* { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: 'Inter', sans-serif; background: linear-gradient(135deg, #F8FAFF 0%, #E8EDFA 100%); color: #1A2C3E; line-height: 1.5; min-height: 100vh; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        
       
        /* 下载头部 */
        .download-header { text-align: center; padding: 60px 0 40px; }
        .download-header h1 { font-size: 48px; font-weight: 800; background: linear-gradient(135deg, #1A2C3E, #2C6BFF); background-clip: text; -webkit-background-clip: text; color: transparent; margin-bottom: 16px; }
        .download-header p { font-size: 18px; color: #5A6E8C; max-width: 600px; margin: 0 auto; }
        
        /* 下载卡片网格 */
        .download-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 32px; margin: 40px 0 60px; }
        .download-card { background: white; border-radius: 32px; padding: 32px 24px; text-align: center; transition: all 0.3s; box-shadow: 0 8px 24px rgba(0,0,0,0.05); border: 1px solid rgba(0,0,0,0.05); }
        .download-card:hover { transform: translateY(-6px); box-shadow: 0 20px 35px -12px rgba(44,107,255,0.2); border-color: rgba(44,107,255,0.2); }
        .platform-icon { font-size: 56px; margin-bottom: 20px; }
        .platform-name { font-size: 28px; font-weight: 700; margin-bottom: 8px; }
        .version { color: #8A99B4; font-size: 13px; margin-bottom: 16px; }
        .btn-download { display: inline-flex; align-items: center; gap: 8px; background: #2C6BFF; color: white; padding: 12px 28px; border-radius: 48px; text-decoration: none; font-weight: 600; transition: 0.2s; margin: 16px 0; border: none; cursor: pointer; font-size: 16px; }
        .btn-download:hover { background: #1a56e0; transform: translateY(-2px); box-shadow: 0 6px 14px rgba(44,107,255,0.3); }
        .qrcode-placeholder { background: #F8FAFE; border-radius: 16px; padding: 16px; margin-top: 16px; display: inline-block; width: 100%; max-width: 180px; margin-left: auto; margin-right: auto; }
        .qrcode-placeholder .icon { font-size: 48px; opacity: 0.6; }
        .qrcode-placeholder p { font-size: 12px; color: #8A99B4; margin-top: 8px; }
        .features-list { list-style: none; margin-top: 20px; text-align: left; padding: 0 16px; }
        .features-list li { font-size: 13px; color: #5A6E8C; margin-bottom: 8px; display: flex; align-items: center; gap: 8px; }
        .features-list li::before { content: "✓"; color: #2C6BFF; font-weight: 600; }
        
        /* APP卡片内只显示二维码，不显示按钮；PC卡片内只显示按钮，不显示二维码 */
        .app-card .btn-download { display: none; }
        .pc-card .qrcode-placeholder { display: none; }
        
        /* 移动端扫码下载专区 - 仅显示APP的二维码，不显示PC的 */
        .scan-section { background: white; border-radius: 32px; padding: 40px; margin: 40px 0; text-align: center; border: 1px solid rgba(44,107,255,0.1); }
        .scan-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 48px; margin-top: 32px; }
        .scan-item { text-align: center; }
        .scan-item .qrcode { width: 160px; height: 160px; background: #F8FAFE; border-radius: 24px; display: flex; align-items: center; justify-content: center; margin-bottom: 12px; box-shadow: 0 4px 12px rgba(0,0,0,0.05); }
        .scan-item .qrcode .icon { font-size: 56px; opacity: 0.5; }
        .scan-item p { font-weight: 500; margin-top: 8px; }
        
        /* 页脚 */
        .footer { background: #F8FAFE; padding: 48px 0 24px; margin-top: 40px; border-top: 1px solid #E9EDF2; text-align: center; color: #7D8EAA; font-size: 13px; }
        
        @media (max-width: 768px) {
            .download-header h1 { font-size: 36px; }
            .btn-download { font-size: 14px; padding: 10px 20px; }