1.8rem;
            letter-spacing: 2px;
            transition: all 0.4s ease;
            border: none;
            cursor: pointer;
            box-shadow: 0 15px 40px rgba(0, 176, 155, 0.7),
                        0 0 30px rgba(0, 176, 155, 0.5);
            position: relative;
            overflow: hidden;
            margin: 20px 0;
            animation: pulseBtn 3s infinite;
            text-transform: uppercase;
            z-index: 2;
        }
        
        .btn-intelligent::before {
            content: "";
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: linear-gradient(45deg, 
                transparent, 
                rgba(255, 255, 255, 0.3), 
                transparent);
            transform: rotate(45deg);
            transition: all 0.8s;
            z-index: -1;
        }
        
        .btn-intelligent:hover {
            transform: translateY(-8px) scale(1.05);
            box-shadow: 0 20px 50px rgba(0, 176, 155, 0.9),
                        0 0 40px rgba(0, 176, 155, 0.7);
        }
        
        .btn-intelligent:hover::before {
            left: 100%;
        }
        
        @keyframes pulseBtn {
            0% { box-shadow: 0 15px 40px rgba(0, 176, 155, 0.7), 0 0 30px rgba(0, 176, 155, 0.5); }
            50% { box-shadow: 0 15px 50px rgba(0, 176, 155, 0.9), 0 0 40px rgba(0, 176, 155, 0.7), 0 0 60px rgba(0, 176, 155, 0.4); }
            100% { box-shadow: 0 15px 40px rgba(0, 176, 155, 0.7), 0 0 30px rgba(0, 176, 155, 0.5); }
        }
        
        .btn-intelligent i {
            margin-right: 20px;
            font-size: 2.2rem;
            animation: bounce 2s infinite ease-in-out;
        }
        
        .download-text {
            font-size: 1.4rem;
            color: #FFD700;
            margin-top: 30px;
            font-weight: 500;
            text-shadow: 0 0 15px rgba(255,215,0,0.5);
            padding: 15px;
            background: rgba(0, 0, 0, 0.3);
            border-radius: 15px;
            display: inline-block;
        }
        
        .tip {
            background: rgba(0, 0, 0, 0.4);
            padding: 30px;
            border-radius: 25px;
            margin-top: 40px;
            font-size: 1.2rem;
            border: 1px solid rgba(255, 215, 0, 0.3);
            box-shadow: inset 0 0 25px rgba(255, 215, 0, 0.1);
            animation: fadeIn 1.5s ease-out;
        }
        
        .tip i {
            color: #FFD700;
            margin-right: 15px;
            font-size: 1.6rem;
            animation: pulseIcon 3s infinite;
        }
        
        .feature-list {
            margin-top: 30px;
        }
        
        .feature-item {
            display: flex;
            align-items: center;
            padding: 20px;
            margin: 15px 0;
            border-radius: 20px;
            background: rgba(0, 0, 0, 0.2);
            transition: all 0.4s ease;
            border-left: 5px solid rgba(255, 215, 0, 0.5);
            animation: fadeInLeft 0.8s ease-out;
        }
        
        .feature-item:hover {
            background: rgba(255, 215, 0, 0.1);
            transform: translateX(15px);
            box-shadow: 0 10px 30px rgba(0,0,0,0.3);
        }
        
        .feature-item i {
            width: 60px;
            height: 60px;
            background: rgba(255, 215, 0, 0.2);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 25px;
            font-size: 1.8rem;
            color: #FFD700;
            box-shadow: 0 0 20px rgba(255, 215, 0, 0.3);
            flex-shrink: 0;
            animation: pulseIcon 3s infinite;
        }
        
        .feature-text h3 {
            font-size: 1.8rem;
            margin-bottom: 10px;
            color: #FFD700;
            text-shadow: 0 0 10px rgba(255,215,0,0.3);
        }
        
        .feature-text p {
            font-size: 1.2rem;
            color: #ddd;
            line-height: 1.6;
        }
        
        .btn-play {
            background: linear-gradient(135deg, #FF512F, #F09819, #FF512F);
            box-shadow: 0 15px 40px rgba(240, 152, 25, 0.7);
            display: block;
            width: 100%;
            padding: 25px;
            font-size: 2rem;
            margin-top: 40px;
            letter-spacing: 3px;
            font-weight: 800;
            text-transform: uppercase;
            border-radius: 20px;
            transition: all 0.4s ease;
            animation: pulseBtnRed 3s infinite;
        }
        
        .btn-play:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 50px rgba(240, 152, 25, 0.9),
                        0 0 40px rgba(240, 152, 25, 0.7);
        }
        
        @keyframes pulseBtnRed {
            0% { box-shadow: 0 15px 40px rgba(240, 152, 25, 0.7); }
            50% { box-shadow: 0 15px 50px rgba(240, 152, 25, 0.9), 0 0 40px rgba(240, 152, 25, 0.7); }
            100% { box-shadow: 0 15px 40px rgba(240, 152, 25, 0.7); }
        }
        
        .btn-play i {
            margin-left: 15px;
            animation: bounce 2s infinite ease-in-out;
        }
        
        .mahjong-tiles {
            display: flex;
            justify-content: center;
            margin: 60px 0;
            flex-wrap: wrap;
            gap: 25px;
            perspective: 1000px;
            animation: fadeIn 1s ease-out 0.8s both;
        }
        
        .tile {
            width: 100px;
            height: 130px;
            background: linear-gradient(145deg, #f1c27d, #e0b468);
            border-radius: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #8B0000;
            font-weight: bold;
            font-size: 2.5rem;
            box-shadow: 0 12px 30px rgba(0,0,0,0.4),
                        0 0 20px rgba(255,215,0,0.4);
            transform: rotate(5deg) translateY(0);
            transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            border: 4px solid #d4a95a;
            position: relative;
            overflow: hidden;
            text-shadow: 0 2px 5px rgba(0,0,0,0.2);
        }
        
