<style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }
        
        body {
            background: linear-gradient(135deg, #f5f7fa 0%, #e4edf9 100%);
            color: #333;
            line-height: 1.6;
            min-height: 100vh;
            padding: 15px;
            display: flex;
            flex-direction: column;
        }
        
        .container {
            max-width: 800px;
            margin: 0 auto;
            width: 100%;
            background: white;
            border-radius: 15px;
            box-shadow: 0 5px 25px rgba(0, 0, 0, 0.08);
            overflow: hidden;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        
        /* 头部样式 */
        header {
            background: linear-gradient(120deg, #1a56db 0%, #0e2e6d 100%);
            color: white;
            padding: 25px 20px;
            text-align: center;
            position: relative;
        }
        
        .logo {
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 15px;
        }
        
        .logo-icon {
            width: 50px;
            height: 50px;
            background: linear-gradient(45deg, #4ade80, #22d3ee);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 15px;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
        }
        
        .logo-icon i {
            font-size: 24px;
            color: white;
        }
        
        h1 {
            font-size: 24px;
            font-weight: 700;
            margin: 5px 0;
            letter-spacing: 1px;
        }
        
        .slogan {
            font-size: 16px;
            opacity: 0.9;
            margin-top: 5px;
        }
        
        /* 主要内容区 */
        main {
            padding: 25px 20px;
            flex: 1;
        }
        
        .download-section {
            background: linear-gradient(120deg, #f0f9ff 0%, #e0f2fe 100%);
            border-radius: 12px;
            padding: 25px;
            text-align: center;
            margin-bottom: 30px;
            border: 1px solid #dbeafe;
        }
        
        .download-section h2 {
            color: #1d4ed8;
            font-size: 22px;
            margin-bottom: 15px;
        }
        
        .download-btn {
            display: inline-block;
            background: linear-gradient(to right, #3b82f6, #2563eb);
            color: white;
            padding: 14px 35px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            font-size: 18px;
            margin: 15px 0;
            box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
            transition: all 0.3s ease;
        }
        
        .download-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(59, 130, 246, 0.6);
        }
        
        .download-tip {
            font-size: 14px;
            color: #4b5563;
            margin-top: 10px;
        }
        
        .features {
            margin: 30px 0;
        }
        
        .section-title {
            font-size: 20px;
            color: #1e293b;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #dbeafe;
            position: relative;
        }
        
        .section-title::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 60px;
            height: 2px;
            background: #3b82f6;
        }
        
        .feature-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        
        .feature-card {
            background: white;
            border-radius: 12px;
            padding: 20px;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s ease;
            border: 1px solid #e5e7eb;
        }
        
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
        }
        
        .feature-card h3 {
            font-size: 18px;
            color: #1e40af;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
        }
        
        .feature-card h3 i {
            margin-right: 10px;
            color: #3b82f6;
        }
        
        .feature-card p {
            font-size: 14px;
            color: #4b5563;
        }
        
        .how-to-use {
            margin: 40px 0 30px;
        }
        
        .steps {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin-top: 20px;
        }
        
        .step {
            flex: 1;
            min-width: 150px;
            text-align: center;
            padding: 20px 15px;
            background: #f8fafc;
            border-radius: 10px;
            border: 1px solid #e2e8f0;
        }
        
        .step-number {
            display: inline-block;
            width: 30px;
            height: 30px;
            background: #3b82f6;
            color: white;
            border-radius: 50%;
            line-height: 30px;
            margin-bottom: 10px;
            font-weight: bold;
        }
        
        /* 页脚样式 */
        footer {
            background: #1e293b;
            color: #cbd5e1;
            padding: 25px 20px;
            text-align: center;
            font-size: 14px;
        }
        
        .footer-links {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 20px;
            margin: 15px 0;
        }
        
        .footer-links a {
            color: #93c5fd;
            text-decoration: none;
        }
        
        .footer-links a:hover {
            color: white;
            text-decoration: underline;
        }
        
        .copyright {
            margin-top: 20px;
            color: #94a3b8;
            font-size: 13px;
        }
        
        /* 响应式调整 */
        @media (max-width: 600px) {
            .feature-grid {
                grid-template-columns: 1fr;
            }
            
            .steps {
                flex-direction: column;
            }
            
            h1 {
                font-size: 21px;
            }
            
            .download-section {
                padding: 20px 15px;
            }
            
            .download-btn {
                padding: 12px 30px;
                font-size: 16px;
            }
        }
        
        /* 动画效果 */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .animate-fade {
            animation: fadeIn 0.8s ease forwards;
        }
        
        .delay-1 { animation-delay: 0.1s; }
        .delay-2 { animation-delay: 0.3s; }
        .delay-3 { animation-delay: 0.5s; }
    </style>