/* 下载页面内容样式 */
        .download-section {
            padding: 40px 0 80px;
        }
        
        .download-options {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 2rem;
            margin-bottom: 4rem;
        }
        
        .download-card {
            background: white;
            border-radius: 12px;
            padding: 2rem;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            transition: all 0.3s ease;
            border: 1px solid #e2e8f0;
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }
        
        .download-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(135deg, #6366f1, #8b5cf6);
        }
        
        .download-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
        }
        
        .card-header {
            display: flex;
            align-items: center;
            margin-bottom: 1.5rem;
        }
        
        .os-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, #6366f1, #8b5cf6);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.25rem;
            margin-right: 1rem;
        }
        
        .card-title h3 {
            font-size: 1.5rem;
            color: #1e293b;
            margin-bottom: 0.25rem;
        }
        
        .card-title .subtitle {
            font-size: 1rem;
            color: #6366f1;
            font-weight: 600;
        }
        
        .card-description {
            color: #64748b;
            margin-bottom: 1.5rem;
            line-height: 1.6;
        }
        
        .features-list {
            margin-bottom: 1.5rem;
            flex-grow: 1;
        }
        
        .feature-item {
            display: flex;
            align-items: flex-start;
            margin-bottom: 1rem;
        }
        
        .feature-icon {
            color: #10b981;
            margin-right: 0.75rem;
            margin-top: 0.25rem;
            flex-shrink: 0;
        }
        
        .feature-content h4 {
            font-size: 0.95rem;
            color: #1e293b;
            margin-bottom: 0.25rem;
        }
        
        .feature-content p {
            font-size: 0.85rem;
            color: #64748b;
            line-height: 1.5;
        }
        
        .system-requirements-card {
            background: #f0f9ff;
            border-radius: 8px;
            padding: 1rem;
            margin-bottom: 1.5rem;
            border: 1px solid #e0f2fe;
        }
        
        .system-requirements-card .title {
            color: #0369a1;
            font-weight: 600;
            font-size: 0.9rem;
            margin-bottom: 0.5rem;
        }
        
        .system-requirements-card p {
            color: #0c4a6e;
            font-size: 0.85rem;
            line-height: 1.4;
        }
        
        .download-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #6366f1, #8b5cf6);
            color: white;
            text-align: center;
            padding: 0.9rem 1.5rem;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s;
            box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
            gap: 0.5rem;
        }
        
        .download-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
        }
        
        /* 安装说明 */
        .download-instructions {
            margin-bottom: 4rem;
        }
        
        .download-instructions h2 {
            text-align: center;
            font-size: 2rem;
            margin-bottom: 2rem;
            color: #1e293b;
        }
        
        .instructions-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        
        .instruction-step {
            background: white;
            border-radius: 12px;
            padding: 1.5rem;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            display: flex;
            align-items: flex-start;
            gap: 1rem;
        }
        
        .step-number {
            background: linear-gradient(135deg, #6366f1, #8b5cf6);
            color: white;
            width: 2.5rem;
            height: 2.5rem;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            flex-shrink: 0;
        }
        
        .step-content h3 {
            margin-bottom: 0.5rem;
            color: #1e293b;
        }
        
        .step-content p {
            color: #64748b;
        }