        .tile::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(45deg, 
                transparent, 
                rgba(255,255,255,0.4), 
                transparent);
            transform: translateX(-100%);
        }
        
        .tile:nth-child(2n) {
            transform: rotate(-5deg) translateY(0);
        }
        
        .tile:hover {
            transform: rotate(0) scale(1.2);
            z-index: 2;
            box-shadow: 0 20px 40px rgba(0,0,0,0.5), 
                        0 0 30px rgba(255,215,0,0.6),
                        0 0 50px rgba(255,140,0,0.4);
        }
        
        .tile:hover::before {
            animation: shine 0.8s;
        }
        
        footer {
            text-align: center;
            padding: 40px 0;
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.7);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            margin-top: 40px;
            background: rgba(0, 0, 0, 0.25);
            border-radius: 20px;
            animation: fadeIn 1.5s ease-out;
        }
        
        /* 动画关键帧 */
        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }
        
        @keyframes fadeInUp {
            from { 
                opacity: 0;
                transform: translateY(50px);
            }
            to { 
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        @keyframes fadeInDown {
            from { 
                opacity: 0;
                transform: translateY(-50px);
            }
            to { 
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        @keyframes fadeInLeft {
            from { 
                opacity: 0;
                transform: translateX(-50px);
            }
            to { 
                opacity: 1;
                transform: translateX(0);
            }
        }
        
        /* 背景动画元素 */
        .bg-elements {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: 1;
            overflow: hidden;
            pointer-events: none;
        }
        
        .element {
            position: absolute;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
            animation: float 25s infinite linear;
            box-shadow: 0 0 30px rgba(255,215,0,0.3);
            opacity: 0.7;
        }
        
        @keyframes float {
            0% {
                transform: translateY(0) translateX(0) rotate(0deg);
                opacity: 0;
            }
            10% {
                opacity: 0.7;
            }
            90% {
                opacity: 0.7;
            }
            100% {
                transform: translateY(-1500px) translateX(1500px) rotate(720deg);
                opacity: 0;
            }
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            h1 {
                font-size: 3rem;
            }
            
            .tagline {
                font-size: 1.5rem;
                padding: 15px 30px;
            }
            
            .card {
                padding: 40px 30px;
            }
            
            .logo-container {
                width: 150px;
                height: 150px;
            }
            
            .logo i {
                font-size: 70px;
            }
        }
        
        @media (max-width: 768px) {
            h1 {
                font-size: 2.5rem;
            }
            
            .tagline {
                font-size: 1.3rem;
                padding: 12px 20px;
            }
            
            .card {
                padding: 30px 20px;
            }
            
            .tile {
                width: 85px;
                height: 115px;
                font-size: 2.2rem;
            }
            
            .btn-intelligent {
                padding: 18px 40px;
                font-size: 1.5rem;
            }
            
            .feature-item {
                padding: 15px;
            }
            
            .feature-item i {
                width: 50px;
                height: 50px;
                font-size: 1.5rem;
                margin-right: 15px;
            }
        }
        
        @media (max-width: 480px) {
            h1 {
                font-size: 2rem;
            }
            
            .logo-container {
                width: 120px;
                height: 120px;
            }
            
            .logo i {
                font-size: 50px;
            }
            
            .btn-intelligent {
                width: 100%;
                padding: 15px;
                font-size: 1.3rem;
            }
            
            .tile {
                width: 70px;
                height: 100px;
                font-size: 2rem;
            }
            
            .feature-text h3 {
                font-size: 1.5rem;
            }
            
            .feature-text p {
                font-size: 1rem;
            }
            
            .btn-play {
                font-size: 1.6rem;
                padding: 20px;
            }
        }
        .play-container {
    text-align: center;
    margin-top: 40px;
}

.btn-play {
    background: linear-gradient(135deg, #FF512F, #F09819, #FF512F);
    box-shadow: 0 15px 40px rgba(240, 152, 25, 0.7);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 22px 60px;
    font-size: 1.8rem;
    letter-spacing: 2px;
    font-weight: 800;
    border-radius: 40px;
    transition: all 0.4s ease;
    cursor: pointer;
    border: none;
    color: white;
    animation: pulseBtnRed 3s infinite;
    text-transform: uppercase;
}

.btn-play:hover {
    transform: translateY(-6px) scale(1.03);
    box-shadow: 0 20px 50px rgba(240, 152, 25, 0.9),
                0 0 40px rgba(240, 152, 25, 0.7);
}

.btn-play i {
    margin-left: 15px;
    animation: bounce 2s infinite ease-in-out;
}

.btn-label {
    font-size: 1.8rem;
}

.btn-play.loading {
    background: linear-gradient(135deg, #6A11CB, #2575FC);
}

.btn-play.loading i {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
/* 在原有样式基础上添加以下内容 */

/* 设备信息样式 */
.device-info {
    font-size: 1.2rem;
    margin-top: 20px;
    padding: 10px 20px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 30px;
    display: inline-block;
    border: 1px solid rgba(255, 215, 0, 0.3);
}

.device-info span {
    color: #FFD700;
    font-weight: bold;
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
}

/* 下载状态样式 */
.download-status {
    margin-top: 15px;
    padding: 10px 20px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 15px;
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

.download-status.success {
    background: rgba(0, 176, 155, 0.3);
    color: #00FFD9;
    box-shadow: 0 0 20px rgba(0, 176, 155, 0.5);
}

.download-status.error {
    background: rgba(176, 0, 32, 0.3);
    color: #FF4D6D;
    box-shadow: 0 0 20px rgba(176, 0, 32, 0.5);
}